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基于Unity3D的杀爆战斗部对相控阵雷达毁伤评估可视化设计与实现

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兵器装备工程学报 2024年第2期45卷 9-15页

作者：徐祎陈百权马兹浩彭芋程赵勃兴北京理工大学爆炸科学与技术国家重点实验室北京100081 北京理工大学北京100081

为提高战斗部的设计迭代与毁伤评估效率,引入典型相控阵雷达的目标易损性模型,构建了杀爆战斗部威力场计算模型、弹目交会模型以及典型相控阵雷达的毁伤概率计算模型,并基于Unity3D引擎搭建了杀爆战斗部对相控阵雷达的毁伤评估系统。系... 详细信息

为提高战斗部的设计迭代与毁伤评估效率,引入典型相控阵雷达的目标易损性模型,构建了杀爆战斗部威力场计算模型、弹目交会模型以及典型相控阵雷达的毁伤概率计算模型,并基于Unity3D引擎搭建了杀爆战斗部对相控阵雷达的毁伤评估系统。系统能够实现杀爆战斗部的参数化设计、威力场计算以及杀爆战斗部对典型相控阵雷达毁伤概率的计算及毁伤效果的可视化。针对某杀爆战斗部进行试算,系统直观显示了战斗部威力以及对典型相控阵雷达的毁伤效果,设置战斗部落速为100 m/s, CEP为1 m,计算得到了落高为4~7 m,落角在30°~90°的弹目交会条件下战斗部对典型相控阵雷达的毁伤概率。所设计的系统功能完备,可以为杀爆战斗部方案设计及对相控阵雷达的毁伤评估提供支撑,系统开发的思路可以为战斗部威力计算及毁伤评估软件的设计提供参考。

关键词：视景仿真毁伤评估杀爆战斗部预制破片破片威力场相控阵雷达

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一种新型永磁节能和双向缓冲电梯的方案设计

中国电梯 2024年第2期35卷 5-7,10页

作者：汪洲葛阳马子豪常熟理工学院机械工程学院江苏常熟215500

提出了一种新型永磁节能和双向缓冲电梯的方案设计。该方案基于永磁涡流扭矩调节器,通过调整涡流耦合面积,起到调节扭矩的作用,以达到实时平衡对重侧和轿厢侧扭矩,实现节能的目的;同时也可将涡流耦合面积调至最大,用电动机发电产生的扭... 详细信息

提出了一种新型永磁节能和双向缓冲电梯的方案设计。该方案基于永磁涡流扭矩调节器,通过调整涡流耦合面积,起到调节扭矩的作用,以达到实时平衡对重侧和轿厢侧扭矩,实现节能的目的;同时也可将涡流耦合面积调至最大,用电动机发电产生的扭矩缓冲电梯蹾底或冲顶的惯性力,实现双向缓冲作用。该设计方案具有结构简单、易于安装和维护等优点。

关键词：电梯永磁节能装置双向缓冲装置永磁涡流扭矩调节器方案设计

基于短时课间健康促进的中小学活动空间优化设计策略研究

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当代建筑 2024年第1期 44-47页

作者：张宇马梓皓刘畅哈尔滨工业大学建筑与设计学院深圳国际设计学院寒地城乡人居环境科学与技术工业和信息化部重点实验室

学生课间活动作为中小学生活动行为的重要组成部分,对中小学生的身心健康发展有显著影响。本文基于对中小学生健康情况的分析,针对健康水平下降的现状问题,从健康促进理论视角切入中小学校的课间活动空间设计,提出在短时课间内促进学生... 详细信息

学生课间活动作为中小学生活动行为的重要组成部分,对中小学生的身心健康发展有显著影响。本文基于对中小学生健康情况的分析,针对健康水平下降的现状问题,从健康促进理论视角切入中小学校的课间活动空间设计,提出在短时课间内促进学生课间活动行为产生的中小学校课间活动空间设计策略,提高学生的体能水平,缓解学生的心理压力,以期提供更加有利于学生全面发展的健康校园环境。

关键词：健康促进中小学校园环境课间活动空间设计

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火星上的气固流态化模拟实验

化工进展 2024年第8期43卷 4203-4209页

作者：马永丽李沐阳马子皓王浩然王茂隆费瑶寒张露滨刘明言天津大学化工学院天津300350 化学工程联合国家重点实验室(天津大学) 天津300350

为了了解火星上的气固流态化行为,本文应用计算颗粒流体力学方法对不同重力条件下的气固流化床反应器中的流态化现象进行了数值模拟研究。分析了火星环境条件下气固流化床内的流体速度分布特性,探索了床层压力波动特性与环境重力和表观... 详细信息

