Simulation of acoustic field of electric impulse equipment in well bore filling liquid with finite element method 充液井孔内电脉冲仪声场的有限元模拟
Faulty impulse signals extraction and diagnosis of rolling element bearing: a blind deconvolution method 滚动轴承故障脉冲信号提取及诊断∶一种盲解卷积方法
In moda frequency band the energy distribution of vibration signal of roller bearing with the change of time is determined by the frequency of repetitive impulse forces, which are generated by the passing of each rolling element over the fault. 轴承旋转元件通过故障部位产生的脉冲力的频率决定了模态频率带信号能量随时间的分布情况。
A simple algorithm of impulse response for rectangular piston element is discussed. Impulse response of linear phased array is obtained by summing impulse response of a rectangular piston element with different delay time. 讨论了一种计算矩形活塞阵元声场脉冲响应函数的简便算法,通过对不同延时量的矩形活塞阵元声场脉冲响应函数进行叠加,得到线形换能器阵列的脉冲响应函数;
In this paper, the time reversal processes of impulse response of crust are simulated by means of a dynamical finite element method ( DFEM). 运用动态有限元方法,对地壳块体脉冲响应的时间反转过程进行了仿真研究。
Efflux elements in the different hydro-efflux hammer were use to go on experiment by adding pump discharge, and similar water jet reflection and impulse in efflux element were found when pump discharge was large. 通过对不同液动射流冲击器射流元件在增加泵量的情况下进行实验,发现射流元件内部出现了水射流近似反射及脉冲现象;
The method does not need training sequences or pre-estimation of channel impulse response, can work in multi-user environments. The multipaths number of each user can exceed the element number of array, and all parameters are paired automatically. 本算法同时具备:无需训练序列或预先知道信道冲激响应、可用于多用户环境、每个用户的多径数目可以超过阵元数、且多参数自然配对等特点。
The cathode was prepared by impulse electrodeposition on stainless steel substrate, with amorphous ingredients Ni-W-P as a carrier, doped SiC and the rare earth element. 采用脉冲电沉积法,制备了以不锈钢为基体,以非晶态Ni-W-P为载体,掺杂SiC和稀土元素的阴极材料。