Research on UWB-MIMO Antenna Based on Left-handed Material Unit

UWB-MIMO天线同时具备了超宽带技术超高数据传输速率、极大系统容量、低成本、低功耗等多项优点以及多输入多输出技术信道容量大、频谱效率高等卓越性能，因而吸引了天线设计领域的广泛关注与研究。左手材料具有很多天然材料无法比拟的电磁特性，应用不同结构的左手材料单元，对增加天线多频特性、提升增益、拓展宽带、改善辐射方向性等性能提供了更广阔的设计途径。本论文旨在研究UWB-MIMO天线设计中超宽带天线单元、陷波结构、去耦结构等，特别是左手材料单元结构在其中的应用，设计了一系列基于蝶线形结构的左手材料单元，提出了几款结合左手材料单元结构，实现陷波功能、高隔离度、小型化等特点的UWB-MIMO天线。 主...UWB-MIMO antenna not only has UWB technology with high data transmission rate, great system capacity, low cost, low power ,but also with good performances in huge channel capacity, high efficiency of MIMO technology.Thus it is playing an increasingly important role in the modern wireless communication system and has aroused extensive attention and research. Left-handed materials (LHM) and other em...学位：工程硕士院系专业：信息科学与技术学院_工程硕士(电子与通信工程)学号：2312014115311

Marine Ecological Civilization Assessment：A Case Study of Xiamen City

海岸带是海洋文明的发源地，是人类认识地球基线和海陆交互的界面，也是海洋生态文明建设的核心区域。海岸带地区的人口、资源、环境与社会可持续发展面临诸多问题，如何在当前全球变化和城市化进程加大的双重影响下得到有效解决，以协调它们之间的相互关系，成了建设海洋生态文明的重点内容与首要任务。开展海洋生态文明的评价研究，有助于我们了解海洋生态文明发展的状态、趋势及其存在的问题，为合理开展海岸带综合管理、引导海洋生态文明建设提供科学依据。本研究在总结相关理论与实践的基础上，剖析海洋生态文明的内涵，提出了海洋生态文明评价新思路，构建了海洋生态文明评价体系，并以厦门为例，进行探索性应用。主要研究成果如下： 1）...As the origin of ocean civilization, coastal zone becomes the starting point where humans learn the Earth and the interactive interface between the sea and land, as well being the core areas of marine ecological civilization. A great number of problems, however, have arisen under the influence of global environmental change and increasingly rapid urbanization process as to the population, resource...学位：理学硕士院系专业：海洋与地球学院_海岸带综合管理学号：2242011115135

台湾文学研究的区域文化视角——试评朱双一新著《闽台文学的文化亲缘》

从“文化”的角度来考察文学是近年来学术界从事文学研究的一个重要切入点和研究视角。文化研究的好处在于,它不仅为文学研究开阔了视界,而且也使得文学研究进入了一个更深的文化层面。但与此同时,整体性的文化研究对于研究者的素质和功力都是个很大的考验。因为文化研究的涉及面极其广大,政治、经济、历史、宗教、民俗、语言等无不包括在内。面对浩如烟海的资料,研究者如何从中

试论台湾《文学杂志》对新批评的介绍和运用

1 956年夏济安等创办纯文学刊物《文学杂志》 ,力图扭转以文学为宣传工具的文坛风气 ,在深入挖掘传统文学资源的同时 ,也注重对西方现代主义的译介 ,率先将英美新批评引入台湾文坛 ,对现代主义的崛起发挥了重要作用。它有选择地介绍符合于自己“朴素、清醒、理智”追求的早期新批评 ,并将其运用于古典或现代作品的具体分析中 ,取得令人耳目一新的效果 ,对台湾文学批评具有示范作用。在新批评于中国大陆长期缺席的情况下 ,此举展示了新批评实际应用于中国文学研究的一种可能

Real-time evaluation model for the transmission quality of under water image

基于VQM客观评测模型体系,提出了一种适合水声及无线信道传输的实时图像质量评测模型。模型基于三个分项参数(结构损伤、空域边缘能量增加、空域边缘能量损耗)描述水下图像传输中压缩图像和非压缩图像的典型劣化特征。通过这三个分项参数,可有效地评测水下图像的劣化程度,统计实验表明,本实时评测模型具有较好的评测准确性、单调性和一致性。同时,模型利用了奇异值秩可压缩性,进一步压缩了参考特征的信息量,节约了实时评测所需的信道资源,为实现实时评测的业务评测目标提供了新途径。研究表明,本方法占用的额外信息开销不超过数据信息量的3%,对于水声信道、无线信道等资源受限的实时评测应用具有实用价值。此外,论文设计了基于面积理论的质量网图模型,通过网图的开闭程度,形象直观地反映图像质量的好坏,克服了传统方式在评测结果表达中存在的综合分物理意义不明确等缺陷。本实时评测模型可应用在水下监测、海底勘探等水下图像通信场合,具有较好的应用前景。The paper proposes a real-time image quality evaluation model, which is based on the VQM quality evaluation system.The model is suitable for underwater and wireless applications.The model adopts three parameters, i.e.structure error, energy augment and energy expense, to describe the distortion of the compressed or uncompressed images; and the evaluation model has good evaluation veracity, monotonicity and consistency.The model also takes the advantage of compressing the order of the singular value, which reduces the information of the reference feature, saves the channel resource and provides a new approach to realize real-time evaluation.Research shows that the additional signal cost does not exceed 3% of the total information, so this method is suitable for the applications like underwater acoustic communication or wireless communication with limited channel resource.Besides, the paper also proposes a model that uses triangle image to express the image quality, which overcomes the shortcoming of the confusion in quality score.Experiment shows that the proposed model could be widely used in underwater image communication applications, such as underwater inspection, sea exploration and so on.福建省自然科学基金“青年科技人才创新项目”(2009J05154)资

