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Promotion of structural plasticity in area V2 of visual cortex prevents against object recognition memory deficits in aging and Alzheimer's disease rodents
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作者 Irene Navarro-Lobato Mariam Masmudi-Martín +8 位作者 Manuel F.López-Aranda Juan F.López-Téllez Gloria Delgado Pablo Granados-Durán Celia Gaona-Romero Marta Carretero-Rey Sinforiano Posadas María E.Quiros-Ortega Zafar U.Khan 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第8期1835-1841,共7页
Memory deficit,which is often associated with aging and many psychiatric,neurological,and neurodegenerative diseases,has been a challenging issue for treatment.Up till now,all potential drug candidates have failed to ... Memory deficit,which is often associated with aging and many psychiatric,neurological,and neurodegenerative diseases,has been a challenging issue for treatment.Up till now,all potential drug candidates have failed to produce satisfa ctory effects.Therefore,in the search for a solution,we found that a treatment with the gene corresponding to the RGS14414protein in visual area V2,a brain area connected with brain circuits of the ventral stream and the medial temporal lobe,which is crucial for object recognition memory(ORM),can induce enhancement of ORM.In this study,we demonstrated that the same treatment with RGS14414in visual area V2,which is relatively unaffected in neurodegenerative diseases such as Alzheimer s disease,produced longlasting enhancement of ORM in young animals and prevent ORM deficits in rodent models of aging and Alzheimer’s disease.Furthermore,we found that the prevention of memory deficits was mediated through the upregulation of neuronal arbo rization and spine density,as well as an increase in brain-derived neurotrophic factor(BDNF).A knockdown of BDNF gene in RGS14414-treated aging rats and Alzheimer s disease model mice caused complete loss in the upregulation of neuronal structural plasticity and in the prevention of ORM deficits.These findings suggest that BDNF-mediated neuronal structural plasticity in area V2 is crucial in the prevention of memory deficits in RGS14414-treated rodent models of aging and Alzheimer’s disease.Therefore,our findings of RGS14414gene-mediated activation of neuronal circuits in visual area V2 have therapeutic relevance in the treatment of memory deficits. 展开更多
关键词 behavioral performance brain-derived neurotrophic factor cognitive dysfunction episodic memory memory circuit activation memory deficits memory enhancement object recognition memory prevention of memory loss regulator of G protein signaling
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Research on Demand Response Potential of Adjustable Loads in Demand Response Scenarios
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作者 Zhishuo Zhang Xinhui Du +3 位作者 Yaoke Shang Jingshu Zhang Wei Zhao Jia Su 《Energy Engineering》 EI 2024年第6期1577-1605,共29页
To address the issues of limited demand response data,low generalization of demand response potential evaluation,and poor demand response effect,the article proposes a demand response potential feature extraction and ... To address the issues of limited demand response data,low generalization of demand response potential evaluation,and poor demand response effect,the article proposes a demand response potential feature extraction and prediction model based on data mining and a demand response potential assessment model for adjustable loads in demand response scenarios based on subjective and objective weight analysis.Firstly,based on the demand response process and demand response behavior,obtain demand response characteristics that characterize the process and behavior.Secondly,establish a feature extraction and prediction model based on data mining,including similar day clustering,time series decomposition,redundancy processing,and data prediction.The predicted values of each demand response feature on the response day are obtained.Thirdly,the predicted data of various characteristics on the response day are used as demand response potential evaluation indicators to represent different demand response scenarios and adjustable loads,and a demand response potential evaluation model based on subjective and objective weight allocation is established to calculate the demand response potential of different adjustable loads in different demand response scenarios.Finally,the effectiveness of the method proposed in the article is verified through examples,providing a reference for load aggregators to formulate demand response schemes. 展开更多
关键词 Demand response potential demand response scenarios data mining adjustable load evaluation system subjective and objective weight allocation
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Comprehensive Evaluation of Distributed PV Grid-Connected Based on Combined Weighting Weights and TOPSIS-RSR Method
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作者 Yue Yang Jiarui Zheng +2 位作者 Long Cheng Yongnan Zhu Hao Wu 《Energy Engineering》 EI 2024年第3期703-728,共26页
