期刊文献+
共找到1,779篇文章
< 1 2 89 >
每页显示 20 50 100
Psychosocial Adaptation in Young and Middle-Aged ACS Patients:An Application of the Self-Regulation Common Sense Model
1
作者 Menghe WANG Na WANG Xiao DU 《Medicinal Plant》 2025年第4期50-54,57,共6页
[Objectives]To systematically evaluate the impact of interventions based on the Common Sense Model of Self-Regulation(CSM)on the psychosocial adaptation of young and middle-aged patients with acute coronary syndrome(A... [Objectives]To systematically evaluate the impact of interventions based on the Common Sense Model of Self-Regulation(CSM)on the psychosocial adaptation of young and middle-aged patients with acute coronary syndrome(ACS),providing evidence-based support for clinical practice.[Methods]A systematic review was conducted using a literature search method,systematically searching through Chinese and English databases such as PubMed,Embase,Cochrane Library,CINAHL,China National Knowledge Infrastructure(CNKI),Wanfang Database,and VIP Database,from the database inception to December 31,2024.The search focused on studies related to the impact of the CSM on the psychosocial adaptation of young and middle-aged ACS patients.Two researchers independently performed literature screening,quality assessment,and data extraction.[Results]A total of 18 studies were included,comprising 12 randomized controlled trials,4 quasi-experimental studies,and 2 cohort studies,involving 2847 young and middle-aged ACS patients.Interventions based on the CSM significantly improved patients disease perception,emotional regulation,self-efficacy,and quality of life.Patients in the intervention group showed significant reductions in anxiety and depression levels,cardiac-related fear,and improvements in disease perception accuracy,treatment adherence,and social function recovery.[Conclusions]Interventions based on the CSM can effectively promote the psychosocial adaptation of young and middle-aged ACS patients,improve their disease perception and emotional state,and enhance their quality of life.It is recommended that this model be widely applied in the clinical care of young and middle-aged ACS patients. 展开更多
关键词 Self-regulation common sense model Acute coronary syndrome Young and middle-aged Psychosocial adaptation REVIEW
暂未订购
Evaluating Common Land Model Energy Fluxes Using FLUXNET Data 被引量:5
2
作者 Xiangxiang ZHANG Yongjiu DAI +8 位作者 Hongzhi CUI Robert E.DICKINSON Siguang ZHU Nan WEI Binyan YAN Hua YUAN Wei SHANGGUAN Lili WANG Wenting FU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2017年第9期1035-1046,共12页
Given the crucial role of land surface processes in global and regional climates, there is a pressing need to test and verify the performance of land surface models via comparisons to observations. In this study, the ... Given the crucial role of land surface processes in global and regional climates, there is a pressing need to test and verify the performance of land surface models via comparisons to observations. In this study, the eddy covariance measurements from 20 FLUXNET sites spanning more than 100 site-years were utilized to evaluate the performance of the Common Land Model (CoLM) over different vegetation types in various climate zones. A decomposition method was employed to separate both the observed and simulated energy fluxes, i.e., the sensible heat flux, latent heat flux, net radiation, and ground heat flux, at three timescales ranging from stepwise (30 rain) to monthly. A comparison between the