Carbon Trading with Imperfectly Observable Emissions

The Kyoto Protocol foresees emission trading but does not yet specify verification of (uncertain) emissions. This paper analyses a setting in which parties can meet their emission targets by reducing emissions, by investing in monitoring (reducing uncertainty of emissions) or by (bilaterally) trading permits. We derive the optimality conditions and carry out various numerical simulations. Our applications suggest that including uncertainty could increase compliance costs for the USA, Japan and the European Union. Central Europe and the Former Soviet Union might be able to gain from trading due to higher permit prices. Emissions trading could also lower aggregate uncertainty on emissions.     

激励扭曲与努力的无效分配——基于银行客户经理制模拟利润考核的有效性分析

文章首先通过运用多任务委托代理模型分析商业银行模拟利润考核制度的激励效应和扭曲效应,以及可能导致客户经理努力的无效分配;然后扩展分析银行模拟利润考核的有效性和模拟利润成本之间的权衡以及模拟利润的最优精确水平;最后结合我国商业银行的现实状况引申出与商业银行客户经理模拟利润考核制度相关的结论与政策建议。     

Simulation driven inferences for multiply imputed longitudinal datasets*

In this article, we demonstrate by simulations that rich imputation models for incomplete longitudinal datasets produce more calibrated estimates in terms of reduced bias and higher coverage rates without duly deflating the efficiency. We argue that the use of supplementary variables that are thought to be potential causes or correlates of missingness or outcomes in the imputation process may lead to better inferential results in comparison to simpler imputation models. The liberal use of these variables is recommended as opposed to the conservative strategy.     

无刷直流电机控制系统的建模及仿真

简要介绍了无刷直流电机的工作原理,建立了BLDCM数学模型及simulink仿真模型.仿真结果表明波形符合理论分析,系统具有良好的静、动态特性.     

相关多样性对企业创新的非线性影响——基于上市公司的PSTR实证研究

依据雅各布外部性理论探究相关多样性对企业创新的影响，基于2007-2013年上市公司数据，运用PSTR模型实证检验相关多样性对企业创新的非线性影响。研究发现：相关多样性对企业创新有正向作用；随着研发投入的不断增加，相关多样性对企业创新产生非线性影响；企业所有制性质不同，相关多样性对企业创新的非线性影响也不相同；随着研发投入的不断增加且突破某一临界值，在更高的研发投入诱导下，中、西部地区相关多样性对辖区企业创新产生更为强烈的正向作用。     

基于计算机仿真的堆石坝坝面流水施工方案研究

根据流水施工的基本原理和堆石坝填筑的施工特点，利用计算机仿真技术对堆石坝施工交通运输系统进行模拟，考虑了堆石坝土石方挖运对其坝面流水施工的影响，合理确定出坝面流水施工方案，使其既能够满足施工进度所要求的填筑强度，又能够保证各分区可以进行流水施工。     

物流系统建模方法的研究

通过对现有系统建模分析方法的比较和分析,针对物流系统提出了一种集成建模分析GI-SIM法。该方法以概念、功能和动态建模思想为基础,以GRAI格、IDEFO和仿真技术为建模工具,满足了复杂物流系统的建模要求。最后,给出了GI-SIM法的建模步骤,并对其进行了总结和评价。     

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。     

物流系统规划-仿真集成化技术研究

通过对物流系统规划与仿真模型的分析，归纳出系统规划模型与系统仿真模型的共有属性和关系，采用集成化的技术，建立集成化规划一仿真系统模型，并通过Solidworks和Flexsim研究实现其集成化，并在相关课题中获得成功应用，突破了现有软件在规划与仿真之间数据共享的壁垒。     

Agglomeration in an innovative and differentiated industry with heterogeneous knowledge spillovers

This paper introduces an agent-based simulation model to study the technological development, the economic performance of firms and the evolution of agglomerations in a differentiated industry. The analysis is based on the interaction and behavior of firms, which might share knowledge but at the same time are competitors on the goods markets. Firms do not only compete with quantities they can also introduce process and product innovations. The level of knowledge of a firm describes the capabilities to perform innovations. Knowledge can be accumulated by investing in R&D and by knowledge spillover, which depend on geographical and technological proximity. Simulation runs show that there is an incentive to agglomerate in young industries and that geographical proximity enhances innovation, especially the number of product innovations.