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地应力对水压致裂裂纹扩展影响的数值模拟

辽宁工程技术大学学报（自然科学版） 2013年第1期32卷 115-118页

作者：陈庚徐涛唐春安 ranjith P G 大连大学材料破坏力学中心辽宁大连116622 成都理工大学地质灾害防治与环境保护国家重点实验室四川成都610059 大连理工大学土木工程学院辽宁大连116024 莫纳什大学土木工程系

研究岩石在渗流-应力作用下裂纹萌生、扩展的破坏机制问题,采用岩石破裂过程分析软件对不同地应力水平和含不同倾角裂纹下水压致裂裂纹扩展进行了数值模拟研究,结果表明:在内孔水压作用下,随着地应力由80 MPa逐渐减少到45 MPa时,形成的... 详细信息

研究岩石在渗流-应力作用下裂纹萌生、扩展的破坏机制问题,采用岩石破裂过程分析软件对不同地应力水平和含不同倾角裂纹下水压致裂裂纹扩展进行了数值模拟研究,结果表明:在内孔水压作用下,随着地应力由80 MPa逐渐减少到45 MPa时,形成的平直裂纹由垂直于水平主应力方向逐渐向偏离水平主应力的方向发展,同时周围伴随着许多随机裂纹;预制裂纹水压致裂可以看出水压是穿过预制裂纹的,该成果为石油工业提高石油开采率提供了理论基础和科学依据.

关键词：渗流-应力耦合非均匀性岩石破裂水压致裂数值模拟裂纹扩展水平主应力石油工业

Leaking Mycotic Aneurysm of Abdominal Aorta in a 14-Year-Old Boy with Infective Endocarditis and Severe Mitral Regurgitation—A Rare Case Report

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World Journal of Cardiovascular Surgery 2021年第1期11卷 8-15页

作者： Harish Babu Ravulapalli Ramesh Srigiri Periyasamy ranjith Karthekeyan Mahesh Vakamudi Narayana Medical College & Hospital Nellore India Perioperative Medicine Fakeeh University Hospital Dubai United Arab Emirates Department of Cardiothorasic Surgery Sri Ramachandra Medical College Porur India Department of Cardiac Anaesthesiology Sri Ramachandra Medical College Porur India Sri Ramachandra Medical College Porur India

We present a case of leaking mycotic aneurysm of abdominal aorta complicated by infective endocarditis in a young boy of 14 years age. This boy with history of rheumatic heart disease with vegetations on mitral valve and severe mitral regurgitation landed up in complications of infective endocarditis like femoral artery thrombo embolism followed by an abdominal aortic aneurysm with contained rupture. This case was successfully managed addressing two problems i.e. valve and aneurysm repair in single sitting.

关键词： Mycotic Aneurysm Infective Endocarditis

Mapping the Flood Risk Exposure Using Open-Source Geospatial Tools and Techniques: A Case of Gampaha Divisional Secretariat Division, Sri Lanka

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Journal of Geoscience and Environment Protection 2022年第10期10卷 18-31页

作者： Sundaralingam Suthakaran Sauri Jayakody Shyamantha Subasinghe Nileesha Seneviratne ranjith Alahakoon Department of Geography Faculty of Arts and Culture Eastern University Chenkaladi Sri Lanka Department of Town and Country Planning Faculty of Architecture University of Moratuwa Moratuwa Sri Lanka Department of Geography Faculty of Arts University of Peradeniya Peradeniya Sri Lanka Disaster Management Center Nuwara Eliya Sri Lanka

The use of open-source data and tools in disaster exposure mapping is presented in this paper. Disaster exposure is a collection of the element at risk to potential loss. Gampaha divisional secretariat (DS) is a study area laid on the lower part of the Attanagalu Oya river basin. As the geospatial tools, OpenStreetMap (OSM), Java OpenStreetMap (JOSM), QGIS, GPS Essentials, and Open Map Kit (OMK) are used. The elements of disaster exposure, including the number of people or types of assets, are surveyed and inventoried using the OSM platforms. Local, national, and international agencies produce and evaluate the data. The study developed spatial data for building footprints of 165,000 households, street lengths of 2300 km, hospital units of 16, and utility units of 2300. This could overcome the main challenges of exposure mapping in the area. The procedure developed in the exposure mapping can be used in a data-sparse environment. Exposure mapping is generally used to estimate the impact of hazards or disasters, which are essential in effective disaster management. How are there still remaining challenges in disaster exposure mapping such as less awareness about the mapping procedure, lack of government support, internet access, hardware, and inability to understand the value of exposure mapping?

关键词： Spatial Data Disaster Management Exposure Mapping Open-Source Software

Alternative routes of insulin delivery

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中南大学学报（医学版） 2009年第10期34卷 933-948页

作者： ranjith K.Krishnankutty Aju Mathew Saikiran K.Sedimbi Shrikumar Suryanarayan Carani B.Sanjeevi Department of Molecular Medicine and Surgery Karolinska Institute Research and Development Biocon Limited

Parenteral route of insulin administration has been the mode of treatment for all Type 1 diabetics and Type 2 diabetics with *** compliance has really been a major concern for this route of *** alternative routes of administration are under consideration for effective glycemic control,including oral,inhaled,buccal,nasal,and patch *** of the approaches involving inhaled insulin has now reached the *** other candidates may reach the market in the near future,the promising one being oral insulin.

