|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A cellular automata evacuation model considering friction and repulsion显示文摘There exist interactions among pedestrians and between pedestrian and environment in evacuation. These interactions include attraction, repulsion and friction that play key roles in human evacuation behaviors, speed and efficiency. Most former evacuation models focus on the attraction force, while repulsion and friction are not well modeled. As a kind of multi-particle self-driven model, the social force model introduced in recent years can represent those three forces but with low simulation efficiency because it is a continuous model with complex rules. Discrete models such as the cellular automata model and the lattice gas model have simple rules and high simulation efficiency, but are not quite suitable for interactions’ simulation. In this paper, a new cellular automata model based on traditional models is introduced in which repulsion and friction are modeled quantitatively. It is indicated that the model can simulate some basic behaviors, e.g. arching and the “faster-is-slower” phenomenon, in evacuation as multi-particle self-driven models, but with high efficiency as the normal cellular automata model and the lattice gas model. | SONG Weiguo YU Yanfei FAN Weicheng Zhang Heping | 2005 | Science China(Technological Sciences)2005，48，4： | 19 |
| 2 | Adsorption of VOCs on reduced graphene oxide显示文摘A modified Hummer's method was adopted for the synthesis of graphene oxide(GO) and reduced graphene oxide(rGO). It was revealed that the modified method is effective for the production of GO and rGO from graphite. Transmission electron microscopy(TEM) images of GO and rGO showed a sheet-like morphology. Because of the presence of oxygenated functional groups on the carbon surface, the interlayer spacing of the prepared GO was higher than that of rGO. The presence of \OH and C_O groups in the Fourier transform infrared spectra(FTIR) spectrum and G-mode and 2D-mode in Raman spectra confirmed the synthesis of GO and rGO. rGO(292.6 m^2/g) showed higher surface area than that of GO(236.4 m^2/g). The prepared rGO was used as an adsorbent for benzene and toluene(model pollutants of volatile organic compounds(VOCs)) under dynamic adsorption/desorption conditions. rGO showed higher adsorption capacity and breakthrough times than GO. The adsorption capacity of rGO for benzene and toluene was 276.4 and 304.4 mg/g, respectively.Desorption experiments showed that the spent rGO can be successfully regenerated by heating at 150.0°C. Its excellent adsorption/desorption performance for benzene and toluene makes rGO a potential adsorbent for VOC adsorption. | Lian Yu Long Wang Weicheng Xu Limin Chen Mingli Fu Junliang Wu Daiqi Ye | 2018 | Journal of Environmental Sciences2018，30，5： | 10 |
| 3 | WWP2 promotes degradation of transcription factor OCT4 in human embryonic stem cells显示文摘POU 抄写因素 OCT4 不仅在维持 pluripotent 和房间而且幕作为通过基因剂量的一个房间命运决定因素完成的胚胎的茎(ES ) 的自我更新的状态起一个必要作用。然而,控制细胞内部的 OCT4 蛋白质水平的分子的机制留下逃犯。这里,我们报导那人的 WWP2, E3 ubiquitin (Ub ) 蛋白质 ligase,通过它的 WW 领域明确地与 OCT4 交往并且在 vitro 并且在 vivo 提高 OCT4 的 Ub 修正。我们首先证明在人的 ES 房间的内长的 OCT4 能被 Ub post-translationally 修改。而且,我们发现 WWP2 以一种剂量依赖者方式,和 WWP2 的活跃地点半胱氨酸残余通过 26S proteasome 支持了 OCT4 的降级在 OCT4 上为它的酶的活动和解朊的效果被要求。显著地,我们当 WWP2 表示是由特定的 RNA 干扰(RNAi ) 的 downregulated 时,内长的 OCT4 蛋白质水平显著地被提高的数据表演,建议那 WWP2 是为在人的 ES 房间维持合适的 OCT4 蛋白质水平的一个重要管理者。而且,北污点分析证明 WWP2 抄本在多样的人的织物 / 器官是广泛地在场的并且高度在无差别的人的 ES 房间表示了。然而,它的表示水平快速在区分的人的 ES 房间以后被减少,显示 WWP2 表示力量发展地被调整。我们的调查结果证明 WWP2 是在人的 ES 房间的 OCT4 蛋白质水平的一个重要管理者。 | Huiming Xu Weicheng Wang Chunliang Li Hongyao Yu Acong Yang Beibei Wang Ying Jin | 2009 | Cell Research2009，19，5： | 8 |
| 4 | Photonic cavity enhanced high-performance surface plasmon resonance biosensor显示文摘Herein we propose a novel strategy to enhance surface plasmon resonance(SPR)by introducing a photonic cavity into a total-internal-reflection architecture.The photonic cavity,which is comprised of a highly reflective photonic crystal(PC),defect layers,and a gold(Au)film,enables Fabry–Perot(FP)resonances in the defect layers and therefore narrows the SPR resonance width in the metallic surface as well as increases the electric field intensity and penetration depth in the evanescent region.The fabricated sensor exhibits a 5.7-fold increase in the figure of merit and a higher linear coefficient as compared with the conventional Au-SPR sensor.The demonstrated PC/FP cavity/metal structure presents a new design philosophy for SPR performance enhancement. | GUI-SHI LIU XIN XIONG SHIQI HU WEICHENG SHI YAOFEI CHEN WENGUO ZHU HUADAN ZHENG JIANHUI YU NUR HIDAYAH AZEMAN YUNHAN LUO ZHE CHEN | 2020 | Photonics Research2020，8，4： | 4 |
