检索结果-南通市图书馆

A Survey of the Use of the discrete-event simulation in Manufacturing Industry

厦门大学学报（自然科学版） 2002年第S1期41卷 193-195页

作者： Arne Ingemansson Gunnar S Bolmsj Ulrika Harlin Department of Mechanical Engineering Lund UniversityDepartment of Mechanical Engineering Lund UniversityIVF Industrial Research and Development Corporation Mlndal SwedenSwedenSweden

In this work, a survey of companies has been produc ed from a questionnaire and in-depth inter-views. The aimof the paper is to give a current view of the use of DES (discrete- event simulation) in the indust ry. The companies have been selected in a wide range in e.g. size, capital turno ver and employees. The survey was restricted to Sweden, although the results may be applicable to other countries with similar industrial structure. Some of the companies investigated are also multinational with branches around the world. T o illustrate the differences in production systems different sectors have be en investigated, e.g. the manufacturing industry and energy sector. The manufact uring systems generally differ in that the energy sector is more known for high reliability in their systems and the manufacturing sector tends to work more wit h lean production. Previous surveys of manufacturing efficiency illustrate different aspects. Accor ding to one survey, more than one-third (34%) of the disturbances in two countr ies (the U.S. and Finland) were mainly caused by design-based errors and flaws. The survey also showed the scope of safety problems experienced in the implemen tation and use of flexible manufacturing systems (Jrvinen et al., 1996). Another survey in Germany reports a gap between users and non-users of DES. Man y companies that are not familiar with simulation are not aware of its benefits. The study suggested integrating simulation into the planning processes as a reg ular tool. So far, DES is mostly used in system planning, resource planning and scheduling and production planning (Hirschberg & Heitmann, 1997). The disposition of the accomplished questionnaire had been multiple-choice ques tions in a strict order. The respondents gave their views on what the interviewe r considered relevant for the survey. The questionnaire was mailed to 220 person s in May 2001; a second round for unanswered surveys was dispatched in August 20 01. Replies came from 114 r

关键词： discrete-event simulation manufacturing systems disturbances productivity improvement

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

Object-oriented World-view for discrete-event simulation Modelling

引用

Systems Science and Systems Engineering 1996年第4期6卷 411-416页

作者： LIN Jian(The Management School Beijing University of Aeronautics & Astronautics Beijing 100083 China)

Object-oriented world-view provides a natural and powerful paradignl for expressing system elements and their dynamic behaviour for discrete-event simulation. simulation gives the critical ability to study the dynamic behaviour of the models that are defined with object-voriented means. This paper first examines the ways of applying the object-oriented world-view to three major discrete simulation modelling approaches, then considers the process and merits of object-oriented simulation modelling.

关键词： Object orientation discrete-event simulation object-oriented modelling

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

Comparison of alternative route selection strategies based on simulation optimization

引用

Chinese Journal of Aeronautics 2016年第6期29卷 1749-1761页

作者： Ye Bojia Lance Sherry Chen Chun-Hung Tian Yong National Key Lab of Air Traffic Flow Management Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Civil Aviation Nanjing University of Aeronautics and AstronauticsNanjing 210016China Center for Air Transportation Systems Research Department of Systems Engineering&Operations ResearchGeorge Mason UniversityFairfaxVA22030USA

Air traffic flow management(ATFM) is a collaborative process between the airspace provider and the airspace users. The result of the collaboration should be an outcome that maximizes the utility of the system without excessively penalizing any of the agents. This paper develops a discrete-event simulation model which consists of aggregate departure/arrival airports, flight routes, and sectors for evaluating the alternative collaborative route selection strategy. Given the different perspectives from air traffic control center(ACC) and airlines, eight performancemetrics and five alternative route selection strategies represent the past, current and proposed air traffic flow management operations that were evaluated. The Monte Carlo method combined with the Optimal Computing Budget Allocation(OCBA) simulation optimization technique is employed to assess the performance of different strategies. A case study of the upper air routes in central and southern China shows that the proposed model can be readily implemented to simulate different kinds of air traffic flow management strategies and predict the effect of changes on the airspace system. It also shows that the proposed alternative collaborative route selection strategy is an effective way in alleviating the en-route traffic congestion.

关键词： Air traffic control Decision support systems discrete-event simulation Monte Carlo methods OCBA

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

Estimating optimal substitution scale of urban gasoline taxis by electric taxis in the era of green energy:a case study of Zhengzhou City

引用

Geo-Spatial Information Science 2023年第3期26卷 514-539页

作者： Zhixiang Fang Xiaofan Wang Ying Zhuang Xianglong Liu State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina Key Laboratory of Advanced Public Transportation Science China Academy of Transportation SciencesBeijingChina

Electric Taxis(ETs)are the most favored alternatives to Gasoline Taxis(GTs)in cities that aim to reduce environmental *** to develop a reasonable scale on which GTs are substituted by ETs remains a challenge to governments due to the dynamics and complexity of the taxi *** address this challenge,this paper develops a discrete-event-based simulation framework to simulate participants in the system and estimate the results under different substitution scales,which are helpful to understanding the status changing law of entities under different substitution scales,such as the operating indices of ETs,the unsatisfied travel requirements of passengers,and the usage state of charging *** framework abstracts the behavioral process of ETs into three elements,namely,entity,behavior,and *** entities are constructed from the information derived from the trajectory *** behaviors are defined by rules following behavioral logic under anxiety psychology,which is caused by the limited range of *** events are triggered based on rules from *** the help of this framework,a multi-objective optimization model is developed to obtain the optimal substitution scale of GTs in the case study area of Zhengzhou ***,the approach could provide a practical tool to address this challenge,which could support further studies of the effect of ETs on urban taxis.

