Measuring firm performance: Differentiating between uncontrollable and controllable bad outputs

This paper introduces a new model that differentiates between controllable and uncontrollable bad outputs in the measurement of firm performance; the airline industry is used as the empirical example. The model allows us to measure technical inefficiency, as well as the inefficiency in the production of bad outputs, and the inefficiency in the investments allocated to the reduction of uncontrollable bad outputs. Moreover, we provide a direct measure of the total cost of controllable bad outputs. As the model involves a number of latent (unobservable) variables that cannot be easily integrated out of the likelihood function without producing complicated expressions, we resort to Bayesian techniques. We find notable differences in inefficiency across airlines. More importantly though, we find that the production of bad or undesirable outputs impose significant costs on airlines. However, these cost issues could be reduced if airlines invest more in maintenance and service training.     

嘉绍大桥钢锚箱制作质量控制方法研究

根据嘉绍大桥钢锚箱的结构特点着重介绍嘉绍大桥钢锚箱制作难点及质量控制方法,并具体阐述了通过运用强化过程控制和三检制相结合的精细化质量控制法及各项措施的实施,有效的控制了嘉绍大桥钢锚箱的产品质量,一次报验合格率100%,桥址架设顺利。     

一维SnO2纳米材料的可控合成及其纳米催化发光传感器的应用

本文采用碳纳米管（CNT）为模板，通过液相沉积法可控合成了一维SnO2纳米材料：SnO2-CNT纳米复合材料、SnO2纳米棒，均匀规则的一维SnO2纳米棒仅仅通过改变煅烧SnO2-CNT纳米复合材料的反应温度获得。这两种一维纳米材料可以显著改善纳米表面气-固相催化发光性能，阐明了纳米材料的比表面积、结构与其催化发光的关系，建立了一种新型的一维SnO2纳米材料催化发光的乙醇传感器。     

Measuring aeronautical service efficiency and commercial service efficiency of East Asia airport companies: An application of Network Data Envelopment Analysis

Improving operation efficiency has become an important development strategy for many airport companies. However, there is little research on these companies' operating process decomposition or discussing the causes of inefficiency in sub-processes. This study evaluates the overall efficiency and the operational efficiencies of aeronautical service sub-process and commercial service sub-process for 10 East Asia airport companies from 2009 to 2013 using Network Data Envelopment Analysis (NDEA) and identifies the key influencing factors of respective sub-processes efficiency by employing the Panel Data model. The first-stage NDEA results indicate that only Airport Authority Hong Kong in 2012 and 2013 performed efficiently in both sub-processes and achieved overall efficiency. The overall efficiencies of all other companies are not high. During the entire study period, in aeronautical service sub-process, Beijing Capital International Airport Co., Ltd. and Shanghai International Airport Co., Ltd. performed efficiently, while in commercial service sub-process, only Hong Kong airport performed efficiently. The second-stage regression analysis implies the number of airlines served and the number of destinations have significant and positive influences on the efficiency of aeronautical service. Non-aeronautical revenues and service quality have significant and positive influences on commercial service efficiency.     

材料制备与合成课程教学改革与实践

材料制备与合成课程是我校无机材料专业开设的一门专业必修课,内容多,涉及面广,存在着一定的教学难度。应从教材选择、教学内容、教学方法和手段等方面进行改革,以激发学生学习兴趣,提高课堂教学质量。     

A bicriteria approach to maximize the weighted number of just-in-time jobs and to minimize the total resource consumption cost in a two-machine flow-shop scheduling system

We analyze a two-machine flow-shop scheduling problem in which the job processing times are controllable by the allocation of resources to the job operations and the resources can be used in discrete quantities. We provide a bicriteria analysis of the problem where the first criterion is to maximize the weighted number of just-in-time jobs and the second criterion is to minimize the total resource consumption cost. We prove that although the problem is known to be NP-hard even for constant processing times, a pseudo-polynomial time algorithm for its solution exists. In addition, we show how the pseudo-polynomial time algorithm can be converted into a two-dimensional fully polynomial approximation scheme for finding an approximate Pareto solution.     

我国省域水资源的可持续利用初探*——以辽宁山东等省供水量指标为基础数据

水资源承载力的确定是经济可持续发展决策的前提。本文通过相对水资源承载力的动态分析方法,透析辽宁、山东等省份水资源短缺和超负载的现状,揭示可控因子,进而提出水资源可持续利用的对策。     

企业权益筹资风险评估研究

传统财务理论将企业筹资风险定义为“由于负债而给企业财务成果带来的不确定性”,认为筹资风险就是负债风险。这种理论导致企业管理者只重视负债筹资风险而忽视权益筹资风险。事实上,企业筹资风险既包括负债筹资风险,又包括权益筹资风险,同样会带来严重后果。为了加强权益筹资风险的管理,本文从权益筹资风险的特征、计量、风险预警控制区域等方面进行了探讨,试图建立企业权益筹资风险评价机制,从而弥补传统筹资风险理论的缺陷,为企业进行权益筹资风险的科学管理提供有效依据,使企业筹资风险管理更加科学化、规范化。     

成人教学管理中的可控与不可控因素分析

随着经济社会的快速发展,成人教育必须提高教学质量、加强培养的针对性来应对社会不断提升的要求。由于成人教育的特殊性和复杂性,在其教学管理过程中必然会有相当多的因素发生作用,不同程度地影响到教学成效,因此要区分其中的可控与不可控因素,并尽可能将不可控因素转化为可控因素,从而使成人教育更好地服务于经济社会。     

高等院校建设项目多视角立体审计模式探讨

建设项目的实施是一个系统工程,也是动态过程,对项目的建设实施有效的审计监督,是合理控制工程造价,提高投资效益的有效途径。本文通过高等院校建设项目审计现状的调研,对建设项目实施的全过程进行分析,针对影响项目投资的相关因素和关键环节,提出对项目建设实施一体化管理,多节点控制,多视角审计的新模式,与同行探讨。