压下的

Under the given condition of acoustic driver, the acoustic field including oscillating pressure, volume flow rate and acoustic impedance in resonator was theoretically reconstructed by using the two-microphone method. The experiment results validate that this method is applicable and accurate for the positions with non pressure antinode and node in resonator. The maximum errors near antinode and node area are up to 12.4%.

在给定双声源条件下，采用双传感器法对该系统谐振管中的声场参数（包括声压、质点速度、当地声阻抗等）分布进行理论声场重构，并通过实验分析，证实了该方法在等径谐振管内非声压腹点和节点处的适用性和准确性，而在声压腹点和节点处的误差最大达到12.4%。

The results show that when the porosity of sample was higher, compressure rate was higher and resilience rate was lower, however resilient rate of sample with higher porosity were increased notably when pressure was increased, and it tended to accord with of sample with lower porosity. The friction coefficient was higher when porosity of paper-based friction material was higher, and the friction coefficient tended to reduce and stabilize when braking pressure was increased. The friction coefficient of sample with high porosity tended to reduce and stabilize in continuous braking cycles.

结果表明：在相同载荷下，随着孔隙率增大，材料的压缩率增加而回弹率降低，随着载荷增加，高孔隙率材料的回弹率先明显增大，而后趋于稳定；在相同比压和转速下，孔隙率越高，材料的摩擦系数越大，随着比压增加，孔隙率高的材料摩擦系数逐渐降低，且不同孔隙率材料的摩擦系数逐渐趋于一致；在连续循环制动时，高孔隙率材料的摩擦系数逐渐降低并趋于稳定。

It basically operates the main point as follows: The left hand holds the ticket, the palm is downward, the thumb is pinned in the middle of the left end of the front of the bank note, the forefinger and middle finger are on the back of the bank note, pinch the bank note together with thumb; Left hand the third finger naturally curly, pinch, get up bank note little finger stretch to bank note front push down bank note below the Left deviation; The middle finger of left hand is exerted oneself slightly, the bank note of tight card together with the third finger, little finger; The left hand forefinger is stretched, the thumb is moved upwards, pin the side of the bank note, keep the bank note into the tile shape; Left hand wipe from tabletop bank note, bank note turn, thumb strength wiped from tabletop to borrow prop up bank note covering of a fan and oblique to oneself of WeiKai Cheng; Three fingers of right hand dip in water, rotate and move the lower right corner of the bank note downwards sharp with the thumb, the forefinger cooperates with the thumb to rotate and move on the back of the bank note; Play in one's arms, count while ordering with right hand the third finger bank note got up to rotate; Pay attention to the posture at the some paper money, the health is straight and upright, the eyes It must keep eyeball and bank note from,put dual tactics elbow at tabletop.

其基本操作要领如下：左手持票，手心向下，拇指按住钞票正面的左端中央，食指和中指在钞票背面，与拇指一起捏住钞票；左手无名指自然卷曲，捏起钞票后小拇指伸向钞票正面压住钞票左下方；左手中指稍用力，与无名指、小拇指一起紧卡钞票；左手食指伸直，拇指向上移动，按住钞票的侧面，将钞票压成瓦形；左手将钞票从桌面上擦过，钞票翻转，拇指借从桌面上擦过的力量将钞票撑成微开的扇面并斜对自己面前；右手三个指头沾水，用拇指尖向下捻动钞票右下角，食指在钞票背面配合拇指捻动；用右手无名指将捻起的钞票往怀里弹，边点边记数；点钞时注意姿式，身体挺直，眼睛和钞票保持一定距离，两手肘部放在桌面上。

It is found that under the same vibration mode, the equivalent inductance of the single layer piezoelectric transformer is the twice of the same quality piezoelectric oscillator; 2 Based on the density energy formula, the three-dimensional lump type equivalent circuit of the piezoelectric transformer has been set up.

