The Advanced French course is a core subject for the major of French,and ideological and political education is an important component of its teaching.By restructuring the teaching content according to the educational...The Advanced French course is a core subject for the major of French,and ideological and political education is an important component of its teaching.By restructuring the teaching content according to the educational modules of ideological and political education,we can provide a more comprehensive and systematic educational experience.Empowered by information technology,this approach broadens the dimensions of ideological and political education in the Advanced French course.Meanwhile,the learning outcomes from the“first classroom”can be transformed into the results of the“second classroom”through social platforms such as WeChat public accounts,micro-video competitions,and innovation projects,achieving the effect of spreading Chinese culture and telling Chinese stories.By using diverse evaluation criteria,we continuously improve teaching and learning activities and innovate the teaching model of ideological and political education.展开更多
Additive manufacturing(AM)technology enables the creation of a wide variety of assemblies and complex shapes from three-dimensional model data in a bottom-up,layer-by-layer manner.Therefore,AM has revolutionized the m...Additive manufacturing(AM)technology enables the creation of a wide variety of assemblies and complex shapes from three-dimensional model data in a bottom-up,layer-by-layer manner.Therefore,AM has revolutionized the modern manufacturing industry,attracting increasing interest from both academic and industrial fields.The Rapid Manufacturing Center(RMC)of the School of Materials Science and Engineering at the Huazhong Univer-sity of Science and Technology(HUST),one of the earliest and most powerful AM research teams in China,has been engaged in AM research since 1991.Aiming to address the“stuck neck”problems of specific high-strength products for AM,the RMC has conducted full-chain research in the aspects of special materials,processes,equip-ment,and applications for AM.Moreover,it has formed a multi-disciplinary research team over the past three decades.Relevant research achievements in the AM field include winning five national awards,more than ten first prizes,and more than ten second prizes at the provincial and ministerial levels.The RMC was complimented as“the world’s most influential organization in the laser AM field in 2018”by Virtual and Physical Prototyping(an international authoritative magazine of AM).Moreover,their industrialization achievements were evaluated as“having affected countries such as Singapore,South Korea,and the United States”by an international author-itative Wohlers Report on AM.In this study,we first summarize the representative research achievements of the RMC in the AM field.These include the preparation and processing technology of high-performance polymeric,metallic,and ceramic materials for AM;advanced processing technology and software/equipment for AM;and typical AM-fabricated products and their applications.Further,we discuss the latest research achievements in cutting-edge 4D printing in terms of feedstock selection,printing processes,induction strategies,and potential ap-plications.Finally,we provide insights into the future directions of AM technology development:(ⅰ)Evolving from three-dimensional printing to multi-dimensional printing,(ⅱ)transitioning from plane slicing to curved surface slicing to woven slicing,(ⅲ)enhancing efficient formation from dot-line-sheet-volume printing,(ⅳ)shifting from single material to multi-materials AM,(ⅴ)advancing from the multiscale direction of macroscopic-mesoscopic-microscopic structures,(ⅵ)integrating material preparation with forming integration,(ⅶ)expanding from small batch to large batch.展开更多
The textile industry is constantly evolving,and advancements in technology are playing a pivotal role in shaping the development and use of textile binders.According to Reports and Insights,the global textile binder m...The textile industry is constantly evolving,and advancements in technology are playing a pivotal role in shaping the development and use of textile binders.According to Reports and Insights,the global textile binder market is expected to reach a value of USD 5.33 billion by 2032,exhibiting a healthy CAGR of 4.4%.This growth is fueled by a confluence of factors,with technological innovation at the forefront.Let's delve into how these advancements are impacting the landscape of textile binders。展开更多
