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Physics of cavitation near particles

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Journal of Hydrodynamics 2024年第1期36卷 102-118页

作者： Jia-xin Yu Xiao-yu Wang Jun-wei Shen Jin-sen hu Xiang-qing Zhang Da-qing He Yu-ning Zhang Key Laboratory of Power Station Energy Transfer Conversion and System(Ministry of Education) School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China

The combined effect of cavitation and silt abrasion presents a great challenge and threat to secure the operation and the efficiency of hydraulic machineries working in sediment-laden *** present paper critically reviews the current research progress on the interaction mechanisms of the bubbles and the ***,the analytical models including boundary treatment methods for predicting the jet dynamics of the bubble collapse near particles are ***,the bubble collapsing dynamics,jet dynamics and shock wave characteristics near particles are revealed both experimentally and ***,the bubble-particle-wall system is investigated with a focus on microjets.

关键词： Cavitation bubble particle jet shock wave

Water and other volatiles on Mars

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National Science Review 2024年第06期 12-14页

作者： sen hu Yubing Gao Zhan Zhou Liang Gao Yangting Lin Key Laboratory of the Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

Mars, the intriguing red planet, is one of the planets most similar to the Earth in our solar system. It is widely accepted that Mars could have had a warm and wet climate in its early history supported by numerous lines of evidence, e.g. topography, canyons, outflow channels, presence of phyllosilicates and evaporative salts,sedimentary formation, and many others (e.g.[1]), and thus Mars is believed to once have a potentially habitable environment which could be able to supply fundamental conditions for the evolution of potential lives.

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Return to the Moon:New perspectives on lunar exploration

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Science Bulletin 2024年第13期69卷 2136-2148页

作者： Yangting Lin Wei Yang hui Zhang Hejiu hui sen hu Long Xiao Jianzhong Liu Zhiyong Xiao Zongyu Yue Jinhai Zhang Yang Liu Jing Yang Honglei Lin Aicheng Zhang Dijun Guo Sheng Gou Lin Xu Yuyang He Xianguo Zhang Liping Qin Zongcheng Ling Xiongyao Li Aimin Du huaiyu He Peng Zhang Jinbin Cao Xianhua Li Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China State Key Laboratory for Mineral Deposits Research and School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China State Key Laboratory of Geological Processes and Mineral Resources School of Earth SciencesChina University of GeosciencesWuhan 430074China Institute of Geochemistry Chinese Academy of SciencesGuiyang 550002China Planetary Environmental and Astrobiological Research Laboratory School of Atmospheric SciencesSun Yat-sen UniversityZhuhai 519082China National Space Science Center Chinese Academy of SciencesBeijing 100190China Deep Space Exploration Laboratory/CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of ChinaHefei 230026China Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China Technology and Engineering Center for Space Utilization Chinese Academy of SciencesBeijing 100094China School of Space and Environment Beihang UniversityBeijing 100191China

Lunar exploration is deemed crucial for uncovering the origins of the Earth-Moon system and is the first step for advancing humanity’s exploration of deep *** the past decade,the Chinese Lunar Exploration Program(CLEP),also known as the Chang’e(CE)Project,has achieved remarkable *** has successfully developed and demonstrated the engineering capability required to reach and return from the lunar ***,the CE Project has made historic firsts with the landing and on-site exploration of the far side of the Moon,along with the collection of the youngest volcanic samples from the Procellarum KREEP *** achievements have significantly enhanced our understanding of lunar *** on this success,China has proposed an ambitious crewed lunar exploration strategy,aiming to return to the Moon for scientific exploration and *** plan encompasses two primary phases:the first crewed lunar landing and exploration,followed by a thousand-kilometer scale scientific expedition to construct a geological cross-section across the lunar *** the limitations of current lunar exploration efforts and China’s engineering and technical capabilities,this paper explores the benefits of crewed lunar exploration while leveraging synergies with robotic *** study refines fundamental lunar scientific questions that could lead to significant breakthroughs,considering the respective engineering and technological *** research lays a crucial foundation for defining the objectives of future lunar exploration,emphasizing the importance of crewed missions and offering insights into potential advancements in lunar science.

