With the advancement of the“Double First-Class”initiative,universities are increasingly focusing on attracting top-tier talent to enhance faculty quality and strengthen academic disciplines.The blind competition for...With the advancement of the“Double First-Class”initiative,universities are increasingly focusing on attracting top-tier talent to enhance faculty quality and strengthen academic disciplines.The blind competition for high-end talent among universities reflects an overshadowing of academic values by economic considerations,neglecting the growth patterns of top talent and the development laws of higher education.This study investigates and reflects on the real-world challenges of faculty mobility in universities,aiming to provide effective guidance for managing university faculty teams.展开更多
This paper aims to explore the development strategies for subject services in university libraries within the context of the“double first-class”initiative.By examining the relationship between“double first-class”c...This paper aims to explore the development strategies for subject services in university libraries within the context of the“double first-class”initiative.By examining the relationship between“double first-class”construction and university library subject services,the study analyzes the current state of subject services,including resource development,service models,and team building.Drawing on domestic and international case studies,the paper proposes a series of targeted and practical strategies to enhance the quality of subject services in university libraries,thereby providing robust support for the advancement of the“double first-class”initiative.展开更多
Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient o...Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient overall service capacity of libraries,this paper proposed strategies and implementation paths for optimizing the service system from three aspects:the construction of the professional qualification system for librarians,the establishment of post institutions,and the construction of library culture.Long-term path:putting library human resource management into the legal track,taking the lead in local legislation,and promoting the construction of library legislation and professional qualification certification system;optimizing the personnel system,implementing hierarchical management and classified assessment for professional librarians and auxiliary librarians.Short-term path:intensive post allocation,namely,assigning the core strength in the core post,and tackling the temporary major work combining multiple forces in the form of a"working group";building an open knowledge service ecosystem,accelerate the cross-border integration of libraries and other organizations,and striving to build the core competitiveness of libraries.展开更多
Against the background of the“double first-class”construction,the training of innovative graduate talent has become an important issue in higher education.This article discusses the importance of the training of top...Against the background of the“double first-class”construction,the training of innovative graduate talent has become an important issue in higher education.This article discusses the importance of the training of top graduate innovative talent,analyzes the status of the training of top graduate innovative talent at home and abroad,and summarizes the current challenges in the training of graduate innovative talent in China.Lastly,this paper proposes relevant reform suggestions in response to problems in the training of innovative graduate talent,which provides important references for improving the quality of innovative graduate training.展开更多
The reinforced concrete(RC) structural component might suffer a great damage under close-in explosion.Different from distant explosions, blast loads generated by the close-in explosion are non-uniformly distributed on...The reinforced concrete(RC) structural component might suffer a great damage under close-in explosion.Different from distant explosions, blast loads generated by the close-in explosion are non-uniformly distributed on the structural component and may cause both local and structural failure. In this study,an experimental study was conducted to investigate the dynamic responses of RC beams under doubleend-initiated close-in explosions. The experimental results show that the distribution of blast loads generated by the double-end-initiated explosion is much more non-uniform than those generated by single-point detonation, which is caused by the self-Mach-reflection effects. A 3 D finite element model was developed and validated in LS-DYNA by employing the modified K&C model. Intensive numerical calculations were conducted to study the influences of the initiation way, scaled distance and longitudinal reinforcement ratio on the dynamic responses and failure modes of RC beams. Numerical results show that the RC beam suffers greater damage as the cylindrical explosive is detonated at its double ends than the scenario in which the cylindrical explosive is detonated at its central point. RC beams mainly suffer flexural failure and flexure-shear failure under the double-end close-in explosion, and the failure modes of RC beams change from the flexural damage to flexure-shear damage as the scaled distance or the longitudinal reinforcement ratio decreases. The direct shear failure mode is not usually observed in the double-end-initiated explosion, since the intense blast loads is basically concentrated in the midspan of RC beam, which is due to self-Mach-reflection enhancement.展开更多
