期刊文献+
共找到1,931篇文章
< 1 2 97 >
每页显示 20 50 100
Effects of King’s Theory of Goal Attainment Combined with Teach-Back Method on Improving Patients’ Standardization Rate of Eye Drop Use
1
作者 Qiuying Huang Guilian Jie Xiaohong Liu 《Journal of Clinical and Nursing Research》 2024年第12期22-27,共6页
Objective:To explore the effect of King’s Theory of Goal Attainment combined with teach-back method on improving the standardization rate of eye drop use in patients.Methods:A total of 200 patients who used more than... Objective:To explore the effect of King’s Theory of Goal Attainment combined with teach-back method on improving the standardization rate of eye drop use in patients.Methods:A total of 200 patients who used more than two types of eye drops in the Department of Ophthalmology of our hospital were selected as the research subjects,and were randomly divided into an observation group and a control group.The control group was given routine health education,while the observation group was given King’s Theory of Goal Attainment combined with teach-back method on the basis of the control group.The standardization rate of eye drop use,knowledge awareness rate,and nursing satisfaction were compared between the two groups before and after the intervention.Results:After the intervention,the standardization rate of eye drop use,the awareness rate of eye drop knowledge,and the nursing satisfaction of the observation group were significantly higher than those of the control group(P<0.05).Conclusion:King’s Theory of Goal Attainment combined with teach-back method can effectively improve the standardization rate of eye drop use in patients,increase their awareness of eye drop knowledge,and improve nursing satisfaction,which is worthy of clinical application. 展开更多
关键词 King’s theory of Goal Attainment Teach-back method eye drops Standardization rate
下载PDF
Cooperative Production and Adaptive Momentum:The Constructive Logic of the New Rural Governance System in Ethnic Regions of China
2
作者 Xintao Li Yutong Xiao Jing Zhang 《Macro Management & Public Policies》 2024年第2期1-19,共19页
The traditional governance model and hierarchical structure in China’s ethnic minority regions are inadequate for advancing farmers’income and modernizing rural governance.Moreover,these traditional structures have ... The traditional governance model and hierarchical structure in China’s ethnic minority regions are inadequate for advancing farmers’income and modernizing rural governance.Moreover,these traditional structures have resulted in governance challenges including unequal allocation of rural resources,absence of villagers’agency,and lack of resource transparency.This study delves into the systematic structure of the“rural governance system in ethnic minority areas”.This study samples advanced ethnic minority township governance models from seven provinces,including Guangxi,Qinghai,and the Tibet Autonomous Region in China,and employs Grounded Theory to encode and analyze sub-elements within their governance systems.Subsequently,it investigates the construction logic of a novel rural governance system.(1)The research reveals that primary-level Party organization play a pivotal role in connecting bilateral delegated agency relationships,thereby establishing a mutually cooperative“chain-like”structure in village governance systems within ethnic minority areas.(2)The study identifies two cooperative production paths of the new rural governance in ethnic minority areas:top-down field-oriented party-government integrated governance and bottom-up legalized multi-subject collaborative governance.(3)By employing“integration means-bilateral mobilization”as the mechanism for momentum adjustment and relying on social autonomy,grassroots party organizations shape the momentum adjustment of the new rural governance system in ethnic minority areas.They do so by leveraging both formal and informal governance methods within this framework.Consequently,this study offers pertinent policy recommendations aimed at resolving the challenges of interest coordination and uneven development in ethnic minority areas amidst China’s governance modernization efforts. 展开更多
关键词 Rural governance system Political party organization Grounded theory Ethnic minority regions
下载PDF
THE COMBINATION PREDICTION OF TRANSMEMBRANE REGIONS BASED ON DEMPSTER-SHAFER THEORY OF EVIDENCE
3
作者 DengXinyang XuPeida DengYong 《Journal of Electronics(China)》 2012年第1期142-147,共6页