This paper summarized the research advances of several commonly used alfalfa transformation technologies including Agrobacterium-mediated transforma- tion method, electroperation method, microinjection method and biol...This paper summarized the research advances of several commonly used alfalfa transformation technologies including Agrobacterium-mediated transforma- tion method, electroperation method, microinjection method and biolistic method, and introduced the latest research findings in genetic improvement of alfalfa using transformation technologies to improve the quality and increase the resistance against diseases, insects and herbicides, as well as in production of plant-based vac- cines, enzyme preparations and antibodies using transgenic alfalfa as biological reactors. In addition, the current bottleneck constraining the development of alfalfa transformation technologies and related biesafety issues were analyzed and discussed, and the application prospects and commercial value of transgenic alfalfa were p^opes~.展开更多
This article introduces the latest advances achieved by the Sichuan Vinylon Plant in the fields of maintaining the stable operation of acetylene reactors, extending the operating cycle of production equipment, adaptat...This article introduces the latest advances achieved by the Sichuan Vinylon Plant in the fields of maintaining the stable operation of acetylene reactors, extending the operating cycle of production equipment, adaptation to the composition of different natural gas feeds and enlarged scale of production facilities. And a forward-looking idea on next step of technology for manufacture of acetylene from natural gas has been set forth.展开更多
Traditional surface exposure methods,such as trenching and exploratory shaft sinking,have their own limitations and do harm to the environment.Thus,shallow drilling was applied in geological mapping to expose shallow ...Traditional surface exposure methods,such as trenching and exploratory shaft sinking,have their own limitations and do harm to the environment.Thus,shallow drilling was applied in geological mapping to expose shallow orebody and to determine the thickness of top soil layer,and then to illustrate bedrock lithology and geological boundary.It can also help to study geological structures and to reveal the orebody shape,and further to combine with rock core sampling and chemical analysis to develop the systematic method of drilling instead of trenching technology.展开更多
Wheat is one of the most important crops in China, and its genetic improvement has always been a research focus. In recent years, transgenic technology has been increasingly applied to improve the yield and quality, i...Wheat is one of the most important crops in China, and its genetic improvement has always been a research focus. In recent years, transgenic technology has been increasingly applied to improve the yield and quality, increase the resistance of disease, pest and stresses in wheat. The review pays particular attention to the current research progress on wheat transformation techniques, including expression vectors, reporter genes, selectable markers, genes of interest, explants and transformation methods. Based on this, the existing problems in wheat transformation techniques are discussed and the prospect of genetic breeding in wheat is also reviewed.展开更多
Loop-mediated isothermal amplification（LAMP） is an amplification method developed by Notomi et al and has been applied successfully for the detection of many viruses.This paper introduced the current status of LAMP ...Loop-mediated isothermal amplification（LAMP） is an amplification method developed by Notomi et al and has been applied successfully for the detection of many viruses.This paper introduced the current status of LAMP and recent developments,and the method applying in the diagnosis of animal viruses in abroad.展开更多
Interest in the possibility of storing and transporting natural gas in the form of clathrate hydrates has been increasing in recent years, particularly in some gas-importing and exporting countries.The technologies ne...Interest in the possibility of storing and transporting natural gas in the form of clathrate hydrates has been increasing in recent years, particularly in some gas-importing and exporting countries.The technologies necessary for realizing this possibility may be classified into those relevant to the four serial processes (a) the formation of a hydrate, (b) the processing (dewatering, pelletizing, etc. ) of the formed hydrate, (c) the storage and transportation of the processed hydrate, and (d) the regasification (dissociation) of the hydrate. The technological development of any of these processes is still at an early stage. For hydrate formation, for example, various rival operations have been proposed. However,many of them have never been subjected to actual tests for practical use. More efforts are required for examining the different hydrate-formation technologies and for rating them by comparison. The general design of the processing of the formed hydrate inevitably depends on both the hydrate-formation process and the storage/transportation process, hence it has a wide variability. The major uncertainty in the storage-process design lies in the as-yet unclarified utility of the "self-preservation" effect of the naturalgas hydrates. The process design as well as the relevant cost evaluation should strongly depend on whether the hydrates are well preserved at atmospheric pressure in large-scale storage facilities. The regasification process has been studied less extensively than the former processes. The state of the art of the technological development in each of the serial processes is reviewed, placing emphasis on the hydrate formation process.展开更多
