检索范围:
排序: 展示方式:
Bayes estimation of residual life by fusing multisource information
Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 524-532 doi: 10.15302/J-FEM-2018034
Residual life estimation is essential for reliability engineering. Traditional methods may experience difficulties in estimating the residual life of products with high reliability, long life, and small sample. The Bayes model provides a feasible solution and can be a useful tool for fusing multisource information. In this study, a Bayes model is proposed to estimate the residual life of products by fusing expert knowledge, degradation data, and lifetime data. The linear Wiener process is used to model degradation data, whereas lifetime data are described via the inverse Gaussian distribution. Therefore, the joint maximum likelihood (ML) function can be obtained by combining lifetime and degradation data. Expert knowledge is used according to the maximum entropy method to determine the prior distributions of parameters, thereby making this work different from existing studies that use non-informative prior. The discussion and analysis of different types of expert knowledge also distinguish our research from others. Expert knowledge can be classified into three categories according to practical engineering. Methods for determining prior distribution by using the aforementioned three types of data are presented. The Markov chain Monte Carlo is applied to obtain samples of the parameters and to estimate the residual life of products due to the complexity of the joint ML function and the posterior distribution of parameters. Finally, a numerical example is presented. The effectiveness and practicability of the proposed method are validated by comparing it with residual life estimation that uses non-informative prior. Then, its accuracy and correctness are proven via simulation experiments.
关键词: residual life estimation Bayes model linear Wiener process
韩明
《中国工程科学》 2003年 第5卷 第3期 页码 51-56
提出了可靠性工程中参数的一种估计方法——新Bayes估计法,给出了失效概率、失效率的新Bayes估计的定义及其新Bayes估计。最后,结合实际问题的数据,进行了具体计算和分析,结果表明所提出的新Bayes估计法有效、可行,便于工程技术人员在工程中应用。
一种用于文本分类的去冗余特征选择新方法 None
You-wei WANG, Li-zhou FENG
《信息与电子工程前沿(英文)》 2018年 第19卷 第2期 页码 221-234 doi: 10.1631/FITEE.1601761
Standard model of knowledge representation
Wensheng YIN
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 275-288 doi: 10.1007/s11465-016-0372-3
Knowledge representation is the core of artificial intelligence research. Knowledge representation methods include predicate logic, semantic network, computer programming language, database, mathematical model, graphics language, natural language, etc. To establish the intrinsic link between various knowledge representation methods, a unified knowledge representation model is necessary. According to ontology, system theory, and control theory, a standard model of knowledge representation that reflects the change of the objective world is proposed. The model is composed of input, processing, and output. This knowledge representation method is not a contradiction to the traditional knowledge representation method. It can express knowledge in terms of multivariate and multidimensional. It can also express process knowledge, and at the same time, it has a strong ability to solve problems. In addition, the standard model of knowledge representation provides a way to solve problems of non-precision and inconsistent knowledge.
关键词: knowledge representation standard model ontology system theory control theory multidimensional representation
Elevated temperature creep model of parallel wire strands
《结构与土木工程前沿(英文)》 页码 1060-1071 doi: 10.1007/s11709-023-0981-y
关键词: parallel wire strands experimental study elevated temperature creep model
Impact of crude distillation unit model accuracy on refinery production planning
Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC
《工程管理前沿(英文)》 2018年 第5卷 第2期 页码 195-201 doi: 10.15302/J-FEM-2017052
关键词: impact of model accuracy on production planning swing cut+ bias CDU model hybrid CDU model refinery feedstock selection optimization optimization of refinery operation
Test-driven verification/validation of model transformations
László LENGYEL,Hassan CHARAF
《信息与电子工程前沿(英文)》 2015年 第16卷 第2期 页码 85-97 doi: 10.1631/FITEE.1400111
关键词: Graph rewriting based model transformations Verification/validation Test-driven verification
Digital twin-assisted gearbox dynamic model updating toward fault diagnosis
《机械工程前沿(英文)》 2023年 第18卷 第2期 doi: 10.1007/s11465-023-0748-0
关键词: digital twin gearbox model construction model updating physical–virtual interaction
Nitin Kumar SAXENA,Ashwani Kumar SHARMA
《能源前沿(英文)》 2015年 第9卷 第4期 页码 472-485 doi: 10.1007/s11708-015-0373-7
关键词: isolated hybrid power system (IHPS) composite load model static load dynamic load induction motor load model aggregate load
Initiation of Setaria as a model plant
Xianmin DIAO,James SCHNABLE,Jeffrey L. BENNETZEN,Jiayang LI
《农业科学与工程前沿(英文)》 2014年 第1卷 第1期 页码 16-20 doi: 10.15302/J-FASE-2014011
关键词: Setaria foxtail millet C4 photosynthesis model organism
A time−space porosity computational model for concrete under sulfate attack
《结构与土木工程前沿(英文)》 doi: 10.1007/s11709-023-0985-7
关键词: expansion deformation porosity internal expansion stress external sulfate attack mechanical–chemical coupling model
The Construction of Tetrahedral Model of Engineering Ethical Evaluation
Jin Wang
《工程管理前沿(英文)》 2014年 第1卷 第1期 页码 62-70 doi: 10.15302/J-FEM-2014009
关键词: tetrahedral model ethical evaluation engineering Lamps and Mirrors
Four-protein model for predicting prognostic risk of lung cancer
《医学前沿(英文)》 2022年 第16卷 第4期 页码 618-626 doi: 10.1007/s11684-021-0867-0
Probabilistic model for vessel-bridge collisions in the Three Gorges Reservoir
Bo GENG , Hong WANG , Junjie WANG ,
《结构与土木工程前沿(英文)》 2009年 第3卷 第3期 页码 279-285 doi: 10.1007/s11709-009-0044-z
关键词: vessel-bridge collision probabilistic model parameter statistics
标题 作者 时间 类型 操作
Bayes estimation of residual life by fusing multisource information
Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO
期刊论文
Impact of crude distillation unit model accuracy on refinery production planning
Gang FU, Pedro A. Castillo CASTILLO, Vladimir MAHALEC
期刊论文
Estimation of composite load model with aggregate induction motor dynamic load for an isolated hybrid
Nitin Kumar SAXENA,Ashwani Kumar SHARMA
期刊论文
Initiation of Setaria as a model plant
Xianmin DIAO,James SCHNABLE,Jeffrey L. BENNETZEN,Jiayang LI
期刊论文