Transmembrane proteins are some special and important proteins in cells. Because of their importance and specificity, the prediction of the transmembrane regions has very important theoretical and practical significan... Transmembrane proteins are some special and important proteins in cells. Because of their importance and specificity, the prediction of the transmembrane regions has very important theoretical and practical significance. At present, the prediction methods are mainly based on the physicochemical property and statistic analysis of amino acids. However, these methods are suitable for some environments but inapplicable for other environments. In this paper, the multi-sources information fusion theory has been introduced to predict the transmembrane regions. The proposed method is test on a data set of transmembrane proteins. The results show that the proposed method has the ability of predicting the transmembrane regions as a good performance and powerful tool. 展开更多
关键词 Transmembrane regions PREDICTION Dempster-Shafer theory of evidence PROTEINS
下载PDF
Functional connectivity of paired default mode network subregions in patients with eye trauma
4
作者 Zheng-Mao Xing Dan Song +12 位作者 Jin-Yu Hu Xian-Mei Zhou Xuan Liao Cheng Chen Hong Wei Min Kang Qian Ling Liang-Qi He Zhen-Zhe Liu Jie Zou Xu Chen Zhen-Kai Wu Yi Shao 《International Journal of Ophthalmology(English edition)》 SCIE CAS 2024年第12期2248-2255,共8页
AIM:To study functional brain abnormalities in patients with eye trauma(ET)and to discuss the pathophysiological mechanisms of ET.METHODS:Totally 31 ET patients and 31 healthy controls(HCs)were recruited.The age,gende... AIM:To study functional brain abnormalities in patients with eye trauma(ET)and to discuss the pathophysiological mechanisms of ET.METHODS:Totally 31 ET patients and 31 healthy controls(HCs)were recruited.The age,gender,and educational background characteristics of the two groups were similar.After functional magnetic resonance imaging(fMRI)scanning,the subjects’spontaneous brain activity was evaluated with the functional connectivity(FC)method.Receiver operating characteristic(ROC)curve analysis was used to classify the data.Pearson’s correlation analysis was used to explore the relationship between FC values in specific brain regions and clinical behaviors in patients with ET.RESULTS:Significantly increased FC between several regions was identified including the medial prefrontal cortex(MPFC)and left hippocampus formations(HF),the MPFC and left inferior parietal lobule(IPL),the left IPL and left medial temporal lobe(MTL),the left IPL and right MTL,and the right IPL and left MTL.No decreased region-to-region connectivity was detected in default mode network(DMN)sub-regions in patients with ET.Compared with HCs,ET patients exhibited significantly increased FC between several paired DMN regions,as follows:posterior cingulate cortex(PCC)and right HF(HF.R,t=2.196,P=0.032),right inferior parietal cortices(IPC.R)and left MTL(MTL.L,t=2.243,P=0.029),and right MTL(MTL.R)and HF.R(t=2.236,P=0.029).CONCLUSION:FC values in multiple brain regions of ET patients are abnormal,suggesting that these brain regions in ET patients may be dysfunctional,which may help to reveal the pathophysiological mechanisms of ET. 展开更多
关键词 eye trauma functional connectivity brain region
下载PDF
An Analysisof Pecolain The Bluest Eye Basedon Aristotle's Theoryof Tragedy
5
作者 石尹惠子 黄子夜 《海外英语》 2018年第15期188-190,共3页
Based on the theory of tragedy in Poetics by Aristotle, this paper analyzes Pecola, a protagonist in The Bluest Eye written by Toni Morrison, from the four aspects of the"completeness"of plot, the"Rever... Based on the theory of tragedy in Poetics by Aristotle, this paper analyzes Pecola, a protagonist in The Bluest Eye written by Toni Morrison, from the four aspects of the"completeness"of plot, the"Reversal"and"Recognition"of plot, the Character and the tragic effect: pity and fear to prove that the theory of tragedy is still practical and conductive to the analysis of literary works even until nowadays. 展开更多
关键词 the theory of tragedy the Bluest eye ARISTOTLE Pecola
下载PDF
Integration Path of Coastal Leisure Tourism Resources in Rizhao Based on Regional Economic Theory 被引量:1
6
作者 QIN Zhiyu HU Xiuli DING Mingjun 《Journal of Landscape Research》 2018年第3期120-122,共3页
Aiming at the rapid development of leisure tourism in coastal cities,the regional economic theory was first analyzed based on existing studies,the integration path of coastal leisure tourism resources in Rizhao was ex... Aiming at the rapid development of leisure tourism in coastal cities,the regional economic theory was first analyzed based on existing studies,the integration path of coastal leisure tourism resources in Rizhao was explored using the theory of unbalanced growth of regional economy and the theory of industrial agglomeration,and four countermeasures were proposed for the development of coastal leisure tourism in Rizhao City. 展开更多
关键词 Rizhao City REGIONAL ECONOMIC theory TOURISM RESOURCES PATH
