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薄壁件选区激光熔化成形精度控制分析及优化

重庆理工大学学报（自然科学） 2024年第4期38卷 100-107页

作者：祝世超丁雨露施书杰龙兵陈荣华尹飞鸿赵景波常州工学院航空与机械工程学院江苏常州213032 常州工学院汽车工程学院江苏常州213032

为了解决薄壁件选区激光熔化成形(selective laser melting,SLM)过程中残余应力引起的变形问题,保证成形精度,以SLM制备的钛合金雷达屏蔽器为研究对象,使用固有应变法对其进行变形分析和应力分析。提出了一种基于体素仿真模型的反变形... 详细信息

为了解决薄壁件选区激光熔化成形(selective laser melting,SLM)过程中残余应力引起的变形问题,保证成形精度,以SLM制备的钛合金雷达屏蔽器为研究对象,使用固有应变法对其进行变形分析和应力分析。提出了一种基于体素仿真模型的反变形补偿方法,并对其进行实验验证。结果表明:SLM制备的屏蔽器残余应力和位移较大,最大分别达831 MPa和0.61 mm。经过反变形补偿后,屏蔽器表面区域的整体变形量偏差从0.582 mm下降到0.438 mm以内,误差减少24.7%,从而保证了屏蔽器的打印质量。

关键词：选区激光熔化固有应变法有限元分析反变形补偿

Intelligent and connected vehicles： Current status and future perspectives

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Science China(Technological Sciences) 2018年第10期61卷 1446-1471页

作者： YANG DianGe JIANG Kun ZHAO ding YU ChunLei CAO Zhong XIE shichao XIAO ZhongYang JIAO XinYu WANG SiJia ZHANG Kai State Key Laboratory of Automotive Safety and Energy Department of Automotive Engineering Collaborative Innovation Center of Intelligent New Energy Vehicle Tsinghua University Beijing 100084 China University of Michigan Transportation Research Institute Ann Arbor MI 48109 USA

Intelligent connected vehicles(ICVs) are believed to change people's life in the near future by making the transportation safer,cleaner and more comfortable. Although many prototypes of ICVs have been developed to prove the concept of autonomous driving and the feasibility of improving traffic efficiency, there still exists a significant gap before achieving mass production of high-level ICVs. The objective of this study is to present an overview of both the state of the art and future perspectives of key technologies that are needed for future ICVs. It is a challenging task to review all related works and predict their future perspectives, especially for such a complex and interdisciplinary area of research. This article is organized to overview the ICV key technologies by answering three questions: what are the milestones in the history of ICVs; what are the electronic components needed for building an ICV platform; and what are the essential algorithms to enable intelligent driving? To answer the first question, the article has reviewed the history and the development milestones of ICVs. For the second question, the recent technology advances in electrical/electronic architecture, sensors, and actuators are presented. For the third question, the article focuses on the algorithms in decision making, as the perception and control algorithm are covered in the development of sensors and actuators. To achieve correct decision-making, there exist two different approaches: the principle-based approach and data-driven approach. The advantages and limitations of both approaches are explained and analyzed. Currently automotive engineers are concerned more with the vehicle platform technology, whereas the academic researchers prefer to focus on theoretical algorithms. However, only by incorporating elements from both worlds can we accelerate the production of high-level ICVs.

关键词： intelligent connected vehicle (ICV) autonomous driving artificial intelligence advanced driver assistance systems(ADAS) electrical/electronic architecture (EEA) environmental perception decision-making ICV computation platform

Geochronology and zircon geochemistry of auriferous intrusions in the Bumo deposit,Hainan Province,China

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Acta Geochimica 2022年第2期41卷 208-225页

作者： Yan Hai Bingtao Li Teng Deng Deru Xu Li Wang Youzhong Xiong Xiaowen Zhang Zhiling Wang Shaohao Zou Zhengpeng ding Qian Qian shichao Guo School of Earth Sciences East China University of TechnologyNanchang 330013China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Zhaojin Group Co. LtdDongfang 572600HainanChina Jiangxi Engineering Laboratory on Radioactive Geoscience and Big Data Technology East China University of TechnologyNanchang 330013JiangxiChina Resource and Environment Survey Institute of Hainan Province Haikou 570206China School of Geosciences and Info-Physics Central South UniversityChangsha 410083China

