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Towards total protection from impact:a viability study using EPE foam to protect falling eggs

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Transportation Safety and Environment 2019年第2期1卷 154-163页

作者： gui-rong liu Guang Chen Shu-Yong Duan Department of Aerospace Engineering and Engineering Mechanics University of Cincinnati2600 Clifton AveCincinnatiOhio45221 USA State Key Laboratory of Reliability and Intelligence of Electrical Equipment HeBei University of TechnologyTianjin City300401 China School of Mechanical Engineering HeBei University of TechnologyTianjin City300401 China

Total protection of fragile goods and equipment during transport has become critically important as fast delivery systems are growing rapidly due to the rise of mass online commerce *** paper therefore studies the protection of falling eggs—one of the most fragile goods—through *** experiments are first conducted to obtain the critical stress at which the eggshell is damaged by falling *** are first conducted of unpackaged eggs dropping onto a granite platform from various *** element method(FEM)models of unpackaged eggs are then built to simulate the behaviour of eggs and compute their stress *** experimental data is compared with the results of FEM simulations to determine the critical stress at which the eggshell is damaged.A series of tests and numerical simulations are then carried out for eggs wrapped in expanded polyethylene(EPE)*** stress distribution of both a single egg and multiple eggs in packaging are *** empirical formula between the drop speed(or height)and the bottom thickness of the EPE foam packaging is obtained,which can be useful in the design of packaging for the total protection of eggs that may fall during usual transport and delivery *** experimental and numerical results from this study show that it is viable to protect fragile goods,as long as the EPE form packaging has sufficient *** proposed study and design procedure are helpful for the selection of key parameters of foam packaging to protect fragile industry products from impact.

关键词： impact protection critical stress EPE foam packaging egg drop test FEM simulation

An Efficient Protocol for the Reduction of Azidonucleosides Catalyzed by Raney Nickel

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有机化学 2003年第Z1期23卷 104-105页

作者： QU gui-rong liu Qi-Bin Key Laboratory of Environmental Science and Technology of High Education of Henan Province College of Chemical and Environmental Science Henan Normal University Xinxiang 453002 Key Laboratory of Environmental Science and Technology of High Education of Henan Province College of Chemical and Environmental Science Henan Normal University Xinxiang 453002

　　Aminonucleosides are very important intermediates in the synthesis of anti-sense and anti-gene drugs, nucleic acid analogues, diagnostic and analytical agents, antitumor and antiviral compounds. In the presence of Raney nickel, the reduction of various azidonucleosides to the corresponding aminonucleosides is in good yields (Table 1,Scheme 1).……

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Radiation resistance property of barium gallo-germanate glass doped by Nb_(2)O_(5)

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Chinese Physics B 2022年第2期31卷 593-597页

作者： gui-rong liu Xiao-Dong Chen Hong-Gang liu Yan Wang Min Sun Na Yan Qi Qian Zhong-Min Yang State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials South China University of TechnologyGuangzhou 510640China Guangdong Planning and Designing Institute of Telecommunications Co.LTD Guangzhou 510630China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of TechnologyGuangzhou 510640China Qingyuan Csg New Energy-Saving Materials Co. LTDQingyuan 511650China

Effects of Nb_(2)O_(5)dopant on the radiation response of barium gallo-germanate(BGG)glass are studied mainly by electron paramagnetic resonance and absorption *** to the Nb^(5+)$Nb^(3+)interconversion in doped samples,formations of Ge-related non-bridging oxygen hole center and Ge-related electron center defects after g-ray irradiation are ***,Nb_(2)O_(5)dopant can enhance radiation resistance of BGG glass,and 1.0%Nb2O5 concentration is the best.

关键词： germanate glass radiation resistance Nb2O5 dopant

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无网格光滑点插值法

无网格光滑点插值法

An Efficient Protocol for the Reduction of Azidonucleosides Catalyzed by Raney Nickel

中国计算力学大会2014暨第三届钱令希计算力学奖颁奖大会

作者：张桂勇宗智 Yuantong Gu gui‐rong liu 大连理工大学工业装备结构分析国家重点实验室船舶工程学院 School of Chemistry Physicsand Mechanical EngineeringQueensland University of Technology School of Aerospace Systems University of Cincinnati

传统有限元法由于刚度过硬会导致自锁和应力结果精度低,大变形网格畸变会导致计算失效,可实现自动剖分产生的低阶常应变单元计算精度低。针对以上问题,作者创造性地提出了广义梯度光滑和应变场构造的理论和方法,建立了新的解空间理论和... 详细信息

传统有限元法由于刚度过硬会导致自锁和应力结果精度低,大变形网格畸变会导致计算失效,可实现自动剖分产生的低阶常应变单元计算精度低。针对以上问题,作者创造性地提出了广义梯度光滑和应变场构造的理论和方法,建立了新的解空间理论和梯度光滑准则;通过引入点差值法进行变量插值,进一步提出了新颖高效的无网格光滑点插值法。光滑点插值法基于可自动生成的常应变非结构化网格,在双重弱形式下应用梯度光滑技术,通过软化模型刚度,显著提高计算精度、收敛率和效率,能提供应变能上限解,对体积锁死免疫,并大大降低结果对网格质量的依赖。光滑点插值法被广泛应用于解决科学工程领域多个难点问题并取得了满意的结果。

关键词：数值方法无网格法广义梯度光滑点插值法

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An Efficient Protocol for the Reduction of Azidonucleosides ...

