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Typhoon Hato's precipitation characteristics based on PERSIANN

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Tropical Cyclone Research and Review 2021年第2期10卷 75-86页

作者： Jiayang Zhang yangbo chen Chuan Li School of Geography and Planning Sun Yat-Sen UniversityGuangzhouChina

Heavy precipitation induced by typhoons is the main driver of catastrophic flooding,and studying precipitation patterns is important for flood forecasting and early *** the space-time characteristics of heavy precipitation induced by typhoons requires a large range of observation data that cannot be obtained by ground-based rain gauge ***-based estimation provides large domains of precipitation with high space-time resolution,facilitating the analysis of heavy precipitation patterns induced by *** this study,Precipitation Estimation from Remotely Sensed Information Using Artificial Neural Networks(PERSIANN)satellite data were used to study the temporal and spatial features of precipitation induced by Typhoon Hato,which was the strongest typhoon of 2017 to make landfall in *** results show that rainfall on the land lasted for six days from the typhoon making landfall to disappearing,reaching the maximum when the typhoon made *** produced extremely high accumulated rainfall in South China,almost 300 mm in Guangdong Province and Guangxi Zhuang Autonomous Region and 260 mm in Hainan *** rainfall process was separated into three stages and rainfall was the focus in the second stage(5 h before making landfall to 35 h after making landfall).

关键词： Typhoon Satellite estimated precipitation Precipitation characteristics

基于高分辨率工业CT的场(厂)内机动车用进水锂电池检测研究

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CT理论与应用研究（中英文） 2024年第2期33卷 159-166页

作者：杨汉祥郑小腾陈央波宋赟绍兴市特种设备检测院浙江绍兴312071 绍兴市特种设备智能检测与评价重点实验室浙江绍兴312071

近年来,随着动力电池技术的不断发展,越来越多的厂家青睐采用锂电池作为场(厂)内机动车动力源。然而,对场(厂)内机动车用锂电池的安全性能检测一直缺乏相关研究,特别是对故障电池的无损检测,鲜有开展。为此,本文采用高分辨率工业CT对场(... 详细信息

近年来,随着动力电池技术的不断发展,越来越多的厂家青睐采用锂电池作为场(厂)内机动车动力源。然而,对场(厂)内机动车用锂电池的安全性能检测一直缺乏相关研究,特别是对故障电池的无损检测,鲜有开展。为此,本文采用高分辨率工业CT对场(厂)内机动车用故障锂电池进行研究,扫描内部结构,并结合充放电情况分析锂电池性能衰减与内部结构之间的关系,为场(厂)内机动车用锂电池无损检测提供解决方案。

关键词：高分辨率工业CT 无损检测场(厂)内机动车辆锂电池

解毒泻肺合剂治疗老年重症肺炎(痰热壅肺证)临床观察

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中国中医急症 2024年第10期33卷 1773-1776页

作者：刘振航谢婷张凯李娜陈扬波浙江中医药大学浙江杭州310053 浙江省立同德医院浙江杭州311122

目的观察解毒泻肺合剂治疗老年重症肺炎(痰热壅肺证)患者的疗效并探寻其作用机制。方法将60例患者采用随机数字表法分为对照组与观察组各30例。对照组给予西医常规治疗,观察组在西医常规治疗的基础上予解毒泻肺合剂鼻饲,治疗周期14 d... 详细信息

目的观察解毒泻肺合剂治疗老年重症肺炎(痰热壅肺证)患者的疗效并探寻其作用机制。方法将60例患者采用随机数字表法分为对照组与观察组各30例。对照组给予西医常规治疗,观察组在西医常规治疗的基础上予解毒泻肺合剂鼻饲,治疗周期14 d。比较两组治疗效果。结果治疗后观察组中医整体有效率为80.00%,高于对照组的63.33%(P <0.05);观察组治疗后C反应蛋白(CRP)、白细胞计数(WBC)、白细胞介素-6(IL-6)下降更明显(P <0.05),急性生理与慢性健康评分(APACHEⅡ评分)、临床肺部感染评分(CPIS评分)改善更显著(P <0.05)。结论解毒泻肺合剂可减轻炎症反应,改善临床症状,治疗老年重症肺炎(痰热壅肺证)患者疗效显著。