Since domestic corporations firstly introduced into and implemented the Advanced Manufacturing Technology (AMT),how to scientifically evaluate the implementation effects of AMT has been an urgent problem.Through the r...Since domestic corporations firstly introduced into and implemented the Advanced Manufacturing Technology (AMT),how to scientifically evaluate the implementation effects of AMT has been an urgent problem.Through the review of for- eign relative studies,this paper constructs an indicator system used to evaluate the implementation effects of AMT.Operational performance,Organizational or managerial performance,Satisfactory performance,and Competitive performance are indicators of first level in the system,and 19 indicators of second level have been selected to estimate the implementation effects of AMT.In this study,a model based on Minkowski distance discriminance to select the specialists’ opinion was designed to evaluate the indica- tor system,and the measure’s validity and practicability was proved by a case study to a diesel engine factory.展开更多
The paper has introduced the Journal 'Advanced Technology of Electrical Engineering and Energy',presented its main journal evaluation indexes. The result indicates that the journal has made great progress in r...The paper has introduced the Journal 'Advanced Technology of Electrical Engineering and Energy',presented its main journal evaluation indexes. The result indicates that the journal has made great progress in recent years. It gives much info. about the journal to authors.展开更多
Advanced manufacturing technology(AMT)is pivotal for firms to gain manufacturing performance and com- petitive advantage.Job characteristics,as a kind of important factors affecting the implementation effects of AMT ,...Advanced manufacturing technology(AMT)is pivotal for firms to gain manufacturing performance and com- petitive advantage.Job characteristics,as a kind of important factors affecting the implementation effects of AMT ,have become the focus in the field of academy.Based on a literature review,this study refines the implementation effects of AMT into opera- tional performance,satisfaction and competitive performance,and reclassifies the job characteristics of AMT into job autonomy, job responsibility,job complexity and job significance.With a large sample of 307 equipment-manufacturing firms selected from the 2005 China International Equipment and Manufacturing Exposition,linear structural equation analysis(LIEREL)is per- formed to examine the relationships between job characteristics and the implementation effects of AMT.The results show that job re- sponsibility and job significance have positive effects on satisfaction;satisfaction is positively correlated with operational perfor- mance;operational performance positively affects competitive performance.The findings provide the guide for firms to improve satisfaction,achieve higher operational performance and further gain higher competitive by reasonable job redesign.展开更多
Recent technological advances mean that samples from animal experiments may be analysed more cheaply,more easily and with a much greater return of data than previously.Research groups are frequently faced with a choic...Recent technological advances mean that samples from animal experiments may be analysed more cheaply,more easily and with a much greater return of data than previously.Research groups are frequently faced with a choice of continuing to use established technology in which they may have made a significant investment of time and resources,and have significant amounts of reference data,or switching to new technology where reference data may be limited.Apart from cost,the choice needs to be based on a comparison between the increase in data available from future experiments by switching and the value of comparison with reference data from historical experiments analysed with earlier technology.One approach to this problem is to ensure that sufficient quantity and variety of samples are taken from each experiment and appropriately stored to allow re-establishment of a sufficiently large reference set and to avoid the need to repeat animal experiments.The establishment of ‘biobanks' of experimental material will require funding for infrastructure,consistent storage of metadata and,importantly,horizon-scanning to ensure that samples are taken appropriately for techniques which will become accessible in future.Such biobanks are a recognised resource in human medicine,where the value of samples increases as more analysis is carried out and added to the metadata.展开更多
Effects of breeding mode, feeding mode, feed and nutritional level on fattening performance of goat are summarized. Moreover, several suggestions are put forward for research direction of goat fattening technology in ...Effects of breeding mode, feeding mode, feed and nutritional level on fattening performance of goat are summarized. Moreover, several suggestions are put forward for research direction of goat fattening technology in the future.展开更多