发现在相同的振动模式下，单层压电变压器的等效电感是相同质量压电振子的两倍； 2）以能量密度公式为基础，建立了压电变压器的三维集总式等效电路图。

The influence of indentor radius on the plastic deformation has been discussed and some important results are as follows:(1) The influence of the ratio of ceramic coating thickness to indentor radius on the failure of coating, plastic deformation of substrate and crack propagation are obvious.(2)The propagation of crack in ceramic coating is assumes to be of semi-elliptical shape under normal contact with a rigid sphere.(3)Fatigue life of ceramic coating is mainly decided by substrate and load, the lower substrate elastic moduli and load, the more cycles of fatigue.

分析了压头半径对塑性变形的影响，模拟结果表明；(1)陶瓷涂层厚度和压头半径之比对涂层失效、基体塑性变形及裂纹的形成有显著影响；(2)在刚性球压头静态挤压条件下，陶瓷涂层中的预制裂纹按照椭圆形裂纹规律扩展；(3)陶瓷涂层的疲劳寿命与基体和载荷有很大关系，基体弹性模量越小，疲劳寿命延长。

A silicon based piezo-electricity socle girder miniature electric generating apparatus is provided with a silica fixing frame, an oxidizing layer, a platinum/titanium lower metallic layer, a piezo-electricity PZT layer, a platinum/titanium upper metallic layer, an electrode insulation protection layer, and a vibrating base; the structure of the silica fixing frame combines the monocrystal silicon wet method etching and dry-etching to process, whose structure is integrated as a whole, and the center part of the structure is in a socle girder shape, which includes a silicium socle girder and a free end mass block; the piezo-electricity power supply device uses a micro-machining technique to integrally machine, and can realize the integration of the power supply and the microelectronic devices.

一种硅基压电悬臂梁微型发电装置，有硅质固定框架1、氧化层2、铂/钛下金属层3、压电PZT层4、铂/钛上金属层5、电极绝缘保护层6、振动底座7构成；硅质固定框架1的结构是利用单晶硅湿法腐蚀和干法腐蚀相结合完成加工，其结构连为一体，其中心部分的结构为悬臂梁形状，包括硅悬臂梁a和自由端质量块b；压电电源装置利用微加工工艺集成加工，能够很好的实现电源、微电子器件集成。

The special behavior of bubble and two-phase flow for cryogenic fluid boiling in the lunate channel is obtained by optical method.

本文用分相模型和均相模型对狭缝通道内受迫流动沸腾时的总压降和摩阻压降进行了分析，结果表明，在小于度情况下，改变Chisholm计算式中修正系数的计算，可以比较准确的预测狭缝通道中受迫流动沸腾时的摩阻压降。

1 Contrast unstrengthened square reinforced concrete column and 10 reinforced concrete columns strengthened by circular steel jacket were tested under axial loading .

为研究圆形钢套管加固混凝土柱的基本力学性能，进行了1根未加固的普通钢筋混凝土柱和10根圆形钢套管加固的混凝土短柱在不同加固钢套管厚度及初始轴压比下轴心受压试验，初始轴力通过对未加固试件施加后张预应力来进行模拟；在试验研究的基础上，根据应变协调原则对加固后构件轴压承载力进行了数值分析。

Firstly, by the data measured from field test, it was analyzed the characteristics and effect in reinforcing soft foundation with vacuum preloading method in which there is underplayed confined aquifer and sand.

首先，总结了真空预压现场试验监测成果，结合本工程有部分打穿下卧承压含水层及普遍存在夹砂层的特点，分析在此情况下，利用真空预压法加固软基的工程特性和效果，为以后类似工程的设计、施工工艺改进、机理研究和数值模拟等提供参考。

During this process, a vacuum is generated in the chamber, and garnet abrasives and air are pulled into the chamber, through an abrasive feed tube, and mixes with this high speed stream of water.

此过程中，由于水射流的高速运动，在混合腔中产生了负压。在此负压作用下，从磨料罐输出的磨料与空气一起被吸入混合腔，并在水射流的加速作用下，经磨料喷嘴喷射出，形成磨料射流。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。