Mechanical Performance Analysis of Perstressed Continuous Beam Bridge Under Fire

随着经济的发展，我国桥梁等基础设施得到了飞速发展，但随之而来的就是各种安全隐患，火灾就是其中一种安全隐患。一旦发生火灾，轻则中断交通、损害生命和财产利益，重则导致桥梁直接崩塌，难以修复。但我国对于桥梁受火的研究却还是刚刚起步，研究水平远远落后于实际工程需求。因此加快桥梁受火的研究显得十分必要。 本文以厦门市大嶝桥为研究对象，主要的研究内容如下： ①根据现有的研究成果，归纳火灾高温状况下，混凝土、预应力钢筋力学性能参数以及热工性能参数，揭示出混凝土热传导系数、弹性模量、热膨胀系数、预应力钢筋屈服强度、极限屈服强度、比热、容重等参数随着温度的改变情况。 ②基根据热力学知识，确定有限元求解温度...The development of China’s bridge and other infrastructure is speeding up dramatically with the development of economy. However,a variety of security risks such as conflagration are coming along. When a bridge catches the fire,not only can the fire cause the traffic jam and death,but also it can bring many disasters to the bridge. For example,the collapse or even the permanent loss of it will foll...学位：工学硕士院系专业：建筑与土木工程学院_桥梁与隧道工程学号：2532014115178

Research on Internal Control of Contract Management

2011年9月1日，中恒集团宣布与山东步长之间签订的天价产品总经销协议告吹，引起了资本市场上广大投资者的关注。从内部控制的角度来看，这一事件暴露了中恒集团在合同管理内部控制方面存在的重大缺陷，主要表现在合同策划立项、合同对象调查及选择、合同审查、合同履行监督、违约情况处理几个环节。中恒集团与山东步长的“合同门”事件仅仅是所有企业合同管理问题的一个缩影，本文以此为引子，分析了合同管理在企业经营活动中的重要性以及合同管理内部控制失效可能对企业产生的不利影响。 在对以往研究文献回顾和对《企业内部控制应用指引第16号——合同管理》及其解读进行评价的基础上，本文提出了建设合同管理内部控制体系的总体要求...On September 1th, 2011, ZhongHeng Group announced the failure of product distribution agreement with Shangdong BuChang. This caught the attention of investors in capital market. From the view of internal control, this event indicated that there existed material weakness in internal control of contract management, including contract planning and setting, contractor investigation and selecting, cont...学位：管理学硕士院系专业：管理学院_会计学学号：1752010115116

Legal Control on Stock Index Futures Trading Venture

股指期货作为一种金融衍生品，已在世界多个国家和地区成功实施。就中国而言，从2004年11月上海证券交易所着手开发股指期货算起，至少已历经四个年头。目前，国内股指期货相关技术上和制度上的准备基本成熟。 股指期货将在很大程度上改变国内金融市场的面貌，特别是在做空机制的引进上，将颠覆中国金融市场现有的思维模式。无论是股指期货交易的保证金机制所产生的杠杆效应，还是每日结算制度产生的对投资者短期的资金压力，乃至期货高于现货市场的敏感性等等，都是管理层和普通投资者应该考虑的问题。 由于中国股指期货尚未推出，本文更多的是从规范分析的角度论证，并结合其他地区股指期货运行情况，从法律规制的角度提出建议。 ...Stock Index Futures as a financial derivative has performed successfully in many countries and regions of the world. In China it has been four years since Shanghai Stock Exchange start to develop Stock Index Futures market on December, 2004. At present the preparations for the related technology and systems of domestic Stock Index Futures has matured. The introduction of Stock Index Futures wil...学位：法律硕士院系专业：法学院法律系_法律硕士(JM)学号：1292006115061

科学对待疫苗接种后不良事件

疫苗是延长人类平均寿命最有力的工具之一.脊髓灰质炎等多种传染病的发病率和死亡率,是目疫苗的应用成功地从地球上消灭了天花,显著降低前控制传染性疾病最有效的措施之一[1].广泛接种疫苗带来的健康效益,不论对群体或个体而言都是毋庸置疑的.然而,疫苗的发展史也伴随着悲剧:在19世纪晚期,使用神经组织细胞生产的狂犬疫苗预防了大量死亡,但每接种230人中就有1人出现癫痫、麻痹和/或昏迷[2];1942年,数十万美军士兵接种了包含人血清的黄热病疫苗,由于部分人血清中携带乙肝