To effectively quantify the impact of distributed photovoltaic(PV)access on the distribution network,this paper proposes a comprehensive evaluation method of distributed PV grid connection combining subjective and obj... To effectively quantify the impact of distributed photovoltaic(PV)access on the distribution network,this paper proposes a comprehensive evaluation method of distributed PV grid connection combining subjective and objective combination of assignment and technique for order preference by similarity to an ideal solution(TOPSIS)—rank sum ratio(RSR)(TOPSIS-RSR)method.Based on the traditional distribution network evaluation system,a comprehensive evaluation system has been constructed.It fully considers the new development requirements of distributed PV access on the environmental friendliness and absorptive capacity of the distribution grid and comprehensively reflects the impact of distributed PV grid connection.The analytic hierarchy process(AHP)was used to determine the subjective weights of the primary indicators,and the Spearman consistency test was combined to determine the weights of the secondary indicators based on three objective assignment methods.The subjective and objective combination weights of each assessment indicator were calculated through the principle of minimum entropy.Calculate the distance between the indicators to be evaluated and the positive and negative ideal solutions,the relative closeness ranking,and qualitative binning by TOPSIS-RSR method to obtain the comprehensive evaluation results of different scenarios.By setting up different PV grid-connected scenarios and utilizing the IEEE33 node simulation algorithm,the correctness and effectiveness of the proposed subject-object combination assignment and integrated assessment method are verified. 展开更多
关键词 Distributed PV grid-connected comprehensive evaluation evaluation indicator system combined subjective and objective empowerment TOPSIS-RSR method
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Impacts of Social and Demographic Factors on Residents' Subjective Well-being in Rural China 被引量:3
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作者 Wang Jian Meng Qingyue +3 位作者 Winnie Yip Sun Qiang Qu Jiangbin Jia Liying 《Chinese Journal of Population,Resources and Environment》 2010年第1期81-87,共7页
The objective of social development is to construct a harmonious society.In China,the key to a harmonious society is the happiness of more than 900 million farmers living in the rural areas.This study aimed to measure... The objective of social development is to construct a harmonious society.In China,the key to a harmonious society is the happiness of more than 900 million farmers living in the rural areas.This study aimed to measure rural residents' subjective well-being(SWB) through the day reconstruction method,as well as to analyze SWB's influencing factors through a variety of statistical methods.The results showed that the average U index was 12.79%,indicating that respondents were unhappy 12.79% of the time.Twenty-seven percent of the population had a U index greater than 0,with the average value being 47%,indicating that these people were unhappy 47% of the time.The study also found that SWB varied according to the characteristics of the respondents.Logistic regression analysis showed that social and demographic factors,including age,education,county,household size,generation number,per capita income,migration status and social networking,which significantly affected rural residents' SWB.The size of the impact varied with the different factors. 展开更多
关键词 rural residents subjective well-being day reconstruc-tion method social and demographic factors
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Perceptual Quality Assessment of Omnidirectional Images:Subjective Experiment and Objective Model Evaluation
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作者 DUAN Huiyu ZHAI Guangtao +3 位作者 MIN Xiongkuo ZHU Yucheng FANG Yi YANG Xiaokang 《ZTE Communications》 2019年第1期38-47,共10页
Virtual reality(VR) environment can provide immersive experience to viewers.Under the VR environment, providing a good quality of experience is extremely important.Therefore, in this paper, we present an image quality... Virtual reality(VR) environment can provide immersive experience to viewers.Under the VR environment, providing a good quality of experience is extremely important.Therefore, in this paper, we present an image quality assessment(IQA) study on omnidirectional images. We first build an omnidirectional IQA(OIQA) database, including 16 source images with their corresponding 320 distorted images. We add four commonly encountered distortions. These distortions are JPEG compression, JPEG2000 compression, Gaussian blur, and Gaussian noise. Then we conduct a subjective quality evaluation study in the VR environment based on the OIQA database. Considering that visual attention is more important in VR environment, head and eye movement data are also tracked and collected during the quality rating experiments. The 16 raw and their corresponding distorted images,subjective quality assessment scores, and the head-orientation data and eye-gaze data together constitute the OIQA database. Based on the OIQA database, we test some state-of-the-art full-reference IQA(FR-IQA) measures on equirectangular format or cubic formatomnidirectional images. The results show that applying FR-IQA metrics on cubic format omnidirectional images could improve their performance. The performance of some FR-IQA metrics combining the saliency weight of three different types are also tested based on our database. Some new phenomena different from traditional IQA are observed. 展开更多
