Design and Implementation of Network Fault Management Information System Based on Web

在通信市场竞争日益激烈的今天，大客户对于运营商的重要性不言而喻。80％的通信收入来源于20％的大客户。发展大客户用户，可以使运营商在市场竞争中获得更大的价值利益。为了改进大客户售后服务质量和响应时间，提高客户满意度和市场整体竞争力，降低大客户相关业务维护工作的复杂度，需要尽快建设以客户和业务为管理中心的网络故障管理信息系统。 本文所研究的网络故障管理信息系统是一个多专业、综合化的管理系统；它是收集、传输、处理和存储有关网络维护、运营和管理信息的一个网络故障管理信息系统；它能够让后台网络管理部门集中和实时监控大客户业务的运行质量和网络运行状况，先于客户发现故障，变被动维护为主动维护，确保大客户...At present, competition for the telecom market has been much fiercer. The key client is definitely important to operators. Over 80％ income is derived from 20％ key client. To develop the key client, the operators Call earn more benefit from the market. For the purpose of improving after-sale service quality and response time, also the client satisfaction and market competition power, reducing the c...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023026

攻“关”——厦门海关大厦投标案笔记

以“本原”为构想基点 ,求异为解题路向 ,基于属性、全图、整合、视空、功能、技术层面的演析 ,对厦门海关大厦本体进行了书写

Atmospheric Deposition Connected with Marine Primary Production and Nitrogen Cycle: A Review

大气沉降通过为海洋提供外源性氮、磷和铁等微量元素,可显著影响海洋氮、碳循环过程,并产生气候效应。一方面促进海洋初级生产和生物固氮,增强海洋吸收二氧化碳的能力;另一方面影响海洋氮、碳循环路径,增加海洋生物源气溶胶排放量,间接影响气候变化。由于大气沉降对海洋生态系统及气候变化的重要影响,相关科学问题已成为海洋科学与大气科学交叉研究的热点,被多个国际研究计划列为核心研究内容。在大气污染物排放持续增加与沙尘事件频发的背景下,大气沉降对我国东部陆架海(黄海、东海)及其邻近西北太平洋碳、氮循环过程的影响日趋增强,因此该海区已成为大气沉降及其气候影响研究的代表性海域。结合分子生物学和实验生态学手段理解大气沉降影响下的海洋初级生产过程,利用同位素示踪技术研究大气沉降对海洋氮循环的影响,以及获得大气沉降影响下海洋生物源气溶胶排放的观测证据将是未来研究的重点方向。Atmospheric Deposition( AD) provides external nutrients such as nitrogen( N),phosphorus( P)and iron( Fe) supporting the growth of phytoplankton in oceans and thereby exerts obvious impacts on carbon and nitrogen cycles and climate change associated.Specifically,the external nutrients derived from atmospheric deposition can promote the marine primary production and nitrogen fixation that enhance the ocean capacity in absorbing CO2; AD may also change a few pathways of carbon and nitrogen cycles in oceans and increase the emissions of biogenic aerosol and radioactive gases such as N2 O,DMS,etc.Due to the underlying important impacts on climate and environmental change,AD and processes related have become the hot topics of multidisciplinary studies in the areas of ocean and atmospheric sciences,and the focus of some international core projects such as Surface OceanLower Atmosphere Study( SOLAS),an International Study of Marine Biogeochemical Cycles of Trace Elements and Their Isotopes( GEOTRACES) and Integrated Marine Biogeochemistry and Ecosystem Research( IMBER).With the severe air pollution and high frequencies of Asian dust events,as the downwind areas of big cities and dust sources,the East China Sea and adjacent North Pacific have received increasing influences of AD.Limited studies showed that the increase of AD indeed caused significant influence on carbon and nitrogen cycles in these immediately related oceanic areas and the study there would have a signature effect on global oceans.A multidisciplinary study on the impacts of AD in oceans,e.g.,combing molecular biology and experimental ecology techniques to study primary production processes,utilizing isotopic techniques to trace the change of the nitrogen cycle,new evidences of ocean-biogenic aerosol emissions,etc.would be the focus in the future.国家重大科学研究计划项目“大气物质沉降对海洋氮循环与初级生产过程的影响及其气候效应”(编号:2014CB953700)资

A review of the microflora structure in the digestive tract of marine finfish

从海水鱼消化道结构、消化道菌群结构、消化道菌群功能及消化道菌群结构研究手段等几个方面综述了海水鱼消化道菌群结构的研究进展。指出海水鱼消化道菌群结构受到生长发育阶段、养殖环境及饵料变化等因素的影响。论述了正常消化道菌群的重要功能,比较分析了目前消化道菌群结构不同研究手段,阐明了消化道微生物分子生态学研究的学术价值。为筛选高效、专一性、可定植性的海水鱼益生菌奠定了基础。This paper reviewed the research progresses of the microflora structure in digestive tract of marine finfish, including physiological structure of the digestive tract in marine finfish, the microflora structure in the digestive tract, the function of the microflora in the digestive tract, and the analysis means of the microflora structure in the digestive tract. It was pointed out in this paper that the microflora structure in digestive tract of marine finfish was affected by the developmental stage of the fish, aquaculture environment, variation of the diets, and so on. Besides, the key function of the normal microflroa in the digestive tract and the different analysis means for the study of the microflora structure were discussed. Lastly, the academic values of studies on the molecular ecology of the microflora in the digestive tract were elucidated, aiming at providing reference for screening the efficient, special, and indigestinous prebiotics for use in the culture of marine finfish.国际科技合作重点计划项目(2004DF060800);; 中国博士后科学基金项目(2005037625);; 淡水生态与生物技术国家重点实验室开放课题(2005FB05);; 广东省自然科学基金项目(05300945)共同资