关键词： Crewed lunar exploration Water and volatiles Composition and structure of lunar interior Volcanic activity and evolution of lunar mantle Space weathering and radiation environments Exploration technology

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BGAP的合成与展望

含能材料 2024年第7期32卷 761-771页

作者：闫镒腾孙善虎刘杉吉应旭白森虎黎明化工研究设计院有限责任公司河南洛阳471000 西南科技大学分析测试中心四川绵阳621000

含支化结构的聚叠氮缩水甘油醚(BGAP)含能黏合剂比线型聚叠氮缩水甘油醚(GAP)含能黏合剂具有更高的相对分子质量、更宽的官能度(f)调节范围、更高的生成热、更低的黏度等,能够提高复合固体推进剂的能量水平以及改进其工艺性能和力学性能... 详细信息

含支化结构的聚叠氮缩水甘油醚(BGAP)含能黏合剂比线型聚叠氮缩水甘油醚(GAP)含能黏合剂具有更高的相对分子质量、更宽的官能度(f)调节范围、更高的生成热、更低的黏度等,能够提高复合固体推进剂的能量水平以及改进其工艺性能和力学性能,是叠氮黏合剂的重要研究方向之一。如何可控调节官能度、相对分子质量及其分布等重要结构参数,成为获得高质量BGAP含能黏合剂的关键。本文详细阐述了BGAP的一步裂解叠氮化法合成工艺并提出了可能的合成机理,介绍了BGAP的性能研究现状,分析了存在的问题和不足,展望了BGAP的合成和性能研究发展方向,强调优化BGAP的后处理工艺、提高BGAP的制备能力以及加强BGAP的基础性能和应用研究是今后研究的重点。

关键词：支化聚叠氮缩水甘油醚(BGAP) 固体推进剂性能研究含能黏合剂合成

区块链嵌入供应链监管治理的研究——以有机农产品供应链为例

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重庆工商大学学报（社会科学版） 2024年第3期41卷 89-101页

作者：胡森森黄珊重庆工商大学重庆现代商贸物流与供应链协同创新中心重庆400067 电子科技大学经济与管理学院成都611731

针对有机农产品质量追溯系统缺乏事前事中监管以及监管治理措施缺乏动态性的问题,探索区块链技术嵌入后的监管治理策略。提出以区块链的共识机制实现欺诈惩罚,以区块链的激励机制实现声誉评分机制,以区块链的智能合约实现保证金机制,促... 详细信息

针对有机农产品质量追溯系统缺乏事前事中监管以及监管治理措施缺乏动态性的问题,探索区块链技术嵌入后的监管治理策略。提出以区块链的共识机制实现欺诈惩罚,以区块链的激励机制实现声誉评分机制,以区块链的智能合约实现保证金机制,促进有机农产品供应链主体的合作,实现有机追溯和监管的一体化。构建有机农产品供应链系统内有机农产品生产者与加工企业间的演化博弈模型,分析多元监管机制下各主体的决策和双方决策间的互动规律,以及最优策略抉择行为。以五常大米为研究案例,对相关结论和变化进行验证分析。研究结果显示,区块链嵌入能有效改善有机产品生产企业与加工企业之间的信任关系,促进诚信交易,提升有机农产品供应链事前和事后治理水平,并促进区块链技术的落地应用。

关键词：有机农产品供应链区块链监管机制演化博弈

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首次在嫦娥五号月壤中鉴定出铁陨石碎片类型

Science Bulletin 2024年第4期69卷 554-561页

作者：刘小莹谷立新田恒次李静唐旭胡森林杨挺 Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Lunar soil preserves numerous fragments of meteorites impacting on the Moon,providing a unique opportunity to investigate the distribution of the types of projectiles over billions of *** we report the first discovery of an iron meteorite fragment from the Chang’e-5 lunar soil,which consists mainly of martensite(quenched from taenite),kamacite,and schreibersite,with a trace of *** meteorite fragment is Ni-and P-rich,S-poor,and based on its mineral chemistry and bulk composition,can be classified into the IID-group,a rare and carbonaceous group of iron meteorite originating in the outer Solar *** meteorite fragment experienced only limited partial melting followed by fast cooling,suggestive of efficient preservation of intact remnants of iron meteorites impacting on the porous lunar ***,it is a relic of a low-velocity impact of submillimeter-sized metal grains originated from an IID-like iron *** observations demonstrate that it is feasible to achieve the type distribution of meteorites impacting on the Moon via systematically analyzing a large number of metal grains separated from lunar soils,thus shedding light on the dynamic evolution of the Solar System.

