检索结果-南通市图书馆

Studies on electroless Ni-P-Cr_2O_3 and Ni-P-SiO_2 composite coatings

在线全文

学校读者我要写书评

暂无评论

电镀与涂饰 2007年第1期26卷 1-6页

作者： KARtHIKEYAN S SRINIVASAN K N vasudevan t JOHN S National Engineering College K.R.NagarKovilpatti-628503TamilnaduIndia Central Electrochemical Research Institute Karaikudi-630006India Alagappa University Karaikudi-630003India

本文对化学镀镍及化学镀镍磷基质中SiO2与Cr2O3的共沉积进行了研究。微粒在不断生长的膜层中共沉积引起了新的化学复合镀层的出现,这些复合镀层许多都具有优异的耐磨及耐蚀性能。通过选取镀层合金/复合微粒/金属基体的组分可改进镀层,... 详细信息

本文对化学镀镍及化学镀镍磷基质中SiO2与Cr2O3的共沉积进行了研究。微粒在不断生长的膜层中共沉积引起了新的化学复合镀层的出现,这些复合镀层许多都具有优异的耐磨及耐蚀性能。通过选取镀层合金/复合微粒/金属基体的组分可改进镀层,获得所需的性能,以满足特别的需求。在对这些复合镀层的应用需求正在迫近与增长的同时,其市场正在迅速扩张。本文开发出了一种合适的复合化学镀镍液,并通过维氏硬度法对化学复合镀镍层进行了表征。采用动电位极化及交流阻抗法测定了镀层的taber耐磨性能及耐蚀性能。采用SEM及XRD对复合镀层的表面形貌进行了分析。

关键词：化学镀镍化学复合镀层SiO2 Cr2O3 共沉积维氏硬度法动电位极化交流阻抗

某些有机添加剂对硫酸-酒石酸盐溶液中电沉积Cu-Zn合金的作用(英文)

在线全文

学校读者我要写书评

暂无评论

电镀与涂饰 2006年第1期25卷 1-6页

作者： K Amutha K R Marikkannu P Shakkthival t vasudevan G Paruthimal Kalaignan Dept.of Industrial Chemistry Alagappa University

研究了以酒石酸钾钠、柠檬酸三钠作为络合剂的酸性硫酸盐溶液中的Cu-Zn合金镀层。探讨了电流密度、pH、温度对镀液分散能力和镀层组成的影响。在本实验条件下,添加剂的加入可以使镀液具有较好的分散能力和较高的电流效率。实验发现,在... 详细信息

研究了以酒石酸钾钠、柠檬酸三钠作为络合剂的酸性硫酸盐溶液中的Cu-Zn合金镀层。探讨了电流密度、pH、温度对镀液分散能力和镀层组成的影响。在本实验条件下,添加剂的加入可以使镀液具有较好的分散能力和较高的电流效率。实验发现,在所研究的各种添加剂中,糖精、苯酚是加速剂,而硫脲、甘油是阻化剂。采用动电位极化和电化学阻抗谱方法,测定了Cu-Zn合金镀层在NaCl(φ=3.5%)溶液中的耐蚀性能。采用扫描电镜研究了添加剂对控制沉积质量的微妙作用。X-射线衍射分析表明,合金镀层的相结构是正交晶。在上述研究的基础上,提出了Cu-Zn合金电沉积的最佳组成和工艺控制参数。

关键词：铜锌合金电沉积有机添加剂硫酸-酒石酸盐溶液耐蚀性能

在线全文

学校读者我要写书评

暂无评论

化学镀镍的渗氢测量(英文)

电镀与涂饰 2004年第1期23卷 1-6页

作者： K.N.Srinivasan S.Karthikeyan t.vasudevan S.John Central Electrochemical Research Institute Department of Industrial chemistryAlagappa universityDepartment of Industrial chemistryAlagappa universityCentral Electrochemical Research Institute Karaikudi-630006IndiaKaraikudi-630003IndiaKaraikudi-630003IndiaKaraikudi-630006India

