quxianbiaojiyuzuobiao

自编二维离散傅里叶变换，仅限于二维变换，为什么一定要20个字。。(Two-dimensional discrete Fourier transform self)

基于线性预测分析的语音信号压缩感知.PDF(Compressed sensing for speech signal based on linear prediction analysis)

针对感应电机扩展卡尔曼滤波器转速估计中难以取得卡尔曼滤波器系统噪声矩阵和测量噪声矩阵最优值的问题，提出了一种基于改进粒子群算法优化的扩展卡尔曼滤波器转速估计方法。算法通过融合遗传算法和粒子群算法的优点，采用可调整的算法模型对粒子群算法进行改进，将改进的粒子群算法对扩展卡尔曼滤波器中的系统噪声矩阵和测量噪声矩阵进行优化处理，将优化后的卡尔曼滤波器应用于感应电机转速估计。( Extended Kalman Filter for induction motor speed estimation problem is difficult to obtain a Kalman filter system noise matrix and the measurement noise matrix optimal value proposed speed estimation method based on improved particle swarm optimization of the extended Kalman filter. By virtue of the genetic algorithm and particle swarm optimization algorithm fusion algorithm using the adjustable model PSO improvements that will improve the PSO extended Kalman filter system noise matrix and the measurement noise matrix optimization process, the optimized Kalman filter is applied to the induction motor speed estimate.)

matlab程序，气象学上画风场，可以添加标尺(matlab procedures, meteorology style games, you can add the ruler)

说明：  克里格法（Kriging，KRG）是由法国统计学家 Matheron 于 1963 年提出的，为纪念南非金矿工程师 Krige（Krige, 1951）曾于 1951 年使用回归方法对空间场进行预测的开创性研究，Matheron 将该方法命名为 Kriging，最开始该方法常被用于对矿产储量分布情况进行预（Matheron, 1963）。目前该方法作为最常用的空间插值算法，被广泛应用于地理科学、环境科学、大气科学等研究中。(Kriging (KRG) method was proposed by Matheron, a French statistician, in 1963. In order to commemorate the pioneering research of Krige (1951), a gold mine Engineer in South Africa, who used regression method to predict the spatial field in 1951, Matheron named this method Kriging. At first, this method was often used to predict the distribution of mineral reserves (Matheron, 1963) . At present, as the most commonly used spatial interpolation algorithm, this method is widely used in geographical science, environmental science, atmospheric science and other research.)

说明：  基本光反射 准直 折射演示程序，对需要的人有用(Collimated light reflection refraction basic demo program, useful to people in need)

计算超混沌Rossler吸引子的Lyapunov指数(calculated hyperchaotic Rossler attractor of Lyapunov exponent)

向下延拓,主要针对重磁数据处理方面的,可有效的增强下延的稳定性.(Downward continuation, mainly for gravity and magnetic data processing, can effectively enhance the stability of the next extension.)

Designs a linear phase FIR lowpass filter such that it: - minimizes the filter order - has a constraint on the maximum passband ripple - has a constraint on the maximum stopband attenuation (This is a quasiconvex problem and can be solved using a bisection. minimize filter order n s.t. 1/delta <= H(w) <= delta for w in the passband |H(w)| <= atten_level for w in the stopband where H is the frequency response function and variable is the filter impulse response h (and its order/length). Data is delta (max passband ripple) and atten_level (max stopband attenuation level). )

关于直接序列扩频通信的，介绍了其原理，给出了SIIMULINK仿真模型，并对各个模块作了详细的描述。 (On direct sequence spread spectrum communications, the principle given a SIIMULINK of the simulation model, and each module is described in detail.)