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Journal of Iron and Steel Research International 2024年第7期31卷 1746-1762页

作者： Wei Liu Hong-li Zhao bing-xing wang Yong Tian State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819LiaoningChina

The high-strength low-alloy steel plates with varying Ni/Mo contents were manufactured using the thermos-mechanical control *** investigation was conducted to explore the effect of Ni/Mo microalloying on microstructure evolution and mechanical properties of the *** results revealed that the increase in Ni content from 1 to 2 wt.%reduced the transition temperature of ferrite and the growth range of ferritic grain was narrowed,which promoted grain *** optimized combination of grain size,high-angle grain boundaries(HAGBs),and martensite-austenite(M-A)islands parameter contributed to the excellent impact toughness of S1 steel at-100℃(impact absorbed energy of 218.2 J at-100℃).As the Mo increases from 0 to 2 wt.%,the matrix structure changes from multiphase structure to granular bainite,which increases the average effective grain size to~4.62 pm and reduces HAGBs proportion to~36.22%.With these changes,the low-temperature impact toughness of S3 steel is *** addition,based on the analysis of the characteristics of crack propagation path,it was found that M-A islands with low content(~2.21%)and small size(~1.76 pm)significantly retarded crack propagation,and the fracture model of M-A islands with different morphologies was further ***,correlation between behaviour of delamination and toughness was further analysed by observing delamination size and impact energy parameters.

关键词： High-strength low-alloy steel Microstructural regulation Ni addition Mo addition Crack propagation Low-temperature toughness

Effect of Ti-Mg-Ca treatment on properties of heat-affected zone after high heat input welding

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Journal of Iron and Steel Research International 2019年第5期26卷 501-511页

作者： Hao-nan Lou Chao wang bing-xing wang Zhao-dong wang R.D.K. Misra State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 Liaoning China Laboratory for Excellence in Advanced Steels Research Department of Metallurgical Materials and Biomedical Engineering University of Texas at EI Paso EI Faso 79968 TX USA

The combined influence of Mg and Ca treatment on the properties of heat-affected zone (HAZ) of low-carbon steel after high heat input welding was systematically studied. Experimental steels deoxidized with different elements were prepared, i.e., C-Mn steel with Al, Ti-Ca steel with Ti and Ca, Ti-Mg-Ca steel with Ti, Mg and Ca. Results showed that the inclusions in C-Mn steel were mainly Al2O3 and MnS with low density and large size. However, the average size was refined to only ~0.34 μm in Ti-Mg-Ca steel and the amount increased remarkably. Microstructure of simulated HAZ for 200 kJ/cm changed from ferrite side plates or upper bainite to acicular ferrite after treatment with Ti, Mg and Ca. Ca addition decreased the strain field around inclusions and enhanced the ability of acicular ferrite nucleation. In situ observation of Ti-Mg-Ca steel showed that the movement of austenite grain boundaries was retarded and nucleation sites of acicular ferrite were greater than Ti-Ca steel because of Mg addition. Impact energy of HAZ at — 40℃ was increased from 7 to 232 J and showed excellent stability because of Ti-Mg-Ca treatment. High volume fraction of acicular ferrite acted as obstacles toward cleavage cracks.

关键词： Heat-affected zone Microstructure Strain field Impact energy Ca-Mg treatment

An On-line Finite Element Temperature Field Model for Plate Ultra Fast Cooling Process

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Journal of Iron and Steel Research International 2014年第5期21卷 481-487页

作者： Xiao-lin CHEN Guo-dong wang Yong TIAN bing-xing wang Guo YUAN Zhao-dong wang State Key Laboratory of Rolling and Automation Northeastern University

Taking the element specific-heat interpolation function into account, a one-dimensional （l-D） finite ele- ment temperature field model for the on-line control of the ultra fast cooling process was developed based on the heat transfer theory. This 1-D model was successfully implemented in one 4 300 mm plate production line. To improve the calculation accuracy of this model, the temperature-dependent material properties inside an element were considered during the modeling process. Furthermore, in order to satisfy the real-time requirements of the on-line model, the variable bandwidth storage method and the Cholesky decomposition method were used in the programming to storage the data and carry out the numerical solution. The on-line application of the proposed model indicated that the devia- tion between the calculated cooling stop temperature and the measured one was less than ± 15 ℃.

