Blended teaching has emerged as a prominent subject in the recent reform and innovation of higher education.It has become imperative and guiding for colleges and universities to embrace a mixed teaching approach that ...Blended teaching has emerged as a prominent subject in the recent reform and innovation of higher education.It has become imperative and guiding for colleges and universities to embrace a mixed teaching approach that aligns with the evolving needs of education and teaching in the new era.This paper aims to provide a comprehensive overview of the research status surrounding blended teaching,encompassing fundamental issues,teaching design,practical guidance,teaching effectiveness,and evaluation.By critically examining the current challenges associated with blended teaching,this study proposes optimization strategies including enhancing student participation and interaction,promoting deep learning,improving teachers’preparedness,teaching technologies,and curriculum design capabilities,strengthening top-level design,and perfecting evaluation and incentive mechanisms.These strategies provide new directions for the reform of blended teaching.展开更多
The literature reports mainly focus on 2023-2024,and the research hotspots are mostly productivity and new quality productivity.After analysis,research in the field of fisheries is still in its early stages.Among them...The literature reports mainly focus on 2023-2024,and the research hotspots are mostly productivity and new quality productivity.After analysis,research in the field of fisheries is still in its early stages.Among them,the facilities,intelligence,and"Blue granary"of marine fisheries need to be further strengthened to provide technical support for achieving the goal of"new quality productivity"in the fishing industry in the future.展开更多
Under the vision of development for the new era,China has entered a stage of high-quality economic development and an important window period in which we have the conditions and ability to address the prominent issue ...Under the vision of development for the new era,China has entered a stage of high-quality economic development and an important window period in which we have the conditions and ability to address the prominent issue of economic development and ecological protection in a coordinated way.However,all kinds of environmental benchmark values in China are lacking and need to be constantly supplemented and improved.Therefore,exploring and putting forward a simple and efficient method for the transformation of environmental criteria into environmental standards is an important basis for the rapid establishment of relevant environmental criteria system and the effective promotion of the development of environmental standards system towards a scientific and reasonable direction.In this paper,the water environment is taken as the research object.By analyzing the research progress of environmental criteria and standards at home and abroad,and the foreign method of transforming environmental criteria into environmental standards,combined with the problems faced in the process of transforming environmental criteria into environmental standards in China,an effective method to transform China's environmental criteria into environmental standards is analyzed.After analysis and comparison,it is found that the pollution reduction accounting method could achieve their simple and efficient conversion.Under the premise of obtaining environmental criteria for certain pollutants,environmental criteria for certain pollutants could be obtained by distributing pollutants reduction costs,and accounting economic benefits after reaching standard,thus obtaining the environmental standard of this type of pollutant,which provides reference to determine the environmental standard limits of such pollutants.展开更多
Ciprofol,as a new type of short-acting intravenous anesthetic drug,belongs to the category of gamma-aminobutyric acid(GABA)receptor agonists.Its unique chemical structure,through the introduction of the cyclopropyl gr...Ciprofol,as a new type of short-acting intravenous anesthetic drug,belongs to the category of gamma-aminobutyric acid(GABA)receptor agonists.Its unique chemical structure,through the introduction of the cyclopropyl group in the isopropyl side chain of propofol,constructs a new type of chiral molecule,which significantly enhances the spatial effect,and improves the affinity for GABA receptors.Its pharmacological properties are characterized by high potency,rapid onset of action,rapid recovery,low accumulation,and minimal adverse reactions.Therefore,it has a wide range of applications in various endoscopic diagnostic and therapeutic operations,ICU sedation,and general anesthesia.In this paper,the related knowledge of ciprofol and the development of clinical application research are comprehensively sorted out and synthesized,to provide a solid theoretical basis for the rational application of ciprofol in clinical practice.At the same time,the future research direction of ciprofol will also be prospected to provide valuable references for research in related fields.展开更多
According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Const...According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Construction"emphasizes the development of circular aquaculture,active expansion of green aquaculture space in facility fisheries,multi-channel development of food sources,comprehensive improvement of the quality,efficiency,and competitiveness of facility fisheries,ensuring stable and safe supply of aquatic products,and better meeting people's needs for high-quality aquatic products and beautiful aquatic ecological environment.Since the implementation of the 14th Five Year Plan for fisheries,facility fisheries have made significant progress.In order to thoroughly implement General Secretary Xi Jinping's important discourse on new quality productivity,conduct in-depth research on the current situation and existing problems of the fishery industry,and put forward suggestions to meet the requirements of high-quality development of the fishery industry in the new era.Therefore,it is crucial to continue practicing the"revitalization of aquatic seed industry"and"big food concept",take multiple measures to"demand food from rivers,lakes,and seas",and expand aquaculture space.Through research,it has been found that research in the field of facility based fisheries is still in its developmental stage.Further exploration is needed on the current status,breeding models,and experimental demonstrations of land-based facility based fisheries,in order to provide a basis for fisheries regulatory authorities to formulate the"15th Five Year Plan"for facility based fisheries.展开更多
