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Parametric analysis of craniocerebral injury mechanism in pedestrian trafficaccidents based on finite element methods

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Chinese Journal of Traumatology 2024年第4期27卷 187-199页

作者： Jin-Ming Wang Zheng-Dong Li Chang-Sheng Cai Ying Fan Xin-Biao Liao Fu zhang jian-hua zhang Dong-hua Zou Academy of Forensic Science Shanghai Key Laboratory of Forensic MedicineKey Laboratory of Forensic ScienceMinistry of JusticeShanghai Forensic Service PlatformShanghai200063China School of Forensic Medicine Guizhou Medical UniversityGuiyang550004China Key Laboratory of Forensic Pathology Ministry of Public Security PR ChinaGuangzhou510050China

Purpose:The toughest challenge in pedestrian traffic accident identification lies in ascertaining *** study aimed to systematically simulate and parameterize 3 types of craniocerebral injuryincluding impact injury,fall injury,and run-over injury,to compare the injury response outcomes ofdifferent injury ***:Based on the total human model for safety(THUMS)and its enhanced human model THUMShollow structures,a total of 84 simulations with 3 injury manners,different loading directions,andloading velocities were *** Mises stress,intracranial pressure,maximum principal strain,cumulative strain damage measure,shear stress,and cranial strain were employed to analyze the injuryresponse of all areas of the *** examine the association between injury conditions and injuryconsequences,correlation analysis,principal component analysis,linear regression,and stepwise linearregression were ***:There is a significant correlation observed between each criterion of skull and brain injury(p40 km/h),the Von Mises stress on the skull waswith a high possibility exceed the threshold for skull fracture(100 MPa).When falling and makingtemporal and occipital contact with the ground,the opposite side of the impacted area experienceshigher frequency stress concentration than contact at other ***-over injuries tend to have amore comprehensive craniocerebral injury,with greater overall deformation due to more adequate kinetic energy *** mean value of maximum principal strain of brain and Von Mises stress ofcranium at run-over condition are 1.39 and 403.8 MPa,while they were 1.31,94.11 MPa and 0.64,120.5 MPa for the impact and fall conditions,*** impact velocity also plays a significant rolein craniocerebral injury in impact and fall loading conditions(the p

关键词： Craniocerebral injury Finite element Injury mechanism Traffic accident Biomechanism Forensic practice

Current Mycoplasma pneumoniae epidemic among children in Shanghai:unusual pneumonia caused by usual pathogen

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World Journal of Pediatrics 2024年第1期20卷 5-10页

作者： Xiao-Bo zhang Wen He Yong-Hao Gui Quan Lu Yong Yin jian-hua zhang Xiao-Yan Dong Ying-Wen Wang Ying-Zi Ye Hong Xu Jia-Yu Wang Bing Shen Dan-Ping Gu Li-Bo Wang Yi Wang Department of Respiratory Medicine Children's Hospital of Fudan University399 Wanyuan RoadShanghai 201102China State Key Laboratory of Genetic Engineering at School of Life Sciences Institute of Reproduction&DevelopmentChildren's Hospital of Fudan UniversityShanghaiChina Department of Respiratory Medicine Children's Hospital of Shanghai Jiao Tong UniversityShanghaiChina Department of Respiratory Medicine Shanghai Children's Medical CenterAffiliated to Shanghai Jiaotong University School of MedicineShanghaiChina Department of Pediatric Respiratory Xinhua HospitalAffiliated to Shanghai Jiaotong University School of MedicineShanghaiChina Department of Nursing Children's Hospital of Fudan UniversityShanghaiChina Department of Infectious Diseases Children's Hospital of Fudan UniversityShanghaiChina Department of Nephrology Children's Hospital of Fudan UniversityShanghaiChina NHC Key Laboratory of Neonatal Diseases Children's Hospital of Fudan UniversityShanghaiChina Shanghai Shenkang Hospital Development Center ShanghaiChina Center for Medical Quality Control Management of Shanghai ShanghaiChina Department of Neurology Children's Hospital of Fudan University399Wanyuan RoadShanghai 201102China

Mycoplasma pneumoniae(***),primarily transmitted through respiratory droplets when infected individuals cough or sneeze,is a common cause of communityacquired pneumonia,especially among school-age children and *** infection occurs endemically with an epidemic peak every few *** worldwide incidence confirmed by direct test methods was reported to be 8.61%between 2017 and 2020 across all age groups[1].

