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Numerical Study of Heat Transfer Enhancement in the Electric Vehicle Battery via Vortex‑Induced Agitator

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Automotive Innovation 2023年第2期6卷 244-255页

作者： Yubo Lian Yinsheng Liao Jianjian Liu zhiming hu Haolun Xu BYD Auto Industry Company Limited 518118 ShenzhenChina

Convective heat transfer plays an important role in the development of a high-performance battery cell.Electric vehicles carry a large amount of the battery cells to reach a longer range of endurance mileage.Thermal diffusion around the battery cells can be considered as obstacles to improve the convective heat transfer coefficient.In this paper,a novel agitator taking advantage of strong vortices is designed to disrupt the thermal boundary layer around the battery cells,thereby improving the fluid mixing for enhanced convective heat transfer.A fluid–structure interaction algorithm is developed to simulate the convective heat transfer rate at various flapping motion.Under the comparison with clean channel,the vortex-induced vibra-tion by the agitated beam can increase the average Nusselt number by 119.59%.This research can be applied to optimize the thermal-structure design inside the electric vehicle battery.

关键词： Electric vehicle battery Thermal management Fluid–structure interaction Air cooling

Analysis and Prediction Model Reinforced UHPC Shrinkage Property

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Journal of Architectural Research and Development 2024年第2期8卷 99-107页

作者： Shuwen Deng zhiming huang Hao Chen Jia hu hunan Construction Investment Group Changsha 410026China College of Water Resources and Civil Engineering Hunan Agricultural UniversityChangsha 410128China Key Laboratory for Wind and Bridge Engineering of hunan Province School of Civil EngineeringHunan UniversityChangsha 410082China

This paper explores the shrinkage of reinforced UHPC under high-temperature steam curing and natural curing conditions.The results are compared with the existing shrinkage prediction models.The results show that the maximum shrinkage strain of reinforced UHPC after steam curing is 164μεand gradually becomes zero.As for natural curing,the maximum shrinkage strain is 173μεand the value stabilizes on the 10th day after pouring.This indicated that steam curing can significantly reduce shrinkage time.Compared with the plain UHPC tested in the previous literature,the structural reinforcement can significantly inhibit the UHPC shrinkage and greatly reduce the risk of cracking due to shrinkage.By comparing the results in this paper with the existing models for predicting the shrinkage strain development,it is found that the formula recommended in the French UHPC structural and technical specification is suitable for the shrinkage curve in the present paper.

关键词： Ultra-high performance concrete(UHPC) UHPC shrinkage Reinforced UHPC slab Shrinkage prediction

Effect of Support Height on Microstructure and Mechanical Properties of Selective Laser Melting Ti-15Mo Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第12期36卷 1947-1960页

作者： Libo Zhou Xisheng Bi Jinshan Sun zhiming hu Cong Li Jian Chen Yanjie Ren Yan Niu Wei Qiu Wei Chen Institute of Energy and Power Engineering Changsha University of Science and TechnologyChangsha410114China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha410083China

In this research,for the first time,the Ti-15Mo alloy generated via selective laser melting(SLM)with many different support heights was examined.With the increase of the support height,the risks of forming microcracks and small holes increase while the ductility of the sample decreases.The grain sizes of the samples decrease with an increase in support height because of the more efficient heat dissipation rate during the SLM process.The average grain sizes of the samples are 36.95±0.7μm(5 mm-sample I),35.24±0.7μm(10 mm-sample II)and 33.91±0.7μm(15 mm-sample III),respectively.As the support height increases,the intensity of(111)texture increases and the misorientation angles gradually decrease.The ultimate tensile strength,yield strength and ductility of the three samples are 970±13 MPa,769±12 MPa and 9.78%±1.5%(sample I),1051±11 MPa,932±11 MPa and 7.17%±2%(sample II),1123±14 MPa,1089±9 MPa and 5.4%±1.4%(sample III),respectively.The decrease in grain size,increase in dislocation density and enhancement of the(111)texture are all conducive to achieving the higher strength.

关键词： Selective laser melting Titanium alloy Support height Microstructure

Phase II study of novel orally PI3Kα/δinhibitor TQ-B3525 in relapsed and/or refractory follicular lymphoma

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Signal Transduction and Targeted Therapy 2024年第5期9卷 2193-2201页

