基于技术差距的长江水系主要内河港口效率

长江水系港口效率评价对科学反映港口效率现状,实现港口有效运营,建设长江经济带具有重要意义。为了弥补现有关于港口效率研究中忽略港口之间存在技术水平异质性的不足,从技术差异影响港口效率这一视角出发,在DEA分析的基础上结合共同边界技术（Meta Frontier production function）,对长江水系主干线21家主要内河港口2010～2012年的共同效率、组群效率以及共同技术比率进行分析。结果显示,长江水系三大群组共同效率均值最大仅为027,总体上效率偏低,存在很大提升空间;群组效率均值分别为058、067和027,不同群组之间技术水平存在差异,技术水平受经济发展程度和地理位置的影响;群组三的共同技术比率为1,虽然达到了潜在最佳共同边界技术水平,但普遍存在管理组织上的无效率,群组一和群组二不论是技术水平还是管理效率都有待进一步提升;长江水系主要内河港口普遍存在严重的投入拥挤、产出不足现象。最后,就如何提升长江水系内河港口效率提出了建议。     

广东高校科技资源投入产出效率研究

应用数据包络分析法（DEA）,根据广东省2000年～2009年的科技年鉴数据对广东省高等教育的科技资源投入和产出进行了评价和分析。结果表明：1999～2007年广东高校科技资源投入产出效率整体状况良好;但也存在DEA有效与非有效年份;不同产出指标的效率水平存在差异且变化趋势不同;各年度纯技术效率普遍高于其规模效率;在非有效年份增加科技资源投入有利于提高高等院校的科技创新效率。     

基于DEA模型的广东省级工程中心技术效率研究

以广东21个城市为决策单元,选用数据包络分析（DEA）中的C2R和BC2模型,评价分析2008年广东省级工程中心技术效率情况。研究表明：全省省级工程中心技术效率总体水平偏低,但珠三角地区相对比较高;纯技术非有效问题比较严重,规模非有效问题非常突出;纯技术效率对技术效率有显著影响;16个无效城市的省级工程中心资源投入冗余比较大,产出不足问题比较突出,尤其是专利授权数。提出了制定省级工程中心发展规划、转变研发重点、实施标杆管理等提升省级工程中心技术效率的政策建议。     

基于DEA的汽车工业企业投资有效性分析

运用数据包络分析方法，建立了我国主要汽车制造企业投资相对有效性的评价模型。该模型测算了各企业的总体效率、纯技术效率、纯规模效率及其规模效益状况，并且利用“投影”分析，对非DEA有效的决策单元(DMU)的投入产出值进行了调整，使之达到相对有效。文章进而结合DEA改进值，对非DEA有效的企业提出使其达到DEA有效的可行措施，同时分析了企业经营效率与资源配置效率之间的关系，为企业管理者进行科学决策提供依据和参考。     

基于DEA的中国包装行业资源配置效率研究

针对中国包装行业的资源配置效率,运用数据包络分析（DEA）方法构建评价模型,并以2005—2016年包装行业的投入产出数据为依据,通过DEAP软件进行评价分析。研究结果表明：技术是造成包装行业资源配置无效的主要原因;产出要素中的专利授权数出现产出不足现象,投入各要素出现了不同程度的冗余。针对研究结果,提出了一些相应的改进建议。     

基于三阶段DEA模型的珠三角港口效率研究

在全球经济复苏乏力,国内外贸"双降"的大背景下,港口效率的高低决定港口发展的成败。为了评价珠三角地区港口效率,选取2010~2014年珠三角地区9个市港口的投入产出面板数据,用三阶段DEA方法对珠三角港口效率进行实证分析。研究结果表明,珠三角地区港口综合效率整体偏低;规模无效率是综合效率低下的主要原因;珠三角地区港口的综合效率、纯技术效率和规模效率均呈逐年递增的趋势,但是上升幅度不明显。     

