网络化条件下的态势信息分发与Pub/Sub通信范型

探讨了网络化条件下态势信息分发的概念和机制.首先介绍态势信息分发的现状并分析其存在的不足;其次将发布/订阅(Pub/Sub)通信范型引入网络化态势信息分发机制之中,提出基于Pub/Sub网络化态势信息分发机制,分析其合理性和有效性;最后根据未来网络化战争的发展方向,预测其发展趋势.     

New low-earth orbit satellites authentication and group key agreement protocol

Due to the function of communication and continuous monitoring,the low-earth orbit satellites are widely used in the aerospace field.However,there is no special authentication protocol in the existing satellite communication system.In order to solve this problem,a lightweight authentication protocol which considering the switch of communication path in the authentication process was designed for the low-earth orbit satellites,and the proposed protocol was verified by simulation and compared with the 3GPP AKA protocol.The simulation results show that the protocol has a 20% higher efficiency than 3GPP AKA protocol,and the spend of group key agreement protocol is about 300 ms.     

互联网金融背景下大学生“校园贷”风险防控体系建构——以南京交通职业技术学院为例

互联网金融是在“互联网+”大背景下快速发展起来的, “校园贷”作为其重要组成部分近几年发展迅猛。 但由于校园网络借贷受众的特殊性, 以及相关风险防控手段的缺失, 引发了一系列问题, 受到社会舆论的普 遍关注。通过设计调查问卷, 对南京交通职业技术学院学生进行调查, 并对问卷调查结果进行认真的分析, 得出的结论是:要有针对性地构建“校园贷”风险防范体系;政府、学校、家庭三方必须通力协作, 积极发挥 各自作用;要加强对学生的教育管理, 正确引导大学生理性消费。     

Empirical Analysis on Influence Mechanism of Cohesiveness and Collective Efficacy of Virtual Community Based on Triadic Reciprocal Determinism

The virtual community has become a new life style as for human, but the public＇s acceptance is relatively low at present. So the research about the mechanism of the influence on the cohesiveness and the collective efficiency in virtual community has an important theoretical value and practical value. In the paper, the key variables that affect virtual community cohesiveness are extracted from two aspects--self-perception of community members and community environment, and the influence mechanism model of virtual community cohesiveness and community collective efficiency is established based on Triadic Reciprocal Determinism. By means of the questionnaire on the community members and the empirical analysis, the key factors influencing cohesiveness of virtual community are brought up, as well as the mechanism that the four dimensions of cohesiveness work on collective efficiency. According to the results, it is practically meaningful that the problems and insufficiency in the operation of existing virtual community are discovered, which guides the operating managers of the virtual community to formulate operation policy of the virtual community for operating managers to develop strategies.     

基于像素分组的帧内预测快速算法

为了降低HEVC帧内编码的复杂度,基于HM 12.0提出了一种帧内预测快速算法.首先将35种预测方向分成5组,然后基于像素提取PU块的梯度方向信息并匹配到其中一组,最后在RDO运算时根据统计信息适当降低了候选模式的数量.实验结果表明,与JCTVC最新源码HM 12.0相比,该算法平均能够节省20％的编码时间,峰值信噪比和码率变化不大.     

信标信号频谱在接收机跟踪性能分析上的应用

接收机锁定卫星信标后,经过二次或三次变频将C频段信标转变为70 MHz中频,然后通过解调单元从中频中提取误差信号。通过分析比较信标信号、L频段频率、70 MHz中频信号频谱使跟踪系统的性能指标层次化,从信标频谱中提取有用信息,全面判断数字接收机跟踪性能,对单脉冲跟踪体制下的接收机故障排查具有一定的指导意义。     

基于S3C2440A的Windows CE系统快速启动方案

如何快速启动节省时间,是Windows CE使用者普遍关注的一个问题。为了加快系统的启动速度,在介绍Windows CE启动流程和分析影响启动速度的因素的基础上,提出减小内核体积、使用Multi-bin技术、关闭串口打印输出、使用不同注册表形式等快速启动方案,并通过测量数据作为依据。实验证明,提出的方案明显提高了Windows CE系统的启动速度。     

基于AVR的LED旋转屏设计

为了使显示屏的体积更小,成本更低,同时又能有较丰富的显示效果,采用AVR微处理器ATmegal6L作为核心控制芯片,由直流电机带动一列贴片LED旋转设计了圆柱形LED显示屏,可以由无线红外遥控装置随时切换显示的内容,可显示不同的文字、图案、系统时间等。利用少量发光二极管实现海量发光二极管才能实现的显示屏,同时该屏在旋转过程中显示,使得可视角更广,可以达到360°全方位。     

交通事故现场防入侵设备设计

为了提高交通事故现场防护水平和预防二次事故,利用C8051F020单片机以及MMA7260,MicroMag2等传感器设计了一种设备,对车辆入侵进行检测,迅速有效地判断车辆是否侵入防护现场,根据检测结果实现报警。