维普中文期刊产品整合服务
85篇 您的检索式:作者名="Wenjin ZHANG"
    题名 作者 年代 出处 被引量
1The development of China's Yangtze River Economic Belt:how to make it in a green way?显示文摘The Yangtze River is one of the largest and longest rivers in Asia.The river originates in the Tibet-Qinghai Plateau(headwater reach),passes through the mountainous provinces of Sichuan,Yunnan and Chongqing(upper reach),flows into the Central Plain(middle reach)and Lower Plain(lower reach),and finally empties into the East China Sea in Shanghai(estuary).The Yangtze River Economic Belt(YREB;Fig.1)has a surface area of 2.1Yushun Chen Shuanghu Zhang Desheng Huang Bai-Lian Li Junguo Liu Wenjin Liu Jing Ma Fang Wang Yong Wang Shengjun Wu Yegang Wu Jinyue Yan Chuanbo Guo Wei Xin Hao Wang 2017Science Bulletin2017,62,9:20
2Seismogenic Structure around the Epicenter of the May 12,2008 Wenchuan Earthquake from Micro-seismic Tomography显示文摘一个三维的本地规模的 P 速度模型在下面到 25 km,在主要吃惊震中区域附近的深度用从 5856 余震的地震光线由一个最新部署的暂时的地震网络记录了的 83821 event-to-receiver 被构造。棋盘测试证明我们的 tomographic 模型有 ∼2 km 的侧面、垂直的分辨率。高分辨率的 P 速度模型在 seismogenic 层揭示了有趣的结构:(1 ) Guanxian-Anxian 差错, Yingxiu-Beichuan 差错和 Longmen 掸人差错地区的 Wenchuan-Maoxian 差错好由突然地上面的外壳的速度变化描出;(2 ) Pengguan 山岳比它的包围区域有通常更高的速度,并且可以延长在下面到从表面的至少 ∼10 km;(3 ) 在 Wenchuan-Maoxian 差错下面的一个突然地侧面的速度变化可以显示 Pengguan 山岳的西方的边界或 Wenchuan-Maoxian 差错是垂直的,并且 Wenchuan 地震的低亚硫酸钠中心可能在蘸 Yingxiu-Beichuan 和 Guanxian-Anxian 差错,和垂直 Wenchuan-Maoxian 差错的 NW 的连词点定位;(4 ) 沿着 Yingxiu-Beichuan 差错的附近被很低的速度和低 seismicity 在浅深度描绘,可能由于孔和破裂的高内容;(5 ) 二块低速度的异例分别地与 ∼5 km 与 ∼7 km 偏移量在挂的墙和 Guanxian-Anxian 差错的脚墙中被想象垂直部件。AN Meijian FENG Mei DONG Shuwen LONG Changxing ZHAO Yue YANG Nong ZHAO Wenjin ZHANG Jizhong 2009Acta Geologica Sinica(English Edition)2009,83,4:7
3Anisotropic optical and electronic properties of two- dimensional layered germanium sulfide显示文摘二维(2D ) 分层的材料,转变金属 dichalcogenides,和黑磷从基本物理和设备应用的观点吸引了可观的兴趣。在各向异性的分层的 2D 材料的新功能的建立是挑战性却令人满意的边疆,由于为新设备的这些材料和他们的前景的显著光性质。此处,我们报导各向异性并且厚度依赖者 2D 的光性质金者硫化物(GeS ) 的分层的 monochalcogenide。相应于 B 3g, 的三座散布 Raman 山峰 g 1 ,和 有强壮的极化依赖的 g 2 模式在 GeS 薄片被表明,它为识别各向异性的分层的 GeS 的水晶取向作为一个有效方法验证极化的拉曼光谱学。光致发光(PL ) 在 ~ 与一座山峰被观察在房间温度在 GeS 从直接光的转变发源的 1.66 eV。PL 的极化依赖者特征,第一次被揭示,在 GeS 的乐队边附近显示明显的各向异性的光转变,它被密度支持功能的理论计算。显著地,厚度依赖者 PL 被观察并且讨论。这各向异性的分层的 GeS 为新物理现象和愿望的发现介绍机会发现利用它的各向异性的性质的应用,例如极化敏感的光电探测器。Dezhi Tan Hong En Lim Feijiu Wang Nur Baizura Mohamed Shinichiro Mouri Wenjin Zhang Yuhei Miyauchi Mari Ohfuchi Kazunari Matsuda 2017Nano Research2017,10,2:7
4Dynamic Hand Gesture Recognition Based on Short-Term Sampling Neural Networks显示文摘Hand gestures are a natural way for human-robot interaction.Vision based dynamic hand gesture recognition has become a hot research topic due to its various applications.This paper presents a novel deep learning network for hand gesture recognition.The network integrates several well-proved modules together to learn both short-term and long-term features from video inputs and meanwhile avoid intensive computation.To learn short-term features,each video input is segmented into a fixed number of frame groups.A frame is randomly selected from each group and represented as an RGB image as well as an optical flow snapshot.These two entities are fused and fed into a convolutional neural network(Conv Net)for feature extraction.The Conv Nets for all groups share parameters.To learn longterm features,outputs from all Conv Nets are fed into a long short-term memory(LSTM)network,by which a final classification result is predicted.The new model has been tested with two popular hand gesture datasets,namely the Jester dataset and Nvidia dataset.Comparing with other models,our model produced very competitive results.The robustness of the new model has also been proved with an augmented dataset with enhanced diversity of hand gestures.Wenjin Zhang Jiacun Wang Fangping Lan 2021IEEE/CAA Journal of Automatica Sinica2021,8,1:5