精益实践对企业运营绩效的影响——内部整合的中介作用北大核心CSSCI

为研究精益实践、内部整合与企业运营绩效之间的关系,利用我国359家制造企业的数据,采用层次回归分析对假设进行验证,揭示了精益实践通过内部整合影响企业运营绩效的作用机理。研究结果表明:精益实践对质量、成本、交付、柔性四个维度的企业运营绩效均有显著的正向影响,信息维度及团队维度的内部整合在其中起到部分中介的作用。本研究丰富与完善了精益实践的研究,对企业开展精益实践具有一定的指导意义。     

精益实践对企业运营绩效的影响——内部整合的中介作用

为研究精益实践、内部整合与企业运营绩效之间的关系,利用我国359家制造企业的数据,采用层次回归分析对假设进行验证,揭示了精益实践通过内部整合影响企业运营绩效的作用机理。研究结果表明:精益实践对质量、成本、交付、柔性四个维度的企业运营绩效均有显著的正向影响,信息维度及团队维度的内部整合在其中起到部分中介的作用。本研究丰富与完善了精益实践的研究,对企业开展精益实践具有一定的指导意义。     

基于随机前沿分析的上市物流公司技术效率评价

运用随机前沿分析模型,站在整个物流行业的角度,对中国沪深两市18家上市物流公司2003～2009年间的技术效率进行动态测度。结果表明:资本和管理要素投入对产出的影响显著,具有规模经济性,尤其是资本投入;人力资源投入的影响相当弱,且在统计上不显著;18家物流公司的总体技术效率较低,且有逐年下滑的趋势,但下降幅度相当小;运输类公司的效率显然大于港口类;物流公司的技术效率不仅受区域经济因素影响,而且与自身的经营管理水平密切相关。最后,根据评价结果分析存在的问题并提出相应的政策建议。     

基于TRIZ和DEA理论的产品概念设计方法及实证

将DEA方法引入TRIZ应用体系,首先依据TRIZ理论分析顾客需求,选择TRIZ问题解决工具,获得不同的创新方案,然后考虑各种投入要素,利用DEA方法选取最佳方案.该方法有效弥补了TRIZ理论的不足,实证分析充分证实了其合理性和实用性.     

The efficiency analysis of container port production using DEA panel data approaches

Applications of Data Envelopment Analysis (DEA) to container port production have been largely restricted to standard DEA models using cross-sectional data. The efficiency results derived may be biased; for instance, as the result of random effects or a recent investment in future production. In overcoming this problem, panel data on container port production may be more suitable for medium- to long-term efficiency analysis. This paper evaluates available DEA panel data approaches by applying them to a sample of 25 leading container ports. Empirical results validate the necessity of utilizing panel data and reveal that considerable waste exists in container port production. It also provides a basis for assessing the competitiveness of container ports, for benchmarking best practice and identifying specific sources or causes of inefficiency.     

基于DEA的评价模型及其输入输出指标确定

产品包装方案的评价是一个多目标规划问题.应用数据包络分析原理(DEA),通过对包装设计方案的横向比较,构建产品包装方案的评价模型.采用两步法对评价模型求解,首先对输入变量进行比例收缩(或对输出变量进行比例扩张),求出各方案的相对效率;然后计算各方案每项指标的松弛变量.结合包装行业的特点,将越小越好的指标作为输入指标、越大越好的指标作为输出指标,建立了相应的输入输出指标体系.     

A 2*4 all optical decoder switch based on photonic crystal ring resonators

Based on photonic crystal ring resonators and nonlinear Kerr effect in this paper, we proposed a 2*4 all optical decoder switch. Our proposed structure has two logic input ports and one bias input port. This decoder switch has four output ports. Via these two logic input ports, we control the bias signal to transfer toward which output port. We employed numerical methods such as plane wave expansion and finite difference time domain methods for analyzing the proposed structure.     