关键词： pneumonia epidemic respiratory

Hepatoid adenocarcinoma of the lung:A case report

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World Journal of Clinical Cases 2024年第21期12卷 4813-4819页

作者： Yi-Jun Mo Li-Na Lin Jing-Li Tao Tao zhang jian-hua zhang Department of Thoracic Surgery Shenzhen HospitalSouthern Medical UniversityShenzhen 518104Guangdong ProvinceChina School of Nursing Guangzhou Xinhua UniversityGuangzhou 510520Guangdong ProvinceChina Department of Pathology Shenzhen HospitalSouthern Medical UniversityShenzhen 518104Guangdong ProvinceChina

BACKGROUND Hepatoid adenocarcinoma of the lung(HAL)is a rare type of non-small cell lung cancer(NSCLC),histologically similar to hepatocellular *** has high malignancy and poor prognosis,and a better treatment plan needs further *** SUMMARY In order to deeply understand the occurrence and development of HAL,here we report a case of HAL with extensive metastasis of alpha fetoprotein negative KRAS A146T *** patient refused chemotherapy and received one course of treatment(immune checkpoint inhibitors),and died three months later due to progressive *** HAL is a special type of *** surgical treatment of HAL in the limited stage can achieve long-term survival,but most of them were in the advanced stage when they were found,and the prognosis was poor,which requires multidisciplinary comprehensive treatment.

关键词： Hepatoid adenocarcinoma Histopathological characteristics Non-small cell lung cancer Hepatoid adenocarcinoma of the lung Case report

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人造黑色素染发材料

高分子学报 2024年第2期55卷 192-201页

作者：杨磊张小康张键华胡俊飞张婷顾志鹏李乙文四川大学高分子科学与工程学院高分子材料工程国家重点实验室成都610065

传统仿生人造黑色素聚多巴胺(PDA)染发过程中涉及的过强碱性会使毛发粗糙影响发质,大量的金属离子则存在安全性问题.本工作利用黑色素单体5,6-二羟基吲哚(DHI)能够在温和条件下仅通过空气氧化发生快速聚合的特点,报道了一种通过温和条... 详细信息

传统仿生人造黑色素聚多巴胺(PDA)染发过程中涉及的过强碱性会使毛发粗糙影响发质,大量的金属离子则存在安全性问题.本工作利用黑色素单体5,6-二羟基吲哚(DHI)能够在温和条件下仅通过空气氧化发生快速聚合的特点,报道了一种通过温和条件在头发表面和内部原位聚合的人造黑色素染发材料.染发色度值L=21,与自然黑发基本一致,洗涤30次后L=25,耐洗涤性良好,染色后头发拉伸强度189 MPa,断裂伸长率51%,相比染色前发质有所改善.研究结果表明,此类染发剂染发条件温和(空气氧化),色度自然,固色持久,有助于改善发质,生物安全性良好,为开发新一代染发剂提供了创新的设计策略和可靠的工具平台.

关键词：人造黑色素聚二羟基吲哚染发剂仿生材料

Jordan Higher Derivable Maps on Triangular Algebras by Commutative Zero Products

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Acta Mathematica Sinica,English Series 2016年第2期32卷 258-264页

作者： Dan LIU jian hua zhang College of Mathematics and Information Science Shaanxi Normal University

In this paper, the structure of Jordan higher derivable maps on triangular algebras by commutative zero products is given. As an application, the form of Jordan higher derivable maps of nest algebras by commutative ze... 详细信息

关键词： Triangular algebra Jordan higher derivable map commutative zero product

Layered space time codes and capacity analysis in correlated fading channels with distributed antenna system

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The Journal of China Universities of Posts and Telecommunications 2011年第1期18卷 28-35页

作者： XIONG Fei zhang jian-hua zhang Ping Wireless Technology Innovation Institute Key Laboratory of Universal Wireless Communication Ministry of Education 13eijing University of Posts and Telecommunications Beijing 100876 China

In this paper we have investigated the performance of downlink generalized distributed antenna system （GDAS）. Under the assumption of spatial correlated fading conditions, we have derived the numeric expression of correlated coefficients according to series of Bessel function, and have lifted the range restriction of the mean angle of incident. Moreover, the architecture of distributed generalized layered space time codes （GLST） has been considered in order to achieve both multiplexing gain and diversity gain while we have used basis vector from null space instead of orthogonal set to obtain the same system performance but with lower complexity. Furthermore, in order to maximize the capacity, Gerschgorin circles based fast antenna selection algorithms have been evaluated including a discussion of those simulation results.