| 5 | PULSED Nd-YAG LASER WELDING OF AN AI-SiC_p METAL MATRIX COMPOSITE显示文摘A study is presented of the laser welding behaviour of an SiC particulate re-inforced Al-alloy comPOsite using a pulsed Nd-YAG laser. The influences of laser weldingparameters of laser intensity, pulse duration and the beamjs focus position on the depth ofweld penetration as well as the size of weld bead width were investigated. A typical mi-crostructure of a weld section reveals that the three distinct zones are present. Cracks andporosity were fOund to be two major defects in laser welded metal matrix composites(MMC). These investigations have led to an optimum welding condition proposed forlaser welding of SiC partiulate reinforced aluminium alloy comPosites with minimum de-fects. | Xu Jiukua Jiang Chengyu(Mechanical Engineering Institute, Nanjing University of Aeronauticsand Astronautics, Nanjing, 210016, China)Yu Damin Liu Weicheng(Department of Manufacturing Engineering, Hong Kong Polytechnic University) | 1997 | Chinese Journal of Aeronautics1997，10，1： | 2 |
| 6 | WWP2 promotes degradation of transcription factor OCT4 in human embryonic stem cells显示文摘 | Huiming Xu Weicheng Wang Chunliang Li Hongyao Yu Acong Yang Beibei Wang Ying Jin | 2009 | Cell Research2009，19，6： | 1 |
| 7 | The co-administrating of recombinant porcine IL-2 could enhance protective immune responses to PRV inactivated vaccine in pigs显示文摘 | Yan Lin He Qigai Yu Xiaolan Bei Weicheng Chen Huanchun | 2005 | Vaccine2005，，35： | 1 |
| 8 | A binary differentialevolution algorithm learning from explored solutions 显示文摘 | Chen Yu Xie Weicheng Zou Xiufen | 2015 | Neurocomputing2015，149，： | 1 |
| 9 | Diversity-maintaineddifferential evolution embedded with gradient-based localsearch 显示文摘 | Xie Weicheng Yu Wei Zou Xiufen | 2013 | Soft Comput2013，17，8： | 1 |
| 10 | Sudden cardiac arrest in a patient with epilepsy induced by chronic inflammation on the cerebral surface显示文摘The present study analyzed a patient with epilepsy due to chronic inflammation on the cerebral surface underwent sudden cardiac arrest. Paradoxical brain discharge, which occurred prior to ep-ileptic seizures, induced a sudden cardiac arrest. However, when the focal brain pressure was re-lieved, cardiac arrest disappeared. A 27-year-old male patient underwent pre-surgical vid-eo-electroencephalogram monitoring for 160 hours. During monitoring, secondary tonic-clonic sei-zures occurred five times. A burst of paradoxical brain discharges occurred at 2-19 seconds (mean 8 seconds) prior to epileptic seizures. After 2-3 seconds, sudden cardiac arrest occurred and lasted for 12-22 seconds (average 16 seconds). The heart rate subsequently returned to a normal rate. Results revealed arachnoid pachymenia and adhesions, as well as mucus on the focal cerebral surface, combined with poor circulation and increased pressure. Intracranial electrodes were placed using surgical methods. Following removal of the arachnoid adhesions and mucus on the local ce-rebral surface, paradoxical brain discharge and epileptic seizures occurred three times, but sudden cardiac arrest was not recorded during 150-hour monitoring. Post-surgical histological examination indicated meningitis. Experimental findings suggested that paradoxical brain discharge led to car-diac arrest instead of epileptic seizures; the insult was associated with chronic inflammation on the cerebral surface, which subsequently led to hypertension and poor blood circulation in focal cerebral areas. | Yuxi Liu Weicheng Hao Xiaoming Yang Yimin Wang Yu Su | 2012 | Neural Regeneration Research2012，7，6： | 0 |
