高斯型混合双多模噪声模型分析

本文以一类高斯型混合非高斯噪声双模噪声为背景噪声,详细分析了二进制数字调制系统的抗噪声性能。为研究更一般的情形,本文提出了窄带多模过程的数学模型,进行了较详细的研究,给出了混合噪声中信号检测的一般方法,是对原建立在高斯噪声基础上通信与信号处理理论的完善和补充,有一定的普遍意义。在理论分析的基础上,最后给出了仿真结果并进行了分析。     

The Market Quality of Dealer versus Hybrid Markets: The Case of Moderately Liquid Securities

Abstract:  Over the last decade, electronic limit-order trading systems have been sweeping securities exchanges around the world. This paper studies a transitional case, namely, the commencement of trading of a group of moderately liquid stocks on SETS of the London Stock Exchange. The evidence reveals that the liquidity of those stocks dropped substantially after the introduction of the limit order book and the removal of the market makers' obligations. This transition provides an example that a hybrid market with a limit order book and voluntary dealers may not perform as well as a dealership market with obligatory market makers.     

混合动力汽车动力切换仿真模型及其分析

混合动力汽车的发动机与电动机之间的动力切换由行驶车速控制,设计模糊逻辑控制策略,以油门踏板开度和蓄电池荷电状态（SOC值）判定转换车速值。基于ADVISOR仿真分析动力切换车速值对汽车经济性和动力性的影响。     

德国公司治理模式存在的问题与改革

经济全球化尤其是欧盟一体化进程加快、放松管制与竞争加剧导致德国从90年代开始推行公司治理改革。但由于制度刚性和路径依赖,德国公司治理模式的转变显然是渐进的且不会完全转向英美模式。本文对传统德国公司治理模式的特点,存在的问题和改革措施进行了分析。     

Performing catharsis: The use of online discussion forums in organizational change

Online discussion forums have been used to both support and resist organizational change. Our empirical study examined how employees in one organization used an online forum to help them deal discursively with changes that they perceived as threatening to their identity. In particular, we found that the postings of one key individual were central in framing the organizational changes in a way that had powerful cathartic consequences for employees’ feelings of anger and loss of face. Paradoxically, however, we also found that such use of the online forum had the contradictory consequence of helping to facilitate the very changes that employees perceived to be problematic.     

国企分类改革下国有出资人模式的重构

分类改革是我国此轮国企改革的核心。要实现分类改革的目标,必须对关乎国企管理体制的国有出资人模式进行重新审视。我国国有出资人模式主要有集权模式和分权模式两种。但无论是以国资委为代表的集权出资模式,还是以行业或地域为标准的分权出资模式,其主要缺陷在于没有回应国企分类改革的要求,没有区分商业类国企与公益类国企而分别构建出资人制度。实际上,在国企分类改革下,有必要确立集权模式与双重模式并行的混合出资人模式。针对商业类国企采国资委集权出资模式,由国资委专司“管资本”,剥离其监管企业的职能;而针对公益类国企采功能双重出资模式,由多个部门分工协作,既“管资本”也“管企业”,实现有效监管的职能。