极化态n—p散射

n—p散射是研究核力的重要实验,它间接地证明了核力与电荷无关。本文着重探讨极化态下n—p散射的四种情形,得出微分截面公式,计算自旋反转截面及几率。最后导出非极化态n—P散射的相关结论。     

有穷转向的ω前后文无关语言

本文以终止状态接受定义了k 次转向的PDA 以及k 次转向的CFL,讨论了它们和S.Ginsburg 以空存储接受定义的2k-1次转向的PDA 以及2k-1次转向的CFL 之间的关系,给出了k 次转向的PDA 以及相应语言的一些性质.对于ω输入的情况,定义了以状态重复集接受和以空存储接受的有穷转向的ω—PDA以及相应的ω—CFL,证明了这两种接受方式识别同一语言类,并给出了有穷转向的ω—CFL 的若干性质.     

Identification of a pre-hibernating state in myocardium from nonhibernating chipmunks

Summary During the hibermating season, the amplitude of the cardiac action potential plateau of nonhibernating chipmunks was reduced. Replacing external Ca by Sr inhibited the electromechanical responses of these preparations. Similar properties were observed in hibernating animal preparations, suggesting that changes in cardiac function are already triggered before hibernation begins.15 December 1986     

哈尔滨市区马家沟河水中氰化物的調查与評价

文章对哈尔滨市马家沟河采用异烟酸吡唑啉比色法测试在丰水期(1987年5月)和枯水期(1987年10月)河水中氰化物含量并测定了河水的水温、pH值,进而评价和讨论了马家沟河水中氰化物的存在形式、氰化物在河水中的水解反应、生化氧化分解过程以及河水中氰化物与重金属离子作用生成氰化络合物的反应机理。文章在最后提出哈尔滨市马家沟河水中氰化物存在的潜在危害,这为保护哈尔滨市松花江河流环境提供了科学依据。     

A unified view of statistical forecasting procedures

A large number of statistical forecasting procedures for univariate time series have been proposed in the literature. These range from simple methods, such as the exponentially weighted moving average, to more complex procedures such as Box–Jenkins ARIMA modelling and Harrison–Stevens Bayesian forecasting. This paper sets out to show the relationship between these various procedures by adopting a framework in which a time series model is viewed in terms of trend, seasonal and irregular components. The framework is then extended to cover models with explanatory variables. From the technical point of view the Kalman filter plays an important role in allowing an integrated treatment of these topics.     

一种基于语言值多数的变权综合决策方法

采用模糊集理论和变权原理研究基于语言值多数的多因素决策问题．将“令人满意因素”和“大多数”等语言信息视为模糊集,利用语言值量化算子计算各因素的满意度和各方案关于模糊大多数的隶属度,由此构造激励型和惩罚型状态变权向量以实现权重在因素之间的转移,使因素的权重主要集中在令人满意因素上并且按决策问题的需要进行某种均衡分配,最终构建模糊决策模型．     

再论公法法治观

“国家与社会”的二元分析框架具有不可克服的内在局限性。一味强调市民社会自治、轻视国家在建构法治中的作用,实际上是对市民社会理论的误解。主张市民社会与国家互补的治理理论并不能否定国家的主导作用。强调国家的作用并提倡一种公法法治观,是当务之急。     

《训门人》篇中的疑问代词

《训门人》使用了七类疑问代词：人物疑问代词、事物疑问代词、方式情状疑问代词、原因目的疑问代词、处所疑问代词、时间疑问代词和数量疑问代词.《训门人》疑问代词层次丰富,呈现出疑问代词从近代向现代过渡的趋势.     

Multifunctional interneurons in behavioral circuits of the medicinal leech

Summary We are using the medicinal leech to study the neuronal basis of behavioral choice. In particular, we are recording from neurons, both extracellularly and intracellularly, in preparations that can express three different behaviors: the shortening reflex, crawling and swimming. We have found that particular mechanosensory neurons can elicit any of the behaviors, and that the movements are produced by just four sets of muscles, each controlled by a small number of motor neurons. Hence, there must be three different pattern-generating neuronal circuits, each of which can be activated by the same set of sensory neurons. We are studying how the choice is made among the three behaviors by recording, while one behavior is being performed, from neurons known to be involved in the initiation of the other two. We have found that an interneuron, cell 204, which is known to initiate and maintain swimming, is also active during shortening and crawling. The activity level in this interneuron can influence whether a mechanosensory stimulus produces shortening or swimming. The neuronal mechanisms by which this choice is normally effected awaits further elucidation of the circuits that elicit and generate shortening and crawling.     

Logistic生产函数

在对经典Cobb-Douglass生产函数讨论的基础上,根据实际经济运行,给出了一个新的生产函数——Logistic生产函数,研究了新生产函数的性质,并应用动力系统理论对其进行了动态分析,导出了此经济系统的多重定态,得出经济发展具有阶段性的结论.还分析了技术进步和教育在系统演化中的作用.