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基于matlab，利用香浓能量对心音信号进行包络提取(Based on matlab, using Shannon energy of the heart sound signal envelope extraction)

说明：  卫星姿态确定的卡尔曼滤波，使用matlab 仿真的姿态确定(satellite attitude determination)

根据直扩原理，首先有随机数发生器产生一系列二进制信息数据（+1，-1），每个信息比特重复Lc次，Lc对应每个信息比特所包含的伪码片数，包含每一比特Lc次重复的序列与另一个随机数发生器产生的PN序列c(n)相乘。然后在该序列上叠加高斯白噪声和形式为i(n)=Acosw0n余弦干扰下次信号，切余弦干扰信号的振幅满足条件A<Lc。在解调器中进行与PN序列的互相关运算，并且将组成各信息比特的Lc个样本进行求和。加法器的输出送到判决器，将信号与门限值0进行比较，确定传送的数据为+1还是-1，计数器用来记录判决器的错判数目。(According to the principle, first some straight expansion random number generator produces a series of binary data (+ 1-1), each information bit repetitive Lc times, Lc for each information bit contains PN code piece count, embraces each bit Lc times repeated sequence and another random number generator produces PN sequence c (n) multiplication. Then in the sequence superimposed on gaussian white noise and forms as I (n) = Acosw0n cosine interference next time signal, cut cosine interfering signal amplitude satisfy conditions A < Lc. In the modem with the cross-correlation operation PN sequence, and the information will comprise the Lc a sample bits peace. The output of the adder judgment device, will signal to compare with threshold 0 data transmitted, determine for+ 1 or-1, counter is used to record the number victimised judgment. )

惯性导航解算程序，四阶龙格库塔发更新四元数，求姿态、速度和位置(Solver inertial navigation procedures, fourth-order Runge-Kutta issued to update the quaternion, seeking attitude, velocity and position)

采用最小二乘逼近作为拟合实验数据的方法,利用F检验,确定实验数据拟合优度及最佳阶数,用编制的程序来拟合实验数据,得到了较好的结果(Least-squares fitting)

无线传感器网络的加权质心算法，用matlab编程的，需要的可以参考(Weighted centroid algorithm for wireless sensor networks using matlab programming, can refer to)

Efficient signal processing techniques are necessary for assessing the exposure to broadband magnetic fields. The use of flat-top windows along with the DFT is a simple and fast method that reduces the characteristic leakage errors and picket fence effects when using the classical DFT for the exposure assessment.

双站交汇定位分析 通过matlab仿真 合理分布通讯台位置(Bistatic cross positioning and Error Analysis)

智能天线中多单元圆形天线阵的波达方向估计(Smart antennas in multi-element circular antenna array of the Direction of Arrival Estimation)

For quantum well Schrodinger poisson