Carbonaceous gold mines are important refractory gold ores. The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon, organic acid and hydrocarbons. The dissolved aurocyanid...Carbonaceous gold mines are important refractory gold ores. The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon, organic acid and hydrocarbons. The dissolved aurocyanide complex is robbed by adsorption of carbonaceous matter, which is similar to activated carbon in cyanide leaching of gold. The pretreatment methods of carbonaceous gold ores were introduced, including high temperature roasting, bio-oxidation, chemical oxidation, competitive adsorption, barrier inhibition and microwave roasting. Recently, bio-oxidation was developed rapidly due to its advantages such as mild conditions, simple processes, low energy consumption and friendly environment. The known microorganisms related with bio-oxidation pretreatment mainly are chemolithotroph bacteria such as Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans. The researches on decomposing and passivating carbonaceous matter were commenced by Phanerochaete chrysosporium, Pseudomonadaceae and Streptomyces setonii. Finally, the main problems were analyzed and the application prospect of this technique was looked forward.展开更多
The present situation of study of Chinese and English navigation idioms is examined from the perspective of semiotics.Firstly,the author expounds the background of the study on navigation idioms.Secondly,the paper exp...The present situation of study of Chinese and English navigation idioms is examined from the perspective of semiotics.Firstly,the author expounds the background of the study on navigation idioms.Secondly,the paper expounds several core concepts related to research.In the end,the article summarizes the vast majority of navigation idioms from the perspective of language and cultural relations with the relevant published literature,as well as cnki.net and English journals,and rarely studies navigation idi⁃oms systematically from the perspective of semiotics.Therefore,it is necessary to carry out this study and find out the cultural simi⁃larities and differences from another perspective.展开更多
The research reviewed biological characters and nutritional value of Chenopodium quinoa and concluded status quo of domestic cultivation and problems at promotion, as wel as application prospect in order to provide re...The research reviewed biological characters and nutritional value of Chenopodium quinoa and concluded status quo of domestic cultivation and problems at promotion, as wel as application prospect in order to provide references for re-search and development of Chenopodium quinoa.展开更多
Postpartum fatigue is an important issue that threatens women’s health.The incidence of postpartum fatigue is high.Failure to intervene in time may lead to adverse outcomes such as postpartum depression,premature ter...Postpartum fatigue is an important issue that threatens women’s health.The incidence of postpartum fatigue is high.Failure to intervene in time may lead to adverse outcomes such as postpartum depression,premature termination of breastfeeding,child abuse,and low infant development.This article reviews the concepts,characteristics,related factors,adverse effects,and interventions of postpartum fatigue.The aim is to improve doctors’and nurses’awareness of on postpartum fatigue in pregnant women,enrich the research content and methods,stimulate the interest of nurses,and actively carry out targeted intervention research to prevent or reduce the occurrence of adverse outcomes.展开更多
The research status of nutrient composition, medicinal value, development and utilization and cultivation techniques of purslane was analyzed to provide reference for further development and utilization of medicinal p...The research status of nutrient composition, medicinal value, development and utilization and cultivation techniques of purslane was analyzed to provide reference for further development and utilization of medicinal plant purslane.展开更多
In recent years,due to regional pollution and deteriorating environment,combined with intense social competition and heavier life pressure,an increasing number of people are affected by lifestyle-related diseases and ...In recent years,due to regional pollution and deteriorating environment,combined with intense social competition and heavier life pressure,an increasing number of people are affected by lifestyle-related diseases and remain in a state of being sub-healthy.Therefore,health issue has been receiving unprecedented attention.展开更多
The products of ecological textile have represented nowadays the new trend ofglobal consumption and production of textile while become an important means for some countries toutilize 'green barrier' as a limit...The products of ecological textile have represented nowadays the new trend ofglobal consumption and production of textile while become an important means for some countries toutilize 'green barrier' as a limitation of import of textile products. Following the entrance ofChina into the WTO, the position of 'green barrier' becomes significantly important in the trade oftextile products. As China is a big country of textile production, speeding up the research onstandards for products of ecological textile, countering the latest situation appearing ininternational trade of textile, to take as quickly as possible responsive measures is a very urgentproblem in port, to enhancing the ability of international market competition and to promoting thestable development of foreign oriented economy.展开更多
