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On the uniqueness of participation factors in nonlinear dynamical systems
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作者 XIA Tian-wei SUN Kai 《控制理论与应用》 2025年第11期2147-2155,共9页
In the modal analysis and control of nonlinear dynamical systems,participation factors(PFs)of state variables with respect to a critical or selected mode serve as a pivotal tool for simplifying stability studies by fo... In the modal analysis and control of nonlinear dynamical systems,participation factors(PFs)of state variables with respect to a critical or selected mode serve as a pivotal tool for simplifying stability studies by focusing on a subset of highly influential state variables.For linear systems,PFs are uniquely determined by the mode’s composition and shape,which are defined by the system’s left and right eigenvectors,respectively.However,the uniqueness of other types of PFs has not been thoroughly addressed in literatures.This paper establishes sufficient conditions for the uniqueness of nonlinear PFs and five other PF variants,taking into account uncertain scaling factors in a mode’s shape and composition.These scaling factors arise from variations in the choice of physical units,which depend on the value ranges of real-world state variables.Understanding these sufficient conditions is essential for the correct application of PFs in practical stability analysis and control design. 展开更多
关键词 participation factor mode shape mode composition nonlinear system oscillations
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Social Forestry and Women in China
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作者 Xie Jingxiang Wen YaliCollege of Economics and Management, Beijing Forestry University 《北京林业大学学报》 CAS CSCD 北大核心 1992年第S2期142-147,共6页
Although there is no uniform concept about social forestry in the world,its aim of servicing mankind is commonly considered,and the importance ofwomen’s participation is recognized. Women in China,as an important par... Although there is no uniform concept about social forestry in the world,its aim of servicing mankind is commonly considered,and the importance ofwomen’s participation is recognized. Women in China,as an important part of the labor force involved in thedevelopment of social forestry,can be divided into three categories according tothe type of women’s participation. Firstly women(as well as men)have the obligation to participate in 展开更多
关键词 FORESTRY PARTICIPATION mankind OBLIGATION participate WOMEN themselves think ARRANGE DAUGHTER
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“Go Green”—The New Mantra
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作者 Sonali Punhani 《地学前缘》 EI CAS CSCD 北大核心 2009年第S1期100-100,共1页
Rising temperatures are causing melting of glaciers around the world.ShivaLingam,the most sacred pilgrimages of the Hindus,which formed naturally for thousands of years has melted due to unusual hot climatic condition... Rising temperatures are causing melting of glaciers around the world.ShivaLingam,the most sacred pilgrimages of the Hindus,which formed naturally for thousands of years has melted due to unusual hot climatic conditions.In Indian tradition,the Earth is worshipped as the compassionate Mother Goddess. We need to take urgent affirmative collective measures as we have only"One Earth to Live On". 展开更多
关键词 climate change Earth realizing the inner SELF through the universal SELF HINDU philosophy-school of THOUGHT global crisis youth participation in Green Endeavours Indian scenario green INITIATIVES a green HOPE
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WORLD NEWS IN BRIEF (July 16-31, 1991)
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《国际展望》 北大核心 1991年第15期32-32,共1页
The two-day working conference of the Cambodian Supreme National Council opened in Beijing on July 16 with the participation of allthe conflicting factions in Cambodia. On July 18, the five permanent members of the UN... The two-day working conference of the Cambodian Supreme National Council opened in Beijing on July 16 with the participation of allthe conflicting factions in Cambodia. On July 18, the five permanent members of the UN Security Council and the cochairmen of the Paris conference ended their meeting on the Cambodia issue in Beijing with a communique. 展开更多