关键词 perceptual quality assessment OMNIDIRECTIONAL IMAGES subjectIVE EXPERIMENT objective model evaluation VISUAL SALIENCY
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Influence of Subjective Knowledge, Objective Knowledge and Health Consciousness on Olive Oil Consumption—A Case Study
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作者 Adriana Gámbaro Ana C. Ellis Víctor Prieto 《Food and Nutrition Sciences》 2013年第4期445-453,共9页
Unlike the case in Mediterranean countries, where olive oil consumption is driven by habit or tradition, in a population where olive oil consumption rates are considerably low, it appears reasonable to suppose that th... Unlike the case in Mediterranean countries, where olive oil consumption is driven by habit or tradition, in a population where olive oil consumption rates are considerably low, it appears reasonable to suppose that the initial decision to buy a fairly expensive product—as is the case with olive oil in the Uruguayan market—may result from an individual’s overall interest in health-related issues and/or their acquaintance with relevant nutritional properties of the particular product—in this case, olive oil. Consumer subjective and objective knowledge, interest in health-related issues, and demographic variables were studied for their potential relationship (explanatory capacity) with olive oil consumption frequency, using a sample of 256 inhabitants of Montevideo (Uruguay). Several of the studied variables were found to relate to olive oil consumption, such as subjective and objective knowledge, age, education level, marital status, and interest in health-related issues. Subjective knowledge was found to have the highest explanatory capacity. An increase in subjective knowledge is therefore expected to lead to an increase in consumption frequency among regular olive oil consumers, while it may also encourage less frequent or non-consumers to purchase olive oil and become acquainted with the product. 展开更多
关键词 OLIVE Oil subjectIVE KNOWLEDGE objective KNOWLEDGE HEALTH CONSCIOUSNESS Decision Trees
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A Contrastive Study on the C-E Translation of the Verb of Perception zhijian from the Perspective of Subjective Consciousness and Objective Consciousness
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作者 Huidan Lu 《Review of Educational Theory》 2020年第4期19-24,共6页
Verbs of perception include sight,hearing,smell,taste and touch,of which zhijian belongs to sight is very common in literary works,and its semantic meaning also begins to change with the development of time.Based on t... Verbs of perception include sight,hearing,smell,taste and touch,of which zhijian belongs to sight is very common in literary works,and its semantic meaning also begins to change with the development of time.Based on the original text and two translated versions of the Water Margin,this paper makes a comparative analysis of the translation strategies of zhijian on the basis that Chinese emphasizes subjective consciousness and the mixed consciousness of subjectivity and objectivity,while English stresses objective consciousness with a clear boundary between subjectivity and objectivity.According to previous studies,this paper regroups the appearance of zhijian and divides it into two categories,namely zhijian at the beginning of a sentence and at the beginning of a minor sentence.On the basis of the context and the changing function of zhijian,that is,the function of being a verb and being a discourse marker,it can be concluded that as the meaning of a verb,the real action,the meaning of zhijian is expressed by“seeing”,so translators usually adopt literal translation;while as a discourse marker,it is no longer the main component of sentence structure,but to highlight the following information,translators will adopt deletion,conversion and retaining.It can be seen that translators often need to convert Chinese characterized by subjective consciousness into English dominated by objective consciousness,thus conforming to various meaning of zhijian. 展开更多
关键词 subjective consciousness and objective consciousness Verbs of perception zhijian A contrastive study on the C-E translation
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What is the subject and object of social security?
