检索结果-南通市图书馆

Finite Capacity Service System with Partial Server Breakdown and Recovery Policy:An Economic Perspective

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science and Systems Engineering 2024年第6期33卷 651-681页

作者： Shreekant Varshney Suman Kaswan Mahendra Devanda.chandra Shekhar Department of Mathematics School of TechnologyPandit Deendayal Energy UniversityGandhinagarGujarat382426India Department of Mathematics Birla Institute of Technology and Science PilaniPilani CampusPilaniRajasthan333031India Department of Mathematics Maharaja Surajmal Brij UniversityBharatpurRajasthan321201India

Developing a comprehensive service strategy to optimize customer satisfaction presents an ongoing challenge for effective facility *** essence of comprehensive systems is selecting the suitable service design,establishing an effective service delivery process,and building continuous *** research analyzes a finite capacity service system incorporating several realistic customer-server dynamics:customer impatience,server’s partial breakdown,and threshold recovery *** the number of customers is more,the server is under pressure to increase the service rate to mitigate the service system’s *** from this fact,the concept of service pressure condition is also *** characterization,we evaluate state probabilities derived using the matrix-analytic method and henceforth several performance *** address the cost optimization problem involving the developed Chapman-Kolmogorov forward differential-difference equations and determine optimal operational parameters,we employ the recently devised cuckoo search(CS)optimization approach.A comparative analysis is performed with the semi-classical optimizer:quasi-Newton(QN)method,and metaheuristics technique:particle swarm optimization(PSO),to validate the efficacy of ***,several numerical illustrations are depicted in different tables and graphs to understand essential characteristics quickly.

关键词： Customer impatience service pressure condition partial server breakdown threshold-based recovery policy Cuckoo search particle swarm optimization quasi-Newton

Studies on seasonal fluctuation of different indices related to filarial vector,Culex quinquefasciatus around foothills of Susunia of West Bengal,India

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2010年第9期3卷 727-730页

作者： Manas Paramanik Goutam chandra Mosquito & Microbiology Research Units Parasitology LaboratoryDepartment of ZoologyThe University of BurdwanBurdwan-713104West BengalIndia

Objective:To collect information on the seasonal activity of filarial vector around foothills of Susunia of West Bengal,***:Indoor-resting mosquitoes were collected from the human habitations of 16 *** mosquitoes were identified and examined for different parameters following standard methods recommended by World Health Organization and pioneer ***:Overall man hour density,infection rate,infectivity rate,human blood index and daily mortality rate of the vector were assessed as 10.54%,6.31%,1.38%,77.33%and 13.00%, respectively,which were 12.17%,8.63%,2.26%,100.00%and 17.00%,respectively in the summer *** load of microfilaria,1st stage,2nd stage and 3rd stage larvae of Wuchereria bancrofti in infected vectors were 10.***.7.50,5.56 and 4.68,respectively,which were 11.58,9.90. 6.27 and 5.44,respectively in *** the searched shelters 63.37%,8.16%and 2.08% were found to be invaded by any vector,infected vector and infective vector,respectively,which were 68.75%,12.76%and 3.91%,respectively in ***:Different indices related to the vector were much higher in summer,which indicates that,summer is the most favorable season for transmission of lymphatic filariasis in the study *** data will help to formulate an effective vector control measure.

关键词： Seasonal fluctuation Vector indices Culex quinquefasciatus Filarial vector

p53:updates on mechanisms,biology and therapy(Ⅰ)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Molecular Cell Biology 2019年第4期11卷 185-186页

作者： chandra S.Verma Bioinformatics Institute Agency for ScienceTechnology and Research(A*STAR)Singapore 138671 Department of Biological Sciences National University of SingaporeSingapore 117543 School of Biological Sciences Nanyang Technological UniversitySingapore 637551

In July 2017,the 17th International p53 Workshop was held in *** an attendanee of over 300 scientists from all over the world,the meeting was an outstanding success and many new observations about the p53 pathway were discussed for the first *** enthusiasm to gather these in sights into a form that would be available to the whole community led us and the editors of Journal of Molecular Cell Biology to design a special issue of the journal composed of articles and commentaries from some of the key contributors to the meeting.