下载PDF
Theory and Practice of Marine Regional Management in China
7
作者 Shangjie JI Qunzhen QU 《Asian Agricultural Research》 2014年第9期19-22,共4页
With the development of marine economy in coastal provinces and cities,there comes a series of environmental problems. Marine regional management,as a completely new marine management mode,transforms traditional manag... With the development of marine economy in coastal provinces and cities,there comes a series of environmental problems. Marine regional management,as a completely new marine management mode,transforms traditional management mode and can protect marine ecosystem. Thus,the marine regional management is feasible and applicable in China. This paper firstly discussed connotation and development of the marine regional management in China and pointed that the marine regional management is integrated management of a certain marine region. Next,it summarized characteristics of the marine regional management at current stage,for example,land-based pollution of trans-geographic system and marine management under regional government cooperative mechanism. Finally,it came up with recommendations including combining theory and practice of the marine regional management,and establishing marine regional management system as soon as possible,to realize benign interaction and sustainable development of marine economy and ecological environment. 展开更多
关键词 China MARINE REGIONAL MANAGEMENT theory PRACTICE
下载PDF
The Enlightenment of Regional Spatial Structure Theory to Rural Revitalization Strategy
8
作者 Jingjing ZHANG Ni DAN Yan GAO 《Agricultural Biotechnology》 CAS 2022年第6期139-144,154,共7页
The rural revitalization strategy is a macro-strategic guide to solve the problem of"weak links"in the coordinated development of rural and urban regions.Geography responded positively to the national strate... The rural revitalization strategy is a macro-strategic guide to solve the problem of"weak links"in the coordinated development of rural and urban regions.Geography responded positively to the national strategy and made a preliminary discussion on the scientific theoretical basis and research direction of rural revitalization strategy.The paper integrated application of the spatial structure theory of geography and the time-space research scientific thinking,respectively discussed the core edge theory,growth pole and point axis theory,theory of stage of industrialization and urbanization,rural settlement type,infrastructure construction patterns,such as the theoretical guidance and application of strategy of rejuvenating rural to rural revitalization of the full implementation of the strategy to provide theoretical support and practical guidance. 展开更多
关键词 Rural revitalization strategy Regional economic Spatial structure theory
下载PDF
A Review on China’s Transportation Development Theory from the Perspective of Regional Economics
9
作者 Wu Zhenming 《Contemporary Social Sciences》 2021年第4期40-52,共13页
Transportation is the lifeline of human civilization and an important component of the infrastructure for economic growth.As transportation is closely related to regional economic development,the summarization of Chin... Transportation is the lifeline of human civilization and an important component of the infrastructure for economic growth.As transportation is closely related to regional economic development,the summarization of China's transportation development theory from the perspective of regional economics will be conducive to clarifying the relationships between transportation and regional economic development and providing basic theoretical support for regional economic research and policy application.From the perspective of regional economics,China’s transportation development theory falls into two categories:transportation resource allocations,and the interactions between transportation and economic development.In recent years,there has been a trend toward the integration of transportation development research with regional economic growth,and a deeper understanding of the relationships between them has been achieved. 展开更多
关键词 transportation development theory regional economics China
下载PDF
RESEARCH ON THE THEORY AND METHODS OF COMPREHENSIVE EVALUATION OF REGIONAL COAL RESOURCES
10
《石家庄经济学院学报》 1995年第S1期99-105,共7页
consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of region... consists of forecasting for the total reserves of regional mineral resources and evaluation,compreIn general,based on evaluated objects and factors involved,evaluation of mineral resources hensive evaluation of regional mineral resources, and economic and technical evaluation of deposits. Here a region can be a country, a province, or a mining area, while a deposit is mainly related to a single type of mineral, although it can contain more than one types of minerals. In the past, to assess mineral resources was primarily to evaluate and forecast the total reserves of regional mineral resources. With the advancement of science, technology, and economy, the evaluation of mineral resources has developed from forecasting the reserves of them to comprehensively evaluating them on the basis of numerous factors. 展开更多
关键词 RESEARCH ON the theory AND METHODS of COMPREHENSIVE EVALUATION of REGIONAL COAL RESOURCES
下载PDF
Reformulation of Relativistic Quantum Field Theory Using Region-Like Idealization of the Elementary Particle
11
作者 Elsadig Naseraddeen Ahmed Mohamed 《Journal of Modern Physics》 2015年第11期1711-1720,共10页
The existence of any elementary particle in universe requires the existence of some region of universe occupied by it. By taking the volume of this occupied region, the author will reformulate the relativistic quantum... The existence of any elementary particle in universe requires the existence of some region of universe occupied by it. By taking the volume of this occupied region, the author will reformulate the relativistic quantum field theory using new 3-dimensional region-like idealization of elementary particles and hereinafter will call the total volume of all regions occupied by the elementary constituent particles of the quantum system the occupied volume. Also the author will call the set of all regions of universe filled by elementary constituent particles of the quantum system the occupied path. Always any quantum system is existed at a head of its occupied path. This path is growing by mutual filling and leaving regions of universe by its elementary constituent particles. The conservation of this elementary constituent particle requires the conservation of its occupied volume during this process. This requirement could be summarized by the following conditions: 1) the total volume of all regions of universe filled by the elementary constituent particles of the quantum system minus the total volume of all regions of universe left by these elementary constituent particles must be equal to the occupied volume of the quantum system;2) the total increase in the occupied volume of the quantum system due to the absorption of another elementary particles from outside its occupied regions minus the total decreasing in its occupied volume due to the emission of another elementary particles outside its occupied regions must be equal to the occupied volume of it. The wave-particle duality of the elementary constituent particles implied accumulation of them as the finite set of interfered waves. This accumulation of elementary constituent particles causes the absolute probabilistic nature of event of finding the elementary consistent particle in specified interfered wave, and hence the mathematical representation of this interfered wave should take into account the value of probability amplitude of finding an elementary particle inside the region occupied specified interfered wave. In quantum theory this probability amplitude corresponds to complex amplitude of the wave function of interfered wave. Also in Hilbert’s representation of the quantum theory these wave functions are representing the components of the quantum state vector. In this paper the author will develop the transformation theory of the region-like quantum state of the quantum system. 展开更多
关键词 Region-Like IDEALIZATION Creation ANNIHILATION Animation Occupied Volume Occupied Path Relativistic Quantum Field theory
下载PDF
Regional Innovation System: Theoretical Approach and Empirical Study of ChinaAPPROACH AND EMPIRICAL STUDY OF CHINA 被引量:1
12
作者 LIUShu-guang CHENCai 《Chinese Geographical Science》 SCIE CSCD 2003年第3期193-198,共6页
Regional innovation system (RIS) is the new research field of modern economicgeography in the age of knowledge economy. Based on the researches of regional economic geography,the authors of the paper consider RIS as t... Regional innovation system (RIS) is the new research field of modern economicgeography in the age of knowledge economy. Based on the researches of regional economic geography,the authors of the paper consider RIS as the integrated and interactive systems with innovationmilieu, elements, units, structure and functions. Five aspects of evaluation indicators includinginnovation input scale and output scale, innovation milieu transition, innovation inner operation,as well as innovation outer impact are worked out for final indicators of RIS scale and quality.According to different RIS situations, three patterns of independent, imitative and cooperativedevelopment are put forward for choosing. At the latter part of the paper, we select 12 provincialregions (including three municipalities and one autonomous region) of China for empirical study. Theresults show that there exists great difference among each region from the aspects of innovationscale and quality mainly owning to the diversification of RIS social and economic milieu, the majorinnovative units of enterprises, universities and R&D institutes. Finally, the paper points out theinnovation development decisions for each region. 展开更多
