高沸点自动车辆不冻液的研制

汽车不冻液的研究开发与车型、行驶环境及制造成本密切相关,现通过实验对高沸点自动车辆不冻液的研制进行简要论述。     

车辆电气及电子设备起动低电压的供电环境条件和试验标准解析

新版ISO标准已将车载电气及电子设备的起动低电压的供电环境条件和试验做了修订。本文对新国家标准起草中一些技术背景和标准文字中的未尽之言以及一些试验实践中应予把握的要点做了进一步的阐述。为相关专业人员在今后的标准执行中更好地应用提供些建议。     

Evidence of a homeowner-renter gap for electric vehicles

This paper provides the first empirical analysis of the homeowner-renter gap for electric vehicles. Using newly-available U.S. nationally representative data, the analysis shows that homeowners are three times more likely than renters to own an electric vehicle. The gap is highly statistically significant, and remains even after controlling for income. For example, among households with annual income between $75,000 and $100,000, 1 in 130 homeowners owns an electric vehicle, compared to 1 in 370 renters. Additional controls do little to narrow the gap. The paper argues that this is a version of what economists have called the “landlord-tenant’’ problem, and briefly discusses potential policy implications.     

A Frontier Approach to Testing the Averch–Johnson Hypothesis

The mathematical programming technique Data Envelopment Analysis is used to test the famous hypothesis of Averch and Johnson that utility regulation leads to overuse of capital because the regulated firm earns a return s greater than its cost of capital r, an implicit capital subsidy resulting in allocative inefficiency. Technical and allocative inefficiency are based on cost and production frontiers from 337 electric generating plants using 1970 data, and r is based on the Capital Asset Pricing Model. Significant capital overuse and general failure to minimize costs is detected, but a second‐step regression analysis finds no relationship between the overuse and the s–r subsidy. A small updated data set covering the period 1980–2004 suggests that overuse of capital is no longer a problem, a result that may be owing to recente deregulation and restructuring.     

并联混合动力汽车性能仿真分析

文章建立了并联混合动力汽车的动力性能数学模型,并在MATLAB平台下开发了并联混合动力汽车动力性能仿真软件系统。基于此软件,对某并联混合动力汽车的动力性能进行了仿真,并将其与试验结果进行了对比,证明了模型的有效性。最后,依据仿真结果,分析了影响并联混合动力汽车动力性能的各项参数,并据此提出了改进其性能参数以提高其动力性能的方法。     

便携式心电监护仪中信号采集电路的设计

本文介绍了一种便携式心电监护系统中信号采集电路的设计。该信号采集电路具有采集心电信号和检测R波等功能。采用AD620作为放大器核心元件,使系统具有低噪音、低漂移和高信噪比等优点,而且成本低廉,体积小,使用方便。     

基于供应链的电网物资集中采购管理

通过对传统采购与供应链采购的比较,分析了供应链采购对提高江苏省电力公司物资集中采购管理水平和经济效益的重要性。根据电网物资采购管理的特点,论述了基于供应链采购理论,现阶段公司物资集中采购的工作内容。     

基于帕利普分析体系下格力电器财务分析

随着中国经济的迅猛发展,资本市场已经逐渐成熟和完善,家电制造业企业的竞争由价格之争逐渐转变为企业战略的竞争。论文以格力电器为例展开分析,将格力电器近三年的盈利能力指标、营运能力指标、偿债能力指标进行纵向对比,并借助帕利普财务分析体系将格力电器可持续增长率进行层层分解展开,从而分析了解其财务状况,探究企业如何达到自身利益最大化。     

基于EVA的电力上市公司绩效与内部治理结构关系实证分析

本文以我国2002年电力上市公司为样本,运用多元回归法,对电力企业的绩效与其内部治理结构之间的关系进行了实证分析。研究表明,股权结构越集中,电力企业的绩效越差;高管人员的激励和执行董事的比例与企业的绩效正相关;董事会、监事会的规模对电力企业的绩效没有影响。电力企业业绩的提高关键在于保持合理的股权结构和建立有效的激励机制。