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船用蛇形机器人的蜿蜒运动偏移机理及矫正

大连海事大学学报 2024年第2期50卷 67-74,80页

作者：杨东冉张彬郑庆功李晓峰王博乔夏远辰大连海事大学轮机工程学院辽宁大连116026

针对船用消防蛇形机器人蜿蜒运动中产生的偏移使机器人无法在船舶复杂管系间隙间有效运动的问题,基于超冗余蛇形机器人的运动学模型,从运动学和力学角度分析非线性偏移的原因由关节间旋转过程中产生的扭转力矩引起。通过实验获得摆动幅... 详细信息

针对船用消防蛇形机器人蜿蜒运动中产生的偏移使机器人无法在船舶复杂管系间隙间有效运动的问题,基于超冗余蛇形机器人的运动学模型,从运动学和力学角度分析非线性偏移的原因由关节间旋转过程中产生的扭转力矩引起。通过实验获得摆动幅度、相邻连杆之间运动相位差对机器人法向偏移的作用规律,证明了该两个参数只能对机器人的法向偏移程度产生影响,并不能有效消除偏移。基于Serpenoid控制曲线建立一个简单、高效的自适应偏移矫正控制算法,并开展Webots机器人仿真和样机试验。结果表明,消防蛇形机器人的平均最大径向偏移量减小42.8 cm,降低了75.2%,在未改变机器人运动形状前提下,可满足船舶狭窄环境的工作需求。

关键词：蛇形机器人蜿蜒运动偏移机理偏移矫正 Serpenoid控制曲线

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易流态固体散货海运液化风险预测

大连海事大学学报 2024年第1期50卷 66-75页

作者：吴宛青白兆傲赵子豪郑庆功封星杜嘉立张春龙吉海龙大连海事大学轮机工程学院辽宁大连116026 大连海事大学航海学院辽宁大连116026 中华人民共和国辽宁海事局大连危险货物运输研究中心辽宁大连116001

为有效控制海运环境下易流态固体散货因液化而导致的船舶倾覆事故风险,基于船舶运动学及波能理论,采用AWQA水动力计算软件,模拟分析全球固体散货海运主力船型在各典型海域航行过程中所遭遇的外界环境载荷,并根据土动力学理论及三轴试验... 详细信息

为有效控制海运环境下易流态固体散货因液化而导致的船舶倾覆事故风险,基于船舶运动学及波能理论,采用AWQA水动力计算软件,模拟分析全球固体散货海运主力船型在各典型海域航行过程中所遭遇的外界环境载荷,并根据土动力学理论及三轴试验结果对相关外界环境载荷进行货物液化风险的等效分析,在此基础上,构建货物液化风险评估模型。基于风险评估模型及其数值计算样本,采用BP神经网络算法完成货物液化风险快速预测,实现了货物海运液化风险的快速智能预测,并通过模型的权值矩阵及阈值矩阵得到BP快速预测模型的显性表述。运用该预测模型,对4种典型易流态固体散货海运环境下的液化风险进行快速预测,预测结果与评估模型结果具有很好的一致性。该预测模型可基于船型和海况等参数快速、有效预测易流态固体散货海运液化风险,为一线海事监管提供了安全方法,同时对IMSBC规则的发展也起到良好的促进作用。

关键词：易流态固体散货海上运输液化风险智能算法快速预测

A promoting nitric oxide-releasing coating containing copper ion on ZE21B alloy for potential vascular stent application

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Journal of Magnesium and Alloys 2023年第12期11卷 4542-4561页

作者： Qianying Jia qinggong Jia Shijie Zhu Yufeng zheng Yoji Mine Kazuki Takashima Shaokang Guan School of Materials Science and Engineering&Henan Key Laboratory of Advance Magnesium Alloy&Key Laboratory of Materials Processing and Mold Technology(Ministry of Education) Zhengzhou UniversityZhengzhou 450001China Department of Materials Science and Engineering Kumamoto University2-39-1 KurokamiChuo-kuKumamoto 860-8555Japan International Research Organization for Advanced Science and Technology(IROAST) Kumamoto University2-39-2 Kumamoto 860-8555Japan School of Materials Science and Engineering Peking UniversityBeijing 100871China

Magnesium-based biodegradable metals as cardiovascular stents have shown a lot of excellent performance, which have been used to treat coronary artery diseases. However, the excessive degradation rate, imperfect biocompatibility and delayed re-endothelialization still lead to a considerable challenge for its application. In this work, to overcome these shortcomings, a compound of catalyzing nitric oxide(NO) generation containing copper ions(Cu^(2+)) and hyaluronic acid(HA), an important component of the extracellular matrix, were covalently immobilized on a hydrofluoric acid(HF)-pretreated ZE21B alloy via amination layer for improving its corrosion resistance and endothelialization. Specifically,the Cu^(2+) chelated firmly with a cyclen 1,4,7,10-tetraazacyclododecane-N’, N’’, N’’’, N-tetraacetic acid(DOTA) could form a stability of hybrid coating, avoiding the explosion of Cu^(2+). The chelated Cu^(2+) enabled the catalytic generation of NO and promoted the adhesion and proliferation of endothelial cells(ECs) in vascular micro-environment. In this case, the synergistic effect of NO-generation and endothelial glycocalyx molecules of HA lead to efficient ECs promotion and smooth muscle cells(SMCs) inhibition. Meanwhile, the blood compatibility also had achieved a marked improvement. Moreover, the standard electrochemical measurements indicated that the functionalized ZE21B alloy had better anti-corrosion ability. In a conclusion, the dual-functional coating displays a great potential in the field of biodegradable magnesium-based implantable cardiovascular stents.

