一种新型红外影像假目标的可行性分析

探讨一种利用CO2激光器生成新型红外影像假目标的方法,阐述了新型红外影像假目标的组成和基本工作原理,分析了利用CO2激光器生成新型红外影像假目标的可行性,为研制对抗红外成像侦察和制导的假目标提供了一种新的技术途径.     

Fairness-oriented routing algorithm joint with power control and channel assignment for multi-radio multi-channel wireless mesh networks

The multi-radio multi-channel wireless mesh network （MRMC-WMN） draws general attention because of its excellent throughput performance, robustness and relative low cost. The closed interactions among power control （PC）, channel assignment （CA） and routing is contributed to the performance of multi-radio multi-channel wireless mesh networks （MRMC-WMNs）. However, the joint PC, CA and routing （JPCR） design, desired to achieve a global optimization, was poor addressed. The authors present a routing algorithm joint with PC and CA （JPCRA） to seek the routing, power and channel scheme for each flow, which can improve the fairness performance. Firstly, considering available channels and power levels, the routing metric, called minimum flow rate, is designed based on the physical interference and Shannon channel models. The JPCRA is presented based on the genetic algorithm （GA） with simulated annealing to maximize the minimum flow rate, an non-deterministic polynomial-time hard （NP-Hard） problem. Simulations show the JPCRA obtains better fairness among different flows and higher network throughput.     

冲压焊接铝车毂用合金研究

在对冲压焊接铝合金车毂进行结构强度有限元分析的基础上 ,对Al-Zn -Mg系合金的热处理工艺及焊后性能进行了相关试验。试验结果表明 ,上述合金能满足冲压焊接铝合金车毂的使用要求。     

汽车尾气净化催化剂研究发展现状

汽车尾气排放问题越来越受到各国重视,概述了汽车尾气净化催化原理、催化剂组成以及催化剂的研究生产现状,并指出当前存在的问题及尾气净化催化剂的发展趋势。     

火工品闭气塞自动检测装置的研究

介绍一种用于火工品闭气塞检测的自动装置。利用图像处理技术和可编程逻辑控制器(PLC)控制技术实现了对工件的几何尺寸和表面缺陷的自动检测。详细介绍了该装置的检测原理、方法和实施途径。经对工件实际测试和结果分析表明：该装置能够显著地提高检测效率和加工质量,其分辨率可达到4μm。     

泵控马达调速系统中转速反馈信号的数字滤波

通过理论计算数字滤波器的等效噪声带宽,为泵控马达调速系统的电液伺服控制系统选取数字滤波器.试验表明:在采用常规PID控制算法,实施调速系统马达输出转速控制过程中,运用设置控制死区的数字滤波器,能显著提高调速系统马达输出转速的响应品质.     

车辆智能悬挂发展现状与研究思路探讨

在分析车辆各类智能悬挂系统实现方案及技术特点的基础上,提出了基于路面预瞄的电磁混合悬挂技术是未来车辆智能悬挂技术的发展方向与研究主线,而路面不平度预瞄技术-电磁混合悬挂技术-复合控制方法与高效算法是车辆智能悬挂走向实用必须克服的3个关键技术.     

Antiviral Warrior-APOBEC3G

This paper is to further understand how APOBEC3G can defend the retroviruses and to find new approaches to AIDs (acquired immure deficiency syndrome).The viral infectivity factor (Vif) induces rapid degradation of APOBEC3G by ubiquitination, which is a proteosome-dependent pathway. Precisely speaking, only in the virus-producing cell Vif expression is necessary; in its absence, infection of a subsequent target cell terminates at a postentry step through the action of the human APOBEC3G antiviral mechanism. Vif protein has two domains:one binds to APOBEC3G and the other regulates the degradation of APOBEC3G by a conserved sequence, SLQ (Y/F) LA motif. Recently, the research on Vif has also revealed APOBEC3G is a novel component of innate immune system. In fact, APOBEC3G not only acts in DNA editing to block the replication of retroviruses such as HIV-1, but also is able to defend a wide spectrum of distantly related retroviruses and interferes with HBV through a different mechanism from HIV.     

一种新型光放大器

掺铒光纤放大器(EDFA)是WDM光通信网络最关键技术之一,它对光信号传榆的距离和信号传输的完整性起着决定性的作用.文章对EDFA的发展作了一定的阐述,主要介绍一种新型EDFA的设计理念、控制策略的选定、功能的实现情况以及电路和软件的设计情况,它是一种具备动态均衡调节功能和监测功能的新型光放大器.     

可燃气体数字显示探头设计

设计一种可燃气体数字显示探头,介绍了数字显示探头的工作原理及其软、硬件的设计。显示探头的探测器由TGS842半导体金属氧化物可燃气体传感器构成,配以OP07放大器对检测信号进行放大,利用高精度的数字电位器根据不同环境对零点、量程做相应的调整,并用TLC549实现A/D转换把数字信号传送给AT89C51微控器,从而实现可燃气体浓度的实时显示和声光报警。再由XTR105芯片把标准的4～20 mA电流信号传送给中央控制系统,同时用软件对信号进行滤波、报警处理。