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400℃退火对ECAP形变Q235钢的强度和位错强化的影响

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江苏大学学报（自然科学版） 2012年第3期33卷 342-344,358页

作者：樊曙天许晓静江苏大学机械工程学院江苏镇江212013

将经过淬火预处理和等通道转角挤压加工(ECAP)的Q235钢进行400℃退火.采用拉伸试验、X射线衍射(XRD)分析及描述强度-位错密度关系的Taylor公式,研究400℃退火对ECAP形变低碳钢的强度和位错强化的影响.拉伸试验表明:400℃退火使ECAP形变Q... 详细信息

将经过淬火预处理和等通道转角挤压加工(ECAP)的Q235钢进行400℃退火.采用拉伸试验、X射线衍射(XRD)分析及描述强度-位错密度关系的Taylor公式,研究400℃退火对ECAP形变低碳钢的强度和位错强化的影响.拉伸试验表明:400℃退火使ECAP形变Q235钢强度降低,屈服强度从825 MPa下降到725 MPa,加工硬化能力和塑性显著提高.基于XRD分析和Taylor公式的定量计算说明,400℃退火对ECAP形变Q235钢的位错强化影响很小,实际强度的降低不是来自于位错强化的降低,而是来自于其他强化机制(晶界、亚晶界等)的降低.

关键词： Q235钢 ECAP加工退火强度位错强化

Anthocyanin Biosynthesis Gene Analysis of Lonicera caerulea L. by RNA-seq and DGE

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Agricultural Biotechnology 2019年第1期8卷 10-12,16页

作者： Qingtian ZHANG Changyu LI shutian fan Yiming YANG Jun AI Shandong Institute of Pomology Institute of Special Animal and Plant sciences Chinese Academy of Agricultural Sciences

Fruit of Lonicera caerulea L. is a rich source of phenolic compounds such as phenolic acids as well as anthocyanins,proanthocyanidins and other flavonoids,which display potential health-promoting effects. However,its genetics and genomic information is limited. Transcriptome and digital gene expression( DGE) profiles of fruit at four different development stages were compared. Related genes with anthocyanin biosynthesis were compared using real-time quantitative PCR( qRT-PCR). RNA-Seq generated 6. 26-Gb clean reads,which was then de novo assembled into 45,656 UniG enes with a mean length 837 bp. A total of 7 928 unigenes were annotated into 32 known metabolic or signaling pathways in which a few primary,intermediate,and secondary metabolic pathways are directly related to fruit quality. The result of DGE and qRT-PCR indicates that UFGT( comp20132_c0) may play a key role in honeysuckle coloration. This provides a reference for the study of complicated metabolism in non-model perennial species.

关键词： Lonicera caerulea L. RNA-Seq DGE Transcriptome

基于神经网络的金属切削毛刺专家系统的研究及应用

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中国机械工程 2005年第12期16卷 1039-1041,1064页

作者：朱云明王贵成樊曙天江苏大学镇江212013

机械加工中毛刺的形成与存在影响、制约着精密与超精密加工和自动化加工技术的发展。基于神经网络理论,构建并开发了金属切削毛刺专家系统(Ujs),通过对神经网络的设计,并作为推理机制,以数据库为训练样本,建立了毛刺形态、尺寸与切削条... 详细信息

机械加工中毛刺的形成与存在影响、制约着精密与超精密加工和自动化加工技术的发展。基于神经网络理论,构建并开发了金属切削毛刺专家系统(Ujs),通过对神经网络的设计,并作为推理机制,以数据库为训练样本,建立了毛刺形态、尺寸与切削条件之间的映射模型,应用于金属切削毛刺的控制及预报。结合车削实验,比较了系统预报结果与实验结果,取得了较好的吻合。神经网络专家系统的建立为解决毛刺预报与控制提供了一条有效的途径。

关键词：金属切削毛刺预报专家系统神经网络

Applying DNA Barcoding to Identify Actinidia in the Northeast of China

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Agricultural Biotechnology 2018年第2期7卷 130-136页

作者： Haishuang LIU Hongyan QIN Jun AI Huifang SONG Yiming YANG shutian fan Peilei XU Guangli SHI Changyu LI Institute of Special Animal and Plant Sciences Chinese Academy of Agricultural SciencesChangchun 30112China

Identification of kiwifruit germplasm materials is the basis of protecting and utilizing these ***,identifying Actinidia arguta varieties based on morphology is difficult,especially for *** this study,we collected 180 specimens comprising 60 varieties of three species(***,***,and ***)from the Northeast of *** emphasis of our study was on the feasibility of identifying *** ***,we used common analysis methods(genetic distance,phylogenetic analysis and the DNA barcoding gap)and SNPs analysis to evaluate the discriminatory power of different DNA barcoding *** results revealed that common methods were insufficient to identify *** varieties but SNPs analysis based on DNA barcoden was the potential method for identifying *** ***,Our study agree that DNA barcoding could be used to analysis the evaluation genetic relationship of the Actinidia plants.