New Method for Temporal Information Detection of Video Quality Assessment

针对视频质量评测中时域信息的检测方法,本文提出了新的计算方法。该方法根据AnSI T1.801.03-1996和ITu-T rECOMMEndATIOn P.910时域信息(TI)的概念定义和方法推荐,采用先对时域梯度图求直方图,再在所求直方图的基础上进行统计计算的方式,克服了直接进行时域梯度rMS计算带来的乘法运算量与画面像素数成正比从而导致耗时较多的缺陷。实验结果表明,采用本改进方式的乘法运算量仅取决于直方图的灰度级,而与具体像素数无关,在同等条件下的平均计算效率可提高约三倍,且对时域信息的检测效果与推荐方法相仿。该方法实现简单,易于集成,在视频质量评测应用中具有较好的推广价值。Concerning about the Temporal Information(TI) detection for video quality assessment,a new method is proposed based on the definition and algorithm recommended by the ANSI T1.801.03-1996 and ITU-T Recommendation P.910.At first,image of the temporal derivative would be changed into the histogram domain,and then the statistic calculation(RMS and so on) was done for the temporal information.The drawback of the conventional method was overcome whose workload would increase greatly with the increase of the number of the pixel in scene image.Experimental results show that the computation complexity is dependent on the gray level of histogram,but is independent of the number of the pixel by the new method.In the same experiment condition,the computational efficiency is improved three times while the performance is similar to the conventional method.The algorithm is so simple and feasible that it could be used for the application of video quality assessment.福建省自然科学基金青年科技人才创新资助项目(2009J05154

Quick estimation of end to end PQoS of image

本文介绍了一种新型的利用图像活动性(IAM)快速估计水下图像端到端体验质量的方法。首先引入结构相似度(SSIM)作为图像感知服务质量(PQo S)参数评价图像质量,将图像初始活动性(IAM)作为区分图像内容的本征参数;随后基于质量向量(QV)的概念,分别分析了非压缩图像的结构相似度,图像初实活动性与无条件丢失概率(SSIM-IAM.-ulp)之间的联合特性,以及压缩图像的结构相似性,压缩率与无条件丢失概率(SSIM-IAM.-ulp)之间的联合特性。最后,在上述联合特性的基础上提出了劣化图像SSIM的预测算法。测试实验证明,该类算法有较高的预测准确率,预测误差最低可达0.8%。This paper introduces a novel method for quick estimating the end to end Perceived Quality of Service( PQo S) of underwater image based on image activity measure( IAM). Structure Similarity( SSIM) is first introduced as the evaluation standard of image PQo S parameter to evaluate the quality of image,while the IAM of original image is utilized as an intrinsic parameter to discriminate the image contents. Then,based on the concept of quality vector( QV),the SSIM-ulp-IAM0 features for non-compressed picture are analyzed,and the SSIM-CR-ulp features for compressed picture are analyzed as well. On this basis,the prediction algorithm based on SSIM for the degraded image is proposed. Test experiment result shows that this kind of prediction algorithm has high accuracy rate,and the lowest prediction error reaches to 0. 8%.国家自然科学基金面上(61571377;61471308)项目资

OPNET Simulation Method for Underwater Acoustic Networks Based on Chirp Spread Spectrum

针对OPNET软件在水声网络协议仿真中不支持信道结构改变和自定义调制方式的局限,以啁啾扩频的水声网络ALHOA协议仿真为例,提出了一种适合在OPNET上实现更真实水声通信协议仿真的方法。物理层调制方式采用自定义的π/4-DM-DQPSK制式,利用MATLAB将生成的调制曲线导入OPNET中配合OPNET其他管道的配置。在2种具有结构差异的Bellhop信道中验证对ALHOA协议的仿真效果,结果表明信道结构的变化能灵敏地影响ALHOA协议的仿真。此方法对利用OPNET软件灵活开展水声网络协议仿真具有较好的参考价值。Underwater acoustic(UWA) network protocol simulation on OPNET software could not follow the changing of channel structure and did not support custom modulation. In view of the limitations mentioned, a more realistic method of UWA protocol simulation on OPNET was introduced. UWA network ALHOA protocol simulation was token as an example. The physical layer modulation customized was called π/4-DM-DQPSK which was based on Chirp Spread Spectrum. In Matlab, the system would generate a modulation curve which would then be imported into OPNET to adjust the configuration of other pipelines. The simulation results of ALHOA protocol was verified in two Bellhop channels with different structures, which showed changing structure had a sensitive impact on ALHOA protocol. The method introduced has reference value on simulating UWA network protocol flexibly in OPNET.国家自然科学基金项目(61571377;61471308