Transparent,Highly Stretchable,Rehealable, Sensing,and Fully Recyclable Ionic Conductors Fabricated by One‐Step Polymerization Based on a Small Biological Molecule

To date, various stretchable conductors have been fabricated, but simultaneous realization of the transparency, high stretchability, electrical conductivity, self‐healing capability, and sensing property through a simple, fast, cost‐efficient approach is still challenging. Here, α‐lipoic acid (LA), a naturally small biological molecule found in humans and animals, is used to fabricate transparent (>85%), electrical conductivity, highly stretchable (strain up to 1100%), and rehealable (mechanical healing efficiency of 86%, electrical healing efficiency of 96%) ionic conductor by solvent‐free one‐step polymerization. Furthermore, the ionic conductors with appealing sensitivity can be served as strain sensors to detect and distinguish various human activities. Notably, this ionic conductor can be fully recycled and reprocessed into new ionic conductors or adhesives by a direct heating process, which offers a promising prospect in great reduction of electronic wastes that have brought acute environmental pollution. In consideration of the extremely facile preparation process, biological available materials, satisfactory functionalities, and full recyclability, the emergence of LA‐based ionic conductors is believed to open up a new avenue for developing sustainable and wearable electronic devices in the future.     

数字视频对讲系统的全程唇音同步测试方法

全数字视频对讲系统音视频信号的采集、编解码等信号处理是分别进行的,信号在传输过程中将产生不同的延时,这就导致在视频通话过程中出现唇音不同步的现象.提出一种基于非介入式测量技术的全数字视频对讲系统的唇音同步测试方法,适用于对音视频同步性能要求较高的实时全数字视频对讲系统,且不受通信接口、传输协议、加密通信技术等限制.     

基于白光LED的可见光通信研究进展

白光LED将成为未来主要的照明光源, 这使得基于白光LED的可见光通信(VLC)在通信网络中具有一定的优势。介绍了可见光通信系统的优势及发展概况, 分析了包括通信速率的提高、全双工通信的实现以及与现有通信网络互联等关键技术, 综述了可见光通信技术的应用现状, 并展望了可见光通信技术的应用前景。     

一种新型小型化微带天线的全波分析

本文介绍了一种新颖的小型化微带天线.利用在贴片上面开一个C型缝隙,使得谐振频率明显降低,尺寸仅是传统的半波长微带天线的33%,阻抗带宽略有增加,并且加工相对简单.利用时域有限差分法(FDTD)对这种天线进行了较为全面的理论分析,给出了输入端反射损耗特性和辐射特性.同时给出了矩量法(MoM)分析结果和测量结果,具有较好的一致性.此种天线可应用于对天线尺寸有严格限制的场合.     

双层包覆对超多孔发射药燃烧性能的影响

为进一步提高37孔发射药的燃烧渐增性,采用双层包覆工艺对37孔硝基胍发射药进行包覆。通过三维视频、扫描电镜、DSC及定容燃烧测试等方法研究了包覆效果、包覆层与基药的相容性、不同包覆层质量含量及包覆层层数对燃烧性能的影响。结果表明,双层包覆药厚度较为均匀;包覆层和基药相容性良好;在相同包覆层含量8%的条件下,双层包覆药的燃烧增面值较单层包覆药明显提高。双层包覆药的燃烧增面值ΔL随着外包覆层的增加呈先增后降的趋势,在内、外包覆层质量含量均为5%的条件下,燃烧渐增性最大,其ΔL值为0.1431 MPa~(-1)·s~(-1),相对于37孔基药,其燃烧增面值提高了43.53%。     

CDF填充树脂在全粒面牛皮上的应用研究

本文研究了CDF树脂填充全粒面牛皮时渗透剂用量、填充液配比、填充深度等对填充效果的影响,确定了该树脂在全粒面牛皮上使用时相应的应用工艺。     

采用自适应频率补偿的全片上集成、面积优化的低压差线性稳压器

本文提出了一种全片上集成、面积优化的低压差线性稳压器（LDO）新结构。利用提出的自适应频率补偿（AFC）技术,该LDO在保持零到最大负载电流情况下稳定的同时,实现了全片上集成。与此同时,因为采用了一个小型的传输管（在AFC技术中该小型传输管起到使输出级增益快速下降的作用）,LDO的面积得到了很大的优化。该LDO在CMOS 0.35μm工艺下流片,仅占用了220×320μm 的芯片面积。这与采用相同特征尺寸工艺的先进设计相比面积缩减至58%。测量结果表明,该LDO在消耗54μA 静态电流的情况下能提供0-60mA 的负载电流。同时,在输入电压为2至3.3V时,稳压输出为1.8V。     

使用DirectX技术实现视频会议系统中流畅的全双工音频通信

随着经济的发展，各个企事业单位和政府部门为了提高自身竞争力和提高工作效率，都考虑使用新型的视频会议模式代替传统的会议模式，所以研究优质而实用的视频会议系统很有必要。本文详细分析如何采用微软公司的DirectX技术，实现视频会议系统中流畅的全双工音频通信功能。这是开发优质视频会议系统的重要一步。     

Scheduling Rate-Constrained Flows with Dynamic Programming Priority in Time-Triggered Ethernet

Time-triggered (TT), Rate-constrained (RC) and Best-eff ort (BE) traffics are included in Time-triggered ethernet (TTEthernet). For RC messages trans-mission is aff ected by TT messages, traditional schedul-ing policy cannot be well applied in TTEthernet. Dynamic programming priority (DPP) algorithm combines priority policy and dynamic programming algorithm for scheduling RC flows. The time slice for RC flows transmission is got by SMT solver YICES; RC flows are classified to different groups according to the priorities; Higher priority pack-ets in one time slice are scheduled using First input first output (FIFO) policy and lower priority packets are sched-uled by Dynamic programming policy. DPP policy guaran-tees different real-time requirements of heterogeneous RC flows, and make the best of time slice resource in aviation industries. The upper bound End-End of three methods and algorithm feasibility is analyzed. Simulation in avia-tion shows that DPP policy can obtain better real-time performance than other scheduling algorithms.     

一种基于随机序列的公钥叛逆者追踪方案

基于离散对数困难问题,利用随机序列提出一种公钥叛逆者追踪方案。该方案采用多项式与过滤函数来构建,当缴获盗版解码器时,只需通过一次输入输出即可确定叛逆者。若需要撤销或恢复多个叛逆者时,其能在不更新其他合法用户私钥的前提下,实现完全撤销多个叛逆者或完全恢复已撤销用户。性能分析证明,该方案不仅存储、计算和通信开销低,还具有完全抗共谋性、完全撤销性与完全恢复性以及黑盒追踪的特点。