关键词： p53 mechanisms biology and therapy

Mosquito larvicidal activity of Rauvolfia serpentina *** against Culex quinquefasciatus Say

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2012年第1期5卷 42-45页

作者： Dipanwita Das Goutam chandra Mosquito and Microbiology Research Units Parasitology LaboratoryDepartment of ZoologyBurdwan UniversityWest Bengal713104India

Objective:To establish the larvicidal activities,if any of solvent extracts of Rauvolfia serpentina (***) *** against Culex quinquefasciatus(***) Say.1823 as target ***:Seeds of *** were extracted with five solvents graded according to the polarity[*** ***,ethyl acetate,acetone and absolute alcohol] continuing one after another with the same ***:Mortality rate with petroleum ether extract was significantly higher than other *** mortality rates of late 3rd instar larvae wore 50.33±5.***.10.00±1.***.0.00±0.***.21.33±1.53 and 0.00±0.00 in 100 ppm concentration of petroleum ether,benzene,ethyl acetate,acetone and absolute alcohol respectively,after 24 h of exposure ***:Results of this study show that petroleum ether extract of R. serpentina seed may be considered as a potent source of mosquito larvicidal agent.

关键词： Mosquito larvicide Rauvolfia serpentine Seeds Culex quinquefasciatus

Vertical impedance functions of pile groups under low-to-high loading amplitudes:numerical simulations and experimental validation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Engineering and Engineering Vibration 2023年第3期22卷 647-666页

作者： Usama Zafar chandra Shekhar Goit Masato Saitoh Riku Fukuda School of Science and Engineering Saitama University255 Shimo-OkuboSaitamaJapan

Piles in a group experience additional displacements in soil due to pile-to-pile interactions apart from those resulting from the external *** effect of these interactions determined assuming soil as an elastic and/or viscoelastic material on pile head impedance functions of the pile group is studied by relating the group stiffness to the static stiffness of a single ***,the prevailing elastic solutions may misestimate the resulting pile group response due to the lack of consideration for either soil(material)and/or soil-pile interface *** is well established that soil behaves nonlinearly under moderate-to-high loading amplitudes,and besides,the soil-pile interface nonlinearity can exist even at small loading *** study addresses the effects of these nonlinearities on the vertical impedance functions of a 3×3-pile group using numerical methods by direct analyses and superposition using pile-to-pile interaction *** numerical results are validated using scaled model tests under 1 g *** results highlight the overestimation of pile-to-pile interactions in the pile group when assuming elastic soil *** cases either by direct analyses or superposition approach involving soil and soil-pile interface nonlinearities agree well with the experimental pile group responses under close-to-elastic and nonlinear conditions.

关键词： impedance functions numerical simulations model-scale experiment superposition approach soil-pile interface nonlinearity

On the applicability of various levels of detail for occupant behavior representation and modeling in building performance simulation

在线全文

学校读者我要写书评

暂无评论

Building Simulation 2023年第8期16卷 1481-1498页

作者： Jeetika Malik Handi chandra Putra Kaiyu Sun Tianzhen Hong Building Technology and Urban System Division Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA

Occupant behavior(OB)is one of the significant sources of uncertainty in building performance *** OB modeling has received increased attention in the past decade,research on the degree of granularity or level of detail(LoD)required for representing occupants is still in the nascent *** paper analyzes the modeling and applicability of three LoDs to represent occupants in building performance assessment.A medium-sized prototype office building located in Chicago,Illinois is used as the simulation case *** occupant-centric attributes are adopted to develop the LoDs for OB *** first demonstrate the different modeling approaches required for simulating the three fidelity ***,we illustrate the suitability of the developed LoDs in supporting six building performance use cases across different lifecycle *** study intends to provide guidance for the building simulation community on appropriate OB representation to support various use cases.

关键词： occupant behavior agent-based modeling building performance simulation level of detail fit-for-purpose office buildings

An account of the strategies to enhance the water splitting efficiency of noble-metal-free electrocatalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2021年第8期30卷 160-190,I0005页

作者： Subhasis Shit Saikat Bolar Naresh chandra Murmu Tapas Kuila Surface Engineering&Tribology Division Council of Scientific and Industrial Research-Central Mechanical Engineering Research InstituteMahatma Gandhi AvenueDurgapur 713209India Academy of Scientific and Innovative Research(AcSIR) CSIR-Human Resource Development Centre(CSIR-HRDC)CampusPostal Staff College AreaSector 19Kamla Nehru NagarGhaziabad 201002India

