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A rank-based multiple-choice secretary algorithm for minimising microgrid operating cost under uncertainties

《能源前沿（英文）》 2023年第17卷第2期页码 198-210 doi: 10.1007/s11708-023-0874-8

摘要： The increasing use of distributed energy resources changes the way to manage the electricity system. Unlike the traditional centralized powered utility, many homes and businesses with local electricity generators have established their own microgrids, which increases the use of renewable energy while introducing a new challenge to the management of the microgrid system from the mismatch and unknown of renewable energy generations, load demands, and dynamic electricity prices. To address this challenge, a rank-based multiple-choice secretary algorithm (RMSA) was proposed for microgrid management, to reduce the microgrid operating cost. Rather than relying on the complete information of future dynamic variables or accurate predictive approaches, a lightweight solution was used to make real-time decisions under uncertainties. The RMSA enables a microgrid to reduce the operating cost by determining the best electricity purchase timing for each task under dynamic pricing. Extensive experiments were conducted on real-world data sets to prove the efficacy of our solution in complex and divergent real-world scenarios.

关键词： energy management systems demand response scheduling under uncertainty renewable energy sources multiple-choice secretary algorithm

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Optimal design of steel skeletal structures using the enhanced genetic algorithm methodology

Tugrul TALASLIOGLU

《结构与土木工程前沿（英文）》 2019年第13卷第4期页码 863-889 doi: 10.1007/s11709-019-0523-9

摘要： This study concerns with the design optimization of steel skeletal structures thereby utilizing both a real-life specification provisions and ready steel profiles named hot-rolled I sections. For this purpose, the enhanced genetic algorithm methodology named EGAwMP is utilized as an optimization tool. The evolutionary search mechanism of EGAwMP is constituted on the basis of generational genetic algorithm (GGA). The exploration capacity of EGAwMP is improved in a way of dividing an entire population into sub-populations and using of a radial basis neural network for dynamically adjustment of EGAwMP’s genetic operator parameters. In order to improve the exploitation capability of EGAwMP, the proposed neural network implementation is also utilized for prediction of more accurate design variables associating with a new design strategy, design codes of which are based on the provisions of LRFD_AISC V3 specification. EGAwMP is applied to determine the real-life ready steel profiles for the optimal design of skeletal structures with 105, 200, 444, and 942 members. EGAwMP accomplishes to increase the quality degrees of optimum designations Furthermore, the importance of using the real-life steel profiles and design codes is also demonstrated. Consequently, EGAwMP is suggested as a design optimization tool for the real-life steel skeletal structures.

关键词： design optimization genetic algorithm multiple populations neural network

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Group-based multiple pipe routing method for aero-engine focusing on parallel layout

《机械工程前沿（英文）》 2021年第16卷第4期页码 798-813 doi: 10.1007/s11465-021-0645-3

摘要： External pipe routing for aero-engine in limited three-dimensional space is a typical nondeterministic polynomial hard problem, where the parallel layout of pipes plays an important role in improving the utilization of layout space, facilitating pipe assembly, and maintenance. This paper presents an automatic multiple pipe routing method for aero-engine that focuses on parallel layout. The compressed visibility graph construction algorithm is proposed first to determine rapidly the rough path and interference relationship of the pipes to be routed. Based on these rough paths, the information of pipe grouping and sequencing are obtained according to the difference degree and interference degree, respectively. Subsequently, a coevolutionary improved differential evolution algorithm, which adopts the coevolutionary strategy, is used to solve multiple pipe layout optimization problem. By using this algorithm, pipes in the same group share the layout space information with one another, and the optimal layout solution of pipes in this group can be obtained in the same evolutionary progress. Furthermore, to eliminate the minor angle deviation of parallel pipes that would cause assembly stress in actual assembly, an accurate parallelization processing method based on the simulated annealing algorithm is proposed. Finally, the simulation results on an aero-engine demonstrate the feasibility and effectiveness of the proposed method.

关键词： multiple pipe routing optimization algorithm aero-engine pipe grouping parallel layout

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Supplier selection and order splitting in multiple-sourcing inventory systems

WANG Guicong, JIANG Zhaoliang, LI Zhaoqian, LIU Wenping

《机械工程前沿（英文）》 2008年第3卷第1期页码 23-27 doi: 10.1007/s11465-008-0016-3

摘要： Supplier selection and inventory control are critical decision processes in single-item multiple-supplier systems. An integer linear programming model is proposed to help managers determine the reorder level, choose the best suppliers, and place the optimum order quantities so that the total average inventory cost is minimum, and constraints of supplier ability, quality, and demand are considered. An algorithm combining the branch-bound algorithm and enumeration algorithm is developed to solve the problems. Application of the proposed model in an automobile industry shows that it is effective.