It is of strategical significance to exploit new medicines with Chinese features and with their patented rights phytechemistry will have great prospects in this aspect. This article briefly introduces the main researc...It is of strategical significance to exploit new medicines with Chinese features and with their patented rights phytechemistry will have great prospects in this aspect. This article briefly introduces the main research fields on phytochemistry and their significance, the present research situation in China, and suggests some concrete proposals on the development of the discipline in China.展开更多
Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic s...Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic series and geological time series is the major goal of the International Commission on Stratigraphy （ICS）. Under the leadership of the ICS, the countries around the world have carried out research on the Global Standard Stratotype-section and Points （GSSPs） for the boundaries of chronostratigraphic systems. In the current International Chronostratigraphic Chart （ICC）, 65 GSSPs have been erected in the Phanerozoic Eonothem, and one has yet been erected in the Precambrian Eonothem. Based on the progress of research on stratigraphy especially that from its subcommissions, the ICS is constantly revising the ICC, and will publish a new International Stratigraphic Guide in 2020. After continual efforts and broad international cooperation of Chinese stratigraphers, 10 GSSPs within the Phanerozoic Eonothem have been approved and ratified to erect in China by the ICS and IUGS. To establish the standards for strafigraphic division and correlation of China, with the support from the Ministry of Science and Technology, the National Natural Science Foundation of China and the China Geological Survey, Chinese stratigraphers have carried out research on the establishment of Stages in China. A total of 102 stages have been defined in the ＂Regional Chronostratigraphic Chart of China （geologic time）＂, in which 59 stages were studied in depth. In 2014, the ＂Stratigraphic Chart of China＂ was compiled, with the essential contents as follows： the correlation between international chronostratigraphy and regional chronostratigraphy of China （geologic time）, the distributive status of lithostratigraphy, the characteristics of geological ages, the biostratigraphic sequence, the magnetostratigraphy, the geological events and eustatic sea-level change during every geological stage. The ＂Stratigraphical Guide of China and its Explanation （2014）＂ was also published. Chinese stratigraphers have paid much attention to stratigraphic research in south China, northeast China, north China and northwest China and they have made great achievements in special research on stratigraphy, based on the 1：1000000, 1：250000, 1：200000 and 1：50000 regional geological survey projects. Manifold new stratigraphic units were discovered and established by the regional geological surveys, which are helpful to improve the regional chronostratigraphic series of China. On the strength of the investigation in coastal and offshore areas, the status of marine strata in China has been expounded. According to the developing situation of international stratigraphy and the characteristics of Chinese stratigraphic work, the contrast relation between regional stratigraphic units of China and GSSPs will be established in the future, which will improve the application value of GSSPs and the standard of regional stratigraphic division and correlation. In addition, the study of stratigraphy of the Precambrian, terrestrial basins and orogenic belts will be strengthened, the Stratigraphic Chart of China will be improved, the typical stratigraphic sections in China will be protected and the applied study of stratigraphy in the fields of oil and gas, solid minerals, etc. will be promoted. On the ground of these actions, stratigraphic research will continue to play a great role in the social and economic development of China.展开更多
Aluminum matrix composite is one of the most attractive metal matrix composites.It is a kind of material with strong vitality emerging in response to the needs of modern scientific development.Compared with traditiona...Aluminum matrix composite is one of the most attractive metal matrix composites.It is a kind of material with strong vitality emerging in response to the needs of modern scientific development.Compared with traditional materials,aluminum matrix composites have the advantages of low density,good electric conductivity and heat conductivity,good wear resistance and oxidation resistance,high specific strength and stiffness,high temperature resistance,good heat treatment performance and flexible preparation process,which make them widely used in the fields of aviation,aerospace,and automobile.In this paper,the factors affecting the properties of aluminum matrix composites,the strengthening mechanism,classification and preparation methods of aluminum matrix composites are summarized.The research status,development direction and application prospect of aluminum matrix composites are briefly introduced.展开更多
The concept,research content and direction of biological manufacturing were elaborated in this text. The biological manufacturing progress in China,application situation,development trend and existing problems were an...The concept,research content and direction of biological manufacturing were elaborated in this text. The biological manufacturing progress in China,application situation,development trend and existing problems were analyzed,and the prospect of the development of biological manufacturing was put forward,in order to provide reference and guidance for the manufacture of biological research and industrial development.展开更多