介绍了一种适用于化学镀镍工艺的渗氢测量方法 ,可用于监控渗氢速度 ,测定氢在金属中的扩散 ,研究氢脆 ,评估腐蚀阻化剂和酸洗中钢铁的吸氢等方面。化学镀应用中经常要使用加速剂 ,本研究的目标物质是化学镀镍的加速剂———硫脲及其衍... 详细信息

介绍了一种适用于化学镀镍工艺的渗氢测量方法 ,可用于监控渗氢速度 ,测定氢在金属中的扩散 ,研究氢脆 ,评估腐蚀阻化剂和酸洗中钢铁的吸氢等方面。化学镀应用中经常要使用加速剂 ,本研究的目标物质是化学镀镍的加速剂———硫脲及其衍生物。在这些物质存在下 ,化学镀镍过程中的渗氢行为不同。良好的加速剂可减少氢渗 ,加快金属的覆盖。

关键词：化学镀镍渗氢加速剂硫脲及其衍生物

A Hybrid Approach for Plant Disease Detection Using E-GAN and CapsNet

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第7期46卷 337-356页

作者： N.vasudevan t.Karthick Department of Data Science and Business Systems School of ComputingSRM Institute of Science and TechnologyKattankulathurTamilnadu603203India

Crop protection is a great obstacle to food safety,with crop diseases being one of the most serious *** diseases diminish the quality of crop *** detect disease spots on grape leaves,deep learning technology might be *** the other hand,the precision and efficiency of identification remain *** quantity of images of ill leaves taken from plants is often *** an uneven collection and few images,spotting disease is *** plant leaves dataset needs to be expanded to detect illness accurately.A novel hybrid technique employing segmentation,augmentation,and a capsule neural network(CapsNet)is used in this paper to tackle these *** proposed method involves three ***,a graph-based technique extracts leaf area from a plant *** second step expands the dataset using an Efficient Generative Adversarial Network ***,a CapsNet identifies the illness and *** proposed work has experimented on real-time grape leaf images which are captured using an SD1000 camera and PlantVillage grape leaf *** proposed method achieves an effective classification of accuracy for disease type and disease stages detection compared to other existing models.

关键词： Feature extraction neural network disease segmentation pattern analysis

Design and Development of an Intelligent Energy Management System for a Smart Grid to Enhance the Power Quality

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy Engineering 2023年第8期120卷 1747-1761页

作者： Nisha vasudevan vasudevan Venkatraman A.Ramkumar t.Muthukumar A.Sheela M.Vetrivel R.J.Vijaya Saraswathi F.t.Josh Department of Electrical and Electronics Engineering Kalasalingam Academy of Research and EducationTamil NaduIndia Department of Computer Science Engineering Kalasalingam Academy of Research and EducationTamil NaduIndia Department of Electrical and Electronics Engineering Kongunadu College of Engineering and TechnologyTamil NaduIndia Department of Electrical and Electronics Engineering Kongu Engineering CollegeTamil NaduIndia Department of Electrical and Electronics Engineering Narasu’s Sarathy Institute of TechnologyTamil NaduIndia Department of Electrical and Electronics Engineering Panimalar Engineering CollegeTamil NaduIndia Department of Electrical and Electronics Engineering Karunya Institute of Technology&SciencesTamil NaduIndia

MigroGrid(MG)has emerged to resolve the growing demand for *** because of its inconsistent output,it can result in various power quality(PQ)*** is a problem that is becoming more and more important for the reliability of power systems that use renewable energy ***,the employment of nonlinear loads will introduce harmonics into the system and,as a result,cause distortions in the current and voltage waveforms as well as low power quality issues in the supply ***,this research focuses on power quality enhancement in the MG using hybrid shunt ***,the performance of the filter mainly depends upon the design,and stability of the *** efficiency of the proposed filter is enhanced by incorporating an enhanced adaptive fuzzy neural network(AFNN)*** performance of the proposed topology is examined in a MAtLAB/Simulink environment,and experimental findings are provided to validate the effectiveness of this ***,the results of the proposed controller are compared with Adaptive Fuzzy Back-Stepping(AFBS)and Adaptive Fuzzy Sliding(AFS)to prove its superiority over power quality improvement in *** the analysis,it can be observed that the proposed system reduces the total harmonic distortion by about 1.8%,which is less than the acceptable limit standard.

