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This paper measured the constitutive relation of soil in the condition of the low stain-rate by Split Hopkinson Press Bar technology. It offers the reference for study in high stain-rate in the future. And simulated the explosion between soil and concrete by finite element dynamic analysis software LS-DYNA3D. Finished the numerical simulation for power of exploding between soil and concrete in different position of detonator and different scale model. Set out the curves of displacement, velocity, acceleration and pressure of different position. Obtained the destructibility of concrete target in different explosion condition. It offers data reference for theory studying and engineering designing.

本文首先利用分离式Hopkinson压杆实验技术测定了土在低应变率下的本构关系,为以后进行较高应变率下的研究提供了参考;后面着重利用三维显式非线性有限元动力分析软件LS-DYNA3D对土壤混凝土介质中的爆炸进行了数值模拟,采用土壤混凝土分层介质模型,完成了不同装药位置、不同缩比模型的混凝土模型中爆炸威力的数值模拟,测定了不同情况下的压力曲线及典型位置的质点位移、速度、加速度和压力,得出了混凝土靶在各种不同爆炸条件下的破坏情况,为理论研究和工程设计提供了数据参考。

The invention discloses a DC/DC circuit, comprising a PWM controller, a current amplifier, a peak current comparator, an error amplifier, a main switch, a synchronous switch and also an operational amplifier. The non inverting input end of the operational amplifier is used for coupling with input voltage or voltage reference, or used for coupling with the input voltage and the voltage reference; the inverting input end of the operational amplifier is used for coupling with the voltage reference or ground, and the output end thereof is connected with the non inverting input end of the error amplifier.

本发明公开了一种DC/DC电路,包括PWM控制器、电流放大器、峰值电流比较器、误差放大器、主开关和同步开关;还增设运算放大器,其同相输入端用于与输入电压或基准电压耦合,或用于同时与输入电压和基准电压耦合;其反相输入端用于与基准电压或地耦合,其输出端与所述误差放大器的同相输入端连接。

I point out that mechanics does not provide adequate foundation for the description of all natural phenomena. We should have a new understanding that in the 'change of location' of the same event of inertial system there exist two different reference systems that are mutually in uniform rectilinear motion. This new understanding will avoid the puzzle brought about by physicists' obscure yet obdurate conception as to which of the two mutually uniformly moving reference systems is not related to the inertia reference system.

我指出力学为一切自然现象描述所提供的基础是不够充分的,重新认识惯性系的同一事件"位置的改变"存在着两个互相匀速直线移动着的两种不同参考系,可以避免物理学家们模糊、执着地认为惯性参考系究竟是用两个互相匀速移动着的参考系中哪一个无关所带来的困惑。

So we designed a adaptive synchronizing controller based on hereinbefore hardware environment: first a small magnitude reference signal r is outputted to system through the signal card (to ensure that the vibrating system works in a linear state), and this signal is sent to the moving coil of vibrator through the power amplifier, so vibration is produced through electromagnetic induction. Secondly the vibration signal can feedback to the data acquiring card in the servo system through the acceleration sensor on the Vibroseis reactor M〓 and the base-plate M〓, then the computer can get the current vibrating state y〓 of the coil of vibrator according to the feedback information from the data acquiring card, and give a real time comparing between the current state y〓 and the reference output y〓 of the set-in reference model with current reference input being r , then regulates the correlative controlling parameters according to the error e〓=y〓-y〓 till y〓→y〓, finally normal signal sweeping begins with a certain phase fixed. Meanwhile a synchronization signal for seismic signal record is sent to seismograph from synchronization signal outputting component in the Vibroseis system to perform the controlling process of synchronization of sweeping phases.

