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305篇 您的检索式:作者名="Pan XIONG"
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1A rapid advice guideline for the diagnosis and treatment of 2019 novel coronavirus(2019-nCoV) infected pneumonia(standard version)显示文摘In December 2019, a new type viral pneumonia cases occurred in Wuhan, Hubei Province;and then named '2019 novel coronavirus(2019-nCoV)' by the World Health Organization(WHO) on 12 January 2020. For it is a never been experienced respiratory disease before and with infection ability widely and quickly, it attracted the world’s attention but without treatment and control manual. For the request from frontline clinicians and public health professionals of 2019-nCoV infected pneumonia management, an evidence-based guideline urgently needs to be developed. Therefore, we drafted this guideline according to the rapid advice guidelines methodology and general rules of WHO guideline development;we also added the first-hand management data of Zhongnan Hospital of Wuhan University. This guideline includes the guideline methodology, epidemiological characteristics, disease screening and population prevention, diagnosis, treatment and control(including traditional Chinese Medicine), nosocomial infection prevention and control, and disease nursing of the 2019-nCoV. Moreover, we also provide a whole process of a successful treatment case of the severe 2019-nCoV infected pneumonia and experience and lessons of hospital rescue for 2019-nCoV infections. This rapid advice guideline is suitable for the first frontline doctors and nurses, managers of hospitals and healthcare sections, community residents, public health persons, relevant researchers, and all person who are interested in the 2019-nCoV.Ying-Hui Jin Lin Cai Zhen-Shun Cheng Hong Cheng Tong Deng Yi-Pin Fan Cheng Fang Di Huang Lu-Qi Huang Qiao Huang Yong Han Bo Hu Fen Hu Bing-Hui Li Yi-Rong Li Ke Liang Li-Kai Lin Li-Sha Luo Jing Ma Lin-Lu Ma Zhi-Yong Peng Yun-Bao Pan Zhen-Yu Pan Xue-Qun Ren Hui-Min Sun Ying Wang Yun-Yun Wang Hong Weng Chao-Jie Wei Dong-Fang Wu Jian Xia Yong Xiong Hai-Bo Xu Xiao-Mei Yao Yu-Feng Yuan Tai-Sheng Ye Xiao-Chun Zhang Ying-Wen Zhang Yin-Gao Zhang Hua-Min Zhang Yan Zhao Ming-Juan Zhao Hao Zi Xian-Tao Zeng Yong-Yan Wang Xing-Huan Wang 2020Military Medical Research2020,7,1:161
22018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents显示文摘Syncope belongs to the transient loss of consciousness(TLOC), characterized by a rapid onset, short duration, and spontaneous complete recovery. It is common in children and adolescents, accounting for 1% to 2% of emergency department visits.Recurrent syncope can seriously affect children's physical and mental health, learning ability and quality of life and sometimes cardiac syncope even poses a risk of sudden death. The present guideline for the diagnosis and treatment of syncope in children and adolescents was developed for guiding a better clinical management of pediatric syncope. Based on the globally recent development and the evidence-based data in China, 2018 Chinese Pediatric Cardiology Society(CPCS) guideline for diagnosis and treatment of syncope in children and adolescents was jointly prepared by the Pediatric Cardiology Society, Chinese Pediatric Society, Chinese Medical Association(CMA)/Committee on Pediatric Syncope, Pediatricians Branch, Chinese Medical Doctor Association(CMDA)/Committee on Pediatric Cardiology, Chinese College of Cardiovascular Physicians, Chinese Medical Doctor Association(CMDA)/Pediatric Cardiology Society, Beijing Pediatric Society, Beijing Medical Association(BMA). The present guideline includes the underlying diseases of syncope in children and adolescents, the diagnostic procedures, methodology and clinical significance of standing test and headup tilt test, the clinical diagnosis vasovagal syncope, postural orthostatic tachycardia syndrome, orthostatic hypotension and orthostatic hypertension, and the treatment of syncope as well as follow-up.Cheng Wang Yaqi Li Ying Liao Hong Tian Min Huang Xiangyu Dong Lin Shi Jinghui Sun Hongfang Jin Junbao Du Jindou An Jie Chen Mingwu Chen Qi Chen Sun Chen Yonghong Chen Zhi Chen Adolphus Kai-tung Chau Junbao Du Zhongdong Du Junkai Duan Hongyu Duan Xiangyu Dong Lin Feng Lijun Fu Fangqi Gong Yonghao Gui Ling Han Zhenhui Han Bing He Zhixu He Xiufen Hu Yimin Hua Guoying Huang Min Huang Ping Huang Yujuan Huang Hongfang Jin Mei Jin Bo Li Fen Li Tao Li Xiaohui Li Xiaoyan Liu Yan Li Haitao Lv Tiewei Lv Zipu Li Luyi Ma Silin Pan Yusheng Pang Hua Peng Yuming Qin Jie Shen Lin Shi Kun Sun Jinghui Sun Hong Tian Jie Tian Cheng Wang Hong Wang Lei Wang Jinju Wang Wendi Wang Yuli Wang Rongzhou Wu Tianhe Xia Yanyan Xiao Chunhong Xie Yanlin Xing Zhenyu Xiong Baoyuan Xu Yi Xu Hui Yan Shiwei Yang Qijian Yi Xia Yu Xianyi Yu Yue Yuan Hongyan Zhang Huili Zhang Li Zhang Qingyou Zhang Xi Zhang Yanmin Zhang Zhiwei Zhang Cuifen Zhao Bin Zhou Hua Zhu 2018Science Bulletin2018,63,23:54
3A Rare Allele of GS2 Enhances Grain Size anc Grain Yield in Rice显示文摘谷物尺寸决定谷物重量并且影响谷物质量。调整谷物尺寸的几主要量的特点 loci (QTL ) 被克隆;然而,我们调整米饭谷物的尺寸的内在的机制的理解仍然保持碎片。这里,我们报导克隆和主导的 QTL 的描述,染色体 2 上的谷物尺寸(GS2 ) 编码调整生长的因素 4,一个 transcriptional 管理者。GS2 本地化到原子核并且可以充当抄写使活跃之物。影响 microRNA 的有约束力的地点的 GS2 的一个稀罕变化, OsmiR396c,原因提高了 GS2/OsGRF4 的表示。GS2 表示的增加导致更大的房间和房间的增加的数字,它因此提高谷物重量和产量。进米饭栽培变种的 GS2/OsGRF4 的这稀罕等位基因的介绍能显著地提高谷物重量和增加谷物产量,用在引起产量很高的米饭变化的可能的应用。Jiang Hu Yuexing Wang Yunxia Fang Longjun Zeng Jie Xu Haiping Yu Zhenyuan Shi Jiangjie Pan Dong Zhang Shujing Kang Li Zhu Guojun Dong Longbiao Guo Dali Zeng Guangheng Zhang Lihong Xie Guosheng Xiong Jiayang Li Qian Qian 2015Molecular Plant2015,8,10:57
4Research advances in magnesium and magnesium alloys worldwide in 2020显示文摘Research on magnesium alloys continues to attract great attention,with more than 3000 papers on magnesium and magnesium alloys published and indexed in SCI in 2020 alone.The results of bibliometric analyses show that microstructure control and mechanical properties of Mg alloys are continuously the main research focus,and the corrosion and protection of Mg alloys are still widely concerned.The emerging research hot spots are mainly on functional magnesium materials,such as Mg ion batteries,hydrogen storage Mg materials,and bio-magnesium alloys.Great contributions to the research and development of magnesium alloys in 2020 have been made by Chongqing University,Chinese Academy of Sciences,Central South University,Shanghai Jiaotong University,Northeastern University,Helmholtz Zentrum Geesthacht,etc.The directions for future research are suggested,including:1)the synergistic control of microstructures to achieve high-performance magnesium alloys with concurrent high strength and superior plasticity along with high corrosion resistance and low cost;2)further development of functional magnesium materials such as Mg batteries,hydrogen storage Mg materials,structural-functional materials and bio-magnesium materials;3)studies on the effective corrosion protection and control of degradation rate of magnesium alloys;4)further improvement of advanced processing technology on Mg alloys.Yan Yang Xiaoming Xiong Jing Chen Xiaodong Peng Daolun Chen Fusheng Pan 2021Journal of Magnesium and Alloys2021,9,3:52
5Mortality and Morbidity of Extremely Low Birth Weight Infants in the Mainland of China: A Multi-center Study显示文摘Hui-Jia Lin Li-Zhong Du Xiao-Lu Ma Li-Ping Shi Jia-Hua Pan Xiao-Mei Tong Qiu-Ping Li Jian-Guo Zhou Bing Yi Ling Liu Yun-Bing Chen Qiu-Fen Wei Hui-Qing Wu Mei Li Cui-Qing Li Xi-Rong Gao Shi-Wen Xia Wen-Bin Li Chao-Ying Ya Ling He Kun Liang Xiao-Yu Zhou Shu-Ping Han Qin Lyu Yin-Ping Qiu Wen Li Dong-Mei Chen Hong-Ru Lu Xiao-Hong Liu Hong Liu Zhen-Lang Lin Li Liu Jia-Jun Zhu Hong Xiong Shao-Jie Yue Si-Qi Zhuang 2015Chinese Medical Journal2015,,20:49
6Epidemiology of fungal infections in China显示文摘与 immunocompromised 主人的增加的数字,真菌的感染的流行病学的特征经历了世界范围的庞大的变化,在中国包括。在这份报纸,我们越过中国在真菌病上考察了存在数据总结可得到的流行病学的侧面。我们发现在中国的表面的真菌的感染的一般发生是稳定的,但是癣 capitis 的发生减少了,传播线路变化了。由对比,侵略真菌的感染的全面发生继续升起了。candidemia 的出现由除 C 以外的 Candida 种类引起了。albicans 和不平常的 Candida 种类最近在中国增加了的包括的一些。曲霉属菌引起的感染也在最近的年里宣传了,特别地与 azole 抵抗的曲霉属菌 fumigatus 的出现。cryptococcosis 的一个增加的趋势在中国被注意了,与 Cryptococcus neoformans var。grubii 圣 5 遗传型作为占优势的病原体孤立。回顾的研究建议了在中国的 Pneumocystis 肺病的流行病学的特征可能类似于在另外的发展中的国家的那些。地方性的真菌的感染例如在东北中国的 sporotrichosis,必须引起研究,诊断,并且处理警戒。当前,在中国的真菌病上的流行病学的数据可变、碎片。因此,关于在中国的真菌的感染的全国流行病学的研究是对改进国家健康的重要需要。Min Chen Yuan Xu Nan Hong Yali Yang Wenzhi Lei Lin Du Jingjun Zhao Xia Lei Lin Xiong Langqi Cai Hui Xu Weihua Pan Wanqing Liao 2018Frontiers of Medicine2018,12,1:49
7Buyang Huanwu decoction increases angiopoietin-1 expression and promotes angiogenesis and functional outcome after focal cerebral ischemia显示文摘Jian SHEN Yu ZHU Hai YU Zuo-xu FAN Feng XIAO Pan WU Qi-hui ZHANG Xiao-xing XIONG Jian-wei PAN Ren-ya ZHAN 2014Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2014,15,3:36
8Magnetic resonance diffusion tensor imaging following major ozonated autohemotherapy for treatment of acute cerebral infarction显示文摘Major ozonated autohemotherapy has been shown to promote recovery of upper limb motor function in patients with acute cerebral infarction,but whether major ozonated autohemotherapy affects remote injury remains poorly understood.Here,we assumed that major ozonated autohemotherapy contributes to recovery of clinical function,possibly by reducing remote injury after acute cerebral infarction.Sixty acute cerebral infarction patients aged 30–80 years were equally and randomly allocated to ozone treatment and control groups.Patients in the ozone treatment group received medical treatment and major ozonated autohemotherapy(47 mg/L,100 m L ozone) for 10 ± 2 days.Patients in the control group received medical treatment only.National Institutes of Health Stroke Scale score,modified Rankin scale score,and reduced degree of fractional anisotropy values of brain magnetic resonance diffusion tensor imaging were remarkably decreased,brain function improved,clinical efficiency significantly increased,and no obvious adverse reactions detected in the ozone treatment group compared with the control group.These findings suggest that major ozonated autohemotherapy promotes recovery of neurological function in acute cerebral infarction patients by reducing remote injury,and additionally,exhibits high safety.Xiao-na Wu Tao Zhang Jun Wang Xiao-yan Liu Zhen-sheng Li Wei Xiang Wei-qing Du Hong-jun Yang Tie-gen Xiong Wen-ting Deng Kai-run Peng Su-yue Pan 2016Neural Regeneration Research2016,11,7:32
9Association of PINK1 and DJ-1 confers digenic inheritance of early-onset Parkinson's disease显示文摘Tang B Xiong H Sun P Zhang Y Wang D Hu Z Zhu Z Ma H Pan Q Xia JH Xia K Zhang Z 2006中国生物学文摘2006,20,8:30
10YAP promotes osteogenesis and suppresses adipogenic differentiation by regulatingβ-catenin signaling显示文摘YAP(yes-associated protein) is a transcriptional factor that is negatively regulated by Hippo pathway, a conserved pathway for the development and size control of multiple organs. The exact function of YAP in bone homeostasis remains controversial. Here we provide evidence for YAP's function in promoting osteogenesis, suppressing adipogenesis, and thus maintaining bone homeostasis.YAP is selectively expressed in osteoblast(OB)-lineage cells. Conditionally knocking out Yap in the OB lineage in mice reduces cell proliferation and OB differentiation and increases adipocyte formation, resulting in a trabecular bone loss. Mechanistically, YAP interacts with β-catenin and is necessary for maintenance of nuclear β-catenin level and Wnt/β-catenin signaling. Expression of β-catenin in YAP-deficient BMSCs(bone marrow stromal cells) diminishes the osteogenesis deficit. These results thus identify YAP-β-catenin as an important pathway for osteogenesis during adult bone remodeling and uncover a mechanism underlying YAP regulation of bone homeostasis.Jin-Xiu Pan Lei Xiong Kai Zhao Peng Zeng Bo Wang Fu-Lei Tang Dong Sun Hao-han Guo Xiao Yang Shun Cui Wen-Fang Xia Lin Mei Wen-Cheng Xiong 2018Bone Research2018,6,2:19
11Research advances of magnesium and magnesium alloys worldwide in 2021显示文摘More than 4000 papers in the field of Mg and Mg alloys were published and indexed in Web of Science(WoS)Core Collection database in 2021.The bibliometric analyses indicate that the microstructure,mechanical properties,and corrosion of Mg alloys still are the main research focus.Mg ion batteries and hydrogen storage Mg materials have attracted much attention.Significant contributions to the research and development of magnesium alloys were made by Chongqing University,Shanghai Jiaotong University,and Chinese Academy of Sciences in China,Helmholtz Zentrum Hereon in Germany,Ohio State University in the United States,the University of Queensland in Australia,Kumanto University in Japan,and Seoul National University in Korea,University of Tehran in Iran,etc..This review is aimed to summarize the progress in the development of structural and functional Mg and Mg alloys in 2021.Based on the issues and challenges identified here,some future research directions are suggested.Jiangfeng Song Jing Chen Xiaoming Xiong Xiaodong Peng Daolun Chen Fusheng Pan 2022Journal of Magnesium and Alloys2022,10,4:16
12Distribution and source of microplastics in China's second largest reservoir-Danjiangkou Reservoir显示文摘Fresh water microplastic pollution is of pressing concern globally,but its distribution and sources in reservoirs are poorly documented.Danjiangkou Reservoir is the second largest reservoir in China and is divided into the Han Reservoir and Dan Reservoir.In this work,microplastic abundances and morphological characteristics of the reservoir were investigated.The microplastic abundance of 15 main tributaries of the reservoir was also measured.The vertical distribution(in water column and sediment),horizontal distribution(in Han Reservoir and Dan Reservoir)and source of microplastics were analyzed.Microplastics accumulated in the middle layer of the reservoir,and the size and color of the microplastic particles changed from the surface to the bottom,which implies that surveys of surface water are not enough to determine the microplastic contamination for deep water reservoirs.In the surface water,the microplastic abundance in the Han Reservoir was lower than that in the Dan Reservoir(p<0.05),but microplastic abundance did not differ significantly in the intermediate and bottom water.Tributaries were one of the main sources of microplastics for Han Reservoir but not for Dan Reservoir.Agricultural cultivation in the hydro-fluctuation belt might be an important source of microplastics in the Dan Reservoir,which should be given additional attention.The results of this study can provide valuable information for developing microplastic sampling strategies in deep water reservoirs.Further studies are recommended to investigate the process through which microplastics in the hydro-fluctuation belt enter the reservoir and the sinking behavior of microplastics in the reservoir.Li Lin Xiong Pan Sheng Zhang Danwen Li Wenliang Zhai Zhen Wang Jingxiang Tao Changqing Mi Qingyun Li John C.Crittenden 2021Journal of Environmental Sciences2021,33,4:13
13A Solution on Pork Quality Traceability from Farm to Dinner Table in Tianjin City,China显示文摘In order to meet government supervision of pork production safety as well as consumer's right to know what they buy and protect the public safety of pork food,this study adopts animal identification,intelligent personal digital assistant(PDA) reading and writing,general packet radio service(GPRS),and other information technologies,proposes a pork tracking and traceability inferstructure based on pork production substrace flow and data flow,designs the metadata structure and related datatbases for farming,slaughtering,and retailing sector based on intensive pig farming and smallhold pig farming,develops three different data-recording systems,and finally establishes a public network platform for the information inquiry in light of 'the administrative rules on identification and rearing files for animal and poultry' in China.The farming process information system supplies early warning for the usage of drugs and feed additives based on data of every individual pig and timely uploading all events data to remote traceability database when pigs are sold;the PDA data collecting system can collect farming events data for pigs fed by farmers and submit to the center database by GPRS;the web-based Tianjin's pork traceability platform can integrate all identifications and related pork quality data from farming,slaughtering to marketing by online,and achieve pork tracking from product origin to consumption and tracing in the turnover direction.It is feasible to realize pork quality traceability by identification technologies developed and/or integrated,metadata specifications designed,three data-recording systems developed,and web-inquiring platform established.Some individual technical bottlenecks will be resolved with the development of communication technologies.The full implementation in Tianjin,China,will supply technical support for guaranteeing the quality and safety of pork production and meeting consumer's demands.XIONG Ben-hai FU Run-ting LIN Zhao-hui LUO Qing-yao YANG Liang PAN Jia-rong 2010Agricultural Sciences in China2010,9,1:12
14Piperlongumine induces apoptotic and autophagic death of the primary myeloid leukemia cells from patients via activation of ROS-p38/JNK pathways显示文摘瞄准: 调查 piperlongumine (PL ) 的效果,从长辣椒植物的 anticancer 碱,在从病人和行动的机制的主要 myeloid 白血病房间上。Xin-xin XIONG Ju-mei LIU Xin-yao QIU Feng PAN Shang-bin YU Xiao-qian CHEN 2015Acta Pharmacologica Sinica2015,36,3:12
15The enhanced X-ray Timing and Polarimetry mission—eXTP显示文摘In this paper we present the enhanced X-ray Timing and Polarimetry mission—eXTP. eXTP is a space science mission designed to study fundamental physics under extreme conditions of density, gravity and magnetism. The mission aims at determining the equation of state of matter at supra-nuclear density, measuring effects of QED, and understanding the dynamics of matter in strong-field gravity. In addition to investigating fundamental physics, eXTP will be a very powerful observatory for astrophysics that will provide observations of unprecedented quality on a variety of galactic and extragalactic objects. In particular, its wide field monitoring capabilities will be highly instrumental to detect the electro-magnetic counterparts of gravitational wave sources.The paper provides a detailed description of:(1) the technological and technical aspects, and the expected performance of the instruments of the scientific payload;(2) the elements and functions of the mission, from the spacecraft to the ground segment.ShuangNan Zhang Andrea Santangelo Marco Feroci YuPeng Xu FangJun Lu Yong Chen Hua Feng Shu Zhang Sφren Brandt Margarita Hernanz Luca Baldini Enrico Bozzo Riccardo Campana Alessandra De Rosa YongWei Dong Yuri Evangelista Vladimir Karas Norbert Meidinger Aline Meuris Kirpal Nandra Teng Pan Giovanni Pareschi Piotr Orleanski QiuShi Huang Stephane Schanne Giorgia Sironi Daniele Spiga Jiri Svoboda Gianpiero Tagliaferri Christoph Tenzer Andrea Vacchi Silvia Zane Dave Walton ZhanShan Wang Berend Winter Xin Wu Jean J.M.in't Zand Mahdi Ahangarianabhari Giovanni Ambrosi Filippo Ambrosino Marco Barbera Stefano Basso Jörg Bayer Ronaldo Bellazzini Pierluigi Bellutti Bruna Bertucci Giuseppe Bertuccio Giacomo Borghi XueLei Cao Franck Cadoux Francesco Ceraudo TianXiang Chen Yu Peng Chen Jerome Chevenez Marta Civitani Wei Cui WeiWei Cui Thomas Dauser Ettore Del Monte Sergio Di Cosimo Sebastian Diebold Victor Doroshenko Michal Dovciak YuanYuan Du Lorenzo Ducci QingMei Fan Yannick Favre Fabio Fuschino JoséLuis Ga'lvez Min Gao MingYu Ge Olivier Gevin Marco Grassi QuanYing Gu YuDong Gu DaWei Han Bin Hong Wei Hu Long Ji ShuMei Jia WeiChun Jiang Thomas Kennedy Ingo Kreykenbohm Irfan Kuvvetli Claudio Labanti Luca Latronico Gang Li MaoShun Li Xian Li Wei Li ZhengWei Li Olivier Limousin HongWei Liu XiaoJing Liu Bo Lu Tao Luo Daniele Macera Piero Malcovati Adrian Martindale Malgorzata Michalska Bin Meng Massimo Minuti Alfredo Morbidini Fabio Muleri Stephane Paltani Emanuele Perinati Antonino Picciotto Claudio Piemonte JinLu Qu Alexandre Rachevski Irina Rashevskaya Jerome Rodriguez Thomas Schanz ZhengXiang Shen LiZhi Sheng JiangBo Song LiMing Song Carmelo Sgro Liang Sun Ying Tan Phil Uttley Bo Wang DianLong Wang GuoFeng Wang Juan Wang LangPing Wang YuSa Wang Anna L.Watts XiangYang Wen Jörn Wilms ShaoLin Xiong JiaWei Yang Sheng Yang YanJi Yang Nian Yu WenDa Zhang Gianluigi Zampa Nicola Zampa Andrzej A.Zdziarski AiMei Zhang ChengMo Zhang Fan Zhang Long Zhang Tong Zhang Yi Zhang XiaoLi Zhang ZiLiang Zhang BaoSheng Zhao ShiJie Zheng Yu Peng Zhou Nicola Zorzi J.Frans Zwart 2019Science China(Physics,Mechanics & Astronomy)2019,62,2:11
16Yin Yang 1(YY1) synergizes with Smad7 to inhibit TGF-β signaling in the nucleus显示文摘As a prototype of the TGF-βsuperfamily cytokines,TGF-βis well known for its diverse roles in embryogenesis and adult tissue homeostasis.TGF-βevokes cellular responses by signaling mainly through cell membrane receptors and transcription factor R-Smads and Co-Smad(Smad4),while an inhibitory Smad,Smad7,acts as a critical negative regulator of TGF-βsignaling.Smad7 antagonizes TGF-βsignaling by regulating the stability or activity of the receptors or blocking the DNA binding of the functional R-Smad-Smad4 complex in the nucleus.However,the function of Smad7 in the nucleus is not fully understood.Yin Yang 1(YY1)is a ubiquitously expressed transcription factor with multiple functions.It has been reported that YY1 can inhibit Smad-dependent transcriptional responses and TGF-β/BMP-induced cell differentiation independently of its DNA binding ability.In this study,we found that Smad7 interacts with YY1 and the interaction is attenuated by TGF-βsignaling.Reporter assays and target gene expression analyses revealed that Smad7 and YY1 act in concert to inhibit TGF-β-induced transcription in the nucleus.Furthermore,Smad7 could enhance the interaction of YY1 with the histone deacetylase HDAC1.Consistently,YY1 and HDAC1 augmented the transcription repression activity of Smad7 in Gal4-luciferase reporter analysis.Therefore,our findings define a novel mechanism of Smad7 and YY1 to antagonize TGF-βsignaling.YAN XiaoHua PAN Jun XIONG WanWan CHENG MinZhang SUN YingYuan ZHANG SuPing CHEN YeGuang 2014Science China(Life Sciences)2014,57,1:10
17Three-Dimensional Multi-mesh Material Point Method for Solving Collision Problems显示文摘为三维的材料点方法的一个新多网孔接触算法被介绍。接触算法忠实地恢复在碰撞身体之间的相反的代理力量。在常规身体或僵硬身体之间的碰撞过程在一样的框架以内被对待。动量和团的多值在每个节点上被定义描述接触 / 幻灯片 / 分离过程。在接触表面的每个粒子的正常、正切的速度在各自的单个网孔被计算。库仑磨擦被使用描述在联系身体之间滑动或滑倒。接触算法的效率是线性地与联系身体的数字有关因为当节的动量和团被形成在时,重叠节点被打扫所有身体的材料粒子标记每次走。数字模拟证明我们的接触算法拥有高精确性和低数字精力驱散,它为解决碰撞问题是很重要的。PAN Xiao-Fei XU Ai-Guo ZHANG Guang-Cai ZHANG Ping ZHU Jian-Shi MA Shang ZHANG Xiong 2008Communications in Theoretical Physics2008,49,5:10
18Stems and leaves of Aconitum carmichaelii Debx.as potential herbal resources for treating rheumatoid arthritis: Chemical analysis,toxicity and activity evaluation显示文摘According to folk usage of Aconitum carmichaelii Debx., the present study was designed to determine the feasibility of the stems and leaves of Aconitum carmichaelii Debx. as a new medicinal resource. Fourteen alkaloids in mother roots, fibrous roots, stems, and leaves of Aconitum carmichaelii Debx. were measured by HPLC-MS/MS. And multivariate analysis methods, such as clustering analysis and principal component analysis, were applied to analyze the difference among various parts. In addition, the acute toxicity, analgesia, and anti-inflammatory tests were carried out. The results suggested that the contents of alkaloids in mother roots and fibrous roots were approximate, but those of leaves and stems were different from mother roots and fibrous roots. The results of the acute toxicity testing demonstrated the toxicity of fibrous root was strongest, and mother roots were slightly less toxic than fibrous roots. The stems and leaves were far less toxic than mother and fibrous roots. In addition, the analgesia and inflammatory tests showed the effects of the various tissues had no difference each other. These results provided a basis for developing new complementary and alternative treatments for rheumatoid arthritis patients. Simultaneously, the approach may also turn wastes into treasure and promote the development of circular economy.HE Ya-Nan OU Shui-Ping XIONG Xi PAN Yuan PEI Jin XU Run-Chun GENG Fu-Neng HAN Li ZHANG Ding-Kun YANG Ming 2018Chinese Journal of Natural Medicines2018,16,9:10