Intrusion-related gold deposits(IRGS)are a lowgrade,large-tonnage exploration ***,auriferous magmatic rocks were found in the Bumo deposit of the Gezhen shear zone in Hainan Province,***,the geochronology and geochemical characteristics of the intrusions,as well as the mineralization potential,are still *** and petrographic work show that the sulfidebearing intrusions can be divided into diorite porphyrites,quartz monzodiorites and *** LA–ICP–MS U–Pb dating demonstrates that diorite porphyrites,quartz monzodiorites and monzodiorites were formed at104±1,114±1,114±1 Ma,*** addition,sulfides in Yanshanian intrusion-related gold mineralization haveδ;S values of 0.2–4.4%,lower than those in Hercynian-Indosinian(1.9–9.8%)orogenic deposits(ca.219–378 Ma)in the Gezhen shear *** addition,all these intrusions display close correlations between Eu/EuN*with Th/U,consistent with the differentiation of amphibole,apatite and titanite from a hydrous ***,zircon Eu/EuN*in the intrusions are higher than0.4,demonstrating that the magmatic rocks have high water contents and oxygen fugacity values,favorable for gold ***,the Yanshanian magmatic rocks can be a new potential gold exploration target in the Gezhen shear zone.

关键词： Hainan Bumo Intrusion-related mineralization Zircon trace elements Gold mineralization

基于SLM钛合金方向舵退火工艺仿真分析与优化

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机械设计与制造工程 2024年第1期53卷 25-29页

作者：丁雨露祝世超吴政洋龙兵陈荣华尹飞鸿常州工学院航空与机械工程学院江苏常州213300

以SLM方法制备的钛合金方向舵为研究对象,采用固有应变法对其进行残余应力和变形分析,提出基于体单元仿真模型的退火工艺,并对其进行有限元仿真分析及工艺参数优化。结果表明:SLM方法制备的钛合金方向舵残余应力和变形量均较大,通过全... 详细信息

以SLM方法制备的钛合金方向舵为研究对象,采用固有应变法对其进行残余应力和变形分析,提出基于体单元仿真模型的退火工艺,并对其进行有限元仿真分析及工艺参数优化。结果表明:SLM方法制备的钛合金方向舵残余应力和变形量均较大,通过全交实验进行工艺参数优化后,方向舵的残余应力从1 206.96 MPa下降到143.86 MPa,变形量从8.63 mm减小到2.08 mm。

关键词：激光选区熔化固有应变法退火工艺仿真

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Electrolyte induced synergistic construction of cathode electrolyte interphase and capture of reactive free radicals for safer high energy density lithium-ion battery

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Journal of Energy Chemistry 2023年第12期87卷 207-214,I0006页

作者： Mengfei ding Xuning Feng Yong Peng Jing Jing Tong Bowen Hou Yalan Xing Weifeng Zhang Li Wang Yu Wu Jiabin Lv Chunyan Luo Dejun Xiong shichao Zhang Minggao Ouyang School of Materials Science and Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Intelligent Green Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Vehicle and Mobility Tsinghua UniversityBeijing 100084China School of Mechanical and Electronic Control Engineering Beijing Jiaotong UniversityBeijing 100044China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Farasis Energy(GanZhou)Co.Ltd GanZhou 341000JiangxiChina

As the energy density of battery increases rapidly,lithium-ion batteries(LIBs)are facing serious safety issue with thermal runaway,which largely limits the large-scale applications of high-energy-density *** is generally agreed that the chemical crosstalk between the cathode and anode leads to thermal runaway of ***,a multifunctional high safety electrolyte is designed with synergistic construction of cathode electrolyte interphase and capture of reactive free radicals to limit the intrinsic pathway of thermal *** cathode electrolyte interphase not only resists the gas attack from the anode but suppresses the parasitic side reactions induced by *** the function of free radical capture has the ability of reducing heat release from thermal runaway of *** dual strategy improves the intrinsic safety of battery prominently that the triggering temperature of thermal runaway is increased by 24.4℃and the maximum temperature is reduced by 177.7℃.Simultaneously,the thermal runaway propagation in module can be ***,the electrolyte design balances the trade-off of electrochemical and safety performance of high-energy *** capacity retention of LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)|graphite pouch cell has been significantly increased from 53.85%to 97.05%with higher coulombic efficiency of 99.94%at operating voltage extended up to 4.5 V for 200 ***,this work suggests a feasible strategy to mitigate the safety risk of high-energy-density LIBs without sacrificing electrochemical performances.

