移动通信发展的现状及未来趋势研究

随着电子技术的发展,尤其是计算机技术、集成电路、半导体的发展,促使移动通信得到了迅速发展。本文,概述了移动通信的发展历程,论述其当前发展的现状,并对移动通信未来趋势进行分析,以为移动通信的进一步发展提供参考。     

农村移动通信市场的细分与营销策略分析——以吉安市为例

农村移动通信市场的发展是农村经济腾飞的重要保证之一。我国农村市场移动通信市场发展正当时。本文结合江西省吉安市具体情况阐述了农村移动通信市场的特征,分析了制约农村通信市场发展的因素,进行了农村移动通信市场的细分,提出一定的营销策略。     

移动通信技术现状分析

宽带移动通信技术在科学技术水平发展的同时不断进行更新换代,而经济的发展一直以来都对宽带移动通信的发展提出了更高的要求。当前,移动通信技术主要体现在业务多样化、传输宽带化、网络化和体制并存化。当前,第三代宽带移动通信技术发展正处于繁荣发展阶段,但是为了满足经济发展对于宽带移动通信的要求、移动宽带数据业务对于宽带移动通信传输速度的要求,那么如何设计与开发出传输速度更快、效率更高、性能更为优越的宽带移动通信技术已经成为了社会各界所共同关注的热点话题。在如此的现状之下,宽带移动通信产业的技术现状与前景发展的分析成为了研究的重点内容。     

基于云计算技术的移动通信网络优化策略

在当前信息技术发展环境下,网络智能化逐渐普及在人们的日常生活和工作中,移动通信技术的发展给人们生活带来了更多的便利。在云计算技术发展环境下,进一步促进移动通信网络的发展,有助于显著提高移动通信网络服务质量。本文对云计算技术下的移动通信网络优化策略进行分析。     

4G移动通信技术解读

当今世界移动通信技术飞速发展，移动通信市场不断繁荣。移动通信未来的发展及演进问题成了世人关注的热点。本文介绍了第四代移动通信发展演进和所采用的核心技术，并提出了第四代移动通信发展所面I临的问题和挑战。     

浅谈第四代移动通信技术及发展趋势

本文介绍了中国移动通信发展的现状,分析了第四代移动通信技术定义、特点及核心技术,最后对第四代移动通信系统的发展进行了展望.     

浅析移动通信基站的建设与维护

移动通信基站的建设是我国移动通信运营商投资的重要部分，移动通信基站的建设一般都是围绕覆盖面、通话质量、投资效益、建设难易、维护方便等要素进行。随着移动通信网络业务向数据化、分组化方向发展，移动通信基站的发展趋势也必然是宽带化、大覆盖面建设及IP化。本文提出了基站建设、规划思路，在解决移动通信系统网络规模性发展的同时，也与当前社会和谐建设的主题相呼应。     

基于嵌入式linux的移动通信终端的研究

随着移动通信技术的发展,具有导航、定位功能的移动通信终端的应用也日益广泛.本论文针对基于导航、定位功能的移动通信终端,采用linux嵌入式系系统开发设计,在分析选择了移动通信模式的基础上,对移动通信终端进行了开发设计,给出了具体的软硬件设计方案.对于推动多功能的移动通信终端的研究、普及和应用具有一定的实践参考价值.     

未来无线移动通信系统与网络

分析了未来通信业务和通信网络的发展趋势,提出对第四代移动通信系统开展研究,对无线移动通信系统和网络的发展提出了一些看法。提出了一种未来无线移动通信系统的设想,并对其中的关键问题进行讨论。     

未来移动通信技术的发展与挑战

移动通信技术的飞速发展带来移动通信市场不断繁荣。移动通信未来的发展及演进问题成了世人关注的热点。本文介绍了第四代移动通信的前景和所采用的核心技术,并提出了第四代移动通信发展所面,临的问题和挑战。     

第三代移动通信国际标准的确立及其演进策略

以移动通信发展进程中2G所面临的问题为背景，介绍了ITU通过的包括我国TD－SCDMA提案在内的第三代移动通信国际标准，并在比较3G主流技术的同时简述了TD－SCDMA的特点，提出了我国2G向3G演进的方案及其相关思考。     

面向5G的小蜂窝网络研究综述

超密集组网的小蜂窝网络将是解决人们对更高无线通信服务需求的重要技术。总结了5G的发展愿景及对应的关键技术，分析了小蜂窝网络在未来无线通信系统中所承担的重要作用和面临的挑战，并给出了对应的解决思路，提出了解决认知小蜂窝网络与宏网络共存时上/下行通信所面临问题的解决方案。相关内容和建议可为小蜂窝网络的进一步发展提供明确的参考。     

Development of size labelling systems for women's garments

This paper reviews the development of size labelling systems for women's garments sold in the U.S.A. The review shows that three trends are evident: (1) a continuous decrease in the numerical codes of sizes; (2) an emphasis on large and petite sizes; and (3) the introduction of split sizes. Problems with the size labelling systems currently in use in the U.S.A. are also discussed. A survey of consumers' preferences regarding various size labelling system is recommended.     

