微机化视频图形发生仪的研制

介绍了以单片机和ＣＲＴ显示器控制芯片ＣＲＴＣ为主的微机化视频图形发生仪的设计方法及原理．对用ＭＣ６８４５ＣＲＴＣ产生视频信号的方法及图象分辨率作了详细介绍，给出了将此视频图象发生仪作图象刺激仪的软件框图．     

阵列信号单信道处理技术

阵列信号处理已广泛应用于许多电子系统中，如微波无源比幅测向系统等，但通道间的振幅和相位的不平衡常常引起较大的测向误差。为了匹配通道间的振幅和相位平衡，可利用卫星通信中的多址联接技术（如ＦＤＭＡ、ＴＤＭＡ或ＣＤＭＡ）构成单信道处理系统来代替多信道系统。文中详细地研究了ＣＤＭＡ单信道系统，建立了系统模型，分析了系统特性，模拟结果证明了这种单信道理论和技术的可行性。     

一种瞬变步长LMS自适应滤波算法

基于规一化起动、平滑递推和ＰＬＳ算法导出了一种新的变步长ＬＭＳ算法。文中分析了起动后的平稳连接和提高起始收敛速度的条件，证明了步长因子μ（ｋ）的瞬变特性及其对减小失调噪声的作用。计算机仿真效果较好，支持了理论分析。     

一种实用自适应PID控制器

本文介绍了一种实用自适应PID控制器,它是以MCS-51系列单片微机为核心,采用PID控制规律结合参数辨识的控制算法,实现了PID参数完全在线自动整定。该控制器适用于被控制对象未知或慢时变的场合,既可替代常规PID控制器,也可作为分布式系统的低级智能控制器。     

N进制计数器的一种设计方法

通过对计数器工作原理及组成的分析,提出N进制计数器的一种设计方法。运用本文提出的方法,我们可对N进制计数器进行快速设计,并且思路固定。使N进制计数器的设计变得有规律可循。     

HDTV信源编码中的自适应处理

在序列图像编码中，自适应性是提高图像主观质量的一个关键，自适应处理方法一般是窈门（ｋｎｏｗ－ｈｏｗ）的形式出现，它是从编码的实践中获得的。讨论了人的视觉特性及如何将它用于对ＤＣＴ系数的量化，以改善ＨＤＴＶ序列解码象的主观质量。实验表明，文中所述方法的解码图像的主观质量比作者在文献［１］中报告的有明显改善。     

Irregular Identification,Support Conditions,and Inverse Weight Estimation

In weighted moment condition models, we show a subtle link between identification and estimability that limits the practical usefulness of estimators based on these models. In particular, if it is necessary for (point) identification that the weights take arbitrarily large values, then the parameter of interest, though point identified, cannot be estimated at the regular (parametric) rate and is said to be irregularly identified. This rate depends on relative tail conditions and can be as slow in some examples as n^−1/4. This nonstandard rate of convergence can lead to numerical instability and/or large standard errors. We examine two weighted model examples: (i) the binary response model under mean restriction introduced by Lewbel (1997) and further generalized to cover endogeneity and selection, where the estimator in this class of models is weighted by the density of a special regressor, and (ii) the treatment effect model under exogenous selection (Rosenbaum and Rubin (1983)), where the resulting estimator of the average treatment effect is one that is weighted by a variant of the propensity score. Without strong relative support conditions, these models, similar to well known “identified at infinity” models, lead to estimators that converge at slower than parametric rate, since essentially, to ensure point identification, one requires some variables to take values on sets with arbitrarily small probabilities, or thin sets. For the two models above, we derive some rates of convergence and propose that one conducts inference using rate adaptive procedures that are analogous to Andrews and Schafgans (1998) for the sample selection model.     

优化TOPSIS模型在木材加工企业的评价应用——基于SCM视角

考虑到林产品经销商在参与木材加工企业构建供应链时需选取其作为上游合作伙伴,构建包括竞争力、绿色行为、质量、成本和交货期5个一级指标及其14个二级指标的评价指标体系,运用TOPSIS优化改进模型,结合模糊数学评价木材加工企业,最后通过案例证实该评价指标体系的可行性,为林产品经销商提供参考借鉴。     

二语作格动词语义加工中的身物交互效应

This article investigates the theoretical basis and feasibility in the processing of English ergative verbs from the perspective of body-object interaction effects (BOI). It analyzes the motor degree of different verbs, probing into the semantic features and syntactic behaviors of ergative verbs. It also explores the relationships between the BOI effects and different type of verbs in semantic processing, examining the motor prominence of English ergative verbs, as well as analyzing the factors that cause the misusage of English ergative verbs in the second language processing. Further empirical research is needed to verify the BOI effects’ restrictive elements in the processing of English ergative verbs.