The paper presented the statistics and analysis on papers published on the journal 'Advanced Technology of Electrical Engineering and Energy' from 1996 to 2008: the paper acceptance rate,the paper category,the...The paper presented the statistics and analysis on papers published on the journal 'Advanced Technology of Electrical Engineering and Energy' from 1996 to 2008: the paper acceptance rate,the paper category,the first author's affiliations,the top 7 first authors,the top 10 coauthors and also the journal evaluation indexes of the journal.It offers details of the journal to anyone interested,especially to our editorial board and our broad readers.展开更多
In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold rec...In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold recoveries and become ＂stay mine＂. Features of refi＇actory gold ores are： gold in micro-particles or a microscopic state that is wrapped in pyrite, presence of arsenopyrite and other sulfide minerals or disseminated in the crystal lattice of sulfide minerals; harmful impurity elements such as arsenic, carbon, mercury, antimony, copper with high content are closely related with the gold, and these elements affect the contact reaction between the gold and solvent extraction, making the recovery of the gold extraction process low. In the past 20 years, overseas countries have developed the application of the roasting oxidation method, hot acid （alkali） oxidation, bacterial oxidation and flash chlorination oxidation technology to solve this problem.Among these, biological oxidation has developed rapidly in the domestic market and gold enterprises abroad because of its low investment in infrastructure, low production costs, less environmental pollution, simple process and easy control, etc.展开更多
A dvanced Metallic Materials Research and Processing Technology Center was found in December 1998. As a unit under The College of Mechanical Engineering, the Center is an expansion of the former Cast and Composite Mat...A dvanced Metallic Materials Research and Processing Technology Center was found in December 1998. As a unit under The College of Mechanical Engineering, the Center is an expansion of the former Cast and Composite Materials Research Group, which was found in the early eighties of last century. The Center is focusing in the basic and applied research, and development of advanced metallic materials and their processing technology. It also functions as an organization展开更多
The advanced manufacturing technology of mechanical products features interaction, and high simulation, etc. In this paper, a digital geometry model for the processing is established with the aid of computer technolog...The advanced manufacturing technology of mechanical products features interaction, and high simulation, etc. In this paper, a digital geometry model for the processing is established with the aid of computer technology, so that the needs of machinery manufacturing production and precision machining can be fulfilled, and also the simulation, validation, comparison, and optimization of many plans can be implemented for ultimately finding out an optimal processing method and realizing the benefit of low cost and high quality. From two different levels of activity and parts, the configuration principle of mechanical products＇ advanced manufacturing technology is defined. Therefore, the advanced manufacturing technology for customizing different products can be derived, and also the reuse of different types of parts is realized. Finally, this is verified with an example.展开更多
基金2023 Xi’an Fanyi University-Level Education and Teaching Reform Research Project“Research on Information Technology-Based Innovative Model of Civics and Politics in the Advanced French Course”(J23B17)。
文摘The Advanced French course is a core subject for the major of French,and ideological and political education is an important component of its teaching.By restructuring the teaching content according to the educational modules of ideological and political education,we can provide a more comprehensive and systematic educational experience.Empowered by information technology,this approach broadens the dimensions of ideological and political education in the Advanced French course.Meanwhile,the learning outcomes from the“first classroom”can be transformed into the results of the“second classroom”through social platforms such as WeChat public accounts,micro-video competitions,and innovation projects,achieving the effect of spreading Chinese culture and telling Chinese stories.By using diverse evaluation criteria,we continuously improve teaching and learning activities and innovate the teaching model of ideological and political education.
基金supported by National Natural Science Foundation of China(Grant Nos.52235008,U2037203,and U2341270)Key Research and Development Plan of Hubei Province(2022BAA030).
