|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Multiscale modeling of mechanical behavior and failure mechanism of 3D angle-interlock woven aluminum composites subjected to warp/weft directional tension loading显示文摘The mechanical behavior and progressive damage mechanism of novel aluminum matrix composites reinforced with 3D angle-interlock woven carbon fibers were investigated using a multiscale modeling approach.The mechanical properties and failure of yarns were evaluated using a microscale model under different loading scenarios.On this basis,a mesoscale model was developed to analyze the tensile behavior and failure mechanism of the composites.The interfacial decohesion,matrix damage,and failure of fibers and yarns were incorporated into the microscopic and mesoscopic models.The stress–strain curves and fracture modes from simulation show good agreement with the experimental curves and fracture morphology.Local interface and matrix damage initiate first under warp directional tension.Thereafter,interfacial failure,weft yarn cracking,and matrix failure occur successively.Axial fracture of warp yarn,which displays a quasi-ductile fracture characteristic,dominates the ultimate composites failure.Under weft directional tension,interfacial failure and warp yarn rupture occur at the early and middle stages.Matrix failure and weft yarn fracture emerge simultaneously at the final stage,leading to the cata-strophic failure of composites.The weft directional strength and fracture strain are lower than the warp directional ones because of the lower weft density and the more serious brittle fracture of weft yarns. | Zhenjun WANG Siyuan YANG Shiping SUN Yingfeng ZHANG Changchun CAI Bowen XIONG Wei YANG Zhifeng XU Huan YU | 2021 | Chinese Journal of Aeronautics2021，34，8： | 4 |
| 2 | Geochronology and Geochemical Characteristics of Intrusion in the Jinchangliang Gold Deposit,Inner Mongolia and Their Tectonic Significance显示文摘Discovered and mined in recent years, the Jinchangliang gold deposit has not yet been studied in its genetic type. In this paper, the geological features of ore deposit, S isotopic composition, metallogenic age and elements geochemical of the granite closely related to mineralization were discussed. The results of the geological features of ore deposit and S isotopic composition show that ore-bearing hydrothermal solution was closely related with the intrusion of magmatic. The granite is characteristic of high silica SiO_2=72.38%–72.98%, high aluminum and Al_2O_3=14.22%–14.35%, low calcium CaO=0.16% –0.26%, and low value of FeOT/MgO(6.86–7.73), and rich in alkalis Na_2O+K_2O=9.11%–9.24%, suggesting that it is high-K calc-alkaline, highly fractionated, weak aluminum A-type granite. The REE patterns are inclined to right and show intense fractionation between LREE and HREE, without obvious negative Eu anomaly(δEu=0.80–0.84). The primitive mantle-normalized spidergrams are characterized by depletion of Ba, U, Ta, Nb, Zr, Ti and P, which implies that the granite has the characteristics of the crust-mantle mixing. S isotopes also indicate that the material source of gold deposit is closely related to the granite rocks. The LA-ICP-MS Zircon UPb age of the Damiao rock mass medium-fine grained monzogranite(belonging to the early IndoChina) is(245±1) Ma. It shows that Jinchangliang gold deposit was not formed in Yanshanian, but the early Indo-China. Specifically speaking, the deposit was formed in the collision stage of the North China plate and the Siberian plate. | SUN Zhenjun SUN Guosheng YU Henan TIAN Yi LIU Shanli XIANG Zhu MENG Jian XUE Huaiyu LU Lina | 2015 | Acta Geologica Sinica(English Edition)2015，89，6： | 4 |
| 3 | High-throughput 3D reconstruction of stochastic heterogeneous microstructures in energy storage materials显示文摘Stochastic heterogeneous microstructures are widely applied in structural and functional materials,playing a crucial role in determining their performance.X-ray tomography and focused ion beam serial sectioning are frequently used methods to reconstruct three-dimensional(3D)microstructures,yet are demanding techniques and are resolution-limited.Here,a highthroughput multi-stage 3D reconstruction method via distance correlation functions is developed using a single representatively large-sized 2D micrograph for stochastic microstructures,and verified by X-ray micro-tomography datasets of isotropic and anisotropic solid oxide fuel cell electrodes.This method provides an economic,easy-to-use and high-throughput approach for reconstructing stochastic heterogeneous microstructures for energy conversion and storage devices,and can readily be extended to other materials. | Yanxiang Zhang Mufu Yan Yanhong Wan Zhenjun Jiao Yu Chen Fanglin Chen Changrong Xia Meng Ni | 2019 | npj Computational Materials2019，，1： | 3 |