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作者 WANG Shuo 《International English Education Research》 2018年第3期47-48,共2页
The subject and the object are a pair of concepts within the philosophical category. Dialectical materialism takes practice as the medium, and holds that subject is the existence of an active objective world, and that... The subject and the object are a pair of concepts within the philosophical category. Dialectical materialism takes practice as the medium, and holds that subject is the existence of an active objective world, and that the object is the object of practical activity. Under certain conditions, the subject and object can In terms of social security, the main body of responsibility is the government that allows the transfer of citizens' rights. Thereforethe government is the main body of production and providers of public goods, and the object is the main body's guaranteed rights and obligations. Commonly pointed objects or things generally refer to specific material information in practical operations, abstract information economy, legal norms, and the entire practice process. 展开更多
关键词 social security subject object
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Subject,Object and Target Systems of Rural Human Resource Development
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作者 SHEN Hong1,2,ZHAO Yong-le2,HUANG De-bing1 1.School of Management,Guilin University of Technology,Guilin 541004,China 2.Business School of Hehai University,Nanjing 210098,China 《Asian Agricultural Research》 2012年第3期33-36,共4页
From subject,object and target subsystems,we analyze the rural human resource development system.The subject system includes government,education and training organizations,society,and rural human resource itself.Diff... From subject,object and target subsystems,we analyze the rural human resource development system.The subject system includes government,education and training organizations,society,and rural human resource itself.Different development subject bears different responsibility.Object system includes farmers engaged in farming,farmer workers,rural unemployed people,rural students,rural left-behind people,and other people in rural areas.Different development object has different features.Development target system includes raising quality of rural human resource,keeping reasonable population size,optimizing structure of rural human resource,and improving vitality of rural human resource,etc. 展开更多
关键词 RURAL areas HUMAN RESOURCE development subject OBJ
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Subjectivities of the Scientific Endeavor:Noting the Illusion of Objectivity in the History of Science and Medicine
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作者 Imanni K.Sheppard 《History & Philosophy of Medicine》 2022年第1期4-8,共5页
The history of science and medicine has long been steeped in the notion that they are objective(untainted by the philosophical and ideological ebbs and flows of society)and utilitarian(doing what is best for the great... The history of science and medicine has long been steeped in the notion that they are objective(untainted by the philosophical and ideological ebbs and flows of society)and utilitarian(doing what is best for the greater good).Because of this,scientific and medical epistemologies and praxis are often held to an esteem that is unquestioned,celebrated,and occasionally unchecked.A closer look at the history of science and medicine,however,readily reveal the extent to which the milieu of society has informed scientific and medical endeavors.As such,an understanding of how the subjectivities of scientific and medical endeavors situate within our contemporary disciplines and practices is significant to one’s ability to truly understand said disciplines.Likewise,such an evaluation will provide insight into our role in perpetuating the illusion of objectivity in these fields.With this in mind,this paper provides a philosophical and historical examination of the concept of objectivity(in contrast to subjectivity)in science and medicine. 展开更多
关键词 objectIVITY subjectIVITY history of science history of medicine natural law
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Objective and subjective measures for sleep disorders 被引量:2
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作者 张琳 赵忠新 《Neuroscience Bulletin》 SCIE CAS CSCD 2007年第4期236-240,共5页
Subjective and objective measures of sleep structure or quality could help to characterize the chronic sleep disturbances, with relation to patients' risk factor profiles and co-morbidities. Studies have shown that d... Subjective and objective measures of sleep structure or quality could help to characterize the chronic sleep disturbances, with relation to patients' risk factor profiles and co-morbidities. Studies have shown that discrepancies can occur between subjective data regarding sleep disturbances and the impact of insomnia and objective assays, and surrogate markers of sleep and sleep disturbances. Both objective and subjective measures should be incorporated into clinic studies. It seems likely that sleep quality is represented by a combination of more than one subjective sleep parameter. Objective and subjective assessments of sleep quality may relate to different parameters. Future studies incorporated both subjective and objective measures could help to address the sleep disorders. 展开更多
关键词 objective measures subjective measures sleep disorders
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Retrieval Single-Doppler Radar Wind with Variational Assimilation Method-Part I: Objective Selection of Functional Weighting Factors 被引量:5
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作者 魏鸣 党人庆 葛文忠 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 1998年第4期123-138,共16页
