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Structural Durability & Health Monitoring 2020年第2期14卷 127-145页

作者： Suhas S.Aralikatti K.N.ravikumar Hemantha Kumar H.Shivananda Nayaka v.Sugumaran NationalInstitute of Technology Karnataka Mangaluru575025India vellore Institute of Technology University Chennai600127India

The state of cutting tool determines the quality of surface produced on the machined parts.A faulty tool produces poor sur face,inaccurate geometry and non-economic ***,it is necessary to monitor tool condition for *** process to have superior quality and economic *** the pre-sent study,fault classification of single point cutting tool for hard turning has been carried out by employing machine learning *** force and vibration signals were acquired to monitor tool condition during machining.A set of four tooling conditions namely healthy,worn flank,broken insert and extended tool overhang have been considered for the *** machine learning technique was applied to both vibration and cutting force *** wavelet features of the signals have been extracted using discrete wavelet trans formation(DWT).This transformation represents a large dataset into approximation coeffcients which contain the most useful information of the *** features,among features extracted,were selected using J48 decision tree ***-sification of tool conditions was carried out us ing Naive Bayes algorithm.A 10 fold cross validation was incorporated to test the validity of classifier.A comparison of performance of classifier was made between cutting force and vibration signal to choose the best signal acquisition method in classifying tool fault conditions using machine learning technique.

关键词： Fault diagnosis of cutting tool Naive Bayes classifer,decision tree technique

Connecting Productivity with Social Capital via Daily Mobile Phone Logs

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Social Networking 2016年第2期5卷 62-74页

作者： B. Padmaja v. v. rama Prasad K. v. N. Sunitha Department of CSE JNTUH Hyderabad India Department of CSE Sree Vidyanikethan Engineering College Tirupati India BvrIT Hyderabad College of Engineering for Women Hyderabad India

Human behavior and their social interactions can be quantified and modeled with the use of smart phones and any wearable badges which senses and captures real-life interactions. In traditional social sciences, such information was gathered by conducting surveys. However in digital era, smart phones are regarded as a popular tool which automatically senses much human information to quantify our lives. reality mining gives a clear picture of a human being and its social relations. Social Network Analysis (SNA) is a powerful research tool which provides a comprehensive analysis on ego-alters communications with their individual productivity within a community. In this paper, various popular measures of social network analysis have used to study a closed community through their mobile call logs for a period of time. We experimented various social network measures both on daily basis and also over a period of time. The pattern shows that the relationships and interaction between ego-alter ties have more productive benefits. Using Pearsoncorrelation analysis, we observed that significant (positive) correlation exists between various network properties and their productivity. results showed that degree (size) has the strongest positive correlation with average productivity, followed by effective size, efficiency, constraint, hierarchy, and k-core of an individual. Density and betweenness centrality have a weak, negative correlation with productivity. Hence social capital has a significant influence on human productivity.

关键词： reality Mining Social Network Analysis (SNA) Social Capital

Failure to fire after an electrical injury——A complex syndrome in a soldier: complex regional pain syndrome(CrPS)

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Journal of Medical Colleges of PLA(China) 2015年第1期30卷 28-31页

作者： F.M.H.Ahmad K.v.S.Hari Kumar Departments of Neurology & Endocrinology Command Hospital Chandimandir India

Complex regional pain syndrome(CrPS) is a disorder characterized by an intractable, disabling pain of the affected limb. It is triggered by various injuries and is often resistant to standard therapy. We report a young soldier with CrPS of the right hand sustained from an electrical injury, who had improvement in resting pain with Zoledronic acid. In this report, we discuss the therapeutic options and the role of bisphosphonates in CrPS.

关键词： Complex regional pain syndrome Bisphosphonates Electrical injury regional osteoporosis

降低日粮蛋白质含量并补充氨基酸对泌乳母猪生产性能、乳腺吸收效率和转运体基因表达的影响

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中国饲料 2016年第15期 32-43页

作者： Manjarin r Zamora v Wu G Steibel J P Kirkwood r N Taylor N P Wils-Plotz E Trifilo K Trottier N L 密歇根州立大学动物科学学院东兰辛48824 墨西哥州Montecillo研究生院墨西哥56230 德克萨斯州农工大学动物科学和营养学部学院站77843 密歇根州立大学渔业和野生动物系东兰辛48824 美国密歇根州立大学大型动物临床科学系东兰辛48824

为验证降低日粮蛋白质水平并补充晶体氨基酸是否可以提高氨基酸用于泌乳母猪产奶的使用效率,试验选用3种日粮,蛋白质含量分别为9.5%(不足型)、13.5%(理想型)和17.5%(标准型)饲喂泌乳母猪,各日粮氨基酸水平相同。检测乳腺氨基酸动静脉浓... 详细信息