关键词： Electric Taxi(ET) substitution scale discrete-event simulation decision support multi-objective optimization

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

Machine Allocation in Semiconductor Wafer Fabrication Systems:A simulation-Based Approach

引用

Journal of Systems Science and Systems Engineering 2023年第3期32卷 372-390页

作者： Yanfeng Wu Sihua Chen School of Finance Jjiangxi University of Finance and EconomicsNanchang 330013China School of Information Management Jiangxi University of Finance and EconomicsNanchang 330032China

The problem of maximizing the throughput of Semiconductor Wafer Fabrication Systems is *** model the fabrication systems as a Stochastic Timed Automata and design a discrete-event simulation *** simulation scheme is explicit,fast and achieves high fidelity which captures the feature of reentrant process flow and is flexible to accommodate diversified wafer lot scheduling policies.A series of Marginal Machine Allocation Algorithms are proposed to sequentially allocate *** experiments suggest the designed methods are efficient to find good allocation solutions.

关键词： Semiconductor wafer fabrication system machine allocation discrete-event simulation marginal machine allocation

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

DYNAMIC RESOURCE ALLOCATION FOR EFFICIENT PATIENT SCHEDULING： A DATA-DRIVEN APPROACH

引用

Journal of Systems Science and Systems Engineering 2017年第4期26卷 448-462页

作者： Monique Bakker Kwok-Leung Tsui Department of Systems Engineering and Engineering Management City University of Hong Kong China

Efficient staff rostering and patient scheduling to meet outpatient demand is a very complex and dynamic task. Due to fluctuations in demand and specialist availability, specialist allocation must be very flexible and non-myopic. Medical specialists are typically restricted in sub-specialization, serve several patient groups and are the key resource in a chain of patient visits to the clinic and operating room （OR）. To overcome a myopic view of once-off appointment scheduling, we address the patient flow through a chain of patient appointments when allocating key resources to different patient groups. We present a new, data-driven algorithmic approach to automatic allocation of specialists to roster activities and patient groups. By their very nature, simplified mathematical models cannot capture the complexity that is characteristic to the system being modeled. In our approach, the allocation of specialists to their day-to-day activities is flexible and responsive to past and present key resource availability, as well as to past resource allocation. Variability in roster activities is actively minimized, in order to enhance the supply chain flow. With discrete-event simulation of the application case using empirical data, we illustrate how our approach improves patient Service Level （SL, percentage of patients served on-time） as well as Wait Time （days）, without change in resource capacity.

关键词： Patient scheduling dynamic rostering patient care path discrete-event simulation

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

P-Tree Structures and event Horizon： Efficient event-Set Implementations

引用

Journal of Computer Science & Technology 2006年第1期21卷 19-26页

作者： Katerina Asdre Stavros D. Nikolopoulos Department of Computer Science University of Ioannina GR-45110 Ioannina Greece

This paper describes efficient data structures, namely the Indexed P-tree, Block P-tree, and Indexed-Block P-tree （or/P-tree, BP-tree, and IBP-tree, respectively, for short）, for maintaining future events in a general purpose discrete event simulation system, and studies the performance of their event set algorithms under the event horizon principle. For comparison reasons, some well-known event set algorithms have been selected and studied, that is, the Dynamic-heap and the P-tree algorithms. To gain insight into the performance of the proposed event set algorithms and allow comparisons with the other selected algorithms, they are tested under a wide variety of conditions in an experimental way. The time needed for the execution of the Hold operation is taken as the measure for estimating the average time complexity of the algorithms. The experimental results show that the BP-tree algorithm and the IBP-tree algorithm behave very well with the event set of all the sizes and their performance is almost independent of the stochastic distributions.

关键词： discrete-event simulation event set algorithms hold model event horizon data structures heap P-tree P-tree structures

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

simulation to Predict the Impact of Public Transport Changes on Air Pollutants Emissions

Simulation to Predict the Impact of Public Transport Changes...

引用

作者： Juan D.ARISTIZABAL Daniela AZUMENDI Juan F.FRANCO Ivan MURA Universidad de los Andes Duke Kunshan University

Predicting the effects of the introduction of alternative transportation means on air quality is an important task for urban mobility *** study proposes a methodology that uses simulation to estimate the impact of changes in public transport on the traffic emissions of *** using mobility planning information simulation models can be built,which can provide estimation of the dynamics of traffic over ***,coupling simulated traffic with emission factors of vehicles,an emission model can be used to estimate the total amount of PM2.5 *** this approach,the effect of changes in the public transportation system can be assessed with respect to PM2.5 *** the paper,we explore a case study in the city of Bogotá,Colombia,when a bus rapid transport system is to be added alongside a major city avenue.

关键词： Air quality discrete-event simulation Transportation networks Urban mobility planning

来源： cnki会议评论

在线全文

cnki会议

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

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

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：