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Numerical Simulation and Experimental Investigation on A Thermoacoustic Engine with Tapered Resonance Tube A symmetrical standing-wave thermoacoustic engine with tapered resonance tube has been numerically simulated with liner thermoacoustics. The simulation shows that using tapered resonance tube in thermoacoustic engine could decrease the velocity amplitude and lower the total acoustic power loss in the resonance tube. The experimental results indicate that the harmonic was suppressed effectively by using the tapered resonance tube, and the pressure ratio was improved.

采用锥形谐振管的热声发动机的数值模拟和实验研究利用线性热声理论，对一台采用锥形谐振管的驻波型热声发动机进行了数值模拟，发现采用锥形谐振管可有效降低工质气体的速度振幅，进而减小在谐振管中声功率的损失；与一台在相同频率下工作的采用等直径圆柱谐振管的驻波型热声发动机进行了实验对比，结果表明，在使用锥形管作为谐振管的热声发动机系统中，谐振管中的非线性效应得到了明显的抑制，热声发动机在基频模式下稳定运行，压比增大而加热温度降低。

A simulation is done between MAODV and AODV with software. From the simulation results under different node speed, it indicates that MAODV could decrease the average of ETE delay and offer lower routing overhead effectively. MAODV can complete routing discovery, package retransfer and self-organize when the network topology is changed, MAODV routing protocol is useful to establish Ad hoc networks in military communication.

应用软件对MAODV路由协议和传统的ADOV路由协议进行了仿真，通过在节点不同移动速度下的网络性能进行仿真比较，结果表明，MAODV路由协议能有效地减小分组端到端传输的平均时延，降低协议开销，能够根据网络的拓扑变化进行自组织，完成路由的发现和分组的中转等基本功能，为自组网在军用通信中的运用奠定了基础。

SVPWM based on the realization of the permanent magnet synchronous motor simulation, simulation results than traditional direct torque control torque ripple small, fast response, good robustness.

详细说明：实现了基于SVPWM的永磁同步电机仿真，仿真结果比传统直接转矩控制转矩脉动小，响应快，鲁棒性好。

In this thesis we introduce this theory into the traffic simulation of cloverleaf and provide a new method in research of the urban traffic simulation. In this system, we use the modeling method of multi-Agent to build the Road Agent, Vehicle Agent, Detector Agent, etc and also provide the intellective decision-making unit and communicate pipe for each Agent.

本文将多智能体技术引入到了立交交通仿真中，采用多智能体的系统建模思路，将车辆、道路、检测器等以智能体的形式建模，并为每个交通元素建立独立的智能决策单元及相互通信的通道，使整个交通仿真系统在各交通智能体的不断交互过程中完成整个仿真系统的运行。

When using Runge - Kutta method in digital simulation for continuous systems, in order to ensure the stability of numerical computation and make simulation results having enough accuracy, the step - change strategy is usually adopted.

在使用龙格一库塔方法对连续系统进行数字仿真时，为了保证数值计算的稳定性以及仿真结果具有足够的精度，通常采用变步长策略。

Text in a simplified model of atmospheric re-entry under the paragraph of the establishment of TBM equation, using Runge- Kutta method to solve, through simulation, can be seen in line with the simulation model needs.

文中在简化的大气模型下建立TBM的再入段方程，并采用龙格-库塔法来求解，通过仿真，可以看出模型符合仿真需要。

The methods used here are proved be correct therefore are useful for the numerical simulation in unsteady incompressible flow with dual time step and preconditioning . Simulation to the sand saltation is carried.

文中所采用的双时间法的数值求解方法、边界条件的提法、差分格式的选取经验证是成功的，为双时间法与预处理方法的结合对低马赫数流动的数值计算积累了宝贵的经验。

The running condition of distribution centre is realized through analyzing the simulation result. The amount of salver is established through evaluating the utilization of salver. And also the correctness of AGVS is validated through simulation.

通过分析仿真结果，了解配送中心的运行情况；基于托盘利用率确定所需托盘的合理量；通过观察第三章所设计的AGVS的实际运行效果，验证设计的正确性。

The paper studies the auto-covariance estimation of Gamma distribution by using the asymptotic behavior of student U -statistic,gives the large sample interval estimation for the scale parameter,and carries out the computing simulation according to the method of random simulation.

利用学生氏U－统计量的渐近性质，研究伽玛分布的自协方差估计，同时给出了尺度参数的大样本区间估计，并采用随机模拟的方法进行计算模拟

The simulation job of saturator is performed based on the founded model, in which the difference between Lewis factor and Lewis number and also the impact of the Lewis factor value on simulation results is discussed in details.

根据饱和器数学模型，运用数值方法模拟和分析了饱和器的工作特性，重点讨论了Lewis因子和Lewis数之间的关系，并分析了Lewis因子的取值对模拟结果的影响。

Salt is good, but if the salt becomes flat and tasteless, with what do you season it?

14：33 盐本是好的，盐若失了味，可用什么叫它再咸呢？

He reiterated that the PLA is an army of the people under the leadership of the Communist Party of China.

他重申，人民解放军是在中国共产党领导下的人民军队。