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Research on Investment Efficiency of Chinese Listed Coal Companies Based on dea model

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Research on Investment Efficiency of Chinese Listed Coal Com...

作者： Zhilin JI Jiangsu Vocational Institute of Commerce

Based on dea（Data Envelopment Analysis） method,this paper introduces the idea of dynamic planning,and analyzes the operating efficiency of 10 coal companies listed in China from 2014 to *** empirical analysis results show that:under the influence of Chinese government’s de stocking policy,The operating efficiency of listed coal companies in China is generally high,especially,China Shenhua Energy Company lined and Yanzhou Coal Mining Company *** the past five years,the efficiency has been on the rise,but smaller companies are still facing the problem of improving the operating *** the influence of the de stocking policy,the operating efficiency of coal companies in 2016 and 2017 has been improved as a whole To improve the efficiency of coal enterprises in China,the countermeasures and suggestions are put forward.

关键词： dea model Coal listed company operating efficiency Input & output analysis

Study on Service Outsourcing Efficiency of Chinese Central Cities Based on dea model

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Study on Service Outsourcing Efficiency of Chinese Central C...

战略与管理工程：企业、环境与危机——2009战略管理国际会议

作者： ZHOU Qihong WANG Yang LIN Li School of Foreign Economics and Trade Wuhan University of Science and Engineering

In China,there are 7 cities labelled models in outsourcing *** and Wuhan are among these *** paper applies dea model to an empirical analysis,which shows that the efficiency of these model cities in outsourcing service varies *** with the same efficiency,these cities have different development potential and *** suggests a way of efficiency evaluation to explore their own strengths and continually improve the effectiveness of undertaking service outsourcing to achieve the best input and output ratio,enhance economic vitality and maintain a sustainable,coordinated and rapid development.

关键词： Service Outsourcing dea model Efficiency Evaluation

Study of Efficiency of Agricultural Listed Companies Based on dea model

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Asian Agricultural Research 2018年第6期10卷 8-13页

作者： Maozhang HOU Lingying LI Bangor College Central South University of Forestry and Technology Changsha 410004 China Hunan Provincial Engineering Laboratory of Risk Management and Control Techniques for Innovative Enterprises Changsha 410004 China College of Economics Central South University of Forestry and Technology Changsha 410004 China

As leading enterprises supporting the agricultural development,agricultural listed companies play a great role,thus the study on their operating efficiency will have a strong demonstration effect. Using the data envelopment analysis( dea) model,the operating efficiency of 20 agricultural listed companies was compared and analyzed. The results indicated that the overall efficiency of the agricultural listed companies is low. In agricultural listed companies with low or moderate overall efficiency,some agricultural companies are affected by the pure technical efficiency or scale efficiency,while other companies are affected by both factors,and accompanied with the increasing or decreasing efficiency along with the scale. Through in-depth analysis,it concluded that nine companies affected by pure technical efficiency have different degree of input redundancy or output deficiency. On this basis,it came up with pertinent recommendations for improvement.

关键词： dea model Agricultural listed companies Operating efficiency

The efficiencies and their changes of China＇s resources-based cities employing dea and Malmquist Index models

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Journal of Geographical Sciences 2012年第3期22卷 509-520页

作者： Sun Wei Li Yang Wang Dai Fan Jie Chinese Acad Sci Inst Geog Sci & Nat Resources Res Beijing 100101 Peoples R China Chinese Acad Sci Key Lab Reg Sustainable Dev Modeling Beijing 100101 Peoples R China Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China

Employing dea model and Malmquist productivity index, this paper probes into the urban efficiencies of 24 typical resources-based cities in China and their changes from 2000 to 2008. The research finds that the overall efficiencies of the resources-based cities are just at a general level, and only a few of them reach the optimal level. The scale efficiency is the major determining factor of the achievement of overall efficiency, the effect of which, nevertheless, is reducing. From the perspective of classification characteristics, the resources-based cities in northeastern region have been in the front rank in terms of overall efficiency, pure technical efficiency and scale efficiency. There is a certain positive correlation between urban population scale and urban efficiency. The analysis of urban efficiency changes shows that the changes in overall efficiency of resources-based cities from 2000 to 2008 had a weak improving tendency. Both the technical change index and productivity change index decreased, indicating that the urban efficiency did not improve during this period, and the tendency of technical recession and productivity decline was obvious. In terms of the classification of urban efficiency changes, the urban overall efficiency improved in each of the four regions from 2000 to 2008, among which western region witnessed the greatest increase. Cities with different resource types have improved their urban overall efficiencies except steel-based cities. The urban overall efficiency increased in resources-based cities of different scales, with greater improvement in small and medium-sized cities than in big cities.

