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A Cooperative Forwarding Scheme for VANET Routing Protocols 认领 引用
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作者 WU Celimuge JI Yusheng YOSHINAGA Tsutomu 《ZTE Communications》 2016年第3期13-21,共9页
Providing efficient packet delivery in vehicular ad hoc networks （VANETs） is particularly challenging due to the vehicle move- ment and lossy wireless channels. A data packet can be lost at a forwarding node even wh... Providing efficient packet delivery in vehicular ad hoc networks （VANETs） is particularly challenging due to the vehicle move- ment and lossy wireless channels. A data packet can be lost at a forwarding node even when a proper node is selected as the for- warding node. In this paper, we propose a loss-tolerant scheme for unicast routing protocols in VANETs. The proposed scheme employs multiple forwarding nodes to improve the packet reception ratio at the forwarding nodes. The scheme uses network coding to reduce the number of required transmissions, resulting in a significant improvement in end-to-end packet delivery ratio with low message overhead. The effectiveness of the proposed scheme is evaluated by using both theoretical analysis and computer sim- 展开更多
关键词 vehicular ad hoe networks routing protocol network coding cooperative forwarding scheme
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Topology Discovery Sub-Layer for Integrated Terrestrial-Satellite Network Routing Schemes 认领 引用 被引量：9
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作者 Zengyin Yang Hewu Li +1 位作者 Qian Wu Jianping Wu 《China Communications》 SCIE CSCD 2018年第6期42-57,共16页
With the booming development of terrestrial network, scaling terrestrial network over satellite network to build Integrated Terrestrial-Satellite Network(ITSN) and meanwhile to provide the global Internet access, has ... With the booming development of terrestrial network, scaling terrestrial network over satellite network to build Integrated Terrestrial-Satellite Network(ITSN) and meanwhile to provide the global Internet access, has become ever more attractive. Naturally, the widely and successfully used terrestrial routing protocols are the promising protocols to integrate the terrestrial and satellite networks. However, the terrestrial routing protocols, which rely on propagating routing messages to discover New Network Topology(NNT) in the terrestrial network with rare topology changes, will suffer from overly numerous routing messages in satellite network whose topology frequently changes as satellites move. In this paper, a Topology Discovery Sub-layer for ITSN Routing Schemes(TDS-IRS) is firstly proposed to avoid the propagation of numerous routing messages by taking advantage of the movement predictability of satellite and the requirements of routing schemes to discover NNT in advance of topology change. Secondly, a Weighted Perfect Matching based Topology Discovery(WPM-TD) model is designed to conduct the NNT discovery on the ground. Thirdly, this paper builds a testbed with real network devices and meanwhile interconnect that testbed with real Internet, to validate that RS-TDS can discover NNT immediately with the less on-board overhead compared with optimized routing schemes. Finally, different network scenarios are applied to validate the WPM-TD, i.e., the core module of TDS-IRS. Extensive experiments show WPM-TD can work efficiently, avoiding the invalid NNT discovery and decreasing 20% ~ 57% of potential topology changes, which can also improve up to 47% ~ 105% of network throughput. 展开更多
关键词 integrated terrestrial-satellite net-work （itsn） routing scheme topology discovery topology discovery sub-hayer
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A compass time-space model-based virtual IP routing scheme for NTSN satellite constellations 认领 引用 被引量：3
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作者 Yifei JIANG Shufan WU Qiankun MO 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2023年第9期280-288,共9页
