Statistical Analyses and Modelling of the Mixing Process of Euro Coins in Germany and Europe

This paper reports on the mixing of Euro coins from different countries of origin in Europe, which started on 1 January 2002. There is an interesting conclusion: that the mobility of small and large denominations is different. The long‐term behaviour of the mixing process is studied using a simple deterministic model and data from Germany, France and the Netherlands. The analysis leads to predictions about the future progress of the mixing process.     

浅析21世纪中小企业文化建设

伴随新世纪的来临和中国入世,国内外市场竞争日趋激烈,企业为适应市场竞争,日益重视通过企业文化建设来提升企业竞争力,中小企业也不例外。从企业文化对中小企业发展的现实意义入手,分析文化建设的必要性,并从企业价值观的培育、特色企业文化的塑造和企业文化的发展等三个方面阐述了新世纪中小企业文化建设的基本思路。     

中国就业市场中的性别歧视——对公众认知率的研究

调查结果表明:女性更关注工作过程中的性别歧视和职业隔离的性别歧视现象,女性仅对应聘过程中的性别歧视现象如女性的相貌、身高等要求、外来打工妹的应聘两个问题的认知率高于男性;女性对性骚扰性别歧视认知率与男性没有显著差异;公众对各种性别歧视现象的总体认知水平不高.     

企业环境道德建设刍议

搞好企业环境保护工作,必须提高企业领导和广大员工的环境道德素质。通过加强环境道德建设,推动企业环保工作的顺利开展和创新。同时,政府应营造企业环境道德建设的良好社会环境。     

关于人民币汇率问题的几点思考

人民币汇率不存在被严重低估的问题 ,升值没有客观必然性。目前人民币升值面临巨大压力 ,其主要原因在于我国不合理的外部均衡结构。人民币在未来也不会很快呈现出不断升值的变化趋势 ,中长期内的汇率变动趋势尚有待于观察 ,贬值压力同样不可低估。维持人民币汇率较长时期的稳定 ,延缓升值进程的发生 ,具有非常重要的战略意义     

The analysis of incomplete data using stochastic covariates

In the development of many diseases there are often associated random variables which continuously reflect the progress of a subject towards the final expression of the disease (failure). At any given time these processes, which we call stochastic covariates, may provide information about the current hazard and the remaining time to failure. Likewise, in situations when the specific times of key prior events are not known, such as the time of onset of an occult tumour or the time of infection with HIV-1, it may be possible to identify a stochastic covariate which reveals, indirectly, when the event of interest occurred. The analysis of carcinogenicity trials which involve occult tumours is usually based on the time of death or sacrifice and an indicator of tumour presence for each animal in the experiment. However, the size of an occult tumour observed at the endpoint represents data concerning tumour development which may convey additional information concerning both the tumour incidence rate and the rate of death to which tumour-bearing animals are subject. We develop a stochastic model for tumour growth and suggest different ways in which the effect of this growth on the hazard of failure might be modelled. Using a combined model for tumour growth and additive competing risks of death, we show that if this tumour size information is used, assumptions concerning tumour lethality, the context of observation or multiple sacrifice times are no longer necessary in order to estimate the tumour incidence rate. Parametric estimation based on the method of maximum likelihood is outlined and is applied to simulated data from the combined model. The results of this limited study confirm that use of the stochastic covariate tumour size results in more precise estimation of the incidence rate for occult tumours.     

隆线溞(Daphnia carinata king)的呼吸代谢测定

本文用Winkler法测定隆线溞(Caphnia carinata king)不同龄期个体的耗氧量及二幼龄个体在不同温度下的耗氧量。测得幼龄与成龄两阶段,其耗氧量分别以4.88×10~(-2)与1.695×10~(-1)的速率随体重增加而增大,耗氧率则分别随体重的增加而逐渐降低;在常温下,隆线溞耗氧量Y与温度X呈Y=3.69×10~(-3)×1.07~x的指数函数关系,由此得到,17℃—19℃是隆线搔生长速率快而耗氧量较小的最适人工培养温度。     

我国网络经济发展研究

阐述了网络经济的特点及其我国网络经济的现状和发展的必要性 ,提出建立适于网络经济发展的大环境、更新观念、注重人才培养、完善金融体系、建立虚拟企业和发展电子商务等几个方面的发展途径 ,并对利用网络经济的后发优势实现经济的跨跃式发展进行了探讨。     

企业效益评价因子分析模型及应用

本文将因子分析方法应用于社会科学领域的经济评价系统。从一些错综复杂的经济现象中找出少数几个主因子,每一个主因子代表经济变量之间相互依赖的一种经济作用,抓住这些主因子就可以帮助我们对复杂的经济问题进行分析和解释。在简要介绍因子模型以后,从实证分析的角度,选取深沪股市高科技板块 2 0家上市公司1998年中期的一系列经济评价指标,采用因子分析方法,并借助社会科学统计软件SPSS,进行企业的综合经济效益分析评价,得出因子分析是一种进行企业综合效益评价的有效方法。     

社会资本与我国家族企业的发展

改革开放以来,我国家族企业迅速崛起。此现象按新古典经济学的理论无法解释,因为家族企业创业时既缺少物质资本,又缺少人力资本,也没有技术支持,甚至连存在的合法性都成问题。其实,经济增长不仅需要物质资本和人力资本,还需要社会资本。家族企业之所以在夹缝中突起,很大程度依靠其深厚的社会资本。但也要看到,如果社会资本不能应经济发展而提高,就可能走向反面,成为家族企业发展的障碍。