Drug resistance is one of the most intractable issues in targeted therapy for cancer diseases.It has also been demonstrated to be related to cancer heterogeneity,which promotes the emergence of treatment-refractory ca...Drug resistance is one of the most intractable issues in targeted therapy for cancer diseases.It has also been demonstrated to be related to cancer heterogeneity,which promotes the emergence of treatment-refractory cancer cell populations.Focusing on how cancer cells develop resistance during the encounter with targeted drugs and the immune system,we propose a mathematical model for studying the dynamics of drug resistance in a conjoint heterogeneous tumor-immune setting.We analyze the local geometric properties of the equilibria of the model.Numerical simulations show that the selectively targeted removal of sensitive cancer cells may cause the initially heterogeneous population to become a more resistant population.Moreover,the decline of immune recruitment is a stronger determinant of cancer escape from immune surveillance or targeted therapy than the decay in immune predation strength.Sensitivity analysis of model parameters provides insight into the roles of the immune system combined with targeted therapy in determining treatment outcomes.展开更多
Yunnan and Guizhou are two provinces in Southwest China where in recent years drought disasters have occurred due to natural and human factors. This paper reviewed literature and summarized the related achievements of...Yunnan and Guizhou are two provinces in Southwest China where in recent years drought disasters have occurred due to natural and human factors. This paper reviewed literature and summarized the related achievements of water resources utilization and protection in Yunnan and Guizhou provinces. rivers, and karst ground water in the two provinces, and also This included characters and utilization of precipitation, the various explanations of drought （climate and human factors） and strategies for coping with droughts. Our concluding remarks highlight three lines of future studies： inequalities and equitable use of water distribution, better evaluation systems, and raising awareness through conservation practices.展开更多
In recent years,O2O e-commerce,represented by online group-buying,has developed vigorously,which had significant impacts on urban commercial space.Zhengzhou City is a rising national central city in China,and its e-co...In recent years,O2O e-commerce,represented by online group-buying,has developed vigorously,which had significant impacts on urban commercial space.Zhengzhou City is a rising national central city in China,and its e-commerce development level is ahead,but relevant researches are rare.Therefore,the data of online retailers of Meituan.com was collected and combined with about:blank map and about:blank heat map data.Then,we adopted the methods such as spatial statistics and geodetector to explore the geography and determinants of O2O online retailers in Zhengzhou urban area.The main conclusions are 1)The spatial development of O2O online retailers is characterized by significant global high-value agglomeration.2)The agglomeration areas of different types of O2O online retailers are different.Most of them are concentrated in the old urban area within the Third Ring Road of Zhengzhou City,forming five comprehensive agglomeration areas.3)The areas with the high e-commerce development level are mainly concentrated in the northeast and southwest of the x-shaped region formed by the intersection of Lianyungang-Lanzhou and Beijing-Guangzhou railways.Erqi Square and Guomao 360 Plaza are at the highest development level,followed by Zhongyuan Wanda Plaza and Daxue Middle Road.The development level at other areas is relatively low.4)Zhengzhou’s O2O commercial pattern is highly dependent on physical business.The population distribution,especially the population distribution during the nightlife period,plays a vital role in its spatial development,followed by accessibility.The influences of physical distance are slightly larger than that of time cost,but the difference between them is little.In addition,travelling costs have the least impact.This paper could provide certain references for urban commercial planning.展开更多
Soil microbial flora and influencing factors of soil microbes in soil and gravel-sand mixed layer（ SGSML）,roots denseness layer（ RDL）,eluviate layer（ EL） and calcium accumulation layer（ CAL） in gravel-sand mul...Soil microbial flora and influencing factors of soil microbes in soil and gravel-sand mixed layer（ SGSML）,roots denseness layer（ RDL）,eluviate layer（ EL） and calcium accumulation layer（ CAL） in gravel-sand mulched fields（ GSMFs） with different gravel mulched years（ 1,6,12,19 and 25 years） were studied. The results showed that in the composition of soil microbes in the GSMFs,the quantity of bacteria was the largest,followed by actinomycetes,while the number of fungi was the smallest. The total quantity of soil microorganisms in the GSMFs dropped rapidly with the increase of soil depth,which was related to the sudden decrease in the quantity of bacteria. The number of microbes in the RDL was larger than that in the SGSML with few roots due to the effects of root distribution. The number of bacteria and actinomycete in the growing season was larger than that in the non-growing season,while the quantity of fungi in the growing season was smaller than that in the non-growing season. The quantity of bacteria and fungi was the largest in the GSMFs which had been mulched with gravel for 6-12 years. With the increase of mulching time,the GSMFs aged gradually,so their quantity reduced gradually. The quantity of actinomycetes was the smallest in the GSMFs which had been mulched with gravel for 6-12 years and increased with the increase of mulching time. The number of soil microbes in the GSMFs had a good correlation with soil moisture content,p H and mulching time. Soil total carbon content was an important factor restricting the quantity of soil microbes in the GSMFs.展开更多