Recently,Non-Terrestrial Satellite Networks(NTSTs)have gained more and more attentions due to global coverage,low latency,and high-speed communications.The routing scheme is one of the primary challenges for NTSNs,due... Recently,Non-Terrestrial Satellite Networks(NTSTs)have gained more and more attentions due to global coverage,low latency,and high-speed communications.The routing scheme is one of the primary challenges for NTSNs,due to the mega scale of an NTSN constellation and the dynamic topology feature.To solve many pressing problems,a Compass time-space Model-based Virtual IP(CMVIP)routing scheme is proposed in this paper.In order to compensate for discontinuities in existing topology models,a compass-shaped time-space model is proposed.It can be adapted with Inter-Satellite-Link(ISL)and Ground-Satellite-Link(GSL)transmissions.A distributed algorithm with multiple optimization objectives and multiple constraints is applied for routing path discovery.To more realistically verify the specific scheme,a traffic model that supports two different services is proposed.Access and bearer services are the two main applications of an NTSN.Experimental results demonstrate that the proposed scheme achieves superior Qualityof-Service(QoS)performance.In addition,comparison results demonstrate that the CMVIP routing scheme is superior to the Virtual-Topology-based Shortest Path(VT-SP)routing algorithm. 展开更多
关键词 Quality of service Routing scheme Satellite communication Satellite constellation Satellite network
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HHR:Hierarchical Hybrid Routing Scheme for Information-Centric Network 认领 引用
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作者 DUAN Jie WANG Xiong +1 位作者 WANG Sheng XU Shizhong 《China Communications》 SCIE CSCD 2015年第6期141-153,共13页
Publish/subscribe(pub/sub) paradigm is the main communication model for Information-Centric Network(ICN) proposals.A key issue for pub/sub system is how to route the content objects to the correct subscribers,and ICN ... Publish/subscribe(pub/sub) paradigm is the main communication model for Information-Centric Network(ICN) proposals.A key issue for pub/sub system is how to route the content objects to the correct subscribers,and ICN is no exception.ICN network would be divided into core domain and many edge domains as today's internet does.HHR(Hierarchy Hybrid Routing scheme) is presented for ICN:A Chord-like routing scheme is used in core domain,while edge domains routing structure can be classified into three categories,Local Routing(LR),Delivery of Local Publication to Core domain(DLPC),and Remote Publication Routing into edge domain(RPR).LR can be decided by each edge domain,which determined by many factors,such as locality characteristic for pub/sub information and local policies.A hierarchical routing algorithm is proposed to solve DLPC and RPR simultaneously.Simulation results demonstrate that HHR can be fast deployed,and can be applied in large scale network or dynamic subscription environment. 展开更多
关键词 Information-Centric Network（ICN） publish/subscribe paradigm hierarchi-cal hybrid routing scheme （HHR） Chord
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A geographic routing protocol based on trunk line in VANETs 认领 引用 被引量：1
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作者 Chen Chen Huan Li +3 位作者 Xi’ang Li Jianlong Zhang Hong Wei Hao Wang 《Digital Communications and Networks》 SCIE EI CSCD 2021年第4期479-491,共13页
