Empirical likelihood confidence intervals for the mean of a population containing many zero values

If a population contains many zero values and the sample size is not very large, the traditional normal approximation‐based confidence intervals for the population mean may have poor coverage probabilities. This problem is substantially reduced by constructing parametric likelihood ratio intervals when an appropriate mixture model can be found. In the context of survey sampling, however, there is a general preference for making minimal assumptions about the population under study. The authors have therefore investigated the coverage properties of nonparametric empirical likelihood confidence intervals for the population mean. They show that under a variety of hypothetical populations, these intervals often outperformed parametric likelihood intervals by having more balanced coverage rates and larger lower bounds. The authors illustrate their methodology using data from the Canadian Labour Force Survey for the year 2000.     

采用二阶特征窗的语音盲分离方法

利用语音信号的短时平稳特性,提出了一种二阶特征窗语音盲分离方法。该方法采用新的联合差分相关矩阵白化算法去除有色噪声影响;用长度等于语音信号基音周期的等距特征窗连续分割预白化观测数据,在每个加窗的数据帧计算不同的时滞协方差矩阵。利用联合近似对角化时滞协方差矩阵集合得到旋转参数,最终达到语音信号的盲分离。该方法消除了有色噪声的影响,只需用到二阶信息就能很好地分离语音信号。仿真实验验证了该方法的有效性。     

社会科技化和加强社会主义精神文明建设

科技社会化是现代社会发展的必然 ,加强科技文明建设是社会主义精神文明建设的重要内容。本文在分析了社会科技化在社会主义精神文明建设中的重要作用的基础上 ,进而具体探讨了科技文明建设的内涵     

创新与核心能力体系研究

创新是企业经营要素的新组合。企业核心能力是企业发展能力中最重要的能力,它源于企业创新。企业创新点,实质在企业价值的“链环”上,企业核心能力的形成,关键在于建立价值链某个环节上的竞争优势,企业应当通过创新培育核心能力体系。而创新必须要有卓越的创意设计、科学的策划和有效的策略。     

改性脲醛树酯粘合剂的研制

本文介绍了三聚氰胺改性脲醛树酯粘合剂的配方、操作工艺及产品性能。     

Against the Law: Labor Protests in China's Rustbelt and Sunbelt

Trevor Dean, Land and Power in Late Medieval Ferrara. The Rule of the Este, 1350–1450 (1988), xiv + 212 (Cambridge University Press, Cambridge, £25.00).

C.J. Wickham, The Mountains and the City. The Tuscan Appennines in the Early Middle Ages (1988), xxxiii + 427, 10 maps (Clarendon Press, Oxford, £40.00).

Peter Clark and David Souden (eds), Migration and Society in Early Modern England (1987), 355 (Hutchinson, £35.00).

Sharon V. Salinger, ’To Serve Well and Faithfully’: Labor and Indentured Servants in Pennsylvania, 1682–1800 (1987), xiv + 192 (Cambridge University Press, Cambridge, £25.00.)

Keith Michael Baker (ed.), The Political Culture of the Old Regime (1987), xxiv + 559 (Pergamon Press, £60.00).

Jean‐Claude Bonnet (ed.), La Carmagnole des Muses. L'Homme de lettres et l'artiste dans la Revolution (1988), 426 (Armand Colin, Paris, 180ff).

Hugh Gough, The Newspaper Press in the French Revolution (1988), 264 (Routledge, £30.00).

Edna Hindie Lemay, La Vie quotidienne des députés aux Etats Généraux: 1789 (1987), 273 (Hachette, 100FF).

Detlef K. Muller, Fritz Ringer and Brian Simon (eds), The Rise of the Modern Educational System. Structural Change and Social Reproduction, 1870–1920 (1987), xiv + 264 (Cambridge University Press, Cambridge, £27.50).

Paul Bew, Conflict and Conciliation in Ireland, 1890–1910: Parnellites and Radical Agrarians (1987), 241 (Clarendon Press, Oxford, £25.00).

Gerard Noiriel, Le Creuset français. Histoire de l'immigration XIXe‐XXe siècles (1988), (Le Seuil, Paris, 160ff).

David Montgomery, The Fall of the House of Labor (1987), 494 (Cambridge University Press, Cambridge, £30.00, paperback £12.95).

