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Dynamic hesitant fuzzy linguistic group decision-making from a reliability perspective

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Journal of Systems Engineering and Electronics 2018年第5期29卷 1009-1021页

作者： MA Zhenzhen PONNAMBALAM kumaraswamy ZHU Jianjun ZHANG Shitao College of Economics and Management Nanjing University of Aeronautics and Astronautics Department of Systems Design Engineering University of Waterloo School of Mathematics & Physics Science and Engineering Anhui University of Technology

A dynamic hesitant fuzzy linguistic group decisionmaking(DHFLGDM) problem is studied from the perspective of information reliability based on the theory of hesitant fuzzy linguistic term sets(HFLTSs). First, an approach is applied to transform the dynamic HFLTSs(DHFLTSs) into a set of proportional linguistic terms to eliminate the time dimension. Second, expert reliability is measured by considering both group similarity and degree of certainty, and an optimization method is employed to quantify the linguistic terms by maximizing the group similarity. Third, through computing the attribute stability as well as its reliability, a combination rule which considers both reliability and weight is proposed to aggregate the information, and then the aggregated grade values and degree of stability are used to make a selection. Finally,the application and feasibility of the proposed method are verified through a case study and method comparison.

关键词： dynamic decision-making hesitant fuzzy linguistic term sets(HFLTSs) proportional linguistic terms group similarity degree of certainty

Enhancement of seal life through carbon composite back-up rings under shock loading conditions in defence applications

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Defence Technology（防务技术） 2016年第1期12卷 39-45页

作者： Shankar BHAUMIK A.kumaraswamy S.GURUPRASAD R&DE(Engrs.) Pune 411015MaharashtraIndiab defence institute of advanced technology(du) Pune 411025MaharashtraIndia

The life of Nitrile Butadiene Rubber(NBR) O-ring seal having shore hardness of A70 and A90 under shock loading conditions was investigated by a specially designed pneumo-hydraulic shock test rig. Shock tests have been carried out on bare seals, seal with conventional polytetrafluoroethylene(PTFE) back-up rings and seal with newly developed carbon composite back-up rings to study its behaviour under different operating conditions until failure. Experiments were conducted by varying annular gap ranging from 0.3 to 0.5 mm, oil temperature from 30 ℃ to 70 ℃ and rate of pressure rise from 600 to 2400 MPa/s. Significant enhancement in seal life was observed with carbon composite back-up ring at reduced annular clearances compared to seal life with conventional PTFE back-up ring and without back-up rings.

关键词：碳纤维复合材料密封寿命载荷条件冲击试验台压力上升应用国防 O型密封圈

Parametric study of single confined fragment launch explosive device

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Defence Technology（防务技术） 2019年第2期15卷 179-185页

作者： Pankaj K.Choudha A.kumaraswamy Kusumkant D.Dhote Armament Research & Development Establishment (DRDO) Defence Institute of Advanced Technology

In this article, parametric study of single confined fragment launch device was carried out. The configuration proposed was further studied to derive the empirical relationship for effect of fragment size,charge size, confinement thickness on fragment velocity. The simulations were carried out using ANSYSAUTODYNE explicit solver. Fragment velocities were estimated as a function of different parametric combinations of explosive quantities, charge length to diameter ratio, fragment height to diameter ratio,confinement thickness, fragment material and fragment mass. The data was further converted to charge to metal ratio under fragment and confinement. It was observed that, increase in confinement thickness,charge quantity and decrease in fragment height increases the fragment velocity. It is also noted that,charge to metal mass ratio under fragment significantly affects the fragment velocity. At the end, an empirical relationship for fragment velocity interms of all these parameters was established. Using these relations, two velocities 1831.92 m/s and 2523.9 m/s required for NATO STANAG 4496 IM test were estimated. The design parameters for these velocities are presented. Also, the results estimated using the empirical relationship has been compared with published experimental data. Error in the predicted velocities is within the acceptable range. The empirical relationship proposed will be useful for finalization of design of the fragment launch device.

