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仅供学习这个是C语言二级考试中有难度的题(For study only. This is a difficult question in the C Language Level 2 Examination.)

说明：  PLS_Toolbox是用于故障检测与诊断方面的matlab工具箱，其中包括PCA、PLS等(Pls _ toolbox is a matlab kit for fault detection and diagnosis, including a variety of algorithms such as pca, pls, and subsequent processing: q statistics, t2 statistics, and so on.)

GPS测量数据处理可分为基线解算和网平差两个阶段，基线解算就是利用ＧＰＳ接收机接收到的 载波相位观测值做为基本观测值，对其进行差分处理。(GPS data processing can be classified as the baseline solution and flat screen two phase difference, baseline solution is the use of GPS receivers to carrier phase observation value as the observation values. The of differential treatment. )

This book guides software professionals through the traps and pitfalls of developing efficient, portable, and flexible networked applications. It explores the inherent design complexities of concurrent networked applications and the tradeoffs that must be considered when working to master them.

磁法日变改正程序，用于处理野外采集的数据进行日变改正。(Magnetic diurnal variation correction procedures)

是关于网络编程的许多小程序，想编写网络程序的可以看看。-programming on the network of many small programs, and procedures to prepare the network can see.

说明：  6. 在三条径的瑞利信道中，对于OFDM： (1) 请设计一种具体的导引辅助的信道估计方法，用Simulink进行仿真。画出比特信噪比与信道估计均方误差的关系曲线和比特信噪比与误码率的关系曲线。 (2) 设频率已同步，请设计OFDM一种具体的采用循环前缀进行时间同步方法，用Simulink进行仿真，画出比特信噪比与捕获概率的关系曲线。 (3) 设时间已同步，请设计OFDM一种具体的采用循环前缀进行频率同步方法，用Simulink进行仿真，画出比特信噪比与频率同步误差的关系曲线。(6. In the three-path Rayleigh channel, for OFDM: (1) please design a specific navigation-assisted channel estimation method and use Simulink for simulation.The relation curves of bit signal-noise ratio and channel estimation mean square error and the relation curves of bit signal-noise ratio and bit error rate are drawn. (2) if the frequency has been synchronized, please design a specific method of time synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit-snr and acquisition probability. (3) if time has been synchronized, please design a specific method of frequency synchronization using cyclic prefix in OFDM. Simulink is used for simulation to draw the relationship curve between bit signal-to-noise ratio and frequency synchronization error.)

说明：  利用API实现颗粒粘结力随时间的线性变化，模拟颗粒间粘性力(API was used to realize the linear change of particle adhesion force with time, and the viscous force between particles was simulated)

采用拟合和插值两种方法的外耳中耳的传输函数特性曲线(Transfer Function Characteristic Curves of Middle Ear and Outer Ear Using Fitting and Interpolation)

对数运算的C语言定点程序。给出了两个使用C的对数运算的实例，可作为参考。(C language sentinel procedures. Given two C's right to use a few examples of operations that may be used as reference.)