关键词： Lithium-ion battery Electrolyte Battery safety Thermal runaway

Exploring Seasonal and Circadian Rhythms in Structural Traits of Field Maize from LiDAR Time Series

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Plant Phenomics 2021年第1期3卷 389-403页

作者： shichao Jin Yanjun Su Yongguang Zhang Shilin Song Qing Li Zhonghua Liu Qin Ma Yan Ge LingLi Liu Yanfeng ding Frédéric Baret Qinghua Guo Plant Phenomics Research Centre Academy for Advanced Interdisciplinary StudiesCollaborative Innovation Centre for Modern Crop Production Co-Sponsored by Province and MinistryJiangsu Key Laboratory for Information AgricultureNanjing Agricultural UniversityNanjing 210095China Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology International Institute for Earth System SciencesNanjing UniversityNanjingJiangsu 210023China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China National Technique Innovation Center for Regional Wheat Production/Key Laboratory of Crop Ecophysiology Ministry of AgricultureNanjing Agricultural UniversityNanjing210095 JiangsuChina Department of Forestry Mississippi State UniversityMississippi State 39759USA Environnement Méditerranéen et Modélisation des Agro-Hydrosystèmes(EMMAH) Institut National de la Recherche AgronomiqueUnitéMixte de Recherche 1114 Domaine Saint-PaulAvignon Cedex 84914France Department of Ecology College of Environmental Sciencesand Key Laboratory of Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

Plant growth rhythm in structural traits is important for better understanding plant response to the ever-changing *** laser scanning(TLS)is a well-suited tool to study structural rhythm under field *** studies have used TLS to describe the structural rhythm of trees,but no consistent patterns have been ***,whether TLS can capture structural rhythm in crops is ***,we aim to explore the seasonal and circadian rhythms in maize structural traits at both the plant and leaf levels from time-series *** seasonal rhythm was studied using TLS data collected at four key growth periods,including jointing,bell-mouthed,heading,and maturity *** rhythms were explored by using TLS data acquired around every 2 hours in a whole day under standard and cold stress *** showed that TLS can quantify the seasonal and circadian rhythm in structural traits at both plant and leaf levels.(1)Leaf inclination angle decreased significantly between the jointing stage and bell-mouthed *** azimuth was stable after the jointing stage.(2)Some individual-level structural rhythms(e.g.,azimuth and projected leaf area/PLA)were consistent with leaf-level structural rhythms.(3)The circadian rhythms of some traits(e.g.,PLA)were not consistent under standard and cold stress conditions.(4)Environmental factors showed better correlations with leaf traits under cold stress than standard *** was the most important factor that significantly correlated with all leaf traits except leaf *** study highlights the potential of time-series TLS in studying outdoor agricultural chronobiology.

关键词： crops heading traits

m6A RNA methylation-mediated HNF3γ reduction rendershepatocellular carcinoma dedifferentiation and sorafenibresistance

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Signal Transduction and Targeted Therapy 2021年第1期6卷 144-157页

作者： Tengfei Zhou shichao Li Daimin Xiang Junyu Liu Wen Sun Xiuliang Cui Beifang Ning Xiao Li Zhuo Cheng Weiqi Jiang Cheng Zhang Xijun Liang Liang Li Xin Cheng Liu Hui Hongyang Wang Jin ding International Cooperation Laboratory on Signal Transduction Eastern Hepatobiliary Surgery Hospital/InstituteThe Second Military Medical UniversityShanghaiChina Department of Gastroenterology Changzheng HospitalThe Second Military Medical UniversityShanghaiChina Shanghai Institutes for Biological Sciences Chinese Academy of SciencesShanghaiChina The Third Department of Hepatic Surgery Eastern Hepatobiliary Surgery HospitalThe Second Military Medical UniversityShanghaiChina National Center for Liver Cancer ShanghaiChina Tongji University School of Medicine ShanghaiChina

Hepatocyte nuclear factor 3γ(HNF3γ)is a hepatocyte nuclear factor,but its role and clinical significance in hepatocellular carcinoma(HCC)remain ***,we report that HNF3γexpression is downregulated in patient HCC and inversely correlated with HCC malignancy and patient ***,our data suggested that the HNF3γreduction in HCC could be mediated by METTL14-dependent m6A methylation of HNF3γ***3γexpression was increased during hepatic differentiation and decreased in dedifferentiated HCC ***,HNF3γdelivery promoted differentiation of not only HCC cells but also liver CSCs,which led to suppression of HCC *** analysis suggested an HNF3γ-centered regulatory network that includes essential liver differentiation-associated transcription factors and functional molecules,which could synergistically facilitate HCC cell *** importantly,enforced HNF3γexpression sensitized HCC cells to sorafenib-induced growth inhibition and cell apoptosis through transactivation of OATP1B1 and OATP1B3 expression,which are major membrane transporters for sorafenib *** investigation showed that patient-derived HCC xenografts with high HNF3γexpression exhibited a sorafenib response and patients with high HCC HNF3γlevels benefited from sorafenib ***,these results suggest that HNF3γplays an essential role in HCC differentiation and may serve as a therapeutic target and predictor of sorafenib benefit in patients.