5A case study of regional eco-hydrological characteristics in the Tao River Basin, northwestern China, based on evapotranspiration estimated by a coupled Budyko Equation-crop coefficient approach显示文摘In a case study in Tao River Basin, China, we derived a high spatial-resolution regional distribution of evapotranspiration(ET) using the single crop coefficient method and Budyko equation. We then further analyzed the spatio-temporal characteristics of this diverse eco-hydrological basin from 2001–2010. The results suggest that the single crop coefficient method based on leaf area index captures better spatial and temporal dynamics of the regional ET than did the Budyko Equation method. The rising temperature was the main reason for the increasing ET in the Tao River Basin during 2001–2010. Areas with high ET efficiency were distributed mainly in the areas where the vegetation coverage was high, and a lower runoff coefficient responded. The estimated spatial patterns of ET allowed an improved understanding of the eco-hydrological processes within the Tao River Basin and the method used might be generalized as a reference for future regional-scale eco-hydrological research.LI ChangBin ZHANG XueLei QI JiaGuo WANG ShuaiBing YANG LinShan YANG WenJin ZHU GaoFeng HAO Qiang 2015Science China Earth Sciences2015,58,11:5
6Baeyer–Villiger oxidation of cyclohexanone catalyzed by cordierite honeycomb washcoated with Mg–Sn–W composite oxides显示文摘In this work, a series of Mg–Sn–W oxide powder catalysts with different tungsten oxide contents(0, 15 wt% and 30 wt%) were prepared and washcoated on cordierite honeycomb monoliths to produce monolithic catalysts,which were tested for the Baeyer–Villiger oxidation of cyclohexanone. The obtained monolithic catalysts,which combined the advantages of both homogeneous and heterogeneous catalysts, showed high catalytic efficiency and overcame the problems of product separation that occurred in the homogeneous catalytic process.SEM and EDX tests showed that the catalytic coating, with a thickness of approximately 20 μm, was compact and homogeneous, and an enlarged BET surface area was indicated by N_2 adsorption–desorption compared with the bare cordierite honeycomb. The chemical properties on the catalytic surface of the powder and monolithic catalysts were characterized by XPS, which indicated the tin and tungsten on the catalysts exhibited their full oxide states and presented mainly as stannate and tungstate, as confirmed by XRD and FTIR characterizations.Moreover, the catalytic activity test indicated that the tungsten content of the catalysts played an important role in catalytic efficiency and that monolithic catalysts were produced without obvious catalytic activity loss compared with the corresponding powders.(M)W30, which exhibited excellent mechanical stability and maintained high activity after recycling three times, was the optimal catalyst, showing a high selectivity that exceeded 86%and a conversion above 64%. Therefore, the structured Mg–Sn–W oxide catalysts have great potential for application in practical production.Yang Han Shengnan Li Rong Ding Wenjin Xu Guangxu Zhang 2019Chinese Journal of Chemical Engineering2019,27,3:4
7Involvement of Th17 and Th1 Effector Responses in Patients with Hepatitis B显示文摘Yufu Ye Xiaojun Xie Jiwei Yu Lin Zhou Haiyang Xie Guoping Jiang Xiaobo Yu Wenjin Zhang Jian Wu Shusen Zheng 2010Journal of Clinical Immunology2010,,4:3
