冰箱化霜温控开关温度特性全自动测试台

本文介绍了自行研制的冰箱化霜温控开关温度特性全自动测试合，它每次检测数可达１００只，工作槽温度场均匀性在±０．１℃以内，控温精度达±０２℃．文中对其设计原理、系统流程及控制系统等作了详细描述．     

赛事报道中的隐喻及其词法手段

本文对比考察了传统隐喻观与认知语言学的隐喻观 ,重点评述了隐喻的本质、定义、两概念及其判别标准。在此基础上 ,运用相关语料分析了赛事报道中使用的各类隐喻的词法手段。根据词法构成特点 ,将隐喻实例粗分为两大类 ,即名词性隐喻和动词性隐喻 ,同时分析了“本体隐喻”和“常规隐喻”的特点。本文得出的初步结论是 :赛事报道中的隐喻无所不在 ,其词法手段灵活多样 ,这进一步证明了认知语言学者所提出的“隐喻是人类语言无所不在的原则”这一全新隐喻观的正确性     

教育创新:主体性教育与教育信息化的协同建构

"创新"是教育实践生命的源头.教育信息化为教育创新提供了前所未有的契机和条件;而主体性教育则为创新教育指示了方向,为教育信息化提出了内在的需求和动力.主体性教育与教育信息化交汇在此世纪之交有着教育发展规律的内在必然性,二者的协同建构将在人类教育创新史上产生一次巨大的质的飞跃.     

空气流化棒助流装置的研究

为了消除料仓内结拱、堵塞等不正常现象,提出了空气流化棒助流装置的设计方案.空气流化棒能够有效地克服料仓内异常料流现象.在流化风作用下的料仓内水泥流动的研究表明当下料口径(D)与料仓直径(D1)之比大于0.08而小于0.13时,物料流量与下料口径呈二次抛物线的关系;当D/D1大于0.13时,物料流量基本不随下料口径的变化而变化;当下料口径一定时,物料流量基本不随物料高度的变化而变化.     

Admissible minimum bias estimation of response surfaces

The minimum bias estimator was introduced as an alternative to the least squares estimator for approximating response functions by low-order polynomials. Here we show how to obtain an admissible estimator with smaller squared bias.     

Practical Maximum Pseudolikelihood for Spatial Point Patterns(with Discussion)

This paper describes a technique for computing approximate maximum pseudolikelihood estimates of the parameters of a spatial point process. The method is an extension of Berman & Turner's (1992) device for maximizing the likelihoods of inhomogeneous spatial Poisson processes. For a very wide class of spatial point process models the likelihood is intractable, while the pseudolikelihood is known explicitly, except for the computation of an integral over the sampling region. Approximation of this integral by a finite sum in a special way yields an approximate pseudolikelihood which is formally equivalent to the (weighted) likelihood of a loglinear model with Poisson responses. This can be maximized using standard statistical software for generalized linear or additive models, provided the conditional intensity of the process takes an 'exponential family' form. Using this approach a wide variety of spatial point process models of Gibbs type can be fitted rapidly, incorporating spatial trends, interaction between points, dependence on spatial covariates, and mark information.     

Non‐parametric Threshold Estimation for Models with Stochastic Diffusion Coefficient and Jumps

Abstract. We consider a stochastic process driven by diffusions and jumps. Given a discrete record of observations, we devise a technique for identifying the times when jumps larger than a suitably defined threshold occurred. This allows us to determine a consistent non‐parametric estimator of the integrated volatility when the infinite activity jump component is Lévy. Jump size estimation and central limit results are proved in the case of finite activity jumps. Some simulations illustrate the applicability of the methodology in finite samples and its superiority on the multipower variations especially when it is not possible to use high frequency data.     

ispLSI器件测试板的研制

介绍了MODEL－IE1型ISP和EDA测试板的结构原理及其电路，说明该测试电路的使用方法。     

保护接地与接零的几个问题

介绍接地与接零的概念、接地的种类和作用、保护接地与接零的基本原理、Ｎ线和ＰＥ线的区别等个问题。     

高速SOI-LIGBT的数值分析

研制出Ｈｅ离子注入局域寿命控制ＳＯＩ横向绝缘栅双极晶体管（ＳＯＩ－ＬＩＧＢＴ），有效地提高了器件的关断速度，且与集成电路工艺相兼容。数值模拟表明，该器件的t_f～V_F折衷关系优于采用非局域寿命控制的器件，在相同关断速度下其正向压降可降低０．６～１．４ Ｖ，避免了阳极短路结构的正向快速返回现象。