关键词： resources-based cities dea model Malmquist productivity index efficiency

A data envelopment analysis of agricultural technical efficiency of Northwest Arid Areas in China

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Frontiers of Agricultural Science and Engineering 2017年第2期4卷 195-207页

作者： Yubao WANG Lijie SHI Haojie ZHANG Shikun SUN Key Laboratory of Agricultural Soil and Water Engineering in Arid Area Ministry of Education/Northwest A&F University Institute of Water Saving Agriculture in Arid Regions of China Northwest A&F University Institute of Soil and Water Conservation Chinese Academy of Sciences & Ministry of Water Resources

Severe resource shortage and waste of resource in agricultural production make it necessary to assess efficiency to increase productivity with high efficiency and ensure sustainable agricultural development. This paper adopted an input-oriented data envelopment analysis(dea) method with the assumption of variable returns to scale to evaluate agricultural production efficiency of 100 major irrigation districts in Northwest China in *** findings of this paper were as follows: firstly, the average value of total technical efficiency, pure technical efficiency and scale efficiency of those irrigation districts in Northwest China were 0.770, 0.825 and 0.931,respectively; secondly, 30% of irrigation districts were technically efficient, while 42% and 32% of them showed pure technical and scale efficiency respectively. Among inefficient decision-making units, total technical efficiency score varied from 0.313 to 0.966, showing significant geographical differences, but geographical differences of pure technical efficiency was more consistent with that of total technical efficiency; thirdly, input redundancy was evident. Inputs of agricultural population, irrigation area,green water, blue water, consumption of fertilizer and agricultural machinery could be reduced by 34.88%,40.19%, 43.85%, 47.10%, 41.53% and 42.21% respectively without reducing agricultural outputs. Furthermore,irrigation area, green water and blue water had relatively high slack movement though Northwest China which is short of water resources. Based on these results, this paper drew the following conclusions: First, there is huge potential for Northwest China to improve its agricultural production efficiency, and agro-technology not input scale had greater influence on improvement. Second, farmers needed proper guidance in order to reduce agricultural inputs and it is time to centralize agricultural management for overall agricultural inputs regulation and control.

关键词： agricultural production efficiency dea model input redundancy irrigation districts Northwest Arid Areas in China

Research on Financial Supply Efficiency of Listed Companies in Emerging Industries in Jiangsu Province

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Research on Financial Supply Efficiency of Listed Companies ...

作者： Song Jiayang Zhang Yuan School of Economics and Management Nanjing University of Science and Technology

Emerging industries represent the direction of a new round of scientific and technological revolution and industrial transformation. They are the key areas to cultivate new driving forces for development and obtain future competitive advantages. They are new economic sectors or industries with the birth of scientific research achievements and technologies. During the 13 th Five Year Plan period, we should put these industries in a more prominent position in economic and social development, vigorously build a new system of modern industries, and promote sustainable and healthy economic and social development. Because of the characteristics of these industries, they cannot do without a large number of stable capital investment and financial support. High efficiency of financial supply means "delivering carbon in the snow" for these industries. Based on the data of 37 emerging industry listed companies in Jiangsu Province from 2013 to 2017, this paper uses the BCC model of generalized dea to analyze the financial supply efficiency of emerging industry listed companies in Jiangsu Province, and finds that: the overall efficiency value of emerging industry in Jiangsu Province is not optimal, but shows an upward trend;the financial supply efficiency is between different industries and enterprises There are differences.

关键词： Financial supply efficiency emerging industry dea model

Appropriate Scale of Breeding Cows in Family Operation of Yanbian Cattle

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Animal Husbandry and Feed Science 2017年第6期9卷 349-351页

作者： Bai Xiangpo Shen Pengfei Wang Xuyou Agricultural College of Yanbian University Helong Housing and Urban-rural Development Bureau

Family operation of breeding cow is the only way to realize modernization of animal husbandry. Through field survey of Yanbian cattle farmers, the main input indicators were analyzed, including number of breeding cows, number of breeding bulls, input of cattle house, feed cost, production equipment investment, and grazing rent. The slaughter number of store cattle per year was selected as the output index. The efficiency of family operation scale of Yanbian cattle was analyzed using BCC model of dea. The results showed that the moderate scale of breeding cows in family operation with half grazing and half housing pattern was around 50 -60 cattle.

关键词： Breeding cow Family operation Moderate scale dea model

R＆D on Laser Scanning Manufacturing Control System

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R＆D on Laser Scanning Manufacturing Control System

第二十六届中国控制会议

作者： Zhao Fangfang1,2,Sun Huilai1,Lin Shuzhong1,Qi Xiangyang1 1.School of Mechanical & Electronic Engineering,Tianjin Polytechnic University,Tianjin 300160,P.R.China2.Department of Industrial Engineering,School of Management,Tianjin University,Tianjin 300072,P.R China

The paper presented the actions and data communication among the components of *** was nonlinearity mapping between output coordinates and scanner sphere coordinate and scanner driver in *** it brings about nonlin-earity errors of manufacturing geometry *** control system was founded based on analysis of LSM technological *** control system concerns the distance of the two swaying mirrors,the distance between the swaying mirror and convex lens,the mirror swaying angle,the lens focal length,the lens central height,the lens convex radius and the medium refractive *** improved the precision and reduced the errors in LSM *** design ideology was adopted in the control system of LSM *** reduced the difficulties of programming,shortened the design recycle while enhancing the stability of control system and the speed of manufacturing *** Complexity of software was predi-gested,program structure was perspicuity and easily comprehended,link-port was simply.

关键词： LSM Geometry Algorithm Control Mode dea model

我国沿海地区酒店产业效率时空差异及其影响因素研究

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