文摘Additive manufacturing(AM)technology enables the creation of a wide variety of assemblies and complex shapes from three-dimensional model data in a bottom-up,layer-by-layer manner.Therefore,AM has revolutionized the modern manufacturing industry,attracting increasing interest from both academic and industrial fields.The Rapid Manufacturing Center(RMC)of the School of Materials Science and Engineering at the Huazhong Univer-sity of Science and Technology(HUST),one of the earliest and most powerful AM research teams in China,has been engaged in AM research since 1991.Aiming to address the“stuck neck”problems of specific high-strength products for AM,the RMC has conducted full-chain research in the aspects of special materials,processes,equip-ment,and applications for AM.Moreover,it has formed a multi-disciplinary research team over the past three decades.Relevant research achievements in the AM field include winning five national awards,more than ten first prizes,and more than ten second prizes at the provincial and ministerial levels.The RMC was complimented as“the world’s most influential organization in the laser AM field in 2018”by Virtual and Physical Prototyping(an international authoritative magazine of AM).Moreover,their industrialization achievements were evaluated as“having affected countries such as Singapore,South Korea,and the United States”by an international author-itative Wohlers Report on AM.In this study,we first summarize the representative research achievements of the RMC in the AM field.These include the preparation and processing technology of high-performance polymeric,metallic,and ceramic materials for AM;advanced processing technology and software/equipment for AM;and typical AM-fabricated products and their applications.Further,we discuss the latest research achievements in cutting-edge 4D printing in terms of feedstock selection,printing processes,induction strategies,and potential ap-plications.Finally,we provide insights into the future directions of AM technology development:(ⅰ)Evolving from three-dimensional printing to multi-dimensional printing,(ⅱ)transitioning from plane slicing to curved surface slicing to woven slicing,(ⅲ)enhancing efficient formation from dot-line-sheet-volume printing,(ⅳ)shifting from single material to multi-materials AM,(ⅴ)advancing from the multiscale direction of macroscopic-mesoscopic-microscopic structures,(ⅵ)integrating material preparation with forming integration,(ⅶ)expanding from small batch to large batch.
文摘The textile industry is constantly evolving,and advancements in technology are playing a pivotal role in shaping the development and use of textile binders.According to Reports and Insights,the global textile binder market is expected to reach a value of USD 5.33 billion by 2032,exhibiting a healthy CAGR of 4.4%.This growth is fueled by a confluence of factors,with technological innovation at the forefront.Let's delve into how these advancements are impacting the landscape of textile binders。
基金Supported by Scientific Research Fund for the Returned Overseas Chinese Scholars from the Education Ministry of China(2008)Basic and Cutting-edge Technology Research Project of Henan Province(112300410014)
文摘This paper summarized the research advances of several commonly used alfalfa transformation technologies including Agrobacterium-mediated transforma- tion method, electroperation method, microinjection method and biolistic method, and introduced the latest research findings in genetic improvement of alfalfa using transformation technologies to improve the quality and increase the resistance against diseases, insects and herbicides, as well as in production of plant-based vac- cines, enzyme preparations and antibodies using transgenic alfalfa as biological reactors. In addition, the current bottleneck constraining the development of alfalfa transformation technologies and related biesafety issues were analyzed and discussed, and the application prospects and commercial value of transgenic alfalfa were p^opes~.
文摘This article introduces the latest advances achieved by the Sichuan Vinylon Plant in the fields of maintaining the stable operation of acetylene reactors, extending the operating cycle of production equipment, adaptation to the composition of different natural gas feeds and enlarged scale of production facilities. And a forward-looking idea on next step of technology for manufacture of acetylene from natural gas has been set forth.
基金financially supported by the China Geological Survey project (grant no.12120114008101,12120113097200 and 12120113090900)
文摘Traditional surface exposure methods,such as trenching and exploratory shaft sinking,have their own limitations and do harm to the environment.Thus,shallow drilling was applied in geological mapping to expose shallow orebody and to determine the thickness of top soil layer,and then to illustrate bedrock lithology and geological boundary.It can also help to study geological structures and to reveal the orebody shape,and further to combine with rock core sampling and chemical analysis to develop the systematic method of drilling instead of trenching technology.
