轮胎温度场有限元分析系统的设计

文章针对轮胎在行驶过程中各部位胶料受热情况不一致这一特点,深入地研究了轮胎滚动过程中的稳态热平衡状态。并通过经验数据的积累,从轮胎结构的参数化设计、断面网格划分与有限元分析、温度场计算及结果输出5个角度,设计出轮胎温度场有限元分析系统,证明了输出的温度场云图与现实中稳态轮胎温度场的温度分布情况一致。     

试论我国职业经理人制度及其供求均衡的条件

职业经理人是经济发展到一定时期的产物.随着我国经济体制改革的不断深化,我国市场经济的不断发展,以及国际国内市场竞争格局的不断变化,职业经理人在经济发展过程中的重要作用日益凸现,我国急需建立职业经理人制度,培养一大批职业经理人,完善职业经理人市场,以实现职业经理人供求均衡.     

模糊自动控制理论在高速公路机电设备中的应用

文章介绍了在直流并励电动机控制中引进模糊自动控制,可以实现电动机恒流起动、恒速运行,降低电机的故障率,保障它的运行。     

论企业的双重属性

本文从企业人、资产、产品、价值、环境等与企业行为相关的五方面较为全面地分析了企业双重属性的内涵,指出企业必须认识到自己所天然具有的社会及经济属性,并以此作为指导企业发展设计和规范企业行为的意识准备。     

Double Dividend with Involuntary Unemployment: Efficiency and Intergenerational Equity

This paper analyzes the double dividend and distributional issues within an overlapping generations model framework with involuntary unemployment. We characterize the necessary conditions needed to obtain a double dividend, when the revenue of the environmental tax is recycled by a variation of the labor tax rate. We show that an employment dividend may occur without any efficiency dividend and that the young generation is not always harmed by the fiscal reform, even without any intergenerational transfers. Therefore, three dividends (environmental, efficiency and intergenerational equity) can occur simultaneously.     

解读2005年中国国际收支平衡表

国际收支平衡表不仅综合记载了一国在一定时期内与世界各国的经济往来的情况和在世界经济中的地位及其消长对比情况,而且还集中反映了该国的经济类型和经济结构。2005年,中国的国际收支巨额顺差,具有鲜明特色.透过国际收支平衡表,可以发现中国国际收支的结构特征、问题所在,进而提出改进措施和政策建议。     

Thermodynamics and process analysis for future economic scenarios

Economists are increasingly interested in forecasting future costs and benefits of policies for dealing with materials/energy fluxes, polluting emissions and environmental impacts on various scales, from sectoral to global. Computable general equilibrium (CGE) models are currently popular because they project demand and industrial structure into the future, along an equilibrium path. But they are applicable only to the extent that structural changes occur in or near equilibrium, independent of radical technological (or social) change. The alternative tool for analyzing economic implications of scenario assumptions is to use Leontief-type Input-Output (I-O) models. I-O models are unable to endogenize structural shifts (changing I-O coefficients). However, this can be a virtue when considering radical rather than incremental shifts. Postulated I-O tables can be used independently to check the internal consistency of scenarios. Or I-O models can be used to generate scenarios by linking them to econometric macro-drivers (which can, in principle, be CGE models). Explicit process analysis can be integrated, in principle, with I-O models. This hybrid scheme provides a natural means of satisfying physical constraints, especially the first and second laws of thermodynamics. This is important, to avoid constructing scenarios based on physically impossible processes. Process analysis is really the only available tool for constructing physically plausible alternative future I-O tables, and generating materials/energy and waste emissions coefficients. Explicit process analysis also helps avoid several problems characteristic of pure CGE or I-O models, viz. (1) aggregation errors (2) inability to handle arbitrary combinations of co-product and co-input relationships and (3) inability to reflect certain non-linearities such as internal feedback loops.     

企业研究与开发绩效评价:现状分析及改进思路

由于研发活动固有的特点,企业研究与开发(以下也称研发或R&D)的绩效评价一直是理论和实践上的难题。通过分析影响企业研发绩效评价因素,探讨现行的企业绩效评价体系存在的问题,得出了可以利用平衡计分卡设计企业研发绩效评价指标体系的结论。     

消费品市场有效供给不足的成因及对策

在买方市场条件下 ,我国消费品市场有效供给不足表现为 :消费品市场上的商品价位与消费者的市场收入层次错位、名优品牌和知名品牌商品少、城乡消费鸿沟加深。造成消费品市场有效供给不足的原因是 :消费品生产的市场定位出现误差、生产技术含量低、市场营销能力不强等。要达到消费品市场均衡 ,必须要做好市场定位、提高产品的技术含量、推进名牌战略、降低经营成本     

Real Exchange Rate and External Balance: How Important Are Price Deflators?

This paper contrasts real effective exchange rate (REER) measures based on different deflators (consumer price index, GDP deflator, and unit labor cost) and discusses potential implications for the link—or lack thereof—between the REER and the external balance. We begin by comparing the evolution of different measures of REER to confirm that the choice of deflator plays a significant role in REER movements. A subsequent empirical investigation based on 35 developed and emerging market economies over 1995–2017 yields comprehensive and robust evidence that only the REER deflated by unit labor cost exhibits contemporaneous patterns consistent with the expenditure-switching mechanism. Finally, we show that a standard open-economy model with nominal rigidities and trade in intermediate goods is able to generate these aforementioned patterns.