| 4 | Computer Simulation of Mechanical Properties of Nano-scale Cu/FeS Composite显示文摘The mechanical properties of nano-scale Cu/FeS composite were simulated by molecular dynamics (MD) simulation in this paper. Through the analysis on the stress-strain curves, the results of MD simulation were in good agreement with mechanisms of macroscopic deformation. When the size of particles was smaller than a certain value, the relationship between yield strength and size, which was different from the large size crystals abided by the contrary Hall-Petch relationship. Based on the discussion of nano-scale Cu/FeS composite, some interesting conclusions were obtained. For example, the 'S' type curves were discovered in stress-strain curves and the anisotropy of FeS was very evident when the exposures of reinforcing phase (FeS) were different and so on. The basic theories and calculations of the composite that contains nano-scale particles were discussed. At the same time, a new modeling building method of composites, which was close to actual experiences, were considered in this paper. | Zhenjun Hong Jingchao Chen Jing Feng Yeping Du Jie Yu Lijuan Zhang Shuzhen Wu Futai Xu | 2010 | Journal of Materials Science & Technology2010，26，4： | 2 |
| 5 | Spatial variations in the trophic status of Favia palauensis corals in the South China Sea:Insights into their different adaptabilities under contrasting environmental conditions显示文摘Scleractinian corals exhibit a dual trophic pattern of autotrophic photosynthesis and heterotrophic predation.However,whether corals can adjust their trophic status under contrasting environmental conditions remains unclear.In our study,70 scleractinian corals(Favia palauensis)were collected from Sanya and the Xisha and Nansha Islands in the South China Sea.We measured the zooxanthellae density(ZD)andδ^(13)C of zooxanthellae(δ^(13)C_(z))and host tissue(δ^(13)C_(h))and analyzed the difference betweenδ^(13)C_(h) andδ^(13)C_(z)(i.e.,△^(h-z)^(13)C).The relatively high ZD andδ^(13)C_(z) values in the samples from Sanya indicate that these corals might have higher photosynthetic rates and autotrophic abilities than those from Xisha and Nansha.In contrast,the relatively lowδ^(13)C_(h) and△^(h-z)^(13)C values in the samples from Xisha and Nansha suggest that these corals might have a higher heterotrophic ability than those from Sanya.In addition,we tested the coral tissue biomass and skeletalδ^(13)C(δ^(13)C_(s))in the samples from Sanya and examined their correlations with△^(h-z)^(13)C.The results showed a negative correlation,indicating that the more the organic material produced by the coral,the stronger its heterotrophic ability.Our results show that corals can adjust their trophic status under different environmental and physiological conditions,which is essential for increasing their adaptability to different environmental conditions. | Shendong XU Zhinan ZHANG Kefu YU Xueyong HUANG Hanji CHEN Zhenjun QIN Risheng LIANG | 2021 | Science China Earth Sciences2021，64，6： | 2 |
| 6 | Effect of Build Direction on Fatigue Performance of L-PBF 316L Stainless Steel显示文摘The microstructure and fatigue and tensile properties of 316 L stainless steel fabricated via laser powder bed fusion(L-PBF)were investigated.Two 316 L stainless steel specimens with different loading directions which are either perpendicular to or parallel to building direction were prepared by L-PBF process.The results of X-ray diffraction tomography showed that there was no significant difference in morphology and size/distribution of the defects in the HB and VB samples.Since long axis of columnar grains is generally parallel to the build direction,the fatigue crack encounters more grain boundaries in VB samples under cyclic loading,which led to enhanced fatigue resistance of VB samples compared with HB sample.In contrast to HB sample,the VB sample has a higher fatigue strength due to a higher resistance to localized plastic deformation under cyclic loading.The differences in fatigue properties of L-PBF 316 L SS with different build directions were predominantly controlled by solidification microstructures. | Chenfan Yu Yuan Zhong Peng Zhang Zhenjun Zhang Congcong Zhao Zhefeng Zhang Zhijian Shen Wei Liu | 2020 | Acta Metallurgica Sinica(English Letters)2020，33，4： | 1 |
