脉动的

The background component must be calculated by integration of the product of aerodynamic force covariance and influence function, instead of mode superimposition, while the resonant component only consider the contribution of the 1st mode.

前者不能按振型分解法求解，而应通过对气动力协方差与影响函数乘积积分的方法来计算；后者可只考虑一阶振型的贡献，两者应按平方和开方的原则组合得到脉动风致响应的峰值。

Comparing with the equation of common machine tools, this equation has three characteristics: It includes the variable frequency driver's energy loss;The variable frequency driver's no-sine voltage wave causes mechanical pulse losses in mechanical driving system;Equivalent palstance of main driving system is of uniform continuity.

该方程相对于普通机床功率平衡方程，具有变频器自身存在较大的能量损耗、变频器输出的非正弦波形电压带来的电气谐波损耗和机械传动系统的机械脉动损耗、主传动系统当量角速度具有一致连续性等三个重要特点。

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。

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。

On the other hand, the mill housing works under pulsating load, so the fatigue damage can take place. With Miner formula and the P-S-N curve of the mill housing, fatigue life is predicted through being programmed in FORTRAN language.

另一方面，由于机架是在脉动载荷下工作，有发生疲劳破坏的可能，本文采用修正的Miner法则，结合机架的P-S-N曲线，通过FORTRAN语言编制程序，预测了机架的疲劳强度可靠性寿命。

Direct torque control is another high performance control technique of AC motor, it discard the decouple idea of vector control, but adapt flux oriented control and transient space vector theory, directly control stator flux and torque, it has the advantage of rapid torque response and less relying on stator parameters, but has the disadvantage of bigger torque ripple.

直接转矩控制技术是继矢量控制技术之后的又一种交流电机高性能控制技术，它摈弃了矢量控制中解耦的控制思想，采用定子磁链定向和瞬时空间矢量理论，直接对电机定子磁链和转矩进行控制，具有转矩响应快、对电机参数依赖小的优点，但它的不足之处就是存在转矩脉动。

This model can be simplified and applied in the simulation of Pogo vibration,whose results can be compared with those...

仿真结果表明非线性模型不仅可以反映出系统每个时刻的稳定性，而且可以再现Pogo振动失稳时发散和收敛的过程，特别是失稳时蓄压器处压力脉动变化的非对称特点。这些都非常符合Pogo振动的观察结果。

Lined up together, the songs on "A Piece of Blue" are a tableau of life in a quiet village on the Pacific Ocean, within a blue sea- and skyscape, where there is time for solitude and leisure, where life moves within the hush and sway of the ocean, the obbligado of ancient island rhythms.

生活在太平洋前一个安静的小村，在诗乡里，享受独处时光的慢郎中们，在海洋的律动与歌声中，聆听着岛屿的古老脉动。

The results show that the Reynolds stresses of the flow near the wall at the exit are abviously nonisotropic and the flow fluctuation transport downstream with the flow speed.

结果表明埋入式进气道出口近壁区气流的雷诺应力呈明显的各向异性，其上游的气流脉动是按气流平均速度向下游传输的。

So this method gives us a more scientific way to find other blood pressure parameters.With the rapid development of eletronics and computer technology,no invasion blood pressure instrument based on oscillometric method begin to come out.

测振法是无创血压测量中先进的检测方法，它定性地揭示了脉动压力信号随袖带压力变化的规律，并给出了平均压与脉搏波信号的定量关系，为血压参数进一步确定提供了一条更为科学的方法。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。