The effect of initial longitudinal velocity of the tunnelled electron on the non-sequential double ionization （NSDI） process in an elliptically polarized laser field is studied by a semiclassical model. We find that...The effect of initial longitudinal velocity of the tunnelled electron on the non-sequential double ionization （NSDI） process in an elliptically polarized laser field is studied by a semiclassical model. We find that the non-zero initial longitudinal velocity has a suppressing effect on single-return collision （SRC） events in the double ionization process, more specifically, it results in an obvious reduction in the center part of the correlation momentum distributions in the direction of the major polarization axis （z axis） and makes the distribution of single-return collision in the minor polarization axis （x axis） become narrower.展开更多
The formation mechanism of an EFP(explosively formed projectile)using a double curvature liner under the overpressure effect generated by a regular oblique reflection was investigated in this paper.Based on the detona...The formation mechanism of an EFP(explosively formed projectile)using a double curvature liner under the overpressure effect generated by a regular oblique reflection was investigated in this paper.Based on the detonation wave propagation theory,the change of the incident angle of the detonation wave collision at different positions and the distribution area of the overpressure on the surface of the liner were calculated.Three dimensional numerical simulations of the formation process of the EFP with tail.as well as the ability to penetrate 45#steel were performed using LS-DYNA software,and the EFP ve locity,the penetration ability,and the forming were assessed via experiments and x_ray photographs.The experimental results coincides with those of the simulations.Results indicate that the collision of the detonation wave was controlled to be a regular oblique reflection acting on the liner by setting the di-mensions of the unit charge and maintai ning the pressure at the collision point region at more than 2.4 times the CJ detonation when the incident angle approached the cnitical angle.The distance from the liner midline to the boundary of the area within which the pressure ratio of the regular oblique reflection pressure to the qJ detonation pressure was greater than 2.5,2,and 15was approximately 0.66 mm,132 mm,and 3.3 mm,respectively.Itis noted that pressure gradient caused the liner to turn inside out in the middle to form the head of the EFP and close the two tails of the EFP at approximately 120μs.The penetration depth of the EFP into a 45#steel target exceeded 30 mm,and there was radial expansion between the head and tail of the EFP,increasing the penetration resistance of the EFP.Therefore,the structural size of the unit charge and the liner can be further optimized to reduce resist ance to increase the penetration ability of the EFP.展开更多
From the perspective of the development of world-class universities,internationalization is an essential strategic choice and external feature,and also an inevitable choice to improve the discourse power and competiti...From the perspective of the development of world-class universities,internationalization is an essential strategic choice and external feature,and also an inevitable choice to improve the discourse power and competitiveness of international higher education.In line with the national“double first-class”international development strategy of higher education,based on the cultivation of students’overall quality,the improvement of teachers’professional ability,and the development of school’s improvement of quality and efficiency,we School of Software,Northwestern Polytechnical University,explore new ideas and new measures for the cultivation of international software engineering talents,build a set of international teaching resources construction system,to form a reference standard and scheme for the cultivation of international software engineering talents.At present,we have achieved excellent results.展开更多
To build the top class of higher education by focusing on the goal of the“Double First-Class”,it needs to analyze the defect and deficiency and identify the demand for the training of the talent under the background...To build the top class of higher education by focusing on the goal of the“Double First-Class”,it needs to analyze the defect and deficiency and identify the demand for the training of the talent under the background of“Double First-Class”.Considering of those issues,it is suggested that building the curriculum system scientifically and rationally in following aspects:deepening the training objectives,professionalizing the structure and contents of the curriculum system,optimizing the content,enhancing the construction of practical education system and internationalizing the curriculum system.Also,with those aspects,a reference is provided for the cultivation of talents with innovative consciousness and ability to solve complex engineering problems under the background of the“Double First-Class”construction.展开更多
The construction of“double first-class”universities is the strategic goal of the development of Chinese universities in the new period.On the basis of fully researching the domestic“double first-class”talent train...The construction of“double first-class”universities is the strategic goal of the development of Chinese universities in the new period.On the basis of fully researching the domestic“double first-class”talent training model,this paper builds a new type of talent training model with Chinese characteristics suitable for the“double first-class”development requirements through reference,digestion,comparison and integration,hoping to further improve universities Quality of teaching.展开更多
