维普中文期刊产品整合服务
115篇 您的检索式:作者名="Weixian"
    题名 作者 年代 出处 被引量
1Monodisperse core-shell structured magnetic mesoporous aluminosilicate nanospheres with large dendritic mesochannels显示文摘合理设计和有一个定制的活跃核心和大、树枝状的、修改 mesoporous 的多功能的混合 nanostructures 的精确合成组织了壳能支持催化作用,精力存储,和生物应用。这里,油水双相层化涂层策略被开发了准备 monodisperse 磁性的树枝状的 mesoporous 硅石核心壳结构化的 nanospheres。这些复杂 Fe 3 O 4@SiO2@dendritic-mSiO2 nanospheres 特征大树枝状的开的毛孔(2.7 和 10.3 nm ) 。显著地,硅石壳能与未改变的孔, 14 的 Si/Al 臼齿的比率,和显著地强壮的酸的地点被变换成树枝状的 mesoporous 铝矽酸盐框架,通过一条合成以后的途径。另外,结果的磁性的树枝状的 mesoporous 铝矽酸盐 nanospheres 展览在从废水的磷酸盐移动的突出的性质和有希望的申请。Jianping Yang Dengke Shen Yong Wei Wei Li Fan Zhang Biao Kong Shaohua Zhang Wei Teng Jianwei Fan Weixian Zhang Shixue Dou Dongyuan Zhao 2015Nano Research2015,8,8:11
2Reductive dechlorination of 2,4-dichlorophenol using nanoscale Fe^0: influencing factors and possible mechanism显示文摘Nanoscale Fe0 was synthesized through a reductive method in this paper. The experiments were per-formed to investigate the reduction of 2,4-dichlorophenol (2,4-DCP) by nanoscale Fe0 under different conditions. The pathways for the reduction of 2,4-DCP by nanoscale Fe0 were discussed. Batch studies demonstrated that the mechanism includes adsorption, dechlorination and cleavage of the benzene ring. Dechlorination, which occurs after 2,4-DCP molecule is adsorbed on the interface of Fe particle, is an interfacial reaction. One or two chlorine atom can be removed from 2,4-DCP to form 2-chlorophenol, 4-chlorophenol or phenol. As the concentration of 2,4-DCP increased, the relative dechlorination ratio decreased. However, the reduced quantities of 2,4-DCP increased. Temperature can influence dechlo-rination rate and pathway. Dechlorination is prior to cleavage of the benzene ring at a higher tempera-ture, but at a lower temperature, adsorption may be the main pathway, and cleavage of the benzene ring may be prior to dechlorination.CHENG Rong WANG JianLong ZHANG WeiXian 2007Science China Chemistry2007,50,4:9
3Error Compensation of Thin Plate-shape Part with Prebending Method in Face Milling显示文摘Low weight and good toughness thin plate parts are widely used in modern industry, but its flexibility seriously impacts the machinability. Plenty of studies focus on the influence of machine tool and cutting tool on the machining errors. However, few researches focus on compensating machining errors through the fixture. In order to improve the machining accuracy of thin plate-shape part in face milling, this paper presents a novel method for compensating the surface errors by prebending the workpiece during the milling process. First, a machining error prediction model using finite element method is formulated, which simplifies the contacts between the workpiece and fixture with spring constraints. Milling forces calculated by the micro-unit cutting force model are loaded on the error prediction model to predict the machining error. The error prediction results are substituted into the given formulas to obtain the prebending clamping forces and clamping positions. Consequently, the workpiece is prebent in terms of the calculated clamping forces and positions during the face milling operation to reduce the machining error. Finally, simulation and experimental tests are carried out to validate the correctness and efficiency of the proposed error compensation method. The experimental measured flatness results show that the flatness improves by approximately 30 percent through this error compensation method. The proposed method not only predicts the machining errors in face milling thin plate-shape parts but also reduces the machining errors by taking full advantage of the workpiece prebending caused by fixture, meanwhile, it provides a novel idea and theoretical basis for reducing milling errors and improving the milling accuracy.YI Wei JIANG Zhaoliang SHAO Weixian HAN Xiangcheng LIU Wenping 2015Chinese Journal of Mechanical Engineering2015,28,1:9