The full name of CISRI is Central Iron&Steel Research Institute under the Ministry of Metallurgical Industry in China.It is the largest institute of metallurgical process research in China(the word"large"...The full name of CISRI is Central Iron&Steel Research Institute under the Ministry of Metallurgical Industry in China.It is the largest institute of metallurgical process research in China(the word"large"here refers to various fields,large personnel and many research projects).It includes ironmaking,steel-making,cold and hot processing of steel,metallic product,ferroalloy,refractory,automatic metallurgy control,design展开更多
1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of ...1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of traditional mineralogy,petrology,geochemistry and geophysics.It is not only an important and essential way and window to understand geological processes in depth and geological展开更多
The Network Attachment Subsystem (NASS) is introduced to the Next Generation Network (NGN) architecture to enable services independent from access networks and support nomadism for fixed terminals. The NASS is respons...The Network Attachment Subsystem (NASS) is introduced to the Next Generation Network (NGN) architecture to enable services independent from access networks and support nomadism for fixed terminals. The NASS is responsible for managing the users attached to the access network in terms of user authentication, allocation of the IP address, and location management. In NGN R1, Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN) studied the internal architecture and external interface protocols of NASS and published the relevant technical specifications. In NGN R2, TISPAN focuses on the study of mobility and nomadism as well as the ability to support various access network architectures. There still remain several issues that need further study.展开更多
基金The 2020 Guangxi Higher Education Undergraduate Teaching Reform Project“Research and Practice of Blended Course Evaluation System Based on College Students’Learning Effect”(Project number:2020JGZ116)。
文摘Blended teaching has emerged as a prominent subject in the recent reform and innovation of higher education.It has become imperative and guiding for colleges and universities to embrace a mixed teaching approach that aligns with the evolving needs of education and teaching in the new era.This paper aims to provide a comprehensive overview of the research status surrounding blended teaching,encompassing fundamental issues,teaching design,practical guidance,teaching effectiveness,and evaluation.By critically examining the current challenges associated with blended teaching,this study proposes optimization strategies including enhancing student participation and interaction,promoting deep learning,improving teachers’preparedness,teaching technologies,and curriculum design capabilities,strengthening top-level design,and perfecting evaluation and incentive mechanisms.These strategies provide new directions for the reform of blended teaching.
基金supported by the Technical system of national bulk freshwater fish industry(No.CARS-45-33)National bulk freshwater fish industry technology system Tianjin freshwater aquaculture industry technology system innovation team(No.ITTFRS2024000)+2 种基金Tianjin Science and Technology Plan Project(No.23YDTPJC00420)Central Guiding Local Science and Technology Development Funds(No.24ZYCGSN00250)Opening Foundation of Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria(No.202007 and 202105).
文摘The literature reports mainly focus on 2023-2024,and the research hotspots are mostly productivity and new quality productivity.After analysis,research in the field of fisheries is still in its early stages.Among them,the facilities,intelligence,and"Blue granary"of marine fisheries need to be further strengthened to provide technical support for achieving the goal of"new quality productivity"in the fishing industry in the future.
基金Supported by Research on Water Quality Criteria for Aquatic Organism Protection and Water Quality Standards for Optimal Control of Pollutants in the Baiyangdian Basin(20374204D).
文摘Under the vision of development for the new era,China has entered a stage of high-quality economic development and an important window period in which we have the conditions and ability to address the prominent issue of economic development and ecological protection in a coordinated way.However,all kinds of environmental benchmark values in China are lacking and need to be constantly supplemented and improved.Therefore,exploring and putting forward a simple and efficient method for the transformation of environmental criteria into environmental standards is an important basis for the rapid establishment of relevant environmental criteria system and the effective promotion of the development of environmental standards system towards a scientific and reasonable direction.In this paper,the water environment is taken as the research object.By analyzing the research progress of environmental criteria and standards at home and abroad,and the foreign method of transforming environmental criteria into environmental standards,combined with the problems faced in the process of transforming environmental criteria into environmental standards in China,an effective method to transform China's environmental criteria into environmental standards is analyzed.After analysis and comparison,it is found that the pollution reduction accounting method could achieve their simple and efficient conversion.Under the premise of obtaining environmental criteria for certain pollutants,environmental criteria for certain pollutants could be obtained by distributing pollutants reduction costs,and accounting economic benefits after reaching standard,thus obtaining the environmental standard of this type of pollutant,which provides reference to determine the environmental standard limits of such pollutants.