关键词： Artificial intelligence resistive inductive load shunt hybrid filter smart grid adaptive fuzzy back-stepping power factor

Numerical simulation and experimental validation of arc welding of DMR-249A steel

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Defence technology（防务技术） 2016年第4期12卷 305-315页

作者： Rishi PAMNANI M. vasudevan t. JAYAKUMAR R VASANtHARAJA K.C. GANESH Prototype training Centre Kalpakkam Tamil Nadu 603 127 India IGCAR Tamil Nadu 603 102 India Metallurgical and Materials Engg Dept NIT Warangal 506 004 India Dept of Mech Engg NITT Tiruchirappalli 620 015 India

the thermo-mechanical attributes of DMR-249 A steel weld joints manufactured by shielded metal arc welding(SMAW) and activated gas tungsten arc welding(A-GtAW) processes were studied using Finite Element Model(FEM) simulation. the thermal gradients and residual stresses were analyzed with SYSWELD software using double ellipsoidal heat source distribution model. the numerically estimated temperature distribution was validated with online temperature measurements using thermocouples. the predicted residual stresses profile across the weld joints was compared with the values experimentally measured using non-destructive techniques. the measured and predicted thermal cycles and residual stress profile was observed to be comparable. the residual stress developed in double sided A-GtAW joint were marginally higher in comparison to five pass SMAW joint due to phase transformation associated with high heat input per weld pass for A-GtAW process. the present investigations suggest the applicability of numerical modeling as an effective approach for predicting the thermo-mechanical properties influenced by welding techniques for DMR-249 A steel weld joints. the tensile, impact and micro-hardness tests were carried to compare the *** benefits of high productivity and savings of labor and cost associated with A-GtAW compared to SMAW process, the minor variation in residual stress build up of A-GtAW joint can be neglected to develop A-GtAW as qualified alternative welding technique for DMR-249 A steel.? 2016 China Ordnance Society. Production and hosting by Elsevier B.V. All rights reserved.

关键词： DMR-249A A-GtAW SMAW FEM SYSWELD thermo-mechanical Simulation

Effect of Intracellular Uptake of Nanoparticle-encapsulated trehalose on the Hemocompatibility of Allogeneic Valves in the VS83 Vitrification Protocol

在线全文

学校读者我要写书评

暂无评论

Effect of Intracellular Uptake of Nanoparticle-encapsulated ...

作者： Balamurugan vasudevan 青岛大学

学位级别：硕士

Research Background:the use of human biological valves referred to as allograft heart valves（AHV）is shown to have numerous improvements above conventional xenografts,significantly concerning hemodynamic reaction and *** allogeneic heart valves preservation necessitates meticulous attention to ensure that the cell integrity is preserved prior to clinical ***,vitrification protocols were reported to preserve the matrix integrity of allograft valves and concomitantly result in low tissue *** has been shown to be involved in retaining cell viability after thawing in IFC *** researches showed that nanoparticle encapsulated trehalose resulted in cryopreservation of mammalian cells with high viability and unblemished *** practice,they are using a nanoparticle to encapsulate trehalose and using it in the VS83 protocol results in minor ice *** of cryopreserved heart valve has been a hurdle demanding the recipient to live on anticoagulants for their entire *** and inflammation significantly hinder the valve grafting due to *** these issues can be sorted out by tissue engineering which will take a long time to achieve ***’s effect on hemocompatibility must be evaluated because it has been shown to be excellent at maintaining cell ***:this study aims to see whether trehalose affects the allogeneic valves hemocompatibility in the VS83 procedure,precisely if the disaccharide will induce an immune reaction and decreases immune response after *** addition,the research seeks to assess if nanoparticle-encapsulated trehalose increases cell viability in IFC cardiovascular preservation techniques and maintains the extracellular matrix *** primary theory is that trehalose increases cell viability by vitrifying allogeneic heart valves and safeguards ECM *** second theory states that the absorption of t