关键词： Confinement Fragment size Empirical relationship Fragment velocity Insensitive munition test Fragment launching device

Influence of welding consumables on tensile and impact properties of multi-pass SMAW Armox 500T steel joints vis-a-vis base metal

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Defence Technology（防务技术） 2018年第3期14卷 188-195页

作者： Ambuj Saxena A.kumaraswamy G.Madhusudhan Reddy Vemuri Madhu Defence Institute of Advanced Technology(DU) Pune 411025India Defence Metallurgical Research Laboratory KanchanbaghHyderabad 500048India

In this investigation, comparative study of tensile and impact properties of multi-pass SMAW Armox500 T steel joints fabricated by austenitic stainless steel(ASS) and low hydrogen ferritic steel(LHF)consumables vis-a-vis base metal was carried out. The tensile tests were conducted on computer controlled Walter t Bai Ag UTM at a nominal strain rate of 10à3 sà1. Subsequently, charpy impact tests were carried out on an instrumented Zwick-Roell test setup to obtain load vs. displacement and maximum energy absorbed vs. displacement of the specimen. It was observed that, the joint efficiency of weldment processed by LHF consumable was 41.7% and weldment processed by ASS was 30.6% of its base metal indicating the influence of electrode consumable on tensile properties of the joints. On the contrary, impact toughness of weldment processed by ASS was 20% more and weldment processed by LHF was 12% less than that of base metal. Microstructural studies also revealed that, ASS can be considered as a candidate welding consumable for good strain hardening and toughness of the welding joint in impact applications. However, LHF steel consumable is recommended for welding joints that requires higher joint efficiency under tensile loading conditions.

关键词： SMAW 不锈钢金属相焊接张力关节性质传递

Taxonomical outlines of bio-diversity of Karnataka in a 14th century Kannada toxicology text Khagendra Mani Darpana

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Asian Pacific Journal of Tropical Biomedicine 2013年第8期3卷 668-672页

作者： Sathyanarayana Bhat kumaraswamy Udupa Consultant 29Second CrossSanjayanagaraBangaloreKarnatakaIndia FacultyDepartment of Botany SJCBM College SringeriChikmagalurKarnatakaIndia

Origin of ancient Indian toxicology can be dated back to vedic *** of both animate and inanimate world were very well understood during the *** and Atharva vedic texts describe such *** classifying such toxins,Charaka Samhitha,thebasic literature of Indian Medicine used gold and ghee as panaceas to counter act *** considers toxicology as one among the eight specialized branches of medical ***,the available literature on this is very ***,they have been discussed briefly in Charaka and Sushrutha *** I,a Jain scholar who lived on the foothills of the Western Ghats,in Southern India in 1350 A.D.,felt this vacuum and composed an independent,elaborate Kannada text on *** less known text Khagendra Mani Darpana(KMD)is the first ever documented complete text on toxicology in the *** Indian wisdom on plant and animal diversities are very well reflected in this unique toxicological *** past to Linnean era,KMD gives vivid descriptions on zoological and botanical diversities of the *** astonishing fact is an evidence of our ancestor's curiosities about the nature around them.A critical overview of the bio-diversity described in KMD text is discussed in this paper.

关键词： Biodiversity Khagendra Mani Darpana Toxicology

In vitro analysis on bactericidal screening and antioxidant potentiality of leaf and root extracts of Thottea siliquosa(Lam.)Ding *** ethnobotanical plant

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Asian Pacific Journal of Tropical Biomedicine 2013年第11期3卷 859-865页

作者： Saiba Abdul Wahab Nusaiba kumaraswamy Murugan College of Pharmaceutical Sciences Medical College Plant Biochemistry and Molecular Biology Laboratory Department of BotanyUniversity College

Objective:Natural products of plant origin are potential source of novel antimicrobial and antioxidative *** siliquosa(Lam.)Ding Hou.(***).A medicinal herb used by local tribals for treating various *** present study aims at the phytochemical screening,GC-MS analysis,in vitro antibacterial activity and antioxidant potentiality of root and leaf extracts of ***:Hot continuous Soxhlct extraction,GC-MS analysis,antibacterial analysis by disc diffusion,microdilution assay and antioxidant potentialities by hydroxyl radical and nitric oxide radical *** data was statistically ***:Phytochemical screening of the ethyl acetate and methanolic extract of leaf and root revealed the presence of phenols,alkaloids,tannins and *** extract revealed a pool of phytochemicals by comparison with authentic standards from spectral *** the extracts has shown their broad spectrum of inhibition against the selected bacteria Staphylococcus aureus,Escherichia coli,Pseudomonas aeruginosa and Klebsiella pneumonia compared with standard antibiotic drug *** extracts showed antioxidant activity by scavenging of free radicals such as hydroxyl and nitric *** IC_(50)values of the ethyl acetate extracts leaf and root and standard in this assay were I67.5±0.67,99.4±1.2,192±2.5μg/mL *** those methanolic extracts of leaf and root were 269.5±0.89 and 289.1±2.66μg/mL ***,ethyl acetate and methanolic extracts also caused a moderate dose-dependent inhibition of nitric oxide with an IC_(50)range 65.5±1.55 to 148±3.09μg/*** inhibitory activities were found to be dose ***:The present study provides evidence that ethyl acetate and methanol extract of leaf and root of *** are potential source of natural antioxidants and bactericidal *** is essential that research should continue to isolate and purify the bio active components of this natural p

