This paper is an overview of the practical teaching system of engineering management,applied training direction,and the current situation of practical teaching practice in engineering management.This paper mainly disc...This paper is an overview of the practical teaching system of engineering management,applied training direction,and the current situation of practical teaching practice in engineering management.This paper mainly discusses the new ideas of practical teaching reforms in engineering management courses,and it is hoped that the contents in this paper can provide some help in improving practical teaching of engineering management teachers.展开更多
Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and ...Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and practical skills.This paper analyzes the problems existing in the practical teaching of this major and puts forward some approaches to the construction of practical teaching of resource-based major from the aspects of content system construction of practical teaching of resource recycling major,deep cooperation between schools and enterprises,construction of dual-teacher teams,and integration teaching of industry-university-research competition.It has effectively improved the training quality of applied talents in the resource recycling major.展开更多
Deepening the integration of industryand educationand school-enterprise cooperation are effective waysto cultivate high-quality applied talents.It has become an essentialdemand for social and economic development and ...Deepening the integration of industryand educationand school-enterprise cooperation are effective waysto cultivate high-quality applied talents.It has become an essentialdemand for social and economic development and an inevitable trend for applied undergraduatescolleges.In view of this,based on the development strategy of national and local integration of industry and education and the demand for talents in the human resources industry,this article takes human resource management as an example,combined with the current situation of industry and education integration of applied undergraduate human resource management,and explores its products from the perspective of one course and two teachers.It also proposes a guarantee mechanism for integratingindustryand education from the aspects of top-level guarantee,multiple evaluations,teaching co-management,and teacher incentives.It is hoped to establishan application-oriented undergraduate human resource management professional industryand education implementation systemand promote the deep integration of applied undergraduate industry and education.展开更多
Against the backdrop of the deep integration of“AI+Education,”this study focuses on the translation teaching of Applied English in higher vocational colleges,aiming to address the practical challenges in current tea...Against the backdrop of the deep integration of“AI+Education,”this study focuses on the translation teaching of Applied English in higher vocational colleges,aiming to address the practical challenges in current teaching,such as the lag in AI application,the insufficient role transformation of teachers,and the weak digital literacy of students.By constructing an innovative“teacher-student-AI”interactive teaching model and a three-level process-oriented evaluation system,the research explores the practical path of AI-assisted translation teaching in pre-translation,in-translation,and post-translation stages.Through literature research,action research,and case analysis,the study summarizes standardized teaching templates for different professional scenarios and verifies the effectiveness of the teaching model.The results show that this reform can significantly improve students’digital literacy and autonomous learning ability,providing a replicable experience for AI-assisted teaching in higher vocational education and promoting the transformation of translation teaching from“knowledge acquisition”to“competence enhancement.”展开更多
Applied undergraduate universities are an important component of China’s higher education system,aimed at cultivating applied and versatile talents.Their adherence to the integration of industry and education and the...Applied undergraduate universities are an important component of China’s higher education system,aimed at cultivating applied and versatile talents.Their adherence to the integration of industry and education and the coordinated innovation of ideological and political education is not only a strategic choice to respond to the fundamental task of national moral education,but also a key path to solving the talent paradox of“strong skills,weak literacy.”This article is based on the current situation of the integration of industry and education and the development of ideological and political education in application-oriented undergraduate universities.It deeply analyzes the collaborative mechanism and practical difficulties between the two in terms of goals,processes,and resources.It innovatively proposes a strategy for the coordinated development of ideological and political education in application-oriented undergraduate universities under the background of industry-education integration,which has important practical significance for achieving the organic unity of the education chain,industry chain,and talent chain of application-oriented universities.展开更多