关键词： ZE21B alloy Functional coating Hyaluronic acid Nitric oxide Cardiovascular stent

Recent Progress of Microgravity Science Research in China

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空间科学学报 2022年第4期42卷 772-785页

作者： ZHAO Jianfu DU Wangfang KANG Qi LAN Ding LI Kai LI Weibin LIU Y C LUO Xinghong MIAO Jianyin WANG qinggong WANG Shuangfeng ZHANG Tao ZHANG Xingwang ZHANG Yonghai zheng Huiqiong CAS Key Laboratory of Microgravity Institute of MechanicsChinese Academy of SciencesBeijing 100190 School of Engineering Science University of Chinese Academy of SciencesBeijing 100049 Center for Combustion Energy Tsinghua UniversityBeijing 100084 Institute of Metal Research Chinese Academy of SciencesShenyang 110016 Institute of Spacecraft System Engineering China Academy of Space TechnologyBeijing 100094 Qian Xuesen Laboratory of Space Technology China Academy of Space TechnologyBeijing 100094 Shanghai Institute of Technical Physics Chinese Academy of SciencesShanghai 200083 Institute of Semiconductors Chinese Academy of SciencesBeijing 100083 School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049 Center for Excellence in Molecular Plant Sciences Chinese Academy of SciencesShanghai 200032

Microgravity science is an important branch of space science.Its major objective is to study the laws of materials movement in microgravity,as well as to reveal the influence of gravity on the movement of materials in different gravity environments.Application researches relevant to these basic studies are also important contents of microgravity science.The advanced subjects,to some extent,reflect the ability of human beings to understand nature and the R&D level in this field in various countries.In this paper,the recent progress and the latest achievements of microgravity science and application researches in China aboard space platforms such as the Core Capsule Tianhe of the China Space Station(CSS)and satellites,as well as utilizing ground-based short-term microgravity facilities such as the Drop Tower Beijing and TUFF,are summarized,which cover the following sub-disciplines:microgravity fluid physics,microgravity combustion science,space materials science,space fundamental physics,space bio-technology,and relevant space technology applications.

关键词： Microgravity science China Space Station(CSS) Ground-based short-term microgravity platforms Microgravity fluid physics Microgravity combustion science Space materials science Space fundamental physics Space bio-technology

Design of single-phased magnesium alloys with typically high solubility rare earth elements for biomedical applications:Concept and proof

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Bioactive Materials 2023年第4期22卷 180-200页

作者： Dong Bian Xiao Chu Jin Xiao Zhipei Tong He Huang qinggong Jia Jianing Liu Wenting Li Hui Yu Yue He Limin Ma Xiaolan Wang Mei Li Tao Yang Wenhan Huang Chi Zhang Mengyu Yao Yu Zhang Zhigang Xu Shaokang Guan Yufeng zheng Medical Research Center Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou510080China Department of Orthopedics Guangdong Provincial People’s HospitalGuangdong Academy of Medical SciencesGuangzhou510080China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing100871China School of Materials Science and Engineering Peking UniversityBeijing100871China ERC for Revolutionizing Metallic Biomaterials North Carolina A&T State UniversityGreensboroNC27411USA

Rare earth elements(REEs)have been long applied in magnesium alloys,among which the mischmetal-containing WE43 alloy has already got the CE mark approval for clinical application.A considerable amount of REEs(7 wt%)is needed in that multi-phased alloy to achieve a good combination of mechanical strength and corrosion resistance.However,the high complex RE addition accompanied with multiple second phases may bring the concern of biological hazards.Single-phased Mg-RE alloys with simpler compositions were proposed to improve the overall performance,i.e.,“Simpler alloy,better performance”.The single-phased microstructure can be successfully obtained with typical high-solubility REEs(Ho,Er or Lu)through traditional smelting,casting and extrusion in a wide compositional range.A good corrosion resistance with a macroscopically uniform corrosion mode was guaranteed by the homogeneously single-phased microstructure.The bimodal-grained structure with plenty of sub-grain microstructures allow us to minimize the RE addition to<1 wt%,without losing mechanical properties.The single-phased Mg-RE alloys show comparable mechanical properties to the clinically-proven Mg-based implants.They exhibited similar in-vitro and in-vivo performances(without local or systematic toxicity in SD-rats)compared to a high purity magnesium.In addition,metal elements in our single-phased alloys can be gradually excreted through the urinary system and digestive system,showing no consistent accumulation of RE in main organs,i.e.,less burden on organs.The novel concept in this study focuses on the simplification of Mg-RE based alloys for biomedical purpose,and other biodegradable metals with single-phased microstructures are expected to be explored.