关键词： Ice-FreeCryopreservation Homograftvalve Apatite trehalose Nanoparticle Immunogenicity VS83

Causal analysis of competing atomistic mechanisms in ferroelectric materials from high-resolution scanning transmission electron microscopy data

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

npj Computational Materials 2020年第1期6卷 570-578页

作者： Maxim Ziatdinov Christopher t.Nelson Xiaohang Zhang Rama K.vasudevan Eugene Eliseev Anna N.Morozovska Ichiro takeuchi Sergei V.Kalinin the Center for Nanophase Materials Sciences Oak Ridge National LaboratoryOak RidgeTN 37831USA Computational Sciences and Engineering Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Materials Science and Engineering University of MarylandCollege ParkMD 20742USA Institute for Problems of Materials Science National Academy of Sciences of UkraineKrjijanovskogo 3Kyiv 03142Ukraine Institute of Physics National Academy of Sciences of Ukraine46pr.NaukyKyiv 03028Ukraine

Machine learning has emerged as a powerful tool for the analysis of mesoscopic and atomically resolved images and spectroscopy in electron and scanning probe microscopy,with the applications ranging from feature extraction to information compression and elucidation of relevant order parameters to inversion of imaging data to reconstruct structural ***,the fundamental limitation of machine learning methods is their correlative nature,leading to extreme susceptibility to confounding ***,we implement the workflow for causal analysis of structural scanning transmission electron microscopy(StEM)data and explore the interplay between physical and chemical effects in a ferroelectric perovskite across the ferroelectric–antiferroelectric phase transitions.

关键词： ferroelectric analysis founding

印度南部2型糖尿病患者糖尿病视网膜病变相关危险因素的研究（英文）

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

国际眼科杂志 2017年第9期17卷 1615-1619页

作者： Senthilvel vasudevan Sumathi Senthilvel Jayanthi Sureshbabu 甘露医学科学研究院生物统计系印度喀拉拉邦682041 甘露护理学院基础护理与助产系印度喀拉拉邦682041 印度医学科学研究所印度本地治里605004

目的:探究2型糖尿病患者糖尿病视网膜病变(DR)的严重度及受试者中糖尿病视网膜病变严重程度与其病程、糖化血红蛋白水平、高血压史、年龄和性别的相关性。方法:横断面研究。2012-05/06,采取简单随机抽样方法进行结构化问卷调查,收集100... 详细信息

目的:探究2型糖尿病患者糖尿病视网膜病变(DR)的严重度及受试者中糖尿病视网膜病变严重程度与其病程、糖化血红蛋白水平、高血压史、年龄和性别的相关性。方法:横断面研究。2012-05/06,采取简单随机抽样方法进行结构化问卷调查,收集100例年龄≥35岁糖尿病视网膜病变患者。进行描述性统计、单变量和多变量有序逻辑回归分析。用excel表进行数据录入,并用SPSS 21.0进行数据分析(P<0.05)。结果:100例患者,平均年龄53.16±10.81(35~78)岁。通过单因素分析发现,糖尿病视网膜病变严重度与年龄(P<0.01),糖尿病病程(P<0.001),糖化血红蛋白水平(P<0.001),糖尿病家族史(P<0.01),高血压病史(P<0.05),均呈正相关,高密度脂蛋白(HDL)及年龄与DR严重程度无相关性。除年龄因素外,上述所有因素均为影响糖尿病视网膜病变严重度的独立风险因素。结论:研究表明,糖尿病病程、糖化血红蛋白水平、糖尿病家族史、高血压病史以及性别与糖尿病视网膜病变严重程度密切相关。但多因素分析中,年龄、HDL因素与DR严重程度无关。因此,利用现有治疗手段的有效性和及时控制,可以预防和消除视力威胁性疾病,延缓DR的发生。

关键词：糖尿病视网膜病变风险因素糖尿病视网膜病变严重度多变量分析