Throughout the world＇s first-class universities, the university culture is the soul of the universities＇ survival and development, and the cultural competitiveness has become an important symbol of the core competit...Throughout the world＇s first-class universities, the university culture is the soul of the universities＇ survival and development, and the cultural competitiveness has become an important symbol of the core competitiveness of the universities. The first-class university culture is very important to the construction of the ＂double first-class＂. Therefore, our country should bring the university cultural construction into the big pattern of the ＂double first-class＂ construction, guide the construction of the university cultures with the socialist core values, strengthen the cultural confidence, inherit the Chinese excellent traditional cultures, pay attention to the rational exchange of the multicultural cultures, highlight the Chinese characteristics of the first-class university cultures, and realize the dream of the Chinese nation of a power of the higher education.展开更多
The purpose of initial orbit determination,especially in the case of angles-only data for observation,is to obtain an initial estimate that is close enough to the true orbit to enable subsequent precision orbit determ...The purpose of initial orbit determination,especially in the case of angles-only data for observation,is to obtain an initial estimate that is close enough to the true orbit to enable subsequent precision orbit determination processing to be successful.However,the classical angles-only initial orbit determination methods cannot deal with the observation data whose Earth-central angle is larger than 360°.In this paper,an improved double r-iteration initial orbit determination method to deal with the above case is presented to monitor geosynchronous Earth orbit objects for a spacebased surveillance system.Simulation results indicate that the improved double r-iteration method is feasible,and the accuracy of the obtained initial orbit meets the requirements of re-acquiring the object.展开更多
The study object is the angular output velocity of the drive shaft which is made up of two series-wound cross universal joints. We have deduced the function relation between the angular output velocity and initiative ...The study object is the angular output velocity of the drive shaft which is made up of two series-wound cross universal joints. We have deduced the function relation between the angular output velocity and initiative input angle of the drive shaft with double cross universal joints that is based on the calculation formula of the angular output velocity of a single cross universal joint, and by analyzing the relation between the two input angles. By using this function relation, the constant velocity condition of the drive shaft with double cross universal joints＂ is verified. The step-by-step searching algorithm is adopted to obtain the optimal phase angle that leads to the minimum fluctuate index of the angular output velocity in the vary velocity condition. At the same time, we worked out the maximal and minimum value of the angular output velocity, and their initiative input angle. The correctness of the function of the angular output velocity and the step-by-step search algorithm are verified by an ADAMS simulation example.展开更多
In angiosperms,floral architecture diversity reflects its significance in exploring plant evolution.Magnolia polytepala,an endemic and ancient species in China,possesses a unique multi-tepal trait.Notably,the origin a...In angiosperms,floral architecture diversity reflects its significance in exploring plant evolution.Magnolia polytepala,an endemic and ancient species in China,possesses a unique multi-tepal trait.Notably,the origin and formation of these multi-tepals are poorly understood.In this study,we investigated the origin and formation of multi-tepals from the inner floral whorl and elucidated the underlying molecular regulatory mechanisms by combining phenotypic analysis,sequencing,and molecular experiments.We found that the multi-tepals exhibited morpho-anatomical characteristics similar to normal tepals but differed from petaloid and normal stamens.The temporal dynamics of a large number of differentially expressed genes(DEGs)involved in multiple signaling(transduction)pathways contributed to multi-tepal primordia initiation during early floral differentiation.In particular,the dynamic expression of MpW OX4,MpCLE41,MpULT1,and MpKN1 might be responsible for floral meristem activation and maintenance,while MpTGA1 and MpEJ2 potentially regulated floral organ initiation.Floral homeotic genes,such as MapoAP3,contributed to subsequent organ identity specialization.We further isolated a nucleus-localized APETALA3 homolog from M.polytepala,terming it the MapoAPETALA3(MapoAP3)gene,which was expressed in almost all vegetative and reproductive tissues.Ectopically expressing MapoAP3 in Arabidopsis resulted in altered phenotypes of rosette leaves,inflorescences,and florets,particularly generating extra petals instead of undergoing homeotic organ conversion.This discovery revealed an additional function of MapoAP3 in regulating organ initiation in addition to its conserved B-function in floral architecture plasticity.In summary,the multi-tepals of M.polytepala originated from the early tepal primordia initiation event rather than stamen petalody.The formation of the multi-tepal trait was attributed to the coordinated regulation of several vital DEGs,with the MapoAP3 gene playing an important role.These results provide additional insight into the regulation underlying the floral architecture formation in ancient Magnolia species and suggest that manipulating the MapoAP3 gene may hold promising potential for genetic breeding in ornamental plants.展开更多
基金Sponsored by the Ministry of Education Humanities and Social Sciences Research Planning Fund Project(22YJA880085)the Project of the Center for Party Political Construction Research,Ministry of Industry and Information Technology(GXZY2245).
