A Low-Hysteresis and Highly Stretchable Ionogel Enabled by Well Dispersed Slidable Cross-Linker for Rapid Human-Machine Interaction

Ionic conductive soft materials for mimicking human skin are a promising topic since they can be thought of as a possible basis for biomimetic sensing. In pursuit of devices with a long working range and low signal delay, conductive materials with low hysteresis and good stretchability are highly demanded. To overcome the challenges of highly stretchable conductive materials with good resilience, herein a chemical design is proposed where polyrotaxanes act as topological cross-linkers to enhance the stretchability by sliding-induced reduced stress concentration while the compatible ionic liquid is introduced as a dispersant for low hysteresis. The obtained ionogels exhibit versatile properties more than low hysteresis (residual strain = 7%) and good stretchability (550%), and also anti-fatigue, biocompatibility, and good adhesion. The low hysteresis is attributed to lower energy dissipation from the well-dispersed polyrotaxanes by compatible ionic liquids. The mechanism provides a new insight in fabricating highly stretchable and low-hysteresis slide-ring materials. Furthermore, the conductivity of the ionogels and their responses to strains and temperatures are measured. Benefiting from the good conductivity and low hysteresis, the ionogel is applied to develop a wireless communication system to realize rapid human-machine interactions.     

基于可射击概率约束的防空作战火力优化分配

针对防空作战火力优化分配中未考虑可射击概率影响防空作战效能的问题,提出一种基于可射击概率约束的火力分配模型.该模型综合考虑可射击概率、空袭强度、火力单元转火时间等多种因素,能够在保证满足可射击概率和联合毁伤概率阈值前提下,优先使用反应快的火力单元拦截飞临时间短的目标,并尽量减少火力资源消耗,为防空系统提供持续作战能力....     

含铝炸药爆热性能与破片加载特性关系探讨及验证

以浇注HMX 基含铝炸药为研究对象,构建炸药爆轰加载假设模型。探讨爆热与破片速度的关系,并使用 不同粒径设计了不同铝含量的炸药配方,测试了炸药爆速和爆热及其对全预制破片速度和穿甲率的影响。试验结果 表明：随着铝氧比和爆热的增加,破片速度和穿甲率呈现先升后降的趋势,当铝氧比和爆热分别为0.35 和6 200 kJ/kg 时,其破片速度和穿甲率分别为1 890 m/s 和89%,破片加载能力达到最大,验证了含铝炸药爆热与破片加载特性存 在数学极值关系,工程上存在最佳匹配点。     

一种低轨双星高脉冲重复频率雷达信号的定位模糊消除算法

针对低轨(LEO)双星到达时间差(TDOA)定位系统中雷达信号的定位模糊问题,该文分析了高重频信号的模糊特性,演示了虚假定位点的产生过程,提出一种基于时差序列变化趋势匹配(VTMT)的定位模糊消除算法.在测量时差序列与定位结果对应的理论时差序列之间的残差近似服从正态分布的条件下,通过两个序列的欧式距离作为相似程度衡量依据,筛选出测量时差线与理论时差线最为接近的定位点作为目标辐射源真实位置.校验台测试信号验证了该算法的有效性.仿真结果表明,该算法能够显著提高无模糊定位概率,对长基线时差定位系统中雷达信号的定位具有较高的应用价值.     

Enhanced solder joint bonding strength of electronic packaging with electrowetting effect

This paper reports a novel method to enhance solder ball or solder ring bonding strength by using electrowetting-on-dielectric (EWOD) effect. With a low melting point, the metal Sn has been widely used in electronic packaging technology. Since Sn will be molten into liquid when the temperature is increased above the melting point, the method for treating liquid can be herein employed. Contact angle of the molten Pb-free balls or ring structure on silicon substrate have been experimentally changed by applying electric field across the thin dielectric film between the molten solder and the conductive silicon substrate. The contact area between the solder and the substrate is enlarged due to the decrease of the contact angle. Our testing results on the EWOD enhanced packaging structures of solder balls, flip-chip and solder ring hermetic package generally show about 50% enhancement in bonding shear strength. The significantly enhanced solder link bonding strength is hopeful for improving packaging reliability and is promising to be used in high performance silicon based electronic or microelectromechanic SiP (system in package) technologies.     

基于LabVIEW语言的信号播放、采集与回放系统

信号采集与回放系统通过虚拟仪器技术平台,利用LabVIEW语言进行信号读取、播放、采集,通过播放存储的目标或环境噪声产生的震动和声音电信号,用播放的信号激励微震台,微震台的传感器重新进行数据采集,通过调整自适应滤波器参数,使得重新采集的信号逼近原读取信号.详细介绍了如何利用LabVIEW语言编写的程序用于将存储数据调出读取、播放、采集,并对信号波形特点进行分析.     

浅析“禁止重复授权”原则——我国专利法如何避免“重复授权”

"禁止重复授权原则"是我国专利制度的基本原则,分析了我国专利法、实施细则关于"禁止重复授权"的规定,结合审查实践中所遇到的实际情况,较为全面地介绍了我国专利法如何避免"重复授权"的具体操作方式,为申请人如何保护自己的利益提供了帮助。     

HEMT太赫兹探测器响应度和NEP的检测与分析

在0.8～1.1 THz内,对AlGaN/GaN高电子迁移率晶体管(HEMT)太赫兹探测器的响应度和噪声等效功率进行了具体测试和分析。在太赫兹波辐射下,HEMT太赫兹探测器源漏端产生能被栅压灵敏调控的直流光电流。该型探测器在300 K和77 K下的电流响应度分别为83 mA/W和4.1 A/W,电压响应度分别为4 kV/W和50 kV/W,噪声等效功率分别达到22 pW/Hz0.5和1 pW/Hz0.5。采用两种较为典型的测量方法,通过对实验结果的比较,确定了影响该类型探测器的响应度和噪声等效功率的主要因素,并提出了增强响应度和降低噪声等效功率的具体措施。     

截集型特征加权模糊C-均值聚类算法

已有的特征加权型模糊C-均值（WFCM）聚类算法可以有效地提取数据的相关特征,WFCM存在的主要问题是收敛速度慢和对噪声敏感。借助模糊集的截集方式对WFCM的隶属度值进行修改,提出截集型特征加权模糊C-均值聚类算法：SWFCM。SWFCM不仅具有良好的特征提取能力,而且具有收敛速度快和对噪声稳健的优点。实验结果表明,SWFCM的总体性能优于原有的WFCM聚类算法和截集模糊C一均值聚类算法。     

基于串口通信的YDG-1型RTU参数配置与调试系统的实现

以串口通信技术为基础,结合对RTU参数进行配置与调试的特点与应用需求,提出了该参数配置与调试系统的基本框架,并设计开发了该系统。该系统可视化好,交互性强,通过配置文件及RTU两种方式批量导入导出参数信息,提高了效率,克服了普通超级终端系统命令行输入及每次只能进行单个参数配置的不足。实践证明,该系统运行稳定,操作简单易行,为YDG-1型RTU参数配置与调试带来诸多方便。