In variational problem, the selection of functional weighting factors (FWF) is one of the key points for discussing many relevant studies. To overcome arbitrariness and subjectivity of the empirical selecting methods ... In variational problem, the selection of functional weighting factors (FWF) is one of the key points for discussing many relevant studies. To overcome arbitrariness and subjectivity of the empirical selecting methods used widely at present, this paper tries to put forward an optimal objective selecting method of FWF. The focus of the study is on the weighting factors optimal selection in the variation retrieval single-Doppler radar wind field with the simple adjoint models. Weighting factors in the meaning of minimal variance are calculated out with the matrix theory and the finite difference method of partial differential equation. Experiments show that the result is more objective comparing with the factors obtained with the empirical method. 展开更多
关键词 Variation Weighting factor Minimum variance objective selection
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Efficient Spam Filtering System Based on Smart Cooperative Subjective and Objective Methods
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作者 Samir A. Elsagheer Mohamed 《International Journal of Communications, Network and System Sciences》 2013年第2期88-99,共12页
Most of the spam filtering techniques are based on objective methods such as the content filtering and DNS/reverse DNS checks. Recently, some cooperative subjective spam filtering techniques are proposed. Objective me... Most of the spam filtering techniques are based on objective methods such as the content filtering and DNS/reverse DNS checks. Recently, some cooperative subjective spam filtering techniques are proposed. Objective methods suffer from the false positive and false negative classification. Objective methods based on the content filtering are time consuming and resource demanding. They are inaccurate and require continuous update to cope with newly invented spammer’s tricks. On the other side, the existing subjective proposals have some drawbacks like the attacks from malicious users that make them unreliable and the privacy. In this paper, we propose an efficient spam filtering system that is based on a smart cooperative subjective technique for content filtering in addition to the fastest and the most reliable non-content-based objective methods. The system combines several applications. The first is a web-based system that we have developed based on the proposed technique. A server application having extra features suitable for the enterprises and closed work groups is a second part of the system. Another part is a set of standard web services that allow any existing email server or email client to interact with the system. It allows the email servers to query the system for email filtering. They can also allow the users via the mail user agents to participate in the subjective spam filtering problem. 展开更多
关键词 ANTI-SPAM SYSTEM objective SPAM FILTERING Cooperative subjectIVE SPAM FILTERING WEB Application WEB Services
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Argument Ambiguities Make Subject Relative Clause More Difficult to Process than Object Relative Clause in Mandarin
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作者 YANG Xie-lan HE Wen-guang 《Journal of Literature and Art Studies》 2020年第2期102-113,共12页
Relative clauses(RCs)processing has been a hot issue in decades.Studies from head-initial languages have found that SRCs were easier to comprehend than ORCs,and many different models were constructed to account for SR... Relative clauses(RCs)processing has been a hot issue in decades.Studies from head-initial languages have found that SRCs were easier to comprehend than ORCs,and many different models were constructed to account for SRCs preference.Chinese are head-final languages and the head noun phrases are behind the internal-clause.Such a great difference in syntactic structure made Chinese to be the optimum material to test the models mentioned above.In the paper,two experiments were carried out using eye-movement tracking methods to explore the difficulty with RCs processing in mandarin,and results showed that:when the two noun phrases were both from animate category,SRCs were more difficult than ORCs,but when the noun phrases in the internal-relative-clause were inanimate and the noun phrases in the matrix were animate,the difficulties with SRCs were greatly reduced.Based on these findings,we hold that the linear syntactic distance between the gap and the filler was not the key reason to the difficulty with SRCs.On the contrary,the ambiguity in argument construction may be the most important. 展开更多
关键词 subjective RELATIVE CLAUSE object RELATIVE CLAUSE ARGUMENT ambiguity MandARIN
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Study on Influencing Factors of Subjective Well-being of Workers in Manufacturing Industry
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作者 Ke Dong 《Journal of Finance Research》 2021年第1期29-32,共4页
Strengthening the research on the influencing factors of subjective well-being of workers in manufacturing industry is helpful to adopt comprehensive measures to improve the well-being of industrial workers,enhance th... Strengthening the research on the influencing factors of subjective well-being of workers in manufacturing industry is helpful to adopt comprehensive measures to improve the well-being of industrial workers,enhance the competitiveness of enterprises and promote their better development.This paper attempts to analyze the factors that affect workers’subjective well-being from the aspects of employees themselves,economic income,and enterprise organization. 展开更多
关键词 Workers subjective well-being Influencing factors
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Selection Factors for Market Subjects of Agricultural Industrial Development
