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2017 7th International Conference on Modeling, Simulation, and Applied Optimization (ICMSAO)最新文献

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Green Traveling Purchaser Problem model: A bi-objective optimization approach 绿色旅游购买者问题模型:双目标优化方法
Sadeque Hamdan, R. Larbi, Ali Cheaitou, I. Alsyouf
The green traveling purchaser problem (GTPP) is a generalization of the Traveling Purchaser Problem which consists of selecting suppliers, allocating orders and choosing the best routes, while minimizing the purchasing and traveling costs and CO2 emissions. The two objective functions pertaining to minimization of CO2 emissions and purchasing costs are in some cases conflicting and are thus considered separately. This paper presents an exact method to solve the proposed bi-objective optimization model where the bi-objective mathematical model is transformed into a single objective function model using the weighted comprehensive criterion method. The model is solved using branch and cut algorithm in MATLAB software. Computational experiments were carried out using two random instances, and the results show that the algorithm gives the bi-objective Pareto optimal solutions with significant difference in computation times when the speed is constant or varies between the routes. Using different weighting factors, this model can be considered as a decision making tool that allows decision makers to use the solution that fits the most with their organization's strategy.
绿色旅行购买者问题(GTPP)是对旅行购买者问题的概括,它包括选择供应商、分配订单和选择最佳路线,同时使采购和旅行成本以及二氧化碳排放量最小化。关于尽量减少二氧化碳排放和采购费用的两个目标职能在某些情况下是相互冲突的,因此要分开考虑。本文提出了一种精确求解双目标优化模型的方法,利用加权综合判据法将双目标数学模型转化为单目标函数模型。在MATLAB软件中采用分支割算法对模型进行求解。采用两个随机实例进行了计算实验,结果表明,该算法在速度不变或不同的情况下给出了双目标Pareto最优解,计算时间差异显著。使用不同的权重因素,该模型可以被视为一种决策制定工具,它允许决策者使用最适合其组织战略的解决方案。
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引用次数: 11
Modeling and optimization of hybrid solar-diesel-battery power system 太阳能-柴油-电池混合动力系统建模与优化
C. Ghenai, T. Salameh, A. Merabet, A. Hamid
this paper presents results on the simulation, modeling and optimization of an off grid hybrid solar PV/diesel/battery/inverter power system for residential application. The principal objective is to design a standalone renewable energy system to meet the desired electric load with high renewable fraction, low excess power and low cost of energy. Hourly simulations and optimization were performed to determine the performance and cost of the different hybrid power configurations. The results show that the solar PV/Diesel generator/battery/inverter power system offers the best performance compared to PV/Diesel generator/inverter; Diesel generator/battery/inverter and Diesel generator alone. From the total energy produced from the hybrid system, 87.6 % is used to meet all the AC load, 7.8 % is the excess electricity and 4.6 % are the system losses in both the battery and inverter. The proposed hybrid power system is sustainable, economically viable and environmentally friendly: high renewable fraction (53.25%), low excess power (7.8%), low levelized cost of energy (0.286 $/kWh), and low carbon dioxide emissions (67756 kg CO2/year).
本文介绍了一种住宅用离网太阳能光伏/柴油/电池/逆变器混合电力系统的仿真、建模和优化结果。主要目标是设计一个独立的可再生能源系统,以满足高可再生比例,低过剩功率和低成本的能源所需的电力负荷。每小时进行一次模拟和优化,以确定不同混合动力配置的性能和成本。结果表明:太阳能光伏/柴油发电机组/蓄电池/逆变电源系统性能优于光伏/柴油发电机组/逆变电源系统;柴油发电机/电池/逆变器和单独柴油发电机。从混合系统产生的总能量中,87.6%用于满足所有交流负载,7.8%是多余的电力,4.6%是电池和逆变器的系统损耗。该混合动力系统具有可持续性、经济可行性和环境友好性:高可再生比例(53.25%)、低过剩功率(7.8%)、低能源平准化成本(0.286美元/千瓦时)和低二氧化碳排放(67756千克二氧化碳/年)。
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引用次数: 28
Improvement of the ignition quality of the diesel fuel through adsorption desulfurization process using different commercial activated charcoals 不同商品活性炭吸附脱硫工艺对柴油着火质量的改善
N. Darwish, Isam A.H. Al Zubaidy, Yehya El Sayed, Zarook Shareefdeen, Ziad Sara
Desulfurization of diesel fuel was performed using two commercial activated charcoal sorbents. The two activated charcoals used in this study (PAC1 and PAC2) were powders. The desulfurization for diesel fuel was done at room temperature using 10 % by mass of the adsorbents with contact time of 1 hour. The surface chemistry and structure of the sorbent materials were studied using surface area analyzer and scanning electron microscopy (SEM) integrated with energy dispersive spectroscopy (EDS). The desulfurization process was evaluated using X-ray fluorescence analyzer. The activated charcoal samples showed to reduce the sulfur content down to 66.2% of the original sulfur content (398 ppm). The metal content of the sorbent materials, before and after desulfurization process, was determined using inductively coupled plasma (ICP) technique. Prior to analysis, the samples were prepared using microwave acid digestion. The desulfurization process resulted in a lower metal content in the fuel. The effect of the desulfurization process on the ignition quality, physical and chemical properties of the diesel fuel was studied. The amount of carbon residue, diesel index, calculated cetane index, and carbon aromaticity were evaluated. The ignition quality of the diesel fuel was improved by the adsorption desulfurization.
采用两种商用活性炭吸附剂对柴油进行了脱硫。本研究使用的两种活性炭(PAC1和PAC2)均为粉末状。采用吸附剂质量为10%,接触时间为1小时,在室温下对柴油进行了脱硫。采用表面积分析仪、扫描电子显微镜(SEM)和能谱仪(EDS)对吸附材料的表面化学和结构进行了研究。用x射线荧光分析仪对脱硫过程进行了评价。活性炭样品的硫含量降至原始硫含量(398 ppm)的66.2%。采用电感耦合等离子体(ICP)技术测定了脱硫前后吸附材料中的金属含量。分析前,采用微波酸消化法制备样品。脱硫过程降低了燃料中的金属含量。研究了脱硫工艺对柴油点火质量、理化性质的影响。对碳渣量、柴油指数、计算十六烷指数和碳芳构性进行了评价。采用吸附脱硫法改善了柴油的点火质量。
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引用次数: 1
Optimal design of laminated compressed structures with delaminations 分层压缩层合结构的优化设计
A. Muc, K. Składanowska
Delaminations are one of possible failure modes for composite compressed structures. From engineering point of view there are two important questions: (i) how it is possible to avoid delamination failure in structures and (ii) how to reduce a propagation of delamination failure mode. In our work we intend to propose a general method of solutions using stacking sequence optimization. Two general optimization problems are formulated and each of them corresponds to the above mentioned problems, and then solved with the use of genetic algorithms. The analysis deals with compressed cylindrical shell.
分层是复合材料压缩结构可能的破坏模式之一。从工程角度来看,有两个重要的问题:(i)如何可能避免结构中的分层破坏;(ii)如何减少分层破坏模式的传播。在我们的工作中,我们打算提出一种利用叠加序列优化求解的一般方法。提出了与上述问题对应的两个一般优化问题,并利用遗传算法进行求解。该分析处理的是压缩圆柱壳。
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引用次数: 1
Stochastic processes and Markov chains in shape and material optimization problems of composite structures 复合材料结构形状和材料优化问题中的随机过程和马尔可夫链
A. