室内多载波CDMA系统在深度衰落环境下的能量受控均衡策略

多载波CDMA(MC-CDMA)是将多载波调制OFDM与DS-CDMA结合起来的多址访问技术。如何从接收到的信号恢复出发送信号，涉及到频率分集接收和均衡。本文提出的能量受控均衡技术，在多用户的环境下能较好地恢复扩频码的正交性且避免信道深度衰落的影响，而且，实验表明该方法对于不同的信道状况均能很好适应。     

An ultra-wideband 6–14 GHz frequency modulated continuous wave primary radar with 3 cm range resolution

This paper describes the design and verification of an ultra-wideband 6–14 GHz frequency modulated continuous wave (FMCW) primary radar system with very high range resolution. The design and measurement results of the utilized signal generator and receiver are presented. The signal generator features a 86% relative continuous tuning range and average phase noise of −106 dBc/Hz at 1 MHz offset to the carrier. The radar system utilizes a hybrid structure where the voltage controlled oscillator was fabricated using 130 nm SiGe BiCMOS technology and the lower frequency components are off-the-shelf. Free field measurements of the radar showcase an unprecedented combination of 3 cm range resolution, low phase noise and low operating frequency of 6–14 GHz for inherently higher range.     

一种较好的三粒子W态概率隐态传输方案

提出一种较好的三粒子W态概率隐形传输方案,该方案用三个三粒子W直积态作为量子通道。和闫等人的方案相比,该方案具有以下的优点：提出一种新的正交完备测量基取代了以往所使用的Bell基测量。接收者根据发送者的测量结果实施适当的幺正变换操作,隐形传输成功的概率可以提高到 。     

催化剂组分对制取单壁碳纳米管的影响

采用温控电弧炉,以FeS,Ni,Mg的混和粉末作为催化剂,起弧电压为32V,放电时间为10min;研究了催化剂组成与成分对制取单壁碳纳米管的影响,确定了优化参数。在环境温度为600℃时,起弧电流为100A,催化剂FeS/Ni/Mg的组成和成分含量分别为2∶1∶2(%),5%,氦气气氛,气氛真空度为5.7×104Pa,单壁碳纳米管的产量和纯度都分别达到了12g/h和70%上,其管径为1.24～1.36nm。     

金属外壳封接中的可伐合金退火

介绍了在可伐管壳封接工艺中可伐合金退火的重要性及目的,并分析得出了可伐合金退火的最佳温度及气氛.     

一种用于高速锁相环的新型CMOS电荷泵电路

提出了一种适用于高速锁相环电路的新型CMOS电荷泵电路。该电路利用正反馈电路提高电荷泵的转换速度，利用高摆幅镜像电流电路提高输出电压的摆动幅度，消除了电压跳变现象。电路设计和H-SPICE仿真基于BL 1．2μm工艺BSIM3、LEVEL=47的CMOS库，电源电压为2V，功耗为0．1mW。仿真结果表明，该电路可以很好地应用于高速锁相环电路。     

基于CCCII的电流模式多功能双二次滤波器

该文提出了由电流控制传输器(CCCⅡ)实现的新型电流模式多功能双二次滤波器,该滤波器由CCCⅡ和两个接地电容构成,电路具有以下特点:可实现多种滤波功能;易于集成;能独立地调节0和Q,且灵敏度较低。     

Water-Surface-Mediated Precise Patterning of Organic Single-Crystalline Films via Double-Blade Coating for High-Performance Organic Transistors

Application-oriented growth of patterned organic semiconductor (OSC) thin films with a single domain is a nonnegotiable requirement for the manufacturing of high-performance organic electronic devices. However, the prevalent selective-wetting patterning method remains a challenge in controlling the density of nucleation events in microscale spaces, resulting in thin films with high grain boundary density and no preferential orientation spherulites. Herein, a simple double-blade-coating printing technique using a combination of wetting-patterned substrates to produce an array of highly crystalline OSC thin films is developed. Specifically, the approach confines the OSC crystallization on a molecular-flat water surface in specific areas, enabling a significant reduction in the number of nuclei. Consequently, patterned 2,7-dioctyl[1]benzothieno[3,2-b] benzothiophene (C₈-BTBT) thin films comprising single-crystal domains are achieved with an exceptionally high yield of 62.5%. The organic field-effect transistor array developed from such patterns of C₈-BTBT single-crystalline films exhibits an excellent average mobility of 11.5 cm² V⁻¹ s⁻¹ which is 12.5-fold higher compared to that of the reference sample fabricated via conventional single-blade coating. It is believed that this approach can be widely applied to other soluble organic materials, thereby opening up opportunities for fabricating multicomponent integrated electronics.     

光控光开关的研究进展

对前人提出了多种光开关的方案和最新研究成果进行了概括和总结,按照光开关所能处理的信号类型,将其分为两类,即基于二光平的光控光开关和基于ＲＺ码（弧子）的光控光开关,分析和研究了其工作原理和开关特性,对两类光开关的性能进行了比较。     

MSM原理及其在直线驱动器上的应用

磁控形状记忆合金（MSM）是一种新型功能材料，具有形变量大和机电能量转换效率高的特点。该文首先介绍了MSM在磁场作用下的形变机理，并测得在0．4T的磁场下其自由形变率可达3．6％。然后分析利用仿生学蠕动原理将MSM小步距的位移累加形成直线驱动器所需要的大行程的工作原理，设计出了MSM直线驱动器及其控制系统，最后给出了样机的实验结果。