基于星上自适应FEC的卫星数据分发

为了解决卫星数据分发系统中雨衰对下行链路的异构性影响,建立了基于再生转发器和多波束技术的卫星数据分发系统简化模型,提出了采用星上自适应分组级FEC（Forward Error Control）的下行链路差错控制方法,针对下行链路的降雨等级自适应选择纠错码率,在不占用上行共享链路的情况下,实现对下行链路差错控制的动态调整,给出了采用RSE码的星上自适应FEC的算法公式,通过MATLAB软件和端到端的FEC技术进行了仿真比较分析,结果表明,当下行链路降雨率小于50%时,网络吞吐率可提高12%~25%。该策略可以为多波束宽带卫星数据分发系统的设计提供参考。     

基于攻击策略的复杂网络拓扑结构优化模型

针对不考虑攻击策略时以自然连通度作为复杂网络抗毁性测度存在的缺陷,用节点的改进总连通度作为目标函数建立了基于按度攻击策略的复杂网络拓扑结构优化模型,并运用收敛速度较快的自适应局部增强微分进化算法（ADMPDE）对复杂网络的拓扑结构优化进行仿真分析。仿真结果验证了该模型的合理性和算法的适用性,优化后的复杂网络的度大节点比例提高了32%,其抗毁性得到明显改进,并得到一些有意义的结论。相关内容可为该领域的进一步研究提供有价值的参考。     

量子通信安全性研究

随着量子通信的发展,安全问题引起了人们的极大关注。本文分析了量子通信安全的意义,并从密钥分发、量子加密和量子认证三个方面归纳了国内外量子通信安全问题的研究进展情况。最后,基于对量子通信安全存在的问题,指出了今后该领域的研究方向。     

全局编码核加密的弱安全网络编码模型

针对无线传感器网络（WSN）应用上人们关注的弱安全网络编码在窃听集合方面的限制问题 ，采用神经网 络与混沌加密相结合的方法，设计了一种全局编码核加密的弱安全网络编码模型。该模型通 过对全局编码核的保密传输，可以在整个网络都被窃听的情况下使通信安全能得到保障，且 通过计算验证，其能耗没有明显增加，能以较小的代价实现对搭线窃听攻击的有效防护。     

基于图论的认知无线网络频谱动态分配

在认知无线电网络中，图论与量子遗传算法相结合的频谱分配策略能够提高频谱利用率，但存在早熟和收敛精度不够等缺点。为了解决该问题而实现算法的优化，对图着色理论的频谱分配模型进行数学建模，并针对该模型提出了改进的量子遗传算法。首先，通过使用小生境技术初始化种群，使种群分布更加广泛、算法的收敛度更高；其次，根据进化代数对量子旋转角进行实时动态调整，对染色体进行阈值变异，防止个体陷入早熟，跳出局部解；然后，对干扰约束条件进行重新设计，有效地避免盲目性，提高了网络的公平性和网络效益。仿真结果表明，所提算法有效地提高了频谱利用率，极大地增强了网络系统的性能。     

一种基于SDN的开放SaaS平台网络安全体系设计

为解决开放软件即服务（SaaS）平台下的网络安全问题,将软件定义网络（SDN）与开放SaaS平台建设相结合,提出了一种基于SDN的开放SaaS平台网络安全体系设计思路。在对系统物理模型、功能模型与协同模型进行分析的基础上,设计了系统体系结构,分析了体系构成关键要素,给出了系统典型应用示例。基于SDN开展SaaS平台网络安全系统建设,对提高系统的安全性与开放性、构建满足用户个性化需求的网络安全体系具有重要意义。     

主密钥在组播密钥管理中的应用

本文在改进的RSA体制基础上给出主密钥的生成算法,并在主密钥的基础上提出了主密钥管理方案,该方案将参与组播的成员分成若干子组,每个子组的密钥生成、分发和更新由一个主密钥控制器完成。当成员变化时,设计的密钥更新策略同时满足前向安全和后向安全,这就解决了组通信中的密钥管理问题,实现了安全的组播。同时该方案使得每个用户只需存储和管理一个密钥,就能与组内或组外的用户进行安全通信,降低了用户的负载。因此主密钥管理方案能适用于大规模的、在网络中广泛分布的和动态的组。     

网络信息安全管理浅析

在互联网络飞速发展的今天,由于技术上的缺陷以及思想上不购重视等原因,在现代网络信息社会环境下,存在着各种各样的安全威胁。这些威胁可能会造成重要数据文件的丢失,甚至给政府、银行证券以及企业的网络信息系统带来了极大的损失和危害。网络攻击的主要方式包括口令攻击、软件攻击、窃听攻击、欺诈攻击、病毒攻击以及拒绝服务攻击等,而网络安全的防范措施则包括安装防火墙、防止内部破坏、口令保护和数据加密等多种方式。网络安全防范是一个动态的概念,重要的是要建立一个网络安全防范体系。     

基于蜜罐的入侵检测

针对计算机入侵检测技术中存在的检测率低而误报率、漏报率高的问题,提出了基于蜜罐的入侵检测系统模型.该模型将在被保护的网络系统上对流经的网络数据包进行实时监控,分析蜜罐检测到的入侵数据,提取特征属性并生成规则导入到入侵检测系统,实现了入侵检测技术、蜜罐技术与防火墙技术的联动,达到动态更新八侵检测系统规则,提高检测率的目的.实验结果表明,该系统模型不仅可以保护网络和主机不受已有攻击的威胁,还可以检测出未知的攻击,达到了预期效果.     

