高功率激光焊接光致等离子体的检测

系统地归纳了高功率激光焊接过程中光致等离子体的声、光、电、热等四种特征信号，综述了国外在等离子体信号检测方面的试验方法及研究进展，分析了未来的发展趋势     

活动标形及其在点啮合齿轮传动误差分析中的应用

活动标形法的论述首推苏步青译，佐佐木重夫著《微分几何学》，还有的著作从外微分形式引入活动标形,本文论证取曲面的正交曲率网为参数网时，曲面论的基本公式就是活动标形的微分形式，并用其分析了点啮合齿轮传动误差．     

Light-Gradient-Induced Spiral Wave Drifts in a Belousov-Zhabotinsky Reaction

The dynamic behaviour of spiral tip in the light-sensitive Belousov-Zhabotinsky reaction under the influence of an externally applied light gradient was experimentally studied. The gradient causes different drifts for different spiral patterns. The centre of the spiral wave moved toward the region of lower light intensity. The direction of an additional perpendicular drift depended on the chirality of the spiral wave. The dependences of the drifting angle and the drifting velocity on light gradient have been measured.     

IEEE802．11g协议中一些问题的分析与研究

本文简要介绍了IEEE802．11协议族标准的发展过程，重点分析了IEEE802．11g协议标准。对IEEE802．11g协议中可能出现的一些问题进行分析和研究，并针对这些问题给出了相应的解决方法。     

Bistable Behaviour of N Two-Level Atoms Interacting with the Field inside a High-Q Cavity Containing a Nonlinear Kerr-Like Medium

Taking the intensity-dependent coupling between atoms and cavity mode into account, we investigate a system consisting of N homogeneously broadened two-level atoms interacting with the field inside a single-mode Fabry- Perot cavity containing a nonlinear Kerr-like medium. We derive the steady-state bistable behaviour of the system, and further analyse in details the influence of several critical parameters on the bistable behaviour.     

实数域波达方向估计算法及其神经网络实现

针对基于特征分解的高分辨率波达方向（DOA）估计方法中所存在的计算量庞大的问题，本文讨论了一种实时实现DOA估计的有效途径．本文包括两方面的研究工作：（1）提出了在实效域实现高分辨率波达方向估计的有效算法．其最大的特点是输入信号和特征向量都是实的．（2）讨论了更适合于主分量提取的神经网络及算法.     

带有块间串扰MC-CDMA的时域信道估计和多用户检测

本文把带有IBI的MC-CDMA系统等效解释为特殊的直接序列码分多址（DS-CDMA）系统，并给出了相应的时域信道估计方法和时域线性最小均方误差（MMSE）多用户检测方法。仿真实验表明了本文方法的性能。     

图文并茂 直接了当──用户传真(FAX)业务简介

图文并茂　直接了当──用户传真（ＦＡＸ）业务简介业宣用户传真业务是在电话机上加装符合邮电部入网要求和标志规定的三类传真机，并通过ＩＤＤ、ＤＤＤ或人工挂发长途的方式，使用户与用户间连通．传送各种文昨日表和资料。传真业务按传送内容分为真迹传真、相片传真、...     

Pseudo-Spin-Valve Trilayer Using Amorphous CoNbZr Layer： Giant Magnetoresistance, Domain Structures and Potentials for Spin-Electronic Devices

We propose a pseudo-spin-valve (PSV) trilayer using amorphous CoNbZr Mloy for soft magnetic layers. The giant magnetoresistance (GMR), domain structures and their variation upon thermal annealing are investigated. The GMR effect is not only stable up to 300℃ but also enhanced due to the improvement of the interfaces between Cu and magnetic layers. With high annealing temperature, the magnetoresistance (MR) ratio decreases rapidly as a result of serious layer interdiffusion. Dense stripe domains, which disappear after annealing at 300℃ for 1h, are observed in the sandwiched films. It is found that after patterning to elliptic stripe with aspect ratio of 6:1, the trilayers have a single domain and their MR ratio increases. The dynamic MR behaviour under an ac magnetic field indicates that the patterned stripes have good linear MR responses. Therefore, it is believed that the CoNbZr/Cu/Co PSV trilayers have strong potentials for spin-electronic devices including magnetic random access memory.     

奶粉生产过程微机控制系统

本文阐述了微机在国产中小型奶粉加工设备上的成功应用。分别介绍了系统对控制对双效浓缩、喷雾干燥这两个工序的实施方法。同时对控制系统的技术关键：奶浓度在线测量，高压泵的在线控制也作了介绍，对乳品厂的设备改造具有实际的意义。