检索结果-南通市图书馆

Optimization of M/M/s/N Queueing Model with Reneging in a Fuzzy Environment

American Journal of Operations Research 2021年第3期11卷 121-140页

作者： Ananda prasad Panta ram prasad ghimire Dinesh Panthi Shankar Raj Pant Department of Mathematics Tri-Chandra Campus Tribhuvan University Kathmandu Nepal Department of Mathematics Kathmandu University Kavre Nepal Department of Mathematics Valmeeki Campus Nepal Sanskrit University Kathmandu Nepal Central Department of Mathematics Tribhuvan University Kirtipur Nepal

This paper deals with the study of multi-server queueing model in a fuzzy environment with imposition of reneging of customers. Entry of the customers in the system is assumed to be Poisson process and exponential service time distribution under first-come-first-served basis. Specific of this investigation is to derive the various fuzzy performance measures such as fuzzy queue length, fuzzy waiting time in queue, fuzzy response time and fuzzy optimal number of servers in explicit form for the finite capacity multi-server queueing system by using recursive method. For the validity of the model we have obtained the numerical illustrations in tabular form which shows that fuzzy-queue can be more realistic than crisp queue.

关键词： Fuzzy Environment Poisson Optimal Reneging

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Evaluating active leprosy case identifcation methods in six districts of Nepal

引用

Infectious Diseases of Poverty 2023年第6期12卷 105-106页

作者： ram Kumar Mahato Uttam ghimire Madhav Lamsal Bijay Bajracharya Mukesh Poudel Prashnna Napit Krishna Lama Gokarna Dahal David T.S.Hayman Ajit Kumar Karna Basu Dev Pandey Chuman Lal Das Krishna prasad Paudel Epidemiology and Disease Control Division Department of Health Services Ministry of Health and Population Kathmandu Nepal Epidemiology and Disease Control Division-Malaria Program Management Unit- SCI-GF Kathmandu Nepal Leprosy Control & Disability Management Section EPidemiology and Disease Control Division DoHS Kathmandu Nepal Lalgadh Leprosy Hospital & Service Center Nepal Leprosy Trust Lalgadh Nepal Molecular Epidemiology and Public Health Laboratory Infectious Disease Research Centre Hopkirk Research Institute Massey University Palmerston North New Zealand Center for Health and Disease Studies-Nepal Kathmandu Nepal DEJIMA Infectious Disease Research Alliance Nagasaki University Nagasaki Japan

Background Nepal has achieved and sustained the elimination of leprosy as a public health problem since 2009,but 17 districts and 3 provinces with 41%(10,907,128)of Nepal’s population have yet to eliminate the *** cases and grade-2 disabilities(G2D)indicate recent transmission and late diagnosis,respectively,which necessitate active and early case *** operational research was performed to identify approaches best suited for early case detection,determine community-based leprosy epidemiology,and identify hidden leprosy cases early and respond with prompt *** Active case detection was undertaken in two Nepali provinces with the greatest burden of leprosy,Madhesh Province(40%national cases)and Lumbini Province(18%)and at-risk prison populations in Madhesh,Lumbini and Bagmati *** detection was performed by(1)house-to-house visits among vulnerable populations(n=26,469);(2)contact examination and tracing(n=7608);in Madhesh and Lumbini Provinces and,(3)screening prison populations(n=4428)in Madhesh,Lumbini and Bagmati Provinces of *** case direct medical and nonmedical costs for each approach were *** New case detection rates were highest for contact tracing(250),followed by house-to-house visits(102)and prison screening(45)per 100,000 population ***,the cost per case identifed was cheapest for house-to-house visits[Nepalese rupee(NPR)76,500/case],followed by contact tracing(NPR 90,286/case)and prison screening(NPR 298,300/case).House-to-house and contact tracing case paucibacillary/multibacillary(PB:MB)ratios were 59:41 and 68:32;female/male ratios 63:37 and 57:43;pediatric cases 11%in both approaches;and grade-2 disabilities(G2D)11%and 5%,*** leprosy was not signifcantly diferent among household and neighbor contacts[odds ratios(OR)=1.4,95%confdence interval(CI):0.24-5.85]and for contacts of MB versus PB cases(OR=0.7,95%CI 0.26-2.0).Attack rates were not signifcantly d