关键词 regional innovation system theory METHODS cases of China
下载PDF
THE EXISTENCE OF BUCKLED STATES ON A PERFORATED THIN PLATE
13
作者 程昌钧 杨骁 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1992年第8期725-736,共12页
On the bafis of the generalized von K(?)rm(?)n theory for perforated thin plates established in [1,2], the existence of buckled states for perforated plates subjected to self-equilibrating inplane forces along each ed... On the bafis of the generalized von K(?)rm(?)n theory for perforated thin plates established in [1,2], the existence of buckled states for perforated plates subjected to self-equilibrating inplane forces along each edge systematically is investigated. This work completely generalizes the results in [3, 4]. 展开更多
关键词 perforated plate multi-connected region modified von Krmn theory buckled state bifurcation theorem
下载PDF
The Central Asian Regional Security Complex Revisited:Understanding the Implications of the US Retreat From Afghanistan
14
作者 Samuel Elzinga 《International Relations and Diplomacy》 2021年第11期447-479,共33页
On February 29,2020,President Donald Trump announced the United States signed a peace agreement with the Taliban,signifying the United States‟intention of leaving Afghanistan in the near future.Though the global pande... On February 29,2020,President Donald Trump announced the United States signed a peace agreement with the Taliban,signifying the United States‟intention of leaving Afghanistan in the near future.Though the global pandemic has altered US withdrawal plans,the question still remains:What will become of the Central Asian regional security complex following America‟s exit?Buffered by the presence of the United States since 2001,the Central Asian republics now once again find themselves at a crossroads to either rely on individual defense services or to develop increased military cooperation with interested states.Recognizing Central Asia‟s history of collaboration among its regional and near-regional countries,I argue that the Central Asian Republics of Afghanistan,Kazakhstan,Kyrgyzstan,Tajikistan,Turkmenistan,and Uzbekistan will seek to develop stronger security ties with neighboring regional security complexes(RSCs),namely the South Asian,Russian,and Chinese RSCs.With decreased American influence,each of the states in these RSCs is rushing to fill the void of influence in order to capitalize on Central Asia‟s geostrategic position in Eurasia as well as secure itself from the threat of non-state actors still prevalent in the region.I further argue that the states in the Central Asian RSC additionally seek these same benefits and security,but receive them to a much lesser extent than their more powerful regional neighbors.Understanding how the American withdrawal from Afghanistan will impact Central Asian RSC relations can provide insight into how great power vacuums are filled both by great powers and regional powers alike. 展开更多
关键词 Central Asia REGIONALISM AFGHANISTAN CONSTRUCTIVISM security Regional Security theory(RSCT) TERRORISM CONFLICT
下载PDF
The Morphological Analysis of Folktales of Tu Nationality in Hehuang Region in Northwest China
15
作者 ZHAO Zhi-yi 《Journal of Literature and Art Studies》 2016年第11期1293-1303,共11页
The Tu nationality (also called "Tu people" or "Tus" in the paper), one of the multiple ethnic minorities in the Hehuang Region (河湟地区) between Gansu (甘肃) and Qinghai (青海) Provinces in the northwest... The Tu nationality (also called "Tu people" or "Tus" in the paper), one of the multiple ethnic minorities in the Hehuang Region (河湟地区) between Gansu (甘肃) and Qinghai (青海) Provinces in the northwest China, has no written language of their own, but has already created the abundant and varied colorful literary genres. Since the 1980s, folktales, as the main literary product popular in the region, have received literary criticisms and reviews from scholars and researchers in China, based on the socialist realism dominant in China in the 20th century that emphasized more on contents, motifs and even ideological significance. So far, no breakthroughs have been made in their studies even if some young scholars have tried from the formalist viewpoints. Therefore, this paper attempts to make a morphological analysis of the Tus' folktales by adopting Propp's theories, trying to find out the morphological narrative model beneath the language level of the folktales. Through the studies, we can see that collective awareness bonded by kinship is more emphasized in Tus' culture, and almost all tales end with good defeating evil. Therefore, the studies of these folktales will help us deep understand Tus' psychological conditions and positive cultural life. 展开更多