simulations and observations indicated that CoLM produced satisfactory simulations of all four energy fluxes, although the different indexes did not exhibit consistent results among the different fluxes, A strong agreement between the simulations and observations was found for the seasonal cycles at the 20 sites, whereas CoLM underestimated the latent heat flux at the sites with distinct dry and wet seasons, which might be associated with its weakness in simulating soil water during the dry season. CoLM cannot explicitly simulate the midday depression of leaf gas exchange, which may explain why CoLM also has a maximum diurnal bias at noon in the summer. Of the eight selected vegetation types analyzed, CoLM performs best for evergreen broadleaf forests and worst for croplands and wetlands. 展开更多
关键词 model evaluation common Land model FLUXNET
在线阅读 下载PDF
Development and Evaluation of Species-Specific Biomass Models for Most Common Timber and Fuelwood Species of Bangladesh 被引量:1
3
作者 Mahmood Hossain Mohammad Raqibul Hasan Siddique +4 位作者 S. M. Rubaiot Abdullah Chameli Saha S. M. Zahirul Islam Md. Zaheer Iqbal Mariam Akhter 《Open Journal of Forestry》 2020年第1期172-185,共14页
Allometric biomass models are efficient tools to estimate biomass of trees and forest stands in a non-destructive way. Development of species-specific allometric biomass models requires extensive fieldwork and time. O... Allometric biomass models are efficient tools to estimate biomass of trees and forest stands in a non-destructive way. Development of species-specific allometric biomass models requires extensive fieldwork and time. Our study aimed to generate species-specific allometric biomass models for the most common fuelwood and timber species of Bangladesh. We also wanted to evaluate the performances of our models relative to the performances of regional and commonly used pan-tropical biomass models. We used semi-destructive method that incorporates tree-level volume, species-specific biomass expansion factor (BEF), and wood density. We considered four base models, 1) Ln (biomass) = a + bLn (D);2) Ln (biomass) = a + bLn (H);3) Ln (Biomass) = a + bLn (D^2H);4) Ln (Biomass) = a + bLn (D) + cLn (H) to develop species-specific best-fitted models for Total Above-Ground Biomass (TAGB) and stem biomass. The best-fitted model for each species was selected by the lowest value of Akaike Information Criterion (AIC), Residual Standard Error (RSE) and Root Mean Square Error (RMSE). The derived best-fitted models were then evaluated with respect to regional and pan-tropical models using a separate set of observed data. This evaluation was conducted by computing ME (Model Efficiency) and MPE (Model Prediction Error). The best-fitted allometric biomass models have shown higher model efficiency (0.85 to 0.99 at scale 1) and the lowest model prediction error (-8.94% to 5.27%) compared to the regional and pan-tropical models. All the examined regional and pan-tropical biomass models showed different magnitude of ME and MPE. Some models showed higher level (>0.90 at scale 1) of ME compared to the best-fitted specific species biomass model. 展开更多
关键词 ALLOMETRY BANGLADESH Biomass FUELWOOD Timber Pan-Tropical model Regional common model
在线阅读 下载PDF
Land Response to Atmosphere at Different Resolutions in the Common Land Model over East Asia
4
作者 Daeun KIM Yoon-Jin LIM +1 位作者 Minseok KANG Minha CHO 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2016年第3期391-408,共18页
