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Heat treatment optimization for tensile properties of 8011 Al/15% SiCp metal matrix composite using response surface methodology

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Defence Technology（防务技术） 2015年第4期11卷 390-395页

作者： V.VEMBU g.ganesan Department of Manufacturing Engineering Annamalai University

In this study,a mathematical model was developed to optimize the heat treatment process for maximum tensile strength and ductility of aluminum(8011) silicon carbide particulate *** process parameters are solutionizing time,aging temperature,and aging *** experiments were performed on an universal testing machine according to centre rotatable design matrix.A mathematical model was developed with the main and interactive effects of the parameters *** analysis of variance technique was used to check the adequacy of the developed *** optimum parameters were obtained for maximum tensile *** examination shows the cracks and dimples on the fractured surfaces of heat-treated specimen.

关键词：热处理工艺优化颗粒复合材料响应曲面法拉伸性能金属基体万能试验机开发模型铝

Hot Deformation Behavior of 2124 Al Alloy

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Journal of Materials Science & Technology 2006年第5期22卷 611-615页

作者： S.Ramanathan R.Karthikeyan V.Deepak Kumar g.ganesan Department of Manufacturing Engineering Annamalai University Annamalai Nagar-608 002India

The mechanical behavior of 2124 Al alloy produced by powder metallurgy was investigated with compression test at different temperatures and strain rates. The tests were performed in the temperature range of 300℃～500℃ and at strain rates from 0.001 s^-1 to 1.0 s^-1. The compression flow curves exhibited an initial sharp increase with strain, followed by monotonous hardening. The maximum stress decreased with decreasing strain rate and increasing temperature. The hot deformation characteristics of the material were studied using processing maps. The domain of safety and unsafe regime were identified and validated through microstructural examination.

关键词： Flow stress Power dissipation efficiency Flow instability Flow localization Processing map

Parametric optimization of electrochemical machining of Al/15% SiC_p composites using NSgA-Ⅱ

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Transactions of Nonferrous Metals Society of China 2011年第10期21卷 2294-2300页

作者： C.SENTHILKUMAR g.ganesan R.KARTHIKEYAN Department of Manufacturing Engineering Annamalai University Department of Mechanical Engineering

Electrochemical machining（ECM） is one of the important non-traditional machining processes,which is used for machining of difficult-to-machine materials and intricate *** a complex process,it is very difficult to determine optimal parameters for improving cutting *** removal rate and surface roughness are the most important output parameters,which decide the cutting *** is no single optimal combination of cutting parameters,as their influences on the metal removal rate and the surface roughness are quite opposite.A multiple regression model was used to represent relationship between input and output variables and a multi-objective optimization method based on a non-dominated sorting genetic algorithm-Ⅱ（NSgA-Ⅱ） was used to optimize ECM process.A non-dominated solution set was obtained.

关键词： electrochemical machining metal removal rate surface roughness non-dominated sorting genetic algorithm(NSgA-Ⅱ)

BRCA1,PARP,and 53BP1:conditional synthetic lethality and synthetic viability

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Journal of Molecular Cell Biology 2011年第1期3卷 66-74页

作者： Amal Aly Shridar ganesan Cancer Institute of New Jersey Robert Wood Johnson Medical School-UMDNJ195 Little Albany StreetNew BrunswickNJ 08903USA

BRCA1 plays a critical role in the regulation of homologous recombination(HR)-mediated DNA double-strand break ***1-deficient cancers have evolved to tolerate loss of BRCA1 *** renders them vulnerable to agents,such as PARP inhibitors,that are conditionally‘synthetic lethal’with their underlying repair *** studies demonstrate that BRCA1-deficient cells may acquire resistance to these agents by partially correcting their defect in HR-mediated repair,either through reversion mutations in BRCA1 or through‘synthetic viable’loss of *** findings and their clinical implications will be reviewed in this article.

关键词： DNA repair BRCA1 53BP1 PARP

Performance Analysis of a Heterogeneous Network Employing DAPSK Based OFDMA-PON

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China Communications 2023年第3期20卷 128-145页

作者： Priyadharshini Rajasekaran geetha ganesan Department of Electronics and Communication Engineering Sri Venkateswara College of EngineeringSriperumbudur 602117Tamil NaduIndia Department of Electronics and Communication Engineering College of Engineering GuindyAnna UniversityChennai 600025Tamil NaduIndia

Recent mobile broadband networks require heterogeneous networks supporting high capacity on demand.A hybrid Fiber-Wireless(Fi-Wi)access network integrating Differential Amplitude and Phase Shift Keying(DAPSK)based-Orthogonal Frequency Division Multiple Access(OFDMA)Passive Optical Network(PON)and 4g wireless network using Radio over Fiber(Ro F)technique is *** proposed heterogeneous network is simulated,and the performance is analyzed in terms of Bit Error Rate(BER),Error Vector Magnitude(EVM),Capacity,and Spectral *** proposed network is simulated considering a higher data rate of 10 and 25 gbps,and the effect of system parameters like Laser Power,Fiber Length,and Number of users is *** results show that a higher network capacity of 720 gbps with an average capacity of about 45 gbps and a higher spectral efficiency of 4.85 bps/Hz is achieved for the multi-user heterogeneous network link with sixteen *** minimum value of optical power sufficient to achieve the desired BER is found to be-6 *** suitability of the proposed integrated architecture in supporting multiple services is analyzed by considering different services at each *** spectral efficiency of the multi-service link varies from 3 to 4 bps/Hz.

