To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on...To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province.展开更多
With the development of society,the overall development of various industries in our country is unprecedentedly prosperous.However,various damaging industries with the sole goal of profit have emerged,significantly re...With the development of society,the overall development of various industries in our country is unprecedentedly prosperous.However,various damaging industries with the sole goal of profit have emerged,significantly reducing people’s experience in basic needs such as food,clothing,housing,and transportation.Food analysis course is an essential primary subject established by colleges and universities to cultivate food quality and safety talents.In order to further ensure the food safety of society,this article mainly analyzes the teaching reform path of food analysis courses under the new situation.We hope the views in this article can provide guidelines for relevant workers.展开更多
With the rapid development of modern science and technology,artificial intelligence(AI)technology is becoming more and more mature,which has brought a profound impact on every field of human society.The new era backgr...With the rapid development of modern science and technology,artificial intelligence(AI)technology is becoming more and more mature,which has brought a profound impact on every field of human society.The new era background provides a new teaching concept for ideological and political teaching in colleges and universities.Teachers in colleges and universities should adopt a positive attitude to face the teaching change brought by new technology,update the teaching ideas in time,and adjust the teaching strategy.This paper will analyze the current situation of the integrated development of AI and ideological and political teaching and put forward corresponding teaching strategies to help train well-developed socialist successors.展开更多
Needs analysis is an essential step in planning an oral presentation course in an ESP context.This paper illustrates two important areas in the relevant needs analysis: target situation analysis and present situation ...Needs analysis is an essential step in planning an oral presentation course in an ESP context.This paper illustrates two important areas in the relevant needs analysis: target situation analysis and present situation analysis.展开更多
Objective:To demonstrate malaria situation analysis,stratification and planning for an endemic area in southern Iran.Methods:Data on health system,population,meteorological parameters, malaria cases,anopheline vectors...Objective:To demonstrate malaria situation analysis,stratification and planning for an endemic area in southern Iran.Methods:Data on health system,population,meteorological parameters, malaria cases,anopheline vectors,and control activities during 2005-2007 was obtained from Minab Health Center,Minab Meteorological Station and published documents about malaria elements in the study area.A datasheet was created in excel 2003 for analysis.Results:There were 644 health staff working in Minab District including 99 health staff in malaria control program.The health facilities are distributed as follow:1 hospital with 96 beds,23 health centers including private centers(10 in Minab city and 13 in rural area of Minab District) and 119 health houses in rural areas of Minab District.Anopheles stephensi was the dominant species in Minab District,however,Anopheles dthali,Anopheles superpictus,Anopheles fluviatilis,Anopheles multicolor,Anopheles pulcherrimus and Anopheles turkhudi can also be found in the area. Anopheles stephensi was reported susceptible to malathion,propoxur,primphos-methyl,lambdacyhalothrin permethrin and deltamethrin,and resistant to DDT and dieldrin in the area.During the study period a total of 10 665 positive cases were reported,mainly due to local transmission (99.6%).Plasmodium vivax was the main causative agent followed by Plasmodium falciparum. There were reports about drug resistance of Plasmodium falciparum in the area.Conclusions: Using different parameters,Minab was classified into 3 strata.A plan was designed based on described goal,objectives and targets.The approaches of this plan were categorized into:health education,early detection and correct treatment,and vector control.Main constraints of these approaches are population movement between Iran,Pakistan and Afghanistan;vector control challenges at district,inadequate skilled medical staff in malaria case management and weak inter-sectorial coordination for malaria control,especially in urban areas.展开更多
We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262...We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262.51 hm2.The distribution areas are narrow and limited.What's worse,it suffers from serious destruction and has been withered in large areas.Besides,according to current introduction test,it is difficult to survive in other places.In accordance with Exploring the Criteria for Endangered Categories of Bamboo Species from China put forward by Ma Naixun et al from the Research Institute of Subtropical Forestry of Chinese Academy of Forestry(RISFCAF),we propose incorporating P.intermedius S.Y.Chen into vulnerable species for protection.展开更多
The CDTF-Library is a library in Chinese-German Technical Faculty of Qingdao University of Science and Technology in Qingdao.It is very small in scale.It only occupies an area of 60 square meters with 3 reading seats ...The CDTF-Library is a library in Chinese-German Technical Faculty of Qingdao University of Science and Technology in Qingdao.It is very small in scale.It only occupies an area of 60 square meters with 3 reading seats and 5000 original German books.The resources of German in domestic are relatively few and German resources are too expensive to buy.During the past years,more and more readers made complaints,against the limited resource of audio and video materials,lack of new books,short open time and unsatisfied technical environments.展开更多