为验证降低日粮蛋白质水平并补充晶体氨基酸是否可以提高氨基酸用于泌乳母猪产奶的使用效率,试验选用3种日粮,蛋白质含量分别为9.5%(不足型)、13.5%(理想型)和17.5%(标准型)饲喂泌乳母猪,各日粮氨基酸水平相同。检测乳腺氨基酸动静脉浓度差(A-v)、氨基酸运输效率(A-v/A×100)、氨基酸转运载体和乳蛋白基因的转录丰度。在第7和18天,收集采食后动脉、乳腺静脉血液和乳腺组织样品。使用定量PCr测定氨基酸转运载体b0,+AT(SLC7A9)、Y+LAT2(SLC7A6)、ATB0,+(SLC6A14)、CAT-1(SLC7A1)、CAT-2b(SLC7A2)以及β酪蛋白(CSN2)和α乳清蛋白(LALBA)的转录丰度。结果表明,随着蛋白质含量从不足型到标准型逐渐增加,仔猪日增重呈曲线上升(线性和二次方,Pv、运输效率呈二次方增加(Pv呈增加趋势(线性,P=0.08)。第7天,随着粗蛋白质含量增加,异亮氨酸和缬氨酸A-v增加(呈线性,分别为P=0.05和P=0.08)。第18天,异亮氨酸和缬氨酸浓度增加(呈线性,分别为P=0.04和P=0.07)。第7天,血液支链AA(BCAA):赖氨酸(Lys)比值呈二次方降低(P<0.05)。SLC7A9、SLC7A6、SLC6A14、SLC7A1、SLC7A2、CSN2和LALBA的基因表达不受日粮影响。总之,日粮蛋白质含量从17.5%下降到13.5%,并补充晶体氨基酸并不影响仔猪日增重,氨基酸转运载体或乳蛋白基因的表达,但可以增加泌乳第7天乳腺运输效率和赖氨酸与精氨酸动静脉浓度差。这种增加与血液BCAA∶Lys比值下降有关,表明氨基酸运输至乳腺细胞时,阳离子型AA和BCAA之间存在竞争机制。

关键词：氨基酸效率基因哺乳期母猪转运载体

Self-powered and flexible piezo-sensors based on conductivitycontrolled GaN nanowire-arrays for mimicking rapid-and slow-adapting mechanoreceptors

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npj Flexible Electronics 2022年第1期6卷 642-652页

作者： Aadil Waseem Ameer Abdullah Indrajit v.Bagal Jun-Seok Ha June Key Lee Sang-Wan ryu Department of Physics Chonnam National UniversityGwangju 61186Republic of Korea Optoelectronics Convergence research Center Chonnam National UniversityGwangju 61186Republic of Korea

Human skin contains slowly adaptive(SA)and rapidly adaptive(rA)mechanoreceptors,which respond differently to external *** on human tactile perception principles,the fabrication of a self-powered electronic skin(e-skin)that simultaneously mimics SA-and rA-mechanoreceptors is a prime need for robots and artificial prosthetics to interact with the surrounding ***,the complex process of merging multimode sensors to mimic SA-and rA-mechanoreceptors hinders their utilization in *** proposed SA-and rA-mechanoreceptors based on n-type and semi-insulating GaN nanowire *** SA-and rA-mechanoreceptors demonstrated distinguished features such as grasping of objects and detection of their surface *** on piezoelectric sensing principles,the proposed e-skin can simultaneously mimic static and dynamic pressure *** further detected several stimuli of various pressures with low and high *** response and reset times showed by SA-mechanoreceptors were 11 and 18 ms under 1-Hz frequency,which are rapid enough for practical e-skin applications.

关键词： arrays rapid conductivity

Fenton treatment via oxidative mechanism and its kinetics on soil polluted with automatic gas oil

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Petroleum 2018年第4期4卷 452-456页

作者： O.v.Akpoveta W.O.Medjor Eunice Adebowale Medjor Department of Chemical Sciences Ondo State University of Science and Technology(OSUSTECH)OkitipupaP.M.B 353OkitipupaOndo StateNigeria Department of Chemistry Faculty of Science Taraba State UniversityJalingoNigeria Department of Civil Engineering Faculty of Engineering Taraba State UniversityJalingoNigeria

The effectiveness,viability and feasibility of applying Fenton reactants in treating soil contaminated with automatic gas oil(AGO)was investigated *** was simulated to achieve 10%contamination using AGO(diesel)as the primary *** properties and heavy metal contents were characterized using standard analytical methods,while total petroleum hydrocarbon(TPH)content was determined by molecular *** investigation of the soil physicochemical properties shows severe impact of the contaminant on pH,conductivity,phosphorus and(TPH)*** optimum concentration of Fenton reactants determined from the optimization study was found to be 350,000 ppm H2O2 and 600 ppm FeSO4 at optimum room temperature range of 27e30C and optimum pH of *** highly exothermic Fenton oxidation treatment resulted in significant decrease in TPH content by 87.6%after 6 h of periodic monitoring;breaking down the hydrocarbons into non-toxic environmental friendly *** analysis and evaluation shows pseudo-first order mechanism for the Fenton treatment with a calculated rate constant of 0.226 h-1 and half life of 3 h 4 *** Fenton method is found to be very effective and efficient not only for the removal of the diesel contaminant,but also for the restoration of lost physicochemical properties occasioned by the effect of the *** environmental friendliness and fast response time towards effective clean up gives the technique a cutting edge advantage over other conventional *** therefore presents potentials for remediation experts in outright applications on real field challenges.