关键词： Leprosy Early case detection Community-based epidemiology Hidden case New case detection rate Attack rate Cost per case identifed Nepal

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Magnetic and Electronic Structure Calculations of Rare-Earth Nitrides

引用

材料科学与工程（中英文A版） 2011年第1X期1卷 53-57页

作者： Sandeep M.P. ghimire ram Kumar Thapa Department of Physics Mizoram University Tanhril 796009 Aizawl Mizoram India Condensed Matter Physics Research Center New Horizon Institute Butwal RupendehL Nepal Faculty of Science Nepal Academy of Science and Technology Khumaltar G.P.O. 3323 Kathmandu Nepal

A broad range of applications in spintronics and spin-filtering devices are found in rare earth nitrides due to its half-metallic behaviour and high magnetic moments. We intend to study the electronic and magnetic properties of REN in the frame work of density functional theory (DFT) by using the full-potential linearized augmented plane wave (FP-LAPW) method. It was found from the computed density of states (DOS) and the band structures that the total DOS of EuN is contributed mainly by the 4f-state electrons of the Eu atom. In the case of SmN and EuN, we fill the majority spin f states and create an exchange field that is felt by the other electrons in the material whose effect is more pronounced and leads to a significant-splitting of the nitrogen p bands.

关键词：稀土氮化物电子结构计算密度全势线性缀加平面波自旋电子学磁性密度泛函理论过滤装置

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

沿海拔梯度的表型可塑性影响银胶菊叶甲的取食效率和发育

引用

昆虫学报 2020年第9期63卷 1117-1124页

作者： Daya ram BHUSAL Kishor Chandra ghimire Rekha UPADHYAY Mahadev BISTA Bhupendra KUMAR Central Department of Zoology Tribhuvan UniversityKirtipurKathmanduNepal Primary School NuawnVaranasiIndia Department of Zoology Siddha Nath Science Campus(TU)MahendranagarNepal Department of Zoology Banaras Hindu UniversityVaranasiUttar PradeshIndia

【目的】本研究旨在弄清楚生态气候因子是否影响尼泊尔银胶菊Parthenium hysterophorus盛产区中银胶菊叶甲Zygogramma bicolorata成虫后代的形态学测量参数和基础生物学。【方法】从尼泊尔Kathmandu(24℃,海拔1400 m,温带气候),Chitwan... 详细信息

【目的】本研究旨在弄清楚生态气候因子是否影响尼泊尔银胶菊Parthenium hysterophorus盛产区中银胶菊叶甲Zygogramma bicolorata成虫后代的形态学测量参数和基础生物学。【方法】从尼泊尔Kathmandu(24℃,海拔1400 m,温带气候),Chitwan(25℃,海拔415 m,热带或亚热带气候)和Mahendranagar(34℃,海拔229 m,湿润-亚热带气候)地区采集银胶菊叶甲成虫,在最适室内条件下评估各生态气候区中其F 1代4龄幼虫和雌成虫的取食特征。我们假定在自由取食和最适非生物条件下饲养的后代将不会受到食物和气温的间接影响,不管亲本属于哪一生态气候区,后代利用食物的能力一致。【结果】然而,我们发现,尽管在最适条件下饲养,银胶菊叶甲后代的体型和取食特征与其亲本相似。体型大的亲本(来自Kathmandu地区),其后代体型也大,但是其食物利用效率比体型小的亲本(来自Chitwan和Mahendranagar地区)所产后代小。这3个生态气候区中,与幼虫相比正在发育的雌成虫均表现出体重增加而食物利用效率降低。【结论】这些发现说明,食物和最适非生物条件的间接影响可能不影响银胶菊叶甲后代的表型可塑性,后代的体型和取食特征与亲本相似。发生的可遗传的变化可能是由于种内的遗传多样性。我们期望这些发现有助于理解气候变化背景下银胶菊叶甲成虫的表型可塑性、分布格局和取食行为。

关键词：银胶菊叶甲银胶菊表型可塑性生物防治取食特征气候

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：