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Diagnosis and Treatment Protocol for COVID-19 Patients (Tentative 9th Version)

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Infectious Diseases & Immunity 2022年第3期2卷 135-144页

作者： Wang H. The General Office of National health Commission &the General Office of National Administration of Traditional Chinese Medicine

In order to further improve the diagnosis and treatment of COVID-19,we organized experts to revise the relevant content of the Diagnosis and Treatment Protocol for COVID-19 Patients(Tentative 8 th Version),and develop... 详细信息

关键词： diagnosis ID Version

Review on hydrogen Embrittlement of Press-hardened Steels for Automotive Applications

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Acta Metallurgica Sinica(English Letters) 2023年第7期36卷 1123-1143页

作者： Z.wang Q.Lu Z.h.Cao h.Chen M.X.huang J.F.wang General Motors China Science Lab Shanghai201206China Department of Mechanical Engineering The University of Hong KongPokfulam RoadHong Kong999077China Key Laboratory for Advanced Materials of Ministry of Education School of Materials Science and EngineeringTsinghua UniversityBeijing100084China

Press-hardened steel(PhS)with an ultimate tensile strength(UTS)of 1500 MPa has been widely used in automotive body-in-white in the last two decades,due to its ultra-high strength and excellent formability that is achieved by hot stamping process.however,the application of PhS with UTS exceeding 1500 MPa in automotive industry could be deferred due to the increased risk of hydrogen embrittlement.To reduce this kind of risk,recent research efforts have been focused on various ways to optimize the microstructure of PhS.The present review intends to summarize these efforts,to highlight present solutions to address hydrogen embrittlement,and to shed light on directions for future improvement.The influence of microstructure on the hydrogen embrittlement of PhS has been discussed in terms of both the steel substrate and the surface condition.The substrate part covers the influence of martensite,carbides,inclusions,and retained austenite,while the surface part covers decarburization and oxidation,pre-coating,and trimming.

关键词： hot stamping Press-hardened steels Coating-free hydrogen embrittlement Fracture Al-Si coating

Panic buying? Food hoarding during the pandemic period with city lockdown

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Journal of Integrative Agriculture 2020年第12期19卷 2916-2925页

作者： h.holly wang hAO Na School of Economics&TTGGGI Guizhou UniversityGuiyang 550025P.R.China Department of Agricultural Economics Purdue UniversityIN47907USA School of Economics Beijing Technology and Business UniversityBeijing 100084P.R.China

Food hoarding is prevalent during the COVID-19 pandemic.To investigate the mechanism of urban consumers’food hoarding behaviors,we categorize hoarding motives into rational and irrational ones.Using random online survey samples from three cities in China,we employ the multivariate probit model to investigate the rational and irrational motives on food hoarding behavior.Our results confirmed the existence of both rational and irrational food hoarding,and also found factors attributing to the different buying behaviors.The amount of food at hand and the expectation on the infection possibility of COVID-19 are two major factors affecting rational hoarding.Bad mood and herd psychology are factors contributing to panic buying.This study provides an empirical evidence to support intervention policies aiming at mitigating panic buying behavior.

关键词： consumer hoarding behavior panic buying pandemics lockdown food hoarding

Pressure-induced ferroelectric and anti-ferroelectric phase transitions in LaN

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Science China(Physics,Mechanics & Astronomy) 2023年第2期66卷 122-130页

作者： Chi Ding Jianan Yuan Beatriz h.Cogollo-Olivo Yunlong wang Xiaomeng wang Jian Sun National Laboratory of Solid State Microstructures School of Physics and Collaborative Innovation Center of Advanced MicrostructuresNanjingUniversityNanjing 210093China Applied Math Institute University of CartagenaCartagena de Indias 130001Colombia

