基于组合双向拍卖的云资源调度方法

针对跨数据中心的资源调度问题，提出了一种基于组合双向拍卖（PCDA）的资源调度方案。首先，将云资源拍卖分为三个部分：云用户代理报价、云资源提供商要价、拍卖代理组织拍卖；其次，在定义用户的优先级及任务紧迫度的基础上，在拍卖过程中估算每一个工作发生的服务等级协议（SLA）违规并以此计算云提供商的收益，同时每轮竞拍允许成交多项交易；最终达到根据用户等级合理分配云资源调度的效果。仿真实验结果表明该算法保证了竞拍成功率，与传统一次拍卖成交一项的组合双向拍卖方案相比，PCDA在竞拍时间段产生的能耗降低了35.00%，拍卖云提供商的利润提高了约38.84%。     

Entwicklung eines Transformationsmodells – Modularisierung schrittweise gedacht

For some years now, the process industry has been meeting the challenges of the markets with modular production and logistics concepts. This article presents this development process in the form of a four-stage transformation model. It is shown that the path towards modular production environments can be taken step by step. The motto is “evolution instead of revolution”. First, an overview of the state of the art of modularized production and logistics systems is given. Based on this, the article describes and classifies the four different stages of modularization.     

Feasibility assessment of a container ship applying ammonia cracker-integrated solid oxide fuel cell technology

The maritime industry has entered its pathway of decarbonization. To achieve the IMO's ambitious goals of an absolute emissions reduction of 50% by 2050, and a 70% carbon intensity reduction by 2050 compared to the 2008 level, various options for the adoption of technologies and alternative fuels are considered by the market stakeholders.Ammonia, one of the most promising alternative marine fuels has long been considered to reduce carbon emissions. And solid oxide fuel cell is expected to transform ship propulsion technology in the future due to its high utilization of fuels. In this paper, a feasibility study is performed to assess the application of an ammonia cracker-integrated solid oxide fuel cell (hereafter as Ammonia SOFC) system on an ocean-going vessel through a detailed CAPEX, FuelEX, OPEX, Carbon tax, and carbon emission analysis. Comparison is made with direct ammonia, LNG and conventional fuels fired heat engines. The result concludes that it can be economically viable to apply to deep-sea shipping, compared to other marine fuels and propulsion technologies.     

Heuristics for solving continuous berth allocation problem considering periodic balancing utilization of cranes

This study investigates a berth allocation problem considering the periodic balancing utilization of quay cranes in container terminals. The proposed model considers that the quay cranes allocated to a work shift should be fully used and other real-world considerations, such as the continuous quay line, the penalties for early arrivals and departure delays. To solve the model, several heuristics are developed: the model for large problems is decomposed into sub-models that are solved by rolling-horizon heuristics; neighborhood search heuristics are used for optimizing a berthing order of vessels; parallel computing is used to improve the algorithmic performance. The method performs well when applied to real-world large-scale instances with promising computation time that is linearly related to the number of vessels.     

让历史重归城市——以哈尔滨花园街历史街区概念设计为例

哈尔滨花园街历史街区概念设计提出"容器"的概念,即把城市和街区比作不同层次的"容器",认为历史街区之所以没落是因为"容器"本身的破败和其功能不能满足现代需求,因此对"容器"本身及其内容进行更新是街区重新恢复活力的途径."容器"本身的更新包括对地面空间的保护、更新及对地下空间的开发、利用."容器"内容的更新包括功能置换和人口置换.     

经验?贵阳花溪摆陇苗寨民俗综合体实践

文章通过对贵阳花溪摆陇苗寨民俗综合体实践中的"经验"碎片的清理,试图从中把握"经验"的脉络,理顺各种"经验"之间的相互关系,并将之投射于建造,唤醒泯灭在物化建造中的活生生的身体知觉。     

Bayesian network construction from event log for lateness analysis in port logistics

The handling of containers in port logistics consists of several activities, such as discharging, loading, gate-in and gate-out, among others. These activities are carried out using various equipment including quay cranes, yard cranes, trucks, and other related machinery. The high inter-dependency among activities and equipment on various factors often puts successive activities off schedule in real-time, leading to undesirable activity down time and the delay of activities. A late container process, in other words, can negatively affect the scheduling of the following ones. The purpose of the study is to analyze the lateness probability using a Bayesian network by considering various factors in container handling. We propose a method to generate a Bayesian network from a process model which can be discovered from event logs in port information systems. In the network, we can infer the activities’ lateness probabilities and, sequentially, provide to port managers recommendations for improving existing activities.     

聚乙烯高整体容器多年累积剂量的近似计算方法

高整体容器(HIC)是一种经特殊设计制造的具有高强度、高密封性、高化学稳定性和高热稳定性的低、中水平放射性废物处置容器。对于聚乙烯材料制作的高整体容器,其在设计和使用过程中存在一个重要的指标,即辐照稳定性。本文介绍一种高整体容器累积剂量的计算方法,并使用此方法对AP1000核电工程中使用的聚乙烯高整体容器累积剂量进行估算。通过与Micro Shield、MCNP程序计算的结果比较,证明该方法是一种保守的、偏安全的并可用于实践的高整体容器累积剂量计算方法。     

A parallel multi-population biased random-key genetic algorithm for a container loading problem

This paper presents a multi-population biased random-key genetic algorithm (BRKGA) for the single container loading problem (3D-CLP) where several rectangular boxes of different sizes are loaded into a single rectangular container. The approach uses a maximal-space representation to manage the free spaces in the container. The proposed algorithm hybridizes a novel placement procedure with a multi-population genetic algorithm based on random keys. The BRKGA is used to evolve the order in which the box types are loaded into the container and the corresponding type of layer used in the placement procedure. A heuristic is used to determine the maximal space where each box is placed. A novel procedure is developed for joining free spaces in the case where full support from below is required. The approach is extensively tested on the complete set of test problem instances of Bischoff and Ratcliff [1] and Davies and Bischoff [2] and is compared with 13 other approaches. The test set consists of 1500 instances from weakly to strongly heterogeneous cargo. The computational experiments demonstrate that not only the approach performs very well in all types of instance classes but also it obtains the best overall results when compared with other approaches published in the literature.     

基于嵌套问题的半圆轴瓦单元化装箱设计与容器选择

针对工厂不规则形状工件单元化装箱与搬运的实际需要,以汽车与发动机行业常见的内凹形状的半圆轴瓦为代表,研究它的单元化装箱和最终标准容器的选择,提出半圆轴瓦等同件装箱过程中的特殊嵌套问题.这一嵌套问题不同于常见的平面下料嵌套问题,是将三维物体简化为二维问题来考虑,既有嵌套,也有装箱.分析嵌套柱形成的几何关系,将嵌套柱看作长...