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Transportation Problem with Multi-choice Cost and Demand and Stochastic Supply

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Journal of the Operations Research Society of China 2016年第2期4卷 193-204页

作者： sankar Kumar Roy Department of Applied Mathematics with Oceanology and Computer Programming Vidyasagar UniversityMidnaporeWest Bengal 721102India

This paper analyzes the multi-choice stochastic transportation problem where the cost coefficients of the objective function and the demand parameters of the constraints follow multi-choice *** that the supply parameters of the constraints in a transportation problem(TP)follow logistic *** main objective of this paper is to select an appropriate choice from the multi-choices for the cost coefficients of the objective function and the demand of the constraints in the TP by introducing Lagrange’s interpolating polynomial in such a way that the total cost is minimized and satisfies the required *** stochastic programming,the stochastic supply constraints of the TP are transformed into deterministic ***,a non-linear deterministic model is *** Lingo software,the optimal solution of the proposed problem is *** illustrate the methodology,a real-life problem on the TP is considered.

关键词： Transportation problem Multi-choice programming Lagrange’s interpolating polynomial Stochastic programming

Quaternary tectonic control on channel morphology over sedimentary low land:A case study in the Ajay-Damodar interfluve of Eastern India

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Geoscience Frontiers 2015年第6期6卷 927-946页

作者： Suvendu Roy Abhay sankar Sahu Department of Geography University of Kalyani

The style of active tectonic on the deformation and characterization of fluvial landscape has been investigated on three typical skrike-slip fault zones of the Ajay-Damodar Interfluve（ADI） in Eastern India through field mapping,structural analysis and examination of digital topography（ASTER-30 m）,multispectral imageries,and Google Earth images,Channel morphology in Quaternary sediment is more deformed than Cenozoic lateritic tract and igneous rock system by the neotectonic activities,The structural and lithological controls on the river system in ADI region are reflected by distinct drainage patterns,abrupt change in flow direction,offset river channels,straight river lines,ponded river channel,marshy lands,sag ponds,palaeo-channels,alluvial fans,meander cutoffs,multi-terrace river valley,incised compressed meander,convexity of channel bed slope and knick points in longitudinal profile,Seven morphotectonic indices have been used to infer the role of neotectonic on the modification of channel morphology,A tectonic index map for the ADI region has been prepared by the integration of used morphotectonic indices,which is also calibrated by Bouguer gravity anomaly data and field investigation.

关键词： Active tectonic Skrike-slip fault Channel morphology Morphotectonic indices Neotectonic map

Effectiveness of basin morphometry, remote sensing, and applied geosciences on groundwater recharge potential mapping： a comparative study within a small watershed

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Frontiers of Earth Science 2016年第2期10卷 274-291页

作者： Suvendu ROY Abhay sankar SAHU Department of Geography University of Kalyani Kalyani Nadia-741235 West Bengal India

A multidisciplinary approach using the inte- grated field of geosciences （e.g., geomorphology, geotec- tonics, geophysics, and hydrology） is established to conduct groundwater recharge potential mapping of the Kunur River Basin, India. The relative mean error （RME） calculation of the results of three applied techniques and water table data from twenty-four observation wells in the basin over the 2000-2010 period are presented. Nine sub- basins were identified and ranked for the RME calculation, where the observation wells-based ranking was taken as standard order for comparison. A linear model has been developed using six factors （drainage density, surface slope, ruggedness index, lineament density, Bouguer gravity anomaly, and potential maximum water retention capacity） and a grid-wise weighted index. In a separate comparative approach, the sub-basin and grid-wise analyses have been conducted to identify the suitable spatial unit for watershed level hydrological modeling.

关键词： groundwater basin morphometry SCS curvenumber geosciences geoinforrnatics

Multi-Objective Modified Particle Swarm Optimization for Test Suite Reduction(MOMPSO)

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Computer Systems Science & Engineering 2022年第9期42卷 899-917页

作者： U.Geetha Sharmila sankar Department of Information Technology B.S.Abdur Rahman Crescent Institute of Science and TechnologyChennai600048India Department of Computer Science and Engineering B.S.Abdur Rahman Crescent Institute of Science and TechnologyChennai600048India