This study takes the students who intend to study for graduate students as the research object,and makes a questionnaire survey on the mathematics learning situation and learning platform of the postgraduate candidate...This study takes the students who intend to study for graduate students as the research object,and makes a questionnaire survey on the mathematics learning situation and learning platform of the postgraduate candidates.Questionnaires were distributed online and offline,and a total of 326 valid questionnaires were collected.Based on 326 questionnaires,this paper analyzes the current learning situation of mathematics in the postgraduate entrance examination and studies the strategies based on the present situation,which points out the direction for the construction of mathematics learning and communication platform based on the needs of postgraduate entrance examination.展开更多
Experimental teaching is an important part of biology teaching in middle school.In the form of questionnaire,this paper conducts a survey on some leading teachers of biology in the middle schools in the Yangjiang area...Experimental teaching is an important part of biology teaching in middle school.In the form of questionnaire,this paper conducts a survey on some leading teachers of biology in the middle schools in the Yangjiang area about the biological experiment teaching in the implementation of the new curriculum,and analyzes the results of the survey.The problems and deficiencies in the implementation of biological experiment teaching in some middle schools in this area are found,and the relevant reform measures and suggestions are put forward in order to promote the better development of biological experiment teaching in middle schools.展开更多
Ⅰ. The present Situation of Transnational Corporations’ Investment in TEDA (1 ) General situation Since its founding ten years ago, especially since 1992. TEDA has achieved encouraging successesin undertaking major ...Ⅰ. The present Situation of Transnational Corporations’ Investment in TEDA (1 ) General situation Since its founding ten years ago, especially since 1992. TEDA has achieved encouraging successesin undertaking major projects. drawing the attention of leading consortia, omnibearingly solicitingbusiness and drawing foreign capital. By September 30, 1994, TEDA had approved 2054 solely for-展开更多
The university is to train socialist builders and successors important base, and actively carry out work of party building is the core of college students' college party building work. In this paper, it analyzes the ...The university is to train socialist builders and successors important base, and actively carry out work of party building is the core of college students' college party building work. In this paper, it analyzes the importance of college students in the new era of party building work carried out elaborate, and the College Students' party building work and the reasons for the problems. It then proposes effective measures to further improve the Party building work of college students in order to better promote the new era of college students the healthy development of building work.展开更多
To some extent, college English teaching management affects the success or failure of university education. This paper analyzes the current status of research and management, the use of management to clarify the meani...To some extent, college English teaching management affects the success or failure of university education. This paper analyzes the current status of research and management, the use of management to clarify the meaning of the five elements of law, based on the induction of the one-sided understanding, setting single, formal training, and simplistic assessment of the four questions, and start from the two elements of teaching and learning around how to teach, how to learn, how assessment of the problem, explore the three management initiatives, with a view of college English teaching management plays a certain significance.展开更多
In China, the country with a large population, the number of rural residents still occupies a considerable proportion. With the development of the country, reducing the living standards of the gap between urban and ru...In China, the country with a large population, the number of rural residents still occupies a considerable proportion. With the development of the country, reducing the living standards of the gap between urban and rural areas as soon as possible, to be able to realize urban and rural integration, a new rural community management is a very good choice. In this paper, the research aims to Tsingtao li stone community the brief analysis of the present situation of community management, research on the current situation of community management problems, and put forward the community management services to long-term healthy development of the constructive Suggestions and countermeasures.展开更多
This paper adopts the research methods such as literature material method, questionnaire investigation method, expert interview method and mathematical statistics to investigate and study the conditions of fancy rope ...This paper adopts the research methods such as literature material method, questionnaire investigation method, expert interview method and mathematical statistics to investigate and study the conditions of fancy rope skipping curriculum in 22 universities in Sichuan. The research shows that the university teachers highly recognize the fancy rope skipping curriculum; construction of teaching resources should be strengthened; cultivation of the professional teaching staffs should be strengthened; in terms of teaching materials, more premium teaching materials with high pertinence and professionalism are needed; the promotion and implementation of the curriculum system of fancy rope skipping should be boosted in different steps and stages; cultivation of the professional teachers should be enlarged; related scientific research of the curriculum system of fancy rope skipping should be strengthened.展开更多