基金Supported by the Basic and Frontier Technology Research Programs from the Department of Science and Technology of Henan Province (072300430120)
文摘Wheat is one of the most important crops in China, and its genetic improvement has always been a research focus. In recent years, transgenic technology has been increasingly applied to improve the yield and quality, increase the resistance of disease, pest and stresses in wheat. The review pays particular attention to the current research progress on wheat transformation techniques, including expression vectors, reporter genes, selectable markers, genes of interest, explants and transformation methods. Based on this, the existing problems in wheat transformation techniques are discussed and the prospect of genetic breeding in wheat is also reviewed.
文摘Loop-mediated isothermal amplification（LAMP） is an amplification method developed by Notomi et al and has been applied successfully for the detection of many viruses.This paper introduced the current status of LAMP and recent developments,and the method applying in the diagnosis of animal viruses in abroad.
文摘Interest in the possibility of storing and transporting natural gas in the form of clathrate hydrates has been increasing in recent years, particularly in some gas-importing and exporting countries.The technologies necessary for realizing this possibility may be classified into those relevant to the four serial processes (a) the formation of a hydrate, (b) the processing (dewatering, pelletizing, etc. ) of the formed hydrate, (c) the storage and transportation of the processed hydrate, and (d) the regasification (dissociation) of the hydrate. The technological development of any of these processes is still at an early stage. For hydrate formation, for example, various rival operations have been proposed. However,many of them have never been subjected to actual tests for practical use. More efforts are required for examining the different hydrate-formation technologies and for rating them by comparison. The general design of the processing of the formed hydrate inevitably depends on both the hydrate-formation process and the storage/transportation process, hence it has a wide variability. The major uncertainty in the storage-process design lies in the as-yet unclarified utility of the "self-preservation" effect of the naturalgas hydrates. The process design as well as the relevant cost evaluation should strongly depend on whether the hydrates are well preserved at atmospheric pressure in large-scale storage facilities. The regasification process has been studied less extensively than the former processes. The state of the art of the technological development in each of the serial processes is reviewed, placing emphasis on the hydrate formation process.
文摘Since domestic corporations firstly introduced into and implemented the Advanced Manufacturing Technology (AMT),how to scientifically evaluate the implementation effects of AMT has been an urgent problem.Through the review of for- eign relative studies,this paper constructs an indicator system used to evaluate the implementation effects of AMT.Operational performance,Organizational or managerial performance,Satisfactory performance,and Competitive performance are indicators of first level in the system,and 19 indicators of second level have been selected to estimate the implementation effects of AMT.In this study,a model based on Minkowski distance discriminance to select the specialists’ opinion was designed to evaluate the indica- tor system,and the measure’s validity and practicability was proved by a case study to a diesel engine factory.
文摘The paper has introduced the Journal 'Advanced Technology of Electrical Engineering and Energy',presented its main journal evaluation indexes. The result indicates that the journal has made great progress in recent years. It gives much info. about the journal to authors.
文摘Advanced manufacturing technology(AMT)is pivotal for firms to gain manufacturing performance and com- petitive advantage.Job characteristics,as a kind of important factors affecting the implementation effects of AMT ,have become the focus in the field of academy.Based on a literature review,this study refines the implementation effects of AMT into opera- tional performance,satisfaction and competitive performance,and reclassifies the job characteristics of AMT into job autonomy, job responsibility,job complexity and job significance.With a large sample of 307 equipment-manufacturing firms selected from the 2005 China International Equipment and Manufacturing Exposition,linear structural equation analysis(LIEREL)is per- formed to examine the relationships between job characteristics and the implementation effects of AMT.The results show that job re- sponsibility and job significance have positive effects on satisfaction;satisfaction is positively correlated with operational perfor- mance;operational performance positively affects competitive performance.The findings provide the guide for firms to improve satisfaction,achieve higher operational performance and further gain higher competitive by reasonable job redesign.
