搜索结果: 76-90 共查到“知识库 模式识别”相关记录1539条 . 查询时间(1.715 秒)
Indoor Navigation System for the Visually Impaired with User-centric Graph Representation and Vision Detection Assistance
Indoor Navigation System Visually Impaired User-centric Graph Representation Vision Detection Assistance
2014/12/8
Independent navigation through unfamiliar indoor spaces is beset with barriers for the visually impaired. Hence, this issue impairs their independence, self-respect and self-reliance. In this thesis I...
基于随机PRI压缩感知雷达的速度假目标识别方法
随机重复间隔信号 压缩感知 假目标识别 动目标检测
2017/1/16
当存在有源速度假目标干扰时，随机脉冲重复间隔（Random Pulse Repetition Interval，RPRI）压缩感知雷达的回波稀疏性将被破坏，其目标检测与测速性能无法正常发挥.考虑到干扰机通常无法保证在相位调制时实时准确地更新雷达随机脉冲重复间隔，这将导致其生成的虚假目标信号与真实目标信号在不同的字典上稀疏.本文利用这一特性，在压缩感知框架下提出速度假目标识别算法，该算法通过建立联合...
Limited Labels for Unlimited Data: Active Learning for Speaker Recognition
speaker recognition i-vectors active learning
2014/11/27
In this paper, we attempt to quantify the amount of labeled data necessary to build a state-of-the-art speaker recognition system. We begin by using i-vectors and the cosine similarity metric to repre...
Non-Negative Factor Analysis for Gaussian Mixture Model Weight Adaptation for Language and Dialect Recognition
Non-negative factor analysis model adaptation Gaussian mixture model weight dialect recognition language recognition
2014/11/27
Non-Negative Factor Analysis for Gaussian Mixture Model Weight Adaptation for Language and Dialect Recognition.
Speech Feature Denoising and Dereverberation via Deep Autoencoders for Noisy Reverberant Speech Recognition
robust speech recognition feature denoising denoising autoencoder deep neural network
2014/11/27
Denoising autoencoders (DAs) have shown success in generating robust features for images, but there has been limited work in applying DAs for speech. In this paper we present a deep denoising autoenco...
SPOKEN COMMAND OF LARGE MOBILE ROBOTS IN OUTDOOR ENVIRONMENTS
Human-robot interaction real-time speech recognition voice activity detection modulation frequency
2014/11/27
We describe a speech system for commanding robots in human-occupied outdoor military supply depots. To op erate in such environments, the robots must be as easy to interact with as are humans, i.e. th...
A Back-off Discriminative Acoustic Model for Automatic Speech Recognition
context-dependent acoustic modeling back-off acoustic models discriminative training
2014/11/27
In this paper we propose a back-off discriminative acoustic model for Automatic Speech Recognition (ASR). We use a set of broad phonetic classes to divide the classification problem originating from c...
Research Developments and Directions in Speech Recognition and Understanding, Part 1
Research Developments Speech Recognition Understanding
2014/11/27
To advance research, it isimportant to identify prom-ising future research direc-tions, especially those thathave not been adequately pursued or funded in the past. The working group producing this ar...
LANGUAGE MODEL PARAMETER ESTIMATION USING USER TRANSCRIPTIONS
speech recognition, language modeling, adaptation
2014/11/27
In limited data domains, many effective language modeling techniques construct models with parameters to be estimated on an in-domain development set. However, in some domains, no such data exist beyo...
Robust Speaker Recognition in Noisy Conditions
Missing-feature theory multicondition training noise compensation noise modeling speaker recognition
2014/11/27
This paper investigates the problem of speaker identification and verification in noisy conditions, assuming that speech signals are corrupted by environmental noise, but knowledge about the noise cha...
肌电模糊熵特征的加权核FDA跌倒识别
跌到检测 表面肌电信号 模糊熵 加权核Fisher线性判别 模式识别
2016/12/29
针对跌倒常常对老年人的健康构成严重危害的问题.本文设计了一种基于肌电信号的跌倒检测方法,首先提取腓肠肌和股外侧肌的sEMG的模糊熵特征作为特征向量,然后,针对日常活动动作类(Activities of Daily Life,ADL)的数目远多于跌倒类导致的数据集不平衡的问题,提出了加权核Fisher线性判别方法,采用相应的平衡参数来调节样本核矩阵,最终,将跌倒与行走、蹲下和坐下辨识出来.实验结果表...
一种基于高阶累积量的正交空时分组码盲识别方法
空时分组码 高阶累积量 信号识别
2016/12/29
针对全盲条件下正交空时分组码(OSTBC)的正交性识别问题,提出一种基于高阶累积量的OSTBC识别方法.通过对接收信号白化,在不需要信道估计的情况下,消除信道对识别结果的干扰,既减少了算法复杂度,又提高了低信噪比条件下OSTBC的识别概率;考虑实际系统中噪声对识别结果的影响,利用高阶累积量(阶数大于2)的去噪声特性,消除噪声对于STBC正交特性识别的影响;分析了两种四阶累积量的OSTBC识别特性,...
针对家庭辅助生活应用场景下的目标意图识别和异常行为判别问题,提出了一种基于目标轨迹的行为分析方法.首先,提出了关键点和关键区域的概念,将家庭环境划分为不同的关键点和关键区域,并以此来描述和区分不同轨迹;然后,提出了利用混合高斯模型的关键点及关键区域获取算法,将轨迹转化为关键点及关键区域表示,并以此为基础进行了行为意图的识别和部分异常轨迹的判断;最后,借助主成分分析的方法弥补混合高斯聚类在异常轨迹识...
滤波器设计是系统辨识和状态估计的重要基础.卡尔曼滤波通过状态预测和量测更新的实现框架,在最小方差准则下实现对目标状态的最优估计,但在单传感器量测环境中其滤波精度易受量测噪声随机性的影响.本文提出一种基于量测提升策略的卡尔曼滤波算法实现框架,新方法依据当前时刻量测和量测噪声先验统计信息构建虚拟量测,并通过对虚拟量测采样以及融合提升系统量测信息可靠性,进而改善状态估计精度.同时,针对算法在工程应用中实...
结合运动时序性的人脸表情识别方法
表情识别 脸部肌肉运动的时序性 贝叶斯网络 区间代数
2016/12/29
脸部肌肉之间的时空关系在人脸表情识别中起着重要作用,而当前的模型无法高效地捕获人脸的复杂全局时空关系使其未被广泛应用.为了解决上述问题,本文提出一种基于区间代数贝叶斯网络的人脸表情建模方法,该方法不仅能够捕获脸部的空间关系,也能捕获脸部的复杂时序关系,从而能够更加有效地对人脸表情进行识别.且该方法仅利用基于跟踪的特征且不需要手动标记峰值帧,可提高训练与识别的速度.在标准数据库CK+和MMI上进行实...