查询词典 simulation

The one primary goal of this paper is to provide a new method for simulation of acoustic and elastic wave propagation.

本论文分为两个层次，其一的目标是提出一个新的方法，用来研究并模拟声波和弹性波的传播。

This program can be three-dimensional numerical simulation of acoustic wave equation, but only in homogeneous isotropic media.

详细说明：这个程序可以实现三维声波方程的数值模拟，但是只是在均匀各向同性介质中。

The purpose of this thesis is to study the simulation of acoustic imaging of seabed objects.

本文目的是对海底物体进行声成像的仿真研究。

Computer simulation is a very useful approach to predicting sound propagation and obtain acoustical information in design process.

室内声场计算机模拟为厅堂音质的设计和研究提供了新的方法。

Numerical simulation of structural acoustics is an important aspect of noise and vibration control domains.

结构噪声数值模拟是振动与噪声控制领域的一个重要研究方向。

Based on the theoretical framework of the leakage and spread of such poisonous and harmful substances as glycol and acraldehyde, this paper advances the graphic simulation of GIS of poisonous and harmful substances.

以石化企业乙二醇、丙烯腈装置产生的有毒、有害物质泄漏、扩散和污染范围的理论模型为根据，提出有毒、有害物质的地理信系统扩散图形模拟方法。

Was researched. The work module of rudder was discussed and studied by simulation in side jet and aerodynamic compound control manner, the effect on guidance accuracy by control cycle of attitude control engine and action cycle of control loop was simulated.

重点对采用燃气动力／气动力复合控制方式中舵系统的工作模式进行了探讨及仿真研究，对姿控发动机控制周期及控制回路工作周期对制导精度的影响进行了初步仿真研究。

Computer simulation results show that higher control precision can be achieved by using intelligent integral action, and its relative error is reduced one order of magnitude compared with TM5; using the improvement on target bits allocation, the average decoding PSNR can be increased visibly, and the decoded picture quality can also be improved as scene changes.

模拟实验结果表明：采用智能积分作用能达到很高的控制精度，与TM5相比，相对误差降低了约一个数量级；采用目标编码量的优化分配策略，峰值信噪比有明显提高，而且能改善由于场景切换所带来的对图象解码质量的影响。

Simulation results show that it can achieve high control precision by using intelligent integral action, its relative error is reduced one order of magnitude compared with TM5; using the improvement on target bits allocation, the average decoding PSNR is increased visibly, and the decoded picture quality is improved when scene changes.

模拟实验结果表明：采用智能积分作用能达到很高的控制精度，与TM5相比，相对误差降低了约一个数量级；采用目标编码量的改进分配策略，平均峰值信噪比有明显提高，而且也能改善由于场景切换所带来的对图象解码质量的影响

Pole-placement and Inner model tuning methods are discussed finally;(2) For the linear derivative action, several different tracker-differentiators are presented to improve the quality of the derivative signals;(3) A neural network tuning method is given for the nonlinear PID controller which includes the above tracker-differentiator;(4) For the linear integral action, a nonlinear pre-phase integrator is studied in order to decrease the phase delay problem; Simulation results show that the nonlinear PID controller including the pre-phase integrator posseses better performance in both fast and stable property, and strong ability of anti-disturbance;(5) A simple optimal criteria is introduced to optimize the parameters of the nonlinear PID controller based on the pre-phase integrator.

仿真研究表明，由此形成的非线性复合积分PID控制系统，具有快速而平稳的过渡过程和超强的干扰抑制能力；(5)采用物理意义简单明确的目标函数的优化设计方法，对上述非线性PID控制器进行参数整定，达到了满意控制典型工业过程的目的。通过对直线电机伺服系统的仿真研究，表明该种非线性控制器具有同时跟踪多个目标的优越性能。

Don not attempt to do something which you can not to do.

不要企图做那些办不到的事情。

The expression of CTGF and TNF-αweredetected by immunochemistry and the number of Clara Cells was calculated.

光镜下观察肺组织的病理变化，采用免疫组化染色观察肺组织中结缔组织生长因子和肿瘤坏死因子-α的表达和Clara细胞的数量。