Volume 3, Issue 9, September 2012
Application of Laplace Wavelet Kurtosis and Wavelet Statistical Parameters for Gear Fault Diagnosis
Praneeth Chandran, M. Lokesha, M.C. Majumder and Khalid Fathi Abdul Raheem
Vellore Institute of Technology, Vellore, Tamil Nadu, India
Department of Mechanical Engineering, Caledonian College of Engineering, Oman
Department of Mechanical Engineering, NIT, Durgapur, India
The methodology of vibration analysis for condition monitoring has been evolving at a rapid stage in the recent years. The ability to efficiently detect non-stationary, non-periodic, transient features of the vibration signal makes the wavelet analysis a demanding tool for condition monitoring. In this paper the application of Laplace wavelet kurtosis for processing vibration signal to detect faults in gears is presented. A gear testing apparatus is used for experimental studies to obtain vibration signal from a healthy and faulty gears. An experimental data is processed to compare the fault diagnostic capability of wavelet kurtosis with various wavelet statistical parameters such as Crest Factor, Impulse Factor and Shape Factors as obtained from Laplace wavelet. Further the Laplace wavelet kurtosis method is investigated for various working condition of the gear.Finally application of ANN is used for automated gear fault diagnosis by using the features extracted from wavelet transform.
— Wavelet, ANN, Laplace Wavelet Kurtosis, Gear, Crest Factor, Shape Factor and Impulse Factor
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Isotherm Modeling on the Equilibrium Sorption Of
Cadmium(II) from Solution by Agbani Clay
Dawodu F.A, Akpomie G.K, and Ogbu I.C
Department of Chemistry (Industrial), University of Ibadan, Oyo State, Nigeria
Projects Development Institute (PRODA), Emene, Enugu, Nigeria
The main objective of this study was to remove Cadmium(II) ions from aqueous solution by adsorption unto Agbani clay as a low-cost adsorbent. The clay was used without chemical modification or treatment in order to maintain a low process cost. The effect of pH, initial Cadmium ion concentration and time were determined using batch adsorption technique. Maximum adsorption was recorded at a pH of 5.0 and equilibrium sorption was achieved within 50 minutes of the process. Equilibrium isotherm models applied showed the Freundlich isotherm model with the best regression coefficient R2 of 0.9907, followed by the Temkin isotherm, (0.9220) and the least value was obtained with the Dubinin-Radushkevich, (0.8159) and Langmuir isotherm,(0.8158) . The Langmuir isotherm constant (b) and the Freundlich constant (n) indicated a high affinity of Agbani clay for Cadmium(II) ions. A chemical adsorption process was indicated by the value of the apparent energy of adsorption (9.13KJ/mol) obtained from the Dubinin-Radushkevich isotherm. The experimental results indicated the potential of Agbani clay as a low-cost adsorbent for cadmium removal from industrial wastewaters.
— Agbani Clay, Cadmium, Equilibrium Modeling, Isotherm, Sorption and Temkin Model
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A Perspective on Whether Robot Localization Can Be Effectively Simulated by Quantum Mechanics
Yanbu University College, Royal Commission at Jubail & Yanbu, KSA
This paper is a theoretical concept that presents a perspective on whether quantum mechanics can be used for robot localization by using concepts of particle filter and quantum computation. A system is made of particles and particle filter is a sequence of algorithms for estimating a state of system. It is a way of taking variable of interest about something you are trying to measure, and whittling those guesses down by using measurements from sensors. Quantum mechanics has the power of atoms. It provides a mean of obtaining information about a system in a micro world associated with various attributes. Quantum states are linear super position of its components states and particles exist in linear combination of superposition. By using quantum power, I propose a new algorithm of particle filter and also its limitation.
— Quantum Mechanics, Particle Filter, Superposition, Quantum Computation, De-coherence, Closed System and Complex Number
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User’s Involvement in Cloud Selection Exercising Cloud Broker
Rabia Khan and Ejaz Nazir
Institute of Information Technology, KUST, Indus Highway, Off Jarma, Kohat, KPK, Pakistan
3 Grantham House, Friary Road, London, Se15 1rn, U.K
Cloud computing is the need of this era. It is the power house in the sense of demanding services, computing power, accessibility, scalability, transparency, efficiency, fault-tolerance, cost-effectiveness, interoperability, and portability. Authors have the believe, that processing power is or will be out of the scope of single processor, so need of distributed computing arose, and hence because of aforementioned properties cloud computing jumped in to give the pleasure of computing. Furthermore, it is an emerging technology and its rapidly growing span will soon make it a necessity of life. Similarly, to make strengthen this vision, authors have thought that the number of clouds that are available now or in future are huge, so how user will evaluate each of them. Since every new technology that emerges mainly focuses users so that it can prosper with user comments. Same is required in cloud computing. User involvement in cloud selection will force service providers to compete each other in providing better, cheap and fast services to users. To achieve the same purpose, cloud brokers could be used which can serve as an intermediary between service providers and users. In this paper persons responsible have made use of broker cloud to facilitate user involvement in cloud selection as per requirement accordingly.
— Broker Cloud, Agent and XMPP
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Effect of Coag-Flocculation Kinetics on Telfairia Occidentalis Seed Coagulant (TOC) in Pharmaceutical Wastewater
Ugonabo Victor Ifeanyi, Menkiti Matthew Chukwudi and Onukwuli Dominic. Okechukwu
Department of Chemical Engineering Nnamdi Azikiwe University, Awka, Nigeria
The effect of coag-flocculation kinetics on Telfairia occidentalis seed coagulant in pharmaceutical wastewater has been investigated at room temperature. Various dosages of the coagulant at different wastewater medium was used in evaluating how coag-flocculation kinetic parameters affected Telfairia occidentalis seed coagulant in pharmaceutical wastewater. Such kinetics parameters determined were coagulation reaction rate constant K, the order of reaction α, t
1 and R2
. Turbidity measurement was employed in line with turbidimetric standard method. The highest and least values for K, are 1.1282E – 01Lg min-1
; α, are 1.5 and 1.1; t
1, are 0.35 and 2.4E-04; R2
are 0.997 and 0.972, respectively. The best turbidity percentage removed is recorded at 88% for 0.6g coagulant dosage and pH of 13. Conclusively, Telfairia occidentalis is an effective bio-coagulant which can reduce the level of turbidity in pharmaceutical wastewater.
— Effect, Kinetics, Pharmaceutical Wastewater, Telfairia Occidentalis Seed and Coagulation/Flocculation
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