A Trunk Line Based Geographic Routing(TLBGR)protocol in Vehicular Ad-hoc Networks(VANETs)is proposed in this paper to solve the problem of data acquisition in the traditional trunk coordinated control system.Because o... A Trunk Line Based Geographic Routing(TLBGR)protocol in Vehicular Ad-hoc Networks(VANETs)is proposed in this paper to solve the problem of data acquisition in the traditional trunk coordinated control system.Because of the characteristics of short communication time and high packet loss among vehicles,the vehicles entering the trunk lines can not transmit their information to the trunk coordinated control system stably.To resolve this problem,the proposed protocol uses the trunk lines’traffic flow and the surrounding road network to provide a real-time data transmission routing scheme.It takes into account the data congestion problem caused by the large traffic flow of the main roads,which leads to the corresponding increase of the information flow of the section and the package loss,and the link partition problem caused by the insufficient traffic flow,which makes the vehicles have to carry and relay information thus increasing the transmission delay.The proposed TLBGR protocol can be divided into two stages:the next-intersection selection,and the next-hop selection in the chosen path between the current and next intersections.Simulation results show that,compared with other IoT routing protocols including Greedy Perimeter Stateless Routing(GPSR),Ad-hoc On Demand Vector(AODV),and Q-AODV,the TLBGR protocol has better performance in aspects of end-to-end delay,delivery rate,and routing cost under the scenario of urban traffic trunk lines.The TLBGR protocol can effectively avoid data congestion and local optimum problems,increase the delivery rate of data packets,and is therefore suitable for the routing requirements in this application scenario. 展开更多
关键词 VANETs AHP Data transmission routing scheme volume
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Adaptive clustering hierarchy routing for delay tolerant network 认领 引用 被引量：2
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作者 陶勇 王晓方 《Journal of Central South University》 SCIE EI CAS 2012年第6期1577-1582,共6页
Adaptive clustering hierarchy routing(ACHR) establishes a clusters-based hierarchical hybrid routing algorithm with two-hop local visibility for delay tolerant network(DTN).The major contribution of ACHR is the combin... Adaptive clustering hierarchy routing(ACHR) establishes a clusters-based hierarchical hybrid routing algorithm with two-hop local visibility for delay tolerant network(DTN).The major contribution of ACHR is the combination of single copy scheme and multi-copy scheme and the combination of hop-by-hop and multi-hop mechanism ACHR,which has the advantages in simplicity,availability and well-expansibility.The result shows that it can take advantage of the random communication opportunities and local network connectivity,and achieves 1.6 times delivery ratio and 60% overhead compared with its counterpart. 展开更多
关键词 delay tolerant network routing scheme congestion control hierarchy routing
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Improving Network Availability through Optimized Multipath Routing and Incremental Deployment Strategies 认领 引用 被引量：2
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作者 Wei Zhang Haijun Geng 《Computers, Materials & Continua》 SCIE EI 2024年第7期427-448,共22页
Currently,distributed routing protocols are constrained by offering a single path between any pair of nodes,thereby limiting the potential throughput and overall network performance.This approach not only restricts th... Currently,distributed routing protocols are constrained by offering a single path between any pair of nodes,thereby limiting the potential throughput and overall network performance.This approach not only restricts the flow of data but also makes the network susceptible to failures in case the primary path is disrupted.In contrast,routing protocols that leverage multiple paths within the network offer a more resilient and efficient solution.Multipath routing,as a fundamental concept,surpasses the limitations of traditional shortest path first protocols.It not only redirects traffic to unused resources,effectively mitigating network congestion,but also ensures load balancing across the network.This optimization significantly improves network utilization and boosts the overall performance,making it a widely recognized efficient method for enhancing network reliability.To further strengthen network resilience against failures,we introduce a routing scheme known as Multiple