In this article,some new developments in the field of applied linguistics are summarized.In addition,it is illustrated that researchers’epistemology determines their methodology.And their research conclusions are als...In this article,some new developments in the field of applied linguistics are summarized.In addition,it is illustrated that researchers’epistemology determines their methodology.And their research conclusions are also led by their epistemology.It is proposed that a critical,bio-social paradigm be taken in the field of applied linguistics.展开更多
Intact rock-like specimens and specimens that include a single, smooth planar joint at various angles are prepared for split Hopkinson pressure bar（SHPB） testing. A buffer pad between the striker bar and the inciden...Intact rock-like specimens and specimens that include a single, smooth planar joint at various angles are prepared for split Hopkinson pressure bar（SHPB） testing. A buffer pad between the striker bar and the incident bar of an SHPB apparatus is used to absorb some of the shock energy. This can generate loading rates of 20.2-4627.3 GPa/s, enabling dynamic peak stresses/strengths and associated failure patterns of the specimens to be investigated. The effects of the loading rate and angle of load applied on the dynamic peak stresses/strengths of the specimens are examined. Relevant experimental results demonstrate that the failure pattern of each specimen can be classified as four types： Type A, integrated with or without tiny flake-off; Type B, slide failure; Type C, fracture failure; and Type D, crushing failure. The dynamic peak stresses/strengths of the specimens that have similar failure patterns increase linearly with the loading rate, yielding high correlations that are evident on semi-logarithmic plots. The slope of the failure envelope is the smallest for slide failure, followed by crushing failure, and that of fracture failure is the largest. The magnitude of the plot slope of the dynamic peak stress against the loading rate for the specimens that are still integrated after testing is between that of slide failure and crushing failure. The angle of application has a limited effect on the dynamic peak stresses/strengths of the specimens regardless of the failure pattern, but it affects the bounds of the loading rates that yield each failure pattern, and thus influences the dynamic responses of the single jointed specimen. Slide failure occurs at the lowest loading rate of any failure, but can only occur in single jointed specimen that allows sliding.Crushing failure is typically associated with the largest loading rate, and fracture failure may occur when the loading rate is between the boundaries for slide failure and crushing failure.展开更多
The concept of core collection(CC) provides a new way of management and utilization of plant germplasm resources. In this study, an integrated applied core collection(IACC) of soybean was developed based on evaluation...The concept of core collection(CC) provides a new way of management and utilization of plant germplasm resources. In this study, an integrated applied core collection(IACC) of soybean was developed based on evaluation data for desirable agronomic and nutritional traits of available soybean germplasm resources including accessions with cold tolerance, drought tolerance, salt tolerance, soybean cyst nematode resistance, soybean mosaic virus resistance, high protein content, and high fat content. The newly formed collection encompasses accessions with high genetic diversity and desirable agronomic traits. The genetic diversity of the newly formed IACC was compared with that of the established mini core collection(MCC) of soybean with the aid of simple sequence repeat(SSR) markers and phenotypic traits. The results showed that at the molecular level, soybean IACC harbored a similar level of genetic diversity as the established MCC, and that at the phenotypic level the IACC encompasses more accessions with desirable traits than does the established MCC. The development of soybean IACC lays a foundation for breeding projects to meet different objectives in different eco-regions.展开更多
Physical geography is a basic research subject of natural sciences. Its research object is the natural environment which is closely related to human living and development, and China’s natural environment is complex ...Physical geography is a basic research subject of natural sciences. Its research object is the natural environment which is closely related to human living and development, and China’s natural environment is complex and diverse. According to national needs and regional development, physical geographers have achieved remarkable achievements in applied basis and applied research, which also has substantially contributed to the planning of national economic growth and social development, the protection of macro ecosystems and resources, and sustainable regional development. This study summarized the practice and application of physical geography in China over the past 70 years in the following fields: regional differences in natural environments and physical regionalization;land use and land cover changes;natural hazards and risk reduction;process and prevention of desertification;upgrading of medium-and low-yield fields in the Huang-Huai-Hai region;engineering construction in permafrost areas;geochemical element anomalies and the prevention and control of endemic diseases;positioning and observation of physical geographical elements;and identification of geospatial differentiation and geographical detectors. Furthermore, we have proposed the future direction of applied research in the field of physical geography.展开更多