关键词：老年重症肺炎解毒泻肺合剂痰热壅肺临床观察

Flood modeling of Sungai Pinang Watershed under the impact of urbanization

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热带气旋研究与评论：英文版 2021年第2期10卷 96-105页

作者： Sazali Osman Lingfang chen Abdul Hafiz Mohammad Lixue Xing yangbo chen National Flood Forecasting and Warning Centre Department of Irrigation and DrainageKuala LumpurMalaysia School of Geography and Planning Sun Yat-Sen UniversityGuangzhouChina

Urbanization has been a worldwide development trend,which regulates river courses,impervious surfaces and drainage *** causes hydrological effects,including increased runoff volumes,peak discharges and flow *** manuscript selects the Malaysian Sungai Pinang watershed as a case study to illustrate these land use,channel and flooding changes of Asian coastal *** Landsat satellite remote sensing images were first used to estimate the land use/land cover changes of the Sungai Pinang watershed by using SVM algorithm,and the results shows the urbanization was very rapid in the past decades,with the urbanization rate reached 46.41%in 2018 based on the build area *** channel characteristics also changed significantly,from natural river to concrete *** flood resilience measures for coastal cities experiencing urbanization are also proposed for development and flood ***,a flood forecasting model of the Sungai Pinang watershed is established *** simulation results of the Liuxihe model constructed in this study conforms to hydrological regularities and can provide a technical reference for flood control and disaster ***,it is necessary to pay attention to the uncertainty of the forecast results.

关键词： Flood forecasting Liuxihe model Urbanization Pinang watershed

A novel domain decomposition-based model for efficient dynamic predictions of large composite machine tools

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Science China(Technological Sciences) 2024年第6期67卷 1765-1782页

作者： YU yangbo JI Yu Lei chen YanRen XU Kun BI QingZhen State Key Laboratory of Mechanical System and Vibration School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai200240China

We propose a large combined moving component composed of carbon fiber reinforced polymer(CFRP)laminates for making lightweight machine tools with high dynamic *** accurate dynamic prediction of composite machine tools is essential for the new generation machine *** paper aims to address two challenges in numerical dynamic modeling and the design of composite machine tools to enhance development efficiency.(1)Anisotropic composite laminates,which form the composite machine tool,exhibit coupling in various *** propose the generalized continuity condition of the boundary to tackle this dynamic modeling challenge.(2)Composite machine tools feature numerous composite-metal coupled *** mechanical model correction of isotropic metals is performed to address their *** take the example of a five-axis gantry machine tool with composite moving parts,establish a dynamic model for efficient prediction,and verify it through simulation and *** proposed method yields remarkable results,with an average relative error of only 3.85%in modal frequency prediction and a staggering 99.7%reduction in solution time compared to finite element *** further discuss the dynamic performance of the machine tool under varied stacking angles and layer numbers of the composite machine *** propose general design criteria for composite machine tools to consider the modal frequency and manufacturing cost of machine tools.

关键词： machine tool dynamics carbon fiber reinforced polymer composite laminates

Flood forecasting scheme of Nanshui reservoir based on Liuxihe model

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Tropical Cyclone Research and Review 2021年第2期10卷 106-115页

作者： Feng Zhou yangbo chen Liyang Wang Sheng Wu Guangzhe Shao School of Geography and Planning Sun Yat-Sen UniversityGuangzhouChina Guangdong Yuedian Nanshui Power Generation Co. Ltd.ShaoguanChina

