1,107 research outputs found

    Investigation of data acquisition, storage and transmission of optical fiber perimeter sensor in network

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    伴随光纤及光纤通信技术的飞速发展,光纤周界传感技术也快速发展。光纤周界传感由于具有抗电磁干扰、灵敏度高、易部署,低成本、本质安全、便于组成传感网络等诸多优点,使得光纤周界传感器在安防、水利电力、公路、船舶、油气管道泄漏监测、光缆监测等领域被广泛应用。 本文主要研究光纤周界传感系统数据采集、存储与网络化传输的具体实现,该方案基于现有实验室光纤周界传感系统,采用CISCOVPN路由器、BUFFALONAS网络存储器、基于BCM2836处理器的嵌入式采集模块构成的网络化的数据采集、存储、传输的系统,比传统在本地数据存储方式,具有分布式、可大量存储数据、远程访问等优点。本文的主要工作及创新点有: ...With the rapid development of optical fiber and optical fiber communication technology, optical fiber perimeter sensor technology pace. Since the optical fiber perimeter sensor with anti-electromagnetic interference, high sensitivity, ease of deployment, low cost, intrinsically safe, easy composition sensor networks and many other advantages. The optical fiber sensor in the security perimeter, wat...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:X200922200

    The Extraction and Research of Finger Pulse Signal Base on Infrared Absorption

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    人体内,循环系统、神经系统等系统的生理信息都以某种方式体现在脉象中。因此通过脉搏检测所获得的脉搏波形图富含人体重要的生理信息,这些信息具有重要的医疗价值,可以用来预测内脏形态及其功能是否出现异常。同时,一般疾病症状出现之前,脉搏生理信息会提前出现。因此,该信号还可以为其他易于引起心血管疾病的病症,如高血压等,提供评估依据和参考。传统医疗检测设备多见于大中型医院,设备体积大,检查费用昂贵,不利于家庭日常保健。立足于现有的脉搏信号检测方法,本文研究并设计了一款基于红外光吸收的指端脉搏信号监测系统,该系统具有体积小,成本低廉,便携等优点。 本文开始简单介绍了脉搏信号的研究背景,进而阐明了研究意义;...In the human body, the physiological information of circulatory system, nervous system and other systems is reflected in the pulse in some way. So the pulse waveform figure has a lot of important physiological information that through detection. And the information has important medical value. They Can be used to predict whether the organ forms and function is abnormal or not. Usually, the pulse ...学位:工学硕士院系专业:物理与机电工程学院_机械电子工程学号:1992012115271

    Design and Implementation of Canteen Management Information System for a Vocational College

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    摘要 随着信息技术的高速发展,各类信息化技术也迅速普及推广到各行各业,成为经济和社会发展的助推剂。食堂管理信息系统作为保证食堂信息管理的重要内容,其信息化建设程度能进一步加强食堂的资源整合,提升高校食堂管理的质量。当前食堂信息管理针对的各类服务事宜具有餐点安全、采购高效、食品色香味俱全、财务统计清晰流畅等需求,由于高校现已经普及了校园一卡通消费和服务,且如二维码点餐等先进的技术应用逐渐普及,因而其资金结算方面流程更加多样、操作更加复杂。鉴于当前通信技术和计算机技术的快速发展,通过为某职业学院实现一种极具安全性、实用性的食堂管理信息系统具有十分重要的意义。 本文针对某职业学院食堂管理信息系统...Abstract With the rapid development of information technology, all kinds of information technology are also quickly spread to all walks of life and become the propellant of economic and social development. Canteen information management system is as the important content of information management, its informationization level can further strengthens resource integration of canteen and improve the...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323191

    Mechanism investigation of neutron absorption materials (Tb2TiO5,Dy2TiO5and Fe-Dy2O3)prepared by ball milling and sintering