关键词： Antibacterial activity Antioxidant potentiality Phytochemicals Soxhlet extraction Thottea siliquosa

Assessment of microfilaria prevalence in Karimnagar and Chittoor Districts of Andhra Pradesh,India

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Asian Pacific Journal of Tropical Medicine 2010年第8期3卷 647-650页

作者： Suryanaryana Murty Upadhayula Srinivasa Rao Mutheneni Sriram kumaraswamy Madhusudhan Rao Kadiri Bioinformalics Group Biology DivisionIndian Institute of Chemical Technology(CSIR).Hyderabad-500 007Andhra PradeshIndia

Objective:To assess the prevalence of disease and microfilaraemia in villages of Karimnagar and Chittoor ***:Data on age and sex of all the respondents were collected and compared with the microfilaria rate(mf) and density(20μL of peripheral blood by using finger prick method) to examines the relationship between the dynamics of Wuchereria bancrofti among the ***:Microfilaraemia prevalence was found among all the age groups and its occurrence was more prevalent especially above 30 years age ***,the microfilaraemia and disease rates were found significantly higher in males compared to females. Conclusions:Using these baseline data would be useful in planning for the elimination of lymphatic filariasis in Andhra Pradesh as per the WHO goal to eliminate lymphatic filariasis by 2020.

关键词： Lymphatic filariasis Karimnagar Chittoor Microfilaria prevalence Age group

Assessment of groundwater quality in the flood plains of upper Palar River, India

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Chinese Journal Of Geochemistry 2012年第1期31卷 15-23页

作者： Rutharvel Murthy Kuppuraj Dhanakumar Selvaraj Solaraj Govindaraj Mohanraj Rangaswamy Jawahar Raj Narayanasamy kumaraswamy Kuppanagounder Department of Geography School of GeosciencesBharathidasan UniversityTiruchirappalli 620024India Department of Environmental Management Bharathidasan UniversityTiruchirappalli 620024India Department of Geology National CollegeTiruchirappalli 620001India

Groundwater is generally presumed to be good for human consumption and is used as a main source of drinking water. Although there are numerous reasons for groundwater pollution, anthropogenic sources are consid-ered as the prime ones. In this study, twenty-two groundwater samples were collected from the flood plains of upper Palar River during the pre- and post-monsoon seasons to assess the extent of pollution and effects on human health. Physico-chemical characteristics of groundwater were analyzed and compared with those of drinking water standards recommended by the World Health Organization (WHO) and the Bureau of Indian Standards (BIS). The Piper's tri-linear diagram shows the nature of alkali earth with the high contents of alkalies and prevailing sulphate in the pre-sent samples. The univariate statistics and correlation analysis were performed to find out the relationships between the variables. The tannery effluents, solid wastes and sewage were suspected to be the predominant sources of pollu-tion in the area.

关键词：地下水污染冲积平原水质评价印度饮用水标准上游物理化学特性世界卫生组织

Sustainability issues in agro-ecology: Socio-ecological perspective

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Agricultural Sciences 2012年第2期3卷 153-169页

作者： S. kumaraswamy Department of Crop Physiology University of Agricultural Sciences GKVK Campus Bangalore India

In the recent past there has been concern to address the declining trends and deteriorating ecological elements and their functions in productive agricultural landscapes. The efforts to revive the ecological functions needs multiple scale approach, which include scientific understanding, time dependent restorative activities and incorporation of wisdom of the stakeholders. Conservation initiatives linked to precision farming is an apt mechanism to minimize the loss of natural resources of agricultural landscapes to maintain the complex stabilizers of ecological functions. Such an effort must address the scientific evaluation of the farm as “ecologically sustainable unit” with due consideration to social construct at local to regional level. Sustainability indices can be useful tools for evaluating the farms to isolate degradative factors and identify ecologically conservative practices. This review will analyze certain inter-linked concepts relevant to address the sustainability issues in agro-ecology at the interface of socio-ecological perspective.

关键词： Agro-Ecology Biodiversity Ecosystem Services Conservation Farming Sustainability Social Capital Climate Change