2,360 research outputs found

    Research and Design of High Isolation multipolarization MIMO Antennas

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    无线通信行业的蓬勃发展带来了频谱资源的日趋短缺,在现有的频谱资源上提高通信系统的传输速率和传输质量成为通信领域的研究重点。MIMO(Multiple-InputMultiple-Output,多入多出)可以在不增加发射功率和传输带宽的前提下,显著地提高系统的信道容量和频谱利用率,MIMO技术被认为是新一代无线通信系统中的革命性技术。当前,天线问题是限制MIMO技术发展的最大障碍之一。 本文在介绍MIMO天线的研究背景和意义,以及综述近年来国内外MIMO天线发展现状的基础上,对MIMO天线的相关理论和性能指标进行了归纳。重点讨论现有的几种提高MIMO天线单元隔离度的方法,为MIMO天线的设计奠...The rapid development of wireless communication technologies has brought a growing shortage of spectrum resources. Improving the transmission rate and the communication quality in this restricted condition then become the research focus of communication technologies. MIMO (Multiple-Input Multiple-Output) technology, which is considered to be the revolutionary technology of the next generation wire...学位:工学硕士院系专业:信息科学与技术学院_电磁场与微波技术学号:2312012115286

    Design and Implementation of the Map Analysis System For The Car Market based on GIS

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    中国汽车的庞大市场规模带动车险市场的快速增长,购买车险已经成为人们日常生活的讨论话题之一。随着车辆保险市场的快速增长,车辆保险行业的竞争强度也越来越大。如何在市场竞争中立足,是保险公司必须考虑的重点问题,而4S店也成为了各保险厂商的兵家必争之地。目前各保险厂商都与4S合作,派出车险销售团队进驻4S店,从源头抢占客户资源。保险行业是数据高度密集的行业,在业务过程中,会产生大量的客户资料数据和交易数据,而使用计算机对保险数据进行处理和统计分析是近年才普及的手段,限于当时的技术发展水平,造成了一个个“信息孤岛”,导致车险从业人员无法在一个系统中全面直观的了解4S店保险业务的销售情况,因此,非常有必要...The huge car market in China brings the rapid development of car insurance. Currently, Car Insurance has been one of the hottest word in daily life. With the fast growth of car insurance market, the competition has been more and more intense. Insurance companies should focus on how to stand out on the fierce market and 4S stores have been the targets. Currently, varius insurance companies cooperat...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323231

    Study of Urbanization Level Measurement and Disparity in China

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    改革开放以来,我国的城市化进入高速发展时期,各个省区大中城市的建设取得了显著的成就。与此同时,“城市化”问题也一直受到学界的广泛关注。经济学家们从经济、政治、文化等等角度对我国的城市化问题进行了研究,并提出了促进其发展的政策建议。但是,在现有的研究我国城市化发展的文献中,大多都集中在分析我国城市化发展的道路、城市化进程、模式等这些方面,而对于城市化发展水平的差异则研究较少,而从空间角度对我国省区城市化水平差异的原因及动力的探索则更为鲜见。 我国各个省区经济发展水平上存在很大差异,产业结构、主导产业的发展也不在同一层次上。再加之社会、文化、历史等诸方面原因,各个省区的城市化发展水平就不可能有统...The urbanization of our country shows an unprecedented speed and many large cities have got remarkable achievement in the process of urbanization. Also, it attracts a lot of attention from the field of academia. Economists have done lots of researches in the urbanizations of China, with the viewing angle of economic、politics and culture. They have brought forwards some further suggestions. We can...学位:经济学硕士院系专业:经济学院计划统计系_统计学学号:20041002

    A Research Into Crime Of Forcible Seizure

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    内容摘要本文试图对抢夺罪的定义,构成要件、转化定罪及司法认定和立法缺陷及完善等五个问题进行深入的探讨,并在此基础上提出一些自己的见解。本文第一章对我国抢夺罪的立法情况做了分析和探究,同时分析当前我国抢夺罪的现状.本文还对其他国家和地区的关于抢夺罪的立法情况,具体法律条文做了论述并做了比较分析。指出各国和地区刑事法律规定对抢夺犯罪是一致予以惩处的,但由于立法上差异,有的设置为独立罪名,有的则通过裁判解释将抢夺行为扩张解释为有关罪名的表现形式。抢夺罪实际上介于抢劫罪和盗窃罪之间的犯罪形态,因此对抢劫罪“暴力”程度的限定不同和对盗窃是否规定为“秘密窃取”,使得抢夺罪的外延也存在宽窄之别。第二章分析了...ABSTRACT This article attempts to carry on a deep discussion for the Crime of Forcible Seizure from the following five aspects: definition、constitution、transformation、legislative defect and improvement, then putts forward the author’s own opinions on this basis. Chapter one makes an analysis on legislative situation of the Crime of Forcible Seizure in China, and analyzes current situation o...学位:法律硕士院系专业:法学院法律系_法律硕士(JM)学号:X20010813

    The Study on In vivo Biocompatibility & Biodistribution of Several Nanoscale Materials

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    纳米生物材料进行生物相容性评价是纳米生物材料能否进入临床研究的关键环节。本论文研究内容是对纳米Au、Au-Au2S和明胶—硅氧烷的体内生物安全性和生物分布进行了评价,研究结果如下: 1.病理切片实验证实100mmol不同粒径(12nm、20nm和50nm)和不同形状(球状、立方体、棒状和菜花状)纳米Au不会造成组织免疫或炎症反应。在生物分布方面,纳米Au主要沉积于肝脏和脾脏等内皮网状系统,透射电镜观察到有团聚发生。在肺和肾脏也有少量分布。器官分布和体内残留量与时间、尺寸及形状有很大关系。 2.我们合成了近红外敏感的药物释放载体Au-Au2S纳米颗粒,并对其和载顺铂的cisplatin-lo...Biocompatibility evaluation of nano-biomaterials is the key step to enter clinical study. This paper was evaluating the in vivo biocompatibility and biodistribution of Au, Au-Au2S, and gelatin-siloxane nanoparticles. The results were as follows: 1. We confirmed that 100 mmol Au of different size and different shapes induced no immune or inflammatory response. The biodistribution, which as a close...学位:工学硕士院系专业:医学院生物医学工程研究中心_☆生物医学工程学号:20044500