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    核反应堆的功率调节是利用控制棒中的中子吸收材料进行的,以此来控制反应性。用于核电堆芯内的灰控制棒是用来代替通过调节硼浓度进行反应性控制。Tb2TiO5-Dy2TiO5和Fe-Tb2O3-Dy2O3材料被认为是灰控制棒用中子吸收体材料的优良候选材料。采用XRD、SEM、TEM和DSC等观察、分析与表征了球磨粉末混合物、退火粉末混合物和通过高能球磨和烧结工艺合成的Tb2TiO5烧结体的微观组织结构。同时对粉末混合物在球磨和退火过程中的物相演变机制进行了研究。测试了Tb2TiO5烧结块体的显微硬度、热膨胀系数和热扩散系数。 Tb4O7-17.605%TiO2混合粉末在500rpm下球磨96h后,T...Neutron-absorption materials are unsed to regulate the reactivity of nuclear reactor by absorbing neutrons. Gray control rodsare designed toachieve load following capability withoutsubstantial use of soluble boron. Tb2TiO5-Dy2TiO5 and Fe-Tb2O3-Dy2O3 are considered as excellent candidate materials used in gray control rods.Microstructures of ball-milling powders, annealed powders and Tb2TiO5 bulkss...学位:工程硕士院系专业:能源学院_工程硕士(材料工程)学号:3242014115224

    Transferring Passive Voice in English-Chinese Simultaneous Interpreting: A Corpus-based Study

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    被动语态是英语中一个重要的语法现象,但是在汉语里却没有被动语态这一说法,汉语中表被动的句子被称作被动式。英语被动语态和汉语被动式在构成方式,结构特点和时态等方面存在很大差异,这些差异给英语被动语态的同声传译带来了一定的困难。为应对这一翻译难点,本文选用基于语料库的研究方法,对英汉同声传译中被动语态的翻译进行研究。 为研究英汉同声传译中被动语态的翻译方法与技巧,本文以2011年夏季达沃斯同声传译语料库为依托,并借鉴了刘宓庆所提出的英语被动语态十种翻译方法,分析十种翻译法在同声传译中的运用,并基于所得数据与分析,最终总结出一些适用于英汉同声传译的被动语态的翻译方法与技巧。 为实现研究目的,本文...While passive voice is an important grammatical phenomenon in English, there is no such concept as passive voice in Chinese, in which sentences expressing passive meanings are called passive form. When comparing the two concepts, we find that English passive voice and Chinese passive form vary greatly in terms of their structures, formations and tense, which brings some interpreting difficulty for...学位:文学硕士院系专业:外文学院_英语语言文学学号:1202013115273

    The Study on the Strategies of the Space Renovation of the Old Residential Buildings ——Take the Self-built Residence in Old City of Xiamen Port as an Example

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    厦港老城区的大量自建住宅,因其本身产权和自建的特殊性,容易成为被政府和规划所忽视的群体。然而,旧城区中数量上占据了绝对优势的自建住宅,也是亟待改善的群体。为了符合厦港严格的改造政策,也为了改善居民的生活质量,进行住宅内部空间的改造是相对可探讨的更新与改善方式。 论文第一章和第二章作为基础章节,绪论明确研究背景及意义,第二章对住宅改造节目的案例进行分析和对比,归纳并拓展总结出住宅空间改造的7个策略:结构修缮加固、舒适性改善(通风/采光)、布局合理优化、空间复合利用、提高储藏效率、适老化改造与旧物利用。 论文第三章和第四章作为核心章节,以厦港老城区的自建住宅为研究对象,对其历史演变、相关政策、...Owing to the particularity of property right and self-built traits, a large number of self-built residences in old city of Xiamen port are easily neglected by government and institute of land planning. However, the quantity of self-built residences occupies an absolute superiority, so it is urgent to make improvement. In order to conform with the strict renovation policy in Xiamen port and improve...学位:建筑学硕士院系专业:建筑与土木工程学院_建筑学硕士学号:2522014115175