文摘Ciprofol,as a new type of short-acting intravenous anesthetic drug,belongs to the category of gamma-aminobutyric acid(GABA)receptor agonists.Its unique chemical structure,through the introduction of the cyclopropyl group in the isopropyl side chain of propofol,constructs a new type of chiral molecule,which significantly enhances the spatial effect,and improves the affinity for GABA receptors.Its pharmacological properties are characterized by high potency,rapid onset of action,rapid recovery,low accumulation,and minimal adverse reactions.Therefore,it has a wide range of applications in various endoscopic diagnostic and therapeutic operations,ICU sedation,and general anesthesia.In this paper,the related knowledge of ciprofol and the development of clinical application research are comprehensively sorted out and synthesized,to provide a solid theoretical basis for the rational application of ciprofol in clinical practice.At the same time,the future research direction of ciprofol will also be prospected to provide valuable references for research in related fields.
基金supported by the National Bulk Freshwater Fish Industry Technology System(CARS-45-33)Tianjin Freshwater Aquaculture Industry Technology System Innovation Team(ITTFRS20211000-005/002)+2 种基金Tianjin Science and Technology Plan Project(23YDTPJC00420)Central Guiding Local Science and Technology Development Fund(24ZYCGSN00250)Open Fund of Key Laboratory of Environmental Standards and Environmental Pollution of the Ministry of Education(202007,202105).
文摘According to the"National Modern Facility Agriculture Construction Plan(2023-2030)released by the Ministry of Agriculture and Rural Affairs,the"Special Implementation Plan for Modern Facility Fisheries Construction"emphasizes the development of circular aquaculture,active expansion of green aquaculture space in facility fisheries,multi-channel development of food sources,comprehensive improvement of the quality,efficiency,and competitiveness of facility fisheries,ensuring stable and safe supply of aquatic products,and better meeting people's needs for high-quality aquatic products and beautiful aquatic ecological environment.Since the implementation of the 14th Five Year Plan for fisheries,facility fisheries have made significant progress.In order to thoroughly implement General Secretary Xi Jinping's important discourse on new quality productivity,conduct in-depth research on the current situation and existing problems of the fishery industry,and put forward suggestions to meet the requirements of high-quality development of the fishery industry in the new era.Therefore,it is crucial to continue practicing the"revitalization of aquatic seed industry"and"big food concept",take multiple measures to"demand food from rivers,lakes,and seas",and expand aquaculture space.Through research,it has been found that research in the field of facility based fisheries is still in its developmental stage.Further exploration is needed on the current status,breeding models,and experimental demonstrations of land-based facility based fisheries,in order to provide a basis for fisheries regulatory authorities to formulate the"15th Five Year Plan"for facility based fisheries.
基金Projects(51174062,51104036)supported by the National Natural Science Foundation of ChinaProject(2012BAE06B05)supported by the National Science and Technology Support Program of China during the 12th Five-Year Plan Period+1 种基金Projects(2012AA061502,2012AA061501)supported by the National High-Tech Research and Development Program of ChinaProjects(N120602006,N110302002,N110602005)supported by Fundamental Research Funds for the Central Universities of China
文摘Carbonaceous gold mines are important refractory gold ores. The previous results demonstrate that the carbonaceous matter is mainly composed of elemental carbon, organic acid and hydrocarbons. The dissolved aurocyanide complex is robbed by adsorption of carbonaceous matter, which is similar to activated carbon in cyanide leaching of gold. The pretreatment methods of carbonaceous gold ores were introduced, including high temperature roasting, bio-oxidation, chemical oxidation, competitive adsorption, barrier inhibition and microwave roasting. Recently, bio-oxidation was developed rapidly due to its advantages such as mild conditions, simple processes, low energy consumption and friendly environment. The known microorganisms related with bio-oxidation pretreatment mainly are chemolithotroph bacteria such as Thiobacillus ferrooxidans, Thiobacillus thiooxidans and Leptospirillum ferrooxidans. The researches on decomposing and passivating carbonaceous matter were commenced by Phanerochaete chrysosporium, Pseudomonadaceae and Streptomyces setonii. Finally, the main problems were analyzed and the application prospect of this technique was looked forward.