关键词： laminar cooling ultra fast cooling temperature field finite element variable bandwidth storage meth-od Cholesky decomposition method

Wavelength-dependent Photodissociation Dynamics of Benzaldehyde

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Chinese Journal of Chemical Physics 2009年第6期22卷 587-591,J0001页

作者： Ben-kang Liu bing-xing wang Yan-qiu wang Li wang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical Physics Dalian115023 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

The ultrafast dynamics of benzaldehyde upon 260, 271, 284, and 287 nm excitations have been studied by femtosecond pinup-probe time-of-flight mass spectrometry. A bi-exponential decay component model was applied to fit the transient profiles of benzaldehyde ions and fragment ions. At the S2 origin, the first decay of the component was attributed to the internal conversion to the high vibrational levels of S1 state. Lifetimes of the first component decreased with increasing vibrational energy, due to the influence of high density of the vibrational levels. The second decay was assigned to the vibrational relaxation of the S1 whose lifetime was about 600 fs. Upon 287 nm excitation, the first decay became ultra-short （-56 fs） which was taken for the intersystem cross from S1 to T2, while the second decay component was attributed to the vibrational relaxation. The pump-probe transient of fragment was also studied with the different probe intensity at 284 nm pump.

关键词： Benzaldehyde Ultrafast process Femtosecond pump-probe

Inference on the gamma distribution

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Inference on the gamma distribution

Control charts for the coefficient of variation

第十届海峡两岸统计与概率研讨会

作者： bing xing wang Fangtao Wu School of Statistics Zhejiang Gongshang University

This study develops inferential procedures for a gamma distribution. Based on the Cornish-Fisher expansion and pivoting the cumulative distribution function, an approximate confidence interval for the gamma shape parameter is derived. The generalized confidence intervals for the rate parameter and other quantities such as mean are explored. The performance of the proposed procedures is evaluated using Monte Carlo simulation. The simulation results show that the proposed procedures are very satisfactory. Finally, a real example is used to illustrate the proposed procedures.

关键词： gamma distribution confidence interval generalized pivotal quantity coverage probability

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Control charts for the coefficient of variation

Microstructure characteristics of Ti-43Al alloy during twin-roll strip casting and heat treatment

第十届海峡两岸统计与概率研讨会

作者： Baocai Guo bing xing wang School of Statistics Zhejiang Gongshang University

The coefficient of variation(CV) has received an extensive attention in quality control. The existing control charts for monitoring the two-sided changes in the CV do not consider the average run length(ARL) unbiased. In practice, practitioner prefers the ARL-unbiased control chart. This paper proposes an ARL-unbiased control chart to monitor the two-sided shifts in the CV. Then an ARL-unbiased synthetic chart in which the CRL sub-chart only needs a lower control limit is proposed to improve the performance of the ARL-unbiased chart. Comparison results show that the synthetic chart outperforms the ARL-unbiased control chart in terms of the ARL. The effects of parameter estimation on the proposed charts are also studied. Finally, a real example is used to illustrate the proposed control charts.

关键词： coefficient of variation average run length unbiased control chart parameter estimation

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Transactions of Nonferrous Metals Society of China 2019年第5期29卷 1017-1025页

作者： Mang XU Guo-huai LIU Tian-rui LI bing-xing wang Zhao-dong wang State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China

To shorten the fabrication process of difficult-to-form TiAl sheets, twin-roll strip casting and microstructural control were investigated in Ti-43Al alloy. A crack-free sheet with dimensions of 1000 mm × 110 mm × 2 mm was obtained. The microstructure of stip casting sheets and heat treatments was systematically studied. The macrostructure consisted of columnar crystals extending inward and centrally located equiaxed crystals with severe Al segregation were observed along the thickness direction, due to the symmetrical solidification process and decreasing cooling rates. The strip casting alloy was characterized by fine duplex microstructure with a grain spacing of 20-30 μm and a lamellar spacing of 10-20 nm. Furthermore, multiple microstructures of near gamma, nearly lamellar and fully lamellar were obtained through heat treatment process with significantly improved homogeneity of the microstructure.