为了了解火星上的气固流态化行为,本文应用计算颗粒流体力学方法对不同重力条件下的气固流化床反应器中的流态化现象进行了数值模拟研究。分析了火星环境条件下气固流化床内的流体速度分布特性,探索了床层压力波动特性与环境重力和表观气速等因素间的关系。结果表明,在火星环境条件下,提高表观气速可以促进气固流态化的形成和充分发展;但是较高的表观气速会使流化床内的气固流场紊乱程度增加,不利于维持稳定的气固流态化状态。研究结果对于未来在火星上开展物质和能源等就地生产用气固流态化单元操作具有一定的指导意义。

关键词：流化床流态化数值模拟气固火星

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Summer Atmospheric Water Cycle under the Transition Influence of the Westerly and Summer Monsoon over the Yarlung Zangbo River Basin in the Southern Tibetan Plateau

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Advances in Atmospheric Sciences 2024年第5期41卷 830-846页

作者： Qianhui ma Chunyan ZHANG Donghai WANG zihao PANG School of Atmospheric Sciences Sun Yat-sen UniversityGuangdong Province Key Laboratory for Climate Change and Natural Disaster StudiesKey Laboratory of Tropical Atmosphere-Ocean SystemMinistry of EducationZhuhai 519082China Southern marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Guangdong Meteorological Data Center Guangdong Meteorological ServiceGuangzhou 510080China National Observation and Research Station of Coastal Ecological Environments in macao Macao Environmental Research InstituteMacao University of Science and TechnologyMacao SAR 999078China National Meteorological Information Center China Meteorological AdministrationBeijing 100081China

This study compares the summer atmospheric water cycle,including moisture sources and consumption,in the upstream,midstream,and downstream regions of the Yarlung Zangbo River Basin in the southern Tibetan *** evolutions of moisture properties under the influence of the westerly and summer southerly monsoon are examined using 5-yr multi-source measurements and ERA5 reanalysis *** that moisture consumption in this study is associated with clouds,precipitation,and diabatic *** to the midstream and downstream regions,the upstream region has less moisture,clouds,and precipitation,where the moisture is brought by the *** early August,the vertical wet advection over this region becomes enhanced and generates more high clouds and *** midstream region has moisture carried by the westerly in June and by the southerly monsoon from July to *** higher vertical wet advection maximum here forms more high clouds,with a precipitation peak in early *** downstream region is mainly affected by the southerly-driven wet *** rich moisture and strong vertical wet advection here produce the most clouds and precipitation among the three regions,with a precipitation peak in late *** height of the maximum moisture condensation is different between the midstream region(325 hPa)and the other two regions(375 hPa),due to the higher upward motion maximum in the midstream *** diabatic heating structures show that stratiform clouds dominate the upstream region,stratiform clouds and deep convection co-exist in the midstream region,and deep convection systems characterize the downstream region.

关键词： Yarlung Zangbo River Basin atmospheric water cycle constrained variational analysis moisture source and consumption

Mechanical behavior of rock under uniaxial tension:Insights from energy storage and dissipation

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第7期16卷 2466-2481页

作者： Guanshuang Tan Chunde ma Junjie Zhang Wenyuan Yang Guiyin Zhang zihao Kang School of Resources and Safety Engineering Central South UniversityChangsha410083China

many rock engineering projects show that the growth of tensile cracks is often an important cause of engineering disasters,and the mechanical behavior of rocks is essentially the transmission,storage,dissipation and release of *** investigate the tensile behavior of rock from the perspective of energy,uniaxial tension tests(UTTs)and uniaxial compression tests(UCTs)were carried out on three typical rocks(granite,sandstone and marble).Different unloading points were set before the peak stress to separate elastic energy and dissipated *** input energy density ut,elastic energy density ue,and dissipated energy density ud at each unloading point were calculated by integrating stress-strain *** results show that there is a strong linear relationship between the three energy parameters and the square of the unloading stress in UCT,but this linear relationship is weaker in *** ue and ud increase linearly with the increase in ut in UCT and *** on the phenomenon that ue and ud increase linearly with ut,the applicability of W_(et)^(p) index in UTT was proved and the relative energy storage capacity and absolute energy distribution characteristics of three rocks in UCT and UTT were *** tensile behavior of marble and sandstone in UTT can be divided into two stages vaguely according to the energy distribution,but granite is not the *** addition,based on dissipated energy,the damage evolution of three types of rocks in UCT and UTT was *** study provides some new insights for understanding the tensile behavior of rock.