| 11 | The clinical implication of gamma-glutamyl transpeptidase in COVID-19显示文摘Background and aim:Coronavirus disease 2019(COVID-19)is a life-threatening disease that predomi-nantly causes respiratory failure.The impact of COVID-19 on other organs remains elusive.Herein,we aimed to investigate the effects of COVID-19 on the hepatobiliary system.Methods:In the current study,we obtained the clinical records and laboratory results from 66 laboratory-confirmed patients with COVID-19 at the Wuhan Tongji Hospital between 10 February 2020 and 28 February 2020.The detailed clinical features and laboratory findings were collected for analysis.Bioinformatics analysis was conducted to evaluate the correlation between gamma-glutamyl transferase(GGT)and severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)entry receptor angiotensin-converting enzyme 2(ACE2).Results:In this cohort,30(51.7%)patients had abnormal liver function on admission,which was asso-ciated with disease severity and enriched in the male and diabetic patients.The elevated levels of direct bilirubin(P¼0.029)and GGT(P¼0.004)were common in patients with severe pneumonia when compared with those with mild pneumonia.In addition,elevated levels of GGT(P¼0.003)and aspartate aminotransferase(AST)(P¼0.007)were positively associated with longer hospital stay.The expression of ACE2 was closely associated with GGT in various human tissues because they shared the common transcriptional regulator hepatic nuclear factor-1 b(HNF1B).Conclusions:Increased GGT levels were common in severe cases and elevated GGT levels were positively associated with prolonged hospital stay and disease severity.Due to the consistent expression with ACE2,GGT is a potent biomarker indicating the susceptibility of SARS-CoV-2 infection. | Jianrong Liu Chao Yu Qing Yang Xiaofeng Yuan Fan Yang Panlong Li Guihua Chen Weicheng Liang Yang Yang | 2021 | Liver Research2021，5，4： | 0 |
| 12 | Facile construction of honeycomb-shaped porous carbon electrode materials using recyclable sodium chloride template for efficient lithium storage显示文摘Carbon materials are the preferred anode materials for Li-ion batteries.Here,we propose an easy and sustainable strategy to prepare honeycomb-shaped porous carbon(HPC)electrode materials through a process involving simple calcination and subsequent water washing by using polyvinyl-pyrrolidone(PVP)as carbon source and NaCl as pore-forming agent.A controllable cavity size and distribution of the carbon materials can be readily obtained solely by adjusting the NaCl amount.Results showed that the optimized HPC sample had a relatively uniform cavity distribution and a highly porous structure.Moreover,the special honeycomb-shaped structure was conducive to the electronic conductivity of the electrode materials,provided a short path for Li-ion transport and a wide interface with the electrolyte,and buffered the volume change of active materials.The special honeycomb-shaped structure was also maintained well after long cycles,which improved electrode stability.When used as anode materials for Li-ion batteries(LIBs),the sample demonstrated excellent cycling stability and rate performance,with a high specific capacity of 230 mA hg^-1 and a reversible capacity of 197 mA hg^-1,after 1200 cycles at 2 C.Overall,we introduced a simple strategy for the potential mass production of porous carbon materials for LIBs. | FANG ShiQing HE HaoXuan YU YingHui LI Xiao XIE WeiCheng LI Wei JIN LuQiao YANG ZhenYu CAI JianXin | 2020 | Science China(Technological Sciences)2020，63，10： | 0 |
| 13 | Corrigendum to ‘Adsorption of VOCs on reduced graphene oxide’ [J. Environ. Sci. 67 (2018) 171-178]显示文摘The authors regret“In the whole text,ppm and mg/L was confusing.As in aqueous phase,1 ppm=1 mg/L,but in gaseous phase,1 ppm=0.001%o.In this paper,in text and figures,the concentration units were ppm,but when calculating the adsorption ca-pacity,the concentration units ppm were mistakenly used as mg/L.As for benzene,1 ppm=3.4871 x 10^-3 mg/L,as for toluene。 | Lian Yu Long Wang Weicheng Xu Limin Chen Mingli Fu Junliang Wu Daiqi Ye | 2020 | Journal of Environmental Sciences2020，32，4： | 0 |