基于DEA的供电企业安全投入产出分析

供电企业的安全投入产出是一个多投入多产出的复杂系统,有必要对安全投入产出效益进行分析以制定改进措施提高安全投资管理水平。在对供电企业安全投入与安全效益界定的基础上,选取7个输入指标及2个输出指标,建了基于DEA的供电企业安全投入产出模型,并进行了实例分析,发现部分供电企业安全投入产出效率较低,需要对现有投资进行优化。结果表明,DEA法可以对供电企业的安全投入产出效益进行有效评价,从而发现不足优化安全投入成本。     

基于CRLH-TL零阶谐振特性的新型串联功分器

 结构紧凑的功分器是微波信号分离、阵列天线馈电等应用场合的重要器件．利用混合右/左手传输线（CRLH-TL）来设计小尺寸的串联功分器,并对混合右/左手传输线的色散特性进行理论分析．利用贴片电容和微带线电感设计了一种新的混合右/左手传输线,处于零阶谐振状态的混合右/左手不引入相位偏移且波长为无穷大．基于CRLH-TL的零阶谐振特性设计制作了一个工作在2.45 GHz的4路微波功分器．此功分器等幅同相地将输入功率分配到各个输出端口,输出端口位置对功率分配没有影响．使用矢量网络分析仪对该功分器进行了实验测量,结果表明：在2.20~2.65 GHz的频率范围内,功分器各输出端口功率相差在1 dB内;在2.22~2.56 GHz的频率范围内,输出端口的相位差在15°以内．测量结果与仿真结果吻合良好．该微波功分器结构紧凑,可扩展到任意多个输出端口．     

Data envelopment analysis with multiple modes of functioning. Application to reconfigurable manufacturing systems

In principle, data envelopment analysis (DEA) does not consider the possibility, which can occur in practice, of a production system being able to operate in different modes of functioning. In this paper, a new DEA modelling approach is proposed in which the different modes of functioning are taken into account and included in the analysis. The observed input consumption and output production in each mode of functioning is used to derive a mode-specific technology. The overall DEA technology aggregates these mode-specific technologies according to their respective time allocations. The proposed model computes a target operating point for each mode of functioning so that the operation of the overall system is efficient. The proposed approach is applied to assess the technical, cost and allocative efficiency of a reconfigurable manufacturing system. The inputs considered are modules/tools usage, labour and energy consumption. The outputs are the number of units produced of each part type. The production possibility set is determined by previous observations of the system functioning, from which the best practices can be identified. Technical, cost and allocative efficiency scores can be computed. The proposed approach not only generates input cost savings but also lead time reductions.     

A novel proposal for all optical 3 to 8 decoder based on nonlinear ring resonators

In this paper, a 3 to 8 optical decoder was proposed using nonlinear photonic crystal ring resonators. For realizing the 3 to 8 decoder, we combined seven 1 to 2 optical decoders. In the proposed structure, X, Y and Z serve as input ports. By combination of these ports, one can control which output port to be ON. The maximum time delay of the proposed structure is about 6?ps.     

Study the role of non-linear resonant cavities in photonic crystal-based decoder switches

In this paper, we are going to design and propose a novel structure for all optical decoder. The proposed structure is composed of optical power splitters and a four-port optical switch. The four-port optical switch simply is a non-linear optical demulitiplexer. For achieving non-linear behaviour for the demultiplexer, we will employ defect rods made of doped glass which has high Kerr coefficient. The final structure has three input ports and four output ports. Port E acts as enable port, which will be used activating or deactivating the total structure. A and B are the control ports, by which one can control when the structure is active, which port of the structure to be active. The optical intensity of the input ports required appropriate operation of the structure is about 20 W/μm². The maximum switching frequency of the proposed structure is 2 GHz. Reduced input optical intensity is the main characteristics of the present work. Numerical methods such as plane wave expansion and finite difference time domain were used for performing the required calculations.     

Supplier evaluation and selection: an augmented DEA approach

Evaluating and selecting suppliers is an essential part of effectively managing today's dynamic and global supply chains. In this paper, we propose a supplier evaluation and selection methodology based on an extension of data envelopment analysis (DEA) that can evaluate suppliers in an efficient manner. Through the incorporations of a range of virtual standards, the proposed methodology termed augmented DEA, has enhanced discriminatory power over basic DEA models to rank suppliers. In addition, weight constraints are introduced to reduce the possibility of having inappropriate input and output factor weights. We demonstrate the application of augmented DEA with comparison experiments and find that the augmented DEA model has advantages over the basic DEA model as well as the cross-efficiency and super-efficiency models. Finally, we present a case application with data obtained from a communication and aviation electronics company to demonstrate the applicability and use of augmented DEA.