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Position-varying surface roughness prediction method considering compensated acceleration in milling
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 855-867 doi: 10.1007/s11465-021-0649-z
关键词: surface roughness prediction compensated acceleration milling thin-walled workpiece
Zhihua ZHANG,Huichen YU,Chengli DONG
《机械工程前沿(英文)》 2015年 第10卷 第4期 页码 418-423 doi: 10.1007/s11465-015-0362-x
Low cycle fatigue tests were conducted on the single crystal nickel-based superalloy, DD6, with different crystallographic orientations (i.e., [001], [011], and [111]) and strain dwell types (i.e., tensile, compressive, and balanced types) at a certain high temperature. Given the material anisotropy and mean stress, both orientation factor and stress range were introduced to the Smith, Watson, and Topper (SWT) stress model to predict the fatigue life. Experimental results indicated that the fatigue properties of DD6 depend on both crystallographic orientation and loading types. The fatigue life of the tensile, compressive, and balanced strain dwell tests are shorter than those of continuous cycling tests without strain dwell because of the important creep effect. The predicted results of the proposed modified SWT stress method agree well with the experimental data.
关键词: life prediction single crystal superalloy low cycle fatigue (LCF) crystallographic orientation strain dwell
《能源前沿(英文)》 doi: 10.1007/s11708-023-0906-4
关键词: lithium-ion batteries RUL prediction double exponential model neural network Gaussian process regression (GPR)
《环境科学与工程前沿(英文)》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1608-1
● Established a quantification method of pollutant emission standard.
关键词: Industrial atmospheric pollutants Pollutant emission standards Quantitative method Machine learning Single enterprise
基于修正Anderson 模型的冲击载荷下地基振动响应预测方法
房波
《中国工程科学》 2014年 第16卷 第11期 页码 96-102
提出了一个预测潜在冲击载荷下振动效应的理论模型与现场实测相结合的综合预测方法。通过一系列具有针对性的室外重锤冲击振动试验,以及现场实测数据对Anderson 模型进行了验证并修正,然后利用修正的Anderson 模型预测冲击荷载的振动效应。将预测结果和现场试验结果进行对比分析,结果表明:预测结果与实测结果吻合较好。
关键词: 预测方法 冲击载荷 振动效应 Anderson 模型
Macro-architectured cellular materials: Properties, characteristic modes, and prediction methods
Zheng-Dong MA
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 442-459 doi: 10.1007/s11465-018-0488-8
Macro-architectured cellular (MAC) material is defined as a class of engineered materials having configurable cells of relatively large (i.e., visible) size that can be architecturally designed to achieve various desired material properties. Two types of novel MAC materials, negative Poisson’s ratio material and biomimetic tendon reinforced material, were introduced in this study. To estimate the effective material properties for structural analyses and to optimally design such materials, a set of suitable homogenization methods was developed that provided an effective means for the multiscale modeling of MAC materials. First, a strain-based homogenization method was developed using an approach that separated the strain field into a homogenized strain field and a strain variation field in the local cellular domain superposed on the homogenized strain field. The principle of virtual displacements for the relationship between the strain variation field and the homogenized strain field was then used to condense the strain variation field onto the homogenized strain field. The new method was then extended to a stress-based homogenization process based on the principle of virtual forces and further applied to address the discrete systems represented by the beam or frame structures of the aforementioned MAC materials. The characteristic modes and the stress recovery process used to predict the stress distribution inside the cellular domain and thus determine the material strengths and failures at the local level are also discussed.
关键词: architectured material cellular materials multi-scale modeling homogenization method effective material properties computational method
张 葵
《中国工程科学》 2015年 第17卷 第1期 页码 103-113
针对低能见度天气的危害性,运用信息数字方法发现了霾的发生、发展与地热的联系和大气结构特征的改变。霾的预测、预防,需要正确把握近地低空大气的滚流状态和热结构特征。霾的形成既有人为排放也有自然界地热引发地下污染物和污浊气体的释放问题,地热可作为霾天气预报的先兆信息。大气环境的改善,需要人们改进排放技术,也需要研究自然污染源问题。
关键词: 能见度;霾;数字化预测;预防策略
An adaptive data-driven method for accurate prediction of remaining useful life of rolling bearings
Yanfeng PENG, Junsheng CHENG, Yanfei LIU, Xuejun LI, Zhihua PENG
《机械工程前沿(英文)》 2018年 第13卷 第2期 页码 301-310 doi: 10.1007/s11465-017-0449-7
A novel data-driven method based on Gaussian mixture model (GMM) and distance evaluation technique (DET) is proposed to predict the remaining useful life (RUL) of rolling bearings. The data sets are clustered by GMM to divide all data sets into several health states adaptively and reasonably. The number of clusters is determined by the minimum description length principle. Thus, either the health state of the data sets or the number of the states is obtained automatically. Meanwhile, the abnormal data sets can be recognized during the clustering process and removed from the training data sets. After obtaining the health states, appropriate features are selected by DET for increasing the classification and prediction accuracy. In the prediction process, each vibration signal is decomposed into several components by empirical mode decomposition. Some common statistical parameters of the components are calculated first and then the features are clustered using GMM to divide the data sets into several health states and remove the abnormal data sets. Thereafter, appropriate statistical parameters of the generated components are selected using DET. Finally, least squares support vector machine is utilized to predict the RUL of rolling bearings. Experimental results indicate that the proposed method reliably predicts the RUL of rolling bearings.