| 7 | Development of a Widely Applicable and Simple Prognostic Score for Patients with Acute-on-chronic Liver Failure显示文摘Background and Aims:Acute-on-chronic liver failure(ACLF)tends to progress rapidly with high short-term mortality.We aimed to create a widely applicable,simple prognostic(WASP)score for ACLF patients.Methods:A retrospective cohort of ACLF cases recruited from three centers in China were divided into training and validation sets to develop the new score.A prospective longitudinal cohort was recruited for further validation.Results:A total of 541 cases were included in the training set,and seven independent ACLF prognostic factors were screened to construct a new quantitative WASP-ACLF table.In the validation set of 671 cases,WASP-ACLF showed better predictive ability for 28-day and 90-day mortality than the currently used prognostic scores at baseline,day 3,week 1,and week 2.The predictive efficacy and clinical validity of the model improved over time.Patients were assigned to low-,intermediate-,and high-risk groups by their WASP-ACLF scores.Compared with the other two groups,intermediate-risk patients had a more uncertain prognosis,with a 90-day mortality of 44.4–50.6%.Sequential assessments at weeks 1 and 2 found the 90-day mortality of intermediate-risk groups was<20%forpatients with a≥2 point decrease in WASP-ACLF and was up to 56%for patients with a≥2 points increase.Similar results were observed in prospective data.Conclusions:The new ACLF prognostic score was simple,widely applicable,and had good predictive efficacy.Continuous assessments and trend of change in WASP-ACLF need to be considered,especially for intermediate-risk patients. | Zhenjun Yu Yu Zhang Yuhan Li Feng Zhou Manman Xu Shaoli You Yu Chen Bing Zhu Ming Kong Fangjiao Song Shaojie Xin Zhongping Duan Tao Han China Network for Severe Liver Diseases | 2022 | Journal of Clinical and Translational Hepatology2022，10，5： | 1 |
| 8 | Analysis of bacterial and fungal community structure in replant strawberry rhizosphere soil with denaatring gradient gel electro- phoresis显示文摘 | Li Anying Yu Wei Sun Zhenjun | 2012 | African Journal of Biotechnology2012，49，10： | 1 |
| 9 | Studies on influence of zinc immersion and fluoride on nickel electroplating on magnesium alloy AZ91D显示文摘 | Ziping Zhang Gang Yu Yuejun Ouyang Xiaomei He Bonian Hu Jun Zhang Zhenjun Wu | 2009 | Applied Surface Science2009，，17： | 1 |
| 10 | The Special Neuramin- idase Stalk-Motif Responsible for Increased Virulence and Pathogen- esis of H5N1 Influenz A Virus 显示文摘 | Hongbo Zhou Zhenjun Yu Yong Hu | 2009 | Plosone2009，4，： | 1 |
| 11 | LncRNA-Airn alleviates acute liver injury by inhibiting hepatocyte apoptosis via the NF-κB signaling pathway显示文摘Acute liver injury is a common and serious syndrome caused by multiple factors and unclear pathogenesis.If the injury persists,liver injury can lead to cirrhosis and liver failure and ultimately results in the development of liver cancer.Emerging evidence has indicated that long noncoding RNAs(lncRNAs)play an important role in the development of liver injury.However,the role of antisense Igf2r RNA(Airn)in acute liver injury and its underlying mechanism remain largely unclear.In this study,we show that Airn is upregulated in liver tissue and primary hepatocytes from an acute liver injury mouse model.Consistently,Airn is also overexpressed in serum samples of patients with acute-on-chronic liver failure and is negatively correlated with the Model for End-Stage Liver Disease(MELD)score.Moreover,gene knockout and rescue assays reveal that Airn alleviates CCl_(4)-induced liver injury by inhibiting hepatocyte apoptosis and oxidative stress in vivo.Further investigation reveals that Airn decreases H_(2)O_(2)-induced hepatocyte apoptosis in vitro.Mechanistically,we reveal that Airn represses CCl_(4)-and H_(2)O_(2)-induced enhancement of phosphorylation of p65 and IκBα,suggesting that Airn inhibits hepatocyte apoptosis by inactivating the NF-κB pathway.In conclusion,our results demonstrate that Airn can alleviate acute liver injury by inhibiting hepatocyte apoptosis via inactivating the NF-κB signaling pathway,and Airn could be a potential biomarker for acute liver injury. | Shuai Shao Yu Zhang Feng Zhou Xiaoxiang Meng Zhenjun Yu Guantong Li Lina Zheng Kun Zhang Yuhan Li Beichen Guo Qi Liu Mengxia Zhang Xiaoxiao Du Wei Hong Tao Han | 2022 | Acta Biochimica et Biophysica Sinica2022，54，11： | 1 |
| 12 | Dynamics,stability,and control of a four-cable mount system for wind tunnel test显示文摘A four-cable mount system is proposed for full-model wind tunnel flutter tests,which may adjust the pitch and roll attitude of the aircraft scaled model and ensure that the model is not subjected to cable tension.The system provides sufficient support to simulate the free flight of the aircraft by applying appropriate spring stiffness and cable tensions.The proposed fourcable mount system is modeled based on Lagrange mechanics,and its dynamics equations consider aerodynamic effects.The singularity of the system and its bifurcation characteristics under flow conditions are analysed to determine the supercritical bifurcation phenomenon for different tension levels and distances from the front suspension point to the mass centre of the model.The mathematical expressions of the longitudinal flight stability of the cable mount system are derived by linearising the system dynamics equations using small perturbations.The influence of the cable tension,spring stiffness,suspension point position,and other factors on the flight stability of the aircraft are analysed.A feedforward control algorithm is proposed to minimize the total elastic potential energy of the system.The results show that the model is in the level flight state when the elastic potential energy of the four-cable mount system is minimized.A feedback control design method is proposed based on the Lyapunov stability theory to derive the closed-loop stability conditions.The system dynamics model that includes the aircraft rigid body model,flexible cables,pulleys,springs,aerodynamic model,and servo motor control is established using the flexible multibody dynamics method.A multibody dynamics solver and Simulink are used to simulate the attitude adjustment of the model in the wind tunnel and verify the supercritical bifurcation characteristics of the system and the effectiveness of the feedback and feedforward control. | Zhenjun ZHAO Zhanwei ZHAO Yu YAN Kaichun ZENG Xiaojun SHI Han WU | 2023 | Chinese Journal of Aeronautics2023，36，2： | 0 |
| 13 | Xiaoping Dong,China CDC’s Chief Expert of Virology显示文摘Xiaoping Dong is the Chief Expert of Virology of China CDC,Adjunct Professor at Beijing University and Xi’an Jiaotong University,and Adjunct Principal Investigator(PI)at the Chinese Academy of Science and China Academy of Chinese Medical Sciences.He is a syndic of the Chinese Society of Microbiology and the Head of the Group of Medical Virology.During his roughly 40-year career,he has dedicated himself to the studies of medical virology and molecular biology. | Yu Chen Peter Hao Nankun Liu Zhenjun Li Jingjing Xi Feng Tan | 2021 | China CDC weekly2021，3，19： | 0 |
| 14 | Sleeve gastrectomy plus uncut jejunojejunal bypass for the treatment of obesity and type 2 diabetes显示文摘Bariatric metabolic surgery has been confirmed as an effective,safe,and feasible method for achieving weight loss,treating obesity-related diseases,and improving the quality of life.Due to its simplicity,sleeve gastrectomy(SG)has been more commonly used in the past ten years than Roux-en-Y gastric bypass(RYGB).^([1])However,RYGB is superior to SG in terms of excess weight loss effect and type 2 diabetes mellitus(T2DM)remission over a 5-year follow-up period. | Zhiwei Zhai Ganbin Li Yu Tao Zhenjun Wang Jiagang Han | 2022 | Chinese Medical Journal2022，135，18： | 0 |
