Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 730

会议视频 31

会议信息 1

年份

2024 1

2023 72

2022 92

2021 63

2020 59

2019 60

2018 51

2017 55

2016 37

2015 28

2014 28

2013 25

2012 36

2011 14

2010 25

2009 12

2008 19

2007 20

2006 7

2005 9

展开︾

关键词

优化 18

多目标优化 9

优化设计 8

工程前沿 8

2021全球工程前沿 7

遗传算法 6

中国铁路“走出去” 5

人工智能 5

智能制造 5

“走出去” 4

稳健设计 4

不确定性 3

能源 3

2022全球十大工程成就 2

2023全球十大工程成就 2

一阶分析法 2

中国铁路 2

五品联动 2

仿真优化 2

展开︾

检索范围：

排序：展示方式：

Independent continuous and mapping method of structural topology optimization based on the global stress

Yunkang SUI, Jili FENG, Hongling YE, Xirong PENG,

《机械工程前沿（英文）》 2010年第5卷第2期页码 130-142 doi: 10.1007/s11465-010-0011-3

摘要： There are three difficulties in topology optimization of continuum structures. 1) The topology under multiple load case is more difficult to be optimized than under single load case, because the former becomes a multiple objective based on compliance objective functions. 2) With local constraints, such as an elemental stress limit, the topology is more difficult to be solved than with global constraints, such as the displacement or frequency limits, because the sensitivity analysis of the former has very expensive computation. 3) With the phenomenon of load illness, which is similar with stiffness illness in the structural analysis, it is not easy to get the reasonable final topological structure, because it is difficult to consider different influences between the loads with small forces and big forces, and some topology paths of transferring small forces may disappear during the iteration process. To overcome difficulties above, four measures are adopted. 1) Topology optimization model is established by independent continuous mapping (ICM) method. 2) Based on the von Mises strength theory, all elements’ stress constraints are transformed into a structural energy constraint. 3) The phenomenon of load illness is divided to classify into three cases. 4) A strategy based on strain energy is proposed to adopt ICM method with stress globalization, and the problems of the above mentioned three cases of load illness are solved in terms of different complementary approaches. Several numerical examples show that the topology path of transferring forces can be obtained more easily by substituting global strain energy constraints for local stresses constraints, and the problem of load illness can be solved well by the weighting method that takes the structural energy as a weighting coefficient.

关键词： independent continuous mapping (ICM) method global stresses constraints topology optimization continuum structure load illness

HTML PDF 收藏

A discussion of objective function representation methods in global optimization

Panos M. PARDALOS, Mahdi FATHI

《工程管理前沿（英文）》 2018年第5卷第4期页码 515-523 doi: 10.15302/J-FEM-2018044

摘要：

Non-convex optimization can be found in several smart manufacturing systems. This paper presents a short review on global optimization (GO) methods. We examine decomposition techniques and classify GO problems on the basis of objective function representation and decomposition techniques. We then explain Kolmogorov’s superposition and its application in GO. Finally, we conclude the paper by exploring the importance of objective function representation in integrated artificial intelligence, optimization, and decision support systems in smart manufacturing and Industry 4.0.

关键词： global optimization decomposition techniques multi-objective DC programming Kolmogorov’s superposition space-filling curve smart manufacturing and Industry 4.0

HTML PDF 收藏

非线性调合调度问题的全局优化

Pedro A. Castillo Castillo Pedro M. Castro,Vladimir Mahalec

《工程（英文）》 2017年第3卷第2期页码 188-201 doi: 10.1016/J.ENG.2017.02.005

摘要：

汽油调合调度是炼油工业中的一个重要问题。一方面，该问题具有调度问题本身所具有的组合优化特性；另一方面，由于调合各种具有不同品质特性的物料，导致该优化问题的非凸性。本文提出一种新型的全局优化算法，用于求解基于连续时间汽油调合调度模型的混合整数非线性规划问题。该模型包含调合配方优化、分配问题及若干操作特性和约束；算法上采用分段McCormick 松弛(PMCR) 和规范多参数解聚(NMDT)，计算全局最优解的估计值，其松弛技术将双线性项中的一个变量值域进行分割，进而在每一个分段上产生凸松弛；通过增加分段数和缩减变量的值域，提高对全局最优解的估计。本文利用该算法求解四个案例，并与两个商业全局优化求解器和两个启发式算法进行比较，结果表明，本文提出的全局优化算法与商业求解器具有同等水平，但是在计算速度上稍逊于启发式算法。

关键词：全局优化非线性汽油调合连续时间调合模型分段线性松弛

HTML PDF 收藏

Web-based construction equipment fleet management system: cost-effective global and local allocation

