ID 原文 译文
48696 针对目前各种直扩体制,本文首先建立了适用于直接序列扩频(direct sequence spread spectrum,DS/SS)信号、直扩码分多址(code division multiple access,DS/CDMA)信号、多速率(multi-rate,MR)DS/CDMA信号以及多载波(multi-carrier,MC)DS/CDMA信号的统一模型,然后分析了相关函数二阶矩用于直扩信号检测的原理,推导得出了直扩信号相关函数二阶矩的理论值,指出了经典文献中理论分析成立的条件,最后通过仿真试验验证了该方法的有效性。 Aiming at all kinds of spread spectrum system, this paper established the suitable for direct sequence spread spectrum (direct sequence spread spectrum, the DS/SS) signal, spread spectrum code division multiple access (code division multiple access, DS/CDMA) signals and multi-rate (multi - rate, MR) and multi-carrier DS/CDMA signal (multi - carrier, MC) the unity of the DS/CDMA signal model, and then analyzes the correlation function for second order moment of spread spectrum signal detection theory, it is concluded that the spread spectrum signal correlation function is derived the theoretical value of the second order moment, points out the theoretical analysis in the classical literature established condition, finally the effectiveness of the proposed method is verified by simulation experiment.
48697 特征加权是聚类算法中的常用方法,决定权值对产生一个有效划分非常关键。 Feature weighting is a commonly used method of clustering algorithm, the decision value to produce a valid partition is critical.
48698 基于模糊集、粗糙集和阴影集的粒计算框架,本文提出计算不同簇特征权重的聚类新方法,特征权值随着每次迭代自动地计算。 Based on fuzzy set and rough set and granular computing of shadow set framework, this paper puts forward new clustering method to calculate weight different cluster feature, feature weights automatically with each iteration calculation.
48699 每个簇采用不同的特征权重可以更有效地实现聚类目标,并使用聚类有效性指标包括戴维斯-Bouldin指标(Davies-Bouldin,DB)、邓恩指标(Dunn,Dunn)和Xie-Beni指标(Xie-Beni,XB)分析基于划分的聚类有效性。 Characteristics of each cluster with different weights can be more effective in achieving clustering, and use clustering validity index including Davis - Bouldin index (Davies - Bouldin, DB), Dunn index (Dunn, Dunn) and Xie - Beni index (Xie - Beni, XB) analysis based on classification of clustering validity.
48700 真实数据集上的实验表明这些算法总是收敛的,而且对交叠的簇划分更有效,同时在噪声和异常数据存在时具有鲁棒性。 Experiments on real data sets show that the algorithm is convergent, and the overlapping clusters more effectively, and at the same time when there are abnormal noise and data in robust.
48701 捷联惯导系统(strapdown inertial navigation system,SINS)动态误差源众多,常规零速校正(zero-velocity update,ZUPT)方法难以取得理想效果。 The strapdown inertial navigation system (strapdown inertial navigation system of SINS) dynamic error source is numerous, the conventional zero speed correction (zero - velocity update, ZUPT) method is difficult to obtain the ideal effect.
48702 利用车辆正常行驶过程中横向和法向速度为零的约束条件,在考虑惯导系统与载车安装偏差角的基础上,推导了速度约束辅助的ZUPT算法模型。 Use of vehicles moving in the process of the constraint conditions that the transverse and normal velocity is zero, considering the inertial navigation system, on the basis of deviation Angle and the cars installed speed constraint auxiliary ZUPT algorithm model was deduced.
48703 利用光纤SINS进行了2h的车载导航试验,间隔10min停车,零速校正得到的水平和高程定位精度均优于10m。 2 h is studied by using optical fiber SINS navigation test, the interval of 10 min parking, zero velocity correction for the level and elevation of position precision is superior to 10 m.
48704 所提算法可以正确估计安装偏差角、惯性器件误差和初始方位误差,工程实用性强。 Proposed algorithm can correctly estimate installation deviation Angle, inertial device error and initial azimuth error, practicability is strong.
48705 提出了一种旨在提高定位精度,同时具有保证通信距离约束和传感器探测距离约束性能的无人机双机协同跟踪路径规划算法。 A aims to improve the positioning accuracy, and at the same time with secure communication distance constraints and sensor detection distance constraints, the performance of the unmanned aerial vehicle (uav) cooperative tracking path planning algorithm of two.