Nodes with at least Two Choices(MNTC).This innovative approach aims to significantly enhance network availability by providing each node with at least two routing choices.By doing so,it not only reduces the dependency on a single path but also creates redundant paths that can be utilized in case of failures,thereby enhancing the overall resilience of the network.To ensure the optimal placement of nodes,we propose three incremental deployment algorithms.These algorithms carefully select the most suitable set of nodes for deployment,taking into account various factors such as node connectivity,traffic patterns,and network topology.By deployingMNTCon a carefully chosen set of nodes,we can significantly enhance network reliability without the need for a complete overhaul of the existing infrastructure.We have conducted extensive evaluations of MNTC in diverse topological spaces,demonstrating its effectiveness in maintaining high network availability with minimal path stretch.The results are impressive,showing that even when implemented on just 60%of nodes,our incremental deployment method significantly boosts network availability.This underscores the potential of MNTC in enhancing network resilience and performance,making it a viable solution for modern networks facing increasing demands and complexities.The algorithms OSPF,TBFH,DC and LFC perform fast rerouting based on strict conditions,while MNTC is not restricted by these conditions.In five real network topologies,the average network availability ofMNTCis improved by 14.68%,6.28%,4.76%and 2.84%,respectively,compared with OSPF,TBFH,DC and LFC. 展开更多
关键词 Multipath routing network availability incremental deployment schemes genetic algorithm
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Improvisation of Node Mobility Using Cluster Routing-based Group Adaptive in MANET 认领 引用 被引量：1
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作者 J.Shanthini P.Punitha S.Karthik 《Computer Systems Science & Engineering》 SCIE EI 2023年第3期2619-2636,共18页
In today's Internet routing infrastructure,designers have addressed scal-ing concerns in routing constrained multiobjective optimization problems examining latency and mobility concerns as a secondary constrain.In... In today's Internet routing infrastructure,designers have addressed scal-ing concerns in routing constrained multiobjective optimization problems examining latency and mobility concerns as a secondary constrain.In tactical Mobile Ad-hoc Network(MANET),hubs can function based on the work plan in various social affairs and the internally connected hubs are almost having the related moving standards where the topology between one and the other are tightly coupled in steady support by considering the touchstone of hubs such as a self-sorted out,self-mending and self-administration.Clustering in the routing process is one of the key aspects to increase MANET performance by coordinat-ing the pathways using multiple criteria and analytics.We present a Group Adaptive Hybrid Routing Algorithm(GAHRA)for gathering portability,which pursues table-driven directing methodology in stable accumulations and on-request steering strategy for versatile situations.Based on this aspect,the research demonstrates an adjustable framework for commuting between the table-driven approach and the on-request approach,with the objectives of enhancing the out-put of MANET routing computation in each hub.Simulation analysis and replication results reveal that the proposed method is promising than a single well-known existing routing approach and is well-suited for sensitive MANET applications. 展开更多
关键词 Diplomatic mobile Ad-hoc network grouping mobility interior stable hybrid routing scheme adaptive switch structure clustering communication
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Potential field based hole detour routing algorithm in wireless sensor networks 认领 引用
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作者 李凤荣 Li +2 位作者 Lei Hu Maolin 《High Technology Letters》 EI CAS 2011年第2期119-125,共7页