Natural resource-management studies have become increasingly attentive to the influences of human factors. Among these,cultural biases shape people’s responses to changes in natural resource systems. Several studies ...Natural resource-management studies have become increasingly attentive to the influences of human factors. Among these,cultural biases shape people’s responses to changes in natural resource systems. Several studies have applied grid-group cultural theory to assess the effects of multiple value biases among stakeholders on natural resource management. We developed and administered a questionnaire in the Heihe River Basin(n = 364) in northwestern China to investigate the appropriateness of applying this theory in the Chinese context of natural resource management. The results revealed various cultural biases among the respondents. In descending order of prevalence, these biases were hierarchism(46.98%), individualism(26.65%), egalitarianism(18.96%), and fatalism(2.78%), with the remaining respondents(4.67%) evidencing no obvious bias. Our empirical study revealed respondents’ worldviews and the influence of sociodemographic characteristics on cultural biases, as theoretically posited. Among the variables examined, age had a positive and significant effect across all biases except individualism. The correlation of income to all cultural biases was consistently negative. Only education had a negative and significant effect across all biases. Women were found to adhere to egalitarianism, whereas men adhered to individualism and hierarchism. Thus, grid-group cultural theory was found to be appropriate in the Chinese context, with gender, age, education, and income evidently accounting for cultural biases. Relationships between environmental attitudes and cultural biases conformed with the hypothesis advanced by grid-group cultural theory. This finding may be of value in explaining individuals’ environmental attitudes and facilitating the development and implementation of natural resource-management policies.展开更多
The Third Plenary Session of the 18 th Central Committee of the Communist Party of China has proposed an important national strategic decision: to explore and establish the balance sheet of natural resources, to imple...The Third Plenary Session of the 18 th Central Committee of the Communist Party of China has proposed an important national strategic decision: to explore and establish the balance sheet of natural resources, to implement leaders’ of-office auditing system about natural resources assets. Water is one of the most essential nature resources of human beings; water resources accounting, as an important water resources management tool, is an essential part of compiling the natural resources balance sheet. In this paper, we provide a summary of the historic evolution of water resources accounting and analyze its application in some typical countries. Although water resources accounting and water resources balance sheet reflect different implications and focus, both require water resources accounts as the basis in system establishment.展开更多
Using hyperspectral data collected in January and June 2022 from the Sha River,the concentrations of total nitrogen(TN)and total phosphorus(TP)were estimated using the differential method.The results indicate that the...Using hyperspectral data collected in January and June 2022 from the Sha River,the concentrations of total nitrogen(TN)and total phosphorus(TP)were estimated using the differential method.The results indicate that the optimal bands for estimation vary monthly due to temperature fluctuations.In the TN model,the power function model at 586 nm in January exhibited the strongest fit,yielding a fit coefficient(R2)of 0.95 and F-value of 164.57 at a significance level(p)of less than 0.01.Conversely,the exponential model at 477 nm in June provided the best fit,with R2=0.93 and F=80.95 at p<0.01.In the TP model,the exponential model fit of the differential values at 851 nm with TP in January produced the best results,with R2=0.78 and F=20.61.However,the overall fit in June outperformed that in January.Specifically,the quadratic and linear model fits of the differential values at 824 and 863 nm with TP achieved R2=0.96 and F-values of 34.42 and 203.34,respectively.展开更多
Folk activities are the most representative form of regional culture,the humanistic care,homeland affection and festival customs that run through them are all vivid and true embodiments of local life.The folk custom a...Folk activities are the most representative form of regional culture,the humanistic care,homeland affection and festival customs that run through them are all vivid and true embodiments of local life.The folk custom activity of"Zhang and Li combined households"is a living inheritance of the historical fact of Mongolian-Han fusion in Taomin region.It takes Shehuo(festival entertainment)as the carrier,and uses rich forms of performance to recognize relatives and worship ancestors.At the same time,as a kind of entertainment and catharsis,it also carries the social function of folk culture,such as maintaining and connecting the emotions between the ethnic groups and neighbors,etc.On the basis of field investigation,this paper deeply describes the folk custom event of"Zhang and Li combined households",shows the whole picture of the grand festival,and discusses the ancestral memory,identifies and ethnic integration process of"Zhang and Li combined households"as a cultural phenomenon.展开更多