This paper studies the critical behaviours and magnetic properties of three-dimensional bond and anisotropy dilution Blume-Capel model （BCM） in the presence of an applied field within the effective field theory. The...This paper studies the critical behaviours and magnetic properties of three-dimensional bond and anisotropy dilution Blume-Capel model （BCM） in the presence of an applied field within the effective field theory. The trajectory of tricritical point, reentrant transitions and degenerate patterns of anisotropy are obtained both for the bond and the anisotropy dilutions. The global phase diagrams demonstrate unusually reentrant phenomena. The temperature dependences of magnetization curves undergo remarkable spin glass behaviour at low temperatures, and transform from ferromagnetism to paramagnetism at high temperature in applied fields. Temperature dependence of magnetic susceptibility curve is in qualitative agreement with experimental result.展开更多
The effects of surface state and applied stress on the stress corrosion cracking （SCC） behaviors of thermally treated （TT） Alloy 690 in 10 wt% NaOH solution with 100 mg/L litharge at 330 ℃ were investigated using...The effects of surface state and applied stress on the stress corrosion cracking （SCC） behaviors of thermally treated （TT） Alloy 690 in 10 wt% NaOH solution with 100 mg/L litharge at 330 ℃ were investigated using C-ring samples with four kinds of surface states and two different stress levels. Sample outer surfaces of the first three kinds were ground to 400 grit （ground）, shot-peened （SP） and electro-polished （EP） and the last one was used as the as-received state. Two samples of every kind were stressed to 100% and 200% yield stress of Alloy 690TT, respectively. The results showed that the oxide film consisted of three layers whereas continuous layer rich in Cr was not found. The poor adhesive ability indicated that the oxide film could not protect the matrix from further corrosion. Lead was found in the oxide film and the oxides at the crack paths and accelerated the dissolution of thermodynamically unstable Cr in these locations and also in the matrix. The crack initiation and propagation on Alloy 690TT were effectively retarded by SP and EP treatments but were enhanced by grinding treatment, compared with the cracks on the as-received surface. The cracking severity was also enhanced by increasing the externally applied stress. The accelerated dissolution of Cr and the local tensile stress concentration in the near-surface layer caused by cold-working and higher applied stress reduced the SCC-resistance of Alloy 690TT in the studied solution.展开更多
The ultraviolet（UV） photoresponses of ZnO nanorods directly grown on and between two micro Au-electrodes by using electric-field-assisted wet chemical method are measured comprehensively under different conditions, ...The ultraviolet（UV） photoresponses of ZnO nanorods directly grown on and between two micro Au-electrodes by using electric-field-assisted wet chemical method are measured comprehensively under different conditions, including ambient environment, applied bias voltage, gate voltage and temperature. Experimental results indicate that the photoresponses of the ZnO nanorods can be modulated by surface oxygen adsorptions, applied voltages, as well as temperatures. A model taking into account both surface adsorbed oxygen and electron-hole activities inside ZnO nanorods is proposed. The enhancement effect of the bias voltage on photoresponse is also analyzed. Experimental results shows that the UV response time（to 63%） of ZnO nanorods in air and at 59°C could be shortened from 34.8 s to 0.24 s with a bias of 4 V applied between anode and cathode.展开更多
Genetic diversity of 158 accessions of an applied core collection of adzuki bean （Vigna angularis） and 18 wild genotypes were assessed by using 85 microsatellite markers. With an average of 5.81 alleles per locus, 4...Genetic diversity of 158 accessions of an applied core collection of adzuki bean （Vigna angularis） and 18 wild genotypes were assessed by using 85 microsatellite markers. With an average of 5.81 alleles per locus, 493 alleles were detected, and their distribution frequencies lower than 5% accounted for 73.02% of the total number. The distributions of alleles between the cultivated and the wild adzuki bean germplasm are different, with a higher allelic diversity in the wild germplasm than that of the cultivated ones. An obvious genetic differentiation was also observed between the wild and the cultivated adzuki beans, and SSR markers may be useful in study identification and classification of them. Among cultivated adzuki bean, the genetic similarity coefficient varied from 0.366 to 0.939. Genetic structure analysis can clearly separate the wild genotypes from the cultivated adzuki bean, and also can divide the cultivated ones into different populations, as these populations are closely agreeable with the ecological regions where they originally grow. The results of this study will be useful in arranging local breeding programs, especially in the aspect of parental combinations or identification of progenies. These SSR markers can also provide important information to explain the genetic relationship between the cultivated and wild adzuki beans, and to accelerate the wild gene resources in broadening the gene pool in breeding program.展开更多