基金funded by the European Cooperation in Science and Technology FA1401)which supported meetings between HS,MB and CR to discuss the ideas involvedThe UK Biotechnology and Biological Sciences Research Council(BB/M028232/1)supported local discussions between MB,CR,AT and OF
文摘Recent technological advances mean that samples from animal experiments may be analysed more cheaply,more easily and with a much greater return of data than previously.Research groups are frequently faced with a choice of continuing to use established technology in which they may have made a significant investment of time and resources,and have significant amounts of reference data,or switching to new technology where reference data may be limited.Apart from cost,the choice needs to be based on a comparison between the increase in data available from future experiments by switching and the value of comparison with reference data from historical experiments analysed with earlier technology.One approach to this problem is to ensure that sufficient quantity and variety of samples are taken from each experiment and appropriately stored to allow re-establishment of a sufficiently large reference set and to avoid the need to repeat animal experiments.The establishment of ‘biobanks' of experimental material will require funding for infrastructure,consistent storage of metadata and,importantly,horizon-scanning to ensure that samples are taken appropriately for techniques which will become accessible in future.Such biobanks are a recognised resource in human medicine,where the value of samples increases as more analysis is carried out and added to the metadata.
文摘Effects of breeding mode, feeding mode, feed and nutritional level on fattening performance of goat are summarized. Moreover, several suggestions are put forward for research direction of goat fattening technology in the future.
文摘The paper presented the statistics and analysis on papers published on the journal 'Advanced Technology of Electrical Engineering and Energy' from 1996 to 2008: the paper acceptance rate,the paper category,the first author's affiliations,the top 7 first authors,the top 10 coauthors and also the journal evaluation indexes of the journal.It offers details of the journal to anyone interested,especially to our editorial board and our broad readers.
文摘In Liaoning, Hunan, Guangxi, Guizhou, Gansu, Sichuan, Anhui, Jilin and other provinces in China, there is a wide occurrence of metal quantity over 1000 tons of refractory gold ores, principally because of low gold recoveries and become ＂stay mine＂. Features of refi＇actory gold ores are： gold in micro-particles or a microscopic state that is wrapped in pyrite, presence of arsenopyrite and other sulfide minerals or disseminated in the crystal lattice of sulfide minerals; harmful impurity elements such as arsenic, carbon, mercury, antimony, copper with high content are closely related with the gold, and these elements affect the contact reaction between the gold and solvent extraction, making the recovery of the gold extraction process low. In the past 20 years, overseas countries have developed the application of the roasting oxidation method, hot acid （alkali） oxidation, bacterial oxidation and flash chlorination oxidation technology to solve this problem.Among these, biological oxidation has developed rapidly in the domestic market and gold enterprises abroad because of its low investment in infrastructure, low production costs, less environmental pollution, simple process and easy control, etc.
文摘A dvanced Metallic Materials Research and Processing Technology Center was found in December 1998. As a unit under The College of Mechanical Engineering, the Center is an expansion of the former Cast and Composite Materials Research Group, which was found in the early eighties of last century. The Center is focusing in the basic and applied research, and development of advanced metallic materials and their processing technology. It also functions as an organization
文摘The advanced manufacturing technology of mechanical products features interaction, and high simulation, etc. In this paper, a digital geometry model for the processing is established with the aid of computer technology, so that the needs of machinery manufacturing production and precision machining can be fulfilled, and also the simulation, validation, comparison, and optimization of many plans can be implemented for ultimately finding out an optimal processing method and realizing the benefit of low cost and high quality. From two different levels of activity and parts, the configuration principle of mechanical products＇ advanced manufacturing technology is defined. Therefore, the advanced manufacturing technology for customizing different products can be derived, and also the reuse of different types of parts is realized. Finally, this is verified with an example.