关键词 morphological analysis folktales of Tu nationality Hehuang Region Propp's theory creative rules collectiveness
下载PDF
Research on the field emission mechanism of nano-structured carbon film
16
作者 王艳燕 李英爱 +1 位作者 许基松 顾广瑞 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第8期522-526,共5页
The field emission (FE) characteristics of nano-structured carbon films (NSCFs) are investigated. The saturation behaviour of the field emission current density found at high electric field E cannot be reasonably ... The field emission (FE) characteristics of nano-structured carbon films (NSCFs) are investigated. The saturation behaviour of the field emission current density found at high electric field E cannot be reasonably explained by the traditional Fowler-Nordheim (F-N) theory. A three-region E model and the curve-fitting method are utilized for discussing the FE characteristics of NSCFs. In the low, high, and middle E regions, the FE mechanism is reasonably explained by a modified F-N model, a corrected space-charge-limited-current (SCLC) model and the joint model of F N and SCLC mechanism, respectively. Moreover, the measured FE data accord well with the results from our corrected theoretical model. 展开更多
关键词 nano-structured carbon films field emission F-N theory space charge limited current three-region electric field model
下载PDF
Influential Factors in Employment Location Selection Based on “Push-Pull” Migration Theory—A Case Study in Three Gorges Reservoir Area in China 被引量:10
17
作者 XU Ding-de ZHANG Ji-fei +3 位作者 XIE Fang-ting LIU Shao-quan CAO Meng-tian LIU En-lai 《Journal of Mountain Science》 SCIE CSCD 2015年第6期1562-1581,共20页
In China, farmers employed in non-farm work have become important socio-economic actors, but few studies have examined the farmers' perspective in making their work location choices. Based on "push-pull"... In China, farmers employed in non-farm work have become important socio-economic actors, but few studies have examined the farmers' perspective in making their work location choices. Based on "push-pull" migration theory, this paper utilizes sectional data from a 2013 survey of farmers in China's Three Gorges Reservoir area to empirically analyze the factors influencing migrant workers' choice of employment location. The results indicate that 60.46% of laborers have migrated from their home province, whereas 39.54% have remained in their home province. Focusing on personal, household, and community characteristics—in addition to the economic characteristics of the sample counties—multinomial logistic regression models reveal that farmer-laborers' employment location decisions are influenced by their personal capital endowment(age, years of education and social networks), family structure(the number of laborers, elders, children and students), home village characteristics(location, economic development level and the degree of relief of the land) and home county economic development level. Notably, male and female laborers' location decisions reveal a converging trend, and their differences are not pronounced. Per capita arable land area has little influence on location decisions, whereas the educational level of laborers has a significant impact. The results differ significantly from those found in previous studies. 展开更多
关键词 off-farm employment Location selection Migrants Push-Pull migration theory Three Gorges Reservoir region China
下载PDF
Optimization Study of Outburst Prevention Measures for Tuzhu Coal Mine Based on Fixed Weight Clustering Analysis 被引量:3
18
作者 Wenke Luo Shiliang Shi +3 位作者 Yi Lu Shenghua Zou Zaian Chen Liliang Chen 《Journal of Geoscience and Environment Protection》 2016年第1期153-161,共9页
