113172205sa

In this paper, we present two novel class-based weighting methods for the Euclidean nearest neighbor algorithm and compare them with global weighting methods considering empirical results on a widely accepted time series classification benchmark dataset. Our methods provide higher accuracy than every global weighting in nearly half of the cases and they have better overall performance. We conclude that class-based weighting has great potential for improving time series classification accuracy and it might be extended to use with other distance functions than the Euclidean distance.

说明：  改进防碰撞扩展ALOHA的matlab仿真算法(ALOHA anti-collision expansion of the improved simulation algorithm matlab)

通过步进频率技术实现二维信号的带宽合成，提高雷达信号的距离向分辨率。(Through the step frequency technology to 2 d signal bandwidth synthesis, improve the distance of the radar signal to the resolution. )

利用卡尔曼滤波对观测数据进行优化处理，并在观测数据的基础上对卡尔曼滤波进行改进(The Kalman filter is used to optimize the observed data, and the Kalman filter is improved on the basis of the observed data.)

目标跟踪与定位，为研究水下通信方面的书籍，一般用MATLAB实现程序仿真(target tracking and location for the study of underwater communications books, the general procedures in MATLAB simulation)

Beamforming or spatial filtering is a signal processing technique used in sensor arrays for directional signal transmission or reception

这是ROC曲线绘制matlab代码，用于数据分类时，对分类准确率评价的一种方法。(This is MATLAB code of ROC curves which is a uation method of classifying accuracy when the data are classified.)

S变换是一种时频分析方法，用于分析非平稳信号。(use S transform to process signal)

用matlab simulink 编写的一个小程序，可以用来观察设计系统辨识的模型参考的梯度法设计(Can be used to observe the reference gradient method for the design of system identification model using a small program written in Matlab Simulink)

双音多频编解码系统，用于产生双音多频信号，并由双音多频信号解码出对应的按键(DTMF codec systems, used to generate DTMF signal by the DTMF signal decoding keys corresponding)