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1.
同样的数据,经典的输入型DEA模型和输出型DEA模型可能得到不一致的相对有效值。提出了一种新的兼顾输入和输出的非径向型BCC线性规划模型,研究它的相对有效性.并以上市公司为例,将此模型与现有经典模型进行分析比较. 相似文献
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龚曲华 《廊坊师范学院学报(自然科学版)》2014,14(5)
将Hadamard乘积算子引入到传统的CCR模型中,定义一种新的DEA线性规划模型,并给出它的对偶规划.该模型避免了非阿基米德无穷小CCR模型的参数依赖问题,同时也避免了两阶段方法的双规划计算量问题.根据该模型的任一个最优解,可容易判断决策单元的CCR相对有效性,也较容易根据各相对有效值测度计算各决策单元的相对有效值,同时可判断决策单元的相对有效性. 相似文献
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《陕西教育学院学报》2017,(3)
基于可信性理论,本文给出了不允许缺货的经济生产量(EPQ)问题的期望值模型;研究了当单位生产准备费、单位储存费均为模糊变量且相互独立的情况下EPQ问题的最佳期望单位存储费用、最佳期望单位生产批量及最佳期望生产周期,并得出了一些重要的结论;特殊情况下,讨论了当模型中的模糊参数分别为三角模糊变量、梯形模糊变量及正态模糊变量情况下的EPQ问题的最优存储策略;最后,针对上述三种情况本文分别给出了一些数值例子验证了模型的有效性和合理性;本文所得到的结果为求解EPQ问题设计算法提供了理论依据. 相似文献
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多因素时间序列预测是时间序列数据挖掘的一个重要分支,被广泛地应用于各种领域.文中利用灰色关联分析(GRA)和主成分分析(PCA)对RBF网络的输入空间进行降维重构,选取与输出变量关联度相对大的影响因素,并消除各因素之间相关性,解决了RBF网络在多因素时间序列预测模型设计中的影响因素约简问题.通过粮食产量实例仿真,验证了模型的有效性. 相似文献
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竞玉贞 《赤峰学院学报(自然科学版)》2012,(2):4-6
为了更加全面的评价中部地区的技术创新的有效性,以中部地区九省的大中型企业为研究对象,应用DEA模型从投入与产出角度从相对有效、规模有效和技术有效上来分析2009年中部地区技术创新的有效性,进而对非DEA有效省份做出改进． 相似文献
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提出了基于理想情况下以期望输出为设计起点的消色差偏振旋转器的设计思路,并构建了消色差偏振旋转器的优化设计模型,提出了基于遗传算法的宽带偏振旋转器的全局优化设计方法. 相似文献
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在Buck DC/DC变换器的分析与设计中,对开关工作时所形成的电压纹波的分析是至关重要的.为分析其输出电压纹波特性,讨论了Buck DC/DC变换器工作模式,以此为基础,建立了Buck DC/DC变换器的PSpice仿真模型,对工作在非连续电流模式(DCM)下的影响Buck变换器的输出电压纹波的有关因素进行了参数扫描分析.结果表明,输出电容对电压纹波影响较大,输入电压、负载、开关频率等的变化对电压纹波影响相对较小.该结论为Buck DC/DC变换器的设计和实现提供了一定的理论基础. 相似文献
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随着广义虚拟经济的发展,商品或服务的虚拟价值越来越受到重视,基于广义虚拟经济视角重新考量期望产出和非期望产出的问题非常迫切.本文考察了期望产出正的经济外部性和非期望产出负的经济外部性,通过构建一般要素投入、期望产出和非期望产出前沿面的模拟曲线图,从广义虚拟经济的视角出发考虑虚拟价值,研究该因素的介入对期望产出与非期望产出前沿面的影响.认为商品或服务的虚拟价值因素的考量提高了期望产出水平,降低了非期望产出水平,因此企业应重视虚拟价值的挖掘,实现期望产出最大化和非期望产出最小化. 相似文献
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Data envelopment analysis (DEA) has become a standard non-parametric approach to productivity analysis, especially to relative efficiency analysis of decision making units (DMUs). Extended to the prediction field, it can solve the prediction problem with multiple inputs and outputs which can not be solved easily by the regression analysis method. But the traditional DEA models can not solve the problem with undesirable outputs,so in this paper the inherent relationship between goal programming and the DEA method based on the relationship between multiple goal programming and goal programming is explored, and a mixed DEA model which can make all factors of inputs and undesirable outputs decrease in different proportions is built. And at the same time,all the factors of desirable outputs increase in different proportions. 相似文献
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Data envelopment analysis (DEA) has become a standard non-parametric approach to productivity analysis, especially to relative efficiency analysis of decision making units (DMUs). Extended to the prediction field, it can solve the prediction problem with multiple inputs and outputs which can not be solved easily by the regression analysis method.But the traditional DEA models can not solve the problem with undesirable outputs,so in this paper the inherent relationship between goal programming and the DEA method based on the relationship between multiple goal programming and goal programming is explored,and a mixed DEA model which can make all factors of inputs and undesirable outputs decrease in different proportions is built.And at the same time,all the factors of desirable outputs increase in different proportions. 相似文献
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The present study assesses the performance of 54 participating countries in PISA 2006. It employs efficiency indicators that
relate result variables with resource variables used in the production of educational services. Desirable outputs of educational
achievement and undesirable outputs of educational inequality are considered jointly as result variables. A construct that
captures the quality and quantity of educational resources consumed is used as resource variables. Similarly, environmental
variables of each educational system are included in the efficiency evaluation model; while these resources are not controllable
by the managers of the education systems, they do affect outcomes. We find that European countries are characterized by weak
management, the Americans (mainly Latin Americans) by a weak endowment of resources, and the Asians by a high level of heterogeneity.
