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- acoustic pressure wave 声压力波
- Methods A hydrophone was used as energy converting equipment to collect wave of acoustic pressure in the field of ultrasound. 方法:采用水听器作为换能器,通过采集超声信号在空间声场内一点的声压波形。
- The relationships between oscillation frequency, pressure wave amplitude (ratio) and the size (length and diameter) of the acoustic amplifier are obtained. 得出了系统频率、压比等参数随声学放大器尺寸的变化关系。
- By measuring the acoustic pressure at two points along the tube, the standing wave sound field in the resonator could be separated into incident and reflected components. 在该方法中,只要测量沿程两点的声压,便可将管内平面驻波声场分解为入射波和反射波两种分量。
- The output signal from the interferometer is proportional to the acoustic pressure in water. 输出的信号直接正比于液体中的声压。
- Experiments indicate that our contrast technique is not sensitive to contrast dose, flow rate, acoustic pressure. 证明本文提出的造影成像方案对声压、流速、造影剂浓度在一定范围内不敏感。
- In a word, whether in estimator performance of DOA or detector performance of signal, vector array is excel to general acoustic pressure array. 综上所述,无论是目标方位估计性能,还是信号检测性能,矢量阵都优于常规声压阵。
- The afterflow represents a production of kinetic energy which becomes converted into a pressure wave when the outward flow of water is reversed. 残余塑性流动代表在外向水流返回时动能变为压力波的一种结果。
- The acoustic pressure and acoustic power of the whole structure are obtained by superposing those of each infinitesimal element. 以每个微元为一单位,分别计算声压和声功率之后叠加起来,即得整个结构的声辐射。
- And low permeability reservoir is slower than mid-high permeability reservoir in pressure wave propa... 低渗透油藏比中高渗透油藏的压力波传播速度慢。
- On the contrary, the collapse of bubble will become more violent with higher acoustic pressure, but overhigh pressure will make it never happen. 提高声场声压 会加剧气泡崩塌程度,但过高的声压又不能使微气泡崩塌;
- The data of the percussion pressure wave, the rat's b lood pressure and heart rate were recorded. 实验中由计算机记录冲击时脑承受的压力曲线并描记大鼠血压和心率变化。
- The results indicted that the deformation range by the first pressure wave is proporational with impact velocity. 研究结果表明:泡沫铝试样在不同的冲击速度加载下变形量大小不同,随着冲击速度的增大,试样达到该冲击速度下的最大变形所需的压缩次数(冲击波的反射、透射过程)减少。
- In circumstances like varying SNR, fluctuating acoustic pressure and excursive frequency, numerical simulation shows that the detection system works well. 在信噪比变化、声压起伏、线谱漂移等情况下,仿真结果表明双稳态随机共振系统都能较好地工作。
- The afterflow represents a production of kinetic energy which becomes convered into a pressure wave when the outward flow of water is reversed. 残余塑性流动代表在外向水流返回时动能变为压力波的一种结果。
- Abstract: Two ignition methods are investigated to reduce pressure wave in large caliber gun propelling charge with high loading density. 文摘:研究了两种能降低某大口径火炮高装填密度发射装药的膛内压力波的点传火方案。
- The radiated acoustic pressures are obtained by means of an expansion of independent functions generated by Gram - Schmidt orthonormalization using a group of spheroidal wave functions. 使用长旋转椭球函数得到一组独立函数,把声场中的声压表示为独立函数的线形叠加。
- Two ignition methods are investigated to reduce pressure wave in large caliber gun propelling charge with high loading density. 研究了两种能降低某大口径火炮高装填密度发射装药的膛内压力波的点传火方案。
- The conventional formula of the investigation radius is defined by the peak time of pressure wave,which is mainly on theory. 认为传统的探测半径计算公式是通过压力波的波峰进行定义的,其理论性很强。
- The Helmholtz integral formula shows that the acoustic pressure in an enclosed space can be treated as superimpose result of contribution of all boundary elements that act as sound sources. 由边界积分公式表明 ,封闭区域内某一点的声压可以看作由边界面上次级声源发出的声波在该点贡献的叠加。