关键词 PARTICIPATION opened PERMANENT PARIS NEWS attended BASES nations sought worst
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电视综艺节目语境变量对语篇生成的影响
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作者 薛亚青 《现代传播(中国传媒大学学报)》 CSSCI 北大核心 2015年第3期165-167,共3页
语境是产生语篇的环境和依据,没有任何一个语篇的产生与理解能够脱离语境。语篇是靠语境变量的合力生成的(Halliday,Hasan)。在电视综艺节目中,语境同样制约语篇的生成。Hymes把语境变量归纳为SPEAKING,即场景(setting)、参与者(pa... 语境是产生语篇的环境和依据,没有任何一个语篇的产生与理解能够脱离语境。语篇是靠语境变量的合力生成的(Halliday,Hasan)。在电视综艺节目中,语境同样制约语篇的生成。Hymes把语境变量归纳为SPEAKING,即场景(setting)、参与者(participant)、目的 (ends)、行为序列(act sequence)、基调(key)、工具(instrumentalities)、规范(norms)、语类(genre)。 展开更多
关键词 电视综艺节目 语篇生成 行为序列 PARTICIPANT 语用原则 语篇结构 《快乐大本营》 会话含义 何炅 话语行为
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How Improve Your Teaching
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作者 Charlatte.R.Petres 《教学与管理(中学版)》 1991年第6期24-24,共1页
The avenue by which we Learn are differentSome people Learn throngh, hearing others throughseeing, antd Some use a combination of the two.However for many that isn’t enough. They mustuse these ways plus speaking and ... The avenue by which we Learn are differentSome people Learn throngh, hearing others throughseeing, antd Some use a combination of the two.However for many that isn’t enough. They mustuse these ways plus speaking and writing. studiesShow that the stmost effective method of learning isto practice what has bbeenaquired. An ameia the trend. has moved from lecture toclass participation. Stu -- dents earn letter gradeswhen they have the opportunity to ask questions, toform Small discussion groups, to role play, to ex-press ideas in writing and in Song, and even to en-gage in games that are related to the lesson. 展开更多
关键词 SPEAKING LESSON writing discussion questions OPPORTUNITY HEARING PARTICIPATION LECTURE letter
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记录正在消失的文化(上)──人类学纪录片在中国 被引量:9
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作者 张明 《现代传播(中国传媒大学学报)》 CSSCI 北大核心 2000年第5期73-80,共8页
19世纪末电影的发明凝结了很多人的智慧,爱迪生、卢米埃尔兄弟等诸多前人发明电影是为了记录人类创造的历史和文化,抑或是为了给单调乏味的人类生活增添一些乐趣,我们无从了解。而敏锐的人类学家几乎在电影诞生的同时也意识到了这... 19世纪末电影的发明凝结了很多人的智慧,爱迪生、卢米埃尔兄弟等诸多前人发明电影是为了记录人类创造的历史和文化,抑或是为了给单调乏味的人类生活增添一些乐趣,我们无从了解。而敏锐的人类学家几乎在电影诞生的同时也意识到了这种光与影结合的技术在田野调查、教学研究以及保存异文化模式方面具有文字所无法比拟的表现空间。 本文主要结合西方影视人类学的发展脉络,概略回顾了人类学纪录片在中国近一个世纪的发展史,并对一些重点作品进行了分析。对人类学和纪录片这两个源自西方的概念在中国语境的不同解释也作了一番探究。此外还从人类学田野研究的角度阐述了“参与观察”对纪录片创作的意义以及未来人类学纪录片在中国的走向。 展开更多
关键词 人类学纪录片(anthropology documentary) 文化(culture) 文化变迁(culture change) 参与观察(Participant Observation)
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Group Discussion to be Introduced to the EFL Classroom
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作者 罗雅晖 《陕西师范大学学报(哲学社会科学版)》 CSSCI 北大核心 2002年第S3期117-123,共7页
Teacher_centered classroom teaching makes students to be passivereceiversandunabletouseEnglishasaneffectivetool.ThispaperfocusesonusingdiscussioninEFLclassroomandintroducesthepractisingmethodsofeachstepindetail.Thepap... Teacher_centered classroom teaching makes students to be passivereceiversandunabletouseEnglishasaneffectivetool.ThispaperfocusesonusingdiscussioninEFLclassroomandintroducesthepractisingmethodsofeachstepindetail.ThepaperexpectstofindanewandmoreeffectivepatternthroughanalysisandargumentationtomakestudentsmoreskillfulinusingEnglishanddevelopabetterhabitinclassroomteachingactivities. 展开更多
关键词 GROUP DISCUSSION Englis hteaching PARTICIPANT
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MicroRNA regulation of endothelial progenitor cell angiogenesis in diabetes 被引量:1
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作者 Alex F.Chen 《中国病理生理杂志》 CAS CSCD 北大核心 2010年第A10期1946-1946,共1页
Endothelial progenitor cells(EPCs)are a circulating,bone marrow-derived cell population that participate in both vasculogenesis and vascular homeostasis.Recent studies have shown that EPCs are reduced by^50% in diabet... Endothelial progenitor cells(EPCs)are a circulating,bone marrow-derived cell population that participate in both vasculogenesis and vascular homeostasis.Recent studies have shown that EPCs are reduced by^50% in diabetes that correlates inversely with its mortality rate.In addition,EPC angiogenic functions are severely impaired in diabetes.However,the molecular and cellular mechanisms underlying EPC dysfunction are poorly understood.Our current studies have focused on in vitro and in 展开更多