The Chinese Optics and Applied Optics Abstracts , sponsored by the Documentation andInformation Center of the Chinese Academy of Sciences, the Optical Information Networkof the Chinese Academy of Sciences and the Chan...The Chinese Optics and Applied Optics Abstracts , sponsored by the Documentation andInformation Center of the Chinese Academy of Sciences, the Optical Information Networkof the Chinese Academy of Sciences and the Changchun Institute of Optics, Fine Mechanicsand Physics of the Chinese Academy of Sciences, is one of the series of science andtechnology indexing periodicals published by the Chinese Academy of Sciences.The Chinese Optics and Applied Optics Abstracts started a quarterly publication in 1985,with the name of Chinese Science and Technology Document Catalogues: Optics andApplied Optics. It changed into a bimonthly publication with the name of Chinese Opticsand Applied Optics Abstracts in 1987. In combination with the Chinese Optics Documen-展开更多
In a three years experiment, conducted on acidic soil, four varieties of soybean [Glycine max (L) Merril] were tested to see their performance under different regimes of applied Phosphorus. The highest number of pods ...In a three years experiment, conducted on acidic soil, four varieties of soybean [Glycine max (L) Merril] were tested to see their performance under different regimes of applied Phosphorus. The highest number of pods was given by the cultivar Bragg, followed by Punjab-1, Durga and JS-89-21. A similar trend was observed in the number of filled pods. On an average, the cultivar, Punjab-1, gave the maximum harvest index, followed closely by Bragg. Both the cultivars, Durga and JS-89-21, had lower harvest index. The application of P fertilizer significantly increased the harvest index up to 60 kg·P·ha–1. The Highest yield of grains was given by the variety ‘Bragg’ (1630 kg·ha–1), followed by Punjab-1, JS-89-21 and Durga, which gave the yields of 1510, 1470 and 880 kg·ha–1, respectively. Highest N, P and K removal was found by the cultivar Bragg, followed by Punjab-1, JS-89-21 and Durga cultivars. The uptake of nutrients was significantly related to the total biomass produced by a cultivar (r = 0.8125), showing a yield predictability of 66.0%. The increase in uptake of N, P and K, respectively, with the application of 60 kg·P·ha–1 over no P was;245.3, 159.4 and 158.3% in case of Bragg, 101.5%, 73.8% and 44.6% in case of Durga, 182.2%, 70.6% and 63.8% in case of JS-89-21 and 164.7%, 80.0% and 97.4% in case of Punjab-1. A significant increase in soil available P was found in the plots where it was applied @ 60 kg·ha–1 continuously for three years.展开更多
Tribological behavior of Cu-15Ni-8Sn(mass fraction, %) alloy against GCr15 ring under various loads was investigated on a ring-on-block tester in oil lubrication. The results showed that the wear rate increased slowly...Tribological behavior of Cu-15Ni-8Sn(mass fraction, %) alloy against GCr15 ring under various loads was investigated on a ring-on-block tester in oil lubrication. The results showed that the wear rate increased slowly from 1.7×10^(-7) to 9.8× 10^(-7) mm^3/mm under the load lower than 300 N, and then increased dramatically to the climax of 216×10^(-7) mm^3/mm under the load over 300 N, which indicated the transition of wear mechanism with the increase of applied load. The wear mechanism mainly was plastic deformation and abrasive wear under the load less than 300 N. As the applied load was more than 300 N, the wear mechanism of Cu-15Ni-8Sn alloy primarily was delamination wear. Besides, the transition can also be confirmed from the different morphologies of worn surface, subsurface and wear debris. It is distinctly indicated that the appearance of flaky debris at the applied load over 300 N may be a critical point for the change of wear mechanism.展开更多
New attention has been given to the resources of rare earth minerals over the last years. The natural shortage of these elements in the Earth’s crust and trade restrictions recently imposed by China, motivated the Br...New attention has been given to the resources of rare earth minerals over the last years. The natural shortage of these elements in the Earth’s crust and trade restrictions recently imposed by China, motivated the Brazilian Government to encourage new projects by inserting the exploitation of rare earths in the National Mining Plan, which deals with industry strategic issues in the country, helping to reduce current importation. The incentives can be in the choice of future targets for mineral exploration and for the development of laboratory studies and pilot scale processing tests.展开更多
文摘This paper is an overview of the practical teaching system of engineering management,applied training direction,and the current situation of practical teaching practice in engineering management.This paper mainly discusses the new ideas of practical teaching reforms in engineering management courses,and it is hoped that the contents in this paper can provide some help in improving practical teaching of engineering management teachers.
