The Impact of Liberalization on the Production of Electricity in Japan: Stochastic Frontier Analysis

This study aims to measure the impact of liberalization on the efficiency of electricity production in Japan using Stochastic Frontier Analysis (SFA). In addition, this study also aims to examine whether or not economies of scale exist in the electricity generation sector and the transmission sector, and whether or not economies of scope exist between electricity generation and transmission. Since 1995, liberalization of the electricity market in Japan has been phased in and regulations on entry have been relaxed three times. One motivation for these regularity changes has been to improve the efficiency of electricity production by introducing competition. Using a panel data set on the nine main power companies in Japan over the period 1970-2010, estimates of fixed-effects and stochastic frontier models of the cost function are obtained and compared. Estimates of the cost function show that liberalization has improved cost efficiency when both frontier models and non-frontier models are estimated. Estimates of the fixed-effects model are used to calculate economies of scale and economies scope because the data support the fixed-effects model. Economies of scope are found to exist for all nine power companies, while overall economies of scope declined in the 1970s and have improved little by little since the 1980s.

Research Characteristics of Thermal Comfort of Urban Block Landscape Based on Knowledge Graph Analysis

The landscape environment of urban blocks plays a significant role in improving the comfort of urban thermal environment and promoting green and high-quality development.The 342 papers related to the research on the impact of urban block landscape environment on thermal comfort in China,collected by CNKI(China National Knowledge Infrastructure)from 2002 to 2022,are used as the research object.Through bibliometric statistical analysis,LLR algorithm,and cluster analysis,the current research status of the impact of urban block landscape environment on thermal comfort in China is analyzed and processed,and its external characteristics are identified.Using the information visualization software CiteSpace,the research topics in the field of the impact of urban block landscape environment on thermal comfort are presented in the form of knowledge graphs.Through co-occurrence analysis of keywords and trend of word frequency changes,the development trends of research hotspots and cutting-edge fields of the impact of urban block landscape environment on thermal comfort are determined,hoping to provide reference for future research in this field.

Frontier Analysis of Nepalese Commercial Banks： DEA Approach

The efficiency of any organizations at manufacturing sector or service sector, profit making or non-profit making, is most important factor for survival and growth of the organization. The Data Envelopment Analysis （DEA） technique is one of the most popular and effective tool to measure relative efficiency hence is appropriate to make comparison among similar organizations with multiple output and input. This study performs frontier analysis and measures the relative efficiency of Nepalese commercial banks using DEA approach with two output and two input variables.

A comparative analysis of multi-output frontier models

Recently, there have been more debates on the methods of measuring efficiency. The main objective of this paper is to make a sensitivity analysis for different frontier models and compare the results obtained from the different methods of estimating multi-output frontier for a specific application. The methods include stochastic distance function frontier, stochastic ray frontier, and data envelopment analysis. The stochastic frontier regressions with and without the inefficiency effects model are also com-pared and tested. The results indicate that there are significant correlations between the results obtained from the alternative estimation methods.

AN ANALYSIS OF ANTONINUS PIUS’ FRONTIER POLICY IN NORTHERN BRITAIN AND ITS REPRESENTATION OF HIS PRINCIPATE

The accession of Antoninus Pius saw a distinct change in imperial frontier policy in Britain. Upon taking power, Antoninus’ representative in Britain, Q. Lollius Urbicus,1 undertook the systematic re-occupation of lowland Scotland and a new

Situation Analysis of Developing ReBAM in Yanji City

The ratification and implementation of Cooperation and Development Planning Outline of Tumen River Region in China will have great significance to the frontier opening-up in the Northeast Asia Region of China, economic cooperation in sub-region of Tumen River, and the development of tourism in forerunner zone of "Changchun-Jilin-Tumen". Yanji City is regarded as the fulcrum Chinese city in "Golden Triangle" of Northeast Asian economic zone, whose breakthrough and development in tourism and recreation is in face of new situation. Based on analyzing strength, weakness, opportunity and threat of development of ReBAM in Yanji City, our research further deepens the systematic understanding of development of ReBAM in Yanji City. And we get the conclusion that Yanji city should take the opportunity of cooperation and development of Tumen River Region in China on the basis of newly fledged ReBAM at present, to exploit the potential of market demand for ReBAM, and implement proactive growth-oriented strategy to further improve urban tourism structural system in Yanji City.