作者： huaqing Wang Jifeng Feng Yanyan Liu Zhengzi Qian Da Gao Xuehong Ran hui Zhou Lihong Liu Binghua Wang Meiyun Fang Hebing Zhou Zhenqian huang Shi Tao Zhuowen Chen Liping Su Hang Su Yu Yang Xiaobao Xie huijing Wu Ping Sun Guoyu hu Aibin Liang zhiming Li Department of Oncology Tianjin Union Medical Center of Nankai UniversityTianjin 300121PR China The Institute of Translational Medicine Tianjin Union Medical Center of Nankai UniversityTianjin 300121PR China Department of Medical Oncology Jiangsu Cancer HospitalThe Affiliated Cancer Hospital of Nanjing Medical UniversityNanjing 210009PR China Department of Medical Oncology Henan Cancer HospitalThe Affiliated Cancer Hospital of Zhengzhou UniversityZhengzhou 450003PR China Department of Medical Oncology Tianjin Medical University Cancer Institute and HospitalTianjin 300060PR China Department of Hematology The Affiliated Hospital of Inner Mongolia Medical College010050 HohhotPR China Department of Hematology Weifang People’s HospitalThe First Affiliated Hospital of Weifang Medical University261000 WeifangPR China Department of Lymphoma&Hematology Hunan Cancer HospitalThe Affiliated Cancer Hospital of Xiangya School of MedicineCentral South University410013 ChangshaPR China Department of Hematology The Fourth Hospital of Hebei Medical University and Hebei Tumor Hospital050011 ShijiazhuangPR China Department of Lymphoma Weihai Central Hospital264400 WeihaiPR China Department of Hematology and Rheumatology The Affiliated Zhongshan Hospital of Dalian University116001 DalianPR China Department of Hematology Beijing Luhe Hospital101199 BeijingPR China Department of Hematology The First Affiliated Hospital of Guangzhou Medical University510120 GuangzhouPR China Department of Hematology The First Affiliated Hospital of Hainan Medical College570102 HaikouPR China Department of Hematology The First People’s Hospital of Foshan528000 FoshanPR China Department of Hematology Shanxi Cancer Hospital030013 TaiyuanPR China Department of Lymphoma Senior Department of HematologyThe Fifth Medical Center of Chinese PLA General Hospital100039 BeijingPR China Department of Lymphoma and Head and Neck Cancer Fujian Cancer Hospital350014 FuzhouPR China Department of Hematology The First People’s Hospit

This registration study assessed clinical outcomes of TQ-B3525,the dual phosphatidylinositol-3-kinase(PI3K)α/δinhibitor,in relapsed and/or refractory follicular lymphoma(R/R FL).This phase II study(ClinicalTrials.gov NCT04324879.Registered March 27,2020)comprised run-in stage and stage 2.R/R FL patients after≥2 lines therapies received oral 20 mg TQ-B3525 once daily in a 28-day cycle until intolerable toxicity or disease progression.Primary endpoint was independent review committee(IRC)-assessed objective response rate(ORR).Based on results(ORR,88.0%;duration of response[DOR],11.8 months;progression-free survival[PFS],12.0 months)in 25 patients at run-in stage,second stage study was initiated and included 82 patients for efficacy/safety analysis.Patients received prior-line(median,3)therapies,with 56.1%refractory to previous last therapies;73.2%experienced POD24 at baseline.At stage 2,ORR was 86.6%(71/82;95%CI,77.3-93.1%),with 28(34.2%)complete responses.Disease control rate was 95.1%due to 7(8.5%)stable diseases.Median time to response was 1.8 months.Among 71 responders,median DOR was not reached;18-month DOR rate was 51.6%.with median follow-up of 13.3 months,median PFS was 18.5(95%CI,10.2-not estimable)months.Median overall survival(OS)was not reached by cutoff date;24-month OS rate was estimated as 86.1%.Response rates and survival data were consistent across all subgroups.Grade 3 or higher treatment-related adverse events were observed in 63(76.8%)cases,with neutropenia(22.0%),hyperglycemia(19.5%),and diarrhea(13.4%)being common.TQ-B3525 showed favorable efficacy and safety for R/R FL patients after≥2 lines prior therapies.

关键词： lymphoma assessed initiated

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面向知识图谱的会话式机器阅读理解研究综述

计算机工程与应用 2024年第3期60卷 17-28页

作者：胡娟奚雪峰崔志明苏州科技大学电子与信息工程学院江苏苏州215000 苏州市虚拟现实智能交互及应用技术重点实验室江苏苏州215000 苏州智慧城市研究院江苏苏州215000

对话式机器阅读理解随着数据集的发展而发展,目的在于让机器在理解文章内容的基础上能够进行多轮对话。但现有的模型方法无法从对话历史中捕获到与当前问题最相关的历史信息,模型的推理能力较差,很难获取实体间的隐含信息。知识图谱应... 详细信息

