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1

Kabzeva, Aneta, Joachim Götze, and Paul Müller. "Model-Based Relationship Management for Service Networks." International Journal of Systems and Service-Oriented Engineering 5, no. 4 (2015): 104–32. http://dx.doi.org/10.4018/ijssoe.2015100105.

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With the broad adoption of service-orientation for the realization of business applications and their provisioning and usage over cloud infrastructures, the topology of the resulting service networks is becoming extremely complex. Due to the composition of services for value-added business capabilities and the reusability of a service in multiple compositions, the execution of one service often depends on other services and changes in its provisioning can affect the health of large parts of the service network. The lack of insight on the relationships between the network components makes the management of the service network's health hard and error prone tasks. This article introduces a service network modeling approach for capturing the topology of a service network at design time. The approach considers the complete modeling process from representation, through collection, to analysis of the relationship information. The major contributions are a generic and adaptable modeling structure, a classification of service network entities and relationships, and a modular management framework automating the modeling process.
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SERA, TAKAFUMI, and AKIRA TAKURA. "TASK GENERATION FOR DISTRIBUTED FUNCTIONAL MODEL." International Journal on Artificial Intelligence Tools 05, no. 03 (1996): 277–90. http://dx.doi.org/10.1142/s0218213096000183.

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A new method is proposed to automatically generate the network control specifications necessary for executing services in a network from communications service specifications by using a knowledge of virtual resource that expresses logical functions in a network. Because these communication service specifications are described by observable terminal behaviors, the communication service specifications can be described without detailed knowledge of the network. The conventional stepwise description for network control specifications is manually performed for each network architecture. Then an expert, who has thorough knowledge of networks, must make a detailed design to comply with the requests of network architecture. Then an expert, who has thorough knowledge of internal networks, must make a detailed design to comply with the requests of network architecture. An expert can define in advance the relationship between a service state and a virtual resource and the relationship between a state transition of a virtual resource and task components and can store this knowledge in a database. Communications service specifications can be described without detailed knowledge of the network, and the network control specifications of the network can be derived from the communication service specifications.
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Meng, Qiang, Shuaian Wang, and Zhiyuan Liu. "Network Design for Shipping Service of Large-Scale Intermodal Liners." Transportation Research Record: Journal of the Transportation Research Board 2269, no. 1 (2012): 42–50. http://dx.doi.org/10.3141/2269-05.

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A model was developed for network design of a shipping service for large-scale intermodal liners that captured essential practical issues, including consistency with current services, slot purchasing, inland and maritime transportation, multiple-type containers, and origin-to-destination transit time. The model used a liner shipping hub-and-spoke network to facilitate laden container routing from one port to another. Laden container routing in the inland transportation network was combined with the maritime network by defining a set of candidate export and import ports. Empty container flow is described on the basis of path flow and leg flow in the inland and maritime networks, respectively. The problem of network design for shipping service of an intermodal liner was formulated as a mixed-integer linear programming model. The proposed model was used to design the shipping services for a global liner shipping company.
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Tseng, Chia-Wei, Yu-Kai Huang, Fan-Hsun Tseng, Yao-Tsung Yang, Chien-Chang Liu, and Li-Der Chou. "Micro Operator Design Pattern in 5G SDN/NFV Network." Wireless Communications and Mobile Computing 2018 (July 10, 2018): 1–14. http://dx.doi.org/10.1155/2018/3471610.

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The trend of 5G mobile networks is increasing with the number of users and the transmission rate. Many operators are turning to small cell and indoor coverage of telecom network service. With the emerging Software Defined Networking and Network Function Virtualization technologies, Internet Service Provider is able to deploy their networks more flexibly and dynamically. In addition to the change of the wireless mobile network deployment model, it also drives the development trend of the Micro Operator (μO). Telecom operators can provide regional network services through public buildings, shopping malls, or industrial sites. In addition, localized network services are provided and bandwidth consumption is reduced. The distributed architecture ofμO tackles computing requirements for applications, data, and services from cloud data center to edge network devices or to the micro data center ofμO. The service model ofμO is capable of reducing network latency in response to the low-latency applications for future 5G edge computing environment. This paper addresses the design pattern of 5G micro operator and proposes a Decision Tree Based Flow Redirection (DTBFR) mechanism to redirect the traffic flows to neighbor service nodes. The DTBFR mechanism allows differentμOs to share network resources and speed up the development of edge computing in the future.
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Ndlovu, Lungisani, Okuthe P. Kogeda, and Manoj Lall. "Enhanced Service Discovery Model for Wireless Mesh Networks." Journal of Advanced Computational Intelligence and Intelligent Informatics 22, no. 1 (2018): 44–53. http://dx.doi.org/10.20965/jaciii.2018.p0044.

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Wireless mesh networks (WMNs) are the only cost-effective networks that support seamless connectivity, wide area network (WAN) coverage, and mobility features. However, the rapid increase in the number of users on these networks has brought an upsurge in competition for available resources and services. Consequently, factors such as link congestion, data collisions, link interferences, etc. are likely to occur during service discovery on these networks. This further degrades their quality of service (QoS). Therefore, the quick and timely discovery of these services becomes an essential parameter in optimizing the performance of service discovery on WMNs. In this paper, we present the design and implementation of an enhanced service discovery model that solves the performance bottleneck incurred by service discovery on WMNs. The proposed model integrates the particle swarm optimization (PSO) and ant colony optimization (ACO) algorithms to improve QoS. We use the PSO algorithm to assign different priorities to services on the network. On the other hand, we use the ACO algorithm to effectively establish the most cost-effective path whenever each transmitter has to be searched to identify whether it possesses the requested service(s). Furthermore, we design and implement the link congestion reduction (LCR) algorithm to define the number of service receivers to be granted access to services simultaneously. We simulate, test, and evaluate the proposed model in Network Simulator 2 (NS2), against ant colony-based multi constraints, QoS-aware service selection (QSS), and FLEXIble Mesh Service Discovery (FLEXI-MSD) models. The results show an average service discovery throughput of 80%, service availability of 96%, service discovery delay of 1.8 s, and success probability of service selection of 89%.
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Wei, Jun Ling. "SN Network Service Model Based on Web Resources." Applied Mechanics and Materials 543-547 (March 2014): 3226–29. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.3226.

