咨询与建议

限定检索结果

文献类型

  • 3,791 篇 期刊文献
  • 698 篇 会议
  • 70 篇 学位论文
  • 11 篇 资讯
  • 2 册 图书

馆藏范围

  • 4,572 篇 电子文献
  • 0 种 纸本馆藏

日期分布

学科分类号

  • 3,055 篇 理学
    • 2,309 篇 统计学(可授理学、...
    • 966 篇 数学
    • 609 篇 生物学
    • 167 篇 物理学
    • 42 篇 系统科学
    • 39 篇 地球物理学
  • 2,063 篇 工学
    • 1,257 篇 计算机科学与技术...
    • 656 篇 电气工程
    • 201 篇 信息与通信工程
    • 174 篇 控制科学与工程
    • 155 篇 软件工程
    • 73 篇 电子科学与技术(可...
    • 72 篇 机械工程
    • 70 篇 仪器科学与技术
    • 50 篇 环境科学与工程(可...
    • 50 篇 生物医学工程(可授...
    • 36 篇 测绘科学与技术
    • 36 篇 交通运输工程
    • 35 篇 土木工程
  • 1,212 篇 经济学
    • 1,133 篇 应用经济学
    • 128 篇 理论经济学
  • 406 篇 医学
    • 204 篇 基础医学(可授医学...
    • 159 篇 临床医学
    • 157 篇 公共卫生与预防医...
    • 45 篇 特种医学
  • 390 篇 农学
    • 38 篇 作物学
  • 353 篇 管理学
    • 240 篇 管理科学与工程(可...
    • 53 篇 工商管理
    • 51 篇 公共管理
  • 143 篇 教育学
    • 133 篇 心理学(可授教育学...
  • 31 篇 法学
  • 12 篇 文学
  • 4 篇 军事学
  • 4 篇 艺术学
  • 2 篇 哲学

主题

  • 4,572 篇 em algorithm
  • 186 篇 maximum likeliho...
  • 181 篇 maximum likeliho...
  • 164 篇 mixture models
  • 161 篇 missing data
  • 153 篇 mixture model
  • 112 篇 clustering
  • 73 篇 hidden markov mo...
  • 72 篇 gaussian mixture...
  • 68 篇 incomplete data
  • 65 篇 parameter estima...
  • 60 篇 model selection
  • 58 篇 bootstrap
  • 56 篇 longitudinal dat...
  • 55 篇 kalman filter
  • 54 篇 hidden markov mo...
  • 53 篇 model-based clus...
  • 48 篇 expectation-maxi...
  • 47 篇 classification
  • 45 篇 random effects

机构

  • 24 篇 univ n carolina ...
  • 24 篇 univ missouri de...
  • 23 篇 penn state univ ...
  • 22 篇 univ washington ...
  • 22 篇 mcmaster univ de...
  • 21 篇 univ hong kong d...
  • 21 篇 mcmaster univ de...
  • 20 篇 univ michigan de...
  • 20 篇 indian inst tech...
  • 19 篇 shanghai univ fi...
  • 19 篇 univ connecticut...
  • 18 篇 harvard univ dep...
  • 16 篇 harvard univ sch...
  • 16 篇 univ florida dep...
  • 16 篇 univ washington ...
  • 16 篇 univ calif river...
  • 15 篇 univ waterloo de...
  • 14 篇 peking univ lmam...
  • 14 篇 guangzhou univ s...
  • 14 篇 univ british col...

作者

  • 39 篇 kundu debasis
  • 27 篇 yao weixin
  • 26 篇 lachos victor h.
  • 26 篇 balakrishnan n.
  • 23 篇 sun jianguo
  • 19 篇 tian guo-liang
  • 18 篇 ma jinwen
  • 17 篇 pal suvra
  • 17 篇 okamura hiroyuki
  • 17 篇 huang biao
  • 17 篇 dohi tadashi
  • 16 篇 bartolucci franc...
  • 16 篇 peng yingwei
  • 16 篇 wu rongling
  • 15 篇 shen pao-sheng
  • 15 篇 punzo antonio
  • 14 篇 zhang jiajia
  • 14 篇 zeng donglin
  • 14 篇 mclachlan gj
  • 14 篇 mclachlan geoffr...

