检索结果-南通市图书馆

Biomechanical behavior of brain injury caused by sticks using finite element model and Hybrid-III testing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Traumatology 2015年第2期18卷 65-73页

作者： Kui Li Jiawen wang Shengxiong Liu sen Su Chenjian Feng Xiaoxiang Fan Zhiyong Yin Research Institute of Surgery/Daping Hospital Third Military Medical University Chongqing 400042 China Department of Basic Medical Institute of Pathology Fashan University Fashan 528000 China School of Pharmacy and Bioengineering Chongqing University of Technology. Chongqing 400050 China

Objective： To study the biomechanical mechanism of head injuries beaten with sticks, which is common in the battery or assaultive cases.Methods： In this study, the Hybrid-III anthropomorphic test device and finite element model （FEM） of the total human model for safety （THUMS） head were used to determine the biomechanical response of head while being beaten with different sticks. Total eight Hybrid-III tests and four finite element simulations were conducted. The contact force, resultant acceleration of head center of gravity, intracranial pressure and von Mises stress were calculated to determine the different biomechanical behavior of head with beaten by different ***： In Hybrid-III tests, the stick in each group demonstrated the similar kinematic behavior under the same loading condition. The peak values of the resultant acceleration for thick iron stick group, thin iron stick group, thick wooden stick group and thin wooden stick group were 203.4 g, 221.1 g, 170.5 g and 122.2 g respectively. In finite element simulations, positive intracranial pressure was initially observed in the frontal comparing with negative intracranial pressure in the contra-coup site. Subsequently the intracranial pressure in the coup site was decreasing toward negative value while the contra-coup intracranial pressure increasing toward positive ***： The results illustrated that the stiffer and larger the stick was, the higher the von Mises stress, contact force and intracranial pressure were. We believed that the results in the Hybrid-III tests and THUMS head simulations for brain injury beaten with sticks could be reliable and useful for better understanding the injury mechanism.

关键词： Biomechanics Head injury Sticks Hybrid-Ⅲ THUMS FEM

Facile synthesis of hollow Ti2Nb10O29 microspheres for high-rate anode of Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2018年第6期61卷 670-676页

作者： Yong-Gang Sun Tian-Qi Sun Xi-Jie Lin Xian-sen Tao Dong Zhang Chen Zeng An-Min Cao Li-Jun Wan Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Fine Chemicals Dalian University of Technology Dalian 116024 China College of Food Science & Technology Huazhong Agricultural University Wuhan 430070 China

Titanium niobium oxides emerge as promising anode materials with potential for applications in lithium ion batteries with high safety and high energy ***,the innate low electronic conductivity of such a composite oxide seriously limits its practical capacity,which becomes a serious concern especially when a high rate charge/discharge capability is ***,using a modified template-assisted synthesis protocol,which features an in-situ entrapment of both titanium and niobium species during the formation of polymeric microsphere followed by a pyrolysis process,we succeed in preparing hollow microspheres of titanium niobium oxide with high efficiency in structural *** used as an anode material,the structurally-controlled hollow sample delivers high reversible capacity(103.7 m A h g^(-1)at 50 C)and extraordinary cycling capability especially at high charge/discharge currents(164.7 m A h g^(-1)after 500 cycles at 10 C).

关键词： hollow microspheres Ti2Nb10O29 anode materials high rate capability Li-ion batteries

在线全文

学校读者我要写书评

暂无评论

Ni／AC膜电极-铝合金储氢电池的研究

无机材料学报 2006年第5期21卷 1103-1108页

作者：张林森王为李振亚天津大学化工学院应用化学系天津300072

采用化学还原法制备了以椰壳活性炭(AC)为载体的Ni／AC电催化剂．将Ni／AC电催化剂制作成膜电极,与铝合金一起组成了一种全新概念的高效、安全、廉价的Ni／AC膜电极-铝合金储氢电池．运用SEM和XRD对Ni／AC电催化剂的形貌和结构进行了分... 详细信息

采用化学还原法制备了以椰壳活性炭(AC)为载体的Ni／AC电催化剂．将Ni／AC电催化剂制作成膜电极,与铝合金一起组成了一种全新概念的高效、安全、廉价的Ni／AC膜电极-铝合金储氢电池．运用SEM和XRD对Ni／AC电催化剂的形貌和结构进行了分析,通过稳态极化曲线研究了Ni／AC膜电极在中性电解液中的电催化活性,将Ni／AC膜电极与铝合金组装成的模拟电池进行了恒流放电实验以研究其产氢量和放电性能．结果表明,镍在活性炭上的负载量为50％时,活性炭上沉积的镍颗粒最小;采用镍负载量为50％的Ni／AC电催化剂的Ni／AC膜电极的电催化活性最高,将其作为正极的储氢电池不仅放电性能好,产氢量也大．

关键词： Ni/AC电催化剂储氢电池中性电解液产氢量

Four new diphenyl ether derivatives from a mangrove endophytic fungus Epicoccum sorghinum

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2022年第7期20卷 537-540页

作者： ZHU Jun-Jie HUANG Qi-sen LIU Sheng-Quan DING Wei-Jia XIONG Ya-Hong LI Chun-Yuan Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Ag-ricultural UniversityGuangzhou 510642China

Four new diphenyl ethers,named epicoccethers K−N(1−4),were purified from the fermentation medium of a fungus Epicoccum sorghinum derived from Myoporum bontioides,and identified through HR-ESI-MS and NMR spectral *** that compound 1 showed moderate antifungal activity against Penicillium italicum and Fusarium graminearum,the other three compounds showed stronger activity against them than *** of them showed moderate or weak antibacterial activity towards Staphylococcus aureus and Escherichia coli with O6 and O78 serotypes except that 3 was inactive to *** O6.

