脉动

Researches on the earth's land surface processes and the geological environment essential factor and its dynamic mechanism have demonstrated that only with the equilibrant system of the low-temperature and low-stress and the scattered as well as dense multi-grains, the boundary condition for the slow, long-term and intermittent pulsation action can meet the formation conditions of such a rock deformation structure.

通过物理模型分析和试验变形比对等综合材料证明，变形砾石是遭受了既密集、又分散、还具有同时发生作用的长时期的多边界外力条件及平衡力系，内部形成破裂其应力传递过程和性质改变与变形形迹转变及其做功连续扩展，是由低于疲劳极限的具有脉动性作用微弱应力造成的。

Gust loading factor of displacement on three direction of the dynamic responses is obtained by the direct integral calculus method in time-domain.

利用时域内的直接积分法求出结构响应的时间历程，并且通过统计，得出了结构脉动响应三个方向的位移风振系数值。

Numerical Simulation of Flow Field in Pulsating Fluidized Bed Under special entry conditions, the CFD is used to simulate the three-dimension fluidized bed with different oscillation intensity and frequency in order to research the effect of sound oscillation on flow field in the fluidized bed. The results indicate that the sound oscillation can make the distribution of the flow field more uniform and can promote the heat and mass transfer.

脉动流化床流场模拟在特定的入口条件下，应用计算流体力学技术对三维流化床在不同振动强度、不同频率扰动作用下的流场进行模拟，得到声波扰动对流化床流场分布的影响，结果表明声波振动可以使流化床内的流场分布更加均匀，促进热质传递。

In this paper, the FIR low-pass digital filtering method is first introduced for reducing the effects of noise signals in the experiment of velocity measurement of high-temperature flue gas flowing in pipe. The experimental results indicated that, only one peak presents in the cross-correlation graph, which is in good agreement with theoretical analysis result. Secondly, the temperature and pressure pulse signals of the high-temperature flue gas, obtained by thermocouple and pressure sensor, are introduced to explain the applicability of sensor characteristics.

本文介绍在测量管内流动的高温烟气流速的实验中采用FIR低通数字滤波器滤波方法可以排除干扰信号的影响的研究，实验结果证明，经过滤波处理后的信号互相关函数的图形不会出现大小相当的多个峰值，符合理论分析的结果；其次，本文还介绍了用热电偶和压力传感器采集的烟气温度和压力脉动信号，分析了传感器特性对相关测速的适应性。

In this system,the VVVF(variable voltage variable frequency) control method based on magnetic flux trajectory is applied.In the system,it is the target for the magnetic flux linkage polygon to be greatly approximate to the ideal magnetic flux circle.Considering such limitations as the low speed torque ripple,high speed real time and the working frequency of switching element,through the subsection synchronization control method by applying different numbers of magnetic flux linkage polygon for different frequency range,the perfect precision specifications for speed can be obtained.

系统采用基于磁通轨迹法的他控式变频调速方案，以磁链多边形尽量逼近理想磁通圆为目标，并考虑低速转矩脉动、高速实时性和开关元件的工作频率限制等约束条件，通过采用分段同步控制方式，在不同的频段采用不同的磁链多边形边数，使系统获得了优异的转速精度指标。

Chapter 5 deals with some variables's basic relations of synchronous /full-wave rectifier/LCR circuit, the effects of parameters on output voltage ripple and dynamic characteristics are presented.

第五章着重分析了凸极同步发电机一桥式整流—LCR电路的一些基本运行规律。研究了影响输出直流电压脉动和动态特性的主要因素，以及滤波参数、电机饱和、阻尼绕组对特性的影响。

In this paper, the fundamental principle of random process theorem is applied to the analyses of fluctuating pressure amplitude and frequency cha- racteristics of the overflow tower.

本文应用随机过程理论的基本原理，对泄水塔泄流的脉动压力的幅值特性及频率特性进行了分析。

Simulation results show that bubbles induce the circulation of particles in the fluidized bed in which the distribution of particle velocities can be expressed by the Gauss distribution.

计算结果表明床内气泡的形成造成床内颗粒的循环，使得流化床内颗粒具有不同的轴向和径向脉动速度，颗粒分速度分布近似服从高斯分布。

Gear pump in the outlet of the pressure fluctuation can be controlled within 1%.

在齿轮泵出口处的压力脉动可以控制在1％以内。

A new type of gear pump — balanced compound gear pump has been presented.

研究了平衡式复合齿轮泵的流量特性，给出了瞬态流量公式及流量脉动计算式。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。