In this article, we study the existence of collision local time of two indepen- dent d-dimensional fractional Ornstein-Uhlenbeck processes X＋^H1 and Xt^H2 with different parameters Hi ∈ （0, 1）,i = 1, 2. Under the ...In this article, we study the existence of collision local time of two indepen- dent d-dimensional fractional Ornstein-Uhlenbeck processes X＋^H1 and Xt^H2 with different parameters Hi ∈ （0, 1）,i = 1, 2. Under the canonical framework of white noise analysis, we characterize the collision local time as a Hida distribution and obtain its＇ chaos expansion. Key words Collision local time; fractional Ornstein-Uhlenbeck processes; generalized white noise functionals; choas expansion展开更多
Based on Chinese provincial panel data from 2003 to 2014,the spatial dependence between the environment regulation and carbon emissions is tested by spatial autocorrelation analysis. Besides,spatial lag model and spat...Based on Chinese provincial panel data from 2003 to 2014,the spatial dependence between the environment regulation and carbon emissions is tested by spatial autocorrelation analysis. Besides,spatial lag model and spatial error model are built to empirically test the marginal effect of environmental regulation on carbon emissions and its spatial effect. The result shows that the influence trajectory of environmental regulation on carbon emissions performances inverted ＂ U＂ type. It is ＂ green paradox effect＂ before the inflection point and ＂ reversed transmission reduction effect＂ after the inflection point. Moreover,the carbon emissions show significant spatial spillover effect. In order to achieve the desired effect of environmental regulation and promote carbon reduction,we should increase the environmental regulation intensity reasonably,select rational environmental regulation policy tools,and sufficiently consider the spatial spillover effect of carbon emissions.展开更多
The security and quality of the livelihood of farmers is of paramount concern in rural areas of China. Livelihood stability would force the related polity to act coordinately while eradicating poverty and promoting re...The security and quality of the livelihood of farmers is of paramount concern in rural areas of China. Livelihood stability would force the related polity to act coordinately while eradicating poverty and promoting resource sustainability. For this study, the livelihood approach was used as a framework of analysis that is based upon Sustainable Livelihoods Framework, the core of which is livelihood assets. Livelihood capitals provide substantial contributions to the well-being of numerous rural dwellers. However, the level and degree of reliance on livelihood capital differ across households. Factors that contribute to the economic reliance of households on a particular economic activity in general and on livelihood capital in particular may vary depending upon the type of resource endowment, household demographic, and economic characteristic as well as exoge- nous factors such as markets, prices, policies, and technologies. This study identifies factors that influence a household＇s live- lihood strategy choice with a particular focus on livelihood assets. The study applies a preliminary investigation concerning the relationship between livelihood assets and livelihood strategies, that is, the allocation of assets. Environmentally augmented household livelihood assets were collected from 300 sample households within the Heihe River Basin. Results show that physical assets possess a maximum value （0.609） for farmers and human assets possess a relatively high value （0.516） fol- lowed by social assets （0.354）. Besides, financial and natural assets possess relatively low values （0.286 and 0.241, respec- tively）. An increment of one unit should reduce the occurrence of choosing non-agricultural activities for natural capital while an increment of one unit should increase the occurrence of choosing non-agricultural activities for financial capital, while other variables remain constant. Governments, therefore, should enhance funding and technological support to achieve livelihood diversity and strengthen the facility of farmers by way of establishing relevant polity. It would enable farmers and provide themselves with the ability and asset reserves to transition from agricultural production to secondary and tertiary industries in order to improve the livelihood of farmers overall.展开更多
Let φ be a generalized Orlicz function satisfying(A0),(A1),(A2),(aInc)and(aDec). We prove that the mapping f■f^#:=supB|1/B|∫B|f(x)-fp|dx is continuous on L^φ(·)(R^n) by extrapolation. Based on this result we ...Let φ be a generalized Orlicz function satisfying(A0),(A1),(A2),(aInc)and(aDec). We prove that the mapping f■f^#:=supB|1/B|∫B|f(x)-fp|dx is continuous on L^φ(·)(R^n) by extrapolation. Based on this result we generalize Korn's inequality to the setting of generalized Orlicz spaces, i.e., ‖■f‖Lφ(·)(Ω)■‖Df‖Lφ(·)(Ω). Using the Calderón–Zygmund theory on generalized Orlicz spaces, we obtain that the divergence equation divu = f has a solution u ∈(W^1φ(·)(Ω)0)^n such that ‖■f‖Lφ(·)(Ω)■‖f‖Lφ(Ω).展开更多