对话式机器阅读理解随着数据集的发展而发展,目的在于让机器在理解文章内容的基础上能够进行多轮对话。但现有的模型方法无法从对话历史中捕获到与当前问题最相关的历史信息,模型的推理能力较差,很难获取实体间的隐含信息。知识图谱应用于推理问答是当前的一大研究热点。知识图谱技术可以推断出实体间的隐含关系,应用于推理问答则能够提升模型的推理问答能力,提高预测的准确率。近年来,知识图谱推理技术的广泛应用,极大地推动了知识图谱推理问答的发展。对基于知识图谱的会话式机器阅读理解从三方面进行总结:介绍了会话式机器阅读理解领域的数据集以及当前的一些典型的模型方法,并对模型的性能和优缺点作了简要的分析与比较;介绍了知识图谱的定义、架构以及四大核心技术,并简要介绍了三大类知识图谱推理问答的模型方法;最后总结工作,并根据会话式机器阅读理解的数据集特点和知识图谱推理问答模型的缺点,对未来的研究重点进行展望。

关键词：机器阅读理解多轮对话知识图谱知识图谱推理问答

加工工艺对高强度15-5PH钢力学性能与侵彻性能的影响

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北京理工大学学报 2024年第3期44卷 251-259页

作者：程军吴巍胡志明张笑瀛 63863部队吉林白城137001 湖南航天有限责任公司飞行器技术分公司湖南长沙410205 南京理工大学机械工程学院江苏南京210094

为获得加工工艺对高强度钢性能的影响,选取激光选区熔化(selective laser melting,SLM)和锻造工艺加工弹丸,通过镜像观测、准静态、SHPB和混凝土侵彻等研究手段,对比分析了三种SLM制造工艺以及锻造工艺对于15-5PH钢性能的影响.结果表明,... 详细信息

为获得加工工艺对高强度钢性能的影响,选取激光选区熔化(selective laser melting,SLM)和锻造工艺加工弹丸,通过镜像观测、准静态、SHPB和混凝土侵彻等研究手段,对比分析了三种SLM制造工艺以及锻造工艺对于15-5PH钢性能的影响.结果表明,SLM技术细化了15-5PH钢组织的晶粒,SLM成型的15-5PH钢力学性能有提升,其中SLM-B工艺的提升效果明显,SLM-B成型的15-5PH钢的准静态屈服强度相较于锻造工艺提升幅度达13.1%;其动态屈服强度相较于锻造工艺钢提高了9.0%;且SLM-B工艺对弹丸抗磨蚀性能最好.试验结果表明SLM工艺提高了15-5PH钢力学性能和抗磨蚀能力.

关键词：激光选区熔化 15-5PH钢力学性能侵彻磨蚀

Light at night and lung cancer risk:A worldwide interdisciplinary and time-series study

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Chinese Medical Journal Pulmonary and Critical Care Medicine 2024年第1期2卷 56-62页

作者： Runchen Wang Qixia Wang Jianfu Li Jianrong Zhang Shixuan Lyu Wenhao Chi zhiming Ye Xuanzhuang Lu Ying Shi Yubin Wang Xinjian Wu Ruiyu hu Mónica Pérez-Ríos Jianxing He Wenhua Liang Department of Thoracic Surgery and Oncology The First Affiliated Hospital of Guangzhou Medical UniversityState Key Laboratory of Respiratory DiseaseNational Clinical Research Center for Respiratory DiseaseGuangzhou Institute of Respiratory HealthGuangzhouGuangdong 510120China Department of Respiratory Disease China State Key Laboratory of Respiratory Disease and National Clinical Research Center for Respiratory DiseaseThe First Affiliated Hospital of Guangzhou Medical UniversityGuangzhouGuangdong 510120China Centre for Cancer Research&Department of General Practice Faculty of MedicineDentistry and Health SciencesUniversity of MelbourneVictorian Comprehensive Cancer CentreMelbourneVictoria 3010Australia Department of Civil Engineering University of BristolBristolBS81TRUK Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Nanshan School Guangzhou Medical UniversityGuangzhouGuangdong 511436China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan UniversityWuhanHubei 430079China GNSS Research Center Wuhan UniversityWuhanHubei 430079China First Clinical School Guangzhou Medical UniversityGuangzhouGuangdong 511436China Preventive Medicine and Public Health Department University of Santiago de CompostelaCIBER de Epidemiología y Salud Pública(CIBERESP)Health Research Institute of Santiago de Compostela(IDIS)Santiago de CompostelaGalicia 15782Spain Southern Medical University GuangzhouGuangdong 510515China