基金Shandong Province Undergraduate Teaching Reform Research Project(M2023241)Teaching and Research Project of Shandong Agricultural Engineering College(20XJNKY06,22XJKTY08,23XJSZZ01)+1 种基金Education and Scientific Research Planning Project of Shandong Provincial Education Development Promotion Association(JCHKT2024164)Jinan City School Integration Development Strategy Project(JNSX2023086)。
文摘Resource recycling science and engineering is a new interdisciplinary subject.In order to meet the needs of the development of the circular economy,it is highly necessary to improve students’innovative abilities and practical skills.This paper analyzes the problems existing in the practical teaching of this major and puts forward some approaches to the construction of practical teaching of resource-based major from the aspects of content system construction of practical teaching of resource recycling major,deep cooperation between schools and enterprises,construction of dual-teacher teams,and integration teaching of industry-university-research competition.It has effectively improved the training quality of applied talents in the resource recycling major.
基金This work is supported by the Chongqing Higher Education Teaching Reform Research Key Project(202128)Chongqing Institute of Technology Education and Teaching Reform Research Project(JY2019205).
文摘Deepening the integration of industryand educationand school-enterprise cooperation are effective waysto cultivate high-quality applied talents.It has become an essentialdemand for social and economic development and an inevitable trend for applied undergraduatescolleges.In view of this,based on the development strategy of national and local integration of industry and education and the demand for talents in the human resources industry,this article takes human resource management as an example,combined with the current situation of industry and education integration of applied undergraduate human resource management,and explores its products from the perspective of one course and two teachers.It also proposes a guarantee mechanism for integratingindustryand education from the aspects of top-level guarantee,multiple evaluations,teaching co-management,and teacher incentives.It is hoped to establishan application-oriented undergraduate human resource management professional industryand education implementation systemand promote the deep integration of applied undergraduate industry and education.
基金supported by Zhejiang Business Technology Institute Educational Reform Project(jg202520).
文摘Against the backdrop of the deep integration of“AI+Education,”this study focuses on the translation teaching of Applied English in higher vocational colleges,aiming to address the practical challenges in current teaching,such as the lag in AI application,the insufficient role transformation of teachers,and the weak digital literacy of students.By constructing an innovative“teacher-student-AI”interactive teaching model and a three-level process-oriented evaluation system,the research explores the practical path of AI-assisted translation teaching in pre-translation,in-translation,and post-translation stages.Through literature research,action research,and case analysis,the study summarizes standardized teaching templates for different professional scenarios and verifies the effectiveness of the teaching model.The results show that this reform can significantly improve students’digital literacy and autonomous learning ability,providing a replicable experience for AI-assisted teaching in higher vocational education and promoting the transformation of translation teaching from“knowledge acquisition”to“competence enhancement.”
基金The 2023 Guangdong University of Science and Technology Teaching,Science and Technology Innovation,Teaching and Learning Enhancement Project Team(GKJXXZ2023018)。
文摘Applied undergraduate universities are an important component of China’s higher education system,aimed at cultivating applied and versatile talents.Their adherence to the integration of industry and education and the coordinated innovation of ideological and political education is not only a strategic choice to respond to the fundamental task of national moral education,but also a key path to solving the talent paradox of“strong skills,weak literacy.”This article is based on the current situation of the integration of industry and education and the development of ideological and political education in application-oriented undergraduate universities.It deeply analyzes the collaborative mechanism and practical difficulties between the two in terms of goals,processes,and resources.It innovatively proposes a strategy for the coordinated development of ideological and political education in application-oriented undergraduate universities under the background of industry-education integration,which has important practical significance for achieving the organic unity of the education chain,industry chain,and talent chain of application-oriented universities.