Composite fabrics based on Polytetrafluoroethylene(PTFE)polymer displays several notable properties.They are waterproof,windproof,permeable to moisture and thermally insulating at the same time.In the present study,PT...Composite fabrics based on Polytetrafluoroethylene(PTFE)polymer displays several notable properties.They are waterproof,windproof,permeable to moisture and thermally insulating at the same time.In the present study,PTFE fibers are used as raw material to make fiber membranes.The film is formed by crisscrossing interconnected fiber filaments and the related air permeability:tensile creep characteristics and other properties are tested.The results show that the pore size,thickness,and porosity of the film itself can affect the moisture permeability of the film.The water pressure resistance of the selected fabric is 8.5 kPa,and the moisture permeability is 7038 g/(m^(2)·24 h).展开更多
In this article,we investigate the longtime behavior for the following nonautonomous nonclassical parabolic equations on unbounded domain ut−∆ut−∆u+λu=f(x,u(x,t−ρ(t)))+g(x,t).Under some suitable conditions on the d...In this article,we investigate the longtime behavior for the following nonautonomous nonclassical parabolic equations on unbounded domain ut−∆ut−∆u+λu=f(x,u(x,t−ρ(t)))+g(x,t).Under some suitable conditions on the delay term f and the non-autonomous forcing term g,we prove the existence of uniform attractors in Banach space CH1(RN)for the multivalued process generated by non-autonomous nonclassical parabolic equations with delays in unbounded domain.展开更多
In this paper, an adaptive feedback controller is proposed to achieve the finite-time stability of dynamical system. In the proposed scheme, the feedback gain of the adaptive feedback controller is automatically tuned...In this paper, an adaptive feedback controller is proposed to achieve the finite-time stability of dynamical system. In the proposed scheme, the feedback gain of the adaptive feedback controller is automatically tuned according to the adaptation law in order to stabilize unstable fixed points of the system. Based on the Lyapunov function method and the finite-time stability theory, we get a sufficient condition for the finite-time stability. Finally, simulation results show the effectiveness and feasibility of the proposed finite-time controller.展开更多
The purpose of this study was to review the results of a 20-year study in the author’s interpretation of the needs for food products and the value system that determines the market behavior of consumers in the food m...The purpose of this study was to review the results of a 20-year study in the author’s interpretation of the needs for food products and the value system that determines the market behavior of consumers in the food markets.The scientific novelty of the research is the following results:a)The author’s interpretation of the needs for food products,as consisting of three components:(1)The actual need for food(physiological need);(2)the need for emotions obtained from eating(psychological need);and(3)the need for market products that can meet the physiological needs of emotional expectations and social needs(socio-psychological and economic need);b)Interdisciplinary approach to the study of consumer behavior that led to the author’s interpretation of the value of the research methods outlined in the works of J.N.Sheth et al.,extended and supplemented in the study of Galina V.Astratova(1998);c)Identification of the fact that the importance of components in the system of values,according to the results of research,is different for different food products.This allows simulating more clearly the behavior of the consumer in the development of a marketing-mix and developing a marketing strategy based on targeting.展开更多
This paper introduces the types of traditional farm tools,and analyzes the value rationality of these traditional farm tools:on the one hand,these farm tools have witnessed the farming culture,and they are also a mani...This paper introduces the types of traditional farm tools,and analyzes the value rationality of these traditional farm tools:on the one hand,these farm tools have witnessed the farming culture,and they are also a manifestation of local culture in the Taomin area,representing the cultural characteristics and civilization progress of this area.展开更多
Population growth,technological change and increased consumption are considered to be the main causes of the three environmental crisis.Environmental problems which are due to population growth and technology have alr...Population growth,technological change and increased consumption are considered to be the main causes of the three environmental crisis.Environmental problems which are due to population growth and technology have already caused widespread concern,and the environmental problems caused by consumption,did not get enough attention and in-depth research.Is consumption a problem? What is the environmental conflict brought about by the consumption? What factors have contributed to the growing consumers? How do the resources meet the high levels of consumption? What is the relationship between consumption and quality of life? How can we alter consumption patterns? From the water footprint theory,this paper discusses the necessity of advocacy at meeting basic human needs while reducing the consumption of water footprint low water consumption patterns,and recommended by the German Nutrition Society DGE healthy eating pattern as a reference,compared with the normal mode of Australia diet county area of Zhangye City in food consumption,water consumption and total consumption of water footprint component characteristics.展开更多