Visualization analysis of the study of fund-sponsored clinical nursing papers

Objective： The aims of this study were to understand the status quo of authors, collaborations between institutions, research hotspots, and research frontiers of fund-sponsored clinical nursing papers and to provide a reference for Chinese scholars to conduct clinical nursing studies in the future.Methods： The visualization software CiteSpace was used to analyze fund-sponsored clinical nursing papers published between 2012 and 2016 in 12 core journals of nursing.Results： In the clinical nursing field, there are many co叩erative author groups; however, the collaborations between institu加 not close and exist mainly within the same province or city. High-frequency keywords have revealed the four clinical nursing research hotspots of population, diseases, nursing intervention, and others. Chinese medicine nursing, prevention, treatment and nursing, and new technology-aided nursing of ventilator-associated pneumonia are the study frontiers of clinical nursing.Conclusions： Clinical nursing studies are rich in content and cover a wide range of areas, and their hotspots and frontiers are closely related to the requirements of clinical nursing. Collaborations across regions, provinces, and cities are not adequate; there is an urgent need to strengthen the cross-regional exchanges and collaborations to promote the further development of clinical nursing.

Dynamic Visualization Analysis of China's Urban Greenway Research Based on CiteSpace

Greenway is an organic part of urban ecological network system,and its construction is closely related to urban ecological civilization.Urban greenway not only provides elastic space for high-density cities,but also promotes the construction of low-carbon and resilient cities,thus constantly creating ideal living environment.Through visualization analysis of 1,315 literatures on China's urban greenway included in CNKI from 1986 to the first half of 2022,the paper analyzed the published papers,research strength,research hotspots and frontier trend of China's urban greenway research based on CiteSpace,in order to provide a reference for future research of urban greenway in China.

Visual analysis of shared medical appointments based on CiteSpace

Objective:Analyze the research hotspots and frontiers of shared outpatient service,and provide a reference for researchers in this field to carry out follow-up research.Methods:Search the Web of Science core collection database until 2022 and visually analyzekeywords in this field through CiteSpace5.8.R3 software,Results:A total of 261 iteratures were included.The research focuses mainly on advanced care planning,diabetes care,andgroup prenatal care,The research trend tends to be telemedicine and nursing provided by specialized nurses.Conclusion:Scholars can learn from the research hotspots of foreign shared medical appointments,pay attention to the research trend,expand its application scope in combination with China's national conditions,and further promote thedevelopment of shared medical appointments in China.

基于Factored Frontier算法的动态贝叶斯网络灵敏性分析方法

贝叶斯网络的灵敏性分析是研究模型局部参数或证据微小变化对于目标结点所产生的影响,以发现复杂系统的重要参数和结构.然而对于动态贝叶斯网络,当前还没有一种有效的灵敏性分析算法.针对隐马尔科夫模型(HMM)灵敏性分方法不能用于分析动态贝叶斯网络灵敏性和灵敏性分析计算复杂性高的问题,提出一种可有效处理动态贝叶斯网络灵敏性分析算法(SA_FF).SA_FF算法利用FF近似推理算法(Factored Frontier)思想求解动态贝叶斯网络的灵敏性函数,通过对马尔可夫毯所构成边界(Frontier)的动态推理建立参数与目标结点条件概率分布之间的函数关系;SA_FF算法在灵敏性函数推理计算过程中,通过对局部性边界的边缘化进行信息传播,不需要对模型的联合概率分布进行更新,显著提高了计算的效率,且可用于多参数灵敏性分析,但会引入一定的误差;进而,通过误差分析证明所引入的误差是有界的.最后,通过实例计算的比较和分析显示SA_FF算法的有效性.

干细胞治疗阿尔茨海默病的研究热点与前沿

背景:干细胞具有促进神经再生、修复受损神经、抑制炎症反应和神经细胞凋亡的作用,为阿尔茨海默病治疗提供了一种全新的途径。目的:对2004-2023年国际发表的干细胞治疗阿尔茨海默病的文献进行文献计量学分析,揭示干细胞治疗阿尔茨海默病的研究热点和趋势。方法:以Web of Science核心合集数据库为来源,利用Excel、VOSviewer、Citespace软件对2004-01-01/2023-10-31发表的与干细胞和阿尔茨海默病相关的文献进行年发文量、国家、机构、期刊/共被引期刊、作者和关键词等的可视化分析。结果与结论:共纳入核心文献3521篇,年发文量逐年攀升;美国是发文最多的国家,哈佛医学院是最高产的机构,Maiese kenneth是发文量最多的作者,《International Journal of Molecular Sciences》在该领域发文量最多,《PLoS One》发表的文献被引次数最多;目前干细胞治疗阿尔茨海默病领域以病理生理机制和动物实验研究为侧重点,“神经发生”“氧化应激”“细胞外囊泡”“间充质干细胞”是该领域研究的趋势热点。干细胞治疗阿尔茨海默病具有广阔的前景,未来应加强机构和作者间的交流合作,深入探索干细胞治疗阿尔茨海默病的主要机制,解决临床可能遇到的免疫排斥、有效性及安全性等问题,进一步挖掘干细胞在阿尔茨海默病治疗中的潜力。

