无线移动图像传输系统研究

随着通信技术的不断发展,各类突发事件的处置难度日益增大,对突发事件现场各类图像信息的需求也越来越大,因此,在处置重大安全事故、群体性事件、恐怖袭击、自然灾害等公共安全重大突发性事件的公安应急通信中,无线移动图像传输系统发挥着越来越重要的作用。文章分析并介绍了其自行设计的基于自由空间光传输的无线移动图像传输系统,介绍了该系统的工作原理和结构组成,并说明了实现该系统的几项关键技术。该系统能够实现在应急状态下完整的无线通信,对及时了解突发事件现场的实况,实现实时指挥,增强快速反应能力和突发事件的处置能力具有一定的实用意义。     

公安应急移动图像传输技术——公安应急移动图像传输技术

本文简要阐述了公安应急通信对移动图像传输的必要性，明确了公安应急通信对移动图像传输的要求；阐述了移动图像传输的基本技术；提出了公安应急图像传输的一些解决方案，可供各地公安部门在移动图像传输应用中参考。     

移动图像传输设备

近年来,随着无线通信技术和视频技术的发展,以及数字移动电视技术的成熟应用,图像传输开始成为应急指挥通信的重要内容,各种大型活动及各类突发事件现场视频信号的实时采集和显示,逐渐成为应急指挥通信的必备要求。     

公安应急移动图像传输技术

本文简要阐述了公安应急通信对移动图像传输的必要性,明确了公安应急通信对移动图像传输的要求;阐述了移动图像传输的基本技术;提出了公安应急图像传输的一些解决方案,可供各地公安部门在移动图像传输应用中的参考.     

移动图像传输的成功应用——北京市公安交通管理局指挥通信车系统介绍

北京市公安局公安交通管理局将移动图像传输成功应用到实际工作中，为提高交通管理快速反应能力和综合处置能力，做好处置突发事件和重大活动、大型集会的现场应急通信，特别为2008年北京奥运会道路交通通信保障做出了重要贡献。     

浅谈单兵无线图像传输技术的应用特性

从冰雪灾害到5．12地震救援，从北京奥运会保障到神七飞船返回，无线图像传输技术已经作为一种必备通信方式应用在事故救援、重大事件现场保障等活动中。其中，单兵无线图像传输技术将应急现场图像进行采集后及时传输，以其机动灵活的特点发挥着越来越重要的作用，已经成为一种必不可少的通信保障手段。本文就单兵无线图像传输技术的发展及应用要求，从射频特性、图像质量、传输距离、人机界面、便携特性、应用环境等方面进行分析，阐述单兵无线图像传输技术的应用特性。     

构建综合移动无线图传系统的探讨

发展无线移动图像监控和语音数据传输是提高公安机关重大活动安全保卫、突发事件处置和巡逻处警快速反应等能力的必然要求。要以覆盖重点区域的无线主干网络为基础，以高速延伸的无线网桥为桥梁，以多样实用的移动设备为触角，辅助以灵活移动的无线基站，构建起无线移动图传系统。     

LDPC-COFDM系统在警用移动通信中的应用

在分析正交频分复用技术基本原理的基础上,结合LDPC码技术特点,介绍了LDPC-COFDM系统的工作机制,讨论LDPC-COFDM应用于移动图像传输系统的优势及其技术实现问题,提出了一种基于LDPC-COFDM系统的警用移动通信系统模型。该模型适用于复杂地理环境及突发事件环境下的移动图像数据传输技术需求,具有良好的移动通信效果,为安保人员完成特定任务提供可靠、高效的数据传输支持。     

警用移动通信数字化探讨

九十年代移动通信技术在国内外得到了迅速发展。蜂窝移动电话、集群通信、无绳电话、无线寻呼、个人通信、移动卫星通信等百花齐放，各显神通。移动通信之所以能如此快速的发展，原因有三：一是需求推动了市场发展；二是信息交换需要快速传输；三是技术进步促成了通信产业的迅速发展，特别是微电子和计算机技术的突破，为通信设备的微型化、智能化、实用化奠定了基础。在通信产业的发展中，数字化技术得到了长足的进步，通信数字化已成为大家的共识。一、数字化是通信发展的必然趋势随着人们交换信息量的日益增长与频繁，通信的需求急剧增长…     

