检索结果-南通市图书馆

Mode Ⅲ fracture analysis by Trefftz boundary element method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2007年第2期23卷 173-181页

作者： Yuhong Cui Juan Wang Manicka dhanasekar Qinghua Qin Department of Mechanics Tianjin UniversityTianjin 300072 China Centre for Railway Engineering Central Queensland UniversityNorth Rockhampton QLD 4702 Australia Department of Engineering Australian National UmversltyCanberra ACT 0200 Australia

This paper presents a hybrid Trefftz （HT） boundary element method （BEM） by using two indirect techniques for mode III fracture problems. Two Trefftz complete functions of Laplace equation for normal elements and a special purpose Trefftz function for crack elements are proposed in deriving the Galerkin and the collocation techniques of HT BEM. Then two auxiliary functions are introduced to improve the accuracy of the displacement field near the crack tips, and stress intensity factor （SIF） is evaluated by local crack elements as well. Furthermore, numerical examples are given, including comparisons of the present results with the analytical solution and the other numerical methods, to demonstrate the efficiency for different boundary conditions and to illustrate the convergence influenced by several parameters. It shows that HT BEM by usingthe Galerkin and the collocation techniques is effective for mode III fracture problems.

关键词： Hybrid Trefftz method. Galerkin technique .Point-collocation technique .Mode III fracture

COMPARISON OF MODELING TECHNIQUES FOR SELECTING OPTIMIZED AND AUTOMATED PLASMA CUTTING PROCESS PARAMETERS

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

International Journal of Modeling, Simulation, and Scientific Computing 2012年第3期3卷 94-108页

作者： M.SENTHIL KUMAR B.dhanasekar G.RANGA JANARDHANA S.PARAMASIVAM K.S.JAYA KUMAR Department of Mechanical Engineering JNTU KakinadaAndhra PradeshIndia General Motors BangaloreKarnatakaIndia Department of Mechanical Engineering JNTU VizianagaramAndhra PradeshIndia ESAB India Ltd. ChennaiTamilnaduIndia Department of Mechanical Engineering S.S.N.College of Engineering Chennai TamilnaduIndia

The advancement in technologies made the entire manufacturing system,to be operated with more efficient,flexible,user friendly,more productive and cost *** such a system to be focused for advancement is plasma cutting system,which has wider industrial *** are many researches pursuing at various area of plasma cutting technology,still the automated and optimized parameters value selection is *** work is aimed to eliminate the manual mode of feeding the input parameters for cutting *** present,cutting parameters are fed by referring the past cut data information or with the assistance of experienced *** cutting process parameters selections will have direct impact on the quality of the material being cut,and life of the *** paper is intended to automate the process parameters selection by developing the mathematical model with existing cutting process parameters *** this,three different approaches,multiple regression,multiple polynomial regression and AI technique,are selected and analyzed with the mathematical relations developed between the different cutting process *** accuracy and reliability of those methods are *** advantage and disadvantage of those methods for optimal setting conditions are *** appropriate method that can be preferred for automated and optimal settings are ***,the selected technique is checked for accuracy and reliability for the existing cut data.

关键词： Plasma cutting parameters optimized parameters selection multiple polynomial regression(MPR) multiple regression and ANFIS

Development of a Bi-Material Representative Volume Element Using Damaged Homogenisation Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2013年第6期1卷 43-47页

作者： Ali Jelvehpour Manicka dhanasekar Science and Engineering Faculty Queensland University of Technology Brisbane Australia

Most civil engineering structures are formed using a number of materials that are bonded to each other with their surface-to-surface interaction playing key role on the overall response of the structure. Unfortunately these interactions are extremely variable;simplified and extremely detailed models trialed to date prove quite complex. Models that assume perfect interaction, on the other hand, predict unsafe behavior. In this paper a damage mechanics based interaction between two materials of different softening properties is developed using homogenisation approach. This paper describes the process of developing a bi-material representative volume element (RVE) using damaged homogenisation approach. The novelty in this paper is the development of non-local transient damage identification algorithm. Numerical examples prove the stability of the approach for a simplified RVE and encourage application to other shapes of RVEs.