关键词： Actinidia arguta DNA barcoding SNP Identification

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双转台五坐标机床RTCP功能的研究

制造技术与机床 2009年第12期 74-77页

作者：樊曙天杨伟平江苏大学机械工程学院江苏镇江212013

五轴加工中由于旋转运动的影响,会产生非线性误差。RTCP(绕刀具中心点旋转)功能可使数控系统自动对旋转轴的运动进行实时线性补偿,从而保证插补点始终位于编程轨迹上。在深入分析双转台五坐标机床运动原理的基础上,介绍了一种集成RTCP... 详细信息

五轴加工中由于旋转运动的影响,会产生非线性误差。RTCP(绕刀具中心点旋转)功能可使数控系统自动对旋转轴的运动进行实时线性补偿,从而保证插补点始终位于编程轨迹上。在深入分析双转台五坐标机床运动原理的基础上,介绍了一种集成RTCP功能的插补算法,并在MATLAB中做了仿真计算。计算结果表明该算法可以有效减小非线性误差。

关键词：线性插补非线性误差 RTCP功能

Modifiable risk factors for esophageal cancer in endoscopic screening population:A modeling study

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Chinese Medical Journal 2024年第3期137卷 350-352页

作者： Qian Zhang fan Wang Hao Feng Jie Xing Shengtao Zhu Hao Zhang Yang Li Wenqiang Wei shutian Zhang Department of Gastroenterology Beijing Friendship HospitalCapital Medical UniversityNational Clinical Research Center for Digestive DiseaseBeijing Digestive Disease CenterBeijing Key Laboratory for Precancerous Lesion of Digestive DiseaseBeijing 100050China Center for Applied Statistics and School of Statistics Renmin University of ChinaBeijing 100872China Statistical Consulting Center Renmin University of ChinaBeijing 100872China National Cancer Center National Clinical Research Center for CancerCancer InstituteChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Peking Union Medical College Hospital Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Department of Gastroenterology Jizhong Energy Fengfeng Group HospitalHandanHebei 056000China RSS and China-Re Life Joint Lab on Public Health and Risk Management Renmin University of ChinaBeijing 100872China

To the Editor:Esophageal cancer,one of the most common cancer types in China,with an estimated 346,633 new cases and 323,600 deaths in 2022,is becoming an increasingly serious clinical and public health problem.^([1])The successful promotion of the self-management strategy has indicated that lifestyle modifications can be valuable in the primary prevention of cancer *** a healthy lifestyle has become a novel strategy for primary prevention and risk reduction in high-risk *** epidemiological studies have identified several lifestyle-related risk factors for esophageal cancer,including smoking and diet.^([2])Each factor can typically explain a modest proportion of cancer ***,when combined,these known risk factors may substantially affect the risk of esophageal ***,some risk factors for esophageal cancer are non-modifiable,including age,low socioeconomic status,and family *** and how these non-modifiable risk factors affect primary cancer prevention by intervening with modifiable risk factors remain unclear.

关键词： esophageal prevention promotion

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金属切削毛刺形成的有限元模型及机理分析

应用基础与工程科学学报 2005年第2期13卷 180-184,i002-i003页

作者：朱云明王贵成王志樊曙天江苏大学机械学院江苏镇江212013

金属切削毛刺是影响精密零件棱边质量及使用性能的主要因素之一.本研究建立了毛刺形成的有限元模型,并根据其模拟结果分析了毛刺形成的机理,由此将毛刺形成分为三个不同形成机理的阶段.提出了负剪切角及负变形区的概念.在本有限元模型... 详细信息

金属切削毛刺是影响精密零件棱边质量及使用性能的主要因素之一.本研究建立了毛刺形成的有限元模型,并根据其模拟结果分析了毛刺形成的机理,由此将毛刺形成分为三个不同形成机理的阶段.提出了负剪切角及负变形区的概念.在本有限元模型中提出并应用了基于材料失效的切屑分离准则.模拟结果与试验结果进行了比较,取得了教好的吻合.本模型的建立为分析毛刺的形成机理及定量预报提供了一种有意义的探索途径.

关键词：有限元模型毛刺形成机理分析金属切削模拟结果形成机理使用性能精密零件切削毛刺试验结果分离准则材料失效定量预报变形区剪切角切屑

Phononic Band Gaps and Vibrations in Truss-like Materials

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Phononic Band Gaps and Vibrations in Truss-like Materials

第一届工程科学与力学中的计算方法国际会议

作者： shutian Liu and Xian fan Cao State Key Laboratory of Structural Analysis for Industrial Equipment Department of Engineering Mechanics Dalian University of Technology 116024 Dalian China

＜正＞The propagation of elastic waves in infinite periodic truss-like material is investigated. According to Floquet-Bloch theory and the longitudinal oscillation modes of bar, governing equation of the propagation of elastic waves in truss-like material and dispersion equation are obtained. Dispersion characteristics of 1-D and 2-D problems are analyzed, and corresponding phononic band gaps are studied. In 1D one example with complete band gaps is given and the simulation experiment validates the band gaps. In 2D three examples are given to demonstrate the factors of band gap: the properties of materials, size of base cell and cross section areas of every bar. It shows that these base cells have complete band gaps and as the length and width of base cell both increase twofold, the frequencies of band gaps decrease approximately in half.

关键词： band-gap truss-like material dispersion curve

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表面织构改善摩擦磨损性能的研究进展

润滑与密封 2013年第8期38卷 121-124页

作者：邱孝聪樊曙天伍勇江苏大学机械工程学院江苏镇江212013

表面织构能有效改善表面摩擦学性能。介绍表面织构的形态特征及其作用机制,讨论织构分布、织构形状、表面粗糙度、速度和载荷等因素对润滑和摩擦学性能的影响,总结表面织构的研究状况,并分析需要解决的问题。

关键词：表面织构摩擦磨损