戊型肝炎诊断、预防及治疗新进展

戊型肝炎由HEV感染导致,是全球最主要的病毒性肝炎之一。传统的观念认为戊型肝炎只流行于发展中国家,而随着研究的逐步深入,人们已经认识到戊型肝炎是一种分布于全球并能带来严重负担的疾病。近年来,随着可靠的诊断试剂和戊型肝炎疫苗的成功上市,相关研究及防控进入了一个新时代

闽南地区TT病毒的变异及经输血传播的初步证据

TT virus(TTV)DNA was tested by nested-PCR from sera of hepatitis patients and volunteer blood donors in Minnan area. The amplified segment was a 189 base pair region in TTV ORF2. A total of six sequences were obtained from three non-A to G hepatits patients and two from volunteer blood donors. The sequences were found to be with 82.9% to 99.3% homology to TTV Japanese strain and Chinese strain. The divergence of sequence in these six segments varied from 0.7% to 17.1%, which indicated that the TTV had been existing for a long time in this area. In the serum of a non-A to G hepatitis patient who was negative for TTV DNA in the 14th day of disease course turned to be positive in the 30th day, two TTV sequences were obtained which showed 92.1% nucleotide homology. It indicated that different TTV strains can co exist in the same person. This patient's blood had been transfused ten times between the collection of his TTV negative sample and his positive serum sample. Seven of the blood donors were traced an..

Isolation and identification of PAH-degradating strains and their degradation capability

以芴、菲、蒽、芘为碳源和能源筛选、分离PAHs降解菌。14株能降解利用PAHs的菌株被分离。通过HPLC分析,在含芴、菲、蒽、芘的混合培养基质中10号菌的降解能力最强。研究它的降解性能和生长情况,表明该菌在混合反应体系中培养30d后对芴、菲、蒽、芘的降解率分别为95.27、90.46、28和80%;在只含一种PAH的单反应体系中该菌对芴、菲、蒽的降解能力提高,降解率分别可达98.91、94.32和52.17%,而对芘的降解能力则降低,降解率仅为62.47%。与混合PAHs培养体系相比,在单一PAH培养体系中,细菌的对数生长期缩短1/3。经生理生化鉴定和16SrDNA序列对比分析,确定10号菌株属于假单胞菌,命名为PseudomonasspFAP10。Fluorenen, phenathalene, anthracene and pyrene were used as carbon and energey source to isolate and screen PAHs-degrading strains. Fourteen strains capable of degrading PAHs were isolated from the petroleum in seawater contaminated. Analyses was done by HPLC, strain No.10 showed the strongest degrading ability in the mixing system of fluorene、phenathalene、anthracene and pyrene. Its degradation performance and growth curve were tested. The degradation rates of fluorenen, phenathalene, anthracene and pyrene were 95.27%、90.46%、28% and 80% respectively in the mixing system within 30d. Under the condition of single PAH existence,the degradation rates of fluorene、phenathalene and anthracene by strain No.10 increased to 98.91%、94.32%、52.17% respectively while the degradation rate of pyrene decreased to 62.47%. Compared to the mixing system, the logarithmic growth phase of strain No.10 was shortened one third in single PAH system.. Based on the results of physio-biochemical identification and phylogenetical analyses of 16S rDNA sequence, strain No.10 was belonged to Pseudomonas sp,named as Pseudomonas sp FAP10.国家海洋局第三海洋研究所海洋生物工程重点实验室开放基金[A97304(021)

Moving Target Tracking of Robot Based on Human Simulated Intelligent Control

基于仿人智能控制理论,设计了轮式机器人动态目标跟踪控制方案.通过特征提取与识别对机器人感知状态空间进行划分,建立感知模态,结合多种控制方法,构成不同的控制模态,并利用产生式规则使不同的感知驱动相应运动控制.以中型机器人frOnTIEr-I为例,进行了仿真与实物控制实验,并与传统PId进行对比.结果表明该算法具有较好的轨迹优化和快速响应能力.A target tracking control system for wheeled robot is proposed based on human simulated intelligent control theory.Firstly,the perception space is divided into several modes through character extraction and recognition.Secondly,different control modes are built by combining different basic control methods.Finally,the corresponding motion control is driven by different perception according to production rule.Based on some middle-sized robot,Frontier-I,many experiments have been done in simulation and actual environment respectively,and are compared with the traditional PID control method.Experiment results show that the built controller has track optimizing capacity and fast responding ability.国家自然科学基金资助项目(60443004);重庆市教委科技项目(KJ080621