浅析地面数字电视传输技术在公安工作中的应用

现有的宽带无线数字视频传输技术多种多样,如何将它们应用于公安实战中是一个亟待解决的问题。本文通过对比各种先进的宽带无线视频传输技术,并结合公安工作的实际应用,大胆的提出利用地面数字电视传输技术解决公安等强力部门对于移动图像传输的需求,并通过试验论证技术应用的可行性。     

Managing Money Online

正Internet financial products have enjoyed huge success,but will they change the landscape of China’s financial sector?Wang Kang,27,works for a Beijing branch of the Industrial and Commercial Bank of China(ICBC),a major state-owned commercial bank in China and the largest bank     

International Reactions

正China Chinese State Councilor Yang Jiechi severely criticized Japanese Prime Minister Shinzo Abe’s visit to the Yasukuni Shrine,calling it a brazen affront to people of all countries that suffered from Japanese aggression and colonial rule.     

PEOPLE

正"Reading books gives you access to the knowledge and culture of the people of different countries.The main problem facing China and Turkey in the field of literature is the lack of translated books."Chinese writer and Nobel laureate Mo Yan,calling for more translated literature works at a news briefing in Istanbul on February 22     

NUMBERS

正58 Number of approval items that the State Council canceled or delegated to lowerlevel governments to streamline administration on November 24 $2.3 blnvalue of agreements signed between businesses from Singapore and east China’s Zhejiang Province at the 10th SingaporeZhejiang Economic and Trade Council meeting held in Singapore on November 24 4% Decrease in business revenues in China’s telecom sector in October     

WORLD

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A White-Hot Battle

正Backing a price war between cab-booking apps serves the larger ambition of China’s Internet companies Han Yonghui is a cabbie in Beijing.After a taxi fare increase in 2013,he makes roughly 5,000 yuan($823)a month,just about enough to feed his family.Recently,Han started using cab-hailing mobile software to pick up customers who order taxis via smartphone.Benefiting from an increasingly fierce competition of rewards between two of the most popular apps for this purpose,he can receive up to 2,250 yuan($370)     

ThePolitical TricksofAbe

正Japan’s leader hopes to salvage his power by way of an early election Japanese Prime Minister Shinzo Abe dissolved the House of Representatives,or the lower house in the country’s bicameral parliament,on November 21.A consequent snap election will be held on December 14,two years ahead of schedule.In recent months,the Japanese economy has continued to slide and entered a technical     

Mid-Term Misfortune

正Barack obama strives for a sound legacy Predictably,the U.S.Republican Party(GOP)took back the Senate after eight years in a landslide victory during the mid-term congressional election in November.While the GOP is still in control of the House of Representatives,it also gained ground in state governor elections in Illinois,Maryland,Iowa and Colorado—the traditional spheres of influence of the Democrats.     

Chinese Machinery Maker Explores overseas Market

正The 15th Russia International Show of Construction Equipment and Technologies(CTT)was held in Moscow from June 3 to 7.Liuzhou OvM Machinery Co.Ltd.attended the exhibition with its prestressed products."At the moment,infrastructure construction such as housing,elec-tric power and railway is continuing to expand in Russia,and given that the country’s import of machinery     

Doing Justice To the Past

正China has declared Japanese Prime Minister Shinzo Abe an unwelcome visitor following his recent visit to the controversial Yasukuni Shrine.When asked whether Chinese leaders would listen to his explanations for the shrine visit in person,a Foreign Ministry spokesman ruled out the possibility by saying that Abe has"shut the door"on dialogue.China is not alone.The U.S.State Department also expressed disappointment at Abe’s visit