关键词： Chang’e-5 lunar soils Metal clast Iron meteorite Schreibersite Impact event

基于设计心理学对公共卫生间感应蹲便器体验感研究

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鞋类工艺与设计 2024年第5期4卷 106-108页

作者：胡森郭靖雅大连工业大学辽宁大连116034

卫生间是人们生活中不可缺少的公共空间,随着时代的发展,不仅对卫生间的环境和设计的要求有所提高,同时,对其使用的体验感的要求也越来越高。设计的目的是人而不是产品,要做到以人为本的设计不仅要考虑人的心理和生理的感受,同时也要重... 详细信息

卫生间是人们生活中不可缺少的公共空间,随着时代的发展,不仅对卫生间的环境和设计的要求有所提高,同时,对其使用的体验感的要求也越来越高。设计的目的是人而不是产品,要做到以人为本的设计不仅要考虑人的心理和生理的感受,同时也要重视产品的体验感。产品的体验感是产品给人的一种反馈,好的体验感会给人带来愉悦的心情。为此,本文将通过笔者对相关知识的认识与实践,通过体验感对情感体系的研究,以用户心理的公共卫生间感应蹲便器的体验感,对感应蹲便进行了视觉与功能的改良并加以研究。

关键词：心理体验感情绪感应蹲便器

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新型柱塞式安全阀设计优化及仿真分析

机床与液压 2024年第1期52卷 127-131页

作者：王禹涧胡森苏雷王天舒沈阳航天新光集团有限公司辽宁沈阳110000 北京航空航天大学宇航学院北京102206

针对导弹气路系统用安全阀小型化、大流量、高可靠性的发展要求,设计一种新型柱塞式安全阀。绘制安全阀的流场的几何模型,基于Fluent仿真分析平台建立新型柱塞式安全阀流道的数学模型。对其进行详细的流场分析,明确了安全阀气穴气蚀的... 详细信息

针对导弹气路系统用安全阀小型化、大流量、高可靠性的发展要求,设计一种新型柱塞式安全阀。绘制安全阀的流场的几何模型,基于Fluent仿真分析平台建立新型柱塞式安全阀流道的数学模型。对其进行详细的流场分析,明确了安全阀气穴气蚀的产生机制和影响因素,并提出流道优化方法。利用AMESim软件分析了优化后柱塞式安全阀动态特性。最后,利用测试系统进行了安全阀的启闭特性试验,试验结果满足设计要求,验证了理论分析和设计方法的正确性。

关键词：新型柱塞式安全阀流场分析流道优化动态特性

一种基于任务空间的T-VTOL多模态轨迹生成算法

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战术导弹技术 2024年第1期 85-94,104页

作者：张邦楚胡森伍勋朱威禹中山大学航空航天学院深圳518107

针对尾座式垂直起降无人机(T-VTOL)多模态轨迹规划复杂的问题,提出了一种面向任务空间的多模态轨迹生成算法。证明了T-VTOL全模态的微分平坦特性,位置的高阶导数是系统平坦的输出,表明T-VTOL可以在任务空间内设置符合期望轨迹的任意定... 详细信息

针对尾座式垂直起降无人机(T-VTOL)多模态轨迹规划复杂的问题,提出了一种面向任务空间的多模态轨迹生成算法。证明了T-VTOL全模态的微分平坦特性,位置的高阶导数是系统平坦的输出,表明T-VTOL可以在任务空间内设置符合期望轨迹的任意定点。基于庞特里亚金极小值原理提出了T-VTOL在三维空间的多模态轨迹生成算法与封闭解,并给出其可行性验证方法。结果表明,在两种过渡模态以及盘旋模态,T-VTOL飞行轨迹严格遵循任务空间约束。此外,所提算法具有计算时间短,算力要求低,易于部署的优点。

关键词：无人机轨迹优化尾座式垂直起降无人机庞特里亚金极小值原理微分平坦特性无人机多模态切换 T-VTOL任务空间最优过渡过程