Towards a better understanding of hydrological interactions between the land surface and atmosphere, land surface mod- els are routinely used to simulate hydro-meteorological fluxes. However, there is a lack of observ... Towards a better understanding of hydrological interactions between the land surface and atmosphere, land surface mod- els are routinely used to simulate hydro-meteorological fluxes. However, there is a lack of observations available for model forcing, to estimate the hydro-meteorological fluxes in East Asia. In this study, Common Land Model (CLM) was used in offline-mode during the summer monsoon period of 2006 in East Asia, with different forcings from Asiaflux, Korea Land Data Assimilation System (KLDAS), and Global Land Data Assimilation System (GLDAS), at point and regional scales, separately. The CLM results were compared with observations from Asiaflux sites. The estimated net radiation showed good agreement, with r = 0.99 for the point scale and 0.85 for the regional scale. The estimated sensible and latent heat fluxes using Asiaflux and KLDAS data indicated reasonable agreement, with r = 0.70. The estimated soil moisture and soil temperature showed similar patterns to observations, although the estimated water fluxes using KLDAS showed larger discrepancies than those of Asiaflux because of scale mismatch. The spatial distribution of hydro-meteorological fluxes according to KLDAS for East Asia were compared to the CLM results with GLDAS, and the GLDAS provided online. The spatial distributions of CLM with KLDAS were analogous to CLM with GLDAS, and the standalone GLDAS data. The results indicate that KLDAS is a good potential source of high spatial resolution forcing data. Therefore, the KLDAS is a promising alternative product, capable of compensating for the lack of observations and low resolution grid data for East Asia. 展开更多
关键词 common Land model Korea Land Data Assimilation System Global Land Data Assimilation System Asi-aflux hydro-meteorological fluxes
在线阅读 下载PDF
Developing biomarkers for neurodegenerative diseases using genetically-modified common marmoset models
5
作者 Ikuo Tomioka Yoshitaka Nagai Kazuhiko Seki 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第7期1189-1190,共2页
Mouse and non-human primate models of neurodegenerative disease:The prevalence of age-related neurodegenerative diseases continues to increase with ever increasing aging population over the age of 60.Although the dif... Mouse and non-human primate models of neurodegenerative disease:The prevalence of age-related neurodegenerative diseases continues to increase with ever increasing aging population over the age of 60.Although the difficulties associated with neurodegenerative diseases present an urgent global issue,there is no effective treatment for these conditions. 展开更多
关键词 Developing biomarkers for neurodegenerative diseases using genetically-modified common marmoset models TET
暂未订购
Common Management Process Model of New TQM Based on the Situation Analysis
6
作者 Kazuhiro Esaki 《Intelligent Information Management》 2016年第6期181-193,共13页