Hakob AVETISYAN, Miroslaw SKIBNIEWSKI

《工程管理前沿（英文）》 2017年第4卷第1期页码 76-83 doi: 10.15302/J-FEM-2017012

摘要： Over the last two decades, construction contractors have been gradually making more investments in construction equipment to meet their needs associated with increasing volumes of construction projects. At present, from an operational perspective, almost all contractors pay more attention to maintaining their equipment fleets in well-sustained workable conditions and having a high accessibility of the necessary equipment pieces. However, such an approach alone is not enough to maintain an efficient and sustainable business. In particular, for large-scale construction companies that operate in multiple sites in the U.S. or overseas, the problem extends to an optimal allocation of available equipment. Given the current state of the construction industry in the U.S., this problem can be solved by geographically locating equipment pieces and then wisely re-allocating them among projects. Identifying equipment pieces geographically is a relatively easy task. The difficulty arises when informed decision-making is required for equipment allocation among job sites. The actual allocation of equipment should be both economically feasible and technologically preferable. To help in informed decision-making, an optimization model is developed as a mixed integer program. This model is formed based on a previously successfully developed decision-support model for construction equipment selection. The proposed model incorporates logical strategies of supply chain management to optimally select construction equipment for any construction site while taking into account the costs, availability, and transportation-related issues as constraints. The model benefits those responsible for informed decision-making for construction equipment selection and allocation. It also benefits the owners of construction companies, owing to its cost-minimization objective.

关键词： Construction equipment Equipment assignment optimization Web-based asset management

HTML PDF 收藏

Error analysis and optimization of a 3-degree of freedom translational Parallel Kinematic Machine

null

《机械工程前沿（英文）》 2014年第9卷第2期页码 120-129 doi: 10.1007/s11465-014-0300-3

摘要：

In this paper, error modeling and analysis of a typical 3-degree of freedom translational Parallel Kinematic Machine is presented. This mechanism provides translational motion along the Cartesian X-, Y- and Z- axes. It consists of three limbs each having an arm and forearm with prismatic-revolute-revolute-revolute joints. The moving or tool platform maintains same orientation in the entire workspace due to its joint arrangement. From inverse kinematics, the joint angles for a given position of tool platform necessary for the error modeling and analysis are obtained. Error modeling is done based on the differentiation of the inverse kinematic equations. Variation of pose errors along X, Y and Z directions for a set of dimensions of the parallel kinematic machine is presented. A non-dimensional performance index, namely, global error transformation index is used to study the influence of dimensions and its corresponding global maximum pose error is reported. An attempt is made to find the optimal dimensions of the Parallel Kinematic Machine using Genetic Algorithms in MATLAB. The methodology presented and the results obtained are useful for predicting the performance capability of the Parallel Kinematic Machine under study.

关键词： translational Parallel Kinematic Machine error modeling global error transformation index

HTML PDF 收藏

数据驱动选矿过程优化研究进展

丁进良, 杨翠娥, 柴天佑

《工程（英文）》 2017年第3卷第2期页码 183-187 doi: 10.1016/J.ENG.2017.02.015

摘要：

在全球化的市场环境下，经济和环境的因素对复杂工业生产过程综合生产指标的优化提出了更高的要求，如提高生产效率、提高产品质量和产量，以及降低能源和资源的利用。本文简述了基于数据驱动的混合智能优化方法和技术在提高选矿过程全流程运行指标性能方面的最新进展。首先描述了选矿工业过程全流程综合指标优化问题，进而对涉及的数据驱动的优化方法进行总结。该全流程综合指标优化包含四个层次：综合生产指标优化(月综合生产指标)、日综合生产指标优化、运行指标优化和自动化系统设定值优化。最后，本文给出了选矿过程数据驱动优化的未来研究方向。

关键词：数据驱动的优化方法生产全流程的全局优化选矿过程勘查

HTML PDF 收藏

Online gasoline blending with EPA Complex Model for predicting emissions

Stefan JANAQI, Mériam CHÈBRE, Guillaume PITOLLAT

《工程管理前沿（英文）》 2018年第5卷第2期页码 214-226 doi: 10.15302/J-FEM-2017022

摘要： The empirical Complex Model developed by the US Environmental Protection Agency (EPA) is used by refiners to predict the toxic emissions of reformulated gasoline with respect to gasoline properties. The difficulty in implementing this model in the blending process stems from the implicit definition of Complex Model through a series of disjunctions assembled by the EPA in the form of spreadsheets. A major breakthrough in the refinery-based Complex Model implementation occurred in 2008 and 2010 through the use of generalized disjunctive and mixed-integer nonlinear programming (MINLP). Nevertheless, the execution time of these MINLP models remains prohibitively long to control emissions with our online gasoline blender. The first objective of this study is to present a new model that decreases the execution time of our online controller. The second objective is to consider toxic thresholds as hard constraints to be verified and search for blends that verify them. Our approach introduces a new way to write the Complex Model without any binary or integer variables. Sigmoid functions are used herein to approximate step functions until the measurement precision for each blend property is reached. By knowing this level of precision, we are able to propose an extremely good and differentiable approximation of the Complex Model. Next, a differentiable objective function is introduced to penalize emission values higher than the threshold emissions. Our optimization module has been implemented and tested with real data. The execution time never exceeded 1 s, which allows the online regulation of emissions the same way as other traditional properties of blended gasoline.