China experiences one of the most frequent flood disasters in the *** accurate and reliable flood prediction program is the key to deal with flood *** Reservoir Basin,in southern China,belongs to subtropical monsoon climate,with more rain in spring,concentrated rainstorm in summer and typhoon storm in *** at dam site are mostly small and medium-sized floods with steep rise and slow fall as typical mountain *** order to explore the applicability of Liuxihe model in flood prediction of Nanshui Reservoir,this paper builds up Liuxihe model for Nanshui Reservoir based on DEM,land use and soil type data,and selects a typical flood event to optimize the parameters using particle swarm optimization(PSO)algorithm and verifies the accuracy of the model by simulating the other *** model established in this paper indicates a satisfactory performance for flood prediction for Nanshui Reservoir,which can meet the accuracy requirement of flood ***,the effects of different river grading and PSO algorithm on flood prediction are *** results show that the PSO algorithm can obviously improve the accuracy of the Liuxihe model for flood forecast in Nanshui *** simulation based on four-level channel grading has better results than that based on three-level channel,which indicates increased peak flood value,delayed peak time and closer simulation to the measured value.

关键词： Nanshui reservoir Liuxihe model Parameter optimization Digital water system

Highly in-plane anisotropy of thermal transport in suspended ternary chalcogenide Ta_(2)NiS_(5)

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Nano Research 2022年第7期15卷 6601-6606页

作者： Yue Su Chuyun Deng Jinxin Liu Xiaoming Zheng Yuehua Wei yangbo chen Wei Yu Xiao Guo Weiwei Cai Gang Peng Han Huang Xueao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Jiujiang Research Institute of Xiamen University Jiujiang 332105China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China

Energy dissipation has always been an attention-getting issue in modern electronics and the emerging low-symmetry two-dimensional(2D)materials are considered to have broad prospects in solving the energy dissipation *** the thermal transport of a typical 2D ternary chalcogenide Ta_(2)NiS_(5) is *** the first time we have observed strongly anisotropic in-plane thermal conductivity towards armchair and zigzag axes of suspended few-layer Ta_(2)NiS_(5) flakes through Raman *** 7-nm-thick Ta_(2)NiS_(5) flakes,theκz i g z a g is 4.76 W·m^(−1)·K^(−1) andκa r m c h a i r is 7.79 W·m^(−1)·K^(−1),with a large anisotropic ratio(κa r m c h a i r/κz i g z a g)of 1.64 mainly ascribed to different phonon mean-free-paths along armchair and zigzag ***,the thickness dependence of thermal anisotropy is also *** the flake thickness increases,theκa r m c h a i r/κz i g z a g reduces sharply from 1.64 to *** could be attributed to the diversity in phonon boundary scattering,which decreases faster in zigzag direction than in armchair *** anisotropic property enables heat flow manipulation in Ta_(2)NiS_(5) based devices to improve thermal management and device *** work helps reveal the anisotropy physics of ternary transition metal chalcogenides,along with significant guidance to develop energy-efficient next generation nanodevices.

关键词： anisotropic thermal conductivity ternary transition metal chalcogenide Ta_(2)NiS_(5) energy dissipation phonon mode

Highly anisotropic thermal conductivity of few-layer CrOCl for efficient heat dissipation in graphene device

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Nano Research 2022年第10期15卷 9377-9385页

作者： Xiaoming Zheng Yuehua Wei Zhenhua Wei Wei Luo Xiao Guo Xiangzhe Zhang Jinxin Liu yangbo chen Gang Peng Weiwei Cai Shiqiao Qin Han Huang Chuyun Deng Xueao Zhang College of Physical Science and Technology Xiamen UniversityXiamen 361005China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Jiujiang Research Institute of Xiamen University Jiujiang 332105China