Software testing plays a pivotal role in entire software development *** provides researchers with extensive opportunities to develop novel methods for the optimized and cost-effective test suite Although implementation of such a cost-effective test suite with regression testing is being under exploration still it contains lot of challenges and flaws while incorporating with any of the new regression testing algorithm due to irrelevant test cases in the test suite which are not *** kinds of irrelevant test cases might create certain challenges such as code-coverage in the test suite,fault-tolerance,defects due to uncovered-statements and overall-performance at the time of *** this objective,the proposed a new Modified Particle Swarm optimization used for multi-objective test suite *** experiment results involving six subject programs show that MOMPSO method can outer perform with respect to both reduction rate(90.78%to 100%)and failure detection rate(44.56%to 55.01%).Results proved MOMPSO outperformed the other stated algorithms.

关键词： Regression testing test suite reduction test case generation

A Review on Surface Stress-Based Miniaturized Piezoresistive SU-8 Polymeric Cantilever Sensors

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Nano-Micro Letters 2018年第2期10卷 198-238页

作者： Ribu Mathew A.Ravi sankar School of Electronics Engineering (SENSE) Vellore Institute of Technology (VIT) Chennai

In the last decade, microelectromechanical systems(MEMS) SU-8 polymeric cantilevers with piezoresistive readout combined with the advances in molecular recognition techniques have found versatile applications,especially in the field of chemical and biological *** to conventional solid-state semiconductor-based piezoresistive cantilever sensors, SU-8 polymeric cantilevers have advantages in terms of better sensitivity along with reduced material and fabrication cost. In recent times,numerous researchers have investigated their potential as a sensing platform due to high performance-to-cost ratio of SU-8 polymer-based cantilever sensors. In this article, we critically review the design, fabrication, and performance aspects of surface stress-based piezoresistive SU-8 polymeric cantilever sensors. The evolution of surface stress-based piezoresistive cantilever sensors from solid-state semiconductor materials to polymers, especially SU-8 polymer, is discussed in detail. Theoretical principles of surface stress generation and their application in cantilever sensing technology are also devised. Variants of SU-8 polymeric cantilevers with different composition of materials in cantilever stacks are explained. Furthermore, the interdependence of the material selection, geometrical design parameters, and fabrication process of piezoresistive SU-8 polymeric cantilever sensors and their cumulative impact on the sensor response are also explained in *** addition to the design-, fabrication-, and performancerelated factors, this article also describes various challenges in engineering SU-8 polymeric cantilevers as a universal sensing platform such as temperature and moisture vulnerability. This review article would serve as a guideline for researchers to understand specifics and functionality of surface stress-based piezoresistive SU-8 cantilever sensors.

关键词： SU-8 polymer Surface stress Biological sensor Cantilever Chemical sensor Piezoresistor Immobilization

Evaluation of regression algorithms for estimating leaf area index and canopy water content from water stressed rice canopy reflectance

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Information Processing in Agriculture 2021年第2期8卷 284-298页

作者： Niranjan Panigrahi Bhabani sankar Das Agricultural and Food Engineering Department Indian Institute of Technology KharagpurWest Bengal 721302India School of Water Energy and EnvironmentCranfield UniversityCranfield MK430ALUK

Optical remote sensing(RS)with robust algorithms is needed for accurate assessment of crop canopy *** intensive studies on algorithms,their performance using RS needs to be *** evaluated five different algorithms(partial-least-squares regression(PLSR),support vector regression(SVR),random forest regression(RFR),locally-weighted-PLSR(PLSRLW)and PLSR with feature selection(PLSRFS))for rapid assessment of leaf area index(LAI)and canopy water content(CWC)for rice canopies using canopy reflectance spectra over visible to short-wave infrared *** pooled datasets of LAI(600)and CWC(480)were collected from two replicated field experiments during 2014–15 and 2015–16 rice growing *** performance of each algorithm was evaluated using coefficient of determination(R^(2)).Results showed that PLSRLW performed more accurately than other algorithms with R^(2) values 0.77 and 0.66 for LAI and CWC,*** also used a bootstrapping approach to generate a kernel density estimator of root mean squared error values for each *** results suggested that the improvement in prediction accuracy of LAI and CWC can be achieved if a suitable algorithm is selected by assigning higher weights to calibration samples,which has similar canopy structure as the test *** of the canopy spectral data results large error values in test dataset,therefore the use of entire season canopy spectral data should be used for model calibration.