In the previous study, we suggested the concept of new TQM based on the consideration of basic concept of Quality Control. Also, in the previous study, we suggested the target domains and entities of product and proce... In the previous study, we suggested the concept of new TQM based on the consideration of basic concept of Quality Control. Also, in the previous study, we suggested the target domains and entities of product and process based on the TQM Matrix and view point of Three Dimensional Unification Value Models for managing quality of organization systems. Furthermore, in the previous study, we suggest the Common Management Process of organizations. Based on the above suggestion, in this paper, we would like to propose the Common Management Process Model of Total Quality Management based on the consideration of situation analysis and more precise definition of TQM Matrix and Three Dimensional Unification Value Model of “Product and Process”. Improvement of quality and efficiency of organization management can be expected by the integration of conventional different management such as quality assurance, quality improvement, risk management, investment individually from the view point of common management process. 展开更多
关键词 common Management Process model TQM Matrix Three Dimensional Unification Value model Quality Assurance Quality Improvement Static Risk Management Dynamic Risk Management Investment Management Project Management
在线阅读 下载PDF
Common Information Model: A Bus Service for Electric Calculations in AES Eletropaulo
7
作者 Carlos Alexandre de Sousa Penin Wladmir Sybine +1 位作者 Claudio Masanori Matayoshi Flavio Celio de SouzaCerdan 《Journal of Energy and Power Engineering》 2012年第6期965-971,共7页
This paper resumes a research project developed in the concession area of AES Eletropaulo, the largest electrical energy distribution company in Brazil. First, the global standards of information exchange within power... This paper resumes a research project developed in the concession area of AES Eletropaulo, the largest electrical energy distribution company in Brazil. First, the global standards of information exchange within power transmission and distribution area were evaluated, allowing the definition of state of the art on the theme, followed by determining its applications considering technologies already applied by the company. The specifications needed for the generation of a data integration model are adapted to radial overhead network at company concession area. The project developed an intermediary connectivity layer, based on the CIM (common information model), which enables corporative systems to communicate in a standard way, through the use of integrating technologies. It, therefore, enabled modeling all main subjects of an electrical network in an open, extensible and non-proprietary way, in a model that contains classes and attributes of such subjects, as well as their relationships. Calculation and planning products adopted by the company were integrated to the technological layer implemented. 展开更多
关键词 common information model enterprise service bus electrical calculation applications planning applications SOA (service oriented architecture).
在线阅读 下载PDF
Representation of HRTF Based on Common-Pole/Zero Modeling and Principal Component Analysis
8
作者 Wei Chen Xiaogang Wei +1 位作者 Hongxu Zhang Wenpeng He 《Journal on Artificial Intelligence》 2024年第1期225-240,共16页