文摘In this article,some new developments in the field of applied linguistics are summarized.In addition,it is illustrated that researchers’epistemology determines their methodology.And their research conclusions are also led by their epistemology.It is proposed that a critical,bio-social paradigm be taken in the field of applied linguistics.
基金the Science and Technology authority of Taiwan, China, for financially supporting this research under Grant No.NSC 102-2221-E-027-071-MY3
文摘Intact rock-like specimens and specimens that include a single, smooth planar joint at various angles are prepared for split Hopkinson pressure bar（SHPB） testing. A buffer pad between the striker bar and the incident bar of an SHPB apparatus is used to absorb some of the shock energy. This can generate loading rates of 20.2-4627.3 GPa/s, enabling dynamic peak stresses/strengths and associated failure patterns of the specimens to be investigated. The effects of the loading rate and angle of load applied on the dynamic peak stresses/strengths of the specimens are examined. Relevant experimental results demonstrate that the failure pattern of each specimen can be classified as four types： Type A, integrated with or without tiny flake-off; Type B, slide failure; Type C, fracture failure; and Type D, crushing failure. The dynamic peak stresses/strengths of the specimens that have similar failure patterns increase linearly with the loading rate, yielding high correlations that are evident on semi-logarithmic plots. The slope of the failure envelope is the smallest for slide failure, followed by crushing failure, and that of fracture failure is the largest. The magnitude of the plot slope of the dynamic peak stress against the loading rate for the specimens that are still integrated after testing is between that of slide failure and crushing failure. The angle of application has a limited effect on the dynamic peak stresses/strengths of the specimens regardless of the failure pattern, but it affects the bounds of the loading rates that yield each failure pattern, and thus influences the dynamic responses of the single jointed specimen. Slide failure occurs at the lowest loading rate of any failure, but can only occur in single jointed specimen that allows sliding.Crushing failure is typically associated with the largest loading rate, and fracture failure may occur when the loading rate is between the boundaries for slide failure and crushing failure.
基金supported by the State Key Basic Research and Development Plan of China (973) (2010CB125900, 2009CB118400)the Fundamental Research Funds for Excellent Young Scientists of ICS-CAAS (Grant to Y. G.)+1 种基金the State High-tech Research and Development Program (863 Program) (No. 2012AA101106)the Crop Germplasm Conservation Program (NB2010-2130135-25-05)
文摘The concept of core collection(CC) provides a new way of management and utilization of plant germplasm resources. In this study, an integrated applied core collection(IACC) of soybean was developed based on evaluation data for desirable agronomic and nutritional traits of available soybean germplasm resources including accessions with cold tolerance, drought tolerance, salt tolerance, soybean cyst nematode resistance, soybean mosaic virus resistance, high protein content, and high fat content. The newly formed collection encompasses accessions with high genetic diversity and desirable agronomic traits. The genetic diversity of the newly formed IACC was compared with that of the established mini core collection(MCC) of soybean with the aid of simple sequence repeat(SSR) markers and phenotypic traits. The results showed that at the molecular level, soybean IACC harbored a similar level of genetic diversity as the established MCC, and that at the phenotypic level the IACC encompasses more accessions with desirable traits than does the established MCC. The development of soybean IACC lays a foundation for breeding projects to meet different objectives in different eco-regions.
基金Key Project of National Natural Science Foundation of China,No.41530749, No.41842050。
文摘Physical geography is a basic research subject of natural sciences. Its research object is the natural environment which is closely related to human living and development, and China’s natural environment is complex and diverse. According to national needs and regional development, physical geographers have achieved remarkable achievements in applied basis and applied research, which also has substantially contributed to the planning of national economic growth and social development, the protection of macro ecosystems and resources, and sustainable regional development. This study summarized the practice and application of physical geography in China over the past 70 years in the following fields: regional differences in natural environments and physical regionalization;land use and land cover changes;natural hazards and risk reduction;process and prevention of desertification;upgrading of medium-and low-yield fields in the Huang-Huai-Hai region;engineering construction in permafrost areas;geochemical element anomalies and the prevention and control of endemic diseases;positioning and observation of physical geographical elements;and identification of geospatial differentiation and geographical detectors. Furthermore, we have proposed the future direction of applied research in the field of physical geography.