关键词： emissions reformulated gasoline online control global optimization

HTML PDF 收藏

MSSSA：一种针对全局优化问题的多策略增强型麻雀搜索算法 Research Article

孟凯1,2,陈晨1,2,辛斌1,2

《信息与电子工程前沿（英文）》 2022年第23卷第12期页码 1828-1847 doi: 10.1631/FITEE.2200237

摘要：麻雀搜索算法(SSA)是一种新的元启发式优化方法，具有简单和灵活的优点。然而，在处理多模态优化问题时，该算法仍存在早熟收敛、探索与开发不平衡等缺陷。针对上述问题，本文提出一种多策略增强的麻雀搜索算法(MSSSA)。首先，引入混沌映射以获取高质量的初始种群，并采用对立学习策略增加种群的多样性。其次，设计了一种自适应参数控制策略，以在全局探索与局部开发之间保持适当的平衡。最后，在个体更新阶段嵌入混合扰动机制，以避免算法陷入局部最优。为了验证所提方法的有效性，在IEEE CEC2014和IEEE CEC2019测试集的40个函数，以及10个不同维度的经典函数上进行了大量的实验。实验结果表明，与一些先进的算法相比，所提出的MSSSA表现出突出的优化性能。该算法还成功地应用于两个工程优化问题，证明了MSSSA在解决实际问题方面的优越性。

关键词：群智能；麻雀搜索算法；自适应参数控制策略；混合扰动机制；优化问题

HTML PDF 收藏

SUSTAINABLE NITROGEN MANAGEMENT INDEX: DEFINITION, GLOBAL ASSESSMENT AND POTENTIAL IMPROVEMENTS

《农业科学与工程前沿（英文）》 2022年第9卷第3期页码 356-365 doi: 10.15302/J-FASE-2022458

摘要：

● A composite N management index is proposed to measure agriculture sustainability.

关键词： global assessment indicator nitrogen management sustainable agriculture sustainable development goals

HTML PDF 收藏

Engineering management: Global engineering research frontiers

Botao ZHONG, Luting QIU

《工程管理前沿（英文）》 2020年第7卷第1期页码 159-162 doi: 10.1007/s42524-020-0094-4

HTML PDF 收藏

MANURE AND METROPOLES---A GLOBAL FRAMEWORK FOR NUTRIENT CYCLING IN FOOD SYSTEMS

《农业科学与工程前沿（英文）》 2021年第8卷第1期

HTML PDF 收藏

Soil security and global food security

《农业科学与工程前沿（英文）》 doi: 10.15302/J-FASE-2023530

摘要：

● Much of the world’s agricultural land has been degraded through soil loss and degradation of soil organic matter.

关键词： Agriculture soil security food security regenerative

HTML PDF 收藏

Characteristics of plankton Hg bioaccumulations based on a global data set and the implications for aquatic

《环境科学与工程前沿（英文）》 2022年第16卷第3期 doi: 10.1007/s11783-021-1471-x

摘要：

• Hg bioaccumulation by phytoplankton varies among aquatic ecosystems.

关键词： Plankton Hg bioaccumulation Physiological characteristics A cross-system analysis Nutrient compositions Global data set

HTML PDF 收藏

CORRECTION to: A global carbon market?

Michael G. POLLITT

《工程管理前沿（英文）》页码 699-699 doi: 10.1007/s42524-019-0050-3

HTML PDF 收藏

Evaluation of global niobium flow modeling and its market forecasting

《能源前沿（英文）》 2023年第17卷第2期页码 286-293 doi: 10.1007/s11708-022-0823-y

摘要： Metal, as the indispensable material, is functioning the society from technology to the environment. Niobium (Nb) is considered a unique earth metal as it is related to many emerging technologies. The increasing economic growth exerts an increasing pressure on supply, which leads to its significance in the economic sector. However, few papers have addressed Nb sustainability, which forms the scope of this paper in order to start the process of Nb market forecasting based on some previous data and some assumptions. Therefore, this paper will discuss different thoughts in material substitution and the substance flow of Nb throughout a static flow using Nb global data to have a better understanding of the process of Nb from production to end of life. This shall lead to the identification of the market needs to determine its growth which is around 2.5% to 3.0%. Moreover, due to China’s huge Nb consumption which comes from the continuous development that is happening over the years, it will also briefly mention the Nb situation as well as its growth which according to statistics will grow steadily till 2030 by a rate of 4.0% to 6.0%. The results show that there should be some enhancement to Nb recycling potentials out of steel scrap. In addition, there should be more involvement of Nb in different industries as this would lead to less-used materials which can be translated to less environmental impact.

关键词： niobium (Nb) sustainability substance flow analysis recycling industrial ecology