关键词： Epicoccum sorghinum Antimicrobial activity Diphenyl ether Secondary metabolite

Outcomes and mechanisms of ischemic preconditioning in liver transplantation

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2010年第4期9卷 346-354页

作者： Yan, Sheng Jin, Li-Ming Liu, Yuan-Xing Zhou, Lin Xie, Hai-Yang Zheng, Shu-sen Zhejiang Univ Sch Med Affiliated Hosp 1 Minist Publ HlthKey Lab Combined Multiorgan Tran Hangzhou 310003 Zhejiang Peoples R China

BACKGROUND: Liver transplantation is so far the most effective therapeutic modality for end-stage liver diseases, but ischemia/reperfusion (I/R) injury represents a critical barrier to liver transplantation. Primary graft dysfunction and small-for-size syndrome are closely associated with I/R injury. Ischemic preconditioning (IPC) is defined as a brief period of liver ischemia followed by reperfusion, and has demonstrated protections against a prolonged I/R injury and improved the capacity of regeneration. The article aimed to review IPC literatures for the understanding of the effects of IPC on I/R injury involving in the procurement of donor liver and protective mechanisms. DATA SOURCES: A literature search of MEDLINE and Web of Science databases using 'liver transplantation', 'liver regeneration', 'hepatectomy', 'ischemia/reperfusion' and 'ischemic preconditioning' was performed, and then a large amount of related data was collected. RESULTS: The literature search provided a huge amount of evidence for the protective effects of IPC on I/R injury in liver transplantation, including reduction of blood loss in hepatectomy, intraoperative hemodynamic stability and its significant role in liver regeneration. The mechanism involves in balancing inflammatory cytokines, enhancing energy status and mitigating microcirculatory disturbance. CONCLUSION: IPC plays an essential role in hepatectomy before and after harvest of living donor liver and implantation of liver graft.

关键词： liver regeneration ischemia/reperfusion injury ischemic preconditioning hepatectomy liver transplantation

在线全文

学校读者我要写书评

暂无评论

延时反馈半导体激光器双劈控制混沌方法研究

物理学报 2008年第5期57卷 2827-2831页

作者：颜森林南京晓庄学院物理系南京210017

提出延时反馈半导体激光器双劈控制混沌方法,建立有劈控制的激光动力学物理模型.通过调节激光器外腔光路中的光器件劈去控制反馈光光程,改变了反馈光的延时时间和反馈强度,在物理上实现了延时时间和反馈强度的双参数混沌控制.数值结果... 详细信息

提出延时反馈半导体激光器双劈控制混沌方法,建立有劈控制的激光动力学物理模型.通过调节激光器外腔光路中的光器件劈去控制反馈光光程,改变了反馈光的延时时间和反馈强度,在物理上实现了延时时间和反馈强度的双参数混沌控制.数值结果证明该方法可以控制激光混沌到周期态,能使激光器输出光脉冲平均功率增加.

关键词：混沌控制劈双参数

Oxidant/antioxidant balance in the aqueous humor of patients with glaucoma

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2016年第2期9卷 249-252页

作者： Esra Ergan Faruk Ozturk Emrullah Beyazyildiz Ufuk Elgin Emine sen Ali Bulent Cankaya Tugrul Celik Department of Ophthalmology Amasya UniversitySabuncuoglu Serefeddin Research and Training Hospital Department of Ophthalmology Hacettepe University Department of Ophthalmology Samsun Research and Training Hospital Department of Opthalmology Ulucanlar Eye Research Hospital Department of Biochemistry Turgut Ozal University

AIM： To evaluate total antioxidant status （TAS）, total oxidant status （TOS）, and the oxidative stress index （OSI） of the aqueous humor （AH） in patients with glaucoma. METHODS： The prospective study was composed of a study group （n-31） and a control group （n=31）. Fifteen patients in the study group were diagnosed with primary open angle glaucoma （POAG）, and 16 patients were diagnosed with pseudoexfoliation glaucoma （PEG）. The control group was composed of non-glaucomatous patients with cataracts. AH samples were collected and analyzed for TAS, TOS, and OSI levels. RESULTS： Mean AH TAS level was significantly higher in patients with glaucoma than that in the control group （P〈0.01）. Mean TOS and OSI levels tended to increase in patients with glaucoma. No significant differences in TAS, TOS, or OSI levels were observed between patients with POAG and PEG. CONCLUSION： High levels of TAS were observed in patients with glaucoma, which was likely a response to the increased oxidative stress observed in these patients.

关键词： oxidative stress primary open angleglaucoma pseudoexfoliation glaucoma total antioxidantstatus total oxidant status

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高频电磁场防垢技术在火电厂的应用

中国电力 2000年第7期33卷 27-30页

作者：王茂森姜涛济南广维高新技术联合研究所山东济南250100 济南开发区中源电力水处理技术中心山东济南250100

火电厂水力输灰管道普遍存在发管结垢问题，通常采用化学方法或物理方法的防垢措施。经实践应用，这些防垢措施有一定的局限性。为此，介绍一种利用高频电磁场防垢技术，经在佳木斯策二火电厂等电厂的应用取得良好效果。

关键词：结垢高频电磁场防垢技术锅炉火电厂

Genus-decreasing relation of Gromov-Witten invariants for surfaces under blow-up

在线全文

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2021年第4期16卷 1075-1087页

作者： Xiliang wang Department of Mathematics Sun Yat-Sen UniversityGuangzhou 510275China

Using the degeneration formula,we study the change of Gromov-Witten invariants under blow-up for symplectic 4-manifolds and obtain a genus-decreasing relation of Gromov-Witten invariant of symplectic four manifold und... 详细信息

关键词： Gromov-Witten invariant blow-up degeneration formula