关键词： GDAS GLST capacity correlated fading channel

Regulation Mechanisms of Stomatal Oscillation

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Journal of Integrative Plant Biology 2005年第10期47卷 1159-1172页

作者： Hui-Min YANG jian-hua zhang Xiao-Yan zhang Department of Biology Hong Kong Baptist University Hong Kong SAR China School of Pastoral Agriculture Science and Technology Lanzhou University Gansu Grassland Ecological Research Institute Lanzhou 730020 Chin

Stomata function as the gates between the plant and the atmospheric environment. Stomatal movement, including stomatal opening and closing, controls CO2 absorption as the raw material for photosynthesis and water loss through transpiration. How to reduce water loss and maintain enough CO2 absorption has been an interesting research topic for some time. Simple stomatal opening may elevate CO2 absorption, but, in the meantime, promote the water loss, whereas simple closing of stomatal pores may reduce both water loss and CO2 absorption, resulting in impairment of plant photosynthesis. Both processes are not economical to the plant. As a special rhythmic stomatal movement that usually occurs at smaller stomatal apertures, stomatal oscillation can keep CO2 absorption at a sufficient level and reduce water loss at the same time, suggesting a potential improvement in water use efficiency. Stomatal oscillation is usually found after a sudden change in one environmental factor in relatively constant environments. Many environmental stimuli can induce stomatal oscillation. It appears that, at the physiological level, feedback controls are involved in stomatal oscillation. At the cellular level, possibly two different patterns exist：（i） a quicker responsive pattern; and （ii） a slower response. Both involve water potential changes and water channel regulation, but the mechanisms of regulation of the two patterns are different. Some evidence suggests that the regulation of water channels may play a vital and primary role in stomatal oscillation. The present review summarizes studies on stomatal oscillation and concludes with some discussion regarding the mechanisms of regulation of stomatal oscillation.

关键词： Ca^2+ signaling guard cell plant stress signaling plant water relation stomatal oscillation water channel.

Indoor channel characteristics based on wideband MIMO measurements at 5.25 GHz

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The Journal of China Universities of Posts and Telecommunications 2008年第4期15卷 46-50页

作者： GAO Xin-ying zhang jian-hua zhang Ping Key Laboratory of Universal Wireless Communications Ministry of Education Wireless Technology Innovation Institute Beijing University of Posts and Telecommunications Beijing 100876 China

Extensive indoor channel measurements were conducted in Beijing with wideband multiple-input multiple-output （MIMO） sounder at 5.25 GHz. Both line-of-sight （LOS） and non-line-of-sight （NLOS） propagation were measured in the indoor office and hotspot scenarios. On the basis of measured data, statistical channel characteristics are presented in this article, including the empirical path loss （PL） models, three excess delay parameters, circular azimuth spread （CAS）, and circular elevation spread （CES）. Comparative analysis of different propagation mechanisms in two scenarios is conducted. These values are significant for indoor coverage and technical research of MIMO and orthogonal frequency division multiplexing （OFDM） for the international mobile telecommunications-advanced （IMT-Advanced） system.

关键词： channel measurement wideband MIMO path loss excess delay circular azimuth spread circular elevation spread IMT-Advanced

Analysis of black water aggregation in Taihu Lake

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Water Science and Engineering 2011年第4期4卷 374-385页

作者： Gui-hua LU Qian MA jian-hua zhang National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety Hohai University Nanjing 210098 P. R. China Hydrology and Water Resources Investigation Bureau of jiangsu Province Nanjing 210029 P. R. China Water Resources Department of jiangsu Province Nanjing 210029 P R. China

Black water aggregation （BWA） in Taihu Lake is a disaster for the lake environment. It is a phenomenon resulting from water environmental deterioration and eutrophication caused by accumulation of pollutants in the lake, according to research on the water quality, pollutants of BWA, and occurrence mechanisms of BWA. Dead algae are the material base of BWA, the polluted sediment is an important factor for the formation of BWA, and hydrological and meteorological conditions such as sun light, air temperature, wind speed, and water flow are the other factors that may lead to the formation of BWA. Thioether substances such as dimethyl trisulfide are the representative pollutants of BWA. Parameters such as chlorophyll-a, DO, pH, and water temperature are sensitive indicators of BWA. Measures such as algae collection, ecological dredging, pollution control, and water diversion from the Yangtze River to the lake, are effective, and strengthening aeration is an emergency measure to control BWA.

关键词： black water aggregation water quality indicator control measure Taihu Lake