压点

The conventional numerical simulation of a reverberant field as a launch acoustic environment was introduced. Following the reciprocity theorem used in the coupled FE-BE model, the structural response due to reverberant acoustic excitation was substituted by the sound pressure caused by force excitation on the structure, then the output response power spectrum density of the coupled model subjected to reverberant environment was evaluated based on the stochastic analysis principle.

首先介绍了传统的构建混响声场的数值模拟方法；其后利用声振耦合中的互易定理，将混响声场的激励问题转化为结构模型上力激励引起的场点声压响应问题，并采用随机分析原理，用谱分析方法推导了结构在混响声场激励下的响应计算公式；最后建立了航天器典型结构的声振耦合模型，并分别用传统方法和利用互易定理的方法进行了数值模拟。

In high-voltage var compensation field, when switching the capacitor banks by mechanical switch, it is easy to bound when it closes and to restrike when it opens, and the mechanical switch can not be switched frequently. When switching the capacitor banks by electronic switch in series, it needs dynamic and static voltage sharing circuit and synchronous triggering circuit. It leads to complex structure and high cost.

为解决当前高压无功补偿领域采用常规机械开关投切电容器组开关合闸时触点弹跳产生过电压，分闸时易重燃及不可频繁操作，而采用串联固态电子开关需要相应的动、静态均压及同步触发电路导致系统结构复杂且成本较高的问题，提出一种基于新型高压投切开关的高压动态无功补偿装置。

The abnormal overpressure can be distinguished by the max pressure seal point and the depth of oil maturation threshold.

最大压力封闭点及油的成熟门限深度可以区分异常高压层的作用，在生油门限以下的异常压力带中的快速压实段，是油气初次运移最有利的层段。

According to this work, the two-dimensional field distribution of continuous sinusoidal wave vertically or obliquely radiated by a linear array of five monopole sound sources is numerically simulated in terms of the different initial acoustic pressure .

在此基础上，数值模拟了初始声压强弱不同的5个点声源组成的线阵列垂直或斜向辐射的连续正弦波在大气中传播时二维声场的分布情况。

It reach to siphonic resulation based on negative pressure of the pipe.

虹吸式屋面雨水排水系统利用建筑物标高与地面排水点产生的高差势能，依靠管道中的负压作用形成虹吸现象，从而达到快速排出屋面雨水的目的。

Moreover, elasticity and potency should be moderate during embroidering.meantime don't tie a knot in the begining of stitching and the ending and the head of thread lefting one cm should be pressed firmly on the back of material and pay attention to avoid the sleave of the head of the thread.

绣出的方向要一致，起针时应确定中心点，绣时要松紧适度用力均匀，起针或结束时不要打结，应留出一厘米左右的线头在面料背面相互压牢，注意不要使线头纠缠成团。

The structure beam response control method based on the traveling wave model was discussed theoretically. The theoretical traveling wave model was applied to a long thin beam with piezocrystal actuators and the traveling wave active control law for the condition of making measurement upstream and performing control downstream was derived and the control compensator formula of the flexural waveguide in the form of transcendental function was deduced.

从理论上探讨了基于行波模型的结构梁响应控制方法，在梁及压电陶瓷作动器处采用行波理论模型，导出了上游测量、下游点施加控制的行波主动控制律及相应的具有超越函数形式的控制补偿器表达式。

Leaf turgor loss point osmotic potential and saturation osmotic potential during the dry season were both significantly lower in all the three species, indicating a strong osmotic adjustment in adaptive to seasonal drought.

三树种叶片膨压丧失点的水势和饱和渗透势在旱季也均显著降低，表明三树种都通过较强的渗透调节来适应季节性的干旱。

Using solar cell to absorb solar energy and store into battery by DC-DC charger during daytime. When in the night, battery will be discharged to white LED by optical sensor and control circuit. Since the weather maybe cloudy or rainy, there is a spare AC power supply loop consist of transformer, bridge rectifier, filter and voltage regulator to prevent battery undercharge or circuit maintain. When the output current of battery is less than the preset value, the power source of white LED lamp will be switched over to spare AC power supply loop by the comparative and switching circuit.

用太阳能板，在日间吸收太阳光，将能源用DC-DC充电器储存於蓄电池中，夜间时由光感测控制电将蓄电池放电，提供白光LED灯所需的电源，为预防阴雨天蓄电池充电足或电故障维修，将使得灯无法点，另有市电经变压器与整稳压后之预备供电回，於蓄电池输出电低於预设值时，将白光LED灯电源换至市电预备回。

This region would extend from the three-phase point to the vapour pressure of pure H2S at the zero water-content axis.

这个区域会从三相点延伸出去，直至含水量为零的纯 H2S 的蒸汽压轴线。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。