仿真软件在“微机原理与接口技术”教学中的应用

针对＂微机原理与接口技术＂课程内容和特点,介绍了计算机仿真软件：EMU8086、MFS和Proteus ISIS,分别适用于汇编语言程序设计、DOS功能调用和硬件接口技术等不同知识点,并且具有操作简单、界面直观等优点。仿真软件的应用能够改善课堂教学模式,激发学生的学习兴趣,帮助学生更好地掌握理论知识,为实验和实践操作打下良好的基础。     

基于格的变色龙签名方案

与普通数字签名相比,变色龙签名不仅满足不可否认性,而且具有非交互式、不可传递的特点。然而,基于传统数学难题构造的变色龙签名方案不能抵杭量子计算机的攻击。为了设计在量子计算机环境下依然安全的变色龙签名,利用格上小整数解问题SIS(Small Integer Solution)和非齐次小整数解问题ISIS(Inhomogeneous Small Integer Solution)的困难性假设,构造了基于格的变色龙签名方案。在随机预言模型下,证明了该方案在适应性选择消息攻击下 是安全的。     

Capitalizing on the Koran to fuel online violent radicalization: A taxonomy of Koranic references in ISIS’s Dabiq

The current study set out to investigate to what extent ISIS is bolstering its jihadist ideology on a ‘cut-and-paste’ or ‘cherry-picked’ version of Islam in their renowned online propaganda magazine Dabiq. The main objective was to examine in a systematic and quantitative way to what extent ISIS utilizes the Koran in an atomistic, truncated and tailored manner to bolster its religious legitimacy. A total of 15 issues of Dabiq and 700 Koranic references were scrutinized. By means of a quantitative analysis we developed an innovative taxonomy of Koranic chapters and verses (i.e. surahs and ayat, respectively) on the basis of their appearance in Dabiq. Our large-scale data analysis provide consistent empirical evidence for severe decontextualization practices of the Koran in three ways: (1) a thin, Medinan-dominated religious layer, (2) ayah mutilation, and (3) clustered versus exclusive mentions. Limitations and implications for future research, policy makers and CVE initiatives are discussed.     

基于非编码矩阵键盘的数字音乐电子琴的仿真和实现

数字音乐电子琴是面向社会娱乐休闲和各个层次学生的不错选择。结合指导学生单片机实训课程教学中的选题,采用了图表与文字结合的方式,对数字音乐电子琴的开发做了进一步的研究和完善。仿真和实现结果表明数字音乐电子琴在现代生活中是可以尝试的新选择,单片机具有强大的控制功能和灵活多样的编程实现功能,它可以为我们现代生活不断带来新的挑战。     

传感器即结构件关键技术及研究进展

传感器即结构件技术是研究超大面积轻质相控阵雷达与空天预警探测平台共形一体化集成的相关技术。由于传感器即结构件飞艇具有超强预警探测能力、极轻质、极低功耗、长工作寿命和机动性能灵活等优点,因此成为平流层预警探测的首选装备。介绍了平流层预警探测的需求和大孔径探测的理论依据,结合传感器即结构件技术的特点,阐述了该技术的项目背景、规划和研究进展,对其关键技术和未来发展趋势进行了分析讨论,并对我国传感器即结构件技术的规划和发展提出了建议。     

Cable tray FIRE tests simulations in open atmosphere and in confined and mechanically ventilated compartments with the CALIF3S/ISIS CFD software

Fire hazard in nuclear power plants (NPPs) is particularly often investigated as potential cause of safety equipment failure and confinement loss. Many fire events recorded in NPPs involve electric cables, widely used throughout facilities. IRSN is developing the CALIF3S/ISIS computational fluid dynamics software devoted to fire simulation in large‐scale confined and mechanically ventilated compartments. This paper presents two aspects of the CALIF3S/ISIS code ability to simulate fires. The first one concerns vertical and horizontal spreading of a cable tray fire in open atmosphere using an approach based on the FLASH‐CAT cable fire spread model. Resorting to the suitable parameters of the FLASH‐CAT model based on video fire analyses of tests enables to properly compute the heat release rate of the fire. The second aspect concerns the ability to simulate the evolution and consequences of fires in confined and mechanically ventilated compartments. For these cases, the heat release rate measured during the corresponding experiment is used as input data for the calculations. The predicted evolutions of pressure or gas temperatures are in relatively good accordance with the experiments. The major discrepancy concerns gas concentrations in the fire room which is attributed to a lack of information about the properties of the fuel material.     

格上高效的完全动态群签名方案

为降低完全动态群签名加入和撤销机制的复杂性,将动态群签名思想引入NGUYEN等人提出的格上群签名方案,提出一种改进的完全动态群签名方案.在改进方案中,用户产生自己的签名密钥而不是由群管理员产生,当用户加入群时,群管理员验证用户身份并为其颁发证书,用户成为群成员后用自己的签名密钥和证书进行签名.若群成员有不合法行为或想退...     

CAS登记号查询数据库的建立

在化学及相关研究中,常常需要根据化合物的CAS登记号查询其结构.本文通过整合山东省生物信息工程技术研究中心现有的数据,创建成一个化合物CAS登记号与其结构相互对应的数据库,应用于科研.先从CMC、MDDR、ACD、CNPD、NCI等7个数据库中,共导出575468个化合物的相关数据,这些数据经处理后,导入ChemFinder化学数据库系统.通过查重,保留了404269个独立CAS登记号的化合物,每个化合物都包含其结构、CAS登记号、来源数据库及编号、分子式、分子量、脂水分布系数等信息.数据库还保留了sdf和mol2两种文件格式,以满足虚拟筛选等后续研究的需要.     

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介绍了利用ＣＤＳ／ＩＳＩＳ２．３版软件对＜＜中国石油文献＞＞数据建立单汉字索引，进行单汉字检索；发挥该软件的字段无侄排检索功能并采用二次检索的方式进行全字段查找，以及利用该软件的Ｐａｓｃａｌ高级语言接口开发编程，进行数据加工和文献统计等方面的情况。通过分析上述数据库的有关统计结果，提出了收录文献时既要重点摘录学术性强，理论水平高的论文，也要兼顾实用性强，篇幅短的文章；采用多库互补检索，提高查全率的     

用ISIS/Draw 2.4轻松绘制化学图形

概述了专业化学绘图软件ISISDraw2.4的功能和特点,通过几个典型例子介绍了ISISDraw2.4的应用和使用方法。