QPSKwithAWGNRayleighchannel

拟牛顿法和最速下降法(Steepest Descent Methods)一样只要求每一步迭代时知道目标函数的梯度。通过测量梯度的变化，构造一个目标函数的模型使之足以产生超线性收敛性。这类方法大大优于最速下降法，尤其对于困难的问题。另外，因为拟牛顿法不需要二阶导数的信息，所以有时比牛顿法(Newton s Method)更为有效。如今，优化软件中包含了大量的拟牛顿算法用来解决无约束，约束，和大规模的优化问题。(The quasi-Newton method and the Steepest Descent Methods only require that each step iterations know the gradient of the objective function. By measuring the change of the gradient, constructing a model of the objective function is sufficient to produce superlinear convergence. This method is much better than the steepest descent method, especially for difficult problems. In addition, because the quasi-Newton method does not require information on the second derivative, it is sometimes more effective than the Newton s Method. Today, the optimization software contains a large number of quasi-Newton algorithm used to solve the unconstrained, constraint, and large-scale optimization problems.)

matlab仿真程序，适合初学者，比较实用，可用性高。(matlab simulation program, suitable for beginners, more practical, high-availability.)

RESEARCH PAPERS REGARDING WSN

无静差转速负反馈调速系统的仿真模型。系统的给定信号设置为210rad／s，Pl调节器的KP=1.2， =40 其它的参统的参数和前面静差系统的参数一样。(No static error speed negative feedback speed control system simulation model. System of a given signal is set to 210rad/s, PL regulator KP = 1.2 = 40 the other parameters of system parameters and the front static difference parameters of the system.)

load flow analysis using newton raphson method

coding for direct spread spectrum

说明：  四阶龙格库塔法解内弹道方程，具有很好的精度，程序通俗易懂(Fourth-order Runge-Kutta method solution trajectory equation for interior_ballstic,)

说明：  学习matlab的资料，包含matlab的练习题和上机训练(Learn matlab materials, including Matlab exercises and computer training)

An overview of high range resolution radar techniques

Viterbi decoding for communication