文摘With the advancement of the“Double First-Class”initiative,universities are increasingly focusing on attracting top-tier talent to enhance faculty quality and strengthen academic disciplines.The blind competition for high-end talent among universities reflects an overshadowing of academic values by economic considerations,neglecting the growth patterns of top talent and the development laws of higher education.This study investigates and reflects on the real-world challenges of faculty mobility in universities,aiming to provide effective guidance for managing university faculty teams.
基金Heilongjiang Provincial Library Work Committee Project“Double First-Class Construction Research on the Development Strategy of Subject Services in University Libraries”(2024-016-B)。
文摘This paper aims to explore the development strategies for subject services in university libraries within the context of the“double first-class”initiative.By examining the relationship between“double first-class”construction and university library subject services,the study analyzes the current state of subject services,including resource development,service models,and team building.Drawing on domestic and international case studies,the paper proposes a series of targeted and practical strategies to enhance the quality of subject services in university libraries,thereby providing robust support for the advancement of the“double first-class”initiative.
文摘Data services,knowledge services,and information services are the core service elements of university libraries in the context of the Double First-Class Initiative.Combined with the current situation of insufficient overall service capacity of libraries,this paper proposed strategies and implementation paths for optimizing the service system from three aspects:the construction of the professional qualification system for librarians,the establishment of post institutions,and the construction of library culture.Long-term path:putting library human resource management into the legal track,taking the lead in local legislation,and promoting the construction of library legislation and professional qualification certification system;optimizing the personnel system,implementing hierarchical management and classified assessment for professional librarians and auxiliary librarians.Short-term path:intensive post allocation,namely,assigning the core strength in the core post,and tackling the temporary major work combining multiple forces in the form of a"working group";building an open knowledge service ecosystem,accelerate the cross-border integration of libraries and other organizations,and striving to build the core competitiveness of libraries.
基金Foundation for Development Research of Disciplines of China University of Geosciences(Beijing)(2022XK218 and 2023XK110)。
文摘Against the background of the“double first-class”construction,the training of innovative graduate talent has become an important issue in higher education.This article discusses the importance of the training of top graduate innovative talent,analyzes the status of the training of top graduate innovative talent at home and abroad,and summarizes the current challenges in the training of graduate innovative talent in China.Lastly,this paper proposes relevant reform suggestions in response to problems in the training of innovative graduate talent,which provides important references for improving the quality of innovative graduate training.
基金supported by the National Natural Science Foundations of China(Nos. 51622812, and 51427807)National Basic Research Program of China(No. 2015CB058003)China Postdoctoral Science Foundation(No. 2017M613379)
文摘The reinforced concrete(RC) structural component might suffer a great damage under close-in explosion.Different from distant explosions, blast loads generated by the close-in explosion are non-uniformly distributed on the structural component and may cause both local and structural failure. In this study,an experimental study was conducted to investigate the dynamic responses of RC beams under doubleend-initiated close-in explosions. The experimental results show that the distribution of blast loads generated by the double-end-initiated explosion is much more non-uniform than those generated by single-point detonation, which is caused by the self-Mach-reflection effects. A 3 D finite element model was developed and validated in LS-DYNA by employing the modified K&C model. Intensive numerical calculations were conducted to study the influences of the initiation way, scaled distance and longitudinal reinforcement ratio on the dynamic responses and failure modes of RC beams. Numerical results show that the RC beam suffers greater damage as the cylindrical explosive is detonated at its double ends than the scenario in which the cylindrical explosive is detonated at its central point. RC beams mainly suffer flexural failure and flexure-shear failure under the double-end close-in explosion, and the failure modes of RC beams change from the flexural damage to flexure-shear damage as the scaled distance or the longitudinal reinforcement ratio decreases. The direct shear failure mode is not usually observed in the double-end-initiated explosion, since the intense blast loads is basically concentrated in the midspan of RC beam, which is due to self-Mach-reflection enhancement.