基金Project supported by the Education Bureau Key Natural Science Foundation of Jiangsu Province （Grant No 03KJA140117） and by the 0pen Foundation of Jiangsu Key Laboratory of Thin Film （Grant No K2022）.
文摘This paper studies the critical behaviours and magnetic properties of three-dimensional bond and anisotropy dilution Blume-Capel model （BCM） in the presence of an applied field within the effective field theory. The trajectory of tricritical point, reentrant transitions and degenerate patterns of anisotropy are obtained both for the bond and the anisotropy dilutions. The global phase diagrams demonstrate unusually reentrant phenomena. The temperature dependences of magnetization curves undergo remarkable spin glass behaviour at low temperatures, and transform from ferromagnetism to paramagnetism at high temperature in applied fields. Temperature dependence of magnetic susceptibility curve is in qualitative agreement with experimental result.
基金supported by the National Science and Technology Major Project(No. 20112x06004–009)the National Natural Science Foundation of China (No. 51025104)
文摘The effects of surface state and applied stress on the stress corrosion cracking （SCC） behaviors of thermally treated （TT） Alloy 690 in 10 wt% NaOH solution with 100 mg/L litharge at 330 ℃ were investigated using C-ring samples with four kinds of surface states and two different stress levels. Sample outer surfaces of the first three kinds were ground to 400 grit （ground）, shot-peened （SP） and electro-polished （EP） and the last one was used as the as-received state. Two samples of every kind were stressed to 100% and 200% yield stress of Alloy 690TT, respectively. The results showed that the oxide film consisted of three layers whereas continuous layer rich in Cr was not found. The poor adhesive ability indicated that the oxide film could not protect the matrix from further corrosion. Lead was found in the oxide film and the oxides at the crack paths and accelerated the dissolution of thermodynamically unstable Cr in these locations and also in the matrix. The crack initiation and propagation on Alloy 690TT were effectively retarded by SP and EP treatments but were enhanced by grinding treatment, compared with the cracks on the as-received surface. The cracking severity was also enhanced by increasing the externally applied stress. The accelerated dissolution of Cr and the local tensile stress concentration in the near-surface layer caused by cold-working and higher applied stress reduced the SCC-resistance of Alloy 690TT in the studied solution.
基金Project supported by the National Natural Science Foundation of China(Grant No.91123017)
文摘The ultraviolet（UV） photoresponses of ZnO nanorods directly grown on and between two micro Au-electrodes by using electric-field-assisted wet chemical method are measured comprehensively under different conditions, including ambient environment, applied bias voltage, gate voltage and temperature. Experimental results indicate that the photoresponses of the ZnO nanorods can be modulated by surface oxygen adsorptions, applied voltages, as well as temperatures. A model taking into account both surface adsorbed oxygen and electron-hole activities inside ZnO nanorods is proposed. The enhancement effect of the bias voltage on photoresponse is also analyzed. Experimental results shows that the UV response time（to 63%） of ZnO nanorods in air and at 59°C could be shortened from 34.8 s to 0.24 s with a bias of 4 V applied between anode and cathode.
基金supported by the Earmarked Fund for China Agriculture Research System (CARS-09)
文摘Genetic diversity of 158 accessions of an applied core collection of adzuki bean （Vigna angularis） and 18 wild genotypes were assessed by using 85 microsatellite markers. With an average of 5.81 alleles per locus, 493 alleles were detected, and their distribution frequencies lower than 5% accounted for 73.02% of the total number. The distributions of alleles between the cultivated and the wild adzuki bean germplasm are different, with a higher allelic diversity in the wild germplasm than that of the cultivated ones. An obvious genetic differentiation was also observed between the wild and the cultivated adzuki beans, and SSR markers may be useful in study identification and classification of them. Among cultivated adzuki bean, the genetic similarity coefficient varied from 0.366 to 0.939. Genetic structure analysis can clearly separate the wild genotypes from the cultivated adzuki bean, and also can divide the cultivated ones into different populations, as these populations are closely agreeable with the ecological regions where they originally grow. The results of this study will be useful in arranging local breeding programs, especially in the aspect of parental combinations or identification of progenies. These SSR markers can also provide important information to explain the genetic relationship between the cultivated and wild adzuki beans, and to accelerate the wild gene resources in broadening the gene pool in breeding program.