    Research and analysis on the tax impact of the reform program to replace BT with VAT on mining industry—Take enterprises in Sanming city,Fujian Province for example

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    “营改增”改革是我国近些年来的一项重大财税改革,其所产生的影响积极而深远。自实施“营改增”财税改革以来,其不仅对“营改增”的行业带来了较大幅度的结构性减税、促进制造业和部分现代服务业的转型升级等诸多利好,同时也给一些原来就征收增值税的非“营改增”行业带来了一些影响。分析、研究“营改增”改革以来对原就征收增值税的非“营改增”行业的影响,不仅可以对“营改增”的深入研究,也可以更加全面、客观评价实施“营改增”的效果,在健康、全面推进我国“营改增”的同时,促进这些非“营改增”行业更好的发掘一些改革红利和进一步完善相关的税制。 本文以调查分析为主,回顾了改革的理论基础和具体实践,接着阐述了改革对财政税...The replacement of Business Tax with Value-added Tax is a major reform of finance and tax recent years in China. Its latent and positive impact has attracted our attention. This reformation was significantly resulting in structural tax cuts for the reformational industries, promoting the transformation and upgrading of the manufacturing industry and part of modern service.It bring some impacts for...学位:税务硕士院系专业:经济学院_税务硕士学号:1552012115181

    Study on electronic channel operation strategy of China Mobile

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    本文主要研究中国移动通信电子渠道运营策略,通过对移动通信行业背景、竞争趋势,分析了通信行业客户、业务和市场的发展趋势,指出移动数据业务将作为运营商下一步重点发展战略,并分析了全业务竞争环境下中国移动渠道运营的方向,同时说明中国移动实体渠道运营上的存在一定短板,在剧烈的市场竞争中,实体渠道转型势在必行,并阐述电子渠道是未来运营商发展的主要方向;同时对中国移动电子渠道现阶段发展情况进行说明,指出实体渠道和电子渠道定位,及目前电子渠道在运营商前期发展下,已经初具规模,下阶段的目标是进行一体化精细运营,提升效率。 本文在研究方法上采用了SWOT、长尾理论、对比分析法等进行研究,结合竞争对手电子渠道的...The paper looks into the electronic channel operation strategy of China Mobile. After analyzing mobile communication industry background, competition tendency, and the development trend of communication industry channel, it points out development direction for China Mobile’s channel operation under converged (full)service competition circumstance, describes the short boards in China Mobile’s concr...学位:管理学硕士院系专业:管理学院工商管理教育中心(MBA中心)_工商管理硕士(MBA)学号:X200515502

    The Transformation of Chinese Language Education in Thailand after World WarⅡ

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    华人移居泰国有着悠久的历史,泰国华侨华人社会在华人不断涌入的基础上逐渐形成。作为海外华侨华人社会重要支柱的华文教育在泰国也经历了从无到有的发展过程。18世纪晚期,泰国出现了华文学校的萌芽。泰国近代华文学校出现于20世纪初,从此,泰国的华文教育步入了正轨。然而,大泰主义的兴起让华文教育蒙受了巨大的挫折。 战后,泰国华文教育经历了短暂的复兴,但大泰主义复活、冷战思维的影响以及泰国政府长期贯彻的同化政策严重抑制了华文教育。中泰建交改善了两国关系,但却无法改变华文教育走向式微。 长期的同化政策使得大部分华侨归化当地,华文教育的性质随之由母语教育转变为外语教育。1992年,冷战结束缓和了国家之间因意...Chinese had long history of migrating to Thailand. Overseas Chinese community in Thailand endured a process from formation to growth, so did the development of Chinese language education in Thailand, which has become one of the significant pillars of overseas Chinese community. In the late 18th century, Thailand had the embryonic form of Chinese schools and modern Chinese schools in Thailand appea...学位:历史学硕士院系专业:南洋研究院_专门史学号:2602005130261

    Sichuan,China United Cement integrated of the Department of Operation Management District Marketing strategy planning

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    随着我国国民经济连续多年高速稳定发展,中国水泥工业也得到了前所未有的快速发展,尤其是南方水泥、海螺水泥、中国联合水泥、冀东水泥、华新水泥等一大批大型水泥企业集团近几年来不断实施规模扩张、技术进步、节能减排等战略发展规划,整个水泥行业的结构调整得到了明显改善。企业营销战略是企业战略发展的核心竞争战略,其研究和应用在大型水泥集团中得到了充分的实施,并通过营销组织和营销策略的有效运作,转化为了现实的生产力。 本文运用厦门大学EMBA学习过程中学到的知识、研究方法和对四川水泥市场的熟知程度,对中国联合水泥四川运营管理区水泥区域市场进行严谨的内外部环境研究分析和SWOT分析,并在此基础上,运用战略管理...With the rapid and steady development of our national economy for years, China cement industry has also undergone unprecedentedly rapid development. Particularly due to the fact that large cement enterprises, such as the Southern Cement, Conch Cement, the United China Cement, Jidong Cement, Huaxin Cement and so on, recently have initiated strategic development plans including the expansion, techno...学位:工商管理硕士院系专业:管理学院高级经理教育中心(EMBA项目)_高级管理人员工商管理硕士(EMBA)学号:X200615616
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