| 14 | FATIGUE BEHAVIOUR OF SiC_p/6061Al COMPOSITE显示文摘The fatigue of SiCp/6061Al composite containing 15 v.-% SiC particles has been comparedwith 6061Al alloy.Dislocation structure and microprocess of fatigue crack initiation andpropagation in the composite have been investigated by using SEM and TEM.The results in-dicate that the fatigue strength at 107 cycles of the composite is 196 MPa,i.e.about 25%higher than matrix alloy.The voids and microcracks initiated at and near the interface be-tween SiCp and matrix,where has a higher density of dislocations,will propagate and link upto form the fatigue crack.It is an important evidence to note that the dislocation channelswhere screw dislocation can travel are formed near interface and corner region of SiCo in thecomposite subjected to fatigue stress(σmax=274 MPa N=2.4×105 cycles),demonstratingthe relationship between fatigue crack initiation and dislocation movement in the SiC particlesreinforced 6061 Al alloy composite. | YU Weicheng YUAN Jincai WANG Zhongguang Laboratory of Fatigue and Fracture for Materials,Institute of Metal Research,Academia Sinica,Shenyang,China. | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，9： | 0 |
| 15 | Effect of Mixed Oxide Support for Ni/ZnO in Reactive Adsorption Desulfurization显示文摘The effect of mixed oxide support on the performance of Ni/ZnO in the reactive adsorption desulfurization(RADS) reaction was investigated in a fixed bed reactor by using thiophene as the sulfur-containing compound in the model gasoline. A series of oxide supports for Ni/ZnO were synthesized by the co-precipitation method and characterized by XRD, N_2-adsorption, TPR and NH_3-TPD techniques. It was found that the desulfurization capacity of Ni/ZnO was enhanced greatly when active components were supported on the proper mixed oxide. Ni/ZnO supported on oxides exhibited much higher desulfurization efficiency and sulfur adsorption capacity than the unsupported Ni/ZnO and the synthesized Ni/ZnO-SA adsorbent exhibited the highest efficiency for thiophene removal. The higher desulfurization activity and sulfur capacity of Ni/ZnO supported on SiO_2-Al_2O_3 with small particle size, high specific surface area and large pore volume could promote the high dispersion of active metal phase and the transfer of sulfur to ZnO with lower mass transfer resistance. γ-Al_2O_3 species could weaken the interaction of active phases and SiO_2 as well as could increase greatly the amount of weak acids. Therefore, these oxides could impose a great influence on the structure and chemical properties of the catalyst. | Chen Weicheng Yu Xiaoling Huang Huan Shi Li Meng Xuan | 2016 | China Petroleum Processing & Petrochemical Technology2016，18，4： | 0 |
| 16 | 克隆整合影响严重光胁迫下第一分株世代的生长和沉积物特征但不影响后续分株世代的生长和沉积物特征显示文摘克隆整合通过缓冲环境压力和提高资源获取效率使克隆植物受益。然而,在一个克隆系统中,受益于克隆整合的连接分株世代的数量很少受到关注。我们进行了一个盆栽实验来评估沉水植物苦草(Vallisneria natans)克隆系统内的生理整合程度,该克隆系统由一个母株和3个依次连接的后代分株组成。母株生长在正常光照下,而后代分株被严重遮荫。母株与后代分株间的匍匐茎被切断或保持连接,但3个后代分株之间的连接仍然存在。与遮荫的后代分株连接时,苦草未遮荫的母株的光合能力显著增强,但其生物量积累大大减少。克隆整合显著增加了第一分株世代(相邻分株)的生物量积累和土壤的碳氮可用性、胞外酶活性和微生物生物量,但没有增加后续分株世代的这些特征。我们的结果表明,在严重光胁迫下,来自苦草母株的支持可能仅限于克隆系统中相邻的后代分株,这暗示着一个分株世代的效应。我们的结果有助于更好地理解克隆植物的层次结构和分段化。这些发现表明克隆整合程度在分株种群的生态相互作用中起着至关重要的作用。 | Xiaowen Ma Yang Li Weicheng Yu Junnan Wang Chunhua Liu | 2022 | Journal of Plant Ecology2022，15，5： | 0 |
| 17 | IMPROVEMENT IN FATIGUE LIFETIME OF Ti-6Al-4V ALLOY BY CARBON IMPLANTATION显示文摘Carbon ions with a dose of 3×1017 ions/cm2 was implanted into Ti-6Al-4V alloy at anenergy of 80 keV.A 28% increase in edurance limit was found with implantation understress-controlled fatigue tests(R=O).The surface microstructure changes induced by ionimplantation were identified using transmission electron microscopy(TEM).The feature ofthe fracture surface were observed on scanning electron microscope(SEM).The distributionprofile of the implanted ions was measured by secondary ion mass spectroscopy(SIMS).Theimplanted surface layers contain a high density of irradiation defects and fine TiCprecipitates.Subsurface crack origins were found in specimens either with or withoutimplantation.The implanted species diffuse into matrix metal under the action of cyclic load-ing.A possible reason and mechanism for improving fatigue lifetime are also discussed. | ZHANG Dawei YU Weicheng WANG Zhongguang National Laboratory for Fatigue and Fracture of Materials,Institute of Metal Research,Academia Sinica,Shenyang,China Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang,110015 | 1991 | Acta Metallurgica Sinica(English Letters)1991，4，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员