关键词： sorafenib hepatocellular mediated

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心脏外科术后患者早期运动能力的观察

临床心电学杂志 2024年第3期33卷 181-185页

作者：陆世杰李振宇乔志钰丁耀东杨祎郭世超夏瑀葛翼鹏朱俊明郑铁首都医科大学附属北京安贞医院大血管中心 100029

目的通过心肺运动试验观察心脏外科术后患者早期的运动能力特点。方法纳入安贞医院行心脏外科术后早期心肺运动试验的患者,接受心脏外科手术后3个月内行心肺运动试验的患者40例,以手术日至心肺运动试验检查日的天数将患者分为出院组(术... 详细信息

目的通过心肺运动试验观察心脏外科术后患者早期的运动能力特点。方法纳入安贞医院行心脏外科术后早期心肺运动试验的患者,接受心脏外科手术后3个月内行心肺运动试验的患者40例,以手术日至心肺运动试验检查日的天数将患者分为出院组(术后30天内,20例)、术后1月组(术后30~60天,10例)和术后2月组(术后60~90天,10例),探讨不同时段心脏外科术后患者的运动能力特点;另将20例出院组按手术类型又分为大血管组(9例)、搭桥组(6例)和瓣膜组(5例),并进一步观察不同手术类型患者出院时(术后30天内)的运动能力,即观察不同时段和不同手术类型的所有患者从静息开始运动到无氧阈强度时的心率变化、收缩压变化,以及心肺运动试验指标(无氧阈、峰值摄氧量及二氧化碳通气当量)。结果所有患者均完成无氧阈值以上的心肺运动试验,未发生运动意外等不良事件。(1)不同时段患者的运动能力:出院组达到无氧阈时的心率上升(8.8±7.1)次/分,显著低于术后1月组[(17.0±5.9)次/分]和术后2月组[(18.3±10.5)次/分],且差异有统计学意义(P0.05);各组患者收缩压变化值及二氧化碳通气当量的组间差异均无统计学意义(P>0.05);(2)术后30天内不同手术类型患者的运动能力:大血管组和搭桥组术后患者的无氧阈[(7.2±1.3)和(7.8±0.7)m L/(kg·min)]及峰值摄氧量[(10.4±2.9)和(9.4±1.3)m L/(kg·min)],分别明显低于瓣膜组[(9.6±1.5)m L/(kg·min)及(14.2±2.3)m L/(kg·min)],且差异有统计学意义(P<0.05)。结论心脏外科术后患者的运动能力在术后30~60天显著提高,而大血管术和搭桥术患者术后30天内的运动能力明显低于瓣膜术后患者。

关键词：心脏外科手术心肺运动试验无氧阈

基于绿色溶剂的聚酰胺纳米纤维膜制备及其空气过滤性能

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纺织学报 2023年第1期44卷 56-63页

作者：周文俞建勇张世超丁彬东华大学纺织学院上海201620 东华大学纺织科技创新中心上海201620

为避免在聚酰胺纳米纤维过滤材料制备和使用过程中甲酸等溶剂对人体和环境的潜在危害,采用乙醇(溶剂)和水(非溶剂)通过静电纺丝技术制备了绿色溶剂型聚酰胺纳米纤维膜,分析了纺丝液中乙醇与水的质量比对溶液性质和纤维成形的影响,研究... 详细信息

为避免在聚酰胺纳米纤维过滤材料制备和使用过程中甲酸等溶剂对人体和环境的潜在危害,采用乙醇(溶剂)和水(非溶剂)通过静电纺丝技术制备了绿色溶剂型聚酰胺纳米纤维膜,分析了纺丝液中乙醇与水的质量比对溶液性质和纤维成形的影响,研究了纳米纤维膜本体结构与空气过滤性能之间的关系。结果表明:在聚酰胺/乙醇溶液体系中加入适量的水能减小纤维直径,但过量的水又会使纤维直径增大,当溶剂中乙醇与水质量比为9:1时,聚酰胺纤维最细,平均直径为332 nm;该聚酰胺纳米纤维膜具有小孔径(0.7μm左右)、高孔隙率(84%)的孔结构,对最易穿透粒径颗粒物PM_(0.3)具有较好的过滤性能,过滤效率为99.02%,阻力压降为158 Pa,品质因子为0.0293 Pa^(-1)。

关键词：绿色溶剂静电纺丝聚酰胺纳米纤维膜空气过滤过滤材料