The Head-Related Transfer Function(HRTF)describes the effects of sound reflection and scattering caused by the environment and the human body when sound signals are transmitted from a source to the human ear.It contai... The Head-Related Transfer Function(HRTF)describes the effects of sound reflection and scattering caused by the environment and the human body when sound signals are transmitted from a source to the human ear.It contains a significant amount of auditory cue information used for sound localization.Consequently,HRTF renders 3D audio accurately in numerous immersive multimedia applications.Because HRTF is high-dimensional,complex,and nonlinear,it is a relatively large and intricate dataset,typically consisting of hundreds of thousands of samples.Storing HRTF requires a significant amount of storage space in practical applications.Based on this,high-dimensional,complex,and nonlinear HRTFs need to be compressed and reconstructed.In this study,inspired by the conventional common-pole/zero model,we propose a method for representing HRTF based on the common-pole/zero model and principal component analysis(PCA).Our method utilizes human auditory features and extends the traditional Common-Acoustical-Pole/Zero(CAPZ)method to estimate the common pole and zero coefficients across multiple subjects.Subsequently,the zero coefficients are compressed using the PCA procedure.Experimental results on the CIPIC database show that the compression ratio can reach 9.5%when the average spectral distortion is less than 2 dB. 展开更多
关键词 HRTF compression common pole/zero modeling PCA
在线阅读 下载PDF
Establishing a Social Governance Model Based on Collaboration,Participation,and Common Interests:Value,Structure and Roadmap
9
作者 Yan Kegao Ren Binbin Ai Qingqing(译) 《Contemporary Social Sciences》 2019年第1期71-84,共14页
The 19th National Congress of the Communist Party of China(CPC)put forward the proposal of establishing a social governance model based on collaboration,participation,and common interests,with the aim of developing ne... The 19th National Congress of the Communist Party of China(CPC)put forward the proposal of establishing a social governance model based on collaboration,participation,and common interests,with the aim of developing new approaches to social governance and further modernizing China’s social system and capacity for governance.As a structuralized social relation addressing diversified governance bodies,the model has consolidated the social governance innovations achieved since the 18th CPC National Congress.Focusing on three dimensions—"value,""structure"and"roadmap,"this paper tries to interpret the value connotations and defining features behind the model and explores its development roadmap.Such a social governance model is a response to political,social and public value appeals,and an adjustment to the order of governance bodies,resource allocations and the benefit distribution structure.Its construction is a systematic and long-term project,which should aim continuously at satisfying people’s ever-higher needs,perfecting laws and regulations,cultivating a pool of specialized organizations and talents,exerting the technology advantages of the Internet in governance,and promoting socialization,legalization,specialization and intellectualization in social development. 展开更多
关键词 SOCIAL GOVERNANCE model COLLABORATION PARTICIPATION common INTERESTS
在线阅读 下载PDF
重大国家战略区域建设的共同富裕效应
10
作者 刘耀彬 陈利鹏 程时雄 《财经研究》 北大核心 2026年第1期19-35,共17页
以高水平区域协调发展推动共同富裕,是迈向中国式现代化的关键环节和内在要求。文章基于2008—2022年中国280个地级及以上城市的面板数据,构建多期双重差分模型,系统考察了重大国家战略区域建设对共同富裕的影响及其机制。研究发现,重... 以高水平区域协调发展推动共同富裕,是迈向中国式现代化的关键环节和内在要求。文章基于2008—2022年中国280个地级及以上城市的面板数据,构建多期双重差分模型,系统考察了重大国家战略区域建设对共同富裕的影响及其机制。研究发现,重大国家战略区域建设显著促进了共同富裕,该结论在考虑内生性问题并经过一系列稳健性检验后依然成立。机制检验表明,重大国家战略区域建设通过促进区域间劳动、资本与技术要素流动,激发区域内结构效应、规模效应和技术效应,加快形成优势互补、高质量发展的区域经济布局,从而有效推动共同富裕。异质性分析显示,在行政级别、城镇化水平以及市场化程度较高的地区,上述促进作用更加显著。分区域分析发现,京津冀协同发展、长江经济带发展和长三角一体化战略的共同富裕效应尤为突出。文章不仅丰富了区域协调发展与共同富裕关系的理论研究,也印证了重大国家战略区域建设在推进中国式现代化、实现全体人民共同富裕中的关键作用,为相关政策优化提供了实践支撑与决策参考。 展开更多