In this paper, we focus on the space-inhomogeneous three-state on the one-dimension lattice, a one-phase model and a two-phase model include. By using the transfer matrices method by Endo et al., we calculate the stat...In this paper, we focus on the space-inhomogeneous three-state on the one-dimension lattice, a one-phase model and a two-phase model include. By using the transfer matrices method by Endo et al., we calculate the stationary measure for initial state concrete eigenvalue. Finally we found the transfer matrices method is more effective for the three-state quantum walks than the method obtained by Kawai et al.展开更多
Optoelectronic stability of halide perovskite material in hostile conditions such as water is rather limited,preventing them from further industrial deployment.Here,we optimize and perform machine learning analysis on...Optoelectronic stability of halide perovskite material in hostile conditions such as water is rather limited,preventing them from further industrial deployment.Here,we optimize and perform machine learning analysis on CH_(3)NH_(3)PbI_(3)materials with additives,solvents and post-treatment molecules using combined experimental and data-driven methods.A champion system consisting of a compatible tertiary molecular combination‘calcein+PbBr_(2)+DMSO’active at diverse surfaces is identified,delivering a large aqueous photoelectrochemical(PEC)photocurrent of 10-5A/cm^(2)and an improved aqueous stability of 92.5%.展开更多
基金supported by the National Natural Science Foundation of China(11871238,11931019,12371486)。
文摘Drug resistance is one of the most intractable issues in targeted therapy for cancer diseases.It has also been demonstrated to be related to cancer heterogeneity,which promotes the emergence of treatment-refractory cancer cell populations.Focusing on how cancer cells develop resistance during the encounter with targeted drugs and the immune system,we propose a mathematical model for studying the dynamics of drug resistance in a conjoint heterogeneous tumor-immune setting.We analyze the local geometric properties of the equilibria of the model.Numerical simulations show that the selectively targeted removal of sensitive cancer cells may cause the initially heterogeneous population to become a more resistant population.Moreover,the decline of immune recruitment is a stronger determinant of cancer escape from immune surveillance or targeted therapy than the decay in immune predation strength.Sensitivity analysis of model parameters provides insight into the roles of the immune system combined with targeted therapy in determining treatment outcomes.
基金funded by the National Social Science Foundation of China (No. 10CGL050)
文摘Yunnan and Guizhou are two provinces in Southwest China where in recent years drought disasters have occurred due to natural and human factors. This paper reviewed literature and summarized the related achievements of water resources utilization and protection in Yunnan and Guizhou provinces. rivers, and karst ground water in the two provinces, and also This included characters and utilization of precipitation, the various explanations of drought （climate and human factors） and strategies for coping with droughts. Our concluding remarks highlight three lines of future studies： inequalities and equitable use of water distribution, better evaluation systems, and raising awareness through conservation practices.
基金Humanities and Social Sciences Research Project of the Education Department of National Natural Science Foundation of China(No.41701141)Henan Province(No.2020-ZZJH-483,2021-ZZJH-416)+1 种基金Philosophy and Social Science Project of Henan Province(No.2019BTY011)Key Science and Technology Project of Henan Province(No.212102310435)。
文摘In recent years,O2O e-commerce,represented by online group-buying,has developed vigorously,which had significant impacts on urban commercial space.Zhengzhou City is a rising national central city in China,and its e-commerce development level is ahead,but relevant researches are rare.Therefore,the data of online retailers of Meituan.com was collected and combined with about:blank map and about:blank heat map data.Then,we adopted the methods such as spatial statistics and geodetector to explore the geography and determinants of O2O online retailers in Zhengzhou urban area.The main conclusions are 1)The spatial development of O2O online retailers is characterized by significant global high-value agglomeration.2)The agglomeration areas of different types of O2O online retailers are different.Most of them are concentrated in the old urban area within the Third Ring Road of Zhengzhou City,forming five comprehensive agglomeration areas.3)The areas with the high e-commerce development level are mainly concentrated in the northeast and southwest of the x-shaped region formed by the intersection of Lianyungang-Lanzhou and Beijing-Guangzhou railways.Erqi Square and Guomao 360 Plaza are at the highest development level,followed by Zhongyuan Wanda Plaza and Daxue Middle Road.The development level at other areas is relatively low.4)Zhengzhou’s O2O commercial pattern is highly dependent on physical business.The population distribution,especially the population distribution during the nightlife period,plays a vital role in its spatial development,followed by accessibility.The influences of physical distance are slightly larger than that of time cost,but the difference between them is little.In addition,travelling costs have the least impact.This paper could provide certain references for urban commercial planning.
