xingyouxian

The first scheme is based on the spatial locality of feature vectors corresponding to similar images. Learning is effected by modifying the query vector to incorporate the positive examples. The second scheme is based on “distorting” our view of the feature space. An new similarity distance between an image and the query is learned from the relevance feedback.

将ELCentro波的加速度时程转换成速度、位移时程(Converting the acceleration time history of ELCentro wave into velocity and displacement time history)

：滤波 fs=400 采样频率,必须大于两倍基带信号最高频率 ts=1/fs 采样时间间隔 T=5 时间窗大小 t=0:ts:T (hf1=zeros(1,N) hf1(f<=B1&f>=-B1)=1 y1=hf1.*fftshift(y) figure subplot(211) plot(f,abs(fftshift(y))/N,f,hf1, r-- ) axis([-fs/2,fs/2,0,1.2]) title( 原信号频谱 ) xlabel( f /Hz ) subplot(212) plot(f,abs(y1)/N) title( 低通滤波，截止频率90Hz ) xlabel( f /Hz ))

谭浩强（第三版） 程序代码及习题答案.rar(Hao (third edition) program code and answer the questions. Rar)

FDTD方法，以PML为边界条件，是二维的算法(FDTD method, the PML boundary condition is two-dimensional algorithm)

扩展卡尔曼滤波，无迹卡尔曼滤波，粒子滤波三种算法的比较，matlab程序。(Extended Kalman filter, unscented Kalman filter, the comparison of the particle filter three algorithms, Matlab program.)

semivario structure funvtion,there is no need other steps

驱动力和制动力是车辆纵向力学特性中重要部分，本程序采用matlab，根据发动机的万有特性曲线和循环工况，绘制出车辆的驱动力和制动力随时间的关系(The driving force and braking force is an important part of the vehicle longitudinal mechanical properties, the program uses matlab, according to the universal characteristic curve of the engine and the driving cycle, to map out the driving force and braking force of the vehicle over time)

计算机图形图像设计课程理论，关于三次有理b样条曲线matlab实现，程序代码。(Computer graphics graphic design curriculum theory, on the three rational b-spline curve matlab realize, program code.)

一本关于matlab信号处理很好的教程，书中涵盖了信号处理所能用的所有程序(A good tutorial on matlab signal processing, the book covers all the signal processing program that can be used)