关键词 重大国家战略区域 区域协调发展 共同富裕 多期双重差分模型
原文传递
Security Vulnerability Analyses of Large Language Models (LLMs) through Extension of the Common Vulnerability Scoring System (CVSS) Framework
11
作者 Alicia Biju Vishnupriya Ramesh Vijay K. Madisetti 《Journal of Software Engineering and Applications》 2024年第5期340-358,共19页
Large Language Models (LLMs) have revolutionized Generative Artificial Intelligence (GenAI) tasks, becoming an integral part of various applications in society, including text generation, translation, summarization, a... Large Language Models (LLMs) have revolutionized Generative Artificial Intelligence (GenAI) tasks, becoming an integral part of various applications in society, including text generation, translation, summarization, and more. However, their widespread usage emphasizes the critical need to enhance their security posture to ensure the integrity and reliability of their outputs and minimize harmful effects. Prompt injections and training data poisoning attacks are two of the most prominent vulnerabilities in LLMs, which could potentially lead to unpredictable and undesirable behaviors, such as biased outputs, misinformation propagation, and even malicious content generation. The Common Vulnerability Scoring System (CVSS) framework provides a standardized approach to capturing the principal characteristics of vulnerabilities, facilitating a deeper understanding of their severity within the security and AI communities. By extending the current CVSS framework, we generate scores for these vulnerabilities such that organizations can prioritize mitigation efforts, allocate resources effectively, and implement targeted security measures to defend against potential risks. 展开更多
关键词 common Vulnerability Scoring System (CVSS) Large Language models (LLMs) DALL-E Prompt Injections Training Data Poisoning CVSS Metrics
在线阅读 下载PDF
Information Commons的理性审视 被引量:24
12
作者 杨广锋 《图书馆杂志》 CSSCI 北大核心 2006年第10期4-7,共4页
文摘Information Commons(信息共享中心)是20世纪90年代后期兴起的一种新型图书馆服务模式。本文论述了IC兴起的背景,分析了其构成和服务模式;并从信息服务模式演变、图书馆功能发挥、信息共有理念等角度对其进行审视,揭示了IC“空间共... 文摘Information Commons(信息共享中心)是20世纪90年代后期兴起的一种新型图书馆服务模式。本文论述了IC兴起的背景,分析了其构成和服务模式;并从信息服务模式演变、图书馆功能发挥、信息共有理念等角度对其进行审视,揭示了IC“空间共用、资源共用”、“用户交流互动”、“维护信息共有”等核心理念。 展开更多
关键词 信息共享中心 服务模式 信息共有 开放获取
在线阅读 下载PDF
含隔直电容的移相全桥变换器EMI抑制方案研究
13
作者 贾红云 胡威 沈湛 《电子元件与材料》 北大核心 2026年第1期85-94,104,共11页
在移相全桥变换器中,隔直电容虽能抑制变压器偏磁饱和,但其两端的高频电压分量却会加剧传导电磁干扰(EMI)的复杂性,而现有变压器模型难以精确揭示由此产生的共模噪声耦合机制。为解决上述问题,首先基于位移电流守恒原理,构建了一个能够... 在移相全桥变换器中,隔直电容虽能抑制变压器偏磁饱和,但其两端的高频电压分量却会加剧传导电磁干扰(EMI)的复杂性,而现有变压器模型难以精确揭示由此产生的共模噪声耦合机制。为解决上述问题,首先基于位移电流守恒原理,构建了一个能够表征绕组内部位移电流路径与绕组间寄生电容定量关系的变压器两电容等效模型。继而,利用该模型对共模干扰回路进行简化分析,据此提出了三种协同作用的抑制策略:谐振腔对称结构法、平衡电容法、辅助变压器对消法。基于一台1400 W原理样机的实验结果表明,该综合抑制方案在150 kHz~30 MHz频段内,能将共模噪声的谐振尖峰降低约20 dB。实验结果验证了所提变压器两电容模型的正确性,以及基于该模型所设计的EMI综合抑制方案的有效性。 展开更多
关键词 隔直电容 电磁干扰 共模噪声 移相全桥 变压器模型 对消
在线阅读 下载PDF
国外图书馆Information Commons的兴起和发展及其启示 被引量:3
14
作者 程红梅 《图书馆建设》 北大核心 2007年第6期72-74,共3页
Information Commons(IC,信息共享中心)是20世纪90年代国外高校图书馆为适应用户需求的变化而建立起来的一种新型的图书馆服务模式。本文阐明了IC兴起的背景及其发展和应用;分析了其构成要素和服务模式;从4个方面探讨了对我国图书馆的... Information Commons(IC,信息共享中心)是20世纪90年代国外高校图书馆为适应用户需求的变化而建立起来的一种新型的图书馆服务模式。本文阐明了IC兴起的背景及其发展和应用;分析了其构成要素和服务模式;从4个方面探讨了对我国图书馆的启示和借鉴作用。 展开更多
关键词 信息共享中心 服务模式 图书馆
在线阅读 下载PDF
基于自我调节常识理论模型的2型糖尿病患者健康信息寻求行为现状及影响因素分析
15
作者 何文苡 李琦 +1 位作者 李玉玲 李薇 《中国实用护理杂志》 2026年第6期423-432,共10页