关键词： automobile industry branch-bound algorithm selection single-item multiple-supplier effective

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Image automatic mosaics based on contour phase correlation

ZHANG Jing, HU Zhiping, OU Zongying, LIU Zhitai

《机械工程前沿（英文）》 2007年第2卷第2期页码 228-234 doi: 10.1007/s11465-007-0040-8

摘要： The image planar mosaics is studied, and an image automatic mosaics algorithm on the basis of contour phase correlation is proposed in this paper. To begin with, by taking into account mere translations and rotations between images, a contour phase correlation algorithm is used to realize the preliminary alignments of images, and the initial projective transformation matrices are obtained. Then, an optimization algorithm is used to optimize the initial projective transformation matrices, and complete the precise image mosaics. The contour phase correlation is an improvement on the conventional phase correlation in two aspects: First, the contours of images are extracted, and the phase correlation is applied to the contours of images instead of the whole original images; Second, when there are multiple peak values approximate to the maximum peak value in the ? function array, their corresponding translations can be regarded as candidate translations and calculated separately, and the best translation can be determined by the optimization of conformability of two images in the overlapping area. The running results show that the proposed algorithm can consistently yield high-quality mosaics, even in the cases of poor or differential lighting conditions, existences of minor rotations, and other complicated displacements between images.

关键词： function conventional multiple algorithm correlation algorithm

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分层空时码多载波CDMA的译码与检测

杨洁,酆广增

《中国工程科学》 2007年第9卷第1期页码 58-62

摘要：

研究V－BLAST MIMO MC－CDMA下行系统。提出了一种对每个子载波进行V－BLAST译码的非线性算法，对不同天线数、用户数情况进行了系统的仿真和分析，并对V－BLAST译码的线性和非线性算法进行了系统仿真比较。

关键词：多输入多输出正交频分复用分层空时码迫零算法最小均方误差

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Is servitization of construction the inevitable choice of Internet Plus construction?

Hongwei WANG, Dian LIU

《工程管理前沿（英文）》 2017年第4卷第2期页码 229-230 doi: 10.15302/J-FEM-2017104

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Life cycle analysis and choice of natural gas-based automotive alternative fuels in Chongqing Municipality

WU Rui, LI Guangyi, ZHANG Zongyi, REN Yulong, HAN Weijian

《环境科学与工程前沿（英文）》 2007年第1卷第3期页码 292-298 doi: 10.1007/s11783-007-0049-6

摘要： Road transport produces significant amounts of emissions by using crude oil as the primary energy source. A reduction of emissions can be achieved by implementing alternative fuel chains. The objective of this study is to carry out an economic, environmental and energy (EEE) life cycle study on natural gas-based automotive fuels with conventional gasoline in an abundant region of China. A set of indices of four fuels/vehicle systems on the basis of life cycle are assessed in terms of impact of EEE, in which natural gas produces compressed natural gas (CNG), methanol, dimethylether (DME) and Fischer Tropsch diesel (FTD). The study included fuel production, vehicle production, vehicle operation, infrastructure and vehicle end of life as a system for each fuel/vehicle system. A generic gasoline fueled car is used as a baseline. Data have been reviewed and modified based on the best knowledge available to Chongqing local sources. Results indicated that when we could not change electric and hydrogen fuel cell vehicles into commercial vehicles on a large scale, direct use of CNG in a dedicated or bi-fuel vehicle is an economical choice for the region which is most energy efficient and more environmental friendly. The study can be used to support decisions on how natural gas resources can best be utilized as a fuel/energy resource for automobiles, and what issues need to be resolved in Chongqing. The models and approaches for this study can be applied to other regions of China as long as all the assumptions are well defined and modified to find a substitute automotive energy source and establish an energy policy in a specific region.

关键词： dedicated primary economic alternative abundant

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一种跟踪性能不占优的多无人机协同目标跟踪方法 Research Articles

郑之,蔡舜诚

《信息与电子工程前沿（英文）》 2021年第22卷第10期页码 1334-1350 doi: 10.1631/FITEE.2000362

摘要：目标跟踪是无人机领域研究热点之一。本文针对无人机跟踪性能不占优，以及目标具有灵活、智能运动特征的情形，研究了多无人机协同目标跟踪问题。提出一种基于目标意图估计的多无人机协同跟踪策略。首先设计了一种具有降维和最大感知覆盖约束的轨迹特征提取方法，以降低无人机跟踪代价，并对目标典型的3类运动模式，根据环境和目标轨迹主要特征，设计了一种意图估计方法；然后，设计了一种在障碍物环境中基于最小可达距离和最小转角代价的MDA-Voronoi图，证明分析了目标被感知的概率；接着，设计了无人机的协同跟踪策略，以减小目标跟踪丢失的间隙，增加目标被感知的时间；通过纳什Q学习方法，在奖励函数中考虑了避障、跟踪代价、感知质量、飞行约束等因素，将最优动作策略作为无人机的控制输入。最后，通过仿真验证了本文方法能在无人机跟踪性能不占优的情况下提高跟踪质量。