8Ni-based superalloy surface alloying by double-glow plasma surface alloying technique显示文摘Xu Jiang Xu Zhang Xishan Xie Zhong Xu Wenjin Liu 2003Vacuum2003,,4:2
9Therapeutic efficacy of traditional Chinese exercises and massage treatment on lumbar instability:a randomized controlled trial显示文摘OBJECTIVE:To determine the effect of traditional Chinese exercises combined with traditional Chinese massage on lumbar instability.METHODS:Seventy patients with lumbar instability were randomly divided into experimental group and control group.The experimental group was treated with traditional Chinese exercises combined with traditional Chinese massage,while the control group was only treated with traditional Chinese exercises.The Japanese Orthopaedic Association(JOA)scores,Oswestry Disability Index(ODI)and dynamic imaging indexes were used to assess treatment outcomes.RESULTS:After 8 weeks of treatment,the JOA scores of both groups were significantly higher than those before treatment(P<0.05),while ODI was significantly lower(P<0.05).In addition,compared with the control group,the JOA score of the experimental group was significantly increased(P<0.05),and the ODI was significantly decreased(P<0.05).Besides,the dynamic imaging indexes of patients with lumbar instability significantly changed after treatment.The lumbar vertebral laxity was significantly decreased(P<0.05)than those before treatment.CONCLUSION:The traditional Chinese exercises and massage may improve the symptoms of lumbar instability,and traditional Chinese exercises combined with massage treatment may be better than exercises alone.Chen Wenjin Wang Jianwei Zhou Zhiyi Ren Yide Hua Zhen Yan Zheng Zhang Yafeng 2020Journal of Traditional Chinese Medicine2020,40,6:2
10Differential Privacy Preserving Dynamic Data Release Scheme Based on Jensen-Shannon Divergence显示文摘Health monitoring data or the data about infectious diseases such as COVID-19 may need to be constantly updated and dynamically released,but they may contain user's sensitive information.Thus,how to preserve the user's privacy before their release is critically important yet challenging.Differential Privacy(DP)is well-known to provide effective privacy protection,and thus the dynamic DP preserving data release was designed to publish a histogram to meet DP guarantee.Unfortunately,this scheme may result in high cumulative errors and lower the data availability.To address this problem,in this paper,we apply Jensen-Shannon(JS)divergence to design the OPTICS(Ordering Points To Identify The Clustering Structure)scheme.It uses JS divergence to measure the difference between the updated data set at the current release time and private data set at the previous release time.By comparing the difference with a threshold,only when the difference is greater than the threshold,can we apply OPTICS to publish DP protected data sets.Our experimental results show that the absolute errors and average relative errors are significantly lower than those existing works.Ying Cai Yu Zhang Jingjing Qu Wenjin Li 2022China Communications2022,19,6:2
11Temperature-induced liquid state change and its effects on solidification of thermoelectric alloy Bi_(0.3)Sb_(1.7)Te_3显示文摘The behaviors of electrical resistivity vs temperature(ρ-T) of the molten p-type thermoelectric alloy Bi0.3Sb1.7Te3(at.%) were explored in heating and cooling processes. An obvious hump appeared on the ρ-T curve from 932 ℃ to 1,020 ℃ at the heating process, while the curve became smooth in the following cooling, which suggests an irreversible temperature-induced liquid-liquid structure transition(TI-LLST) occurred in the liquid alloy. Based on this judgment, solidification experiments were carried out to find out the effects of the different liquid states. It was verified that, for the melt experiencing the presumed TI-LLST, both the nucleation and growth undercooling degrees were elevated and the solidification time was remarkably prolonged. On the other hand, the configuration of Bi0.3Sb1.7Te3 phase was refined, and its preferential orientation was weakened.Zhang Wenjin Wu Zhan Yu Yuan Zu Fangqiu 2014China Foundry2014,11,3:2