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Based on design thinking of web services network resources, this paper treated the organization and management of web resources as the purpose and built the mathematical model and algorithm of web network resources service. It designed the spiritual home network ideological and political education network system according to model and algorithm. Spiritual home network system achieved three functions. In order to improve the efficiency of network services, this paper matched the service of spiritual home and finally got a simple web service interface. Finally, the paper compared the service system in this paper with the general service system. The service system designed in this paper can search the service needed in a shorter time. Its accuracy is higher than general service system.
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Li, Qing Song, Li Zhi Qin, Wei Yang, and Yong Hui Wang. "Design of Service Network of Huachuan Denso Co." Applied Mechanics and Materials 101-102 (September 2011): 352–55. http://dx.doi.org/10.4028/www.scientific.net/amm.101-102.352.

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Location decision of Service Networks is important for an enterprise to dominate market and to improve service level. Characteristics and the decentralized control strategies of service network were discussed for the enterprise of Denso class. A 0-1 mixed integer programming model was established for location problem of spare parts centers and solved by ILOG along with sensitivity analysis. Furthermore, a dynamic programming model was established for location problem of sales model shop and calculated by a numerical listing method.
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Xiao, Jie, Yi Xie, Haowei Yu, and Hongying Yan. "An Optimization Method for the Train Service Network Design Problem." Discrete Dynamics in Nature and Society 2020 (January 17, 2020): 1–18. http://dx.doi.org/10.1155/2020/9519267.

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Effective railway freight transportation relies on a well-designed train service network. This paper investigates the train service network design problem at the tactical level for the Chinese railway system. It aims to determine the types of train services to be offered, how many trains of each service are to be dispatched per day (service frequency), and by which train services shipments are to be transported. An integer programming model is proposed to address this problem. The optimization model considers both through train services between nonadjacent yards, and two classes of service between two adjacent yards ( i.e., shuttle train services directly from one yard to its adjacent yard, and local train services that make at least one intermediate stop). The objective of the model is to optimize the transportation of all the shipments with minimal costs. The costs consist of accumulation costs, classification coststrain operation costs, and train travel costs. The NP-hard nature of the problem prevents an exact solution algorithm from finding the optimal solution within a reasonable time, even for small-scale cases. Therefore, an improved genetic algorithm is designed and employed here. To demonstrate the proposed model and the algorithm, a case study on a real-world sub-network in China is carried out. The computational results show that the proposed approach can obtain high-quality solutions with satisfactory speed. Moreover, comparative analysis on a case that assumes all the shuttle train services between any two adjacent yards to be provided without optimization reveals some interesting insights.
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Liu, Siqi, Boliang Lin, Jianping Wu, and Yinan Zhao. "Modeling the Service Network Design Problem in Railway Express Shipment Delivery." Symmetry 10, no. 9 (2018): 391. http://dx.doi.org/10.3390/sym10090391.

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As air pollution becomes increasingly severe, express trains play a more important role in shifting road freight and reducing carbon emissions. Thus, the design of railway express shipment service networks has become a key issue, which needs to be addressed urgently both in theory and practice. The railway express shipment service network design problem (RESSNDP) not only involves the selection of train services and determination of service frequency, but it is also associated with shipment routing, which can be viewed as a service network design problem (SNDP) with railway characteristics. This paper proposes a non-linear integer programming model (INLP) which aims at finding a service network and shipment routing plan with minimum cost while satisfying the transportation time constraints of shipments, carrying capacity constraints of train services, flow conservation constraint and logical constraints among decision variables. In addition, a linearization technique was adopted to transform our model into a linear one to obtain a global optimal solution. To evaluate the effectiveness and efficiency of our approach, a small trial problem was solved by the state-of-the-art mathematical programming solver Gurobi 7.5.2.
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Dutta, Saurab, and Payel Roy. "Cluster Based Architecture and Algorithm to Improve the Design of Social Networks." International Journal of Virtual Communities and Social Networking 9, no. 3 (2017): 29–43. http://dx.doi.org/10.4018/ijvcsn.2017070103.

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In a social network people are connected by relationships, business purpose or transaction activity. The increasing demand of social network analysis and how to improve the architecture is of utmost importance for the organizations who are regularly trying to improve the service through social network analysis. Social network analysis views social relationship in terms of network theory. Social networks connect people at very low cost and this network acts as a customer relationship management tool for increasing sales of organization in terms of goods and services. Different models are proposed and utilized in different platforms. In this model, the authors have proposed a cluster-based structure to improve performance of social networks.
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Konstantinidou, Maria A., Konstantinos L. Kepaptsoglou, and Antony Stathopoulos. "A Multi-objective Network Design Model for Post-disaster Transportation Network Management." PROMET - Traffic&Transportation 31, no. 1 (2019): 11–23. http://dx.doi.org/10.7307/ptt.v31i1.2743.

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Despite their inherent vulnerability to structural and functional degradation, transportation networks play a vital role in the aftermath of disasters by ensuring physical access to the affected communities and providing services according to the generated needs. In this setting of operational conditions and service needs which deviate from normal, a restructuring of network functions is deemed to be beneficial for overall network serviceability. In such context, this paper explores the planning of post-disaster operations on a network following a hazardous event on one of the network’s nodes. Lane reversal, demand regulation and path activation are applied to provide an optimally reconfigured network with reallocated demand, so that the network performance is maximized. The problem is formulated as a bi-level optimization model; the upper level determines the optimal network management strategy implementation scheme while the lower level assigns traffic on the network. Three performance indices are used for that purpose: the total network travel time (TNTT), the total network flow (TNF) and the special origin-destination pair (OD pair) accessibility. A genetic algorithm coupled with a traffic assignment process is used as a solution methodology. Application of the model on a real urban network proves the computational efficiency of the algorithm; the model systematically produces robust results of enhanced network performance, indicating its value as an operation planning tool.
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Wang, Jiao, Jay Weitzen, Oguz Bayat, Volkan Sevindik, and Mingzhe Li. "Performance Model for Video Service in 5G Networks." Future Internet 12, no. 6 (2020): 99. http://dx.doi.org/10.3390/fi12060099.