目的基于自我调节常识理论模型了解2型糖尿病患者健康信息寻求行为的现状、相关影响因素以及作用路径,为健康信息宣传优化政策提供依据。方法采用便利抽样法选取2024年6—12月于广东省第二中医院内分泌科就诊的2型糖尿病患者为调查对象... 目的基于自我调节常识理论模型了解2型糖尿病患者健康信息寻求行为的现状、相关影响因素以及作用路径,为健康信息宣传优化政策提供依据。方法采用便利抽样法选取2024年6—12月于广东省第二中医院内分泌科就诊的2型糖尿病患者为调查对象。采用一般资料调查表、健康信息寻求行为量表、糖尿病管理自我效能量表、病人自我管理任务感知和支持需求问卷进行横断面调查。结果共发放256份问卷,回收248份有效问卷,有效回收率为96.88%。248例患者中男139例,女109例,年龄为(59.96±11.40)岁。2型糖尿病患者健康信息寻求行为、糖尿病管理自我效能、自我管理任务感知和自我管理支持需求得分分别为(3.55±0.54)、(121.71±30.51)、(34.93±9.14)、(28.98±11.41)分;患者健康信息寻求行为的主要影响因素包括年龄、受教育程度、糖尿病病程、住院次数以及糖尿病管理自我效能、自我管理任务感知和自我管理支持需求(t值为-5.47~7.37,均P<0.05);健康信息寻求行为与糖尿病管理自我效能、自我管理任务感知呈正相关(r=0.558、0.730,均P<0.05),与自我管理支持需求呈负相关(r=-0.469,P<0.05);自我管理任务感知和自我管理支持需求在糖尿病管理自我效能和健康信息寻求行为之间均起部分中介作用,效应值分别为0.196、0.037(均P<0.05);其中以自我管理任务感知的中介效应更强,而自我管理支持需求作用相对有限。自我管理任务感知的中介效应占比为46.23%。结论2型糖尿病患者的健康信息寻求行为水平一般,既受到自我效能的直接影响,也通过自我管理任务感知和自我管理支持需求发挥中介作用;据此,未来在临床实践中需要帮助患者明确自我管理任务,为其自我管理提供标准化支持,针对其健康信息寻求行为特点提供个性化护理方案,有效转化临床效益。 展开更多
关键词 糖尿病 2型 健康信息寻求行为 自我调节常识模型 影响因素分析
原文传递
网络环境下多元著作权保护制度的建构——以“Creative Commons”机制与合理使用为视角 被引量:9
16
作者 肖尤丹 《图书情报知识》 CSSCI 北大核心 2007年第3期10-14,共5页
“Creative Commons”授权许可机制的实施必然在一定程度上对传统著作权制度造成影响,使得著作权学者必须开始考虑现有的著作权体系是否能够支持这一在网络环境下逐步流行的授权许可协议。在一定条件下,这一系列协议形式会在很大程度和... “Creative Commons”授权许可机制的实施必然在一定程度上对传统著作权制度造成影响,使得著作权学者必须开始考虑现有的著作权体系是否能够支持这一在网络环境下逐步流行的授权许可协议。在一定条件下,这一系列协议形式会在很大程度和范围上,让一般公众和使用者得以规避愈来愈倾向加强网络著作权保护的相关著作权法律。从另一个角度来看,这种网络自发采用的许可合同形式很可能会“改写版权法的规则”,促进建立全新的、多层次的、立体的合理使用法律体系,并在此基础上推动著作权法的相关发展,从而在网络环境下建立更合理、更有弹性的著作权保障模式。 展开更多
关键词 “创作共用”合理使用 弹性机制
在线阅读 下载PDF
基于InVEST-MCR模型的奉贤新城鸟类生态廊道识别与优化
17
作者 贺坤 唐运泽 +2 位作者 卯响 张德顺 李杰 《华中农业大学学报》 北大核心 2026年第1期52-63,共12页
生态廊道识别与构建是维系生态系统完整性与促进物种迁移的重要手段,为了构建科学、可实施的鸟类生态廊道识别与优化框架,以快速城市化的上海市奉贤新城为研究区域,选取麻雀(Passer montanus)、乌鸫(Turdus merula)、黑水鸡(Gallinula c... 生态廊道识别与构建是维系生态系统完整性与促进物种迁移的重要手段,为了构建科学、可实施的鸟类生态廊道识别与优化框架,以快速城市化的上海市奉贤新城为研究区域,选取麻雀(Passer montanus)、乌鸫(Turdus merula)、黑水鸡(Gallinula chloropus)、牛背鹭(Bubulcus coromandus)4种常见鸟类为焦点物种,综合运用生态系统服务和权衡的综合评估模型(InVEST)与最小累积阻力(MCR)模型模拟区域生态廊道格局,并结合实地调查数据建立评价指标体系进行验证。结果显示:4种鸟类的符合高质量生境标准的斑块面积总和(即生态源地面积)分别为18.2、19.3、10.4和13.5 km^(2),主要分布于林地、灌草地、耕地及河塘;共识别出66条生态廊道,奉贤新城核心区廊道数量较少,断裂风险高、连接度弱,而外围水域、农田与林地密集区形成了相对完整的廊道网络;优化后4种鸟类廊道控制点偏离度分别降低0.25、0.15、0.16和0.27,生态连通性显著提升。 展开更多
关键词 生态廊道 InVEST模型 MCR模型 城市常见鸟类 城市规划
在线阅读 下载PDF
农村产业融合对于共同富裕实现的影响分析
18
作者 李晓东 华其运 《黑河学院学报》 2026年第1期67-72,90,共7页
在梳理现有研究成果基础上,构建农村产业融合推动共同富裕的理论分析框架,以2011—2022年中国30个省份的面板数据为依托,运用双向固定效应模型与中介效应模型,就农村产业融合对共同富裕的促进路径展开实证考察。研究发现,农村产业融合... 在梳理现有研究成果基础上,构建农村产业融合推动共同富裕的理论分析框架,以2011—2022年中国30个省份的面板数据为依托,运用双向固定效应模型与中介效应模型,就农村产业融合对共同富裕的促进路径展开实证考察。研究发现,农村产业融合对共同富裕有明显的直接催化作用,该结论经多重稳健性检验和内生性处理后仍成立;机制分析结果表明,产业结构升级是关键中介路径,农村产业融合通过推动产业结构升级促进共同富裕;异质性分析表明,这种影响存在区域差异,东部地区的促进效应显著强于非东部地区。并提出延伸农村产业融合的多维路径、强化产业结构升级的传导作用、实施区域差异化的融合策略等几点政策建议。 展开更多
关键词 农村产业融合 共同富裕 双向固定效应模型 中介效应模型
在线阅读 下载PDF
Information Commons的结构及其模型研究 被引量:2
19
作者 陆宝益 《图书情报知识》 CSSCI 北大核心 2011年第5期101-108,共8页
IC的理论构成可划分为物理空间、虚拟空间、政策空间和情感空间等四个维面/方面。从建设所涉及的范围及其功能的发挥等因素考虑,IC分为宏观层次上的全球IC巨/型IC、中观层次上的区域/系统IC和微观层次上的机构/组织IC等三大类型。不同... IC的理论构成可划分为物理空间、虚拟空间、政策空间和情感空间等四个维面/方面。从建设所涉及的范围及其功能的发挥等因素考虑,IC分为宏观层次上的全球IC巨/型IC、中观层次上的区域/系统IC和微观层次上的机构/组织IC等三大类型。不同层次类型的IC,具有不同的功能与特点,其结构模型也各不相同。 展开更多
关键词 信息共享空间 数字图书馆 理论构成 结构模型
在线阅读 下载PDF
Information Commons的研究及其在国内高校的应用
20
作者 许晓斌 《高校图书馆工作》 CSSCI 2010年第4期76-78,共3页
文章主要研究信息共享区(IC-Information Commons)的实践和相关理论研究,及其在国内高校的应用。IC高度整合了图书馆的信息资源和各部门及功能,为用户提供平等的、开放的、一站式的信息及服务。IC模式是当今图书馆服务模式发展的主流,... 文章主要研究信息共享区(IC-Information Commons)的实践和相关理论研究,及其在国内高校的应用。IC高度整合了图书馆的信息资源和各部门及功能,为用户提供平等的、开放的、一站式的信息及服务。IC模式是当今图书馆服务模式发展的主流,国内高校图书馆应当结合自己的实际情况尝试建立IC,为用户提供一个更适于研究和学习的有效集成图书馆各种功能的新环境。 展开更多
关键词 信息共享区 服务模式 高校图书馆
在线阅读 下载PDF
上一页 1 2 89 下一页 到第
使用帮助 返回顶部