语言

  • 4,178 篇 英文
  • 364 篇 其他
  • 20 篇 中文
  • 3 篇 德文
  • 1 篇 西班牙文
  • 1 篇 法文
  • 1 篇 日文
检索条件"主题词=em algorithm"
4572 条 记 录,以下是211-220 订阅
排序:
Automatic determination of the number of components in the em algorithm of restoration of a mixture of normal distributions
收藏 引用
COMPUTATIONAL MATHemATICS AND MATHemATICAL PHYSICS 2010年 第4期50卷 733-746页
作者: Vetrov, D. P. Kropotov, D. A. Osokin, A. A. Moscow MV Lomonosov State Univ Fac Computat Math & Cybernet Moscow 119992 Russia Russian Acad Sci Dorodnicyn Comp Ctr Moscow 119333 Russia
The classical em algorithm for the restoration of the mixture of normal probability distributions cannot determine the number of components in the mixture. An algorithm called ARD em for the automatic determination of... 详细信息
来源: 评论
Convergence of a stochastic approximation version of the em algorithm
收藏 引用
ANNALS OF STATISTICS 1999年 第1期27卷 94-128页
作者: Delyon, B Lavielle, V Moulines, E IRISA INRIA F-35042 Rennes France Univ Paris 05 UFR Math & Informat F-75270 Paris 06 France Univ Paris Sud CNRS URA 743 Orsay France Ecole Natl Super Telecommun CNRS URA 820 F-75634 Paris France
The expectation-maximization (em) algorithm isa powerful computational technique for locating maxima of functions. It is widely used in statistics for maximum likelihood or maximum a posteriori estimation in incomplet... 详细信息
来源: 评论
Analysis of interval-censored data from circular migrant and non-migrant sexual partnerships using the em algorithm
收藏 引用
STATISTICS IN MEDICINE 2007年 第2期26卷 309-319页
作者: Zuma, K. Lurie, M. Jorgensen, M. Human Sci Res Council ZA-0001 Pretoria South Africa Univ Waikato Dept Stat Hamilton New Zealand Brown Univ Sch Med Dept Community Hlth Providence RI 02912 USA Miriam Hosp Providence RI 02906 USA
In epiderniological Studies Where Subjects are seen periodically on follow-up visits, interval-censored data Occur naturally. The exact time the change of state (such as HIV seroconversion) Occurs is not known exactly... 详细信息
来源: 评论
QUANTITATIVE MAGNETIC RESONANCE IMAGE ANALYSIS VIA THE em algorithm WITH STOCHASTIC VARIATION
收藏 引用
ANNALS OF APPLIED STATISTICS 2008年 第2期2卷 736-755页
作者: Zhang, Xiaoxi Johnson, Timothy D. Little, Roderick J. A. Cao, Yue Pfizer Inc New York NY 10017 USA Univ Michigan Dept Biostat Ann Arbor MI 48109 USA Univ Michigan Dept Radiat Oncol Sch Med Ann Arbor MI 48109 USA
Quantitative Magnetic Resonance Imaging (qMRI) provides researchers insight into pathological and physiological alterations of living tissue, with the help of which researchers hope to predict (local) therapeutic effi... 详细信息
来源: 评论
CADem: A conditional augmented data em algorithm for fitting one parameter probit models
收藏 引用
BRAZILIAN JOURNAL OF PROBABILITY AND STATISTICS 2013年 第2期27卷 245-262页
作者: Azevedo, C. L. N. Andrade, D. F. Univ Estadual Campinas Inst Math Stat & Comp Sci Dept Stat BR-13083859 Campinas SP Brazil Univ Fed Santa Catarina Dept Informat & Stat BR-57072970 Florianopolis SC Brazil
In this article we develop an estimation method based on the augmented data scheme and em/Sem (Stochastic em) algorithms for fitting one-parameter probit (Rasch) IRT (Item Response Theory) models. Instead of using the... 详细信息
来源: 评论
An em algorithm for density estimation with randomly censored data
收藏 引用
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION 2003年 第3期73卷 223-232页
作者: Acusta, A Eggermont, P Lariccia, V GlaxoSmithKline Pharmaceut Res & Dev Collegeville PA 19426 USA
We propose a new estimator of the probability density function when the data is randomly censored, obtained through an em algorithm, for solving a "nonlinearly smoothed" maximum likelihood problem. This algo... 详细信息
来源: 评论
An em algorithm for the estimation of parameters of bivariate generalized exponential distribution under random left censoring
收藏 引用
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION 2013年 第9期83卷 1648-1660页
作者: Dewan, Isha Nandi, Swagata Indian Stat Inst Theoret Stat & Math Unit New Delhi 110016 India
In this paper, we consider the four-parameter bivariate generalized exponential distribution proposed by Kundu and Gupta [Bivariate generalized exponential distribution, J. Multivariate Anal. 100 (2009), pp. 581-593] ... 详细信息
来源: 评论
Fitting stochastic volatility models in the presence of irregular sampling via particle methods and the em algorithm
收藏 引用
JOURNAL OF TIME SERIES ANALYSIS 2008年 第5期29卷 811-833页
作者: Kim, Jeongeun Stoffer, David S. Univ Pittsburgh Dept Stat Pittsburgh PA 15260 USA Univ Maryland Baltimore MD 21201 USA
Stochastic volatility (SV) models have become increasingly popular for explaining the behaviour of financial variables such as stock prices and exchange rates, and their popularity has resulted in several different pr... 详细信息
来源: 评论
Anomaly detection of communication link of mobile internet of things based on em algorithm
收藏 引用
JOURNAL OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2022年 第6期22卷 1967-1979页
作者: Li, Qian Zhengde Polytech Dept Elect & Informat Technol Nanjing 211106 Jiangsu Peoples R China
The abnormality of communication link of mobile Internet of Things will threaten the security of communication of mobile Internet of Things, and the existing abnormality detection method is limited due to low accuracy... 详细信息
来源: 评论
A CONSTRAINED em-algorithm FOR UNIVARIATE NORMAL MIXTURES
收藏 引用
JOURNAL OF STATISTICAL COMPUTATION AND SIMULATION 1986年 第3期23卷 211-230页
作者: HATHAWAY, RJ Department of Mathematics and Statistics University of South Carolina Columbia SC 29208 United States
The em algorithm is widely used to calculate maximum-likelihood estimates corresponding to a mixture of normal distributions. The algorithm is altered using simple constraints which increase robustness against poor in... 详细信息
来源: 评论