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Network slicing allows operators to sell customized slices to various tenants at different prices. To provide better-performing and cost-efficient services, network slicing is looking to intelligent resource management approaches to be aligned to users’ activities per slice. In this article, we propose a radio access network (RAN) slicing design methodology for quality of service (QoS) provisioning, for differentiated services in a 5G network. A performance model is constructed for each service using machine learning (ML)-based approaches, optimized using interference coordination approaches, and used to facilitate service level agreement (SLA) mapping to the radio resource. The optimal bandwidth allocation is dynamically adjusted based on instantaneous network load conditions. We investigate the application of machine learning in solving the radio resource slicing problem and demonstrate the advantage of machine learning through extensive simulations. A case study is presented to demonstrate the effectiveness of the proposed radio resource slicing approach.
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13

Ng, ManWo, and Hong K. Lo. "Robust models for transportation service network design." Transportation Research Part B: Methodological 94 (December 2016): 378–86. http://dx.doi.org/10.1016/j.trb.2016.10.001.

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14

Gan, Mi, Xinyuan Li, Fadong Zhang, and Zhenggang He. "Regional Logistics Network Design in Mitigating Truck Flow-Caused Congestion Problems." Journal of Advanced Transportation 2020 (April 29, 2020): 1–12. http://dx.doi.org/10.1155/2020/5197025.

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Truck flow plays a vital role in urban traffic congestion and has a significant influence on cities. In this study, we develop a novel model for solving regional logistics network (RLN) design problems considering the traffic status of the background transportation network. The models determine not only the facility location, initial distribution planning, roadway construction, and expansion decisions but also offer an optimal solution to the logistics network service level and truck-type selections. We first analyze the relationship between the urban transportation network and the RLN design problem using real truck data and traffic flow status in a typical city. Then, we develop the uncover degree function (UDF), which reflects the service degree of the RLN and formulates based on an impedance function. Subsequently, the integrated logistics network design models are proposed. We model the RLN design problem as a minimal cost problem and design double-layer Lagrangian relaxation heuristics algorithms to solve the model problems. Through experiments with data from the six-node problem and Sioux-Falls network, the effectiveness of the models and algorithms is verified. This study contributes to the planning of regional logistics networks while mitigating traffic congestion caused by truck flow.
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Jiang, Yuan, Baofeng Sun, Gendao Li, Zhibin Lin, Changxu Zheng, and Xiuxiu Shen. "Highway Passenger Transport Based Express Parcel Service Network Design: Model and Algorithm." Journal of Advanced Transportation 2017 (2017): 1–17. http://dx.doi.org/10.1155/2017/1712325.

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Highway passenger transport based express parcel service (HPTB-EPS) is an emerging business that uses unutilised room of coach trunk to ship parcels between major cities. While it is reaping more and more express market, the managers are facing difficult decisions to design the service network. This paper investigates the HPTB-EPS network design problem and analyses the time-space characteristics of such network. A mixed-integer programming model is formulated integrating the service decision, frequency, and network flow distribution. To solve the model, a decomposition-based heuristic algorithm is designed by decomposing the problem as three steps: construction of service network, service path selection, and distribution of network flow. Numerical experiment using real data from our partner company demonstrates the effectiveness of our model and algorithm. We found that our solution could reduce the total cost by up to 16.3% compared to the carrier’s solution. The sensitivity analysis demonstrates the robustness and flexibility of the solutions of the model.
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Eun, Jong Boo, Gyou Tae Park, Gwang Hoon Ahn, and Hie Sik Kim. "The Optical Network Design Using Availability Models to Accept Additional Nodes." Advanced Engineering Forum 2-3 (December 2011): 553–58. http://dx.doi.org/10.4028/www.scientific.net/aef.2-3.553.

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It is so obvious that we have to consider factors of costs, the QoS (Quality of Service), and performance analysis for the design of an optical network. The models of Traffic and availability are significant factors for achieving the performance analysis from the initial step to deploying network. But current traffic models are solely used by a single segment. Whole networks are extended from a sing traffic model. On the other hand an availability model is just used to find the rate of hardware failures. In this paper, we implemented an availability model with regional conformance by inversely analyzing the definition of availability. Also, we computed the number of nodes and links to configure the logical topology of optical networks by using our designed availability. Furthermore, we proposed a method to design an optical network by using our novel availability model.
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Zhou, Li. "Cloud Computing Research Vehicle Traffic Information Service System Based on Network." Applied Mechanics and Materials 727-728 (January 2015): 944–47. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.944.

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In vehicle network under the cloud computing environment model of traffic information service system construction as the goal, the use of cloud computing technology and service oriented software architecture is divided into thought, differentiation and security mechanism from the service account, complete vehicle based on cloud computing network traffic information service system of the letter of the architecture design, function design, software structure design. Based on the geographical space cloud services, cloud services based car networking function, constructing high performance, scalable, supporting differentiated information service system. The research results show that: cloud computing car network traffic information service collaborative system can greatly improve the level of intelligent, personalized information service based on traffic, the user required service supply pertinence increased significantly; system can provide traffic information service more safe and reliable for vehicle network users of the service coordination, which helps to guarantee Intelligent Transportation and efficient operation.
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Sallu, Sulfikar, and Qammaddin Qammaddin. "RANCANGAN PEMBELAJARAN JARINGAN KOMPUTER MODEL DICK DAN CAREY BERBASIS MANAJEMEN LAYANAN INFORMATION TECHNOLOGY INFRASTRUCTURE LIBRARY (ITIL)." Instruksional 2, no. 2 (2021): 1. http://dx.doi.org/10.24853/instruksional.2.2.1-6.

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Computer Network Learning is one of the teaching and learning processes in the compulsory Computer Networking course in a study program in the computer science family. Dick and Carey designs are the general components of a learning material from the procedures that will be used in learning to produce the desired learning outcomes. Furthermore, Information Technology Infrastructure Library (ITIL) is one of the frameworks that is part of Service Management in IT governance to make it easier to evaluate IT services and to find out things that must be developed in that service. The purpose of this study was to produce a design concept in the ITIL-based dick and carey model of computer network learning design. The method used is a literature review that utilizes all available reference sources. The result achieved is the ITIL-based Dick and Carey model computer network course concept which will create a quality computer network learning design.
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Ypsilantis and Zuidwijk. "Collaborative Fleet Deployment and Routing for Sustainable Transport." Sustainability 11, no. 20 (2019): 5666. http://dx.doi.org/10.3390/su11205666.

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Efficient multi-modal transportation in the hinterland of seaport terminals dependson consolidation of container volumes in support of frequent services of high capacity means oftransport, such that sustainable multi-modal transport can compete with uni-modal road transportin cost and time. The tactical design of barge scheduled transport services involves fleet selectionand routing through the inland waterway network. The resulting network service design shouldmeet expected demand and service time requirements set by the shippers. We develop a tightMILP formulation for the Fleet Size and Mix Vehicle Routing (FSMVRP) especially adapted for thePort-Hinterland multi-modal barge network design. Also, an analytical model is developed to helpunderstand important design trade-offs made. We consider the case of horizontal cooperation of dryport container terminals that share capacity. Our results show that in case of cooperation, both costsavings and service levels are improved, and allow for sustainable multi-modal transport to becompetitive with uni-modal truck transport.
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Pinto, Roberto, Michela Zambetti, Alexandra Lagorio, and Fabiana Pirola. "A network design model for a meal delivery service using drones." International Journal of Logistics Research and Applications 23, no. 4 (2019): 354–74. http://dx.doi.org/10.1080/13675567.2019.1696290.

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Inghels, Dirk, Wout Dullaert, and Daniele Vigo. "A service network design model for multimodal municipal solid waste transport." European Journal of Operational Research 254, no. 1 (2016): 68–79. http://dx.doi.org/10.1016/j.ejor.2016.03.036.

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Plum, Christian E. M., David Pisinger, and Mikkel M. Sigurd. "A service flow model for the liner shipping network design problem." European Journal of Operational Research 235, no. 2 (2014): 378–86. http://dx.doi.org/10.1016/j.ejor.2013.10.057.

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Ping, Deng Li, Guo Bing, and Zheng Wen. "Web Service Clustering Approach Based on Network and Fused Document-Based and Tag-Based Topics Similarity." International Journal of Web Services Research 18, no. 3 (2021): 63–81. http://dx.doi.org/10.4018/ijwsr.2021070104.

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To produce a web services clustering with values that satisfy many requirements is a challenging focus. In this article, the authors proposed a new approach with two models, which are helpful to the service clustering problem. Firstly, a document-tag LDA model (DTag-LDA) is proposed that considers the tag information of web services, and the tag can describe the effective information of documents accurately. Based on the first model, this article further proposes an efficient document weight and tag weight-LDA model (DTw-LDA), which fused multi-modal data network. To further improve the clustering accuracy, the model constructs the network for describing text and tag respectively and then merges the two networks to generate web service network clustered. In addition, this article also designs experiments to verify that the used auxiliary information can help to extract more accurate semantics by conducting service classification. And the proposed method has obvious advantages in precision, recall, purity, and other performance.
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Urrutia-Valdés, Carlos, Amit Mukhopadhyay, Mohamed El-Sayed, Zulfiquar Sayeed, and Dong Sun. "SIP in 3G wireless networks: Service models, architecture, and network design." Bell Labs Technical Journal 9, no. 3 (2004): 101–26. http://dx.doi.org/10.1002/bltj.20045.

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Wang, Zujian, and Mingyao Qi. "Robust Service Network Design Under Demand Uncertainty." Transportation Science 54, no. 3 (2020): 676–89. http://dx.doi.org/10.1287/trsc.2019.0935.

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Freight forwarding companies commonly encounter difficulties in handling uncertainties, especially demand uncertainty under the circumstances of no sufficient historical data or accurate forecasting approach. A two-stage robust optimization method is proposed for service network design under demand uncertainty. We employ probability-free uncertainty sets to illuminate the potential scenarios and develop a column-and-constraint generation approach as the solution method to solve the introduced robust models exactly. As indicated by the numerical results, the algorithm we proposed herein performs better than the Benders decomposition approach in terms of computing speed and quality of the solution. Comparative results demonstrate the robustness of the proposed models. We also analyze the structural properties of robust solutions, which provide operational flexibility against uncertainty.
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Mühlethaler, Paul, Éric Renault, and Selma Boumerdassi. "Design and Evaluation of Flooding-Based Location Service in Vehicular Ad Hoc Networks." Sensors 20, no. 8 (2020): 2389. http://dx.doi.org/10.3390/s20082389.

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Location-based routing protocols for vehicular ad hoc networks (VANETs) use location information to determine routing decisions. This information is provided by a location service that is queried by nodes in order to properly forward packets to communication partners. This paper presents the semiflooding location service, a proactive flooding-based location service that drastically reduces the number of update packets sent over the network compared to traditional flooding-based location services. This goal is achieved by each node partially forwarding location information. We present both deterministic and probabilistic approaches for this algorithm, which remains very simple. A mathematical model is proposed to show the effectiveness of this solution. The cases of homogeneous 1D, 2D, and 3D networks were studied for both deterministic and probabilistic forwarding decisions. We compare our algorithm with simple flooding and with the multipoint-relay (MPR) flooding of the optimized-link-state-routing (OLSR) protocol, and we show that our algorithm, despite being very simple, has excellent scalability properties. The mean number of generated messages ranges with the mean number of the neighbors of one random network node.
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LIUM, ARNT-GUNNAR, TEODOR GABRIEL CRAINIC, and STEIN W. WALLACE. "CORRELATIONS IN STOCHASTIC PROGRAMMING: A CASE FROM STOCHASTIC SERVICE NETWORK DESIGN." Asia-Pacific Journal of Operational Research 24, no. 02 (2007): 161–79. http://dx.doi.org/10.1142/s0217595907001206.

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Deterministic models, even if used repeatedly, will not capture the essence of planning in an uncertain world. Flexibility and robustness can only be properly valued in models that use stochastics explicitly, such as stochastic optimization models. However, it may also be very important to capture how the random phenomena are related to one another. In this article we show how the solution to a stochastic service network design model depends heavily on the correlation structure among the random demands. The major goal of this paper is to discuss why this happens, and to provide insights into the effects of correlations on solution structures. We illustrate by an example.
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Qi, Ning, Bin Qiang Wang, and Bao Jin Wang. "Balanced Link Mapping in Multicast Service Overlay Networks Design." Advanced Materials Research 267 (June 2011): 7–12. http://dx.doi.org/10.4028/www.scientific.net/amr.267.7.

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In order to address some deployment problems of IP multicast, the notion of Multicast Service Overlay Network (MSON) is proposed. How to construct MSON satisfying user’s demand efficiently under the situation of limited resources is a hot issue. In this paper we analyze a mathematics model of MSON construction. Under the objective of finding a virtual topology on top of physical network fulfilling all restrictions, and minimizing the cost of construction while keeping residual physical network the most balanced, an Integer Linear Programming model of the construction problem is depicted. In order to solve the problem efficiently, we propose a heuristics algorithm named BLMH. The efficiency of BLMH is evaluated by emulation experiment according to congestion link number under several scenarios.
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Zhao, Y. Z., J. M. Zhou, and Q. R. Xing. "A continuous hub location model with service constraints for shipping network design." Journal of Interdisciplinary Mathematics 19, no. 4 (2016): 681–95. http://dx.doi.org/10.1080/09720502.2016.1179488.

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Laaziz, El Hassan, and Najiba Sbihi. "A service network design model for an intermodal rail-road freight forwarder." International Journal of Logistics Systems and Management 32, no. 3/4 (2019): 465. http://dx.doi.org/10.1504/ijlsm.2019.098328.

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Laaziz, El Hassan, and Najiba Sbihi. "A service network design model for an intermodal rail-road freight forwarder." International Journal of Logistics Systems and Management 32, no. 3/4 (2019): 465. http://dx.doi.org/10.1504/ijlsm.2019.10019770.

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Zhang, M., M. Janic, and L. A. Tavasszy. "A freight transport optimization model for integrated network, service, and policy design." Transportation Research Part E: Logistics and Transportation Review 77 (May 2015): 61–76. http://dx.doi.org/10.1016/j.tre.2015.02.013.

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Ahn, Byung-Ik, and Young-Do Joo. "Design of Location Based Social Network Service Model Centering around Smart Phone." Journal of the Korea Industrial Information Systems Research 16, no. 5 (2011): 55–62. http://dx.doi.org/10.9723/jksiis.2011.16.5.055.

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Sharma, Sujeet Kumar, Srikrishna Madhumohan Govindaluri, and Said Gattoufi. "Understanding and predicting the quality determinants of e-government services." Journal of Modelling in Management 10, no. 3 (2015): 325–40. http://dx.doi.org/10.1108/jm2-12-2013-0069.

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Purpose – The purpose of this paper is to investigate the quality determinants influencing the adoption of e-government services in Oman and compare the performance of multiple regression and neural network models in identifying the significant factors influencing adoption in Oman. Design/methodology/approach – Primary data concerning service quality determinants and demographic variables were collected using a structured questionnaire survey. The variables selected in the design of the questionnaire were based on an extensive literature review. Factor analysis, multiple linear regression and neural network models were employed to analyze data. Findings – The study found that quality determinants: responsiveness, security, efficiency and reliability are statistically significant predictors of adoption. The neural network model performed better than the regression model in the prediction of e-government services’ adoption and was able to characterize the non-linear relationship of the aforementioned predictors with the adoption of e-government services. Further, the neural network model was able to identify demographic variables as significant predictors. Practical implications – This study highlights the importance of service quality in the adoption of e-government services and suggests that an enhanced focus and investment on improving quality of the design and delivery of e-government services can have a positive impact on the usage of the services, thereby enabling the Oman Government in achieving the governance objectives for which these technologies were employed. Originality/value – Studies in the area of e-government typically focus either on technology adoption problems or service quality problems. The role of service quality in adoption is rarely addressed. The research presented in this paper is of great value to the institutions that are involved in the development of technology-based e-government services in Oman.
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Beshley, Mykola, Natalia Kryvinska, Halyna Beshley, Oleg Yaremko, and Julia Pyrih. "Virtual Router Design and Modeling for Future Networks with QoS Guarantees." Electronics 10, no. 10 (2021): 1139. http://dx.doi.org/10.3390/electronics10101139.

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A virtual router model with a static and dynamic resource reconfiguration for future internet networking was developed. This technique allows us to create efficient virtual devices with optimal parameters (queue length, queue overflow management discipline, number of serving devices, mode of serving devices) to ensure the required level of quality of service (QoS). An analytical model of a network device with virtual routers is proposed. By means of the mentioned mathematical representation, it is possible to determine the main parameters of the virtual queue system, which are based on the first in, first out (FIFO) algorithm, in order to analyze the efficiency of network resources utilization, as well as to determine the parameters of QoS flows, for a given intensity of packets arrival at the input interface of the network element. In order to research the guaranteed level of QoS in future telecommunications networks, a simulation model of a packet router with resource virtualization was developed. This model will allow designers to choose the optimal parameters of network equipment for the organization of virtual routers, which, in contrast to the existing principle of service, will provide the necessary quality of service provision to end users in the future network. It is shown that the use of standard static network device virtualization technology is not able to fully provide a guaranteed level of QoS to all present flows in the network by the criterion of minimum delay. An approach for dynamic reconfiguration of network device resources for virtual routers has been proposed, which allows more flexible resource management at certain points in time depending on the input load. Based on the results of the study, it is shown that the dynamic virtualization of the network device provides a guaranteed level of QoS for all transmitted flows. Thus, the obtained results confirm the feasibility of using dynamic reconfiguration of network device resources to improve the quality of service for end users.
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Duerinckx, Andre J., John J. Kenagy, and Edward G. Grant. "Planning and cost analysis of digital radiography services for a network of hospitals the Veterans Integrated Service Network." Journal of Telemedicine and Telecare 4, no. 3 (1998): 172–78. http://dx.doi.org/10.1258/1357633981932163.

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This study analysed the design and cost of a picture archiving and communications system PACS , computerized radiography CR and a wide-area network for teleradiology. The Desert Pacific Healthcare Network comprises 10 facilities, including four tertiary medical centres and one small hospital. Data were collected on radiologists' workloads, and patient and image flow within and between these medical centres. These were used to estimate the size and cash flows associated with a system-wide implementation of PACS, CR and teleradiology services. A cost analysis model was used to estimate the potential cost savings in a filmless radiology environment. ATM technology was selected as the communications medium between the medical centres. A strategic plan and business plan were successfully developed. The cost model predicted the cost-effectiveness of the proposed PACS CR configuration within four to six years, if the base costs were kept low. The experience gained in design and cost analysis of a PACS teleradiology network will serve as a model for similar projects.
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Qian, Fubin, and Yue Xu. "A Simulation Model for LTL Trucking Network." International Journal of Information Systems and Supply Chain Management 5, no. 3 (2012): 78–87. http://dx.doi.org/10.4018/jisscm.2012070105.

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Service network design (SND) is a part of tactical planning activities of transportation companies. Less-than-truckload (LTL) trucking industry has been steadily expanding the market share in the past decades, due to its operational flexibility and high efficiency. In order to provide flexible and robust service schedule for LTL carriers, stochasticity is explicitly taken into account when formulating the SND problem. Service schedules derived from the stochastic model show structural difference with its deterministic counterparts. This research project develops a simulation model of an LTL network, in order to evaluate the system performance of LTL network with the stochastic schedule. A set of experiments shows that the stochastic solution performs very well when it is confronted with random customer demands. Furthermore, the stochastic schedule is much better than the deterministic one in terms of the proportion of undelivered commodities.
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38

van Nes, Rob. "Multiuser-Class Urban Transit Network Design." Transportation Research Record: Journal of the Transportation Research Board 1835, no. 1 (2003): 25–33. http://dx.doi.org/10.3141/1835-04.

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In transit network design it is common to use characteristics of the average traveler to describe travel behavior, while in reality different traveler groups can be distinguished that react differently with respect to transport service quality. A study is conducted of the possible consequences of basing the design of urban transit networks on the preferences of specific traveler groups. To that end, an analytical network optimization model is developed that considers a mix of different traveler groups simultaneously. Results from the analyses show that focusing on specific traveler groups leads to clearly different network design characteristics. However, the optimal network design developed for the average traveler proved to be the best network for all traveler groups. Furthermore, it was found that focusing on traveler groups having good transport alternatives led to very low values of consumer surplus and social welfare. Optimizing transit networks while considering different traveler groups simultaneously results in networks that are similar to those using the traditional single-user-class approach based on the average traveler. Differences in preferences for traveler groups are balanced by the size of the resulting transit patronage. Apparently, a more realistic description of the demand side is not essential for urban transit network design.
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39

Carroll, Noel. "So that’s what the impact of IT innovation looks like? Examining the socio-technical dynamics of public service innovation." Journal of Enterprise Information Management 29, no. 5 (2016): 677–705. http://dx.doi.org/10.1108/jeim-07-2014-0072.

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Purpose Services comprise of socio-technical (human and technological) factors which exchange various resources and competencies. Service networks are used to transfer resources and competencies, yet they remain an underexplored and “invisible” infrastructure. Considering the growth in technological investment in recent years, this research sets out to model the impact of IT-enabled innovation on a service network. In response to the growing importance placed on understanding these complexities, the field of “service science” has emerged to guide the effective design, implementation, and management of service systems. The purpose of this paper is to investigate the impact of introducing an IT-enabled innovation in a public service network. Design/methodology/approach This is achieved through a case study of an Exam Administration Service Department (EASD) where an electronic grading system was introduced to improve the EASD grading process. Data are analysed using both actor-network theory (ANT) as a theoretical lens and social network analysis (SNA) for empirical purposes to visualise the impact of IT-enabled innovation on a service environment. Findings The research described in this paper makes a useful contribution to the service science and IT innovation community both in terms of its topic (public service networks) and in terms of its theoretical framework and application methods (ANT and SNA). Originality/value This paper demonstrates how we can investigate the impact of IT-enabled innovation within a service network. Most notably, the application of SNA enables us to visualise the impact of technology and gain insights on the socio-technical dynamics associated with introducing service innovations.
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Groven, Fabian, Gaby Odekerken-Schröder, Sandra Zwakhalen, and Jan Hamers. "Network well-being from a balanced centricity perspective." Journal of Services Marketing 35, no. 9 (2021): 1–14. http://dx.doi.org/10.1108/jsm-11-2020-0466.