关键词 PROGENITOR IMPAIRED HOMEOSTASIS EPCS understood ANGIOGENESIS poorly CIRCULATING underlying participate
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Factors Hindering Pakistani Farmers' Choices Towards Adoption of Crop Insurance 被引量:1
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作者 Sidra Ghazanfar Zhang Qi-wen +3 位作者 Muhammad Abdullah Jaleel Ahmed Imran Khan Zeeshan Ahmad 《Journal of Northeast Agricultural University(English Edition)》 CAS 2015年第2期92-96,共5页
This study was conducted to analyze the factors that negatively influence Pakistani farmers' willingness to participate in crop insurance. Probit model was applied to identify the significant factors which influenced... This study was conducted to analyze the factors that negatively influence Pakistani farmers' willingness to participate in crop insurance. Probit model was applied to identify the significant factors which influenced our dependent variable "not willing to participate". The results of the analyses showed that crop insurance premium was the most influencing factor which had positive and significant impact on dependent variable. Similarly dissatisfaction with crop loan insurance scheme, lacking of knowledge about crop insurance, believing of being against Islamic rules and time taking process was also found to be positive and significantly influenced the dependent variable. While limited decision power and limited perils were not found to be significant in the results. 展开更多
关键词 crop insurance willingness to participate Probit model PREMIUM
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中国临床试验注册中心关于推进临床试验数据共享的公告 被引量:1
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《中国全科医学》 CAS CSCD 北大核心 2016年第10期1203-1203,共1页
WHO临床试验注册平台于2015年8月发布了关于支持临床试验数据共享的声明,国际医学期刊编辑委员会于2016年1月20日发布了关于临床试验数据共享的建议。中国临床试验注册中心对此完全赞同,这与我们长期以来所主张和推动的临床试验透明化... WHO临床试验注册平台于2015年8月发布了关于支持临床试验数据共享的声明,国际医学期刊编辑委员会于2016年1月20日发布了关于临床试验数据共享的建议。中国临床试验注册中心对此完全赞同,这与我们长期以来所主张和推动的临床试验透明化完全一致,体现了全社会对承担安全风险、为全人类健康事业做出卓越奉献的参试者的尊重,也体现了医学研究者的社会责任感。为了响应和配合国际医学期刊编辑委员会的建议和WHO临床试验注册平台的声明, 展开更多
关键词 临床试验注册 临床试验数据 医学研究者 计划书 必填项 医学研究伦理 PARTICIPANT http 知情同意书 病例记录
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Probing membrane dynamics in living cells with spot-variation fluorescence correlation spectroscopy
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作者 Haitao He 《医用生物力学》 EI CAS CSCD 北大核心 2013年第S1期29-29,共1页
Cell membranes actively participate in numerous cellular functions.Inasmuch as bioactivities of cell membranes are known to depend crucially on their lateral organization,much effort has been focused on deciphering th... Cell membranes actively participate in numerous cellular functions.Inasmuch as bioactivities of cell membranes are known to depend crucially on their lateral organization,much effort has been focused on deciphering this organization on different length scales.Within this context,the concept of lipid-dependent membrane domains,the so-called lipid rafts,has been intensively scrutinized over recent years~[1].Using fluorescent correlation spectroscopy(FCS)that has the ability to measure diffusion parameters with great precision,in association with original experimental strategies,we have probed modes of protein and lipid lateral dynamics within the plasma membrane of living cells.These investigations have allowed significant progress 展开更多
关键词 NUMEROUS participate LIPID scales length allowed REGULATING TRANSDUCTION
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国际药理学联合会(IUPHAR)贺信(英文)
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作者 S.J.Enna Michaell Spedding Petra Thürmann 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2015年第5期657-657,共1页
Better Medicines through Global Education and Research October 12,2015Dear Professor Du:On behalf of the International Union of Basic and Clinical Pharmacology(IUPHAR)we wish to extend our best wishes and congratul... Better Medicines through Global Education and Research October 12,2015Dear Professor Du:On behalf of the International Union of Basic and Clinical Pharmacology(IUPHAR)we wish to extend our best wishes and congratulations to you and your colleagues as you celebrate the 30th anni-versary of the founding of the Chinese Pharmacological Society(CNPHARS). 展开更多