12A low dose cell therapy system for treating osteoarthritis:In vivo study and in vitro mechanistic investigations显示文摘Mesenchymal stem cells(MSCs)can be effective in alleviating the progression of osteoarthritis(OA).However,low MSC retention and survival at the injection site frequently require high doses of cells and/or repeated injections,which are not economically viable and create additional risks of complications.In this study,we produced MSC-laden microcarriers in spinner flask culture as cell delivery vehicles.These microcarriers containing a low initial dose of MSCs administered through a single injection in a rat anterior cruciate ligament(ACL)transection model of OA achieved similar reparative effects as repeated high doses of MSCs,as evaluated through imaging and histological analyses.Mechanistic investigations were conducted using a co-culture model involving human primary chondrocytes grown in monolayer,together with MSCs grown either within 3D constructs or as a monolayer.Co-culture supernatants subjected to secretome analysis showed significant decrease of inflammatory factors in the 3D group.RNA-seq of co-cultured MSCs and chondrocytes using Gene Ontology and Kyoto Encyclopedia of Genes and Genomes(KEGG)pathway analysis revealed processes relating to early chondrogenesis and increased extracellular matrix interactions in MSCs of the 3D group,as well as phenotypic maintenance in the co-cultured chondrocytes.The cell delivery platform we investigated may be effective in reducing the cell dose and injection frequency required for therapeutic applications.Bin Wang Wei Liu Jiao Jiao Li Senlin Chai Dan Xing Hongsheng Yu Yuanyuan Zhang Wenjin Yan Zhihong Xu Bin Zhao Yanan Du Qing Jiang 2022Bioactive Materials2022,7,1:2
13Predator perception of detritus and eggsac decorations spun by orb-web spiders Cyclosa octotuberculata:Do they function to camouflage the spiders?显示文摘Camouflage is one of the most widespread and powerful strategies that animals use to make detection/recognitionmore difficult. Many orb-web spiders of the genus Cyclosa add prey remains, plant debris, moults, and/or eggsacs to their webscalled web decorations. Web decorations resembling spider body colour pattern have been considered to camouflage the spiderfrom predators. While this camouflage is obvious from a human's perspective, it has rarely been investigated from a predator'sperspective. In this study, we tested the visibility of web decorations by calculating chromatic and achromatic contrasts of detritusand eggsac decorations built by Cyclosa octotuberculata, against four different backgrounds viewed by both bird (e.g., blue tits)and hymenopteran (e.g. wasps) predators. We showed that both juvenile and adult spiders on webs with detritus or egg-sac decorationswere undetectable by both hymenopteran and bird predators over short and long distances. Our results thus suggest thatdecorating webs with detritus or eggsacs by C. octotuberculata may camouflage the spiders from both hymenopteran and birdpredators in their common habitats [Current Zoology 56 (3): 379-387, 2010].Wenjin GAN Fengxiang LIU Zengtao ZHANG Daiqin LI 2010Current Zoology2010,56,3:2