Full ranking procedure based on best and worst frontiers

In the traditional data envelopment analysis （DEA） structure, the efficiency score for one decision making unit （DMU） is calculated by measuring the distance of the evaluated DMU to the best practice frontier. Recent researches have provided the reasonability of considering the worst practice frontier as a supple- ment to the traditional DEA techniques. The existing researches take only one type of frontier into account, and they cannot com- pare the evaluated DMU with both the best and the worst perform- ing DMUs. A DEA-based procedure is developed to consider the best and the worst frontiers in the same scenario where the ratio of two distances （RDS） measure is proposed. The principal appli- cation of this approach is for ranking, and, as a complement tool, for performance evaluation. The proposed approach can be used in a wide range of applications such as the performance evaluation of employees and others. Finally, a bookstore data set is used to illustrate the proposed approach.

Technical efficiency of hybrid maize growers: A stochastic frontier model approach

This study investigated the effect of credit constraints and credit unconstraints on the technical efficiency of hybrid maize growers in the Khyber Pakhtunkhwa Province(KPK) of Pakistan. The primary data were collected by a direct elicitation method from 510 maize growers of KPK Province. Stochastic frontier model techniques were used for technical efficiency analyses. The results revealed that the mean technical efficiency difference between the two groups was 10.2%. The results of technical inefficiency effect modeling demonstrated that education of the household head, family size, number of married family members, off-farm income, farming experience, tractor drill, water irrigation through a lined course, certified seed, extension services, household saving variables, and a credit size variable had positive effects on technical efficiency for both credit constrained farmers(CCFs) and credit unconstrained farmers(UCCFs). In addition, age of household head and fragmented land values had negative effects on technical efficiency for both groups. However, the interest rate had positive and negative impacts on the technical efficiency of CCFs and UCCFs, respectively. Our results have significant implications for policies related to land use, interest rate, and banking sector expansion in the rural areas of Pakistan.

Primary Educational Productivity ： A Study Based on Stochastic Frontier Educational Production Function Model

This paper builds a stochastic frontier educational production function model, estimating the primary educational productivity with annual data of 31 provinces from 2007 to 2011. The conclusions are as follows： （1） in educational production function, output elasticity of public educational expenditure exceeds private educational expenditure＇s. The degrees of contribution of public and private educational expenditure reflect that China should increase public educational expenditure. （2） regional educational technical efficiency is affected by both structure of educational expenditure and levels of regional economic growth. Primary educational technical efficiency of east, middle and west regions all tended to fall down during 2007 to 2011.

国内外完全植入式输液港研究可视化对比分析

目的 分析近20年国内外输液港研究的发展现状、发展热点与前沿,为相关研究提供参考。方法 使用CiteSpace 6.3对Web of Science核心数据库,知网、万方、维普等中文数据库2002年1月至2022年12月收录的输液港相关文献进行分析。结果 最终纳入中文文献1310篇、英文文献687篇。中英文研究热点相近,其中护理教育、无损伤针是中文特有的研究热点,聚维酮碘是英文特有的研究热点;疼痛为中文文献的研究前沿,输液港植入方式、位置、风险因素筛查、患者结局、生活质量为英文文献的研究前沿。结论 国内外输液港研究整体呈上升趋势,我国输液港临床实践发展迅速。国内外输液港研究水平相近,利用多种机会分享中国经验、合力拓展输液港研究广度将是护理人员未来需思考的重点。