关键词： Uniaxial tension Energy density Mechanical behavior Energy storage coefficient Energy dissipation coefficient

Exceptional high-strain-rate tensile mechanical properties in a CrCoNi medium-entropy alloy

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Science China materials 2022年第3期65卷 811-819页

作者： Peng Gao zihao ma Ji Gu Song Ni Tao Suo Yulong Li Min Song Yiu-Wing mai Xiaozhou Liao School of Aerospace Mechanical&Mechatronic EngineeringThe University of SydneySydneyNSW 2006Australia State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China

Alloys with combined outstanding strength and excellent ductility are highly desirable for many structural ***,alloys subjected to deformation at very high strain rates and/or cryogenic temperatures usually suffer from very limited ***,we demonstrate that a bulk CrCoNi medium-entropy alloy presents exceptional combination of high strength and excellent ductility during deformation at high strain rates over a wide temperature *** tensile stress-strain curves at a high strain rate of 2000s^(-1) and temperatures down to 77 K were successfully obtained using an electromagnetic Hopkinson tension bar system attached with a cooling device,revealing high true ultimate tensile strength(σ_(UTS,T))of 1.8 GPa and true strain of~54% at σ_(UTS,T).These outstanding mechanical properties were mainly attributed to profuse deformation *** high strain rate and cryogenic temperature promoted deformation *** refinement caused by deformation twinning,dislocation slip and dynamic recrystallisation added to work hardening and the excellent tensile strain.

关键词： medium-entropy alloy strength ductility high strain rate cryogenic temperature

Tungsten oxide/nitrogen-doped carbon nanotubes composite catalysts for enhanced redox kinetics in lithium-sulfur batteries

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Chinese Journal of Chemical Engineering 2024年第3期67卷 58-67页

作者： Deqing He zihao Xie Qian Yang Wei Wang Chao Su School of Energy and Power Jiangsu University of Science and TechnologyZhenjiang 212100China State Key Laboratory of materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

The sluggish redox kinetics of polysulfides in lithium-sulfur(Li-S)batteries are a significant obstacle to their widespread adoption as energy storage ***,recent studies have shown that tungsten oxide(WO_(3))can facilitate the conversion kinetics of polysulfides in Li-S ***,we fabricated host materials for sulfur using nitrogen-doped carbon nanotubes(N-CNTs)and WO_(3).We used low-cost components and simple procedures to overcome the poor electrical conductivity that is a disadvantage of metal *** composites of WO_(3) and N-CNTs(WO_(3)/N-CNTs)create a stable framework structure,fast ion diffusion channels,and a 3D electron transport network during electrochemical reaction *** a result,the WO_(3)/N-CNT-Li2S6 cathode demonstrates high initial capacity(1162 ma·h·g^(-1) at 0.5℃),excellent rate performance(618 ma·h·g^(-1) at 5.5℃),and a low capacity decay rate(0.093%up to 600 cycles at 2℃).This work presents a novel approach for preparing tungsten oxide/carbon composite catalysts that facilitate the redox kinetics of polysulfide conversion.

关键词： Li-S batteries Composites Ion diffusion channels 3D electron transport network Redox kinetics

Risk factors for early death in severe non-brain- injured trauma patients

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World Journal of Emergency Medicine 2024年第5期15卷 404-406页

作者： Hui Feng Ronghai Shao zihao Fan Limei ma Jiake Gao Lijun Liu Lichao Fang Jianjun Zhu Department of Emergency and Critical Care Medicine the Second Affi liated Hospital of Soochow UniversitySuzhou 215004China Department of Emergency the First People's Hospital of Taicang(Taicang Affi liated Hospital of Soochow University)Suzhou 215400China Center for Emergency and Critical Care Medicine Beijing Friendship HospitalCapital Medical UniversityBeijing 100050China Department of Emergency and Intensive Care Unit Suzhou Xiangcheng People’s HospitalSuzhou 215131China

Severe trauma is one of the main causes of premature death,posing a significant challenge to public health systems.[1]At present,there is a lack of universally accepted guidelines for rapid detection of life-threatening severe trauma,[2]and the accuracy of existing prognostic models in predicting early death is limited.[3,4]Severe non-brain-injured trauma(SNT)patients account for approximately 70%of all trauma-related ***,there is a lack of studies on early death in SNT patients.[5]This study aims to identify risk factors associated with early death(≤72 h post-admission)in SNT patients.

关键词： death patients trauma