基金Project supported by the National Natural Science Foundation of China (Grant Nos. 11074026 and 11074155)the Program for New Century Excellent Talents in University of the Ministry of Education of China (Grant No. NCET-08-0883)
文摘The effect of initial longitudinal velocity of the tunnelled electron on the non-sequential double ionization （NSDI） process in an elliptically polarized laser field is studied by a semiclassical model. We find that the non-zero initial longitudinal velocity has a suppressing effect on single-return collision （SRC） events in the double ionization process, more specifically, it results in an obvious reduction in the center part of the correlation momentum distributions in the direction of the major polarization axis （z axis） and makes the distribution of single-return collision in the minor polarization axis （x axis） become narrower.
基金The work presented in this paper has been supported by the science foundation(YT20-01-02)of Nanjing Vocational University of Industry Technology and the National Science Foundation of China under NO.11802141.
文摘The formation mechanism of an EFP(explosively formed projectile)using a double curvature liner under the overpressure effect generated by a regular oblique reflection was investigated in this paper.Based on the detonation wave propagation theory,the change of the incident angle of the detonation wave collision at different positions and the distribution area of the overpressure on the surface of the liner were calculated.Three dimensional numerical simulations of the formation process of the EFP with tail.as well as the ability to penetrate 45#steel were performed using LS-DYNA software,and the EFP ve locity,the penetration ability,and the forming were assessed via experiments and x_ray photographs.The experimental results coincides with those of the simulations.Results indicate that the collision of the detonation wave was controlled to be a regular oblique reflection acting on the liner by setting the di-mensions of the unit charge and maintai ning the pressure at the collision point region at more than 2.4 times the CJ detonation when the incident angle approached the cnitical angle.The distance from the liner midline to the boundary of the area within which the pressure ratio of the regular oblique reflection pressure to the qJ detonation pressure was greater than 2.5,2,and 15was approximately 0.66 mm,132 mm,and 3.3 mm,respectively.Itis noted that pressure gradient caused the liner to turn inside out in the middle to form the head of the EFP and close the two tails of the EFP at approximately 120μs.The penetration depth of the EFP into a 45#steel target exceeded 30 mm,and there was radial expansion between the head and tail of the EFP,increasing the penetration resistance of the EFP.Therefore,the structural size of the unit charge and the liner can be further optimized to reduce resist ance to increase the penetration ability of the EFP.
文摘From the perspective of the development of world-class universities,internationalization is an essential strategic choice and external feature,and also an inevitable choice to improve the discourse power and competitiveness of international higher education.In line with the national“double first-class”international development strategy of higher education,based on the cultivation of students’overall quality,the improvement of teachers’professional ability,and the development of school’s improvement of quality and efficiency,we School of Software,Northwestern Polytechnical University,explore new ideas and new measures for the cultivation of international software engineering talents,build a set of international teaching resources construction system,to form a reference standard and scheme for the cultivation of international software engineering talents.At present,we have achieved excellent results.
文摘To build the top class of higher education by focusing on the goal of the“Double First-Class”,it needs to analyze the defect and deficiency and identify the demand for the training of the talent under the background of“Double First-Class”.Considering of those issues,it is suggested that building the curriculum system scientifically and rationally in following aspects:deepening the training objectives,professionalizing the structure and contents of the curriculum system,optimizing the content,enhancing the construction of practical education system and internationalizing the curriculum system.Also,with those aspects,a reference is provided for the cultivation of talents with innovative consciousness and ability to solve complex engineering problems under the background of the“Double First-Class”construction.
文摘The construction of“double first-class”universities is the strategic goal of the development of Chinese universities in the new period.On the basis of fully researching the domestic“double first-class”talent training model,this paper builds a new type of talent training model with Chinese characteristics suitable for the“double first-class”development requirements through reference,digestion,comparison and integration,hoping to further improve universities Quality of teaching.