生猪产业低碳发展的研究进展与展望

为探究生猪产业低碳发展研究动态和发展趋势,本文基于web of science(WOS)核心数据库,运用CiteSpace文献计量软件对该研究领域进行了全面的梳理,从多个角度分析生猪产业低碳发展现状,并揭示该领域研究热点的演变以及未来发展趋势。结果:低碳养猪研究的发展依次经历了3个时期和4个产业发展阶段,其中气体控制与资源高效利用两个主题在研究的各时期均表现出较高热度;核心作者和机构合作网络已初步形成,李荣华、Awasthi、Lehmann、Sommer等是该领域研究较有影响力的学者,中国和美国是该领域发文最多的国家;研究确定了87个关键词、4个研究热点和5个研究领域,并绘制了生猪产业低碳发展研究知识路线图。未来研究将继续注重技术创新、加强跨学科间的合作,并在此基础上,进一步应用跨学科方法开展生猪生产效率与动物福利、养殖主体低碳行为决策等前沿研究。同时,政府的引导能够让生猪产业降碳减排潜力得到更好地量化。

基于双前沿面数据包络分析的云制造服务功能匹配

针对云制造环境下功能匹配过程中属性权重需提前确定,进而影响匹配精度的问题,提出了一种基于本体相似度的双前沿面数据包络分析(DEA)匹配方法,该方法根据总体几何平均相似度进行服务排序,并自动生成属性权重。首先,为了提高匹配效率,从基本信息、类型、状态及功能四方面对云制造服务与需求进行描述;然后,引入信息量并改进相似度计算方法,提出基于概念语义距离、信息量和概念层次顺序的本体概念综合语义相似度计算方法;在此基础上,运用双前沿面DEA模型衡量总体效率,以此进行服务排序;最后通过算例证明了该方法的可行性。所提方法为改善云制造服务功能匹配效果提供了参考。

基于CiteSpace分析的国内海洋牧场研究进展

为了探究国内海洋牧场的研究情况,以中国知网收录的文献为研究对象,利用CiteSpace软件分析国内海洋牧场研究的发文趋势、主要研究机构、研究领域、研究层次和主要学者等特征,从关键词共现分析、关键词聚类分析、关键词时间线分析和研究前沿分析等方面展示国内海洋牧场研究的热点和前沿进展。研究结果表明,近10年是海洋牧场蓬勃发展的时期,研究文献总体上呈现逐年增长的趋势;海洋牧场的主要研究机构均位于沿海地区;海洋牧场的研究主要涉及水产和渔业、农业经济、海洋学3大领域;海洋牧场的研究层次主要集中在开发研究-行业研究、技术研究和应用基础研究等;主要聚类词语有海洋牧场、山东省、休闲渔业、农业部、渔政执法、群落结构、烟台市和獐子岛等,海洋牧场研究的主题主要是海洋牧场、人工鱼礁、增殖放流和休闲渔业;海洋牧场研究主题目前趋于稳定,最近几年的研究前沿主要分布在海洋渔业、养殖模式等方面;研究热点主要集中于海洋牧场智能化和现代化、人工鱼礁、渔业资源、增值放流及休闲渔业等方面。

学科交叉研究的现状、热点与趋势展望——基于CNKI数据库的CiteSpace可视化分析

推进学科交叉建设已成为世界一流大学的共识。运用CiteSpace软件对国内学科交叉研究的现状、热点与趋势进行可视化分析,形象、客观地展现出该领域的研究概貌,以期为未来学科交叉研究提供研究突破点和创新点。国内学科交叉研究内容受时事热点和政策导向影响,各研究机构、各作者之间的合作结构非常松散,未来学科交叉研究热点将朝着生成机理、数字赋能、评价体系等更加科学化、架构化的内容迈进,政策引导和支持、宏观的研究视野与多元化研究方法成为必要支持条件。

基于CiteSpace文献计量的健康消费研究热点与其演进的可视化分析

随着人们对健康重视程度的提高和消费对经济拉动作用的日益显著,健康消费的研究已经成为国内和国际研究的重点。文章利用CiteSpace软件的可视化功能对中外期刊进行对比分析,研究结果表明,从发文数量来看,国内健康消费方面研究力量有所增强;从发文机构来看,国内机构间合作有很强的地缘性,发文机构多位于经济发达地区;从研究热点来看,国内更偏重于消费方面的研究国际更偏重于健康方面的研究,健康与消费的结合并未成为热点;从研究趋势来看,国内研究呈现出明显的政策导向型的趋势和特点,未来仍然关注于与经济发展相关的健康消费研究,国际研究未来仍然会侧重于健康方面的研究,并未出现健康和消费相结合的趋势。