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In addition, for the same power capability, the cascaded converter requires less number of main power components such as main valves and main diodes.In this paper, cascade H-bridge converter with CPS-SPWM technique has been proposed, which is the combination of cascade structure and CPS-SPWM technique.

本文提出了基于CPS-SPWM技术的级联H桥型多电平变流器，它是CPS-SPWM技术与级联H型变流器拓扑结构的结合，同时具备二者的优点，在大功率变流器领域具有很好的应用前景。

Basing on the statistic datum existed of bridge deck pavements, analyze the main failure modes and its main causes to damage on different styles of bridge, at the same time, through the big calculation software ,establish the space models to simulate the course of mechanics of bridge deck pavements, analyze the main factors which affect the bridge deck pavement"s mechanics and the relations between them; according to the atmospheric circulation circumstances of bridge deck pavements, take the statistic datum of using life of prefabricated T-beam、box girders and casting girder in region of HUA-NAN as examples to returning analysis ,establishing the life prediction model of this style bridges; associating "the Method of Estimating to Life Cycle Costing,bring forward this method to take a evaluation of economy on bridge deck pavements, insure the life cycle costing reasonable; giving some tactics on the design of bridge deck pavements.

以既有桥梁的桥面铺装层使用现状统计资料为基础，分析了各种类型桥面铺装层的主要破坏形式及其主要损伤原因，同时利用结构分析软件，对桥面铺装层建立空间模型模拟其受力作用过程，分析影响桥面铺装层受力大小的主要因素以及各因素与铺装层受力大小之间的关系；按照桥面铺装层所处环境的不同，以华南地区预制T、箱梁和现浇梁的桥面铺装层正常使用寿命统计数据为例，通过回归分析建立该类型桥面铺装层的正常使用寿命预测模型；利用寿命周期费用评价方法，对特定铺装层的设计方案某一参数的变化所带来的经济效益进行评价；给出桥面铺装层设计构造建议。

An ATM89C51 is used as the MCU of main board, integrating with the standard circuit and IO to extend communication channel. Main board must work steady and easy to maintenance. Its main job is communicating with computer, sampling from every hardware operation, driving the LCD system.

论文的主要工作包括以下四个方面：1 硬件电路设计思路：使用可靠的硬件电路技术，以AT89C51为主板的微处理器，配以外围电路扩展通讯信道，构成主控制器和艏艉站控制箱框架，可靠性高、维修性好。

When entering the diaphragm pressure on the top of the control room to the atmosphere or water by the downstream area of low pressure, the role of the bottom plate in the valve and the pressure below the diaphragm on the pressure value is greater than the top, so the main valve disc to the fully open position; when entering the diaphragm pressure above the control room can not water the lower reaches of the atmosphere or area of low pressure, the role of the diaphragm on the top of the pressure value is greater than the pressure below the value, so will the main valve pressure valve set to fully closed position; when the diaphragm pressure above the value of the control room at the entrance of the middle pressure and outlet pressure, the main valve in the regulator valve on the disk, and its regulation depends on the location of the needle-catheter system and adjustable valve guide of the role of joint control.

当阀门进入隔膜上方控制室内的压力水被排到大气或下游低压区时，作用在阀盘底部和隔膜下方的压力值就大于上方的压力值，所以将主阀阀盘推到完全开启的位置；当进入隔膜上方控制室内的压力水不能排到大气或下游低压区时，作用在隔膜上方的压力值就大于下方的压力值，所以就会把主阀阀盘压到完全关闭的位置；当隔膜上方控制室内的压力值处于入口压力与出口压力中间时，主阀阀盘就处于调节状态，其调节位置取决于导管系统中的针阀和可调导阀的联合控制作用。

When entering the diaphragm pressure on the top of the control room to the atmosphere or water by the downstream area of low pressure, the role of the bottom plate in the valve and the pressure below the diaphragm on the pressure value is greater than the top, so the main valve disc to the fully open position; when entering the diaphragm pressure above the control room can not water the lower reaches of the atmosphere or area of low pressure, the role of the diaphragm on the top of the pressure value is greater than the pressure below the value, so will the main valve pressure valve set to fully closed position; when the diaphragm pressure above the value of the control room at the entrance of the middle pressure and outlet pressure, the main valve in the regulator valve on the disk, and its regulation depends on the location of the needle-catheter system and adjustable valve guide of the role of joint control.

当进入隔膜上方控制室内的压力水被排到大气或下游低压区时，作用在阀盘底部和隔膜下方的压力值就大于上方的压力值，所以将主阀阀盘推到完全开启的位置；当进入隔膜上方控制室内的压力水不能排到大气或下游低压区时，作用在隔膜上方的压力值就大于下方的压力值，所以就会把主阀阀盘压到完全关闭的位置；当隔膜上方控制室内的压力值处于入口压力与出口压力中间时，主阀阀盘就处于调节状态，其调节位置取决于导管系统中的针阀和可调导阀的联合控制作用。

The main causes of misdiagnosis were:the main complaints and the main signs could be one or more of aeries of symptoms or signs of OSAHS itself or its complications and the lack of systemic knowledge of OSAHS.