4Electrochemical measurements used for assessment of corrosion and protection of metallic materials in the field:A critical review显示文摘Corrosion degradation is detrimental to metal structures as it shortens their lifetime and leads to huge economic losses and unexpected disasters.Therefore,the detection and monitoring of corrosion degradation is of great importance.Herein,we briefly review the state-of-the-art electrochemical methods,instrumentation(based on virtual instrumentation),and advanced sensor/probes that are used in the field for the assessment of corrosion damage.Typical corrosion monitoring results,some of which have been obtained at Tianjin University in the past 30 years,for metallic materials and organic coating/metal systems in atmospheric,marine,and soil conditions in the field are presented.Detection methods,data analysis,and theoretical and mathematical models regarding each corrosion system are discussed,and the challenges,problems and possible solutions for each case are suggested.Lastly,future developments,such as wireless,intelligent,and automatic electrochemical measurement,that will augment the present electrochemical methods of evaluating corrosion degradation are summarized.Da-Hai Xia Cheng-Man Deng Digby Macdonald Sina Jamali Douglas Mills Jing-Li Luo Michael G.Strebl Mehdi Amiri Weixian Jin Shizhe Song Wenbin Hu 2022Journal of Materials Science & Technology2022,,17:8
5Transformation of erythromycin during secondary effluent soil aquifer recharging:Removal contribution and degradation path显示文摘Erythromycin(ERY),a widely used antibiotic,has recently been detected in municipal secondary effluents and poses serious threats to human health during wastewater reusing.In this study,the removal,fate,and degradation pathway of ERY in secondary effluent during soil aquifer treatment was evaluated via laboratory-scale SAT tests.Up to a 92.9%reduction of ERY in synthetic secondary effluent was observed in 1.0 m depth column system,which decreased to 64.7%when recharged with wastewater treatment plant secondary effluent.XRD-fractionation results demonstrated that the transphilic acid and hydrophobic acid fractions in secondary effluent compete for the adsorption sites of the packed soil and lead to a declined ERY removal.Moreover,aerobic biodegradation was the predominant role for ERY removal,contributing more than 60%reduction of ERY when recharged with synthetic secondary effluent.Destruction of 14-member macrocyclic lactone ring and breakdown of two cyclic sugars(L-cladinose and D-desosamine) were main removal pathways for ERY degradation,and produced six new intermediates.Liangliang Wei Kena Qin Ningbo Zhao Daniel R.Noguera Wei Qiu Qingliang Zhao Xiangjuan Kong Weixian Zhang Felix Tetteh Kabutey 2017Journal of Environmental Sciences2017,29,1:4
6Identification of diseases for soybean seeds by computer vision applying BP neural network显示文摘The use of computer vision for estimating quality in agriculture products has become wide spread in recent years and the composition,variety,or ripeness can be estimated.On the other hand,the appearance is one of the most worrying issues for producers due to its influence on quality.In this research,computer vision technology combined with BP artificial neural network(ANN)was developed to identify soybean frogeye,mildewed soybean,worm-eaten soybean and damaged soybean.Thirty-nine characteristic parameters from color,texture and shape characteristics were computed after preprocessing the acquired soybean images.The dimensionality of the characteristic parameters was reduced from 39 dimensionalities to 12 dimensionalities using the method of principal component analysis(PCA).MALAB software was used to build a prediction model according to 12 characteristic parameters.The identification accuracies of soybean frogeye,mildewed soybean,damaged soybean and worm-eaten soybean are 96%,95%,92%,and 92%,respectively.And the accuracy for heterogeneous soybean seeds with several diseases is 90%.The results show that the prediction model constructed by BP neural network can identify the diseases of soybean seeds.And it is useful to estimate appearance quality of soybean by computer vision applying BP neural network.Tan Kezhu Chai Yuhua Song Weixian Cao Xiaoda 2014International Journal of Agricultural and Biological Engineering2014,7,3:4
7CO2 emission driving forces and corresponding mitigation strategies under low-carbon economy mode:evidence from China's Beijing-Tianjin-Hebei region显示文摘On account of the background of China's 'new normal' characterized by slower economic growth, this paper analyses the low-carbon economy status quo in the Beijing-Tianjin-Hebei region and empirically investigates the relationship between carbon dioxide(CO_2) emissions and its various factors for China's Beijing-Tianjin-Hebei region using panel data econometric technique. We find evidence of existence of Environmental Kuznets Curve. Results also show that economic scale, industrial structure, and urbanization rate are crucial factors to promote CO_2emissions. However, technological progress, especially the domestic independent research and development, plays a key role in C0_2 emissions abatement. Next, we further analyze the correlation between each subregion and various factors according to Grey Relation Analysis. Thereby,our findings provide important implications for policymakers in air pollution control and C0_2 emissions reduction for this region.Weixian Wei Peng Li Siyu Wang Jiaqi Gao 2017Chinese Journal of Population,Resources and Environment2017,15,2:3