The current geographic routing protocols arise data congestion if a multi-flow bypasses a hole simultaneously and excessive energy consumption of hole boundary nodes because these protocols tend to route data packets ... The current geographic routing protocols arise data congestion if a multi-flow bypasses a hole simultaneously and excessive energy consumption of hole boundary nodes because these protocols tend to route data packets along the boundaries of void areas （holes） by perimeter routing scheme.This scheme possibly enlarges the holes phenomenon （called hole diffusion problem） and shortens the life span of the network. A novel geographical routing algorithm based on a potential field approach （PFA） is proposed to deal with multiple holes scenario and restrict data to forward near boundary of a hole. That is, data packets are attracted to its sink and are repulsed away from the hole （s）. Simulation results show that PFA is superior to other protocols in terms of packet delivery ratio, network lifetime. 展开更多
关键词 geographic routing perimeter routing scheme hole diffusion potential field network lifetime
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Eco-environmental benefit assessment of China's South-North Water Transfer Scheme——the middle route project 认领 引用
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作者 DUANGuang-ming ZHAOJing-zhu LIUGuo-hua KEBing XIAOHan WUGang DENGHong-bing 《Journal of Environmental Sciences》 SCIE EI CAS 2004年第2期308-315,共8页
This paper assess the eco-environmental benefits that may come from the middle route project of China's South-North Water Transfer Scheme(SNWT) with principles and methods of eco-economics and planning reports of ... This paper assess the eco-environmental benefits that may come from the middle route project of China's South-North Water Transfer Scheme(SNWT) with principles and methods of eco-economics and planning reports of SNWT's middle route project. Some benefits were calculated in monetary units. To make sure that the results can be comparable with normal monetary indices, concrete assessment objects and the parameters are prudently selected according to the major characteristics of the project and its water import region. Primary assessment revealed that in different project construction stages, the benefit could be more than 13 07 billion RMB Yuan in 2010 and 19 79 billion RMB Yuan in 2030, respectively. The monetary value tends to increase with social-economic development. To realize these potential benefits, however, calls for more endeavors. 展开更多
关键词 China's South-North Water Transfer Scheme(SNWT) the middle route project of South-North Water Transfer(MRPSNWT) assessment ecosystem services monetary indices
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Interruption Tolerance Routing Strategy for Space Information Network 认领 引用 被引量：1
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作者 YANG Hai GUO Bingli +5 位作者 PANG Chengguang CUI Xinbin REN Huilin ZHOU Huichao KANG Chengbin HUANG Shanguo 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2022年第2期164-175,共12页
Frequent inter-satellite link(ISL)handovers will induce service interruption in large-scale space information networks,since traditional distributed/centralized routing strategy-based route convergence/update will con... Frequent inter-satellite link(ISL)handovers will induce service interruption in large-scale space information networks,since traditional distributed/centralized routing strategy-based route convergence/update will consume considerable time(compared with ground networks)derived from long ISL delay and flooding between hundreds or even thousands of satellites.During the network convergence/update stage,the lack of up-to-date forwarding information may cause severe packet loss.Considering the fact that ISL handovers for close-to-earth constellation are predictable and all the ISL handover information could be stored in each satellite during the network initialization,we propose a self-update routing scheme based on