为此,我们基于以上的硬件环境设计了一个自适应同步控制器:首先通过信号发生卡对系统输出小幅度的参考信号r(从而保证振动系统工作处于线性状态),信号通过前置放大器、功率放大器等送到激震器动圈,并通过电磁感应产生振动,振动信号通过可控震源激震器反应块M〓和基板M〓上的加速度传感器反馈给伺服系统中的数据采集卡,工控计算机根据采集卡的反馈信息,获取当前激震器动圈的振动状态y〓,并实时地将该状态与内置的参考模型在当前参考输入r下的参考输出y〓进行辨识,再将两者输出误差e〓=y〓-y〓对系统的有关控制参数进行调整,直至y〓→y〓,最后在经过某一固定的相位后,开始信号的正常扫描过程,与此同时,由可控震源系统的同步信号输出部件向地震仪送出一地震信号记录同步信号,进而完成扫描相位同步控制过程。

Because a derived object is also a base, there is an automatic conversion from a reference to a derived type to a reference to its base type. That is, we can convert a reference to a derived object to a reference to its base subobject and likewise for pointers.

因为派生类对象也是基类对象,所以存在从派生类型引用到基类类型引用的自动转换,即,可以将派生类对象的引用转换为基类子对象的引用,对指针也类似。

Observe the effect of Fuling Gancao Decoction on gastric liquid emptying and content of nitric oxide and acetylcholine esteras in the gastric fundus,antrum and duodenal tissu of functional dyspepsia rats and investigate the mechanism.1 Reference reviewThe reference review discussed the source of disease name of TCM for FD,etiology and pathogenesis of TCM,selection of therapeutic methods by different stages or according to the differential syndrome diagnosis,advance on the clinical and experimental research as well as the problems lying in the research of TCM and corresponding strategies.We also have summarized the recent research progresses on the FD.In the meanwhile,we further exploited the pathologic characteristics,diagnosis and treatment of FD;summarized etiology and pathogenesis of TCM for FD and application of Classical Prescriptions in clinical and experimental study;Collected and arranged the Literatures and summarized the recent research progresses of Fuling Gancao Decoction;Finally, collected and arranged the literatures of proved cases and clinical experiences of Fuling Gancao Decoction.2 Theoretical studyThe Theoretical study first discussed the source of TCM for stomach deficiency and congestion of fluid-retention in syndromes of FD;Secondly, summarized the indications of Fuling Gancao Decoction,that is:①epigastric throb,②cold hands and feet in syncope,③hydroadipsia,④gastric blockade,⑤gastric splashing sound,⑥no desire for drinks,⑦light white tongue,thin-white and smooth fur,⑧deep and wiry pulse are the indications of Fuling Gancao Decoction;Subsequently,analyzed the composition of Fuling Gancao Decoction,considered that ginger is the main drug which treating congestion of fluid-retention in Middle-Jiao by Zhang Zhongjing.3 Experimental study3.1 Experiment oneObjective:To establish the animal model of FD with delayed gastric liquid emptying and evaluat it.

同时观察茯苓甘草汤对FD大鼠胃液体排空及胃底、胃窦及十二指肠中乙酰胆碱酯酶、一氧化氮含量的影响,探讨茯苓甘草汤的作用机制。1文献综述参照古、今中医有关文献对FD的中医病名、病因病机、辨证论治方法、临床及实验研究进展进行了探讨,并对现代医学在FD研究中所取得的(来源:A0bBC论文网www.abclunwen.com)进展进行了总结,进一步明确了FD的发病机制、诊断和治疗的研究进展;总结了中医对FD的病因及发病机制、中医诊断及经方治疗FD临床及实验研究进展;并搜集和整理已发表的有关茯苓甘草汤研究报道,阐述了茯苓甘草汤的现代研究进展;最后搜集和整理了近现代著名医家应用茯苓甘草汤的经验及验案。2理论研究理论研究部分首先对功能性消化不良胃虚饮停证的认识进行了理论溯源;其次对茯苓甘草汤的适宜证象进行总结,认为:①心下悸,②四肢不温,③口不渴,④胃中痞满,⑤胃中振水音,⑥不欲饮水,⑦舌淡白,苔薄白而滑,⑧脉沉弦是茯苓甘草汤的主证;随后对茯苓甘草汤方药组成解析,认为生姜是仲景治疗中焦饮停的一味主药。3实验研究3.1实验一目的:探讨建立功能性消化不良胃虚饮停证的动物模型方法并对其进行评价。