The electrolysis of water for hydrogen generation has shown immense promise as an energy conversion technology for the green energy *** concurrently occurring electrochemical reactions in water electrolysis(hydrogen and oxygen evolution reactions)are sluggish in nature and therefore the employment of electrocatalysts is highly ***-metal-based electrocatalysts(Pt,Ru O_(2),Ir O_(2),etc.)have shown superior activity towards these ***,their lower natural abundance and inferior stability make the cost to performance ratio of water electrolysis too ***,huge amount of research efforts are being carried out to develop electrocatalysts consisting of earth abundant elements(transition metals,carbon etc.)as the replacement of these noble-metal-based *** metal compounds,carbonaceous and hybrid materials have shown promise as efficient electrocatalysts but there is still huge gap between the activities of these materials and the noble-metal-based *** strategies like morphology modulation,elemental doping,defect engineering *** being deployed to enhance the activity of these noble-metal-free *** review summarizes these strategies and thoroughly discusses the reason behind the changes in activity of the electrocatalysts owing to these ***,the remaining research gaps and future prospects in this field are also discussed in detail.

关键词： Water splitting Electrocatalyst Morphology Doping Defect engineering Phase engineering

An Efficient Tide-Surge Interaction Model for the Coast of Bangladesh

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2020年第1期34卷 56-68页

作者： M.Mizanur RAHMAN Gour chandra PAUL Ashabul HOQUE Department of Mathematics Shahjalal University of Science&TechnologySylhet 3114Bangladesh Department of Mathematics University of RajshahiRajshahi-6205Bangladesh

The numerical method of lines(MOLs)in coordination with the classical fourth-order Runge Kutta(RK(4,4))method is used to solve shallow water equations(SWEs)for foreseeing water levels owing to the nonlinear interaction of tide and surge accompanying with a storm along the coast of *** SWEs are developed by extending the body forces with tide generating forces(TGFs).Spatial variables of the SWEs along with the boundary conditions are approximated by means of finite difference technique on an Arakawa C-grid to attain a system of ordinary differential equations(ODEs)of initial valued in time,which are being solved with the aid of the RK(4,4)*** grid technique is adopted to solve coastal complexities closely with least computational cost.A stable tidal solution in the region of our choice is produced by applying the tidal forcing with the major tidal constituent M2(lunar semi-diurnal)along the southern open-sea boundary of the outer *** experimentations are carried out to simulate water levels generated by the cyclonic storm AILA along the coast of *** model simulated results are found to be in a reasonable agreement with the limited available reported data and observations.

关键词： Bangladesh coast shallow water equations method of lines tide-surge interaction islands tide generating forces inverse barometer

Assessment of SNP and InDel Variations Among Rice Lines of Tulaipanji x Ranjit

在线全文

学校读者我要写书评

暂无评论

Rice science 2017年第6期24卷 336-348页

作者： Subhas chandra ROY Vijaya Bhasker REDDY LACHAGARI Plant Genetics & Molecular Breeding Laboratory Department of Botany University of North Bengal Siliguri 734013 India AgriGenome Labs Private Limited Hyderabad 500078 India

Genotyping by sequencing(GBS) is the recent approach of next-generation sequencing technique for discovering and genotyping single nucleotide polymorphisms(SNPs) in crop species. Genotypic variation studies(SNPs and insertion-deletions/In Dels) were performed using four rice lines based on GBS data by aligning to the reference genome Nipponbare. Local aromatic rice landrace Tulaipanji was crossed with Ranjit, and two distinct lines were identified from the progenies: one line with awns and aroma traits and the other without awns and aroma. Total number of SNPs and In Dels identified were 52 810 and 4 327 at read depth 10, respectively. Out of the total polymorphic SNPs/In Dels, 16 490 were intergeneric, 7 812 were inside gene, and 4 435 were intronic. Phylogenetically, Tulaipanji was closer to the reference genome nipponbare. Based on recurrent parent genome analysis, out of 10 013 alleles, 92.52% was introgressed into progeny-awn from Tulaipanji and 7.48% from Ranjit, whereas progeny-awnless carried 89.19% alleles from Ranjit and only 10.81% alleles from Tulaipanji. In addition, progeny-awn was the highest heterozygous(83.88%) and progeny-awnless was the least(2.24%) at this fifth generation of recombinant inbred lines. These SNP variations may be linked to the phenotypic traits and can be utilized in crop improvement through linkage mapping. These results suggest that adding a high density of SNP markers to a mapping or breeding population through GBS has a great value for numerous applications in rice breeding and genetics research.

关键词： rice genotyping by sequencing insertion-deletion genomic introgression single nucleotide polymorphism awn aroma heterozygous