关键词：协同跟踪；意图估计；MDA-Voronoi图；多无人机；性能不占优

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新京沪铁路最优化选择——时速200公里快速轮轨

李玉山

《中国工程科学》 2004年第6卷第12期页码 7-12

摘要：

从中国13亿人口的有效需求出发，汲取“铱星”通讯系统和超声速“协和”号飞机运营失败的教训，提出了新京沪铁路投资建设必须选择“最优化"而不是“最高速”；在中长距离上，选择8～12h旅行时间的“夕发朝至"列车具有最优化性价比；论述了中国铁路发展目标的最优化选择——时速200 km的电气化快速轮轨技术，符合幅员辽阔的中国现实社会经济基础发展的需要，符合中国的国情；分析了在能源危机日益深重的历史时代，时速400 km的“磁悬浮”和时速300 km的“高速轮轨”将造成国家难以承受的社会经济资源的巨大浪费和运营亏损。

关键词：京沪铁路最优化选择磁悬浮高速轮轨时速200 km快速轮轨

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农业软件产业发展的现实格局与路径选择

马晨,李瑾,张骞,冯献,揭晓婧

《中国工程科学》 2021年第23卷第4期页码 19-29 doi: 10.15302/J-SSCAE-2021.04.003

摘要：

信息技术与现代农业发展的交叉重组、渗透融合不断加速，逐步孕育出农业软件产业，支撑了智慧农业发展。本文在分析国内外农业软件产业发展战略、概述学术界相关研究的基础上，结合实际调研数据，梳理了我国农业软件产业的发展现状、主要困境，提出了我国农业软件产业发展的战略目标、重大工程及政策保障建议。研究发现，我国农业软件产业在技术研发与推广、企业运行、用户积累等方面与国外存在较大差距，主要存在开发难度大、创新能力弱、投资回报低、知识产权保护弱等困境；面向2035年，应以推动农业技术软件化为主线，以强化农业软件产业创新发展能力为核心，开展农业使能软件与平台开发工程、精准农业管理软件应用推广工程、农业软件产业集聚区创建工程、农业软件企业梯次培育工程等重大工程建设。为此建议，完善政策支持体系建设、强化统筹协调机制、优化学科体系建设、加强人才培养全面保障我国农业产业软件的高质量发展。

关键词：农业软件产业，特征分类，现实格局，路径选择，重大工程建议

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靠改革重组插上腾飞翅膀靠加强自身实力赢得市场——访中国石化工程建设公司总经理兼党委书记杨光

石宣

《中国工程科学》 1999年第1卷第3期页码 93-93

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效率不确定下企业物流管理模式的柔性选择研究

张红波,罗一新

《中国工程科学》 2008年第10卷第9期页码 88-91

摘要：

分析了物流管理模式及我国物流管理现状，通过建立模型，采用实物期权分析方法，得到了物流服务效率不确定条件下企业从自营物流管理模式转向采用第三方物流管理模式的门槛值。分析结果表明，自营物流服务的效率、企业原有资产的损失及交易成本的大小、物流服务效率提高速度的快慢与物流服务效率的不确定程度，会对企业物流管理模式的选择产生重要影响。

关键词：企业物流管理模式实物期权自营物流第三方物流柔性选择

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An assessment of surrogate fuel using Bayesian multiple kernel learning model in sight of sooting tendency

《能源前沿（英文）》 2022年第16卷第2期页码 277-291 doi: 10.1007/s11708-021-0731-6

摘要： An integrated and systematic database of sooting tendency with more than 190 kinds of fuels was obtained through a series of experimental investigations. The laser-induced incandescence (LII) method was used to acquire the 2D distribution of soot volume fraction, and an apparatus-independent yield sooting index (YSI) was experimentally obtained. Based on the database, a novel predicting model of YSI values for surrogate fuels was proposed with the application of a machine learning method, named the Bayesian multiple kernel learning (BMKL) model. A high correlation coefficient (0.986) between measured YSIs and predicted values with the BMKL model was obtained, indicating that the BMKL model had a reliable and accurate predictive capacity for YSI values of surrogate fuels. The BMKL model provides an accurate and low-cost approach to assess surrogate performances of diesel, jet fuel, and biodiesel in terms of sooting tendency. Particularly, this model is one of the first attempts to predict the sooting tendencies of surrogate fuels that concurrently contain hydrocarbon and oxygenated components and shows a satisfying matching level. During surrogate formulation, the BMKL model can be used to shrink the surrogate candidate list in terms of sooting tendency and ensure the optimal surrogate has a satisfying matching level of soot behaviors. Due to the high accuracy and resolution of YSI prediction, the BMKL model is also capable of providing distinguishing information of sooting tendency for surrogate design.

关键词： sooting tendency yield sooting index Bayesian multiple kernel learning surrogate assessment surrogate formulation