In the first half of 2007, the power industry in Shandongprovince continued to maintain a rapid growth momentum.The gross electricity consumption amounted to 121.25 TWh,14.4% higher over that in the same period of las...In the first half of 2007, the power industry in Shandongprovince continued to maintain a rapid growth momentum.The gross electricity consumption amounted to 121.25 TWh,14.4% higher over that in the same period of last year. The totalinstalled capacity reached 53.29 GW. It was expected that bythe end of 2007, the gross electricity consumption in Shan-dong would reach 260 TWh, increasing by 14.4% on ayear-on-year basis; the maximum load would reach 40.展开更多
Objective:To understand the research status of corona virus disease 2019(COVID-19),analyze research hotspots and dynamic frontiers,and provide ideas for the research of COVID-19.Methods:Bibliometrics method was used t...Objective:To understand the research status of corona virus disease 2019(COVID-19),analyze research hotspots and dynamic frontiers,and provide ideas for the research of COVID-19.Methods:Bibliometrics method was used to retrieve documents related to COVID-19 research through China National Knowledge Infrastructure,Web of Science,Pubmed databases,and the number of literature data,author,country,institution,source,keywords using CiteSpace,SPSS,Excel perform statistical analysis on other aspects,explain the current status and development trend of new coronavirus pneumonia research,and analyze and identify the research hotspots and dynamic frontiers of COVID-19 through the visual presentation of knowledge graph.Results:With the global spread of the new coronavirus pneumonia epidemic,a large number of studies on COVID-19 have been performed worldwide.In this paper,a total of 7,647 articles were retrieved through a database search,and 5,182 documents that met the criteria were selected for bibliographic analysis,including 2,388 Chinese documents.Articles,2,794 English literature,a total of 94 countries,3,985 institutions,10,339 authors participated in the relevant research of COVID-19,involving 999 kinds of journals,the Chinese scientific research team played a major role in the COVID-19 research,providing an important epidemic situation related research results.Conclusion:The current research focus is primarily on disease recognition,epidemic prevention and control,traditional Chinese medicine,clinical diagnosis and treatment,and epidemiology.展开更多
[Objective] The aim was to analyze one cold wave weather process in Chengdu in March in 2010.[Method] Based on the NCEP 1°×1° 6 h interval reanalysis data and daily observation data,using synoptic analy...[Objective] The aim was to analyze one cold wave weather process in Chengdu in March in 2010.[Method] Based on the NCEP 1°×1° 6 h interval reanalysis data and daily observation data,using synoptic analysis and diagnosis methods,and combining with the cold wave forecast index in spring of Sichuan,a cold wave event covering the whole region between March 21 and 24,2010 was analyzed from the aspects of circulation background,influencing weather systems and weather causation.[Result] Results showed that the 500 high-altitude cold vortex,700-850 hPa low layer shear,and ground cold front were the main systems that influenced this cold wave;there was a ridge from Lake Balkhash across Lake Baikal at 500 hPa.The early stage of the process was controlled by the high pressure ridge and the temperature was increasing obviously.The daily mean temperature was high.The range of cold high pressure was large and the central intensity was 1 043.0 hPa;the cold air was strong and deep which was in accordance with the strong surface temperature reduction center.The strong north airstream of Lake Balkhash to Lake Baikal,ground cold high pressure center intensity changes,north and south ocean pressure and temperature differences,850 hPa temperature changes,cold advection movement route and intensity were considered as reference factors for the forecast of cold wave intensity.[Conclusion] The study provided theoretical basis for improving the forecast ability of cold wave weather.展开更多
Network Security Situation Awareness System YHSAS acquires,understands and displays the security factors which cause changes of network situation,and predicts the future development trend of these security factors.YHS...Network Security Situation Awareness System YHSAS acquires,understands and displays the security factors which cause changes of network situation,and predicts the future development trend of these security factors.YHSAS is developed for national backbone network,large network operators,large enterprises and other large-scale network.This paper describes its architecture and key technologies:Network Security Oriented Total Factor Information Collection and High-Dimensional Vector Space Analysis,Knowledge Representation and Management of Super Large-Scale Network Security,Multi-Level,Multi-Granularity and Multi-Dimensional Network Security Index Construction Method,Multi-Mode and Multi-Granularity Network Security Situation Prediction Technology,and so on.The performance tests show that YHSAS has high real-time performance and accuracy in security situation analysis and trend prediction.The system meets the demands of analysis and prediction for large-scale network security situation.展开更多