    环状RNA:消化道肿瘤诊治的新靶点

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    环状RNA(circular RNA,circ RNA),作为非编码RNA(non-coding RNA)的重要成员,广泛存在于包括人类在内的多种原核及真核生物体内,对生命活动具有重要的调控作用,已成为非编码RNA研究领域的热点。与线性RNA相比,circ RNA呈共价闭合环状结构,具有结构稳定、序列保守、组织特异性、时空特异性等特点,在包括消化道肿瘤在内的多种疾病中发挥重要作用。circ RNA可通过竞争性吸附mi RNA、调控基因表达、参与蛋白质翻译等多种途径,参与肿瘤的发生发展,在肿瘤早期诊断、疗效监测、分期分型、预后、耐药逆转等方面具有一定的潜能,有望成为消化道肿瘤诊断和治疗的新靶点。本文就circ RNA的结构特点、调控机制及其在消化道肿瘤的相关研究进展进行综述。广东省医学科学基金资助项目(No.A2018011)~

    Judgement of the real estate bubble and analysis of the monetary countermeasures

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    目前,我国房地产的泡沫问题争议已到白热化阶段,房地产是否存在泡沫?应如何进行判断?应从房地产投资增长速度、资金来源结构、负债率、空置率、房地产开发结构及房价收入比等方面进行判断,并进而提出我国房地产泡沫的货币对策。At present the contentious issue of the real estate bubble in China has been heatedly discussed.How to decide the existence of the real estate bubble? How to judge it? It can be judged from the growth of the investment in real estate,the sources of the funds,the liabilities rate,the housing vacancy rate,the structure of the real estate development and the housing price to income ratio.Furthermore the monetary countermeasures of the real estate bubble are advanced

    Investigation for Electrophoretic Deposition of Hydroxyapatite Coatings and the Surface Modification of Coatings

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    羟基磷灰石(Ca10(PO4)6(OH)2,HA)是人骨等硬组织的主要无机成分,具有良好的生物相容性和高的生物活性,被广泛用作为生物医用植入材料。然而,HA陶瓷材料的力学性能较差,限制了它在生物医学领域的应用。为此人们致力于发展各种HA涂层或复合材料。在医用金属上涂覆HA涂层是目前复合生物医学材料领域研究的热点之一。电泳沉积法可在复杂形貌的基体上获得均匀的涂层并且涂层的结构和成分可控。这些独特的优势使其在HA陶瓷涂层的制备中引起了广泛的兴趣。但是电泳沉积法制备HA陶瓷涂层普遍存在着结合强度不够高的问题。为了改善电泳沉积法制备的HA涂层的结合强度并进一步提高HA涂层的生物学性能,本论文在实验室课...Hydroxyapatite (Ca10(PO4)6(OH)2, HA), the major inorganic component of human bone and other hard tissues, has been used extensively for biomedical implant applications due to its good bioactivity and excellent biocompatibility. However, the poor mechanical properties of HA ceramic have limited its clinical applications. For this reason, a great deal of research has concentrated on the development...学位:工学硕士院系专业:化学化工学院化学工程与生物工程系_化学工程学号:2062007115088

    Empirical Analysis of Real Estate Bubble in China

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    近年来,我国房地产价格节节攀升,引发了对我国房地产市场是否存在泡沫的争论。由此,政府开始对我国房地产市场进行了一系列宏观调控。本文针对我国房地产市场是否存在泡沫;如何检验我国房地产市场是否存在泡沫;房地产泡沫存在的原因进行研究分析。房地产作为国民经济的支柱产业,如何保持房地产健康持续发展,具有重要的现实意义。 论文以我国房地产市场为研究对象,从房地产泡沫理论入手,并通过对我国房地产市场进行初步分析的基础上,得出我国房地产市场发展过快,各项指标均呈较快速发展,初步判断其存在泡沫;然后,通过1994—2005年我国房地产市场发展数据,建立房地产供给模型、房地产需求模型、房地产价格模型进行研究,得...The housing price climbs gradually in recent years. Heated discussion has been on the issue whether there is the existence of the real estate bubble. Therefore, the government carry on a series macro adjustments and controls on the market of the real estate. This paper concentrates on whether the real estate bubble is existence and how to test the real estate bubble and the reasons of real estate ...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:X20044103
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