In this work,we focus on the structural and electronic properties of lanthanum mono-nitride s under high pressure.Based on firstprinciples calculations and crystal structure predictions,we identified an anti-ferroelectric orthogonal phase with space group Pbcm.It is predicted to be thermodynamically stable from 20 to 60 GPa,above which the tetragonal phase without the antiferroelectric distortion will substitute it.however,the anti-ferroelectric distortion can be enhancedby reducing the pressure,and a phase transition to a NiAs-type(B8,P63/mmc) structure occurs at about 20 GPa.The calculated double-well potential for La atoms along the c direction in the B8 phase reveals that it should exhibit ferroelectric properties at low temperatures.Enthalpy calculations well confirm their phase transition sequences under high pressure.Electtonic properties calculations suggest that all the newly identified phases are semiconductors and the corresponding structural distortions can increase their bandgaps.When increasing the pressure to 50 GPa,the tetragonal phase undergoes a semiconductor-to-semimetal transition.Taking the spin-orbit coupling into account,the semimetal phase becomes a topological insulator with a small bandgap.Finally,given the similarities between the ionic compounds LaN and BaO,we predict that the most stable phase for BaO at about 25 GPa should also be the anti-ferroelectric orthogonal phase instead of the tetragonal phase.

关键词： ferroelectric phase distortion

Generative Adversarial Network Based heuristics for Sampling-Based Path Planning

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IEEE/CAA Journal of Automatica Sinica 2022年第1期9卷 64-74页

作者： Tianyi Zhang Jiankun wang Max Q.-h.Meng Department of Electronic and Electrical Engineering Southern University of Science and TechnologyShenzhen 518055China

Sampling-based path planning is a popular methodology for robot path planning.With a uniform sampling strategy to explore the state space,a feasible path can be found without the complex geometric modeling of the configuration space.however,the quality of the initial solution is not guaranteed,and the convergence speed to the optimal solution is slow.In this paper,we present a novel image-based path planning algorithm to overcome these limitations.Specifically,a generative adversarial network(GAN)is designed to take the environment map(denoted as RGB image)as the input without other preprocessing works.The output is also an RGB image where the promising region(where a feasible path probably exists)is segmented.This promising region is utilized as a heuristic to achieve non-uniform sampling for the path planner.We conduct a number of simulation experiments to validate the effectiveness of the proposed method,and the results demonstrate that our method performs much better in terms of the quality of the initial solution and the convergence speed to the optimal solution.Furthermore,apart from the environments similar to the training set,our method also works well on the environments which are very different from the training set.

关键词： Generative adversarial network(GAN) optimal path planning robot path planning sampling-based path planning

过渡SST模型模拟椭圆环形翅片管换热器的传热仿真

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Journal of Central South University 2020年第8期27卷 2324-2337页

作者： h NEMATI A R RAhIMZADEh wang Chi-chuan Department of Mechanics Marvdasht BranchIslamic Azad UniversityMarvdashtIran Mechanical Engineering Islamic Azad UniversityBushehr branchBushehrIran Department of Mechanical Engineering National Chiao Tung UniversityHsinchu 300TaiwanChina

本文对椭圆环形翅片管换热器的热流体特性进行了数值模拟研究。采用过渡SST模型对湍流进行了仿真模拟,研究了气流速度、水平/垂直方向翅片直径比以及翅片密度的影响。仿真结果表明,椭圆环形翅片具有优越的性能。在具有相同传热性能的情... 详细信息

本文对椭圆环形翅片管换热器的热流体特性进行了数值模拟研究。采用过渡SST模型对湍流进行了仿真模拟,研究了气流速度、水平/垂直方向翅片直径比以及翅片密度的影响。仿真结果表明,椭圆环形翅片具有优越的性能。在具有相同传热性能的情况下,环形椭圆翅片的压降仅为圆环形翅片的一半。竖直椭圆环形翅片可能含有比圆环形翅片具有更优的热传导性能。利用相关性系数估算环形翅片的Nu数和压降,相关性系数和模拟结果在压降和传热系数上的最大偏差分别为5.6%和3.2%。为从第二定律的角度进一步阐述椭圆环形翅片的优越性,对归一化熵产生进行了研究。在所有情况下,圆环形翅片的熵产生率均高于椭圆环形翅片的。