基金Project of Xi’an Science and Technology Plan(23YXYJ0163)Education and Teaching Reform Research Project of Xi’an Medical University in 2023(S202311840061)+1 种基金First Affiliated Hospital of Xi’an Medical University of China(XYYFY-2023-01)2021 Xi’an Medical University University-Level Science and Technology Innovation Team(2021TD14)。
文摘To understand the current situation of institutional registration in Shaanxi Province after the implementation ofregistration system management in drug clinical trial institutions.Relevant information was collected on the“Announcement on the Accreditation of Drug Clinical Trial Institutions”issued by the National Medical Products Administration from 2005 to August 2022,the record management information system of drug and medical device clinical trial institutions,and the drug clinical trial registration and information publicity platform.A retrospective analysis was carried out in terms of institutional development,regional distribution,registered majors,principal investigators,and the number of drug clinical trials.After the implementation of institution registration,the number of drug clinical trial institutions in Shaanxi Province increased by 47.4%,884 principal investigators were registered,the number of registered majors expanded from 58 qualified to 117,and the professional scope increased by 50.4%.The policy of institution registration is conducive to promoting the rational use of medical resources and the development of drug clinical trial institutions and improving the healthy development of the pharmaceutical industry in Shaanxi Province.
基金On-Campus Practical Teaching Base of Guangdong Ocean University(On-Campus Practical Training Base of Food Major,Project number:310210062204)Teaching Quality and Teaching Reform Project Construction Project of 2021 Guangdong Undergraduate Universities(Green Processing Industry College for Lingnan Specialty Fruits and Vegetables,Project number:310121062201)Teaching Quality and Teaching Reform Project Construction Project of 2022 Guangdong Undergraduate Universities(Guangdong Ocean University-Xizhilang Science and Technology Integration Practice Teaching Base,Project number:310117062201)。
文摘With the development of society,the overall development of various industries in our country is unprecedentedly prosperous.However,various damaging industries with the sole goal of profit have emerged,significantly reducing people’s experience in basic needs such as food,clothing,housing,and transportation.Food analysis course is an essential primary subject established by colleges and universities to cultivate food quality and safety talents.In order to further ensure the food safety of society,this article mainly analyzes the teaching reform path of food analysis courses under the new situation.We hope the views in this article can provide guidelines for relevant workers.
文摘With the rapid development of modern science and technology,artificial intelligence(AI)technology is becoming more and more mature,which has brought a profound impact on every field of human society.The new era background provides a new teaching concept for ideological and political teaching in colleges and universities.Teachers in colleges and universities should adopt a positive attitude to face the teaching change brought by new technology,update the teaching ideas in time,and adjust the teaching strategy.This paper will analyze the current situation of the integrated development of AI and ideological and political teaching and put forward corresponding teaching strategies to help train well-developed socialist successors.
文摘Needs analysis is an essential step in planning an oral presentation course in an ESP context.This paper illustrates two important areas in the relevant needs analysis: target situation analysis and present situation analysis.
文摘Objective:To demonstrate malaria situation analysis,stratification and planning for an endemic area in southern Iran.Methods:Data on health system,population,meteorological parameters, malaria cases,anopheline vectors,and control activities during 2005-2007 was obtained from Minab Health Center,Minab Meteorological Station and published documents about malaria elements in the study area.A datasheet was created in excel 2003 for analysis.Results:There were 644 health staff working in Minab District including 99 health staff in malaria control program.The health facilities are distributed as follow:1 hospital with 96 beds,23 health centers including private centers(10 in Minab city and 13 in rural area of Minab District) and 119 health houses in rural areas of Minab District.Anopheles stephensi was the dominant species in Minab District,however,Anopheles dthali,Anopheles superpictus,Anopheles fluviatilis,Anopheles multicolor,Anopheles pulcherrimus and Anopheles turkhudi can also be found in the area. Anopheles stephensi was reported susceptible to malathion,propoxur,primphos-methyl,lambdacyhalothrin permethrin and deltamethrin,and resistant to DDT and dieldrin in the area.During the study period a total of 10 665 positive cases were reported,mainly due to local transmission (99.6%).Plasmodium vivax was the main causative agent followed by Plasmodium falciparum. There were reports about drug resistance of Plasmodium falciparum in the area.Conclusions: Using different parameters,Minab was classified into 3 strata.A plan was designed based on described goal,objectives and targets.The approaches of this plan were categorized into:health education,early detection and correct treatment,and vector control.Main constraints of these approaches are population movement between Iran,Pakistan and Afghanistan;vector control challenges at district,inadequate skilled medical staff in malaria case management and weak inter-sectorial coordination for malaria control,especially in urban areas.