open shortest path first(OSPF-SUR)to address the slow route convergence problem caused by frequent ISL handovers.First,for predictable ISL handovers,forwarding tables are updated according to locally stored ISL handover information without link state advertisement(LSA)flooding.Second,for unexpected ISL failures,flooding could be triggered to complete route convergence.In this manner,network convergence time is radically descended by avoiding unnecessary LSA flooding for predictable ISL handovers.Simulation results show that the average packet loss rate caused by ISL handovers is reduced by 90.5%and 61.3%compared with standard OSPF(with three Hello packets confirmation)and OSPF based on interface state(without three Hello packets confirmation),respectively,during a period of topology handover.And the average endto-end delay is also decreased by 47.6%,9.6%,respectively.The packet loss rate of the proposed OSPF-SUR does not change along with the increase of the frequency of topology handovers. 展开更多
关键词 space information network inter-satellite link route convergence self-update routing scheme
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Estimating minimum ecological water required of the western route first stage project of China's south-to-north water transfer scheme for water exporting rivers 认领 引用
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作者 MEN Bao-hui 《Journal of Environmental Science and Engineering》 2007年第1期19-24,共6页
It is well known that there is abundant water resources in basin of the Yangtze River, the first largest river in China, which is mainly located in Southern China. However, water resources is very scarce in the basin ... It is well known that there is abundant water resources in basin of the Yangtze River, the first largest river in China, which is mainly located in Southern China. However, water resources is very scarce in the basin of the Yellow River, which is mainly located in Northern China. So the western route project of south-north water transfer scheme （WRP-SNWTS） aims to transfer water from the Yangtze River to the Yellow River. The area of WRP-SNWT, located in the upper reaches of the Yangtze River and the main areas of Sichuan and the marginal areas of the Qinghai-Tibet Plateau, has sufficient water resources but fragile ecology and environment. Therefore, it is necessary for WRP-SNWT to analyze the ecology water required. Based on the planning principles of from low elevation to high elevation, from small to large, from short to long and from easy to difficulty, the WRP-SNWT will be constructed through three stage projects. The western route first stage project of the south-north water transfer scheme （WRFST-SNWTS） is planned to transfer 4×10^9m^3/a from six tributaries of the Yalong river and from Dadu river to Jiaqu of Yellow River.. Daqu river and Niqu river are the branches of Xianshui river. Sequ river, Duke river, Make river and Ake river are the branches of Dadu river, which account for 65-70% of the total river run-off. It need more research and the rest run-off can satisfy channel ecology water required. According to analysis ecological water required which mainly satisfy for aquicolous biology in water-exporting region, such as low air temperature. Fish and aquicolous biology main living from May to August, and rivers are iced up from December to March of next year, ecology water required mainly for fish and aquicolous biology. The flow criterion of Tennant method is modified. The ecology water required of WRFSP-SNWTS is estimated by the flow data of Zhuwo gauging station, Zhuba gauging station, Chuosijia gauging station and Zumuzu gauging station. The result show that the ecology water required calculated by modified Tennant less 1 l percent than that of Tennant. This estimating result can supply more water resources for transferring to Yellow River. Meanwhile, this can supply gist for research transferring water of WRFSP-SNWTS. 展开更多
关键词 Yangtze River, Yellow River western route first stage project of the south-north water transfer scheme minimum ecological water required Tennant method
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Efficient Routing Protocol with Localization Based Priority&Congestion Control for UWSN 认领 引用
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作者 S.Sandhiyaa C.Gomathy 《Computers, Materials & Continua》 SCIE EI 2023年第3期4747-4768,共22页
The nodes in the sensor network have a wide range of uses,particularly on under-sea links that are skilled for detecting,handling as well as management.The underwater wireless sensor networks support collecting pollut... The nodes in the sensor network have a wide range of uses,particularly on under-sea links that are skilled for detecting,handling as well as management.The underwater wireless sensor networks support collecting pollution data,mine survey,oceanographic information collection,aided navigation,strategic surveillance,and collection of ocean samples using detectors that are submerged inwater.Localization,congestion routing,and prioritizing the traffic is the major issue in an underwater sensor network.Our scheme differentiates the different types of traffic and gives every type of traffic its requirements which is considered regarding network resource.Minimization of localization error using the proposed angle-based forwarding scheme is explained in this paper.We choose the shortest path to the destination using the fitness function which is calculated based on fault ratio,dispatching of packets,power,and distance among the nodes.This work contemplates congestion conscious forwarding using hard stage and soft stage schemes which reduce the congestion by monitoring the status of the energy and buffer of the nodes and controlling the traffic.The study with the use of the ns3 simulator demonstrated that a given algorithm accomplishes superior performance for loss of packet,delay of latency,and power utilization than the existing algorithms. 展开更多
关键词 Congestion aware routing angle-based forwarding scheme fitness function hard stage soft stage scheme
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Contention-Based Beaconless Real-Time Routing Protocol for Wireless Sensor Networks 认领 引用
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作者 Chao Huang Guoli Wang 《Wireless Sensor Network》 2010年第7期528-537,共10页
This paper presents a novel real-time routing protocol, called CBRR, with less energy consumption for wireless sensor networks (WSNs). End-to-End real-time requirements are fulfilled with speed or delay constraint at ... This paper presents a novel real-time routing protocol, called CBRR, with less energy consumption for wireless sensor networks (WSNs). End-to-End real-time requirements are fulfilled with speed or delay constraint at each hop through integrating the contention and neighbor table mechanisms. More precisely, CBRR maintains a neighbor table via the contention mechanism being dependent on wireless broadcast instead of beacons. Comprehensive simulations show that CBRR can not only achieve higher performance in static networks, but also work well for dynamic networks. 展开更多
关键词 Wireless Sensor Network Real-Time Routing Protocol Contention-Based Scheme Beaconless
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考虑碳排放的铁路物流储运一体化方案优化模型 认领 引用
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作者 王丹竹 周凌云 +1 位作者 陈诚 陈兵 《铁道运输与经济》 北大核心 2026年第8期64-72,共9页
在绿色发展与铁路物流市场化改革背景下,铁路物流企业为客户提供一体化、绿色化的仓储、运输及综合物流服务是重要改革方向之一。借鉴交通物流行业碳排放研究成果,提出铁路物流服务运输、仓储、装卸业务在不同能源消耗类型下的碳排放计... 在绿色发展与铁路物流市场化改革背景下,铁路物流企业为客户提供一体化、绿色化的仓储、运输及综合物流服务是重要改革方向之一。借鉴交通物流行业碳排放研究成果,提出铁路物流服务运输、仓储、装卸业务在不同能源消耗类型下的碳排放计算方法,以铁路储运一体化方案物流费用及碳排放费用作为双目标优化函数,采用加权标准化方法建立总目标函数,并考虑铁公联运与运到时限要求,构建包含碳排放的铁路物流储运一体化方案优化模型。通过仿真求解验证模型的科学性与适用性,研究结果显示,减少铁公联运换装次数对于降低碳排放存在较为显著的影响,通过协同规划到货时间窗与铁路运输方案,能够有效降低总物流费用。 展开更多
关键词 铁路物流 储运一体化 方案设计 碳排放 路径优化
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三线部署下高速铁路均匀簇首路由算法 认领 引用
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作者 孟建军 周奇 《铁道标准设计》 北大核心 2026年第5期204-210,229,共7页