关键词：胰岛素糖尿病治疗方法临床分析

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优化DC/DC转换控制器的EMC滤波器

UPS应用 2017年第4期 55-57页

作者： ranjith Bramanpalli 伍尔特电子

为保持高效率，现代电源需要进一步降低功率损耗。开关模式电源和DC/DC开关控制器是先进且高效的装置，但如果电路和电路板布局设计不理想，可能会导致发射更多无线电干扰。本文探讨了通过系统地实施输入滤波器来降低DC/DC开关控制器中... 详细信息

为保持高效率，现代电源需要进一步降低功率损耗。开关模式电源和DC/DC开关控制器是先进且高效的装置，但如果电路和电路板布局设计不理想，可能会导致发射更多无线电干扰。本文探讨了通过系统地实施输入滤波器来降低DC/DC开关控制器中的对称干扰电压。

关键词： DC/DC 输入滤波器转换控制器 EMC 开关模式电源开关控制器优化低功率损耗

直流、单向脉冲和换向脉冲法制备镍-钴-碳化钨复合镀层的比较(英文)

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电镀与涂饰 2013年第3期32卷 9-13页

作者： ranjith Bose G.Paruthimal Kalaignan K.N.Srinivasan R & D Department Reem Batteries & Power Appliances Co SAOC Sultanate of Oman Advanced Nano-Composite Coatings Laboratory Department of Industrial Chemistry Alagappa University Karaikudi-630 003 Tamilnadu India Central Electrochemical Research Institute Karaikudi-630 006 Tamilnadu India

在醋酸盐镀液体系中采用直流(DC)、单向脉冲电流(PC)和换向脉冲电流(PRC)3种方法制备了Ni-Co-WC复合镀层。采用扫描电镜及电化学阻抗谱(EIS)表征了镀层的微观组织及耐蚀性。结果表明,镀层的微观结构及性能受镀层中WC含量的影响很大。在... 详细信息

在醋酸盐镀液体系中采用直流(DC)、单向脉冲电流(PC)和换向脉冲电流(PRC)3种方法制备了Ni-Co-WC复合镀层。采用扫描电镜及电化学阻抗谱(EIS)表征了镀层的微观组织及耐蚀性。结果表明,镀层的微观结构及性能受镀层中WC含量的影响很大。在最佳WC含量的情况下,镀层的显微硬度及耐蚀性都明显提高。与PC和DC法制备的复合镀层相比,PRC法制备的复合镀层具有更致密的表面,更高的显微硬度以及更好的耐蚀性。

关键词：镍-钴合金碳化钨复合镀层显微硬度电化学表面形貌

Hardness-Based Non-destructive Method for Developing Location Specific S-N Curves for Fatigue Life Evaluation

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Journal of Civil Engineering and Architecture 2016年第2期10卷 183-191页

作者： Chaminda S. Bandara Sudath C. Siriwardane Udaya I. Dissanayake ranjith Dissanayake Department of Civil Engineering University of Peradeniya Peradeniya 20400 Sri Lanka Department of Mechanical and Structural Engineering and Material Science Faculty of Science and Technology University ofStavanger Stavanger N-4036 Norway

This paper first describes the importance of using location specific S-N curves for fatigue damage assessment of existing steel structures. It discusses the existing concepts and methods for developing S-N curves using empirical formulae and monotonic strength parameters, such as the ultimate tensile strength and hardness. It also discusses relationships among these monotonic parameters. Then it presents formulae for developing hardness-based full range S-N curves for medium strength steels. The formulae are verified using experimental data obtained from both monotonic and cyclic testing. Finally, it describes the advantages of these hardness-based formulae for developing location specific S-N curves as hardness testing is a non-destructive test which can be carried out on specific locations in structures.

关键词： Stress life curve fatigue life hardness steel structures non-destructive test.

Solar Cosmic Ray Produced Noble Gases in Martian Shergottites

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Solar Cosmic Ray Produced Noble Gases in Martian Shergottite...

2016中国地球科学联合学术年会

作者： P.M.ranjith 贺怀宇苏菲林杨挺缪秉魁中国科学院地质与地球物理研究所桂林理工大学

Introduction:To know the interplanetary sojourn of the meteoroids Cosmic Ray exposure Age(CREA)is an essential parameter to be measured for every meteorite *** of CREA is based on Galactic Cosmic Ray(GCR)based production rates of the respective cosmogenic *** are observed as influenced by the Solar Cosmic Rays(SCR)in addition to GCR during their space *** was first

关键词： Solar Cosmic Ray Produced Noble Gases in Martian Shergottites

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斯星兰卡椰子木材的利用

世界热带农业信息 1990年第1期 15-18页

作者： ranjith Mahindapaha 黄守宏

本文介绍了斯里兰卡公元2000年前后椰子木材的供求状况和对椰子木材的利用现状。

关键词：椰子树木材防腐剂斯里兰卡工业用材立方米原木机械化加工木材资源利用现状护墙板