文摘We carried out a general survey of current situations of P.intermedius S.Y.Chen.Results show that P.intermedius S.Y.Chen is distributed in Dongkeng Township,Jingnan Township and Yanxi Township.It covers an area of 262.51 hm2.The distribution areas are narrow and limited.What's worse,it suffers from serious destruction and has been withered in large areas.Besides,according to current introduction test,it is difficult to survive in other places.In accordance with Exploring the Criteria for Endangered Categories of Bamboo Species from China put forward by Ma Naixun et al from the Research Institute of Subtropical Forestry of Chinese Academy of Forestry(RISFCAF),we propose incorporating P.intermedius S.Y.Chen into vulnerable species for protection.
文摘The CDTF-Library is a library in Chinese-German Technical Faculty of Qingdao University of Science and Technology in Qingdao.It is very small in scale.It only occupies an area of 60 square meters with 3 reading seats and 5000 original German books.The resources of German in domestic are relatively few and German resources are too expensive to buy.During the past years,more and more readers made complaints,against the limited resource of audio and video materials,lack of new books,short open time and unsatisfied technical environments.
基金Tianjin University Students Innovation Training Program(202110061104)Education and Teaching Research and Reform Project of Tianjin Agricultural University(2021-B-04).
文摘This study takes the students who intend to study for graduate students as the research object,and makes a questionnaire survey on the mathematics learning situation and learning platform of the postgraduate candidates.Questionnaires were distributed online and offline,and a total of 326 valid questionnaires were collected.Based on 326 questionnaires,this paper analyzes the current learning situation of mathematics in the postgraduate entrance examination and studies the strategies based on the present situation,which points out the direction for the construction of mathematics learning and communication platform based on the needs of postgraduate entrance examination.
基金Key Education Research Project of Zhaoqing Education Development Research Institute(ZQJYY2019044).
文摘Experimental teaching is an important part of biology teaching in middle school.In the form of questionnaire,this paper conducts a survey on some leading teachers of biology in the middle schools in the Yangjiang area about the biological experiment teaching in the implementation of the new curriculum,and analyzes the results of the survey.The problems and deficiencies in the implementation of biological experiment teaching in some middle schools in this area are found,and the relevant reform measures and suggestions are put forward in order to promote the better development of biological experiment teaching in middle schools.
文摘Ⅰ. The present Situation of Transnational Corporations’ Investment in TEDA (1 ) General situation Since its founding ten years ago, especially since 1992. TEDA has achieved encouraging successesin undertaking major projects. drawing the attention of leading consortia, omnibearingly solicitingbusiness and drawing foreign capital. By September 30, 1994, TEDA had approved 2054 solely for-
文摘The university is to train socialist builders and successors important base, and actively carry out work of party building is the core of college students' college party building work. In this paper, it analyzes the importance of college students in the new era of party building work carried out elaborate, and the College Students' party building work and the reasons for the problems. It then proposes effective measures to further improve the Party building work of college students in order to better promote the new era of college students the healthy development of building work.
文摘To some extent, college English teaching management affects the success or failure of university education. This paper analyzes the current status of research and management, the use of management to clarify the meaning of the five elements of law, based on the induction of the one-sided understanding, setting single, formal training, and simplistic assessment of the four questions, and start from the two elements of teaching and learning around how to teach, how to learn, how assessment of the problem, explore the three management initiatives, with a view of college English teaching management plays a certain significance.
文摘In China, the country with a large population, the number of rural residents still occupies a considerable proportion. With the development of the country, reducing the living standards of the gap between urban and rural areas as soon as possible, to be able to realize urban and rural integration, a new rural community management is a very good choice. In this paper, the research aims to Tsingtao li stone community the brief analysis of the present situation of community management, research on the current situation of community management problems, and put forward the community management services to long-term healthy development of the constructive Suggestions and countermeasures.