文摘The Chinese Optics and Applied Optics Abstracts , sponsored by the Documentation andInformation Center of the Chinese Academy of Sciences, the Optical Information Networkof the Chinese Academy of Sciences and the Changchun Institute of Optics, Fine Mechanicsand Physics of the Chinese Academy of Sciences, is one of the series of science andtechnology indexing periodicals published by the Chinese Academy of Sciences.The Chinese Optics and Applied Optics Abstracts started a quarterly publication in 1985,with the name of Chinese Science and Technology Document Catalogues: Optics andApplied Optics. It changed into a bimonthly publication with the name of Chinese Opticsand Applied Optics Abstracts in 1987. In combination with the Chinese Optics Documen-
文摘In a three years experiment, conducted on acidic soil, four varieties of soybean [Glycine max (L) Merril] were tested to see their performance under different regimes of applied Phosphorus. The highest number of pods was given by the cultivar Bragg, followed by Punjab-1, Durga and JS-89-21. A similar trend was observed in the number of filled pods. On an average, the cultivar, Punjab-1, gave the maximum harvest index, followed closely by Bragg. Both the cultivars, Durga and JS-89-21, had lower harvest index. The application of P fertilizer significantly increased the harvest index up to 60 kg·P·ha–1. The Highest yield of grains was given by the variety ‘Bragg’ (1630 kg·ha–1), followed by Punjab-1, JS-89-21 and Durga, which gave the yields of 1510, 1470 and 880 kg·ha–1, respectively. Highest N, P and K removal was found by the cultivar Bragg, followed by Punjab-1, JS-89-21 and Durga cultivars. The uptake of nutrients was significantly related to the total biomass produced by a cultivar (r = 0.8125), showing a yield predictability of 66.0%. The increase in uptake of N, P and K, respectively, with the application of 60 kg·P·ha–1 over no P was;245.3, 159.4 and 158.3% in case of Bragg, 101.5%, 73.8% and 44.6% in case of Durga, 182.2%, 70.6% and 63.8% in case of JS-89-21 and 164.7%, 80.0% and 97.4% in case of Punjab-1. A significant increase in soil available P was found in the plots where it was applied @ 60 kg·ha–1 continuously for three years.
基金Project(2016YFB0301402)supported by the National Key Research and Development Program of ChinaProject(CSU20151024)supported by the Innovation-driven Plan in Central South University,China
文摘Tribological behavior of Cu-15Ni-8Sn(mass fraction, %) alloy against GCr15 ring under various loads was investigated on a ring-on-block tester in oil lubrication. The results showed that the wear rate increased slowly from 1.7×10^(-7) to 9.8× 10^(-7) mm^3/mm under the load lower than 300 N, and then increased dramatically to the climax of 216×10^(-7) mm^3/mm under the load over 300 N, which indicated the transition of wear mechanism with the increase of applied load. The wear mechanism mainly was plastic deformation and abrasive wear under the load less than 300 N. As the applied load was more than 300 N, the wear mechanism of Cu-15Ni-8Sn alloy primarily was delamination wear. Besides, the transition can also be confirmed from the different morphologies of worn surface, subsurface and wear debris. It is distinctly indicated that the appearance of flaky debris at the applied load over 300 N may be a critical point for the change of wear mechanism.
文摘New attention has been given to the resources of rare earth minerals over the last years. The natural shortage of these elements in the Earth’s crust and trade restrictions recently imposed by China, motivated the Brazilian Government to encourage new projects by inserting the exploitation of rare earths in the National Mining Plan, which deals with industry strategic issues in the country, helping to reduce current importation. The incentives can be in the choice of future targets for mineral exploration and for the development of laboratory studies and pilot scale processing tests.