关键词: Gaussian mixture model distance evaluation technique health state remaining useful life rolling bearing
Evaluation method of multiaxial low cycle fatigue life for cubic single crystal material
CHEN Jiping, DING Zhiping
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 278-282 doi: 10.1007/s11465-007-0048-0
关键词: orthotropic regression analysis crystal material multiaxial prediction
Comparison of modeling methods for wind power prediction: a critical study
Rashmi P. SHETTY, A. SATHYABHAMA, P. Srinivasa PAI
《能源前沿(英文)》 2020年 第14卷 第2期 页码 347-358 doi: 10.1007/s11708-018-0553-3
关键词: power curve method of least squares cubic spline interpolation response surface methodology artificial neural network (ANN)
PAN Yong, JIANG Juncheng, WANG Zhirong
《化学科学与工程前沿(英文)》 2007年 第1卷 第4期 页码 390-394 doi: 10.1007/s11705-007-0071-z
关键词: information nonlinear quantitative correlation superior molecular
Minsoo KIM,Yejin KIM,Hyosoo KIM,Wenhua PIAO,Changwon KIM
《环境科学与工程前沿(英文)》 2016年 第10卷 第2期 页码 299-310 doi: 10.1007/s11783-015-0825-7
关键词: influent wastewater prediction data-driven model k-nearest neighbor method (k-NN)
耿庆国
《中国工程科学》 2009年 第11卷 第6期 页码 123-128
根据多年来对旱震关系、强震活动有序性及强磁暴组合法的地震预测探索,就川、甘、青、陕,特别是四川阿坝州地区的地震活动连续3年的研究做了简要的回顾,披露了在汶川地震前的2005 年12 月8 日向中国地震局提交的“关于加强川甘青交界地区强震短临监测和分析预报应急工作的紧急建议”要点。
Junbao JIA,Jincheng XING,Jihong LING,Ren PENG
《能源前沿(英文)》 2016年 第10卷 第4期 页码 459-465 doi: 10.1007/s11708-016-0424-8
关键词: commercial building load prediction multiple linear regression
标题 作者 时间 类型 操作
Position-varying surface roughness prediction method considering compensated acceleration in milling
期刊论文
LCF behavior and life prediction method of a single crystal nickel-based superalloy at high temperature
Zhihua ZHANG,Huichen YU,Chengli DONG
期刊论文
Two-phase early prediction method for remaining useful life of lithium-ion batteries based on a neural
期刊论文
A new prediction method of industrial atmospheric pollutant emission intensity based on pollutant emission
期刊论文
Macro-architectured cellular materials: Properties, characteristic modes, and prediction methods
Zheng-Dong MA
期刊论文
An adaptive data-driven method for accurate prediction of remaining useful life of rolling bearings
Yanfeng PENG, Junsheng CHENG, Yanfei LIU, Xuejun LI, Zhihua PENG
期刊论文
Evaluation method of multiaxial low cycle fatigue life for cubic single crystal material
CHEN Jiping, DING Zhiping
期刊论文
Comparison of modeling methods for wind power prediction: a critical study
Rashmi P. SHETTY, A. SATHYABHAMA, P. Srinivasa PAI
期刊论文
Prediction of the flash points of alkanes by group bond contribution method using artificial neural networks
PAN Yong, JIANG Juncheng, WANG Zhirong
期刊论文
Evaluation of the k-nearest neighbor method for forecasting the influent characteristics of wastewater
Minsoo KIM,Yejin KIM,Hyosoo KIM,Wenhua PIAO,Changwon KIM
期刊论文