基金Supported by Sheng Tongsheng Science and Technology Innovation Foundation of Gansu Agricultural University(GSAU-STS-1427)Open Foundation for Breeding Base of National Key Laboratory Co-founded by Gansu Province+1 种基金the Ministry of Science and Technology-Gansu Provincial Key Lab of Aridland Crop Science(GSCS-2012-14)National Natural Science Foundation of China(31560356)
文摘Soil microbial flora and influencing factors of soil microbes in soil and gravel-sand mixed layer（ SGSML）,roots denseness layer（ RDL）,eluviate layer（ EL） and calcium accumulation layer（ CAL） in gravel-sand mulched fields（ GSMFs） with different gravel mulched years（ 1,6,12,19 and 25 years） were studied. The results showed that in the composition of soil microbes in the GSMFs,the quantity of bacteria was the largest,followed by actinomycetes,while the number of fungi was the smallest. The total quantity of soil microorganisms in the GSMFs dropped rapidly with the increase of soil depth,which was related to the sudden decrease in the quantity of bacteria. The number of microbes in the RDL was larger than that in the SGSML with few roots due to the effects of root distribution. The number of bacteria and actinomycete in the growing season was larger than that in the non-growing season,while the quantity of fungi in the growing season was smaller than that in the non-growing season. The quantity of bacteria and fungi was the largest in the GSMFs which had been mulched with gravel for 6-12 years. With the increase of mulching time,the GSMFs aged gradually,so their quantity reduced gradually. The quantity of actinomycetes was the smallest in the GSMFs which had been mulched with gravel for 6-12 years and increased with the increase of mulching time. The number of soil microbes in the GSMFs had a good correlation with soil moisture content,p H and mulching time. Soil total carbon content was an important factor restricting the quantity of soil microbes in the GSMFs.
基金supported by the National Natural Science Foundation of China (NSFC) (41571516)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19040500 , XDA19070502, XDA2010010402)Gansu Province Social Science Planning Project (YB063)
文摘Natural resource-management studies have become increasingly attentive to the influences of human factors. Among these,cultural biases shape people’s responses to changes in natural resource systems. Several studies have applied grid-group cultural theory to assess the effects of multiple value biases among stakeholders on natural resource management. We developed and administered a questionnaire in the Heihe River Basin(n = 364) in northwestern China to investigate the appropriateness of applying this theory in the Chinese context of natural resource management. The results revealed various cultural biases among the respondents. In descending order of prevalence, these biases were hierarchism(46.98%), individualism(26.65%), egalitarianism(18.96%), and fatalism(2.78%), with the remaining respondents(4.67%) evidencing no obvious bias. Our empirical study revealed respondents’ worldviews and the influence of sociodemographic characteristics on cultural biases, as theoretically posited. Among the variables examined, age had a positive and significant effect across all biases except individualism. The correlation of income to all cultural biases was consistently negative. Only education had a negative and significant effect across all biases. Women were found to adhere to egalitarianism, whereas men adhered to individualism and hierarchism. Thus, grid-group cultural theory was found to be appropriate in the Chinese context, with gender, age, education, and income evidently accounting for cultural biases. Relationships between environmental attitudes and cultural biases conformed with the hypothesis advanced by grid-group cultural theory. This finding may be of value in explaining individuals’ environmental attitudes and facilitating the development and implementation of natural resource-management policies.
基金supported by the Chinese Science Academy STS Program: Natural Resources Balance Sheet Research and Application (KFJ-EW-STS-001)National Natural Science Funds Key Project (Grant No. 91125019)National Natural Science Youth Foundation (Grant No. 41401645)
文摘The Third Plenary Session of the 18 th Central Committee of the Communist Party of China has proposed an important national strategic decision: to explore and establish the balance sheet of natural resources, to implement leaders’ of-office auditing system about natural resources assets. Water is one of the most essential nature resources of human beings; water resources accounting, as an important water resources management tool, is an essential part of compiling the natural resources balance sheet. In this paper, we provide a summary of the historic evolution of water resources accounting and analyze its application in some typical countries. Although water resources accounting and water resources balance sheet reflect different implications and focus, both require water resources accounts as the basis in system establishment.
基金funded by the Gansu Provincial Science and Technology Plan Project,Innovation Base and Talent Project(Project Number:21JR1RA284).
文摘Using hyperspectral data collected in January and June 2022 from the Sha River,the concentrations of total nitrogen(TN)and total phosphorus(TP)were estimated using the differential method.The results indicate that the optimal bands for estimation vary monthly due to temperature fluctuations.In the TN model,the power function model at 586 nm in January exhibited the strongest fit,yielding a fit coefficient(R2)of 0.95 and F-value of 164.57 at a significance level(p)of less than 0.01.Conversely,the exponential model at 477 nm in June provided the best fit,with R2=0.93 and F=80.95 at p<0.01.In the TP model,the exponential model fit of the differential values at 851 nm with TP in January produced the best results,with R2=0.78 and F=20.61.However,the overall fit in June outperformed that in January.Specifically,the quadratic and linear model fits of the differential values at 824 and 863 nm with TP achieved R2=0.96 and F-values of 34.42 and 203.34,respectively.
