https://ir.vidyasagar.ac.in/jspui/handle/123456789/308 2026-04-25T23:36:43Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/825 Title: The EB Estimation of Scale-parameter for Twoparameter Exponential Distribution Under the Type-I Censoring Life Test Authors: Shi, Yimin; Yan, Weian Abstract: This paper is devoted to the estimation of scale-parameter for two-parameter exponential distribution using empirical Bayes procedure. Under the type-I censoring life test, we first choose the prior distribution of the scale-parameter and find its Bayes estimation, and then we use maximum likelihood method to obtain the estimation of the super-parameter which is included in the prior distribution. finally, the empirical estimation of Scale-parameter is derived from current samples. Moreover, an illustrative example is examined numerically by means of the Monte- Carlo simulation, and this shows that such EB estimation is simple and efficient Description: 25-30 2010-01-01T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/824 Title: Flow through a Rotating Curved Square Duct: The Case of Positive Rotation Authors: Mondal, R N; Islam, M R; Uddin, M S; Datta, A.K Abstract: In this paper, a comprehensive numerical study is presented for the flow characteristics through a rotating curved duct with square cross section. Numerical calculations are carried out by using a spectral method and covering a wide range of the Taylor number 0 ≤ Tr ≤ 3000 for two cases of the Dean numbers, Case I: Dn =1000 and Case II: Dn = 2000 . A temperature difference is applied across the vertical sidewalls for the Grashof numberGr = 500 , where the outer wall is heated and the inner one cooled. In this paper, the positive rotation of the duct about the center of curvature is imposed, and the effects of rotation (Coriolis force) on the flow characteristics are investigated. As a result, multiple branches of asymmetric steady solutions with two-, three- and four-vortex solutions are obtained. Time evolution calculations as well as phase spaces of the unsteady solutions are obtained, and it is found that in the unstable region the flow undergoes in the scenario “periodic → chaotic → multi-periodic → periodic → steady-stable”, if Tr is increased. Description: 145-163 2010-01-01T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/823 Title: Low-Voltage CMOS Balanced Output Current Conveyor with Rail-to-Rail Input Stage Authors: Maiti, Saikat; Pal, Radha Raman Abstract: In this paper, a new CMOS low-voltage balanced output second generation current conveyor (BOCCII) with rail-to-rail input stage is proposed. The rail-to-rail operation can be achieved by placing an n-channel and a p-channel differential input pair connected in parallel. PSpice simulations of the proposed balanced output current conveyor are given using 0.25μm CMOS technology and ±1.2V supply voltage to verify the results. The balanced output current conveyor exhibits a wide dynamic input range and a voltage transfer bandwidth of nearly 31.2MHz. Description: 247-253 2010-01-01T00:00:00Z https://ir.vidyasagar.ac.in/jspui/handle/123456789/821 Title: Rose-like SnO2 Nanostructures Synthesized via Facile Solvothermal Technique and their Optical Properties Authors: Anandan, K; Rajendran, V Abstract: Rose-like SnO2 nanostructures was successfully synthesized by using ethylenediamine as both an alkali and ligand via solvothermal technique. Quantum size nanocrystalline (2.25nm) was calculated and conformed by XRD and TEM analysis. Rose-like morphology was observed by SEM analysis. The quantum confinement effect was occurred by UV-vis spectroscopy. Room-temperature photoluminescence was carried out and investigated. The growth mechanism of the products is also discussed. The results show that the products have a rose-like SnO2 nanostructure and consist of lot of tiny nanocrystalline, which are good candidates for gas sensor, solar cell and optoelectronic devices. Description: 227-234 2010-01-01T00:00:00Z