19Monitoring the impact of climate change and human activities on grassland vegetation dynamics in the northeastern Qinghai-Tibet Plateau of China during 2000–2015显示文摘Climate change and human activities can influence vegetation net primary productivity(NPP), a key component of natural ecosystems. The Qinghai-Tibet Plateau of China, in spite of its significant natural and cultural values, is one of the most susceptible regions to climate change and human disturbances in the world. To assess the impact of climate change and human activities on vegetation dynamics in the grassland ecosystems of the northeastern Qinghai-Tibet Plateau, we applied a time-series trend analysis to normalized difference vegetation index(NDVI) datasets from 2000 to 2015 and compared these spatiotemporal variations with trends in climatic variables over the same time period. The constrained ordination approach(redundancy analysis) was used to determine which climatic variables or human-related factors mostly influenced the variation of NDVI. Furthermore, in order to determine whether current conservation measures and programs are effective in ecological protection and reconstruction, we divided the northeastern Qinghai-Tibet Plateau into two parts: the Three-River Headwater conservation area(TRH zone) in the south and the non-conservation area(NTRH zone) in the north. The results indicated an overall(73.32%) increasing trend of vegetation NPP in grasslands throughout the study area. During the period 2000–2015, NDVI in the TRH and NTRH zones increased at the rates of 0.0015/a and 0.0020/a, respectively. Specifically, precipitation accounted for 9.2% of the total variation in NDVI, while temperature accounted for 13.4%. In addition, variation in vegetation NPP of grasslands responded not only to long-and short-term changes in climate, as conceptualized in non-equilibrium theory, but also to the impact of human activities and their associated perturbations. The redundancy analysis successfully separated the relative contributions of climate change and human activities, of which village population and agricultural gross domestic product were the two most important contributors to the NDVI changes, explaining 17.8% and 17.1% of the total variation of NDVI(with the total contribution >30.0%), respectively. The total contribution percentages of climate change and human activities to the NDVI variation were 27.5% and 34.9%, respectively, in the northeastern Qinghai-Tibet Plateau. Finally, our study shows that the grassland restoration in the study area was enhanced by protection measures and programs in the TRH zone, which explained 7.6% of the total variation in NDVI.XIONG Qinli XIAO Yang Marwa Waseem A HALMY Mohammed A DAKHIL LIANG Pinghan LIU Chenggang ZHANG Lin Bikram PANDEY PAN Kaiwen Sameh B EL KAFRAWAY CHEN Jun 2019Journal of Arid Land2019,11,5:10
20An overview of graphene-based hydroxyapatite composites for orthopedic applications显示文摘Hydroxyapatite(HA)is an attractive bioceramic for hard tissue repair and regeneration due to its physicochemical similarities to natural apatite.However,its low fracture toughness,poor tensile strength and weak wear resistance become major obstacles for potential clinical applications.One promising method to tackle with these problems is exploiting graphene and its derivatives(graphene oxide and reduced graphene oxide)as nanoscale reinforcement fillers to fabricate graphene-based hydroxyapatite composites in the form of powders,coatings and scaffolds.The last few years witnessed increasing numbers of studies on the preparation,mechanical and biological evaluations of these novel materials.Herein,various preparation techniques,mechanical behaviors and toughen mechanism,the in vitro/in vivo biocompatible analysis,antibacterial properties of the graphene-based HA composites are presented in this review.Ming Li Pan Xiong Feng Yan Sijie Li Changhong Ren Zhichen Yin Ang Li Huafang Li Xunming Ji Yufeng Zheng Yan Cheng 2018Bioactive Materials2018,3,1:9
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