用于1553总线控制器的存储管理单元设计

从消息队列的数据存储结构定义、存储空间规划和控制过程设计三方面讨论了MIL-STD-1553/1773总线控制器的设计实现。在总线控制器的模块化设计方案中,这三个方面构成了总线控制器的核心模块棗存储管理单元,应用该方案可实现具有多消息自动处理功能的总线控制器。     

论西部开发中区域货币金融政策的选择

西部经济发展落后的重要原因之一在于资金的短缺.要发展西部经济,缩小东西部差距,有必要制定区域(差别)货币金融政策,包括差别再贷款权政策、差别存款准备金率和贴现率政策、差别利率政策以及在西部开发中试行资本项目可兑换政策和积极培育西部资本市场,发展区域金融中心等.     

TESTING SPHERICITY UNDER A MIXTURE MODEL

The robustness of Mauchly's sphericity test criterion when sampling from a mixture of two multivariate normal distributions is studied. The distribution of the sphericity test criterion when the sample covariance matrix has a non-central Wishart density of rank one is derived in terms of Meijer's G-functions; its distribution under the mixture model is then deduced. The robustness is studied by computing actual significance levels of the test under the mixture model using the critical values under the usual normal model.     

南瓜营养液的生产技术

介绍了南瓜营养液的生产工艺和动物实验效果。     

现象学的问题如何发生--德里达对胡塞尔发生现象学的解读

德里达对胡塞尔的发生现象学有他自己的特殊理解,他研究了观念的历史,以及根据所形成的心理习惯构成的观念,当然,这也是观念对象构成的历史过程。发生是一个陌生的过程:在即将来临的历史中包含着一种中断。德里达描述了从某种确定的目的论返回到胡塞尔所新近确立的起源问题的运动结构。德里达研究稳定的结构与发生现象学之间的关系,在这个过程中,德里达提出了关于解构的基本问题。     

Creating a reference to a complex emergency situation using time series methods: war in Guinea-Bissau 1998-1999

Impacts of complex emergencies or relief interventions have often been evaluated by absolute mortality compared to international standardized mortality rates. A better evaluation would be to compare with local baseline mortality of the affected populations. A projection of population-based survival data into time of emergency or intervention based on information from before the emergency may create a local baseline reference. We find a log-transformed Gaussian time series model where standard errors of the estimated rates are included in the variance to have the best forecasting capacity. However, if time-at-risk during the forecasted period is known then forecasting might be done using a Poisson time series model with overdispersion. Whatever, the standard error of the estimated rates must be included in the variance of the model either in an additive form in a Gaussian model or in a multiplicative form by overdispersion in a Poisson model. Data on which the forecasting is based must be modelled carefully concerning not only calendar-time trends but also periods with excessive frequency of events (epidemics) and seasonal variations to eliminate residual autocorrelation and to make a proper reference for comparison, reflecting changes over time during the emergency. Hence, when modelled properly it is possible to predict a reference to an emergency-affected population based on local conditions. We predicted childhood mortality during the war in Guinea-Bissau 1998-1999. We found an increased mortality in the first half-year of the war and a mortality corresponding to the expected one in the last half-year of the war.     

学术期刊属性研究

在编辑传播学界关于学术期刊属性的研究上,普遍存在着一个突出的问题,这就是论者们几乎不假思索地认为“学术期刊是商品”。我们认为,这是一个很大的误区,这种认识在理论上是错误的,在实践上是有害的。首先,“学术期刊商品论”是自相矛盾的;其次,“学术期刊商品论”与马克思主义经济学是相悖的;再次,“学术期刊商品论”与普遍存在的事实是恰恰相反的。学术期刊和学术事业是一项创新的事业,它关系一个国家的生存安危,对此,江泽民同志曾经反复强调,创新是一个民族进步的灵魂,是国家兴旺发达的不竭动力之源。因此,对待学术和学术期刊事业应当像对待军队、警察机构一样,不能也不可能使其商品化,学术期刊应该走自己的健康发展之路。     

从《老人》看凯瑟琳·安·波特的叙述艺术

凯瑟琳.安.波特的中篇小说《老人》在时间结构、叙述视角以及人物话语几个方面紧紧围绕米兰达对艾米姑妈的悲剧故事的了解过程这一主线展开。通过这些叙事策略进一步深化了小说的主题。     

中国始炼硫化汞时间新证

中国始炼硫化汞的时间问题,因其关涉到“人类第一次用自己的劳动得到了实质上与天然产物无二的成果”,而引起科技史家的极大关注,但因缺乏确凿资料,以至该问题一直悬而未决。事实上,此前学界认为道士升炼硫化汞的时间大略始于隋代的观点是值得商榷的。仅以《道藏》所载炼丹文献为例,即可粗举数例隋代以前与升炼硫化汞相关的资料。进一步的考证说明,中国古代道士早在南北朝或晋代甚至汉代,就已经能够用人工的方法升炼硫化汞了。     

数控机床功能的扩展

本文主要分析了HEIDENHAIN TNC 310数控铣床系统中圆弧铣削指令及螺纹铣削指令,对螺纹铣削功能进行延伸,扩展到圆弧三轴联动,并对螺纹铣削指令格式进行了修改,从而具有圆弧三轴联动铣削功能。