随机圆形骨料

在采用差频接收下的二维RMA算法仿真程序(The simulation program of two dimensional RMA algorithm based on differential frequency reception)

说明：  Command line PDF toolbox, fully registered version. Can work together with FOXIT Reader

实现对地震信号 的频谱分析，达到滤波、去噪、提高分辨率等的作用(To realize the spectrum analysis of seismic signals, to achieve the function of filtering, denoising and improving resolution.)

activate your vocaloid 3 application with this

说明：  在MATLAB中建立模拟地面风场的数学模型，可以用于流体计算等。(A mathematical model to simulate the ground wind field is establed in MATLAB ,and it can be used in fluid calculation and so on.)

说明：  踏面擦伤，用途于踏面擦伤建模方国珍，车辆系统动力学(flat wheel tread flat simpack matlab modeling)

为了感谢惠俊英老师的谆谆教诲，再为好奇诸君奉上水声物理--海洋传播声场模拟的一份武林秘籍--海洋传播声场抛物方程解算方法--RAM！ 当好奇诸君阅毕此卷，再对照轻松跑完作业，即入门 RAM！ RAM 与 AcousticsToolbox 遵照 GNU 公共许可证进行分发。感谢Michael D. Collins 对 RAM 的原创，也感谢由 Free Software 凝聚起来的自由科学家社区(In order to thank Professor Hui Junying for his teachings, and then offer you a secret book of underwater acoustic physics, ocean propagation sound field simulation, the parabolic equation solution method of ocean propagation sound field, RAM! When curious gentlemen read this volume, and then compared with easy running homework, that is, access to RAM! RAM and Acoustics Toolbox are distributed under the GNU Public License. Thanks to Michael D. Collins for his original RAM and to the Free Software community of free scientists.)

根据舰船螺旋桨噪声一书给出的计算空泡噪声的公式，简便计算各种条件下的螺旋桨噪声级的程序(According to the formula for calculating the cavitation noise given in the book "Propeller Noise of Ships", the program for calculating the propeller noise level under various conditions is simple and convenient.)

GPRSim.net is a basic GPR time domain simulation tool. It is partially based in the transmission line model and allows up to ten layers to be simulated with frequencies ranging from 200 to 2000 MHz. It can be used to try out different real world survey scenarios and understand how different center frequency antennas could perform, as well as getting an idea of how the ground penetrating radar A-scan might look like in the given conditions.

多次改进的seis系列传统正演源程序seis88，仅供参考。(for ray tracing use.)