文摘Folk activities are the most representative form of regional culture,the humanistic care,homeland affection and festival customs that run through them are all vivid and true embodiments of local life.The folk custom activity of"Zhang and Li combined households"is a living inheritance of the historical fact of Mongolian-Han fusion in Taomin region.It takes Shehuo(festival entertainment)as the carrier,and uses rich forms of performance to recognize relatives and worship ancestors.At the same time,as a kind of entertainment and catharsis,it also carries the social function of folk culture,such as maintaining and connecting the emotions between the ethnic groups and neighbors,etc.On the basis of field investigation,this paper deeply describes the folk custom event of"Zhang and Li combined households",shows the whole picture of the grand festival,and discusses the ancestral memory,identifies and ethnic integration process of"Zhang and Li combined households"as a cultural phenomenon.
基金supported by the National Natural Science Fundation of China(71561017)the Science and Technology Plan of Gansu Province(1606RJZA041)+1 种基金the Youth Plan of Academic Talent of Lanzhou University of Finance and Economicssupported by the Fundamental Research Funds for the Central Universities(HUST2015QT005)
文摘In this article, we study the existence of collision local time of two indepen- dent d-dimensional fractional Ornstein-Uhlenbeck processes X＋^H1 and Xt^H2 with different parameters Hi ∈ （0, 1）,i = 1, 2. Under the canonical framework of white noise analysis, we characterize the collision local time as a Hida distribution and obtain its＇ chaos expansion. Key words Collision local time; fractional Ornstein-Uhlenbeck processes; generalized white noise functionals; choas expansion
基金Supported by Social Science Fund Project of Hunan Province(16YBA155)
文摘Based on Chinese provincial panel data from 2003 to 2014,the spatial dependence between the environment regulation and carbon emissions is tested by spatial autocorrelation analysis. Besides,spatial lag model and spatial error model are built to empirically test the marginal effect of environmental regulation on carbon emissions and its spatial effect. The result shows that the influence trajectory of environmental regulation on carbon emissions performances inverted ＂ U＂ type. It is ＂ green paradox effect＂ before the inflection point and ＂ reversed transmission reduction effect＂ after the inflection point. Moreover,the carbon emissions show significant spatial spillover effect. In order to achieve the desired effect of environmental regulation and promote carbon reduction,we should increase the environmental regulation intensity reasonably,select rational environmental regulation policy tools,and sufficiently consider the spatial spillover effect of carbon emissions.
基金supported by General Research on Social Sciences of Ministry of Education of China (Granted No.12YJAZH110)Chinese Natural Science Foundation (No.41171116)the National Natural Science Foundation of China (No. 40971291)
文摘The security and quality of the livelihood of farmers is of paramount concern in rural areas of China. Livelihood stability would force the related polity to act coordinately while eradicating poverty and promoting resource sustainability. For this study, the livelihood approach was used as a framework of analysis that is based upon Sustainable Livelihoods Framework, the core of which is livelihood assets. Livelihood capitals provide substantial contributions to the well-being of numerous rural dwellers. However, the level and degree of reliance on livelihood capital differ across households. Factors that contribute to the economic reliance of households on a particular economic activity in general and on livelihood capital in particular may vary depending upon the type of resource endowment, household demographic, and economic characteristic as well as exoge- nous factors such as markets, prices, policies, and technologies. This study identifies factors that influence a household＇s live- lihood strategy choice with a particular focus on livelihood assets. The study applies a preliminary investigation concerning the relationship between livelihood assets and livelihood strategies, that is, the allocation of assets. Environmentally augmented household livelihood assets were collected from 300 sample households within the Heihe River Basin. Results show that physical assets possess a maximum value （0.609） for farmers and human assets possess a relatively high value （0.516） fol- lowed by social assets （0.354）. Besides, financial and natural assets possess relatively low values （0.286 and 0.241, respec- tively）. An increment of one unit should reduce the occurrence of choosing non-agricultural activities for natural capital while an increment of one unit should increase the occurrence of choosing non-agricultural activities for financial capital, while other variables remain constant. Governments, therefore, should enhance funding and technological support to achieve livelihood diversity and strengthen the facility of farmers by way of establishing relevant polity. It would enable farmers and provide themselves with the ability and asset reserves to transition from agricultural production to secondary and tertiary industries in order to improve the livelihood of farmers overall.
基金Supported by the National Natural Science Foundation of China (Grant No.11726622)Scientific Research Fund of Young Teachers in Longqiao College (Grant No. LQKJ2020-01)。
文摘Let φ be a generalized Orlicz function satisfying(A0),(A1),(A2),(aInc)and(aDec). We prove that the mapping f■f^#:=supB|1/B|∫B|f(x)-fp|dx is continuous on L^φ(·)(R^n) by extrapolation. Based on this result we generalize Korn's inequality to the setting of generalized Orlicz spaces, i.e., ‖■f‖Lφ(·)(Ω)■‖Df‖Lφ(·)(Ω). Using the Calderón–Zygmund theory on generalized Orlicz spaces, we obtain that the divergence equation divu = f has a solution u ∈(W^1φ(·)(Ω)0)^n such that ‖■f‖Lφ(·)(Ω)■‖f‖Lφ(Ω).
