Dual channel detection–diode array and mass spectroscopy (El or Cl)–in HPLC

Simultaneous recording of UV and mass spectra (electron impact or chemical Ionization) in conventional HPLC is described. The LC eluent is divided into two parts; one is directed into a diode array detector and the other is introduced into the mass spectrometer via a particle beam interface. The analysis of the steroid esters of a pharmaceutical formulation illustrates the possibilities of dual channel (DAD-MS) HPLC detection.     

深亚微米pMOS器件HCI退化建模与仿真方法

研究了深亚微米pMOS器件HCI(hot carrier injeotion)退化模型.采用流函数分析方法提出一种时变栅电流物理描述,基于这一栅电流模型改进了pMOS器件的HCI退化模型,并在该模型基础上提出一种HCI退化可靠性仿真方法,用于对静态应力条件下器件的HCI退化程度进行预测.最后给出了仿真结果对比.该方法已被用于XDRT可靠性工具中进行器件HCI退化分析.     

最佳通用逻辑门ULG.2 的应用研究

本文在作者以前研究的基础上,进一步研究最佳通用逻辑门ULG.2的应用,提出了用ULG.2组成的一些脉冲电路。     

On the state of strength‐three covering arrays

A covering array of size N, strength t, degree k, and order υ is a k × N array on υ symbols in which every t × N subarray contains every possible t × 1 column at least once. We present explicit constructions, constructive upper bounds on the size of various covering arrays, and compare our results with those of a commercial product. Applications of covering arrays include software testing, drug screening, and data compression. © 2002 Wiley Periodicals, Inc. J Combin Designs 10: 217–238, 2002; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/jcd.10002     

栅对准误差对双栅MO SFET 性能影响的分析

对栅MOSFET是一种非常有发展前途的新型器件，它具有跨导高、亚阈值特性优异、短沟道特性好等优点，但是目前自对准的双栅MOSFET的工艺制作相当困难。本文中分析了双栅MOSFET的正、背面栅存在对准误差时，对器件的表态及动态特性的影响，并提出了一种改善这种影响的方法。     

The Uniformly 3-Homogeneous Subsets of PGL(2, q)

We use the character-table of PGL(2, q) to determine the subsets of that group acting uniformly 3-homogeneously on the projective line.     

Random Probability Measures with Given Mean and Variance

This article describes several natural methods of constructing random probability measures with prescribed mean and variance, and focuses mainly on a technique which constructs a sequence of simple (purely discrete, finite number of atoms) distributions with the prescribed mean and with variances which increase to the desired variance. Basic properties of the construction are established, including conditions guaranteeing full support of the generated measures, and conditions guaranteeing that the final measure is discrete. Finally, applications of the construction method to optimization problems such as Plackett's Problem are mentioned, and to experimental determination of average-optimal solutions of certain control problems.     

稀布阵综合脉冲孔径雷达的研究与试验

稀布阵综合脉冲孔径雷达是一种先进的米波雷达。本文介绍了其基本概念、几个研究问题和一些试验结果。     

8～12GHz低噪声PHEMT单片集成电路

描述了以ＰＨＥＭＴ为有源器件的８～１２ＧＨｚ宽带低噪声单片电路的设计及制造，获得了满意的结果。其性能为ｆ＝８～１２ＧＨｚ，Ｇａ＝１７．４～１９．５ｄＢ，Ｆｎ＝１．８４～２．２０ｄＢ；ｆ＝８～１４ＧＨｚ，Ｇａ＝１７．４～１９．９ｄＢ，Ｆｎ＝１．８４～２．５ｄＢ     

移动通信中的CMA阵列抗干扰性能分析

移动通信中的CMA阵列具有抗多径干扰和抗共信道干扰能力。本文理论分析了实际信号环境下CMA阵列的抗多径干扰和抗共道干扰能力，并进行了计算机仿真，仿真结果表明，CMA阵列的抗多径干扰性能受随机相移、信号幅度、信号空间分布等因素的影响，当所需信号与多径干扰信号空间卫离度越大，CMA阵列的抗多径干扰性能越好。CMA阵列的抗共信道干扰性能较抗多径干扰性能要好，只要所需用户信号和共信道干扰信号不在同一入射方向，CMA阵列就可以将干扰信号抑制掉。