IBM—PC数字示波器扩充插卡及其驱动程序设计

本文介绍一种扩充 IBM PC 个人计算机及其兼容机,使其具有数字示波能力的插卡硬件和驱动软件设计.本插卡及其以8088汇编语言和 Turbo Pascal 语言编写的驱动程序,在保留IBM PC 原有功能的前提下。利用了 IBM PC 原有的软硬件资源,共同构成一种具有存贮示波功能的个人仪器.     

双参数指数分布异常数据T型检验统计量的精确分布和检验效率

针对双参数指数分布样本中出现的多个异常大数据提出的T型检验统计量，推导出了其概率密度函数的精确表达式，利用该结果可以得到T型检验统计量的临界值．进一步讨论了该统计量的检验效率，表明利用T型检验可以避免Masking效应。     

Poisson过程的可靠性增长模型(Ⅲ)——评定与预测

本文提出了两个新模型。基于定数和定时截尾试验数据,用最小二乘方法和极大似然方法,研究了在第i阶段失效时间遵从强度(或均值率)为λ_i的Poisson过程的可修系统的可靠性评定与预测问题。这些结果能用于单参数指数分布的无替换(或有替换)定数(或定时)截尾试验的情况。     

棉纤维长度测试取样研究

在理想的截面取样理论基础上，进一步研究了具有一定宽度的取样夹持器以一定角度从“理想棉条”中取样时试样的理论分布及照影机曲线，并结合实验分析了取样影响因素；根据研究结果得出了棉纤维长度测试的取样要求，为取样器的进一步开发提供了参考。     

卷染机的自动齐边装置的设计

提出一种应用于印染行业卷染机的自动齐边装置．利用对置式气电传感器．将位移量转换成电量信号．从而使执行机构带动卷布辊在规定的范围内自动对边，使织物经过卷染过程后色泽均匀，没有边中色差。该装置在造纸和建材行业也有应用意义。     

Asymmetries in conditional mean and variance: modelling stock returns by asMA‐asQGARCH

We propose a nonlinear time series model where both the conditional mean and the conditional variance are asymmetric functions of past information. The model is particularly useful for analysing financial time series where it has been noted that there is an asymmetric impact of good news and bad news on volatility (risk) transmission. We introduce a coherent framework for testing asymmetries in the conditional mean and the conditional variance, separately or jointly. To this end we derive both a Wald and a Lagrange multiplier test. Some of the new asymmetric model's moment properties are investigated. Detailed empirical results are given for the daily returns of the composite index of the New York Stock Exchange. There is strong evidence of asymmetry in both the conditional mean and the conditional variance functions. In a genuine out‐of‐sample forecasting experiment the performance of the best fitted asymmetric model, having asymmetries in both conditional mean and conditional variance, is compared with an asymmetric model for the conditional mean, and with no‐change forecasts. This is done both in terms of conditional mean forecasting as well as in terms of risk forecasting. Finally, the paper presents some evidence of asymmetries in the index stock returns of the Group of Seven (G7) industrialized countries. Copyright © 2004 John Wiley & Sons, Ltd.     

我国消费函数形式的计量经济分析

该文在分析4种不同假说的消费函数理论基础上，采用中国的统计资料，试图分析适合我国的消费函数形式。     

多传感器一致性数据融合方法的改进与推广

为了提高集中式多传感器一致性数据融合方法的精度和速度 ,利用多元正态分布的统计假设检验和统计推断理论 ,详细地分析了现有多传感器一致性数据融合方法存在的缺点 ,提出了一种新的置信距离用以度量不同传感器测量数据之间的距离 ,讨论了它的性质 ,并因此建立了新的融合算法。计算机仿真结果表明 ,算法优于现有的多传感器一致性数据融合方法 ,并且可以很容易地推广到多维数据情形中。     

A New Deghosting Algorithm with Hypothesis Testing Data Fusion

1 .INTRODUCTIONInrecentyears,themultisensordistributeddatafu sionhasattractedmuchattention[5] .Oneoftheim portantaspectsispassivecrosslocation[2 ] .Themea surementfromarealtargetisatrueLOS (line of sight)angleplussomemeasurementnoise.Torrieri[1 ] proposedthebasicmethodsofestimationanddeterminedtheaccuracyofasuitableestimator.However,theLOSmeasurementsofmultipletargetsoccurringinthesameplanewouldcreateanumberoffalseintersec tions ( ghosts) .Eliminatingthefalseintersectingpoints(deghosti…