8海产品安全性及对策探讨显示文摘人们对海产品的喜爱有增无减,但海产品所存在的各种问题却未引起人们的足够重视。文章综述了中国海产品正遭受的各种不同来源、不同种类、不同形式的污染,指出了目前中国海产品安全管理中尚存在的问题,并提出了相关的预防对策。钟思胜 贾永刚 ZHANG Weixian CAO Jasheng 2005海洋开发与管理2005,22,6:3
9Studies on MB-SAR 3D imaging algorithm using Yule-Walker method显示文摘Multibaseline synthetic aperture radar(MB-SAR) can form a synthetic aperture in the height direction with multiple parallel observations,so it has the resolving capability in the height direction and can realize three-dimensional(3D) imaging for the target.The analytic model of MB-SAR based on spectrum estimation is analyzed in this paper.Based on the more general geometric model,we derive the signal model for MB-SAR 3D imaging.And then Yule-Walker algorithm is proposed to realize MB-SAR 3D imaging meanwhile the principle is analyzed and the steps of Yule-Walker algorithm are given.This algorithm can get the 3D image of the target with high resolution using fewer observations.Finally,the experimental results of MB-SAR 3D imaging using Yule-Walker algorithm are presented,which are generated with the simulated data and the data collected in anechoic chamber.WANG Bin WANG YanPing HONG Wen TAN WeiXian WU YiRong 2010Science China(Information Sciences)2010,53,9:3
10An Empirical Analysis on the Relationship betweenExports and Economic Growth in ChinaWEI weixian(Institute of Finance, Xiamen University,Xiamen 361005, China) 1999Systems Science and Systems Engineering1999,9,1:2
11Optimizing synthesis conditions of nanoscale zero-valent iron (nZVI) through aqueous reactivity assessment显示文摘Nanoscale 铁粒子(nZVI ) 最重要的设计 nanomaterials 之一被用于环境污染控制和消退。尽管大量的合成途径被建议了,屏蔽候选人 nZVI 材料的反应的一个灵巧的方法生产了使用不同方法或在变化下面,合成条件还被建立了。在这研究,四个反应参数在减少 borohydride 的 nZVI 的准备被调整。结果的 nanoparticles 的减少的性质用二个模型独立地是 assayed 水的沾染物, Cu (II ) 和硝酸盐。结果证实 nZVI 的减少的反应对铁先锋的起始的集中很敏感, borohydride 在粒子合成期间喂率,和 borohydride 的装载比率到铁的离子。相反,答案混合速度在 nZVI 的反应上带相对小重量。二探查的反应(即, Cu (II ) 和硝酸盐减小) 能关于 nZVI 的使团正常化的表面活动产生一致、量的推理。然而,硝酸盐试金是有效的在冲淡水的答案仅仅(50 mgL 1 或更低) 由于在提高的硝酸盐集中的铁表面的加速的释放。包括 nZVI 的结构、化学的化妆的另外的卓见能从 Cu (II ) 减小评价被积累。在这研究调查的反应试金能便于候选人材料或 nZVI 生产参数的优化屏蔽,它补充一些在 nZVI 研究使用的更复杂却不太化学上特定的材料描述方法。Yanlai HAN Michael D. Y. YANG Weixian ZHANG Weile YAN 2015Frontiers of Environmental Science & Engineering2015,9,5:2
12Enhancing the Stability of Passive Film on 304 SS by Chemical Modification in Alkaline Phosphate–Molybdate Solutions显示文摘The purpose of this work was to enhance the corrosion resistance of the passive fi lm on 304 stainless steel(SS)by chemical modifi cation in alkaline phosphate–molybdate solutions.The 304 SS was passivated in both phosphate and phosphate–molybdate mixed solutions to investigate the eff ect of molybdate on its corrosion resistance.The experimental results indicated that the passive fi lm showed better corrosion resistance in Cl?-containing solutions after modifi cation in phosphate–molybdate solutions than in phosphate-only solutions.Energy-dispersive spectroscopy analyses revealed that the passive fi lm formed in phosphate–molybdate solutions contained Mo and P after modifi cation,which is the reason for the enhanced corrosion resistance.Chengcheng Pan Yang Song Weixian Jin Zhenbo Qin Shizhe Song Wenbin Hu Da-Hai Xia 2020Transactions of Tianjin University2020,26,2:2
13Towards asynchronous federated learning for heterogeneous edge-powered internet of things显示文摘The advancement of the Internet of Things(IoT)brings new opportunities for collecting real-time data and deploying machine learning models.Nonetheless,an individual IoT device may not have adequate computing resources to train and deploy an entire learning model.At the same time,transmitting continuous real-time data to a central server with high computing resource incurs enormous communication costs and raises issues in data security and privacy.Federated learning,a distributed machine learning framework,is a promising solution to train machine learning models with resource-limited devices and