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| 1 | An improved process for grain refinement of large 2219 Al alloy rings and its influence on mechanical properties显示文摘The large 2219 Al alloy rings used to connect propellant tank components of a satellite launch vehicle to each other are conventionally manufactured by radial-axial ring rolling at 460°C with 50% deformation,but often suffer from coarse elongated grain and low ductility. An improved process(hot ring rolling at460°C with 30% deformation, then air cooling to 240°C, followed by ring rolling at 240°C with 20% deformation) was tested for ring manufacturing. The corresponding microstructure evolution and mechanical properties of the produced rings were studied. The results show that the improved process can successfully be applied to manufacture the large 2219 Al alloy rings without formation of macroscopic defects,resulting in a product with fine and uniform grains after heat treatment. The fracture mechanism of both rings was mainly intergranular fracture. With the resulting grain size refinement due to the improved process, more homogeneous slip occured and the crack propagation path became more tortuous during the tensile testing process. Thus, the elongation in all three orthogonal directions was greatly improved,and the axial elongation increased from 3.5% to 10.0%. | Hailin He Youping Yi Shiquan Huang Yuxun Zhang | 2019 | Journal of Materials Science & Technology2019，35，1： | 9 |
| 2 | STRESS FIELD ANALYSIS OF EXTRA-HEIGHT FORGING DIE USING FINITE ELEMENT METHOD显示文摘TheextraheightforgingdieinSouthewestAluminiumFabricationPlantisaspecialdieformakingarmamentandspecialcivilproductsinChina.A... | Xiaobo Liu Jianping Tan Youping Yi | 1999 | Journal of Central South University1999，11，1： | 3 |
| 3 | Emergency medical rescue efforts after a major earthquake: lessons from the 2008 Wenchuan earthquake显示文摘 | Lulu Zhang Xu Liu Youping Li Yuan Liu Zhipeng Liu Juncong Lin Ji Shen Xuefeng Tang Yi Zhang Wannian Liang | 2012 | The Lancet2012，，9818： | 1 |
| 4 | Development and analysis of a longitudinal and torsional type ultrasonic motor with two stators显示文摘 | YI Youping SEEMANN W GAUSMANN R | 2005 | Ultrasonics2005，43，： | 1 |
| 5 | Development of a tRNA-derived small RNA diagnostic and prognostic signature in liver cancer显示文摘Liver cancer presents divergent clinical behaviors.There remain opportunities for molecular markers to improve liver cancer diagnosis and prognosis,especially since tRNA-derived small RNAs(tsRNA)have rarely been studied.In this study,a random forests(RF)diagnostic model was built based upon tsRNA profiling of paired tumor and adjacent normal samples and validated by independent validation(IV).A LASSO model was used to developed a seven-tsRNA-based risk score signature for liver cancer prognosis.Model performance was evaluated by a receiver operating characteristic curve(ROC curve)and Precision-Recall curve(PR curve).The five-tsRNA-based RF diagnosis model had area under the receiver operating characteristic curve(AUROC)88%and area under the precision–recall curve(AUPR)87%in the discovery cohort and 87%and 86%in IV-AUROC and IV-AUPR,respectively.The seven-tsRNA-based prognostic model predicts the overall survival of liver cancer patients(Hazard Ratio 2.02,95%CI 1.36–3.00,P<0.001),independent of standard clinicopathological prognostic factors.Moreover,the model successfully categorizes patients into high-low risk groups.Diagnostic and prognostic modeling can be reliably utilized in the diagnosis of liver cancer and high-low risk classification of patients based upon tsRNA characterization. | Yi Zuo Shaoqiu Chen Lingling Yan Ling Hu Scott Bowler Emory Zitello Gang Huang Youping Deng | 2022 | Genes & Diseases2022，9，2： | 1 |
| 6 | APPLICATION OF FRACTAL METHOD TO OPTIMUM AND DECOUPLING DESIGN OF ELECTROMECHANICAL SYSTEM显示文摘APPLICATIONOFFRACTALMETHODTOOPTIMUMANDDECOUPLINGDESIGNOFELECTROMECHANICALSYSTEMZhongJueYiYoupingChenJie(ColegeofMechanicaland... | Jue Zhong Youping Yi Jie Chen | 1998 | Journal of Central South University1998，10，1： | 1 |
| 7 | Development and analysis of a longitudinal and torsional type ultrasonic motor with two stators显示文摘 | YI Youping SEEMANN Wolfgang GAUSMANN Rainer | 2005 | Ultrasonics2005，43，： | 1 |
| 8 | 单流连铸连轧系统超薄板带轧制规程数学模型显示文摘单流连铸连轧生产线是一种新的冶金流程。在这种流程中可以生产厚度小于1mm的热轧带钢。超薄热轧板带的生产过程受到很多约束条件的限制,典型的限制包括板带精轧温度,板带氧化,轧辊过热和最高轧制速度等参数。研究了在单流连铸连轧生产线中生产热轧超薄带钢的可行性,基于机械、传热、冶金原理建立了相关的轧制规程模型,并根据不同的准则对轧制规程进行了优化。研究结果表明在单流连铸连轧生产线上热轧奥氏体超薄带钢可以象生产普通热轧低碳钢产品一样进行生产,超薄带钢生产过程中,轧辊的寿命特别轧辊表面的最高温度对于轧制规程的制订有较大的影响。 | Zhou Shunxin(中) Yi Youping Zhong Jue 薛展(译) 张健民(校) | 2006 | 世界钢铁2006，6，2： | 0 |
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