文摘Composite fabrics based on Polytetrafluoroethylene(PTFE)polymer displays several notable properties.They are waterproof,windproof,permeable to moisture and thermally insulating at the same time.In the present study,PTFE fibers are used as raw material to make fiber membranes.The film is formed by crisscrossing interconnected fiber filaments and the related air permeability:tensile creep characteristics and other properties are tested.The results show that the pore size,thickness,and porosity of the film itself can affect the moisture permeability of the film.The water pressure resistance of the selected fabric is 8.5 kPa,and the moisture permeability is 7038 g/(m^(2)·24 h).
基金Supported by the 2018 research funding of higher education of Gansu province project[2018B-075]
文摘In this article,we investigate the longtime behavior for the following nonautonomous nonclassical parabolic equations on unbounded domain ut−∆ut−∆u+λu=f(x,u(x,t−ρ(t)))+g(x,t).Under some suitable conditions on the delay term f and the non-autonomous forcing term g,we prove the existence of uniform attractors in Banach space CH1(RN)for the multivalued process generated by non-autonomous nonclassical parabolic equations with delays in unbounded domain.
文摘In this paper, an adaptive feedback controller is proposed to achieve the finite-time stability of dynamical system. In the proposed scheme, the feedback gain of the adaptive feedback controller is automatically tuned according to the adaptation law in order to stabilize unstable fixed points of the system. Based on the Lyapunov function method and the finite-time stability theory, we get a sufficient condition for the finite-time stability. Finally, simulation results show the effectiveness and feasibility of the proposed finite-time controller.
文摘The purpose of this study was to review the results of a 20-year study in the author’s interpretation of the needs for food products and the value system that determines the market behavior of consumers in the food markets.The scientific novelty of the research is the following results:a)The author’s interpretation of the needs for food products,as consisting of three components:(1)The actual need for food(physiological need);(2)the need for emotions obtained from eating(psychological need);and(3)the need for market products that can meet the physiological needs of emotional expectations and social needs(socio-psychological and economic need);b)Interdisciplinary approach to the study of consumer behavior that led to the author’s interpretation of the value of the research methods outlined in the works of J.N.Sheth et al.,extended and supplemented in the study of Galina V.Astratova(1998);c)Identification of the fact that the importance of components in the system of values,according to the results of research,is different for different food products.This allows simulating more clearly the behavior of the consumer in the development of a marketing-mix and developing a marketing strategy based on targeting.
文摘This paper introduces the types of traditional farm tools,and analyzes the value rationality of these traditional farm tools:on the one hand,these farm tools have witnessed the farming culture,and they are also a manifestation of local culture in the Taomin area,representing the cultural characteristics and civilization progress of this area.
基金supported by the National Natural Science Foundation of China(Grant Nos.41201595,41401653,41171116)
文摘Population growth,technological change and increased consumption are considered to be the main causes of the three environmental crisis.Environmental problems which are due to population growth and technology have already caused widespread concern,and the environmental problems caused by consumption,did not get enough attention and in-depth research.Is consumption a problem? What is the environmental conflict brought about by the consumption? What factors have contributed to the growing consumers? How do the resources meet the high levels of consumption? What is the relationship between consumption and quality of life? How can we alter consumption patterns? From the water footprint theory,this paper discusses the necessity of advocacy at meeting basic human needs while reducing the consumption of water footprint low water consumption patterns,and recommended by the German Nutrition Society DGE healthy eating pattern as a reference,compared with the normal mode of Australia diet county area of Zhangye City in food consumption,water consumption and total consumption of water footprint component characteristics.
文摘In this paper, we focus on the space-inhomogeneous three-state on the one-dimension lattice, a one-phase model and a two-phase model include. By using the transfer matrices method by Endo et al., we calculate the stationary measure for initial state concrete eigenvalue. Finally we found the transfer matrices method is more effective for the three-state quantum walks than the method obtained by Kawai et al.
基金supported by the Jiangsu Provincial Science and Technology Project Basic Research Program(Natural Science Foundation of Jiangsu Province)(No.BK20211283).
文摘Optoelectronic stability of halide perovskite material in hostile conditions such as water is rather limited,preventing them from further industrial deployment.Here,we optimize and perform machine learning analysis on CH_(3)NH_(3)PbI_(3)materials with additives,solvents and post-treatment molecules using combined experimental and data-driven methods.A champion system consisting of a compatible tertiary molecular combination‘calcein+PbBr_(2)+DMSO’active at diverse surfaces is identified,delivering a large aqueous photoelectrochemical(PEC)photocurrent of 10-5A/cm^(2)and an improved aqueous stability of 92.5%.