关键词： DAPSK OFDMA PON RoF Spectral ef-ficiency

Minimum Spanning Trees Across Well-Connected Cities and with Location-Dependent Weights

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Communications in Mathematics and Statistics 2022年第1期10卷 1-50页

作者： ghurumuruhan ganesan Institute of Mathematical Sciences HBNIChennaiIndia

Consider n nodes{X_(i)}_(1≤i≤n) independently and identically distributed(i.i.d.)across N cities located within the unit square *** city is modelled as an r_(n)×r_(n)square,and MSTC_(n)denotes the weighted length of the minimum spanning tree containing all the n nodes,where the edge length between nodes X_(i)and X_(j)is weighted by a factor that depends on the individual locations of X_(i)and X_(j).We use approximation methods to obtain variance estimates for MSTC_(n)and prove that if the cities are well connected in a certain sense,then MSTC_(n)appropriately centred and scaled converges to zero in *** the above proof techniques we also study MST_(n),the length of the minimum weighted spanning tree for nodes distributed throughout the unit square S with location-dependent edge *** this case,the variance of MST_(n)grows at most as a power of the logarithm of n and we use a subsequence argument to get almost sure convergence of MST_(n),appropriately centred and scaled.

关键词： Minimum spanning tree Well-connected cities Location-dependent edge weights

Chloride-Bridged Dimeric SalphenZr(IV) Cobaltate Catalyst Unleashes the Potential of Base-Free Carbonylative Polymerization for Biodegradable PHAs

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Chinese Journal of Chemistry 2023年第24期41卷 3560-3566页

作者： Vinothkumar ganesan Sungho Yoon Department of Chemistry Chung Ang University84 Heukseok-roDongjak-guSeoul06974 Republic of Korea

Poly(3-hydroxyalkanoates) (PHAs) are a promising class of biodegradable polymers,exhibiting properties comparable to traditional petroleum-based ***,the widespread commercialization of PHAs is hindered by the absence of an efficient and economically viable catalytic system,impeding their competitiveness against non-biodegradable *** an effort to address this challenge,we present a study on a newly developed chloro-bridged dimeric salphen zirconium cobaltate complex for the direct synthesis of PHAs via carbonylative polymerization of *** catalytic system demonstrates favorable activity under mild reaction conditions,enabling complete monomer conversion and an impressive 92% selectivity towards PHA *** meticulous control experiments and mechanistic studies,we have gained crucial insights into the polymerization ***,our findings challenge the prevailing notion of sequential ring-opening polymerization of in-situ generated β-lactones as the primary ***,we demonstrate that the polymerization predominantly proceeds through direct co-polymerization of epoxide and carbon monoxide,unveiling a unique and efficient mechanism for PHA synthesis.

关键词： C1 building blocks Chloro bridged salphenZr(IV)dimer Homogeneous catalysis Carbonylation Carbonylative polymerization Biodegradable polymer Poly(3-hydroxyalkanoates)

Anaerobic tapered fluidized bed reactor for starch wastewater treatment and modeling using multilayer perceptron neural network

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Journal of Environmental Sciences 2007年第12期19卷 1416-1423页

作者： RANgASAMY Parthiban PVR Iyer ganesan Sekaran Department of Chemical Engineering Sri Venkateswara College of Engineering Sriperumbudur 602 105TamilnaduIndia. Department of Environmental Technology Central Leather Research Institute Chennai 600 025TamilnaduIndia

treatability of synthetic sago wastewater was investigated in a laboratory anaerobic tapered fluidized bed reactor （ATFBR） with a mesoporous granular activated carbon （gAC） as a support material. The experimental protocol was defined to examine the effect of the maximum organic loading rate （OLR）, hydraulic retention time （HRT）, the efficiency of the reactor and to report on its steady- state performance. The reactor was subjected to a steady-state operation over a range of OLR up to 85.44 kg COD/（m^3·d）. The COD removal efficiency was found to be 92% in the reactor while the biogas produced in the digester reached 25.38 m^3/（m^3·d） of the reactor. With the increase of OLR from 83.7 kg COD/（m^3·d）, the COD removal efficiency decreased. Also an artificial neural network （ANN） model using multilayer perceptron （MLP） has been developed for a system of two input variable and five output dependent variables. For the training of the input-output data, the experimental values obtained have been used. The output parameters predicted have been found to be much closer to the corresponding experimental ones and the model was validated for 30% of the untrained data. The mean square error （MSE） was found to be only 0.0146.

关键词： anaerobic digestion tapered fluidized bed reactor organic loading rate biogas mesoporous granular activated carbon,modeling artificial neural network

Controllability results for damped second-order impulsive neutral integrodifferential systems with nonlocal conditions

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控制理论与应用（英文版） 2013年第2期11卷 186-192页

作者： ganesan ARTHI Krishnan BALACHANDRAN Department of Mathematics Bharathiar University

In this paper, we establish a set of sufficient conditions for the controllability of damped second-order impulsive neutral integrodifferential systems with nonlocal initial conditions in Banach spaces. The approach used is the Sadovskii fixed point theorem combined with a noncompact condition on the cosine family of operators. An example is oresented to illustrate the result.

关键词： Controllability Damped second-order differential equations Impulsive differential equations Neutralintegrodifferential equations Nonlocal conditions