John Holford, Reshaping Labour: Organization, Work and Politics in Edinburgh in the Great War and After (1988), xii + 276 (Croom Helm, £30.00).

Bill Lancaster, Radicalism, Co‐operation and Socialism: Leicester Working‐Class Politics 1860–1906 (1987), xxii + 232 (Leicester University Press, Leicester, £27.50).

Michael Savage, The Dynamics of Working‐Class Politics: The Labour Movement in Preston 188o‐1940 (1987), xii + 280 (Cambridge University Press, Cambridge, £25.00).

Lynne Viola, The Best Sons of the Fatherland: Workers in the Vanguard of Soviet Collectivization (1987), x + 285 (Oxford University Press, New York and Oxford, £30.00).

Susan Bridger, Women in the Soviet Countryside: Women's Roles in Rural Development in the Soviet Union (1987), xvii + 259 (Cambridge University Press, Cambridge, £25.00).

Tony Novak, Poverty and the State: An Historical Sociology (1988), xi + 212 (Open University Press, Milton Keynes and Philadelphia, £22.50, paperback

John Clarke, Allan Cochrane and Carol Smart, Ideologies of Welfare: From Dreams to Disillusion (1987), 206 (Hutchinson Education, paperback £7.95).

E.P. Hennock, British Social Reform and German Precedents: The Case of Social Insurance 1880–1914 (1987), vi + 243 (Clarendon Press, Oxford, £25.00).     

成人继续教育中的商务英语写作教学

从2004年初笔者进行的一次问卷调查入手,分析了当前成人继续教育中商务英语写作课堂教学过程中存在的问题。针对调查中反映的问题,提出了一套由案例分析法演化而来的教学模式——基于案例的教学方式(Case-based Method),并结合图表对在不同阶段商务英语写作课程的教学过程中如何应用此教学模式作了概述。     

马克思与凯恩斯经济危机理论比较研究

马克思与凯恩斯的经济危机理论是两种经典的资本主义经济危机理论。马克思经济危机理论产生于自由竞争资本主义阶段,立足于资本主义社会发展规律,其任务是根除经济危机;而凯恩斯经济危机理论产生于垄断资本主义阶段,立足于资本主义经济发展的异常波动,任务在于熨平经济的周期性波动。马克思认为经济危机产生的原因是劳动者绝对贫困,实质是生产相对过剩,彻底消除经济危机的办法是生产关系变革;而凯恩斯认为经济危机产生的原因是消费倾向降低,实质是有限需求不足,治理经济危机的办法是刺激消费需求。相比较而言,马克思以资本主义社会整体发展规律为视角,把经济危机作为社会问题,理论视野更为宏阔;凯恩斯则以经济发展规律为视角,仅把经济危机视为经济问题,理论视野及适用范围相对局促,从而影响其理论的生命力。     

现代汉语强制性语义角色论析

从语法研究的一个平面来看 ,语义角色是名词性成分在句模结构中担当的角色 ,它主要由动词规定。语义角色是一个层次分明的体系 ,可逐层分级分类。根据它是否必须在句法结构中出现 ,分为强制性语义角色。其中强制性语义角色为十四个 ,非强制性语义成分为十一个 ,每种语义角色都有自己的句法、语义特点。     

甘肃东乡族刑事习惯法特征变迁的实证分析——以当代国家刑事立法进程为参照

采用数值模拟的方法建立三维模型,探讨在加预应力锚索情况下软弱面的剪切特性。通过改变锚索单元的参数,讨论软弱面变形特性以及剪切强度的变化规律。研究表明：在加预应力锚索后软弱面的剪切强度有所提高,并且加预应力锚索主要影响软弱面的粘聚力,而对内摩擦角的影响不大;当锚索倾角增大时,软弱面的粘聚力先增大而后减小。预应力锚索长度增加会导致软弱面粘聚力增大,但是存在一临界锚索长,当预应力锚索长大于此临界长度后,预应力锚索长对软弱面粘聚力的影响逐渐变小。在锚索无预应力情况下,软弱面的剪切应力位移曲线主要呈现出应变软化特性,在锚索有预应力情况下,则呈现出应变强化特性。