The invention relates to a method for synchronizing at least one node of a bus system, which is operated with a predeterminable system clock period, whereby a local clock period and a reference clock period are given for the at least one node, and the reference clock period is synchronized with the system clock period. A local clock period, which is synchronized with the system clock period, of the at least one node is produced whereby linking the local clock period with a splitting factor, whereby the splitting factor represents a ratio of the reference clock period to the local clock period. The splitting factor for synchronizing the local clock period with the system clock period is adapted by adding or subtracting a adaptation value.

用于同步至少一个总线用户的方法,所述的总线系统用可预定的系统周期运行,由此为该至少一个用户给定局域时钟脉冲周期和基准时钟脉冲周期并且把局域时钟脉冲周期与系统时钟脉冲周期同步,其中通过把局域时钟脉冲周期与分配系数相关联的方式产生同步到系统时钟脉冲周期的、至少一个用户的局域时钟脉冲周期,其中,分配系数说明基准时钟脉冲周期与局域时钟脉冲周期的比例,其特征在于,通过加或者减一个适配值或者说补偿值,对用于把局域时钟脉冲周期与系统周期同步的分配系数进行匹配。

Reference frame's uniformation methods, adjustment methods and the implication of corresponding datum for various adjustment methods are systematically discussed about high precision GPS network. The systematical investigates on the choice of reference station in the high precision GPS data processing and the effect to adjustment results are made. Some general principles on the choice of reference station are presented.

系统地讨论了高精度GPS网数据处理中参考框架的统一方法、平差方法及各种平差方法所对应基准的意义,针对高精度GPS数据处理中基准站选取对平差结果的影响进行了系统地分析,提出了基准站选取的一般原则。

Project construction is in the national spatial coordinate reference frame, based on the use of high-tech means of Geodesy, in Baotou city, the information on outcomes and quality of the original plane, gravity surveying and mapping information, etc. Based on the results, in accordance with unified planning and overall design principles, laid covering the city's domain sets plane, elevation, gravity field information based on the integrated control network formed by the geodetic datum, elevation and gravity reference base composed of high-precision, three-dimensional center of the earth and practical reference Baotou modern surveying and mapping system for the "Digital Baotou" construction and large-scale mapping projects such as surveying and mapping provides a unified spatial orientation reference.

项目建设是在国家空间坐标基准框架的基础上,利用大地测量的高新技术手段,在包头市原有平面成果资料和水准、重力资料等测绘成果的基础上,按照统一规划、整体设计的原则,布设覆盖全市域集平面、高程、重力场信息于一体的综合性基础控制网,形成由大地基准、高程基准和重力基准等组成的高精度、三维地心、实用的包头市现代测绘基准体系,为&数字包头&建设和大比例尺测图等测绘工程提供了统一的空间定位基准。

Common rolling plank is shown intense (orientaton of 0002) tool reference plane, after rolling of horn waiting for diameter, plank grain orientaton by original (change of orientaton of 0002) tool reference plane is; of orientaton of blame tool reference plane the existence after strain crack of common rolling plank is many twin brilliant, amount of brilliant of twin of drawing of direction of rolling of edge of plank of rolling of horn w

普通轧制板材呈强烈的(0002)基面取向,等径角轧制后,板材晶粒取向由原来的(0002)基面取向转变为非基面取向;普通轧制板材拉伸断裂后存在大量孪晶,等径角轧制板材沿轧制方向拉伸孪晶数量明显减少,等径角轧制有可能启动了新的滑移系,而拉伸孪生只是作为一种协调变形机制。

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Do you know, i need you to come back

你知道吗,我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。