基于多线程的AES-ECB改进设计与性能分析

为了满足高速即时通信对密码运算的性能要求,在研究AES-ECB典型设计的基础上,提出了一种基于多线程技术的AES-ECB改进设计方案。通过对算法中间迭代过程进行分割,并将其例化为多个子线程,改进了算法运行流程,实现了子线程间的“类流水”操作。实例性能分析表明,相比于单线程,多线程性能提高了约0.46至4.27倍;当线程数为12时,算法处理性能最低为520Mbps,适用于对加解密速度要求高的应用场合。     

基于ARM的某型火箭炮角限位器模拟系统设计

为减少装备损耗,展现某型火箭炮角限位器工作过程和常见故障,设计了基于ARM的角限位器模拟训练系统;以TX2440A开发板为基础,设计了高低角限位器模拟装置、方向角限位器模拟装置和输入输出控制显示电路;采用Linux C++多线程编程技术和QT技术,设计了硬件驱动程序,驱动调用程序和软件操作界面,实现了两种角限位器工作过程和常见故障的模拟;实验结果表明,该系统能准确、实时地反映角限位器的工作状态和故障现象,为教学训练提供了可靠的平台。     

H.263视频编解码系统的软件实现

提出了一个完整的Ｈ．２６３视频编解码系统的软件实现方案．采用多线程技术同时完成编码、解码发送、接收、显示等多个任务,在编码模块中采用汇编语言,提高了执行速度,引入ＭＭＸ技术后,运行速度得到进一步提高．     

eSHAFTS: Integrated and graphical drug design software based on 3D molecular similarity

With the development of computer technology, computer-aided drug design (CADD) has become an important means for drug research and development, and its representative method is virtual screening. Various virtual screening platforms have emerged in an endless stream and play great roles in the field of drug discovery. With the increasing number of compound molecules, virtual screening platforms face two challenges: low fluency and low visibility of software operations. In this article, we present an integrated and graphical drug design software eSHAFTS based on three-dimensional (3D) molecular similarity to overcome these shortcomings. Compared with other software, eSHAFTS has four main advantages, which are integrated molecular editing and drawing, interactive loading and analysis of proteins, multithread and multimode 3D molecular similarity calculation, and multidimensional information visualization. Experiments have verified its convenience, usability, and reliability. By using eSHAFTS, various tasks can be submitted and visualized in one desktop software without locally installing any dependent plug-ins or software. The software installation package can be downloaded for free at http://lilab.ecust.edu.cn/home/resource.html . © 2019 Wiley Periodicals, Inc.