RCM法与ASTM C1202法的相关性研究

对评价混凝土抗氯离子渗透性能的2种测试方法-非稳态快速氯离子电迁移测定法(RCM法)与美国库仑电量法(ASTMC1202)进行了研究,探讨了二者之间的相关性。研究表明:氯离子扩散系数随着电通量的增大而增大,对于组分相同或掺同种矿物掺合料的混凝土而言,它们之间的相关性非常好。当矿物掺合料为粉煤灰时,氯离子扩散系数与电通量之间呈非线性关系;当矿物掺合料为矿粉或硅灰时,氯离子扩散系数与电通量之间呈线性关系

基于形态小波与排列熵的变速器齿轮故障识别方法

在深入研究形态小波与排列熵的基础上，提出一种新的变速器齿轮故障识别方法。引入形态小波的概念，提出采用形态Haar小波对实测变速器齿轮振动信号进行降噪预处理；将排列熵作为变速器齿轮故障的特征值，提取了包括齿轮正常、齿面轻度磨损、齿面中度磨损和断齿等4种工况的振动信号；依据不同的故障对应不同的排列熵分布，对各种故障状态进行分类，同时对比了未降噪信号的排列熵分布。变速器齿轮故障识别的实例验证了形态小波与排列熵结合能有效提高齿轮故障分类能力

考虑时变刚度与侧隙影响的非对称渐开线齿轮动力学特性研究

为获得更为准确的非对称渐开线齿轮动力学变化规律，将时变啮合刚度和齿轮侧隙两个因素引入传统齿轮副扭转振动模型，建立非对称渐开线齿轮的动力学模型；利用Runge-Kutta法求解该模型，获得时间历程图、相图、Poincaré映射图以及FFT频谱图，进而分析时变啮合刚度和齿轮侧隙变化时的齿轮动力学行为。研究发现，非对称渐开线齿轮的平均啮合刚度大于对称渐开线齿轮，具有更优的动力学性能；时变啮合刚度中的1阶谐波分量对动力学性能影响不大，但平均啮合刚度影响较大，且其与动力学性能之间呈现出非线性变化规律，即随着平均啮合刚度的增加，动力学特性由差变好，但继续增加后又变差，因此，需根据实际工况确定其最优值。随着齿轮侧隙的增加，动力学性能下降，与对称渐开线齿轮相同。该项研究对于扩充非对称渐开线齿轮动力学理论体系、提高其传动性能，具有一定的理论意义和应用价值

基于GA-LQR两挡DCT离合器目标转矩控制

为获得更舒适的换挡品质，针对搭载有两挡双离合变速器（DCT）的电动汽车，对其换挡过程中两组离合器目标转矩进行协调控制。以冲击度与比滑摩功作为评价指标，并以冲击度与滑摩功为二次型目标泛函，采用线性二次型最优控制（LQR）方法确定换挡过程转矩相的离合器目标转矩。采用遗传算法（GA）的全局搜索能力对LQR中的加权矩阵进行最优选取，得到换挡品质更优的离合器目标转矩。最后，对当前采用定斜率计算确定的离合器目标转矩与采用所提方法确定的离合器目标转矩进行对比，结果表明，后者在换挡过程中所用的时间较少，产生的冲击度和比滑摩功都有所减小，有效提升了两挡DCT的换挡品质

Application of PDMS Hollow-fiber Membrane in Separation of Light Hydrocarbon Gas from Drilling Mud

聚二甲基硅氧烷(POlydIMETHylSIlOXAnE,PdMS),由于其对有机物的高亲和力、低传递阻力以及良好的加工性能,成为目前最常用的优先透过有机物的膜材料之一.本研究通过模拟钻井液轻烃膜分离实验,对制备的PdMS中空膜性能进行了测试评价.结果表明,PdMS膜对轻烃气体有较好的透过性能,膜两侧的轻烃体积分数呈线性关系,对丙烷气体浓度变化的响应时间仅为43.2S,脱气能力可达1 041.67Ml/(MIn·M2);研究结果可为PdMS中空膜在随钻气体检测技术中的应用提供重要参考.Polydimethylsiloxane(PDMS)is one of the commonly used membrane materials with high selective permeation through organics,and it has strong affinity to organics and low transfer resistance with good processability.PDMS hollow-fiber membrane was prepared in this work,and its performance in separating light hydrocarbon gas from drilling muds was investigated and evaluated.The results show that PDMS hollow-fiber membrane has good permeability,and the light hydrocarbon concentration at the two sides of the membrane shows linear relationship.It takes the membrane 43.2sto respond to the change in propane gas contents,and its degassing capacity can reach 1 041.67 mL/(min·m2).This study provides guidance in the application of PDMS hollow-fiber membrane to separation of light hydrocarbon gas from drilling muds in the oil-gas logging area.国家高技术研究发展计划(863计划)(2013AA064701