| 15 | Liubo Zhang, China CDC’s Chief Expert of Disinfection显示文摘Liubo Zhang is the Chief Expert of Disinfection of China CDC and has been devoted to public health and preventive medicine since graduating from Wuhan Medical College in 1983.Over the past 37 years,he has been engaged in many fields such as epidemic control,infectious disease prevention and control,and disinfection and hospital infection control.Especially in the past 20 years,he has made outstanding contributions to these fields.Zhang has participated in the prevention and control of major infectious diseases such as the severe acute respiratory syndrome(SARS)epidemic and laboratory infections,human infection with highly pathogenic avian influenza,hand-foot-mouth disease,influenza A(H1N1),coronavirus disease 2019(COVID-19),etc.He was responsible for the development of disinfection technical guidelines and on-site guidance for these diseases. | Peter Hao Yu Chen Zhenjun Li Jingjing Xi Feng Tan | 2020 | China CDC weekly2020，2，36： | 0 |
| 16 | Guizhen Wu, China CDC’s Chief Expert of Biosafety显示文摘Guizhen Wu,China CDC’s Chief Expert of Biosafety,has been working for nearly four decades in the field of public health emergencies and laboratory biosafety.Wu is the major planner and promoter of the laboratory biosafety management system in China.In 2018 as the Chairwoman,Wu hosted the 13th Asia-Pacific Biosafety Association(A-PBA)Biosafety Conference held in Beijing,which was the first international biosafety conference held in China.She was elected as the President of A-PBA on September 19,2019. | Peter Hao Yu Chen Zhenjun Li Jingjing Xi Feng Tan | 2020 | China CDC weekly2020，2，37： | 0 |
| 17 | Xu Su,China CDC’s Chief Expert of Radiation Protection显示文摘Xu Su is the major leader of radiation protection in China and has been honored and awarded several times,has published more than 280 research papers,and has been the Director of the National Institute for Radiological Protection(NIRP)of China CDC and the Professor and Executive Director of the Chinese Center for Medical Response to Radiation Emergency from 2002 to 2017. | Peter Hao Yu Chen Zhenjun Li Jingjing Xi Feng Tan | 2020 | China CDC weekly2020，2，29： | 0 |
| 18 | Chengye Sun,China CDC’s Chief Expert of Poison Control显示文摘In July 1985,Chengye Sun graduated from Henan Medical University and became a physician in a hospital.In 1988,he entered the Chinese Academy of Preventive Medical Sciences for postgraduate studies on occupational medicine,which helped him become a public health professional.The shift from being a clinician to a public health worker helped him realize how external factors could act as strong drivers on human health. | Yu Chen Peter Hao Nankun Liu Zhenjun Li Jingjing Xi Feng Tan | 2021 | China CDC weekly2021，3，18： | 0 |
| 19 | Weiping Wu,China CDC’s Chief Expert in Parasitic Disease Control显示文摘Weiping Wu is a leading expert in parasitic diseases and leads more than ten key projects that focus on important parasitic diseases including schistosomiasis,filariasis,leishmaniasis,and echinococcosis.Over his career,he’s achieved several milestone results including the spatial aggregation of the distribution of leishmaniasis cases and related livestock after 15 years of study in the desert area of Xinjiang Uyghur Autonomous Region,almost 40 publications in SCI journals as the first or corresponding author,and significant contributions to several key documents including the“Action plan for the control of echinococcosis in China”in 1995,“Diagnosis for echinococcosis,”and“Echinococcosis control,”all of which have helped standardize prevention and control practices for effective echinococcosis management. | Peter Hao Yu Chen Zhenjun Li Jingjing Xi Feng Tan | 2020 | China CDC weekly2020，2，33： | 0 |
| 20 | Linhong Wang,China CDC’s Chief Expert of Chronic and Non-Communicable Disease Control显示文摘Linhong Wang is the Chief Expert of Chronic and Non-Communicable Disease(NCD)Control of China CDC and is a professional with over 30 years of experience in clinical and preventive medical science.Her specialties and professions span multiple fields with extraordinary contributions to public health.Wang graduated from Beijing Medical University in 1983 with her first job out of university as an obstetrician and gynecologist in the Affiliated Hospital of the University. | Peter Hao Yu Chen Zhenjun Li Jingjing Xi Feng Tan | 2020 | China CDC weekly2020，2，35： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员