foursatvisitposition

Entity stream implementation for one block of virtual memory.

说明：  当今世界电子对抗日益激烈，对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing，正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性，因此逐渐成为雷达领域的重点研究方向。除此之外，OFDM信号时域和频域波形都比较复杂，当雷达信号采用OFDM技术时，敌方很难精确估计发射信号波形和瞬时频率，使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时，对于同样具有大时宽带宽积的线性调频信号，OFDM信号具有更好的抗欺骗式干扰的性能，因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)

to call WS from powerbuilder

High Power Amplifier Modeling for TWTA(Traveling Wave Tube Amplifier) and SSPA (Solid-State Power Amplifier)

斯坦福大学的高性能锁相放大器串口通讯源码，用于实时读取锁相放大器的振幅，相位和频率。对于SR830的使用者的二次开发提供了非常好的开发模板。(Stanford University' s high-performance lock-in amplifier serial communications source for real-time reading lock-in amplifier amplitude, phase, and frequency. For the secondary development of SR830 offers users a very good development template.)

逾渗网络模型的绘制，可以任意设置孔隙和网络的参数以及流体类型。(Percolation_network drawing)

计算气象数据及对流层延迟，一个很全的gps定位程序(Calculating meteorological data and tropospheric delays)

socket事例程序，该事例程序，通过端口覆盖技术实现不同功能的传送数据-socket examples of procedures, the procedures for example, through the port covers different technology to achieve data transmission functions

用VC++实现的网络文件传输，用了windows sockets来实现的-With VC++ Realize network file transfers, windows sockets used to realize the

进程保护，支持WIN7，已经在VS2010的环境WINDDK7600.16385.1下编译通过，代码中硬编码了cacl.exe这个进程，可以测试通过任务管理器不能关闭cacl.exe，但是，可以通过taskkill /pid来关闭进程，因此还需要升级。(Process protection, support WIN7, already at ambient WINDDK7600.16385.1 VS2010' s compiler, code hard-coded cacl.exe this process, the test can not be closed cacl.exe through the Task Manager, but can be disabled by taskkill/pid process, it also needs to be upgraded.)