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作者 DAI Xiao-ti School of Economics and Management, Nanjing Xiaozhuang University, Nanjing 211171, China 《Asian Agricultural Research》 2012年第1期1-4,8,共5页
The paper firstly analyzes selection factors for market subjects of agricultural industrial development in China. From the political aspect, it is required to take account of features of subjects of agricultural indus... The paper firstly analyzes selection factors for market subjects of agricultural industrial development in China. From the political aspect, it is required to take account of features of subjects of agricultural industrial development at current stage. From economic aspects, we should adheres to the two-tier management system that integrates unified with separate management on the basis of household contract management in the countryside, and cultivate and foster subject enterprises according to features of most important market subjects in market economy. From natural aspects, it is proposed to consider features of agricultural industry and inherent advantages of agricultural resources in China. From social aspects, it is essential to draw on successful experience of developed countries in developing market subjects of agricultural industry. 展开更多
关键词 AGRICULTURAL industry MARKET subjectS SELECTION FA
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Effects Of Subjective Factors On Second Language Learnig(L2L)
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《兵团教育学院学报》 1998年第1期46-49,共4页
In order to promote the activeness and initiative of learners and allow them to take theirlearning advantages,a teacher should be fully aware of the psychological process and models ofL2L.For no matter how well learn... In order to promote the activeness and initiative of learners and allow them to take theirlearning advantages,a teacher should be fully aware of the psychological process and models ofL2L.For no matter how well learners can command a language,their subjective incentives play adecisive role,that is the case particularly for non—Eniglish majors,who are always exposed tocrowded,serious and teacher—centred learning contexts. 展开更多
关键词 TH Effects of subjective factors On Second Language Learnig L2L
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Incidence and related factors of dysphagia in stroke patients
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作者 李红玲 王志红 +2 位作者 吴冰洁 张彤 张玉淼 《中国临床康复》 CSCD 2003年第3期498-499,共2页
AIM:To investigate the incidence and rel ated factors of dysphagia in stroke patients.METHODS:Water drinking test were applied to 100patients who received continuously by neurology and rehabilitation department afte r... AIM:To investigate the incidence and rel ated factors of dysphagia in stroke patients.METHODS:Water drinking test were applied to 100patients who received continuously by neurology and rehabilitation department afte r their condition was stable.RESULTS:Dysphagia incidence of the 100cases of stroke patients was 33%.CONCLUSION:Analysis of related factors indi-cates that incidence of dysphagia has no relationship with sex,age,position of the lesion and complications,but sh ows correlation with status of consc ious-ness,cognitive skill,character of the lesion,position,course,exerc ise abili-ty,daily life activities,buccofac ial apraxia,speech apraxia and aphasia. 展开更多
关键词 病理脑卒中 摄食-吞咽障碍 发病 相关因素
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Investigation and analysis on indoor air quality of large commercial office building in summer 被引量:1
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作者 魏小清 李念平 +2 位作者 周慧 肖书博 胡丽君 《Journal of Southeast University(English Edition)》 EI CAS 2010年第2期243-245,共3页
To study the indoor air qualities(IAQ)of large commercial office buildings in Hunan province of China and the corresponding improvement methods,the IAQ of a large commercial office building in Changsha in July,2008,... To study the indoor air qualities(IAQ)of large commercial office buildings in Hunan province of China and the corresponding improvement methods,the IAQ of a large commercial office building in Changsha in July,2008,is investigated.A questionnaire survey and field tests are used to collect data.According to the data of twelve rooms in this building,objective evaluation and the subjective evaluation of the IAQ are obtained.Almost all of the environmental parameters in these rooms basically meet the standards of the objective evaluation.But the average concentration of carbon dioxide in most rooms cannot reach the value of the cleanliness standards,1 255 mg/m^3.The average acceptability of the IAQ in these rooms is 71%,which is lower than the value of the ASHRAE 55—1992 standards,80%.The proper increase in the wind speed and the indoor fresh air supply can greatly improve the objective evaluation and the subjective evaluation of the IAQ. 展开更多
关键词 large commercial office building indoor air quality(IAQ) objective evaluation subjective evaluation
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一种基于Subject-Action-Object三元组的知识基因提取方法 被引量:15
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作者 许琦 顾新建 《浙江大学学报(工学版)》 EI CAS CSCD 北大核心 2013年第3期385-399,共15页
以专利引证网络为载体,从知识基因稳定性、遗传性以及变异性等基本特征出发,提出一种基于subject-action-object三元组的知识基因提取方法.应用连接度算法分析专利引证关系,挖掘引证专利和被引专利之间继承和发展的知识流,建立知识进化... 以专利引证网络为载体,从知识基因稳定性、遗传性以及变异性等基本特征出发,提出一种基于subject-action-object三元组的知识基因提取方法.应用连接度算法分析专利引证关系,挖掘引证专利和被引专利之间继承和发展的知识流,建立知识进化轨迹;利用文本语法分析技术,从专利权利要求书中提取subject-action-object三元组;基于语义词库WordNet进行语义加工,计算语义相似度,合并同义的subject-action-object三元组,绘制知识基因图谱.从美国专利数据库中采集了5 073项1975—1999年授权的数据挖掘领域的相关专利,分析了专利的地区分布情况和年度分布情况.从NBER(National Bureau of Economic Research)的专利数据集中查询得到专利引证关系,利用网络分析软件Pajek构建专利引证网络,作为实验数据样本,对所提出的知识基因提取方法进行验证.实验结果表明:所提取的subject-action-object三元组具备了知识基因稳定性、遗传性和变异性等特征,可以作为知识基因的一种表现形式. 展开更多
关键词 知识基因 subject-action-object三元组 专利引证网络 知识进化 语义相似度
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