14Direct detection of a single[4Fe-4S]cluster in a tungsten-containing enzyme:Electrochemical conversion of CO_(2) into formate by formate dehydrogenase显示文摘The conversion of CO_(2) into fuels and valuable chemicals is one of the central topics to combat climate change and meet the growing demand for renewable energy.Herein,we show that the formate dehydrogenase from Clostridium ljungdahlii(ClFDH)adsorbed on electrodes displays clear characteristic voltammetric signals that can be assigned to the reduction and oxidation potential of the[4Fe-4S]^(2+/+)cluster under nonturnover conditions.Upon adding substrates,the signals transform into a specific redox center that engages in catalytic electron transport.ClFDH catalyzes rapid and efficient reversible interconversion between CO_(2) and formate in the presence of substrates.The turnover frequency of electrochemical CO_(2) reduction is determined as 1210 s^(-1) at 25℃ and pH 7.0,which can be further enhanced up to 1786 s^(-1) at 50℃.The Faradaic efficiency at−0.6 V(vs.standard hydrogen electrode)is recorded as 99.3%in a 2-h reaction.Inhibition experiments and theoretical modeling disclose interesting pathways for CO_(2) entry,formate exit,and OCN−competition,suggesting an oxidation-state-dependent binding mechanism of catalysis.Our results provide a different perspective for understanding the catalytic mechanism of FDH and original insights into the design of synthetic catalysts.Wenjin Li Yanxin Gao Xuan Sun Lei Wan Haishuo Ji Hang Luo Yao Tian Hao Song Geng Wu Liyun Zhang 2023Carbon Energy2023,5,5:2
15Theory assisted design of N-doped tin oxides for enhanced electrochemical CO2 activation and reduction显示文摘Clearly understanding the structure-function relationship and rational design of efficient CO2 electrocatalysts are still the challenges.This article describes the molecular origin of high selectivity of formic acid on N-doped SnO2 nanoparticles,which obtained via thermal treatment of g-C3N4 and SnCl2·2H2O precursor.Combined with density functional theory(DFT)calculations,we discover that N-doping effectively introduces oxygen vacancies and increases the charge density of Sn sites,which plays a positive role in CO2 activation.In addition,N-doping further regulates the adsorption energy of^*OCHO,^*COOH,^*H and promotes HCOOH generation.Benefited from above modulation,the obtained N-doped SnO2 catalysts with oxygen vacancies(Ov-N-SnO2)exhibit faradaic efficiency of 93% for C1 formation,88% for HCOOH production and well-suppression of H2 evolution over a wide range of potentials.Congling Hu Lei Zhang Lulu Li Wenjin Zhu Wanyu Deng Hao Dong Zhi-Jian Zhao Jinlong Gong 2019Science China Chemistry2019,62,8:2
16Composite control of linear/ adaptive variable structure control显示文摘Gu Wenjin Zhang Yifei Li Changping 2001Chinese Journal of Astronautics2001,14,1:1
17Composite control of linear/adaptive variable structure control显示文摘Gu Wenjin Zhang Yifei Li Changping 2001Chinese Journal of Astronautics2001,14,1:1
18Micro -Machined Semi - Encapsulated Spiral Induct ors for Electro -Mechanical Systems Applications显示文摘Daniel J Sadler Wenjin Zhang Chong H Aim 1997IEEE Trans on Magnetics1997,33,5:1
19Composite Control of Linear /Adaptive Variable Structure Control 显示文摘Gu Wenjin Zhang Yifei Li Changping 2001Chinese Journal of Astronautics2001,14,1:1
20Composite Control of Linear /Adaptive Variable Structure Control 显示文摘Gu Wenjin Zhang Yifei Li Changping 2001Chinese Journal of Astronautics2001,14,1:1
返回顶部 每页显示:
共5页 首页 上一页 第1页 下一页 末页 /5 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费