文摘The present situation of study of Chinese and English navigation idioms is examined from the perspective of semiotics.Firstly,the author expounds the background of the study on navigation idioms.Secondly,the paper expounds several core concepts related to research.In the end,the article summarizes the vast majority of navigation idioms from the perspective of language and cultural relations with the relevant published literature,as well as cnki.net and English journals,and rarely studies navigation idi⁃oms systematically from the perspective of semiotics.Therefore,it is necessary to carry out this study and find out the cultural simi⁃larities and differences from another perspective.
基金Supported by Coarse Cereal Innovation Team of Shandong Province Modern Agricultural Technology SystemYouth Foundation of Shandong Academy of Agricultural Sciences(2014QNM09)~~
文摘The research reviewed biological characters and nutritional value of Chenopodium quinoa and concluded status quo of domestic cultivation and problems at promotion, as wel as application prospect in order to provide references for re-search and development of Chenopodium quinoa.
文摘Postpartum fatigue is an important issue that threatens women’s health.The incidence of postpartum fatigue is high.Failure to intervene in time may lead to adverse outcomes such as postpartum depression,premature termination of breastfeeding,child abuse,and low infant development.This article reviews the concepts,characteristics,related factors,adverse effects,and interventions of postpartum fatigue.The aim is to improve doctors’and nurses’awareness of on postpartum fatigue in pregnant women,enrich the research content and methods,stimulate the interest of nurses,and actively carry out targeted intervention research to prevent or reduce the occurrence of adverse outcomes.
文摘The research status of nutrient composition, medicinal value, development and utilization and cultivation techniques of purslane was analyzed to provide reference for further development and utilization of medicinal plant purslane.
基金supported by funds from the National Natural Science Foundation of China[31670701]Health Bureau of Zhejiang Province[2016KYB005]
文摘In recent years,due to regional pollution and deteriorating environment,combined with intense social competition and heavier life pressure,an increasing number of people are affected by lifestyle-related diseases and remain in a state of being sub-healthy.Therefore,health issue has been receiving unprecedented attention.
文摘The products of ecological textile have represented nowadays the new trend ofglobal consumption and production of textile while become an important means for some countries toutilize 'green barrier' as a limitation of import of textile products. Following the entrance ofChina into the WTO, the position of 'green barrier' becomes significantly important in the trade oftextile products. As China is a big country of textile production, speeding up the research onstandards for products of ecological textile, countering the latest situation appearing ininternational trade of textile, to take as quickly as possible responsive measures is a very urgentproblem in port, to enhancing the ability of international market competition and to promoting thestable development of foreign oriented economy.
文摘It is of strategical significance to exploit new medicines with Chinese features and with their patented rights phytechemistry will have great prospects in this aspect. This article briefly introduces the main research fields on phytochemistry and their significance, the present research situation in China, and suggests some concrete proposals on the development of the discipline in China.
基金supported by the Ministry of Science and Technology(Grant No.2015FY310100)the National Natural Science Foundation of China(Grant Nos.41472030)the China Geological Survey(Grant Nos.DD20160120-04,DD20160120-02,DD20160345,1212011120427,12120114026701)
文摘Scientific research and productive practice for earth history are inseparable from the accurate stratigraphic framework and time framework. Establishing the globally unified, precise and reliable chronostratigraphic series and geological time series is the major goal of the International Commission on Stratigraphy （ICS）. Under the leadership of the ICS, the countries around the world have carried out research on the Global Standard Stratotype-section and Points （GSSPs） for the boundaries of chronostratigraphic systems. In the current International Chronostratigraphic Chart （ICC）, 65 GSSPs have been erected in the Phanerozoic Eonothem, and one has yet been erected in the Precambrian Eonothem. Based on the progress of research on stratigraphy especially that from its subcommissions, the ICS is constantly revising the ICC, and will publish a new International Stratigraphic Guide in 2020. After continual efforts and broad international cooperation of Chinese stratigraphers, 10 GSSPs within the Phanerozoic Eonothem have been approved and ratified to erect in China by the ICS and IUGS. To establish the standards for strafigraphic division and correlation of China, with the support from the Ministry of Science and Technology, the National Natural Science Foundation of China and the China Geological Survey, Chinese stratigraphers have carried out research on the establishment of Stages in China. A total of 102 stages have been defined in the ＂Regional Chronostratigraphic Chart of China （geologic