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| 1 | Multi-objective optimization of oil well drilling using elitist non-dominated sorting genetic algorithm显示文摘A multi-objective optimization of oil well drilling has been carried out using a binary coded elitist non-dominated sorting genetic algorithm. A Louisiana offshore field with abnormal formation pressure is considered for optimization. Several multi-objective optimization problems involving two-and three-objective functions were formulated and solved to fix optimal drilling variables. The important objectives are:(i) maximizing drilling depth,(ii) minimizing drilling time and(iii) minimizing drilling cost with fractional drill bit tooth wear as a constraint. Important time dependent decision variables are:(i) equivalent circulation mud density,(ii) drill bit rotation,(iii) weight on bit and(iv) Reynolds number function of circulating mud through drill bit nozzles. A set of non-dominated optimal Pareto frontier is obtained for the two-objective optimization problem whereas a non-dominated optimal Pareto surface is obtained for the three-objective optimization problem. Depending on the trade-offs involved, decision makers may select any point from the optimal Pareto frontier or optimal Pareto surface and hence corresponding values of the decision variables that may be selected for optimal drilling operation. For minimizing drilling time and drilling cost, the optimum values of the decision variables are needed to be kept at the higher values whereas the optimum values of decision variables are at the lower values for the maximization of drilling depth. | Chandan Guria Kiran K Goli Akhilendra K Pathak | 2014 | Petroleum Science2014，11，1： | 10 |
| 2 | Combustion characteristics of diesel HCCI engine: An experimental investigation using external mixture formation technique显示文摘 | Akhilendra Pratap Singh Avinash Kumar Agarwal | 2012 | Applied Energy2012，，： | 1 |
| 3 | Fatigue crack growth simulations of 3-D linear elastic cracks under thermal load by XFEM显示文摘This paper deals with the fatigue crack growth simulations of three-dimensional linear elastic cracks by XFEM under cyclic thermal load. Both temperature and displacement approximations are extrinsically enriched by Heaviside and crack front enrichment functions. Crack growth is modelled by successive linear extensions, and the end points of these linear extensions are joined by cubic spline segments to obtain a modified crack front. Different crack geometries such as planer, non-planer and arbitrary spline shape cracks are simulated under thermal shock, adiabatic and isothermal loads to reveal the sturdiness and versatility of the XFEM approach. | Himanshu PATHAK Akhilendra SINGH I.V. SINGH S. K. YADAV | 2015 | Frontiers of Structural and Civil Engineering2015，9，4： | 1 |
| 4 | Development of port fuel injected methanol(M85)-fuelled two-wheeler for sustainable transport显示文摘Due to increasingly stringent environmental pollution norms,there is a need for alternate combustion techniques and alternate fuels to keep up with changing trends.One of the viable solutions for India is the adaptation of methanol as a fuel for automotive sector.Therefore,in this study a functional two-wheeler prototype was developed,which uses M85(85%v/v methanol and 15%v/v gasoline)in an electronic control unit(ECU)controlled port fuel injected(PFI)engine.This study included comparative investigations of simulated on-road two-wheeler performance on chassis dynamometer using a gasoline-fuelled motorcycle with stock ECU vis-a-vis M85-fuelled motorcycle using recalibrated ECU.ECU recalibration exhibited that M85-fuelled vehicle was operated at relatively more advanced spark timing compared to baseline gasoline-fuelled vehicle.Performance results showed that M85-fuelled motorcycle produced relatively higher engine power and higher maximum vehicle speed compared to gasoline-fuelled motorcycle.Relatively superior acceleration characteristics(especially at higher speeds)of M85-fuelled motorcycle was another important finding of this study,indicating that M85 provided superior throttle response compared to gasoline.Comparative analysis of raw tailpipe emissions showed that modified M85-fuelled motorcycle emitted relatively higher hydrocarbon(HC),carbon monoxide(CO)and oxides of nitrogen(NO_x)emissions compared to stock gasoline-fuelled motorcycle.However,these emissions can be controlled by using adaptation of suitable after-treatment systems. | Tushar Agarwal Akhilendra Pratap Singh Avinash Kumar Agarwal | 2020 | Journal of Traffic and Transportation Engineering(English Edition)2020，7，3： | 1 |
| 5 | Water quality management for the Talkatora Lake, Jaipur-a case 显示文摘 | Gupta Akhilendra B | 1999 | Water Science and Technology1999，40，2： | 1 |
| 6 | Fatigue crack growth simulations of 3-D programs using XFEM显示文摘 | Himanshu P Akhilendra S Indra V S | 2013 | International Journal of Mechanical Sciences2013，76，11： | 1 |
| 7 | Quercetin Regresses Dalton’s Lymphoma Growth via Suppression of PI3K/AKT Signaling Leading to Upregulation of p53 and Decrease in Energy Metabolism显示文摘 | Akhilendra Kumar Maurya Manjula Vinayak | 2015 | Nutrition and Cancer2015，，2： | 1 |
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