关键词： Biodegradable magnesium Rare earth Bimodal grain structure Mechanical property Corrosion resistance

内河LNG动力船机舱NG泄漏爆炸对人员的损伤后果

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中国航海 2019年第4期42卷 51-58页

作者：郑庆功吴宛青宋明大连海事大学轮机工程学院辽宁大连116026 交通运输部海事局科技信息处北京100736

为评估液化天然气(Liquefied Natural Gas,LNG)动力船机舱内气体燃料泄漏和气云爆炸后果和对机舱内人员的损伤程度,对三维计算流体力学(Computational Fluid Dynamics,CFD)工具Fluidyn的可靠性进行验证,建立典型内河LNG动力船机舱模型,... 详细信息

为评估液化天然气(Liquefied Natural Gas,LNG)动力船机舱内气体燃料泄漏和气云爆炸后果和对机舱内人员的损伤程度,对三维计算流体力学(Computational Fluid Dynamics,CFD)工具Fluidyn的可靠性进行验证,建立典型内河LNG动力船机舱模型,通过数值模拟研究不同情境下机舱内气体燃料泄漏事故和爆炸事故后果,结合相关损伤准则研究事故后果对机舱内人员的损伤程度。研究结果表明:小流量持续泄漏情境下,机舱内局部小空间内形成可燃爆气云,燃料最大积聚量小于1 kg,气云爆炸后果对机舱内人员无损害风险;大流量泄漏情境下机舱内可燃气云体积迅速增加,泄漏持续30 s和60 s时,燃料积聚量可分别超过3 kg和5 kg,气云爆炸可导致机舱内人员损伤程度为重伤或死亡。

关键词： LNG动力船机舱气云爆炸数值模拟人员损伤

公共数字文化资源整合的标准体系:内容框架及构建路径

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图书馆论坛 2021年第8期41卷 20-25页

作者：石庆功郑燃唐义武汉大学信息管理学院福建师范大学社会历史学院

标准化是公共数字文化资源整合的重要保障。文章以现有公共数字文化资源整合相关标准为基础,构建包括资源建设标准、技术标准、服务标准、管理规范和绩效指标等模块的公共数字文化资源整合标准体系框架。为保障该体系的制定和实施,应成... 详细信息

标准化是公共数字文化资源整合的重要保障。文章以现有公共数字文化资源整合相关标准为基础,构建包括资源建设标准、技术标准、服务标准、管理规范和绩效指标等模块的公共数字文化资源整合标准体系框架。为保障该体系的制定和实施,应成立公共数字文化资源整合标准统一协调机构,广泛借鉴国内外标准体系建设成果,面向公共数字文化资源整合需求进行重点领域标准突破,实施公共数字文化资源整合标准体系优化维护机制。

关键词：公共数字文化资源整合标准体系

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RNAi技术在抗甲型流感病毒中的研究进展

生物技术通报 2014年第12期30卷 55-60页

作者：韩庆功郑玉姝河南科技学院动物科学学院新乡453003

RNAi技术广泛应用于防治人类多种疾病病原的药物和疫苗开发中,并取得了巨大的成果。流感病毒极易发生抗原漂移和抗原转变,这给抗流感病毒药物和疫苗的研制提出很大的挑战。RNAi技术的出现给流感的防治提供了新的思路。对近年来国内外利... 详细信息

RNAi技术广泛应用于防治人类多种疾病病原的药物和疫苗开发中,并取得了巨大的成果。流感病毒极易发生抗原漂移和抗原转变,这给抗流感病毒药物和疫苗的研制提出很大的挑战。RNAi技术的出现给流感的防治提供了新的思路。对近年来国内外利用RNAi技术开发抗流感病毒药物和新型流感疫苗研究现状及前景进行综述,以期为流感的综合防治研究提供参考。

关键词：流感病毒 RNA干扰 siRNA miRNA 复制疫苗

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多喷嘴带相差射流冲击传热的数值模拟

化工学报 2014年第S1期65卷 240-244页

作者：耿丽萍许庆功郑传波周静伟中国计量学院热能工程系浙江杭州310018 洛阳理工学院计算机与信息工程系河南洛阳471023

采用数值模拟的方法对带相差的多喷嘴射流冲击传热进行数值模拟,分别得到不同相差和不同射流频率条件下的冲击传热效果。结果显示,在不同的射流喷射模式下,按相差顺序增加方式(B型)喷出的射流传热效果最好,两喷嘴间的相差为0°~180°之... 详细信息

采用数值模拟的方法对带相差的多喷嘴射流冲击传热进行数值模拟,分别得到不同相差和不同射流频率条件下的冲击传热效果。结果显示,在不同的射流喷射模式下,按相差顺序增加方式(B型)喷出的射流传热效果最好,两喷嘴间的相差为0°~180°之间时,传热板的传热效果随着相差角度的增加,传热效果得到增强,且在相差为120°时,整个传热板传热效果最均匀;在频率为0~10Hz时,频率越大,整个传热板传热越均匀,但频率的影响小于相差及喷射模式的影响。

关键词：相差射流冲击数值模拟对流传热