time）＂, in which 59 stages were studied in depth. In 2014, the ＂Stratigraphic Chart of China＂ was compiled, with the essential contents as follows： the correlation between international chronostratigraphy and regional chronostratigraphy of China （geologic time）, the distributive status of lithostratigraphy, the characteristics of geological ages, the biostratigraphic sequence, the magnetostratigraphy, the geological events and eustatic sea-level change during every geological stage. The ＂Stratigraphical Guide of China and its Explanation （2014）＂ was also published. Chinese stratigraphers have paid much attention to stratigraphic research in south China, northeast China, north China and northwest China and they have made great achievements in special research on stratigraphy, based on the 1：1000000, 1：250000, 1：200000 and 1：50000 regional geological survey projects. Manifold new stratigraphic units were discovered and established by the regional geological surveys, which are helpful to improve the regional chronostratigraphic series of China. On the strength of the investigation in coastal and offshore areas, the status of marine strata in China has been expounded. According to the developing situation of international stratigraphy and the characteristics of Chinese stratigraphic work, the contrast relation between regional stratigraphic units of China and GSSPs will be established in the future, which will improve the application value of GSSPs and the standard of regional stratigraphic division and correlation. In addition, the study of stratigraphy of the Precambrian, terrestrial basins and orogenic belts will be strengthened, the Stratigraphic Chart of China will be improved, the typical stratigraphic sections in China will be protected and the applied study of stratigraphy in the fields of oil and gas, solid minerals, etc. will be promoted. On the ground of these actions, stratigraphic research will continue to play a great role in the social and economic development of China.
基金Thanks for the support of the National Natural Science Foundation of China(51661021)Thanks for the support of Key Research and Development Projects of Gansu Province(18YF1GA061)China Postdoctoral Science Foundation(2019M653896XB).
文摘Aluminum matrix composite is one of the most attractive metal matrix composites.It is a kind of material with strong vitality emerging in response to the needs of modern scientific development.Compared with traditional materials,aluminum matrix composites have the advantages of low density,good electric conductivity and heat conductivity,good wear resistance and oxidation resistance,high specific strength and stiffness,high temperature resistance,good heat treatment performance and flexible preparation process,which make them widely used in the fields of aviation,aerospace,and automobile.In this paper,the factors affecting the properties of aluminum matrix composites,the strengthening mechanism,classification and preparation methods of aluminum matrix composites are summarized.The research status,development direction and application prospect of aluminum matrix composites are briefly introduced.
基金Supported by Shaanxi Agricultural Promotion Program(2012SNJC159NTF-H1)
文摘The concept,research content and direction of biological manufacturing were elaborated in this text. The biological manufacturing progress in China,application situation,development trend and existing problems were analyzed,and the prospect of the development of biological manufacturing was put forward,in order to provide reference and guidance for the manufacture of biological research and industrial development.
文摘The full name of CISRI is Central Iron&Steel Research Institute under the Ministry of Metallurgical Industry in China.It is the largest institute of metallurgical process research in China(the word"large"here refers to various fields,large personnel and many research projects).It includes ironmaking,steel-making,cold and hot processing of steel,metallic product,ferroalloy,refractory,automatic metallurgy control,design
基金project was jointly funded by the Funds for the program of the National Natural Science Foundation (Noes. 41572060, U1133602)Projects of YM Lab (2011)Innovation Team of Yunnan province and KMUST (2008,2012)
文摘1 Introduction In contrast,1experimental geochemistry is a young subject,but in recent years,the research on experiment of high temperature and high pressure has become an important branch in the parallel subjects of traditional mineralogy,petrology,geochemistry and geophysics.It is not only an important and essential way and window to understand geological processes in depth and geological
文摘The Network Attachment Subsystem (NASS) is introduced to the Next Generation Network (NGN) architecture to enable services independent from access networks and support nomadism for fixed terminals. The NASS is responsible for managing the users attached to the access network in terms of user authentication, allocation of the IP address, and location management. In NGN R1, Telecommunications and Internet Converged Services and Protocols for Advanced Networking (TISPAN) studied the internal architecture and external interface protocols of NASS and published the relevant technical specifications. In NGN R2, TISPAN focuses on the study of mobility and nomadism as well as the ability to support various access network architectures. There still remain several issues that need further study.