关键词： Automatic gas oil Physicochemical Total petroleum hydrocarbon Fenton oxidation Pseudo first order Optimization study

Influence of Shot Peening on DIN 1.2714 Hot Work Tool Steel

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Journal of Materials Science and Chemical Engineering 2017年第1期5卷 81-90页

作者： valmik Bhavar Sachin v. Patil Prakash Kattire P. P. Date r. K. P. Singh Kalyani Center for Technology and Innovation (KCTI) Bharat Forge Ltd. Pune India Indian Institute of Technology Bombay (IITB) Mumbai India

Shot peening is one of the most popular surface enhancement technique used to improve fatigue performance of different materials. This paper focuses on to study the effect of different shot peening parameters on micro-structural and mechanical properties of DIN 1.2714 tool steel specimens. Shot peening treatments were carried out by varying shot size and peening intensity. X-ray stress analysis, micro-hardness testing and micro-structural analysis were performed to characterize these specimens. In addition, pin on disk wear testing was executed to recognize wear behavior of this shot peened tool steels. It was observed that along with compressive residual stress generation, shot peening also induces work hardening effect and modifies surface structure which are responsible for significant improvement in this tool steel.

关键词： Shot Peening Surface Enhancement Techniques Tool Steel

Synthesize of AZ31/TiC magnesium matrix composites using friction stir processing

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Journal of Magnesium and Alloys 2015年第1期3卷 76-78页

作者： M.Balakrishnan I.Dinaharan r.Palanivel r.Sivaprakasam Department of Mechanical Engineering Akshaya College of Engineering and TechnologyCoimbatore 642109Tamil NaduIndia Department of Mechanical Engineering V V College of EngineeringTisaiyanvilai 627657Tamil NaduIndia Department of Mechanical Engineering Roever College of Engineering and Technology621212 PerambalurTamil NaduIndia Department of Aeronautical Engineering Karpagam UniversityCoimbatore 641021Tamil NaduIndia

Friction stir processing(FSP)is a novel solid state technique to synthesize metal matrix *** the present work,an attempt has been made to synthesize AZ31/TiC magnesium matrix composites using FSP and to analyze the microstructure using scanning electron microscopy.A groove was prepared on 6 mm thick AZ31 magnesium alloy plates and compacted with TiC *** width of the groove was varied to result in four different volume fraction of TiC particles(0,6,12 and 18 vol.%).A single pass FSP was carried out using a tool rotational speed of 1200 rpm,traverse speed of 40 mm/min and an axial force of 10 *** electron microscopy was employed to study the microstructure of the synthesized *** results indicated that TiC particles were distributed uniformly in the magnesium matrix without the formation of *** was no interfacial reaction between the magnesium matrix and the TiC *** particles were properly bonded to the magnesium matrix.

关键词： Magnesium alloy Friction stir processing TiC Microstruture

远东燃料动力综合体产业结构偏离度的空间分析

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西伯利亚研究 2024年第1期51卷 5-25,119页

作者： [俄]Н.Г.朱尔卡 [俄]О.В.焦米娜张加力(译) 唐娜(校) 俄罗斯科学院远东分院经济研究所俄罗斯科学院经济研究所黑龙江省社会科学院研究生学院江苏省连云港市金辰实业有限公司

俄罗斯东向能源政策对远东燃料动力综合体产业投资产生冲击效应,燃料动力综合体为增加向亚太地区国家的燃料动力资源出口实施了一系列投资项目。2012—2019年,远东燃料动力资源的产业结构出现偏离度。相关计算采用产业指数增长率结构分... 详细信息

俄罗斯东向能源政策对远东燃料动力综合体产业投资产生冲击效应,燃料动力综合体为增加向亚太地区国家的燃料动力资源出口实施了一系列投资项目。2012—2019年,远东燃料动力资源的产业结构出现偏离度。相关计算采用产业指数增长率结构分解法(偏离—比重分析法)的传统模型和空间模型。从国家、宏观区域(区域间)、地区等不同空间层面,对远东燃料动力综合体年均就业人数和总增加值增长率进行结构分解,并得出以下结论:在俄罗斯东向能源政策框架下燃料动力综合体采掘业的发展获得强大推动力,其竞争力分量为正值,弥补了导致全俄经济失稳的负面冲击影响;影响燃料动力综合体采掘业经济发展态势的重要因素在于区域间竞争成败,而非空间外部性;区别于煤炭产业,油气产业具备形成空间外部性的潜力;采掘业的发展领先于其他产业,仍是地区经济飞地。原文发表于俄罗斯《空间经济》杂志2022年第4期((1)),经作者同意以中文刊发于《西伯利亚研究》。

关键词：燃料动力综合体俄东向能源政策投资项目结构偏离度分析区域间协作地方竞争力空间外部性远东

Engineering Measures to Protect the City of Yakutsk from Suprapermafrost Water Impoundment

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Engineering Measures to Protect the City of Yakutsk from Sup...