具有生存性的WDM网络性能分析

研究了在动态业务量时,可调谐光收发器和波长变换器对生存性WDM网络性能的影响。通过在NSFNET、CERNET、MESH-TORUS网络中的仿真,又从网络阻塞率方面研究了两者对WDM网络性能的影响。研究结果表明,在业务量为动态的生存性WDM网络中,可调谐光收发器和波长变换器对网络的性能都有显著的提高,但波长变换器对网络性能的改善要大于可调谐光收发器。     

关于高等学校教师流动的探讨

高校教师是高层次的教学、文化和科技工作者 ,在市场经济体制下必然成为各用人单位争取引进的对象。高校教师的流动具有频繁性、方式的多样性、失衡性等特点。究其原因有需要因素、环境因素和文化因素。采取协调、控制和顺应高校教师需要 ,创新激励机制 ,发挥人才市场导向功能等对策 ,可以促进高校教师合理流动     

翻译中的若干技巧

听、说、读、写、译能准确反映出一名英语学习者的英语掌握程度 ,而若想译得准确、流利 ,这的确存在一定的难度。着重阐述了翻译(英译汉 )的标准、方法和若干实用的基本技巧 ,这些技巧包括 :转换法 ,增减法 ,正反、反正表达法和分句、合句法等。如掌握了这些技巧 ,定能起到事半功倍的作用     

简论诗的意象运动

诗的意象运动的动力源在于情感 ,是情的流动引起包括情与理两端的意的流动 ,又是情和意的流动造成象的跃动。因为情和意如气体或液体呈线型流动 ,像如固体作块状跃动 ,所以在诗的意象运动中 ,往往出现象断而意连的状况。     

Population Policy in Early Victorian England

This paper argues that the generally-held belief that there was no population policy in Great Britain during its fertility transition is incorrect. There were, in fact, clear and implicit and explicit policies in place by the early 19th Century which aimed at reducing population growth. These were negative, involving elimination of family allowances (the famous Poor Laws), and also positive, through subsidised emigration and ``transportation' of felons to the colonies. Moreover, a changed ``ideation' on the part of the nation's political, intellectual and spiritual leaders, changed norms about marriage and child-bearing, raising sharply the perceived economic and psychic cost of children. Lacking acceptable means to control pregnancies, many working class women resorted to abortion, infanticide and child abandonment to reduce their family size. The policy's actual impact on overall fertility is uncertain but it did constitute a deliberate attempt by society to affect demographic behaviour and outcomes.     

The State, Institutional Transition and the Creation of New Urban Poverty in China

Since the 1990s, the introduction of a market economy and the process of rapid urbanization have been accompanied by a new urban poverty related to lay‐offs and unemployment as well as by large‐scale rural–urban migration, which is different from the traditional urban poverty of the ‘Three Nos’ (no relatives or dependants, no working capacity and no source of income). This article focuses on new urban poverty in China under market transition and discusses the causes of poverty creation. Instead of considering Chinese new urban poverty only as a result of market mechanisms, it argues that the state as the manipulator of institutions and policies does matter in the creation of new urban poverty, and that the cleavages between the old and new institutions further intensify it. Specifically, the following aspects of the creation of new urban poverty are examined in detail: the adjustment of industrial policy, the reform of state‐owned enterprises, evolution of the household registration system, and the transformation of the welfare state.     

社会保障转制成本的理论与对策分析

在社会保障制度转换过程中,所有国家都会面临制度转换成本的负担问题。中国要顺利实现社会保障制度由现收现付制向部分积累制转变,政府必须承担新旧制度衔接过程中的全部转制成本。中国可借鉴智利“认可债券”发行经验,以解决目前社会保障资金运行中凸显的个人账户空账运行问题。中国也可借鉴美国“确定受益制”和“确定供款制”两种企业年金计划的成功推行经验,扩大企业补充保险支出,缩小国家基本保险支出,最终减轻政府财政负担,推动国家经济稳定增长。     

Race and Population Change: A Longitudinal Look at Cleveland Neighborhoods

This paper investigates the relationship of racial composition to neighborhood population change from 1910 to 1990 in the Cleveland metropolitan area. To better understand the long-term dynamics of urban neighborhood change, we focus our analysis upon the longitudinal relationship of race, socioeconomic status, and life cycle stage to changes in neighborhood population densities. First, we find that the more established neighborhoods of the African-American community have experienced dramatic declines in population since 1950, a pattern that represents a clear change from the earlier part of the twentieth century. Second, population loss is experienced through a variety of mechanisms, including the demolition of dwellings, the increase in housing vacancy, and the decline of household size. Third, much of this population loss should be interpreted within the context of high economic distress, occurring most frequently in older African-American communities. Over time, economic distress appears to be more important than race in and of itself in leading to the loss of neighborhood populations.     

均线形态组合在证券分析中的应用

应用结构模式识别的方法建立多阶均线形态组合序列通过对股市历史数据的变换和分析考查各形态组合序列对应的盈利和亏损概率建立新的证券投资分析方法即均线形态组合预测法其优点是可以部分弥补传统技术分析中的滞后性和不确定性能根据市场的变化及时调整相应的参数指标有效提高预测的成功率并易用计算机作出识别     

社会转型时代的管理创新

人类社会已经步入了 2 1世纪 ,我们正处在社会的转型时代。知识经济的步步紧逼 ,无时无刻不在激励着人们在社会生产经营等各项活动中不断创新。管理的创新则是创新的灵魂。对创新资源的深入发掘 ,引出了我们对社会转型时代管理创新的内涵、原则、方法的讨论