误诊原因：①缺乏对OSAHS的认识；②OSAHS患者症状和并发症较多，主诉可能为OSAHS或其并发症的任何症状之一。

The main contents are as follows: In chapter 1, systematic conclusions of intension and characteristic of sustainabledevelopment of real estate industry are made after the review of home and foreign research achievements; Chapter 2 analyzes status quo and trait of Chinese real estate industry in 2005, from views of investment, exploitation and sale, three parts of real estate industry, with the help of massive graphs, as well as elaborates main problems existing in real estate market; In chapter 3, the gambling thought is used to divide the developing process of Chinese real estate market into three phases, according to the change of main market participators and their behaviors; Finally, in chapter 4 and 5, a system with 72 indices in research on sustainable development of real estate industry in china is established, and theories of Catastrophe, Cosines Vector Included Angle, Entropy and CRITIC are applied to appraise the current situation of sustainable development of real estate industry in 31 provinces and cities in 2004, then the consistency test of appraisal results is carried out by Kendalls Coefficient of Concordance and Spearman Correlation Coefficient.

本文的主要内容如下：第一章在查阅大量国内外有关可持续发展理论、房地产业有关研究文献的基础上，评介了有关理论概念，并对房地产业可持续发展的内涵进行归纳、总结；第二章从房地产投资、开发和销售三个环节入手，结合大量图表，分析2005年中国房地产业的发展状况和特点，揭示我国房地产市场存在的主要问题；第三章利用博弈思想，根据市场参与主体及其行为的变化，将中国房地产市场的发展过程分为三个阶段；第四、五章构建了一个由72个指标构成的房地业可持续发展指标体系，利用突变评判法、向量夹角余弦法、熵值法和CRITIC法对2004年全国31个省市的房地产业可持续发展状况进行评价，并运用肯德尔和谐系数和斯皮尔曼等级相关系数对评价结果进行一致性检验。

Consider that processes the factor such as being convenient, the whole frame adopts the stencil plate to press the shaping craft, so as to ensure the whole intensity of the frame; The main body of the frame has continued to use the traditional ladder-shaped structure, of simple structure, stability is good; Assign the scheme wholly according to the electric automobile, has confirmed the physical dimension of the frame; Combine the scheme of decorating of the main spare part of electric automobile, has confirmed the frame is released, the crossbeam one decorates a form and connects the method, install the needing of main spare parts such as the gear box,etc. in because some crossbeams, has taken the structural form of the ingot roof beam.

考虑到加工方便等因素，整个车架采用钢板冲压成型工艺，以保证车架的整体强度；车架主体沿用了传统的梯形结构，结构简单，稳定性好；根据电动汽车整体布置方案，确定了车架的结构尺寸；结合电动汽车主要零部件的布置方案，确定了车架纵、横梁的布置形式及连接方法，部分横梁因为安装变速器等主要零部件的需要，采取了元宝梁的结构形式。

By employing the Jordan-Wigner transformation and a modified mean field method, we are able to determine its ground-state quantum phase diagram approximately. The chapter IV is the main part of this Thesis. It contains the main innovations in our work. We propose and study in detail a S=1 Ising chain with the interplay of single-ion anisotropy and dimerization. The main results and innovations are the following: We show that the total number of the zero-component of spins at each site is a conserved quantity. This quantity, which may intuitively called as hole's quantum number, is hidden in the system. We show further that the hole's number in the ground-state is zero; By using the Jordan-Wigner transformation, we map this model onto a series of subsystems described by the spin 1/2 dimerized transverse Ising model. We solve the subsystems exactly, by presenting the exact wave functions and spectra;We show that this system exhibits a series of quantum phase transitions by varying the dimerization strength. We determine the quantum critical points exactly. We also show that the criticality is the same as that of the uniform S = 1/2 transverse Ising chain.

第四章是本文的重点及主要创新内容，我们具体研究了自旋为1的在横向单离子晶格场中的一维二聚化Ising链，我们得到的主要结果和创新之处是：(1)证明了这一模型具有一种隐藏的对称性，即自旋第三分量为零的格点数目是一个守恒量，并证明基态出现在空穴数目为零的子空间中；(2)利用Jordan-Wigner 变换将此模型变换到一系列自旋为1/2的横磁场中的二聚化Ising 模型，并给出了相应严格的波函数及能谱；(3)我们发现系统的基态随着二聚化强度的变化将呈现出一系列量子相变，我们得到了量子临界点的精确位置，并证明其临界性质与自旋为1/2的横磁场中的均匀Ising 链中的临界行为属于同一普适类。

These issues include: the main axis may cause a similar problem with the main axis of the fault has affected the accuracy of bending; workpiece clamping possible problem is that the workpiece center and the main discrepancies, which could lead to instability in rotating workpiece; servo motor failure: the feed system Ball Screw bending and oil do not lead to rust long run can also be caused by poor, such as the same issues.

这些问题包括：主轴主要可能引起类似问题的故障有主轴弯曲影响精度；工件装夹方面可能的问题是工件中心和主轴不一致，由此可能导致工件转动不稳；伺服电机出现故障：进给系统中滚珠丝杠的弯曲和长时间不上油导致生锈运行不畅等也可能引起相同的问题等。

Yet, Edith says, there was always money in the bank.

但是Edith说，她的银行户口里面总是有钱。

We have created a series of files that resolve this problem--one for each day of the 40 days of purpose.

我们制作一系列的档案去解决这问题---一个为标竿40天中的每一天。