关键词：环形翅片椭圆翅片熵产过渡SST模型管束

The emerging applications of pillararene architectures in supramolecular catalysis

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Chinese Chemical Letters 2022年第1期33卷 89-96页

作者： Kaiya wang Xueqi Tian Jacobs h.Jordan Krishnasamy Velmurugan Leyong wang Xiao-Yu hu College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China The Southern Regional Research Center Agricultural Research ServiceUSDANew OrleansLA 70124United States Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

Over the last decade,numerous research efforts have been devoted to pillar[n]arenes since their debut.The popularity of pillararenes is a reflection of current research trend in supramolecular and macrocyclic chemistry in general.Among the vast applications(such as chemosensors,drug delivery,transmembrance channels,and separation)of pillararenes,their utilization in catalysis is a relatively less explored area.however,soaring attention has been paid by researchers in recent years and this field has seen gradual increasing publications.Therefore,in this review we will discuss progress in the emerging applications of pillararene architectures in catalysis based on various reaction genre including reduction,oxidation,coupling,decomposition and others.Furthermore,this review not only focuses on the pillararenes based current progress in catalysis,but also provides the signs for future development in this research field.

关键词： Supramolecular catalysis host–guest chemistry Macrocycles Pillararene Self-assembly

Modeling neuropsychiatric disorders using human induced pluripotent stem cells

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Protein & Cell 2020年第1期11卷 45-59页

作者： Meiyan wang Lei Zhang Fred h.Gage Laboratory of Genetics The Salk Institute for Biological Studies10010 N.Torrey Pines RdLa JollaCA 92037USA Neurobiology Section Division of Biological SciencesUniversity of California San DiegoLa JollaCA 92093USA

Neuropsychiatric disorders are complex disorders characterized by heterogeneous genetic variations,variable symptoms,and widespread changes in anatomical pathology.In the context of neuropsychiatric disorders,limited access to relevant tissue types presents challenges for understanding disease etiology and developing effective treatments.Induced pluripotent stem cells(iPSCs)reprogrammed from patient somatic cells offer an opportunity to recapitulate disease development in relevant cell types,and they provide novel approaches for understanding disease mechanisms and for development of effective treatments.here we review recent progress and challenges in differentiation paradigms for generating disease-relevant cells and recent studies of neuropsychiatric disorders using human pluripotent stem cell(hPSC)models where cellular phenotypes linked to disease have been reported.The use of iPSC-based disease models holds great promise for understanding disease mechanisms and supporting discovery of effective treatments.

关键词： neuropsychiatric disorders iPSCs brain organoid schizophrenia autism spectrum disorder bipolar disorder

A new thermodynamically stable Nb_(2)Ni intermetallic compound phase revealed by peritectoid transition within binary Nb-Ni alloy system

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Journal of Materials Science & Technology 2022年第5期100卷 246-253页

作者： J.F.Zhao h.P.wang B.Wei School of Physical Science and Technology Northwestern Polytechnical UniversityXi’an 710072China

A new intermetallic compound of thermodynamically stable Nb_(2)Ni phase is discovered within Nb-Ni binary system,refreshing the current situation that there are only three stable intermediate phases of Nb_(7)Ni_(6),NbNi_(3) and NbNi_(8).The new stable phase is generated from the peritectoid transition:(Nb)+Nb_(7)Ni_(6)→Nb_(2)Ni,and the transformation temperature is 1533 K.This refreshes the current equilibrium Nb-Ni binary phase diagram.It is confirmed by transmission electron microscopy and the annealing experiments,which is determined to be the FCC structure(Pearson:cF96,space grope:Fd-3m O2,a=11.888A).Furthermore,the equilibrium properties of Nb_(2)Ni phase are produced by density functional theory,including the formation energy,cohesive energy,bulk modulus and lattice constant.

关键词： Intermetallic compound Peritectoid transition Transmission electron microscopy Density functional theory Nb alloy