文摘Throughout the world＇s first-class universities, the university culture is the soul of the universities＇ survival and development, and the cultural competitiveness has become an important symbol of the core competitiveness of the universities. The first-class university culture is very important to the construction of the ＂double first-class＂. Therefore, our country should bring the university cultural construction into the big pattern of the ＂double first-class＂ construction, guide the construction of the university cultures with the socialist core values, strengthen the cultural confidence, inherit the Chinese excellent traditional cultures, pay attention to the rational exchange of the multicultural cultures, highlight the Chinese characteristics of the first-class university cultures, and realize the dream of the Chinese nation of a power of the higher education.
文摘The purpose of initial orbit determination,especially in the case of angles-only data for observation,is to obtain an initial estimate that is close enough to the true orbit to enable subsequent precision orbit determination processing to be successful.However,the classical angles-only initial orbit determination methods cannot deal with the observation data whose Earth-central angle is larger than 360°.In this paper,an improved double r-iteration initial orbit determination method to deal with the above case is presented to monitor geosynchronous Earth orbit objects for a spacebased surveillance system.Simulation results indicate that the improved double r-iteration method is feasible,and the accuracy of the obtained initial orbit meets the requirements of re-acquiring the object.
文摘The study object is the angular output velocity of the drive shaft which is made up of two series-wound cross universal joints. We have deduced the function relation between the angular output velocity and initiative input angle of the drive shaft with double cross universal joints that is based on the calculation formula of the angular output velocity of a single cross universal joint, and by analyzing the relation between the two input angles. By using this function relation, the constant velocity condition of the drive shaft with double cross universal joints＂ is verified. The step-by-step searching algorithm is adopted to obtain the optimal phase angle that leads to the minimum fluctuate index of the angular output velocity in the vary velocity condition. At the same time, we worked out the maximal and minimum value of the angular output velocity, and their initiative input angle. The correctness of the function of the angular output velocity and the step-by-step search algorithm are verified by an ADAMS simulation example.
基金supported by grants from the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.KYCX19_1080)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)the Doctorate Fellowship Foundation of Nanjing Forestry University。
文摘In angiosperms,floral architecture diversity reflects its significance in exploring plant evolution.Magnolia polytepala,an endemic and ancient species in China,possesses a unique multi-tepal trait.Notably,the origin and formation of these multi-tepals are poorly understood.In this study,we investigated the origin and formation of multi-tepals from the inner floral whorl and elucidated the underlying molecular regulatory mechanisms by combining phenotypic analysis,sequencing,and molecular experiments.We found that the multi-tepals exhibited morpho-anatomical characteristics similar to normal tepals but differed from petaloid and normal stamens.The temporal dynamics of a large number of differentially expressed genes(DEGs)involved in multiple signaling(transduction)pathways contributed to multi-tepal primordia initiation during early floral differentiation.In particular,the dynamic expression of MpW OX4,MpCLE41,MpULT1,and MpKN1 might be responsible for floral meristem activation and maintenance,while MpTGA1 and MpEJ2 potentially regulated floral organ initiation.Floral homeotic genes,such as MapoAP3,contributed to subsequent organ identity specialization.We further isolated a nucleus-localized APETALA3 homolog from M.polytepala,terming it the MapoAPETALA3(MapoAP3)gene,which was expressed in almost all vegetative and reproductive tissues.Ectopically expressing MapoAP3 in Arabidopsis resulted in altered phenotypes of rosette leaves,inflorescences,and florets,particularly generating extra petals instead of undergoing homeotic organ conversion.This discovery revealed an additional function of MapoAP3 in regulating organ initiation in addition to its conserved B-function in floral architecture plasticity.In summary,the multi-tepals of M.polytepala originated from the early tepal primordia initiation event rather than stamen petalody.The formation of the multi-tepal trait was attributed to the coordinated regulation of several vital DEGs,with the MapoAP3 gene playing an important role.These results provide additional insight into the regulation underlying the floral architecture formation in ancient Magnolia species and suggest that manipulating the MapoAP3 gene may hold promising potential for genetic breeding in ornamental plants.