Inhibiting ceramide synthase 5 expression in microglia decreases neuroinflammation after spinal cord injury

第三届全国有机化学学术会议

作者： QU, gui-rong liu, Qi-Bin (Key Laboratory of Environmental Science and Technology of High Education of Henan Province, College of Chemical and Environmental Science , Henan Normal University, Xinxiang 453002)

＜正＞ Aminonucleosides are very important intermediates in the synthesis of anti-sense and anti-gene drugs, nucleic acid analogues, diagnostic and analytical agents, antitumor and antiviral compounds. In the presence of Raney nickel, the reduction of various azidonucleosides to the corresponding aminonucleosides is in good yields （Table 1, Scheme 1）.

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Neural Regeneration Research 2025年第10期20卷 2955-2968页

作者： Wei Zhang Yubao Lu Ruoqi Shen Yingjie Wu Chenrui liu Xingxing Fang Liangming Zhang Bin liu Limin rong Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina National Medical Products Administration(NMPA)Key Laboratory for Quality Research and Evaluation of Cell Products GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina

Microglia,the resident monocyte of the central nervous system,play a crucial role in the response to spinal cord ***,the precise mechanism remains *** investigate the molecular mechanisms by which microglia regulate the neuroinflammatory response to spinal cord injury,we performed single-cell RNA sequencing dataset analysis,focusing on changes in microglial *** found that the MG1 subpopulation emerged in the acute/subacute phase of spinal cord injury and expressed genes related to cell pyroptosis,sphingomyelin metabolism,and neuroinflammation at high ***,we established a mouse model of contusive injury and performed intrathecal injection of siRNA and molecular inhibitors to validate the role of ceramide synthase 5 in the neuroinflammatory responses and pyroptosis after spinal cord ***,we established a PC12-BV2 cell co-culture system and found that ceramide synthase 5 and pyroptosis-associated proteins were highly expressed to induce the apoptosis of neuron *** ceramide synthase 5 expression in a mouse model of spinal cord injury effectively reduced ***,ceramide synthase 5-induced pyroptosis was dependent on activation of the NLRP3 signaling *** ceramide synthase 5 expression in microglia in vivo reduced neuronal apoptosis and promoted recovery of neurological ***2g7 formed a“bridge”between sphingolipid metabolism and ceramide synthase 5-mediated cell death by inhibiting the NLRP3 signaling ***,these findings suggest that inhibiting ceramide synthase 5 expression in microglia after spinal cord injury effectively suppressed microglial pyroptosis mediated by NLRP3,thereby exerting neuroprotective effects.

关键词： ceramide synthase 5 gasdermin D microglia neuroinflammation NLRP3 nuclear factor kappa B Pla2g7 pyroptosis sphingomyelin metabolism spinal cord injury

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新世纪图书馆知识管理探略

图书馆论坛 2001年第6期21卷 34-36页

作者：杨桂荣刘为民张仁春南方冶金学院图书馆江西赣州341000

从知识经济对图书馆的机遇与挑战、知识管理对图书馆传统管理的扬弃和知识管理的主要表征等三方面论述了作者的观点。

关键词：图书馆管理知识管理知识经济 21世纪

四川地区地震崩塌滑坡的基本特征及危险性分区

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山地学报 2002年第4期20卷 456-460页

作者：杨涛邓荣贵刘小丽西南交通大学土木工程学院岩土工程系西南交通大学土木工程学院岩土工程系四川成都610031

四川地区地震崩塌及滑坡非常发育 ,时常造成严重灾害 ,本文在现场调查资料及已有研究的基础上 ,对四川地区地震崩塌、滑坡的分布规律、类型、特征及其灾害性进行了更深入的分析 ,并就其特征进行了分区

关键词：地震崩塌地震滑坡地震灾害危险性分区

应用Servqual量表分析影响社区卫生服务质量的因素

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护理实践与研究 2017年第5期14卷 142-144页

作者：黄桂园杨贵荣刘新萍石河子大学医学院第一附属医院社区门诊石河子市832008

目的:调查并探讨影响社区卫生服务质量的相关因素。方法:2015年4~9月随机抽取社区65岁以上健康体检居民383名,将Servqual量表应用于社区卫生服务对老年人健康体检服务质量评价中,分析影响社区卫生服务质量的相关因素。结果:得出影响社... 详细信息

目的:调查并探讨影响社区卫生服务质量的相关因素。方法:2015年4~9月随机抽取社区65岁以上健康体检居民383名,将Servqual量表应用于社区卫生服务对老年人健康体检服务质量评价中,分析影响社区卫生服务质量的相关因素。结果:得出影响社区卫生服务质量的因素主要是自我健康评价、性别、参加体检次数。结论:2次参加体检的人群、男性体检者及自我健康评价低的老年健康体检者对社区卫生服务的期望高,感知服务低。

关键词：社区卫生服务质量老年健康体检人群 Servqual量表影响因素