论3G认证和密钥协商协议

详细分析了3G的认证和密钥分发协议的过程及其安全性,并针对的提出了可能存在的攻击漏洞,提出了一个改进的构想。     

Universal Coverage, Pinpoint Illustration and Profound Impact HTC 2008 Intermedia Recommendation and Introduction Meeting

Holding 88 percent of train media resources across China, based on "Time Cube", on the 2008 Intermedia Recommendation and Introduction Meeting on December 19, 2007, HTC announced its high-profile strategy of tour marketing and tapping the immeasurable potentials on the train. Meanwhile, HTC officially launched its brand new product Olympic Train on the meeting, providing a fabulous platform for all the brands that are prepared to do a smart marketing on the occasion of 2008 Olympic Games.     

Market presence in China strengthened Network growth and Dual-Chinese-Hub Strategy More frequet Flyer Benefit——Air China and shanhai Airlines Join Star Alliance

In the end of 2007, Air China Limited (hereinafter "Air China") and Shanghai Airlines, formally joined Star Alliance at a ceremony held in the new Terminal Three at Beijing Capital International Airport. With the addition of the two Chinese airlines, Star Alliance now has 19 member carriers operating 17,000 daily flights to 897 destinations in 160 countries.     

A World of Love 2008 Music Grand Ceremony

Under the guidance of the theme slogan of the 29th Olympic Games - One World One Dream, with dream, love and dedication as its theme, the 2008 Music Grand Ceremony ＆ 1000 People Charity Concert on 100 days cotmtdown to Paralympic Gamesis officiaily launched on December 22, 2007. The 2008 Music Grand Ceremony is sponsored by China Disabled Persons＇ Federation, and co-hosted by National Paralympic Committee of China,     

MUYANG GROUP

With its headquarters in the historic city of Yangzhou,Jiangsu Muyang Group Co.,Ltd has since its founding in 1967 grown into a well-known group corporation whose activities cover research ＆ development,project design,manufacturing,installation and services in a multitude of industries including feed machinery and engineering,storage engineering,grain machinery and engineering,environmental protection,conveying equipment and automatic control systems.     

China''''s National Oil Reserve Center was Born

Aseries of events that occurred in October 2007, are rewriting the history of China's energy industry: November 3 an Energy Law Committee asked the public for suggestions on improvements; forty top experts came together to form the National Energy Expert Advisory Committee on November 6; and the National Oil Reserve Center (NORC)became the nerve centre of oil reserves on November 18. Yet, behind the progress of these recent activities remains the fact that international oil prices still hover around a very high price of US$ 90/barrel, and China's oil imports are close to accounting for half of its total oil reserves.     

2007 China Harbor Ten People

2007 China Harbor Ten People elected the entrepreneurs who contributed a lot to port economy and enterprises this year trough their talent management.These ten people embody their social responsibility,professional skills,creative ability,and charming personality.Bearing full confidence in China＇s port economy,the port entrepreneurs are brave enough to explore a brand new area,so as to promote harbor economic development. At the very beginning of 2008,China Shipping Website,Dalian Maritime University,and China Port and Shipping In- stitute jointly select the 2007 China Harbor Ten People,demonstrate port entrepreneurs＇ stunning minds,disclose their secrets to success,and providing abundant experiences to others in harbor development.The top ten people are various excellence during the ups and downs harbor development.     

Sony Style in China

Since the normalization of the diplomatic ties between China and ） Japan, the bilateral economic relations have deepened continually. According to the statistic of Japan, China passed U.S. to become Japan＇s top trade partner as well as is the second largest export market for Japan and is the largest import resource for Japan. Japan companies such as Mitsui, Sumitomo, Sony and Panasonic, have set the subsidiaries in China and explored their scales. This year 2008 marks the 30th anniversary of the signing of the ChinaJapan Treaty of Peace and Friendship.     

China''''s Import and Export of Textiles and Apparel in the Q1

China's textile and apparel industry suffered an unprecedented cold market for exports in the first quarter this year,the result of a few factors including: the appreciating RMB, decreasing export rebate rate,expanding influence of the U.S. subprime crisis, increasing costs of production and rising labor cost.     

Financial Services for Post-Quake Reconstruction

The May 12 earthquake in Sichuan caught Chinese people by surprise and took the nation＇s heart. While mourning the dead and searching for the missing, many services must be provided for the survivors in the wake of the earthquake. Available post-quake financial services have become an important part of the reconstruction effort in the disasterstricken areas of Sichuan province.     

The Frankenstein Syndrome: The Creation of Mega-Media Conglomerates and Ethical Modeling in Journalism

Aristotle saw ethics as a habit that is modeled and developed though practice. Shelly's Victor Frankenstein, though well intentioned in his goals, failed to model ethical behavior for his creation, abandoning it to its own recourse. Today we live in an era of unfettered mergers and acquisitions where once separate and independent media increasingly are concentrated under the control and leadership of the fictitious but legal personhood of a few conglomerated corporations. This paper will explore the impact of mega-media mergers on ethical modeling in journalism. It will diagram the behavioral context underlying the development of ethical habits, discuss leadership theory as it applies to management, and address the question of whether the creation of mega-media conglomerates will result in responsible corporate citizens or monsters who turn on their creators.