Affected by many involved factors, different dimensions, data with large difference, incomplete information and so on, the most optimal selection of regional outburst prevention measures for outburst mine has become a... Affected by many involved factors, different dimensions, data with large difference, incomplete information and so on, the most optimal selection of regional outburst prevention measures for outburst mine has become a complicated system project. The traditional way of outburst prevention measure selection belongs to qualitative method, which may cause high-cost of gas control, huge quantities of drilling work, long construction time and even secondary disaster. To solve the above-mentioned problems, in light of occurrence status of coal seam gas in No. 21 mining area of Jinzhushan Tuzhu Mine, through grey fixed weight clustering theory and a combination method of qualitative and quantitative analysis, the judging model with multi-objective classification for optimization of outburst prevention measures was established. The three weight coefficients of outburst prevention technology scheme are sorted, in order to determine the advantages and disadvantages of each outburst prevention technology scheme under the comprehensive evaluation of multi-target. Finally, the problem of quantitative selection for regional outburst prevention technology scheme is solved under the situation of multi-factor mode and incomplete information, which provides reasonable and effective technical measures for prevention of coal and gas outburst disaster. 展开更多
关键词 Coal-Gas Outburst Grey theory Fixed Weight Clustering Analysis Regional Outburst Prevention Measures
下载PDF
Consumptive ecological footprint and productive ecological footprint: a modification on ecological footprint theory to evaluate regional sustainable development 被引量:1
19
作者 XIONGDeguo XIANXuefu 《Journal of Chongqing University》 CAS 2004年第1期51-54,共4页
Ecological footprint theory and its application achievements in global and regional sustainable development systems are studied by consulting the published literature, which finds that the application of ecological fo... Ecological footprint theory and its application achievements in global and regional sustainable development systems are studied by consulting the published literature, which finds that the application of ecological footprint theory to regional sustainability evaluation has leaded to a perplexity that the indicated result was inconsistent with the philosophy of sustainable development theory. Illuminated by the mechanical system of the movement of matters, it comes up that ecological footprint based on consumption of biologic production could not tell whether the ecological pressure acts on the specified region, and the original ecological footprint theory also undervalued the development impartiality of a region. A modification on this theory is made by introducing consumptive ecological footprint and productive ecological footprint, in which the latter is taken as the indicator of regional sustainability. The development impartiality can be demonstrated by comparison between the global ecological deficit per capita and regional consumptive ecological deficit per capita. 展开更多
关键词 ecological footprint theory regional development sustainability productive ecological footprint consumptive ecological footprint impartial evaluation of development
下载PDF
Regional differences in gully network connectivity based on graph theory:a case study on the Loess Plateau,China
20
作者 CHENG Jian-hua LUO Lan-hua +2 位作者 LI Fa-yuan LIU Lu-lu CUI Ling-zhou 《Journal of Mountain Science》 SCIE CSCD 2023年第4期1035-1050,共16页
Material exchange frequently occurs in gullies,and thus the relationship between a gullynetwork structure and sediment transport potential has attracted considerable interest.However,previous researches ignored the di... Material exchange frequently occurs in gullies,and thus the relationship between a gullynetwork structure and sediment transport potential has attracted considerable interest.However,previous researches ignored the difficulty of material transport from sources to sinks,and did not quantify the connectivity of a network structure.In this study,we used a graph model structure to model gully networks of six typical sample areas in the Loess Plateau of China and quantified gully network connectivity using four indexes:average node strength,accessibility from sources to sinks,potential flow,and network structural connectivity index.Results show that:(1)Reflected by different quantitative indexes,the trends of gully network connectivity in different regions are similar.From north to south,the connectivity of a sample area first increases and then decreases.(2)The more mature gullies have stronger network connectivity.Small resistance is conducive to material transport in the gullies.(3)The node connectivity index of the gully network shows a significant aggregation distribution in space,and node connectivity on the main channel is often stronger than that on the branch trench.These results not only deepen the understanding of the process and mechanism of loess gully geomorphic development and evolution but also provide a reference for geomorphic studies. 展开更多
关键词 Graph theory Gully network Loess Plateau CONNECTIVITY Regional difference
下载PDF
上一页 1 2 97 下一页 到第
使用帮助 返回顶部