【目的】针对高速铁路无线传感器网络的能量空洞问题,提出一种高速铁路沿线无线传感器网络粒子群优化均匀簇首路由协议。【方法】通过粒子群算法对簇首进行分区选举,实现簇首节点的均匀分布,提升网络寿命和节点存活率。此外,本研究还提... 【目的】针对高速铁路无线传感器网络的能量空洞问题,提出一种高速铁路沿线无线传感器网络粒子群优化均匀簇首路由协议。【方法】通过粒子群算法对簇首进行分区选举,实现簇首节点的均匀分布,提升网络寿命和节点存活率。此外,本研究还提出一种创新的节点部署策略,即高速铁路沿线无线传感器网络的能耗均匀的三线部署方案,该方案扩大传感器节点的覆盖范围,增强整个网络的能量。【结果】MATLAB仿真表明,与传统铁路沿线无线传感器网络双侧部署方案下的其他路由协议相比,三线部署下高速铁路无线传感器网络均匀簇首路由算法,使网络规模扩大150%,初始能量增加1.5倍,节点存活率提高36.84%,网络寿命延长3倍,显著提升网络性能和可靠性。【结论】研究成果有效解决高速铁路WSN的“能量空洞”问题提供参考。 展开更多
关键词 无线传感器网络 均匀簇首 路由协议 三线部署方案 线性带状区域
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基于区域协调发展战略的既有铁路增建二线广域路径探索——以精伊霍铁路为例 认领 引用
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作者 郑猛 佘世英 +2 位作者 黄焕 苏新春 朱勒德孜·叶山 《城市交通》 2026年第2期67-77,共11页
既有铁路复线化是铁路建设发展的重要领域,传统范式大多沿既有通道增建二线。研究提出一种基于区域协调发展战略的广域路径建模和比选方法,并以精伊霍铁路为例进行实证。在剖析项目必要性、紧迫性及原方案局限性的基础上,以广度优先搜... 既有铁路复线化是铁路建设发展的重要领域,传统范式大多沿既有通道增建二线。研究提出一种基于区域协调发展战略的广域路径建模和比选方法,并以精伊霍铁路为例进行实证。在剖析项目必要性、紧迫性及原方案局限性的基础上,以广度优先搜索和“橡皮筋”算法构建广域路径选择模型和比选方案,并从技术经济、工程实施、运营组织和综合效益4个维度共16项指标开展综合比较,进而提出近期可实施的优化方案及建议。研究表明:1)在存量优化背景下,铁路建设项目稀缺性日益凸显,基于区域协调发展战略的广域路径探索方法有助于改善单一工程视角的局限,为铁路复线化实践提供新思路;2)精伊霍铁路增建二线工程若采用博乐市至伊宁市直通线的推荐方案,在技术经济性、存量资源综合利用、降本增效和区域发展引领等方面,较原方案均具有显著优势和战略意义,下一步应重点针对天山穿越段开展工程深化论证。 展开更多
关键词 轨道交通 区域协调发展战略 既有铁路增建二线 方案比选 广域路径 精伊霍铁路
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孤峰河下段流域防洪除涝规划治理研究 认领 引用
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作者 闫东宇 强超 +1 位作者 仇知雨 耿浩杰 《海河水利》 2026年第7期46-51,共6页
孤峰河下段流域位于安徽省南陵县东部,地处青弋江与漳河交汇地带,是长江下游水阳江-青弋江-漳河“三江流域”的重要组成部分。该区域兼具山丘、平原和圩区复合地貌特征,水系结构复杂,上下游洪水叠加效应明显,防洪除涝体系面临较大压力... 孤峰河下段流域位于安徽省南陵县东部,地处青弋江与漳河交汇地带,是长江下游水阳江-青弋江-漳河“三江流域”的重要组成部分。该区域兼具山丘、平原和圩区复合地貌特征,水系结构复杂,上下游洪水叠加效应明显,防洪除涝体系面临较大压力。近年来,随着区域工程条件和水文情势的显著变化,原有防洪除涝体系已难以满足新时期经济社会发展需求。在评估流域现状防洪能力的基础上,制定了规划治理方案,并结合工程量、投资估算及实施可行性开展多方案比选,最终确定满足规划治理标准的最优工程方案;同时,通过调洪演算对工程规模进行了论证。研究成果可为山丘-平原-圩区复合型小流域地区防洪除涝规划提供参考。 展开更多
关键词 混合小流域 防洪除涝 方案比选 规模分析 调洪演算
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复杂采空区段高速公路地质选线与勘察控制探索 认领 引用
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作者 孔维伟 《路基工程》 2026年第4期22-28,共7页
本文以某高速公路为背景,开展大量专题研究,通过煤层采空区专项调查、综合物探技术、隧道风险评估及钻探工作进行不断反馈和相互验证。鉴于各区段地质概况和物探技术适用范围,对路基、隧道工点分别采用新型超高密度电法和大地电磁法进... 本文以某高速公路为背景,开展大量专题研究,通过煤层采空区专项调查、综合物探技术、隧道风险评估及钻探工作进行不断反馈和相互验证。鉴于各区段地质概况和物探技术适用范围,对路基、隧道工点分别采用新型超高密度电法和大地电磁法进行探测和成果研判。在某隧道的八个重大安全风险源(洞口失稳、溶洞洞害、坍方、涌突水(泥)、瓦斯灾害、采空区塌陷、结构失效、运营火灾)基础上,确定隧道单一风险事件及整体初始风险等级和残留风险等级,应用隧道安全风险评估成果指导地质选线工作。 展开更多
关键词 复杂山区 高速公路 地质选线 煤层采空区 调查勘探 风险评估 方案比选
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Optimal Evacuation Scheme Based on Dam-Break Flood Numerical Simulation 认领 引用 被引量：2
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作者 王晓玲 孙蕊蕊 +1 位作者 周正印 黄凌 《Transactions of Tianjin University》 EI CAS 2011年第6期424-430,共7页
The optimal evacuation scheme is studied based on the dam-break flood numerical simulation. A three- dimensional dam-break mathematical model combined with the volume of fluid （VOF） method is adopted. According to t... The optimal evacuation scheme is studied based on the dam-break flood numerical simulation. A three- dimensional dam-break mathematical model combined with the volume of fluid （VOF） method is adopted. According to the hydraulic information obtained from numerical simulation and selecting principles of evacuation emergency scheme, evacuation route analysis model is proposed, which consists of the road right model and random degree model. The road right model is used to calculate the consumption time in roads, and the random degree model is used to judge whether the roads are blocked. Then the shortest evacuation route is obtained based on Dijstra algorithm. Gongming Reservoir located in Shenzhen is taken as a case to study. The results show that industrial area I is flooded at 2 500 s, and after 5 500 s, most of industrial area II is submerged. The Hushan, Loucun Forest and Chaishan are not flooded around industrial area I and II. Based on the above analysis, the optimal evacuation scheme is determined. 展开更多
关键词 three-dimensional dam-break numerical model volume of fluid method evacuation route analysis model evacuation scheme
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