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Purpose This paper aims to explore how tensions and alignments between different actors’ needs in a transformative services network affect balanced centricity, which is an indicator of well-being. Balanced centricity describes a situation in which all network actors’ interests and needs are fulfilled simultaneously. In such cases, all actors are better off, which increases both individual actors’ and overall actor-network well-being. Design/methodology/approach The empirical study takes place in nursing homes in which in-bed baths represent co-created service encounters that affect the well-being of focal actors (i.e. patients), frontline service employees (i.e. nurses) and transformative service mediators (i.e. family members), who have potentially competing needs. Using a qualitative, phenomenological approach, the study inductively explores and deductively categorizes actors’ personal experiences to gain deep, holistic insights into the service network and its complex web of actor interdependencies. Findings The resulting conceptual model of balanced centricity identifies actors’ lower-order needs as different manifestations of the psychological needs for autonomy, competence and relatedness. If actors’ needs are aligned, their psychological needs can be satisfied, which facilitates balanced centricity. If actors exhibit competing needs though, balanced centricity is impeded. Practical implications This study establishes actors’ psychological needs as the origin of tensions/alignments in multi-actor networks that impede/contribute to balanced centricity. Transformative service providers should try to address all actors’ psychological needs when co-creating services to achieve network well-being. Originality/value This study adopts a novel, multi-actor perspective and thereby presents a conceptual model that contributes to the understanding of balanced centricity. Future research could test this model in other transformative service settings.
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Gładysz, Jakub, and Krzysztof Walkowiak. "Tabu Search Algorithm for Survivable Network Design Problem with Simultaneous Unicast and Anycast Flows." International Journal of Electronics and Telecommunications 56, no. 1 (2010): 41–48. http://dx.doi.org/10.2478/v10177-010-0005-4.

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Tabu Search Algorithm for Survivable Network Design Problem with Simultaneous Unicast and Anycast FlowsIn this work we focus on the problem of survivable network design for simultaneous unicast and anycast flows. This problem follows from the growing popularity of network services applying the anycast paradigm. The anycasting is defined as one-to-one-of-many transmission and is applied in Domain Name Service (DNS), peer-to-peer (P2P) systems, Content Delivery Networks (CDN). In this work we formulate two models that enables joint optimization of network capacity, working and backup connections for both unicast and anycast flows. The goal is to minimize the network cost required to protect the network against failures using the single backup path approach. In the first model we consider modular link cost, in the second we are given a set of link proposal and we must select only one of them. Because these problems are NP-hard, therefore optimal solutions of branch-and-bounds or branch-and-cut methods can be generated for relatively small networks. Consequently, we propose a new heuristic algorithm based on Tabu Search method. We present results showing the effectiveness the proposed heuristic compared against optimal results. Moreover, we report results showing that the use of anycast paradigm can reduce the network cost.
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Leu, Jenq-Shiou, Wei-Hsiang Lin, Wen-Bin Hsieh, and Chien-Chih Lo. "Design and Implementation of a VoIP Broadcasting Service over Embedded Systems in a Heterogeneous Network Environment." Scientific World Journal 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/917060.

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As the digitization is integrated into daily life, media including video and audio are heavily transferred over the Internet nowadays. Voice-over-Internet Protocol (VoIP), the most popular and mature technology, becomes the focus attracting many researches and investments. However, most of the existing studies focused on a one-to-one communication model in a homogeneous network, instead of one-to-many broadcasting model among diverse embedded devices in a heterogeneous network. In this paper, we present the implementation of a VoIP broadcasting service on the open source—Linphone—in a heterogeneous network environment, including WiFi, 3G, and LAN networks. The proposed system featuring VoIP broadcasting over heterogeneous networks can be integrated with heterogeneous agile devices, such as embedded devices or mobile phones. VoIP broadcasting over heterogeneous networks can be integrated into modern smartphones or other embedded devices; thus when users run in a traditional AM/FM signal unreachable area, they still can receive the broadcast voice through the IP network. Also, comprehensive evaluations are conducted to verify the effectiveness of the proposed implementation.
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43

Siderska, Julia, and Khambi Mubarok. "Cloud Manufacturing Platform and Architecture Design." Multidisciplinary Aspects of Production Engineering 1, no. 1 (2018): 673–80. http://dx.doi.org/10.2478/mape-2018-0085.

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Abstract Cloud Manufacturing (CMfg) is an emerging networked manufacturing paradigm and service-oriented manufacturing model, in which distributed manufacturing resources are made available by providers according to consumers’ requirements as on-demand manufacturing services via networks (manufacturing clouds) and cloud manufacturing service platforms. Considering the concept of cloud manufacturing and its operation principle, the paper designs and introduces new proposal of cloud manufacturing service platform architecture, including the following six layers: physical resources layer, soft resources layer, virtual resources layer, services layer, application layer and service-oriented interface layer. After surveying majority of papers introducing architectures of CMfg service platforms, the paper recommends to map both hard as well as soft resources into cloud services from resource layers to virtual resource layer which highlights the core idea of the concept. The paper discusses also the fundamentals of the CMfg paradigm, introduces three groups of actors that participate in a cloud manufacturing system, as well as indicates briefly a typical hierarchy architecture of cloud manufacturing system.
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44

Crainic, Teodor Gabriel, and Antonino Sgalambro. "Service network design models for two-tier city logistics." Optimization Letters 8, no. 4 (2013): 1375–87. http://dx.doi.org/10.1007/s11590-013-0662-1.

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Mark, Shlomo, Shalev Tammy, Guy Shilon, Adi Wolfson, and Dorith Tavor. "Social Network as a Knowledge Service Provider." INTERNATIONAL JOURNAL OF MANAGEMENT & INFORMATION TECHNOLOGY 4, no. 1 (2013): 141–47. http://dx.doi.org/10.24297/ijmit.v4i1.810.

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One of the most important challenges facing humanity today is the design and development of more sustainable processes those that balance the needs of the present generation without compromising the ability of future generations to meet their own needs. The Sustainability as Service Science model (S^3) presents a novel perspective of the relationship between sustainability and services in the framework of service science by defining both sustainable services and sustainability as service and by describing the mutual relationship between sustainability and service. Information-rich, the field of sustainability in many ways suffers from information overload, which can foster uncertainty and confusion during any decision-making process. In this study we present a new social network framework, in which the social network is an 'information to knowledge' service that shares knowledge, in the process evaluating its correspondence to and trustworthiness within the field of sustainability. Guided by the three basic principles of awareness, responsibility, and commitment, the new information to knowledge framework is conceptualized as a platform from which to transform the plethora of information available in the field of sustainability into practical and trusted knowledge.
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46

Bianchini, Devis, Valeria De Antonellis, and Michele Melchiori. "The role of developers’ social relationships in improving service selection." International Journal of Web Information Systems 12, no. 4 (2016): 477–503. http://dx.doi.org/10.1108/ijwis-04-2016-0022.