With the packing density growing continuously in integrated electronic devices,sufficient heat dissipation becomes a serious ***,dielectric materials with high thermal conductivity have brought insight into effective dissipation of waste heat in electronic devices to prevent them from overheating and guarantee the performance *** CrOCl,an antiferromagnetic insulator with low-symmetry crystal structure and atomic level flatness,might be a promising solution to the thermal ***,we have systematically studied the thermal transport of suspended few-layer CrOCl flakes by microRaman *** CrOCl flakes exhibit high thermal conductivities along zigzag direction,from~392±33 to~1,017±46 W·m^(−1)·K^(−1) with flake thickness from 2 to 50 ***,pronounced thickness-dependent thermal conductivity ratio(/from~2.8±0.24 to~4.3±0.25)has been observed in the CrOCl flakes,attributed to the discrepancy of phonon dispersion and phonon surface *** a demonstration to the heat sink application of layered CrOCl,we then investigate the energy dissipation in graphene devices on CrOCl,SiO_(2) and hexagonal boron nitride(h-BN)substrates,*** graphene device temperature rise on CrOCl is only 15.4%of that on SiO_(2) and 30%on h-BN upon the same electric power density,indicating the efficient heat dissipation of graphene device on *** study provides new insights into two-dimentional(2D)dielectric material with high thermal conductivity and strong anisotropy for the application of thermal management in electronic devices.

关键词： CrOCl High thermal conductivity strong anisotropy efficient heat dissipation heat sink graphene devices

Chemokine-like factor 1 (CKLF1) is expressed in myocardial ischemia injury in vivo and in vitro

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BIOCELL 2024年第6期48卷 981-990页

作者： JULING FENG HAODONG chen yangbo LIU QIDI AI YANTAO YANG LEI ZHAO SHIFENG CHU NAIHONG chen School of Pharmacy Department of PharmacyHunan Engineering Technology Center of Standardization and Function of Chinese Herbal Decoction PiecesHunan University of Chinese MedicineChangsha410208China Department of Pharmacology State Key Laboratory of Bioactive Substances and Functions of Natural MedicinesInstitute of Materia Medica&Neuroscience CenterChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing100050China Department of Diagnostics Research Lab of Translational Medicine Hengyang Medical CollegeUniversity of South ChinaHengyang421001China Department of Gastrointestinal Surgery The First Affiliated HospitalHengyang Medical CollegeUniversity of South ChinaHengyang421001China

Introduction:Chemokine-like factor 1(CKLF1)is a chemokine that is overexpressed in several *** previousﬁndings revealed a signiﬁcant increase in CKLF1 expression in the ischemic brain,suggesting its potential as a therapeutic target for ischemic ***:In this study,we examined the expression dynamics of CKLF1 in both in vivo and in vitro models of ischemic cardiac *** infarction(MI)was induced in vivo by ligation of the left anterior descending artery(LAD)of the rat *** levels of CKLF1,Creatine Kinase MB Isoenzyme(CK-MB),and Lactate dehydrogenase(LDH)in the serum were detected using Enzyme-linked immunosorbent assay(ELISA).The expression of CKLF1 in the infarcted area was detected by immunohistochemistry,immunoﬂuorescence,quantitative PCR(qPCR),and Western blotting(WB).H9C2 and AC16 cardiomyocytes cultured in vitro were subjected to oxygen and glucose deprivation(OGD).LDH was used to detect cell damage,and CKLF1 expression was detected by qPCR and ***:CKLF1 mRNA and protein expression were signiﬁcantly increased in h9c2 cells at 1.5 h and in AC16 cells at 4 h after *** serum CK-MB in rats increased signiﬁcantly on theﬁrst day after infarction,while the LDH concentration increased signiﬁcantly on the third day after ***1 blood levels signiﬁcantly increased on theﬁrst day following MI in ***1 expression notably increased in the infarct area on days 1,3,and 7 *** MI tissue,CKLF1 colocalizes with cardiomyocytes,macrophages,and ***:CKLF1 was substantially expressed during myocardial ischemia injury both in vivo and in vitro and was colocalized with macrophages and neutrophils,indicating that CKLF1 is expected to be a biomarker and a drug target for the treatment of myocardial infarction.

关键词： Chemokine-like factor 1 Overexpression Myocardial infarction