基于IDEA算法的文件加密系统研究

选择IDEA算法作为基础加解密算法,研究和设计了一套基于该算法的文件加密系统,给出了该系统的设计方案,详细描述了系统的工作原理和流程,实现了设计方案的各功能模块,测试了该系统的功能、性能、稳定性,并对测试结果进行了分析。     

全球化与文化的碎化

信息资源的全球化促进了世界化一体化,促进了网络化的诞生。化作为人的创造呈现出时代性演进和地域性展开及异质性绵延,因此,一方面网络提供了全球化背景下多元化直面的加力平台;另一方面在各种化的多元互创中,与之相伴随的则是化“去国怀乡”的愁绪和寻找往古之梦的冲动。走向世界的民族需要在网络世界上建立自己化的家园。     

Development of Shallow Footing Anti-Ram Bollard System Through Modeling and Testing

In past terrorist attacks, vehicle borne improvised explosive devices (VBIED) have been the primary manner of attacking buildings and infrastructures. Preventing unauthorized vehicles from approaching a protected area with anti-ram systems would maintain an established standoff distance against moving and stationary vehicles and consequently reduce blast and debris threats. This strategy has been considered the first line of defence against terrorists. Several types of anti-ram devices have been developed in accordance with U. S. Department of State K-rating criteria, for example, wedge barriers, rising beams, sliding/swing gates, and drop arms. However, these devices typically need a deep foundation for installation and can't be implemented into many locations where a depth of excavation is limited in order to protect utility lines of buildings and infrastructures. This paper presents a recent development of a series of shallow footing anti-ram bollard systems (SFABS) that can satisfy K-12 rating with only five-inch thick footing. A high-fidelity physics based finite element technique with a vehicle crash model is used for predicting anti-ram capacity and determining design parameters of the SFABS. Full-scale vehicle crash tests of the developed SFABS systems have been carried out to validate the design and analysis.     

城市道路通过远引掉头间接左转最佳位置选取方案

由于掉头口位置选取是城市道路远引掉头技术中的重要因素,为了提高远引掉头实施效果,从安全和运行效率2个方面对远引掉头口和上游支路出口之间的距离对远引掉头实施效果的影响进行了分析.对美国佛罗里达州开展了广泛的数据采集,共得到179个不同路段的历史事故数据,采用录像观测法获得了29个不同路段的交通流运行数据.在实测数据的基础上构建了事故率模型和车辆运行时间模型.研究表明,掉头口和上游支路之间的间距对掉头车辆的安全性和运行效率有显著影响.根据研究结果,提出了针对不同道路条件下设置掉头口和上游支路出口应保证的最短距离以方便司机使用掉头口.分析研究结果可为国内交叉口改造提供借鉴.     

汽车碰撞试验测控系统的开发研究

介绍了利用虚拟仪器技术在LabVIEW平台上开发研制的汽车碰撞试验测控系统,分析了开发中遇到的采样数据丢失问题产生的原因,利用C 与汇编语言嵌套程序和LabVIEW中的子函数调用等方法成功地解决了该问题,并在试验系统中得到了验证。     

Development of Shallow Footing Anti-Ram Bollard System Through Modeling and Testing

In past terrorist attacks, vehicle borne improvised explosive devices （VBIED） have been the primary manner of attacking buildings and infrastructures. Preventing unauthorized vehicles from approaching a protected area with anti-ram systems would maintain an established standoff distance against moving and stationary vehicles and consequently reduce blast and debris threats. This strategy has been considered the first line of defence against terrorists, Several types of anti-ram devices have been developed in accordance with U.S. Department of State K-rating criteria, for example, wedge barriers, rising beams, sliding/swing gates, and drop arms. However, these devices typically need a deep foundation for installation and can＇t be implemented into many locations where a depth of excavation is limited in order to protect utility lines of buildings and infrastructures. This paper presents a recent development of a series of shallow footing anti-ram bollard systems （SFABS） that can satisfy K-12 rating with only five-inch thick footing. A high-fidelity physics based finite element technique with a vehicle crash model is used for predicting anti-ram capacity and determining design parameters of the SFABS. Full-scale vehicle crash tests of the developed SFABS systems have been carried out to validate the design and analysis.     

对我国股市监管困境的法律思考

我国股市长期的非理性暴涨、暴跌及其与国民经济相背离的走势,暴露出股市监管陷入了失灵的困境。而股市制度缺陷、监管理念扭曲和监管职能错位是我国股市监管失灵的重要原因。在完善股市基本制度和监管制度的基础上重塑监管理念,正确定位监管职能,是我国股市监管走出困境的理性选择。     

The Distortion and Deformation of Values under Cultural Crash--On Toni Morrison's the Bluest Eye

Toni Morrison presents how the white culture crashed on the black people and changed their values in The Bluest Eye.The tragedy story of black girl Pecola reveals that the negative impact of white culture is the major reason for distorted and deformed values of black people.Besides exposing the astonishing reality of black people’s existence,Toni Morrison also explores the way to resist pressures from white culture and keep black people’s mental independence.     

鸟击防治系统策略分析

位于鸟类迁徙路线上的枢纽性机场,发生鸟击的机率大大增加。本文以双流机场为例,针对易发生鸟击事件的重点季节重点时段,结合机场进离场程序特点,采用被动防御与主动防治两种手段,倡导建立防鸟击安全信息自愿报告系统,以构建多方参与的鸟击防治系统为主要诉求点,以期大幅度降低鸟击事件发生的概率。     

基于变量相互影响的高速公路基本路段事故预测模型构建方法

为了提高基本路段事故预测模型（SPF）的预测精度,收集了640个基本路段设计资料及事故资料,应用3个负二项回归模型（NB）和3个广义负二项（GNB）回归模型对收集的数据进行拟合,并分析了解释变量的交互影响。研究表明在上述6个模型中,其中考虑了年平均日交通量和路段长度交互影响的2个模型（一个为 NB,另一个为 GNB）,其预测结果更为合理。进一步综合对比表明考虑交互影响时,NB 模型和GNB 模型的适用性几乎相同,而 GNB 略佳。