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Purpose Modern Enterprise Web Application development can exploit third-party software components, both internal and external to the enterprise, that provide access to huge and valuable data sets, tested by millions of users and often available as Web application programming interfaces (APIs). In this context, the developers have to select the right data services and might rely, to this purpose, on advanced techniques, based on functional and non-functional data service descriptive features. This paper focuses on this selection task where data service selection may be difficult because the developer has no control on services, and source reputation could be only partially known. Design/methodology/approach The proposed framework and methodology are apt to provide advanced search and ranking techniques by considering: lightweight data service descriptions, in terms of (semantic) tags and technical aspects; previously developed aggregations of data services, to use in the selection process of a service the past experiences with the services when used in similar applications; social relationships between developers (social network) and their credibility evaluations. This paper also discusses some experimental results regarding the plan to expand other experiments to check how developers feel using the approach. Findings In this paper, a data service selection framework that extends and specializes an existing one for Web APIs selection is presented. The revised multi-layered model for data services is discussed and proper metrics relying on it, meant for supporting the selection of data services in a context of Web application design, are introduced. Model and metrics take into account the network of social relationships between developers, to exploit them for estimating the importance that a developer assigns to other developers’ experience. Originality/value This research, with respect to the state of the art, focuses attention on developers’ social networks in an enterprise context, integrating the developers’ credibility assessment and implementing the social network-based data service selection on top of a rich framework based on a multi-perspective model for data services.
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Fan, Chunmei, Jiansheng Zhu, Haroon Elahi, Lipeng Yang, and Beibei Li. "A Hybridly Optimized LSTM-Based Data Flow Prediction Model for Dependable Online Ticketing." Wireless Communications and Mobile Computing 2021 (June 8, 2021): 1–13. http://dx.doi.org/10.1155/2021/9951607.

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Fifth-generation (5G) communication technologies and artificial intelligence enable the design and deployment of sophisticated solutions for enhanced user experience and superior network-based service delivery. However, the performance of the systems offering 5G-based services depends on various factors. In this paper, we consider the case of the online railway ticketing system in China that serves the needs of hundreds of millions of people daily. This system’s online access rates vary over time, and fluctuations are experienced, affecting its overall dependability and service quality. We use long short-term memory network, particle swarm optimization, and differential evolution to construct DP-LSTM—a hybridly optimized model to predict network flow for dependable and quality-enhanced service delivery. We evaluate the proposed model using real data collected over six months from the “12306 online ticketing” system. We compare the performance of the proposed model with mainstream network traffic prediction models. We use mean absolute percentage error, mean absolute error, and root mean square error for performance evaluation. Experimental results show the superiority of the proposed model.
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Ghosh, Avijit, and C. Samuel Craig. "An Approach to Determining Optimal Locations for New Services." Journal of Marketing Research 23, no. 4 (1986): 354–62. http://dx.doi.org/10.1177/002224378602300405.

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Designing a network of service centers involves a tradeoff between the revenue likely to be generated by providing a high level of service and the cost of operating the service network. The authors develop a procedure for determining the location and design strategies for new services using a modified maximal covering location-allocation model. The network optimization procedure relies on direct assessment of consumer sensitivity to distance and nondistance factors through conjoint analysis and simultaneously determines the network size, location of outlets, price, and operating characteristics.
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Zhao, Yi, Qingwan Xue, Zhichao Cao, and Xi Zhang. "A Two-Stage Chance Constrained Approach with Application to Stochastic Intermodal Service Network Design Problems." Journal of Advanced Transportation 2018 (December 24, 2018): 1–18. http://dx.doi.org/10.1155/2018/6051029.

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Compared with traditional freight transportation, intermodal freight transportation is more competitive which can combine the advantages of different transportation modes. As a consequence, operational research on intermodal freight transportation has received more attention and developed rapidly, but it is still a young research field. In this paper, a stochastic intermodal service network design problem is introduced in a sea-rail transportation system, which considers stochastic travel time, stochastic transfer time, and stochastic container demand. Given candidate train and ship services, we develop a two-stage chance constrained programming model for this problem with the objective of minimising the expected total cost. The first stage allows for the selection of operated services, while the second stage focuses on the determination of intermodal container routes where capacity and on-time delivery chance constraints are presented. A hybrid heuristic algorithm, incorporating sample average approximation and ant colony optimisation, is employed to solve this model. The proposed model is applied to a realistic intermodal sea-rail network, which demonstrates the performance of the model and algorithm as well as the influence of stochasticity on transportation plans. Hence, the proposed methodology can improve effectively the performance of intermodal service network design scheme under stochastic conditions and provide managerial insights for decision-makers.
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Dumez, C., M. Bakhouya, J. Gaber, and M. Wack. "Model-Driven Approaches to Service Composition." International Journal of Adaptive, Resilient and Autonomic Systems 4, no. 4 (2013): 18–35. http://dx.doi.org/10.4018/ijaras.2013100102.

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Companies are now making their know-how and information available over the network using Web services. Business-to-Business collaboration through Web service interaction is now a necessary step to better satisfy user requests. The act of combining Web services to achieve a common goal - also known as Web service composition - is a complex issue that should be addressed. Many programming languages were developed to realize interaction between services, such as XLANG, WSFL, and BPEL. However, these languages are meant for the implementation and execution rather than providing a visual representation of the composition. In the past few years, the research community has been trying to tackle this issue by proposing model-driven approaches with the main objective to reduce development time. Some of these approaches are based on formal methods in order to describe, analyze, verify and validate the composition. In other words, applying these methods in design phase helps designers to show explicitly the behavior of Web services, to reason on the composition behavior and verify its properties. In this paper, the authors survey model-driven approaches for service composition. The focus is on surveying and classifying approaches that follow model-driven engineering principles for creating high-level models rather than programming concepts.
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