关键词： Rice canopy Reflectance spectroscopy Calibration Retrieval algorithms Partial-least-squares regression

A study of clock effects in Newton-Maxwell formalism

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Geodesy and Geodynamics 2020年第1期11卷 72-77页

作者： sankar Hajra Indian Physical Society 2A and 2B Raja S.C.Mullick RoadKolkata700032India

Many measurements on the time gain/loss of the atomic clocks orbiting the spinning Earth have been *** time gain/loss of the atomic clocks orbiting the spinning Earth is called gravitomagnetic clock *** effects have been well studied from the consideration of the relativity theory and the effects are thought to be relativistic ***,no studies has been done from the physics of Newton and the electrodynamics of *** this paper,we have studied clock effects from Newton-Maxwell consideration and have shown that clock effects could be considered as simple consequences of Newton’s physics and Maxwell’s electrodynamics.

关键词： Clock effect Electrodynamics Gravitation Coriolis effect

Combinatorial effect of diclofenac with piperine and D-limonene on inducing apoptosis and cell cycle arrest of breast cancer cells

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Asian Pacific Journal of Tropical Biomedicine 2023年第2期13卷 80-92页

作者： Srivarshini sankar Gothandam Kodiveri Muthukaliannan School of Bio Sciences and Technology Vellore Institute of TechnologyVelloreTamil NaduIndia

Objective:To investigate the potential synergistic activity of diclofenac with piperine and D-limonene in inducing apoptosis and cell cycle arrest in breast cancer MCF-7 ***:Molecular docking study was conducted to evaluate the binding affinity of diclofenac with piperine and D-limonene against p53,Bax,and *** MTT assay was used to determine IC50,and the Chou-Talay method was used to determine the synergistic concentration of the combination treatment of diclofenac plus piperine and diclofenac plus *** detection,cell cycle arrest,reactive oxygen species production,and mitochondrial membrane potential were also ***:Diclofenac,piperine,and D-limonene showed potent binding affinity for p53,Bax,and *** plus piperine and diclofenac plus D-limonene enhanced the formation of reactive oxygen species,which also had an effect on the mitochondrial membrane’s integrity and caused DNA *** plus piperine and diclofenac plus D-limonene arrested the cells in the sub-G0phase while drastically lowering the percentage of cells in the G2/M ***,the elevated apoptosis in the combined therapy was confirmed by annexin V/propidium iodide ***:The combined therapy prominently enhanced the antiproliferative and apoptotic effects on MCF-7 cells compared with treatment with diclofenac,piperine,and D-limonene alone.

关键词： Breast cancer Diclofenac sodium Piperine D-limonene Reactive oxygen species Cell cycle arrest Apoptosis

The Flight Dynamics of Tapejara,a Pterosaur From the Early Cretaceous of Brazil with a Large Cranial Crest

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Acta Geologica Sinica(English Edition) 2012年第6期86卷 1377-1388页

作者： sankar CHATTERJEE R.Jack TEMPLIN Department of Geosciences Museum of Texas Tech University Aerodynamic Laboratory National Research Council

Tapejara wellnhoferi, a small azhdarchoid pterodactyloid from the Early Cretaceous Santana Formation of Brazil, provides critical information about the aerodynamic function of its spectacular head crest. The cranial crests in pterodactyloids were sexually dimorphic and are thought to have evolved in adult males in response to female mate choice. However, the location of cranial crests in front of the center of gravity would create instability in the yaw axis during flight and may seem like a handicap. Vertically aligned webbed feet probably suppressed the yawing rotations and instability from the crest. Here we show that the crest functioned as a front rudder to make agile turn and mediate flight control. A computer simulation model suggests that Tapejara had a large excess of muscle power available above the power required for continuous flapping flight. It could easily takeoff from a perch, ground, or water surface and land safely on the ground. It was an excellent glider with a gliding angle close to 4~ and a cruising speed of 27 km/h. Tapejara could soar efficiently on the windward side of cliffs or circle on rising thermals over tropical waters for efficient long-distance flight. Various control surfaces in the wings of Tapejara analogous to the slat, aileron, elevator, fin, rudder, and horizontal stabilizer of an aircraft made pterodactyloids versatile flyers.

关键词： Tapejara Cretaceous pterodactyloids cranial crest flight Brazil