Liner services network design and fleet deployment with empty container repositioning

Transportation demand of shipping container fluctuates due to the seasonality of international trade, thus, every 3–6 months, the liner company has to alter its current liner shipping service network, redeploy ships and design cargo routes with the objective of minimizing the total cost. To solve the problem, the paper presents a mixed integer linear program model. The proposed model incorporates several relevant constraints, such as weekly frequency, the transshipment of cargo between two or more service routes, and transport time. Extensive numerical experiments based on realistic date of Asia–Europe–Oceania shipping operations show that the proposed model can solve real-case problems efficiently by CPLEX. The results demonstrate that the model can reduce ship’s capacity consumption and raise ships’ capacity utilization.     

Quantum computation based bundling optimization for combinatorial auction in freight service procurements

Combinatorial auction is a useful trade manner for transportation service procurements in e-marketplaces. To enhance the competition of combinatorial auction, a novel auction mechanism of two-round bidding with bundling optimization is proposed. As the recommended the auction mechanism, the shipper/auctioneer integrates the objects into several bundles based on the bidding results of first round auction. Then, carriers/bidders bid for the object bundles in second round. The bundling optimization is described as a multi-objective model with two criteria on price complementation and combination consistency. A Quantum Evolutionary Algorithm (QEA) with β-based rotation gate and the encoding scheme based on non-zero elements in complementary coefficient matrix is developed for the model solution. Comparing with a Contrast Genetic Algorithm, QEA can achieve better computational performances for small and middle size problems.     

龙滩水电站地下厂房进水口高边坡加固支护设计

龙滩水电站地下厂房进水口高边坡开挖坡高达435m，坡面面积达27万m^2，为典型的反倾向层状结构岩质高边坡。为了确保进水口坝段的稳定，必须保持边坡岩体有足够的稳定性，通过采取边坡轮廓设计，防渗、排水设计，加固支护设计及施工控制等一系列措施，确保边坡稳定。文章简要论述了边坡设计的原则、标准、高边坡轮廓设计、防渗排水系统、加固支护措施、施工控制等情况。     

全球宽带电话市场分析

近两年．IP电话又叫网络电话的发展受到全球的关注。随着宽带接入的发展，基于宽带接入提供的网络电话具有了更大的生命力。从宽带电话的经营模式出发，探究这类业务的出现时现有话音业务市场的影响，进而分析这类业务的发展前景。     

土钉墙技术在华丰湾堤防工程边坡支护中的应用

在华丰湾堤防工程施工中 ,为防止因边坡开挖而造成附近房屋出现裂缝问题 ,经论证决定采用土钉墙技术对堤基开挖进行边坡支护 ;经实施 ,堤基开挖顺利 ,附近房屋无任何位移与沉降迹象。     

MON--未来城域网的发展方向

阐述了城域光网络(MON)技术的出现背景、定义、技术方案和特点，以及与现有城域基础设施的比较，突出说明了其应用上的竞争优势。最后介绍了MON的现状和前景展望。     

边坡支护中多种技术措施的综合应用

通过工程实例,介绍了锚杆喷射混凝土支护技术与高压喷射混凝土搅拌桩支护技术在工程中的综合利用,同时也验证了该技术的可行性及经济性。     

浅谈托辊的开发与实践

本钢１７００连轧机应用的托辊原由外企业制作，为了减少公司资金外流，公司技术人员和工人结合现有的生产条件，先后攻克了辊身铸造和加工，托辊装配等工艺方面的难关，研制成功了合格的产品，年创经济效益８０万元。     

跟踪世界先进技术 振兴我国智能网产业

本文全面介绍了我国跟踪智能网世界先进技术，研究开发自主产权的国产智能网情况，简述了国产主流产品ＣＩＮ系列智能网产品产业化和应用情况，对国产智能网的发展应用和产业化提出了建议。     

柳海矿运输大巷返修工程深部软岩支护设计研究

通过现场调查、室内试验以及理论分析,柳海矿运输大巷支护现状进行分析研究,总结破坏原因。根据现场工程地质条件、岩石特性和破坏特点,确定软岩变形力学机制为高应力膨胀性软岩,并提出采用预留刚隙柔层支护技术进行支护。