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Dalavi, Amol M.,Pawar, Padmakar J.,Singh, Tejinder Paul Society for Computational Design and Engineering 2016 Journal of computational design and engineering Vol.3 No.3
Optimization of hole-making operations in manufacturing industry plays a vital role. Tool travel and tool switch planning are the two major issues in hole-making operations. Many industrial applications such as moulds, dies, engine block, automotive parts etc. requires machining of large number of holes. Large number of machining operations like drilling, enlargement or tapping/reaming are required to achieve the final size of individual hole, which gives rise to number of possible sequences to complete hole-making operations on the part depending upon the location of hole and tool sequence to be followed. It is necessary to find the optimal sequence of operations which minimizes the total processing cost of hole-making operations. In this work, therefore an attempt is made to reduce the total processing cost of hole-making operations by applying relatively new optimization algorithms known as shuffled frog leaping algorithm and proposed modified shuffled frog leaping algorithm for the determination of optimal sequence of hole-making operations. An industrial application example of ejector plate of injection mould is considered in this work to demonstrate the proposed approach. The obtained results by the shuffled frog leaping algorithm and proposed modified shuffled frog leaping algorithm are compared with each other. It is seen from the obtained results that the results of proposed modified shuffled frog leaping algorithm are superior to those obtained using shuffled frog leaping algorithm.
Harale, N. S.,Dalavi, D. S.,Mali, Sawanta S.,Tarwal, N. L.,Vanalakar, S. A.,Rao, V. K.,Hong, Chang Kook,Kim, J. H.,Patil, P. S. Springer-Verlag 2018 JOURNAL OF MATERIALS SCIENCE - Vol.53 No.8
<P>A well-organized tungsten oxide (WO3) nanosheet-assembled microbricks have been synthesized by the hydrothermal route at 180 A degrees C with the help of peroxy-tungstic acid sol. The as-synthesized thin films have been characterized for structural, morphological and compositional studies by using X-ray diffraction, scanning electron microscopy and FT-Raman spectroscopy. The deposited WO3 thin films have been found to be polycrystalline in nature with the monoclinic crystal structure. The SEM micrographs revealed the formation of microbrick-like structure which was made up of two-dimensional (2D) nanosheets. The 2D nanosheets act as a nanobuilding blocks for the formation of microbricks. The gas-sensing performance of WO3 thin films was carried out for different gases, and it is observed that sensor exhibited maximum gas response towards Nitrogen dioxide (NO2) gas which is seven times higher than that of other gases at an operating temperature of 300 A degrees C over the concentration range of 5-100 ppm. WO3 microbricks sensor showed higher response about 11.5 and fast response-recovery characteristics towards NO2 gas, especially a much quicker gas response time of 16 s and recovery time of 260 s at 100 ppm.</P>
More, A. J.,Patil, R. S.,Dalavi, D. S.,Suryawanshi, M. P.,Burungale, V. V.,Kim, J. H.,Patil, P. S. Springer Science + Business Media 2017 Journal of electronic materials Vol.46 No.2
<P>Tungsten oxide (WO3) thin films have been synthesized using electrodeposition in potentiostatic mode and the effect of different deposition potentials on their structural, morphological, optical, and electrochromic (EC) properties investigated. The deposition potential versus saturated calomel electrode (SCE) was varied from -0.35 V to -0.50 V in steps of -0.05 V for 20 min each. The electrodeposited WO3 thin films were characterized using x-ray diffraction analysis, micro-Raman spectroscopy, field-emission scanning electron microscopy, and ultraviolet-visible (UV-Vis) spectrophotometry, revealing amorphous nature with nanograins having average size from 40 nm to 60 nm. The EC performance of the WO3 thin films exhibited response times of 1.35 s for bleaching (t (b)) and 3.1 s for coloration (t (c)) with excellent reversibility of 64.36%. The highest coloration efficiency of the electrodeposited WO3 thin films was found to be 87.95 cm(2)/C. The electrochemical reversibility and stability of the WO3 thin films obtained in this study make them promising for use in smart window applications.</P>