关键词： strip casting TiAl alloy sheet fabrication microstructure characterization heat treatment

嵌入备件库存的设备运维闭环控制系统仿真研究

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系统仿真学报 2018年第10期30卷 3817-3825页

作者：李冰王星轩华王薛苑郑州大学管理工程学院河南郑州450001

高度可靠的设备运行维护系统是企业安全生产的关键与生命线。研究一类嵌入备件库存的设备运维控制系统。该系统由备件库存子系统、设备作业子系统和设备维修子系统以串并混合形式连接,从而形成多级闭环形态。设备运维闭环控制系统属于... 详细信息

高度可靠的设备运行维护系统是企业安全生产的关键与生命线。研究一类嵌入备件库存的设备运维控制系统。该系统由备件库存子系统、设备作业子系统和设备维修子系统以串并混合形式连接,从而形成多级闭环形态。设备运维闭环控制系统属于一类离散事件动态系统,用传统数学解析方法难以描述,利用Simulink仿真平台建立多级闭环设备运维系统仿真模型并进行数值实验,进而剖析系统设备故障率、维修通道规模及维修效率对系统的整体影响,并分析订货策略对备件库存成本的影响。

关键词：设备运维闭环控制系统排队网络数值仿真

Association between intra-pancreatic fat deposition and diseases of the exocrine pancreas: A narrative review

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World Journal of Gastroenterology 2025年第2期31卷 27-41页

作者： Jing Ye Jian-Guo wang Rong-Qiang Liu Qiao Shi Wei-xing wang Department of General Surgery Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina Department of Pancreatic Surgery Renmin Hospital of Wuhan UniversityWuhan 430060Hubei ProvinceChina

Intrapancreatic fat deposition(IPFD)has garnered increasing attention in recent *** prevalence of IPFD is relatively high and associated with factors such as obesity,age,and ***,the pathophysiological mechanisms underlying IPFD remain unclear,with several potential contributing factors,including oxida-tive stress,alterations in the gut microbiota,and hormonal *** was found to be highly correlated with the occurrence and prognosis of exocrine pan-creatic *** imaging techniques remain the primary diagnostic approach for IPFD,an expanding array of biomarkers and clinical scoring systems have been identified for screening ***,effective treatments for IPFD are not available;however,existing medications,such as glucagon-like peptide-1 receptor agonists,and new therapeutic approaches explored in animal models have shown considerable potential for managing this *** paper reviews the pathogenesis of IPFD,its association with exocrine pancreatic disea-ses,and recent advancements in its diagnosis and treatment,emphasizing the significant clinical relevance of IPFD.

关键词： Intrapancreatic fat deposition Pancreatic steatosis Nonalcoholic fatty pancreas disease Pancreatitis Pancreatic cancer

Multiparameter magnetic resonance imaging-based radiomics model for the prediction of rectal cancer metachronous liver metastasis

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 62-72页

作者： Zhi-Da Long Xiao Yu Zhi-Xiang xing Rui wang Department of Hepatobiliary and Pancreaticosplenic Surgery Jingzhou Hospital Affiliated to Yangtze UniversityJingzhou 434100Hubei ProvinceChina

BACKGROUND The liver,as the main target organ for hematogenous metastasis of colorectal cancer,early and accurate prediction of liver metastasis is crucial for the diagnosis and treatment of ***,this study aims to investigate the application value of a combined machine learning(ML)based model based on the multiparameter magnetic resonance imaging for prediction of rectal metachronous liver metastasis(MLM).AIM To investigate the efficacy of radiomics based on multiparametric magnetic resonance imaging images of preoperative first diagnosed rectal cancer in predicting MLM from rectal *** We retrospectively analyzed 301 patients with rectal cancer confirmed by surgical pathology at Jingzhou Central Hospital from January 2017 to December *** participants were randomly assigned to the training or validation queue in a 7:3 *** first apply generalized linear regression model(GLRM)and random forest model(RFM)algorithm to construct an MLM prediction model in the training queue,and evaluate the discriminative power of the MLM prediction model using area under curve(AUC)and decision curve analysis(DCA).Then,the robustness and generalizability of the MLM prediction model were evaluated based on the internal validation set between the validation queue *** Among the 301 patients included in the study,16.28%were ultimately diagnosed with MLM through pathological *** analysis showed that carcinoembryonic antigen,and magnetic resonance imaging radiomics were independent predictors of ***,the GLRM prediction model was developed with a comprehensive nomogram to achieve satisfactory *** prediction performance of GLRM in the training and validation queue was 0.765[95%confidence interval(CI):0.710-0.820]and 0.767(95%CI:0.712-0.822),*** with GLRM,RFM achieved superior performance with AUC of 0.919(95%CI:0.868-0.970)and 0.901(95%CI:0.850-0.952)in the training and validation queue,respect

关键词： Rectal cancer Metachronous liver metastases Magnetic resonance imaging Radiomics Machine learning