文摘This paper adopts the research methods such as literature material method, questionnaire investigation method, expert interview method and mathematical statistics to investigate and study the conditions of fancy rope skipping curriculum in 22 universities in Sichuan. The research shows that the university teachers highly recognize the fancy rope skipping curriculum; construction of teaching resources should be strengthened; cultivation of the professional teaching staffs should be strengthened; in terms of teaching materials, more premium teaching materials with high pertinence and professionalism are needed; the promotion and implementation of the curriculum system of fancy rope skipping should be boosted in different steps and stages; cultivation of the professional teachers should be enlarged; related scientific research of the curriculum system of fancy rope skipping should be strengthened.
文摘In the first half of 2007, the power industry in Shandongprovince continued to maintain a rapid growth momentum.The gross electricity consumption amounted to 121.25 TWh,14.4% higher over that in the same period of last year. The totalinstalled capacity reached 53.29 GW. It was expected that bythe end of 2007, the gross electricity consumption in Shan-dong would reach 260 TWh, increasing by 14.4% on ayear-on-year basis; the maximum load would reach 40.
文摘Objective:To understand the research status of corona virus disease 2019(COVID-19),analyze research hotspots and dynamic frontiers,and provide ideas for the research of COVID-19.Methods:Bibliometrics method was used to retrieve documents related to COVID-19 research through China National Knowledge Infrastructure,Web of Science,Pubmed databases,and the number of literature data,author,country,institution,source,keywords using CiteSpace,SPSS,Excel perform statistical analysis on other aspects,explain the current status and development trend of new coronavirus pneumonia research,and analyze and identify the research hotspots and dynamic frontiers of COVID-19 through the visual presentation of knowledge graph.Results:With the global spread of the new coronavirus pneumonia epidemic,a large number of studies on COVID-19 have been performed worldwide.In this paper,a total of 7,647 articles were retrieved through a database search,and 5,182 documents that met the criteria were selected for bibliographic analysis,including 2,388 Chinese documents.Articles,2,794 English literature,a total of 94 countries,3,985 institutions,10,339 authors participated in the relevant research of COVID-19,involving 999 kinds of journals,the Chinese scientific research team played a major role in the COVID-19 research,providing an important epidemic situation related research results.Conclusion:The current research focus is primarily on disease recognition,epidemic prevention and control,traditional Chinese medicine,clinical diagnosis and treatment,and epidemiology.
文摘[Objective] The aim was to analyze one cold wave weather process in Chengdu in March in 2010.[Method] Based on the NCEP 1°×1° 6 h interval reanalysis data and daily observation data,using synoptic analysis and diagnosis methods,and combining with the cold wave forecast index in spring of Sichuan,a cold wave event covering the whole region between March 21 and 24,2010 was analyzed from the aspects of circulation background,influencing weather systems and weather causation.[Result] Results showed that the 500 high-altitude cold vortex,700-850 hPa low layer shear,and ground cold front were the main systems that influenced this cold wave;there was a ridge from Lake Balkhash across Lake Baikal at 500 hPa.The early stage of the process was controlled by the high pressure ridge and the temperature was increasing obviously.The daily mean temperature was high.The range of cold high pressure was large and the central intensity was 1 043.0 hPa;the cold air was strong and deep which was in accordance with the strong surface temperature reduction center.The strong north airstream of Lake Balkhash to Lake Baikal,ground cold high pressure center intensity changes,north and south ocean pressure and temperature differences,850 hPa temperature changes,cold advection movement route and intensity were considered as reference factors for the forecast of cold wave intensity.[Conclusion] The study provided theoretical basis for improving the forecast ability of cold wave weather.
基金This work is funded by the National Natural Science Foundation of China under Grant U1636215the National key research and development plan under Grant Nos.2018YFB0803504,2016YFB0800303.
文摘Network Security Situation Awareness System YHSAS acquires,understands and displays the security factors which cause changes of network situation,and predicts the future development trend of these security factors.YHSAS is developed for national backbone network,large network operators,large enterprises and other large-scale network.This paper describes its architecture and key technologies:Network Security Oriented Total Factor Information Collection and High-Dimensional Vector Space Analysis,Knowledge Representation and Management of Super Large-Scale Network Security,Multi-Level,Multi-Granularity and Multi-Dimensional Network Security Index Construction Method,Multi-Mode and Multi-Granularity Network Security Situation Prediction Technology,and so on.The performance tests show that YHSAS has high real-time performance and accuracy in security situation analysis and trend prediction.The system meets the demands of analysis and prediction for large-scale network security situation.