关键词： Transient Gradient Non-Local Homogenisation Damage Mechanics

Brain Tumor Identification Using Data Augmentation and Transfer Learning Approach

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第8期46卷 1845-1861页

作者： K.Kavin Kumar P.M.Dinesh P.Rayavel L.Vijayaraja R.dhanasekar Rupa Kesavan Kannadasan Raju Arfat Ahmad Khan Chitapong Wechtaisong Mohd Anul Haq Zamil S.Alzamil Ahmed Alhussen Department of Electronics and Communication Engineering Kongu Engineering College638060Tamil NaduIndia Department of Electronics and Communication Engineering Sona College of Technology636005Tamil NaduIndia Department of Computer Science and Engineering Sri Sairam Institute of TechnologyChennai600044Tamil NaduIndia Department of Electrical and Electronics Engineering Sri Sairam Institute of TechnologyChennai600044Tamil NaduIndia Department of Computer Science and Engineering Sri Venkateswara College of EngineeringSriperumbudur602117Tamil NaduIndia Department of Electrical and Electronics Engineering Sri Venkateswara College of EngineeringSriperumbudur602117Tamil NaduIndia Department of Computer Science College of ComputingKhon Kaen UniversityKhonKaen40002Thailand School of Telecommunication Engineering Suranaree University of TechnologyNakhon Ratchasima30000Thailand Department of Computer Science College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Computer Engineering College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia

A brain tumor is a lethal neurological disease that affects the average performance of the brain and can be *** India,around 15 million cases are diagnosed *** mitigate the seriousness of the tumor it is essential to diagnose at the ***,the manual evaluation process utilizing Magnetic Resonance Imaging(MRI)causes a few worries,remarkably inefficient and inaccurate brain tumor ***,the examination process of brain tumors is intricate as they display high unbalance in nature like shape,size,appearance,and ***,a precise and expeditious prognosis of brain tumors is essential for implementing the of an implicit *** computer models adapted to diagnose the tumor,but the accuracy of the model needs to be *** all the above mentioned things,this work aims to identify the best classification system by considering the prediction accuracy out of Alex-Net,ResNet 50,and Inception *** augmentation is performed on the database and fed into the three convolutions neural network(CNN)models.A comparison line is drawn between the three models based on accuracy and *** accuracy of 96.2%is obtained for AlexNet with augmentation and performed better than ResNet 50 and Inception V3 for the 120th *** the suggested model with higher accuracy,it is highly reliable if brain tumors are diagnosed with available datasets.

关键词： AlexNet brain tumor data augmentation inception V3 ResNet 50

Cranioplasty with custom made alloplastic prosthetic implant: A case report

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Clinical Cases 2014年第9期2卷 482-487页

作者： Lokendra Gupta IN Aparna dhanasekar Balakrishnan Lingeshwar Deenadayalan Puneeth Hegde Priyanka Agarwal Department of Prosthodontics Manipal College of Dental SciencesManipal 576104 India Flat No. 5 Purushotam Flat No. 64 Second Main Gandhi Nagar Chennai 20 India Department of Pedodontics Manipal College of Dental SciencesManipal 576104 India

Cranial defects often occur due to trauma. The treatment of such defects is a challenge to the skill and knowledge of the practitioner. This article presents one such case, where a 15-year-old boy had suffered extensive loss of the right cranium following a road traffic accident. The patient required rehabilitation of the right fronto-temporal cranial anatomy and was managed using a custom made heat polymerized acrylic alloplastic implant.

关键词： Cranioplasty Cranial implant Acquired defect Heat cure poly methyl methacrylate resin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

多学科结合的牙列美观和功能重建

中国口腔医学继续教育杂志 2015年第5期18卷 248-252页

作者： Mukesh Kumar Goyal Shelly Goyal Veena Hegde dhanasekar Balkrishana Aparna I. Narayana 钟先瑜孟玉坤不详四川大学华西口腔医院四川省成都市武侯区人民南路三段610041

当今患者追求年轻又迷人的微笑且要具有良好舒适的功能。一个功能受损患者的口腔修复重建常涉及多学科知识且在临床上面临重大挑战。在很大程度上，选择合适的患者和合理的跨学科治疗计划对可预见的成功修复具有主导作用，这其中包括患... 详细信息

当今患者追求年轻又迷人的微笑且要具有良好舒适的功能。一个功能受损患者的口腔修复重建常涉及多学科知识且在临床上面临重大挑战。在很大程度上，选择合适的患者和合理的跨学科治疗计划对可预见的成功修复具有主导作用，这其中包括患者的需求．主诉，经济状况和社会经济发展程度。本临床报道介绍应用跨学科途径所治疗的一例严重磨耗伴咬合垂直距离降低的病例。治疗计划包括冠延长术、根管治疗后桩核修复．以及由美学区烤瓷修复体和后牙区全金属修复体共同构成的垂直距离降低重度磨耗牙面修复的咬合重建。

关键词：功能重建学科结合垂直距离降低美观牙列修复重建治疗计划社会经济发展