Background:Light at night(LAN)has become a concern in interdisciplinary research in recent years.This global interdisciplinary study aimed to explore the exposure-lag-response association between LAN exposure and lung cancer incidence.Methods:LAN data were obtained from the Defense Meteorological Satellite Program’s Operational Linescan System.Data of lung cancer incidence,socio-demographic index,and smoking prevalence of populations in 201 countries/territories from 1992 to 2018 were collected from the Global Burden of Disease Study.Spearman correlation tests and population-weighted linear regression analysis were used to evaluate the correlation between LAN exposure and lung cancer incidence.A distributed lag nonlinear model(DLNM)was used to assess the exposure-lag effects of LAN exposure on lung cancer incidence.Results:The Spearman correlation coefficients were 0.286-0.355 and the population-weighted linear regression correlation coefficients were 0.361-0.527.After adjustment for socio-demographic index and smoking preva-lence,the Spearman correlation coefficients were 0.264-0.357 and the population-weighted linear regression correlation coefficients were 0.346-0.497.In the DLNM,the maximum relative risk was 1.04(1.02-1.06)at LAN exposure of 8.6 with a 2.6-year lag time.After adjustment for socio-demographic index and smoking prevalence,the maximum relative risk was 1.05(1.02-1.07)at LAN exposure of 8.6 with a 2.4-year lag time.Conclusion:High LAN exposure was associated with increased lung cancer incidence,and this effect had a specific lag period.Compared with traditional individual-level studies,this group-level study provides a novel paradigm of effective,efficient,and scalable screening for risk factors.

关键词： Light at night Satellite imagery Lung cancer Distributed lag nonlinear model(DLNM) Melatonin

Temporal continuity of visual attention for future gaze prediction in immersive virtual reality

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Virtual Reality & Intelligent Hardware 2020年第2期2卷 142-152页

作者： zhiming hu Sheng LI Meng GAI Department of Computer Science and Technology School of Electronic Engineering and Computer SciencePeking UniversityBeijing 100871China Beijing Engineering Technology Research Center of Virtual Simulation and Visualization Peking UniversityBeijing 100871China

Background Eye tracking te chnology is receiving increased attention in the field of virtual reality.Specifically,future gaze prediction is crucial in pre-computation for many applications such as gaze-contingent rendering,advertisement placement,and content-based design.To explore future gaze prediction,it is necessary to analyze the temporal continuity of visual attention in immersive virtual reality.Methods In this paper,the concept of temporal continuity of visual attention is presented.Subsequently,an autocorrelation function method is proposed to evaluate the temporal continuity.Thereafter,the temporal continuity is analyzed in both free-viewing and task-oriented conditions.Results Specifically,in free-viewing conditions,the analysis of a free-viewing gaze dataset indicates that the temporal continuity performs well only within a short time interval.A task-oriented game scene condition was created and conducted to collect users'gaze data.An analysis of the collected gaze data finds the temporal continuity has a similar performance with that of the free-viewing conditions.Temporal continuity can be applied to future gaze prediction and if it is good,users'current gaze positions can be directly utilized to predict their gaze positions in the future.Conclusions The current gaze's future prediction performances are further evaluated in both free-viewing and task-oriented conditions and discover that the current gaze can be efficiently applied to the task of short-term future gaze prediction.The task of long-term gaze prediction still remains to be explored.

关键词： Temporal continuity Visual attention Autocorrelation analysis Gaze prediction Virtual reality

Toward automatic estimation of urban green volume using airborne LiDAR data and high resolution Remote Sensing images

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Frontiers of Earth Science 2013年第1期7卷 43-54页

作者： Yan huANG Bailang YU Jianhua ZHOU Chunlin hu Wenqi TAN zhiming hu Jianping WU Key Laboratory of Geographic Information Science (Ministry of Education) East China Normal University Shanghai 200241 China Shanghai Landscape and City Appearance Administration Information Center Shanghai 200040 China

Urban green volume is an important indicator for analyzing urban vegetation structure, ecological evaluation, and green-economic estimation. This paper proposes an object-based method for automated estimation of urban green volume combining three-dimensional （3D） information from airborne Light Detection and Ranging （LiDAR） data and vegetation information from high resolution remotely sensed images through a case study of the Lujiazui region, Shanghai, China. High resolution airborne near-infrared photographs are used for identifying the urban vegetation distribution. Airborne LiDAR data offer the possibility to extract individual trees and to measure the attributes of trees, such as tree height and crown diameter. In this study, individual trees and grassland are identified as the independent objects of urban vegetation, and the urban green volume is computed as the sum of two broad portions： individual trees volume and grassland volume. The method consists of following steps： generating and filtering the normalized digital surface model （nDSM）, extracting the nDSM of urban vegetation based on the Normalized Difference Vegetation Index （NDVI）, locating the local maxima points, segment- ing the vegetation objects of individual tree crowns and grassland, and calculating the urban green volume of each vegetation object. The results show the quantity and distribution characteristics of urban green volume in the Lujiazui region, and provide valuable parameters for urban green planning and management. It is also concluded from this paper that the integrated application of LiDAR data and image data presents an effective way to estimate urban green volume.

关键词： Urban areas Vegetation mapping Remote sensing Environmental quality