关键词 behalf IUPHAR FOUNDING celebrate mankind PHARMACOLOGY participate CONTINUING impressive DISCIPLINE
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12th International Congress of Neuroimmunology(ISNI 2014)
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《中国现代神经疾病杂志》 CAS 2014年第9期837-837,共1页
Time: November 9-13, 2014 Venue: Mainz, Germany Email: program@sfn.org Website: http://www.isniweb.org/congresses Organizer: International Society of Neuroimmunology (ISNI)
关键词 Rheingoldhalle PARTICIPANTS contributed workshops
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Analyzing Factors Contributing to Farmers' Willingness to Participate in Rural Cooperative Finance Organizations
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作者 Yu Yang Zhang Li 《Journal of Northeast Agricultural University(English Edition)》 CAS 2019年第1期86-96,共11页
It has been commonly recognized that the cooperative finance organizations in China's rural areas have been playing an important role in spreading farm production risks, increasing farmers' income, as well as ... It has been commonly recognized that the cooperative finance organizations in China's rural areas have been playing an important role in spreading farm production risks, increasing farmers' income, as well as stimulating the overall rural economic growth. This paper attempted to identify the key factors which potentially contributed to the farmers' willingness to participate in the new-form of the rural cooperative finance organizations sponsored by the Chinese governments. In the process, a total of 442 farmer households as well as small-micro farming enterprises were sampled from the villages in Panjin municipality of Liaoning Province in China, where the new form of the rural cooperative finance organization(NFRCFO) experiment was under way. Those potential factors were classified into the four categories, including the characteristics of the famer households, the reputation of the rural finance cooperatives, transaction costs paid, as well as service quality. A discrete Logit model was used for parameter estimations. The results showed that most of the factors being considered exhibited statistically significant effects on the farmers' willingness to take part in NFRCFO, but with each presenting different levels of impacts. The causes and effects for those uncovered empirical results were fully discussed following by policy implication discussion. 展开更多
关键词 factor analysis RURAL cooperative FINANCE WILLINGNESS to participate LOGIT model
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英语的话语接续与语言习得
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作者 张传真 张法科 《山东外语教学》 北大核心 1989年第1期78-81,共4页
近二十年来,不少语言学家致力于交际中话语接续(turn—taking)问题的研究,试图找到一种恰当的方法来描述和解释正常交谈中话语接续的程序以及与之有关的因素。一著名语言学家Levinson在其1983年出版的“Pragmatics”一书中曾指出:“Conv... 近二十年来,不少语言学家致力于交际中话语接续(turn—taking)问题的研究,试图找到一种恰当的方法来描述和解释正常交谈中话语接续的程序以及与之有关的因素。一著名语言学家Levinson在其1983年出版的“Pragmatics”一书中曾指出:“Conversation is characterized by turn-taking:one participant,A,talks,stops;another,B,starts,talks;stops;and so we obtain an A—B—A—B—A—B distribution of talk across two participants.”更有趣的是,有时交谈的一方使用美国英语而另一方使用英国英语。 展开更多
关键词 语言习得 PARTICIPANT 交际语言教学 语音教学 SPEAKER 口语教材 交谈双方 中国英语教学 课堂教学 starts
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如何使学生掌握好短语动词的词义
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作者 徐振忠 《山东外语教学》 1982年第2期69-71,共3页
在现代英语中,短语动词的数量和实际应用率正在不断增加和发展。原来许多仅在口语中应用的短语动词,如go on,put off,look into,call on,pick out,leave out,toke part in等,逐渐代替了与它们同义的单字动词 continue,postpone,investig... 在现代英语中,短语动词的数量和实际应用率正在不断增加和发展。原来许多仅在口语中应用的短语动词,如go on,put off,look into,call on,pick out,leave out,toke part in等,逐渐代替了与它们同义的单字动词 continue,postpone,investigate,visit,choose,omit,participate,而在书面上广泛地应用。在部编的中学课本中,出现了相当数量的短语动词。初中一至六册共143个,高中第一册35个,高中一、二两本代用课本共95个。短语动词一般是由一些常用的动词(如go,look,pick,put,come,turn,take, 展开更多
关键词 现代英语 中学课本 LEAVE CHOOSE participate insist 一词多义 应用率 GRASP 特殊疑问句
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