中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页
机构
成果
学者
登录
注册
登陆
×
验证码:
换一张
忘记密码?
记住我
×
校外用户登录
CAS IR Grid
机构
自动化研究所 [2]
长春光学精密机械与物... [1]
数学与系统科学研究院 [1]
上海应用物理研究所 [1]
高能物理研究所 [1]
采集方式
OAI收割 [6]
内容类型
期刊论文 [3]
会议论文 [2]
学位论文 [1]
发表日期
2019 [1]
2016 [1]
2006 [1]
2005 [2]
2004 [1]
学科主题
Chemistry [1]
Physics [1]
筛选
浏览/检索结果:
共6条,第1-6条
帮助
条数/页:
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
排序方式:
请选择
题名升序
题名降序
提交时间升序
提交时间降序
作者升序
作者降序
发表日期升序
发表日期降序
SPEAKER-AWARE SPEECH-TRANSFORMER
会议论文
OAI收割
新加坡, 2019-12-14
作者:
Fan ZY(范志赟)
;
Li J(李杰)
;
Zhou SY(周世玉)
;
Xu B(徐波)
  |  
收藏
  |  
浏览/下载:38/0
  |  
提交时间:2022/09/17
Speech-Transformer, speaker adaptation, end-to-end speech recognition, speaker aware training, i-vector
基于深度神经网络的说话人识别建模方法研究
学位论文
OAI收割
工学博士, 北京: 中国科学院研究生院, 2016
作者:
张姗姗
收藏
  |  
浏览/下载:47/0
  |  
提交时间:2016/06/29
说话人识别
深度神经网络
i-vector
Baum-Welch 统计量
递归神 经网络
异步随机梯度下降
Lossless wavelet compression on medical image (EI CONFERENCE)
会议论文
OAI收割
4th International Conference on Photonics and Imaging in Biology and Medicine, September 3, 2005 - September 6, 2005, Tianjin, China
作者:
Liu H.
;
Liu H.
;
Liu H.
收藏
  |  
浏览/下载:41/0
  |  
提交时间:2013/03/25
An increasing number of medical imagery is created directly in digital form. Such as Clinical image Archiving and Communication Systems (PACS). as well as telemedicine networks require the storage and transmission of this huge amount of medical image data. Efficient compression of these data is crucial. Several lossless and lossy techniques for the compression of the data have been proposed. Lossless techniques allow exact reconstruction of the original imagery while lossy techniques aim to achieve high compression ratios by allowing some acceptable degradation in the image. Lossless compression does not degrade the image
thus facilitating accurate diagnosis
of course at the expense of higher bit rates
i.e. lower compression ratios. Various methods both for lossy (irreversible) and lossless (reversible) image compression are proposed in the literature. The recent advances in the lossy compression techniques include different methods such as vector quantization
wavelet coding
neural networks
and fractal coding. Although these methods can achieve high compression ratios (of the order 50:1
or even more)
they do not allow reconstructing exactly the original version of the input data. Lossless compression techniques permit the perfect reconstruction of the original image
but the achievable compression ratios are only of the order 2:1
up to 4:1. In our paper
we use a kind of lifting scheme to generate truly loss-less non-linear integer-to-integer wavelet transforms. At the same time
we exploit the coding algorithm producing an embedded code has the property that the bits in the bit stream are generated in order of importance
so that all the low rate codes are included at the beginning of the bit stream. Typically
the encoding process stops when the target bit rate is met. Similarly
the decoder can interrupt the decoding process at any point in the bil stream
and still reconstruct the image. Therefore
a compression scheme generating an embedded code can start sending over the network the coarser version of the image first
and continues with the progressive transmission of the refinement details. Experimental results show that our method can get a perfect performance in compression ratio and reconstructive image.
Experiment research for I/Q technology applied in accelerator phase detecting
期刊论文
OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2005, 卷号: 29, 期号: 3, 页码: 312
Zhang, JB(张建兵)
;
Wang, F(王芳)
;
Wang, GW(王光伟)
收藏
  |  
浏览/下载:27/0
  |  
提交时间:2012/05/11
I/Q demodulator
vector phase detection
error correction
Experiment research for I/Q technology applied in accelerator phase detecting
期刊论文
OAI收割
HIGH ENERGY PHYSICS AND NUCLEAR PHYSICS-CHINESE EDITION, 2005, 卷号: 29, 期号: 3, 页码: 312-315
作者:
Zhang, JB
;
Wang, F
;
Wang GW(王光伟)
;
Wang, GW
收藏
  |  
浏览/下载:27/0
  |  
提交时间:2016/06/27
I/Q demodulator
vector phase detection
error correction
Duality in vector optimization in Banach spaces with generalized convexity
期刊论文
OAI收割
JOURNAL OF GLOBAL OPTIMIZATION, 2004, 卷号: 29, 期号: 4, 页码: 415-424
作者:
Mishra, SK
;
Giorgi, G
;
Wang, SY
  |  
收藏
  |  
浏览/下载:12/0
  |  
提交时间:2018/07/30
duality
nonsmooth programming
optimality conditions
type-I functions
vector optimization