edge servers.Yet,the majority of existing works assume an impractically synchronous parameter update manner with homogeneous IoT nodes under stable communication connections.In this paper,we develop an asynchronous federated learning scheme to improve training efficiency for heterogeneous IoT devices under unstable communication network.Particularly,we formulate an asynchronous federated learning model and develop a lightweight node selection algorithm to carry out learning tasks effectively.The proposed algorithm iteratively selects heterogeneous IoT nodes to participate in the global learning aggregation while considering their local computing resource and communication condition.Extensive experimental results demonstrate that our proposed asynchronous federated learning scheme outperforms the state-of-the-art schemes in various settings on independent and identically distributed(i.i.d.)and non-i.i.d.data distribution.Zheyi Chen Weixian Liao Kun Hua Chao Lu Wei Yu 2021Digital Communications and Networks2021,7,3:2
14Effects of ubiquitin-protea-some pathway on mouse sperm capacitation, acrosome reaction and in vitro fertilization显示文摘Chlortetracycline (CTC) fluorescence patterns were used to study changes in the patterns B and AR of mouse sperm after incubation with reagents that would block the UPP. They were the monoclonal antibody againstubiquitinated proteins——UCPi; the polyclonal antibodyagainst ubiquitin-anti-Ub, and a special inhibitor againstproteasome——ALLN. Furthermore, we treated the capaci-tated sperm or the eggs with these reagents separately and tested whether the normal in vitro fertilization was blocked or not. Results illustrate that UCP1, anti-Ub, and ALLN have little effects on sperm capacitation and acrosome reaction, but they do inhibit fusion of mouse sperm with eggs, which suggests that UPP play an important role in mouse in vitro fertilization.WANG Hongmei SONG Changcheng DUAN Chongwen SHI Weixian LI Cunxi CHEN Dayuan WANG Yongchao 2002Chinese Science Bulletin2002,47,2:2
15MECHANISMS OF LOCALIZED NECKING DEFORMATION OF SHEET METALS显示文摘MECHANISMSOFLOCALIZEDNECKINGDEFORMATIONOFSHEETMETALS①ZhouWeixianDepartmentofAeronauticalManufacturingEnginering,NorthwesternP...Zhou, Weixian 1997中国有色金属学会会刊:英文版1997,7,2:2
16Nanoscale iron particles for environmental remedia-tion :an overview 显示文摘Zhang Weixian 2003Journal of Nanoparticle Research2003,5,34:1
17Early gene responses of trophic factor in nerve regeneration differ in experimental type 1 and type 2 diabetic polyneuropathies显示文摘 Pierson MD Weixian MD 2002Journal of Neuropathology and Experimental Neurology2002,10,:1
18Iron nanoparticles: the core-sheU structure and unique properties for Ni ( II ) sequestration 显示文摘Li Xiaoqin Zhang Weixian 2006Langmuir2006,22,10:1
19Field assessment of nanoscale bimetallic particles for groundwater treatment 显示文摘Elliott D W Zhang Weixian 2001Envi- ronmental Science & Technology2001,35,24:1
20CRISPR-based genome editing technology and its applications in oil crops显示文摘Oil crops,mainly comprised of soybean,rapeseed,groundnut,sunflower and etc.,have provided substantial edible oil and other tremendous nutrients for human beings,as well as valuable biofuels for associated industries.The genetic improvement of significant oil crops and/or domesticating novel high-yielding oil crops are in urgent need to cope with the ever-increasing demand for various oil crop products.CRISPR(Clustered Regularly Interspaced Short Palindromic Repeats)-based genome editing technology,born a few years ago,edits stretches of DNA in a targeted and RNA-dependent fashion.The Characteristics of targeted mutagenesis and easy manipulation owned by the technology make it have been applied to many plants and exhibited great potential in the genetic improvement of many important oil crops.In the face of growing need for oil crop products and the rapid developments in CRISPR-based genome editing technology,a critical review regarding the technology and its application in oil crops is badly required to provide references for the better use of this technology to modify the oil crops for higher yield.In this review paper,we briefly described the CRISPR-based genome editing technology and summarized its applications and future prospects in oil crops.Jianjie He Kai Zhang Mi Tang Weixian Zhou Liurong Chen Zhaobo Chen Maoteng Li 2021Oil Crop Science2021,6,3:1
返回顶部 每页显示:
共6页 首页 上一页 第1页 下一页 末页 /6 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