无线通信的跨层优化

传统的OSI分层结构无法适应无线网络环境，随着越来越多无线应用的出现，人们提出了跨层设计，其主要内容就是通过在协议栈的各层之间（主要是应用层、传输层、网络层、链路层和物理层）传递特定的信息，使协议栈能够根据无线环境的变化来实现对资源的自适应优化配置，从而更有效的利用无线网络资源，提高系统的性能。     

GPRS技术在SCADA系统中的实现与应用

GPRS是一种构建于GSM移动网络之上的通信新技术，可以提供中低速率的数据通信能力，本文介绍了GPRS的技术规范和特点，并提出了该技术在SCADA(即数据采集与监视控制)系统中的应用，给出相应的系统结构与软硬件设计要点，说明了其广泛的应用领域与前景。     

炼油厂深水井计算机集中监控系统的应用

针对炼油企业供水系统存在问题,阐述了炼油厂分散型水源井智能化集中监控的技术方案.对监控系统的硬件结构、程序设计、功能、技术特点和可靠性设计进行了较详细的介绍.     

无皂型乳液聚合的研究进展

综述了无皂型乳液聚合反应机理及影响乳液稳定性的因素。对无皂型乳液聚合制备方法进行了论述，并介绍了无皂型乳液聚合的研究动态、应用和发展前景。     

电站隧洞岩爆岩石的微观破坏力学机制分析

分析总结西南某电站辅助隧洞的岩爆发育特征,然后用扫描电镜技术(SEM)对岩爆岩石断口进行微观断裂形貌研究,并总结其破坏力学机制,最终建立起岩爆岩石的微观断裂方式和破坏力学机制与宏观岩爆特征及其烈度的关系。     

Fast Positive Feedback Between the Adrenocortical Stress Response and a Brain Mechanism Involved in Aggressive Behavior.

Aggressive behavior induces an adrenocortical stress response, and sudden stressors often precipitate violent behavior. Experiments in rats revealed a fast, mutual, positive feedback between the adrenocortical stress response and a brain mechanism controlling aggression. Stimulation of the aggressive area in the hypothalamus rapidly activated the adrenocortical response, even in the absence of an opponent and fighting. Hypothalamic aggression, in turn, was rapidly facilitated by a corticosterone injection in rats in which the natural adrenocortical stress response was prevented by adrenalectomy. The rapidity of both effects points to a fast, mutual, positive feedback of the controlling mechanisms within the time frame of a single conflict. Such a mutual facilitation may contribute to the precipitation and escalation of violent behavior under stressful conditions. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

HART通信协议在汽油机速度测量和监控方面的应用

首先介绍了HART通信协议及他的优点，然后介绍了HART通信协议在汽油机测速方面的软件实现。该软件主要采用目前流行的VB编程语言。可设计出界面友好、功能强大的测量和监控软件。     

全光网中的光信噪比估算与系统设计

指出了WDM光传送网中 ,级联光上下路节点或光交叉连接节点后 ,系统构成上与传统级联线路放大器情况下的差异以及常用光信噪比评估公式的近似性。对WDM光传送网中线路给出了一个等效模型 ,并详细推导了光信噪比的计算公式 ,同时计入了光放大器的自发辐射噪声引起的饱和效应。最后针对不同系统配置情况进行了光信噪比的估算 ,分析了估算结果及其对线路设计的指导意义     

Wireless video streaming with TCP and simultaneous MAC packet transmission (SMPT)

Video streaming is expected to account for a large portion of the traffic in future networks, including wireless networks. It is widely accepted that the user datagram protocol (UDP) is the preferred transport protocol for video streaming and that the transmission control protocol (TCP) is unsuitable for streaming. The widespread use of UDP, however, has a number of drawbacks, such as unfairness and possible congestion collapse, which are avoided by TCP. In this paper we investigate the use of TCP as the transport layer protocol for streaming video in a multi‐code CDMA cellular wireless system. Our approach is to stabilize the TCP throughput over the wireless links by employing a recently developed simultaneous MAC packet transmission (SMPT) approach at the link layer. We study the capacity, i.e. the number of customers per cell, and the quality of service for streaming video in the uplink direction. Our extensive simulations indicate that streaming over TCP in conjunction with SMPT gives good performance for video encoded in a closed loop, i.e. with rate control. We have also found that TCP is unsuitable (even in conjunction with SMPT) for streaming the more variable open‐loop encoded video. Copyright © 2004 John Wiley & Sons, Ltd.     

一种基于混沌渐近同步的数字保密通信方法

根据驱动－响应混沌同步原理，提出了一种基于混沌渐近同步的数字保密通信方法。通过设计对发射信号进行多级单值非线性变换，使得通过预测法的攻击完全失效，因而这种通信方法具有较高的抗破译能力。理论分析和数值模拟结果证实了本方法的正确性与有效性。