GSM向3G演进系统安全的改进

介绍了GSM向3G过渡时期GSM用户的认证与密钥协商过程，分析了GSM用户对3G系统的安全威胁，并对GSM用户接入3G系统提出了改进认证与加密算法。它可以有效防止攻击者假冒合法GSM用户滥用UTRAN网络资源，并可以保证用户的通信安全。     

Value network dynamics in 3G–4G wireless communications: A systems thinking approach to strategic value assessment

This article develops a map to analyze the dynamic forces that influence the structure and development of 3G (third generation) wireless communications value networks. The analysis builds on the Strategic Value Assessment Model (Fine, et al. [Fine, Charles H., Vardan, Roger, Pethick, Robert, El Hout, Jamal. Rapid-Response Capability in value chain Design. MIT Sloan Manage Rev 2002, 43(Winter): 69–75.]) and utilizes a qualitative System Dynamics mapping approach. The map focuses on the driving forces affecting user adoption of 3G services, focusing on customer dynamics, competitive dynamics, and technology dynamics. To analyze adoption of 3G services by customers, the articles maps the dynamics of (1) network investment and user population, (2) entry of service innovators as well as price competitors, (3) the effects of positive network externalities arising from a larger user population, (4) price compression as lower willingness-to-pay users adopt 3G services, (5) scale economies in terminal costs and prices, and (6) new content development as a draw to new users. Applying inductive systems diagrams hypotheses are integrated into a causal loop map and tested with data collected at 15 communications-industry workshops attended by 190 participants in Europe. The map aims to deepen the understanding of the possible evolutionary paths of the 3G wireless value network. The article seeks also to assess which future scenarios are plausible and what dynamic triggers might make them likely.     

人工智能在我国公共卫生建设中的应用与思考

新冠疫情的暴发以及长期防治对中国的公共卫生体系造成深远影响,给我国突发公共卫生事件应急与防控机制带来巨大的考验。在疫情防控的过程中,信息化技术为传统医疗机构带来瞩目的帮助与改变,人工智能、大数据、5G高速网络等新兴高科技的蓬勃发展在直接提升医疗水平方面表现出巨大潜力。本文就人工智能在疫情期间的医疗辅助功能展开讨论,并对未来我国公共卫生体系的建设进行了思考。     

Demand pull and technology push perspective in technology-based innovations for the points of sale: The retailers evaluation

Despite the consumers' increasing demand of technology-based innovations for making stores more appealing and the huge availability of advanced technologies, there is still a lack of research on the retailers' and employees' points of views towards the introduction of these systems. In fact, an efficient innovation should take care of both the final users/consumers' and the retailers/employees' needs and expectations. Hence, the aim of this study is to advance our knowledge on retailers' pull of new technologies for improving their job in accordance with the most recent systems, as well as on the main characteristics of these innovations for defining a new integrative framework of analysis and development.     

Economic Partnership Agreements Between Sub‐Saharan Africa and the EU: A Development Perspective

This paper draws on Hinkle and Schiff (2003). It analyses the planned Economic Partnership Agreements (EPAs) between the EU and Sub‐Saharan Africa (SSA) from a development perspective. It does not take a position on whether SSA should enter into EPAs with the EU. Rather, it starts from the notion that the process of forming EPAs is unlikely to be reversed and examines the conditions that will maximise SSA's benefits from the EPAs. If this notion is correct, then the analysis presented in the paper applies. On the other hand, Pascal Lamy, the EU Trade Commissioner, made a proposal at the May 2004 G‐90 summit in Dakar that might lead to a change in the EPA process. He proposed that the G‐90, a group consisting of ACP and non‐ACP LDC countries, should not have to make concessions at the WTO Doha Round of multilateral trade negotiations, i.e., he proposed a ‘free round’ for the G‐90. This proposal opens the door to the possibility that the same might apply to the ACP countries in the EU‐ACP negotiations and that the EPA process might be reversed. The paper considers the key issues raised by the planned EPAs, their relationship to the WTO's Doha Round and the EU's Everything‐but‐Arms Initiative, the changes needed to make the EPAs internally consistent, the domestic reforms in SSA that would need to accompany trade liberalisation in both goods and services, and the potential effects of the EPAs on regional integration in SSA. The EPAs will pose a number of policy challenges for SSA countries, including: restructuring of indirect tax systems, reduction of MFN tariffs, liberalisation of service imports on an MFN basis and related regulatory reforms in the services sector, and liberalisation of trade in both goods and services within the regional trading blocs in SSA. The paper also finds that the EPAs provide an opportunity to accelerate regional and global trade integration in SSA. To realise the potential development benefits of the planned EPAs, two steps are essential. First, the EU must, as it has stated, truly treat the EPAs as instruments of development, subordinating its commercial interests in the agreements to the development needs of SSA. Second, the SSA countries need to implement a number of EPA‐related trade policy reforms. However, the latter is far from certain, given the lack of reform momentum in SSA.     

基于OBSAI规范的3G数字直放站设计

分析了3G数字直放站的功能结构,并重点分析了工业界提出的基站与直放站接口规范,最后结合OBSAI规范的要求介绍了数字直放站的设计方案.本方案的射频和中频部分采用专用芯片,接口规范的实现采用FPGA,这样能用相同的硬件兼顾多种接口标准.与模拟直放站相比,该方案具有高性能、低成本的优点,适合3G网络的广泛覆盖建设.     

China's foreign trade marketing strategy: Problems and prospects 1

It has been seven years since the open door policy was officially instituted by the People's Republic of China. During this time, changes have taken place within Chinese society and China's dealings with the rest of the world. In this paper, the authors evaluate the problems and prospects for China's foreign trade marketing strategy. They make recommendations in five policy areas: (1) export promotion; (2) the mix of exports; (3) a systems approach to trade; (4) joint ventures stressing value‐added labour and (5) the role of assembly technology. Each strategy is identified and discussed in terms of its future prospects in the development of China's trade.