In particular, Asia combines countries with optimal systems (South Korea and Macao-China); countries with managerial problems
(Hong Kong, China-Taipei, Japan and Israel); others where the main challenge is the weak endowment of resources (Jordan and
Kyrgyzstan), and, finally, others where the main problem is in the long run since it concerns structural conditions of a socioeconomic
and cultural nature (Turkey, Thailand, and Indonesia). 相似文献
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特木钦 《内蒙古大学学报(人文社会科学版)》2014,(5):66-69
对于具有多个阶段的生产过程,某个阶段中的一些产出可能为污染品,并且可以通过一定的技术转化为正常品。基于网络包络分析理论,以多阶段生产过程为研究对象,考虑污染品不经过处理情形下的最优预算和无排污权转让的技术定价问题。 相似文献
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Dr. Jane Louise Johnson 《Research in higher education》1978,9(2):169-179
Increasing concern with productivity and efficiency in service industries such as higher education has created interest in cost analysis techniques, implicit in which must be some notion of the production function, that is, the technology by which inputs are combined to produce outputs. In order to clarify the existing confusion in higher education between inputs and outputs, and to offer aid in understanding the complex issues of productivity and efficiency, this paper offers a paradigm of the student as an economic entity analogous to the profit-maximizing firm in microeconomic theory. The paper concludes by suggesting an extension of the model to include the faculty member as an individual economic agent. 相似文献
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高校成本结构与产出效率的关系研究 总被引：1，自引：0，他引：1
通过定量分析方法对高等学校的成本结构与科研产出总量和科研产出效率之间的关系进行分析,结果显示,在生均事业费支出和教学产出总量一定的情况下,随着科研支出比例的增加,反映高等学校科研产出总量和效率的高等学校的SCI总数和教师人均SCI也在增加,从而使总产出得到增加。这一实证结果表明,在资源总量一定的情况下,高等学校经费在不同领域之间的配置结构对产出和效率具有显著的影响。 相似文献
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利用DEA模型,对安徽、江苏、浙江、上海4省市2005-2007年3年旅游业投资效率进行比较研究,结果表明:上海市连续3年DEA有效,且不存在投入冗余和产出不足,其余3省虽然不同年份存在非DEA有效,但总体效率还是较高的.4省市作为"泛长三角"区域性旅游业整体,要提高区域旅游业的效率,需提升旅游业管理水平、精简从业人员... 相似文献
18.
Among the studies of the internal efficiency in higher education, most have focused on the scale of university (the economies of scale), but little on internal operating efficiency in higher education, especially on the combined efficiency of outputs (the economies of scope). There are few theoretical discussions or experimental research on whether teaching resources are complementary with research resources, or whether resources in undergraduate cultivation are shared with those in postgraduate training. In the background of the resource scarcity, it is significant to study the economies of scope in higher education to realize intensive development of higher education. Based on the multiproduct cost function and the data of universities attached to the Ministry of Education, this paper attempts to deal with the complementarities of resources used in undergraduate cultivation, postgraduate training and research to find that universities produce these outputs without sufficient resource sharing, the diseconomies of scope in postgraduate training is highest. As far as the quality of teaching and research are concerned, diseconomies of scope of the outputs are great. The main reasons are as follows: poor distribution of facilities, teachers and books, overlapping internal management systems, and the current postgraduate cultivation model. Therefore, relative departments should take internal resource sharing in higher education into account when making the administration policy of higher education. 相似文献
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Efficiency differences of finnish senior secondary schools: An application of DEA and Tobit analysis 总被引：1，自引：0，他引：1
We studied efficiency differences among Finnish senior secondary schools by Data Envelopment Analysis (DEA). Four model variants were used. Average efficiencies in the most extensive models were 82–84 per cent. When parents' educational level was treated as an additional input, average efficiency increased to 91 per cent. The efficiency rankings of schools changed to some extent when simplest quantitative inputs and outputs were augmented by measures of teacher quality and national matriculation examination results. As a second stage after DEA analysis, we explained the degree of inefficiency (100-efficiency score) by a statistical Tobit model. Schools with small classes and heterogenous student bodies were inefficient whereas school size did not affect efficiency. Surprisingly, private schools were inefficient relative to public schools. When parents' educational level was only included in the Tobit model, it affected efficiency positively. 相似文献
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DEA模型在高等学校内部院系效益评估中的运用 总被引：1，自引：0，他引：1
童康 《大学.研究与评价》2007,(1)
DEA(数据包络分析)模型在关于多指标输入与多指标输出的相对效率评价中具有独特优势。根据某师范大学15个文科类院系在7个指标上的效益评估实例分析表明,高校内部院系效益评估在运用DEA模型时应兼顾或关注其所具有的适用性与不适用性的方面,综合运用多种评估方法。 相似文献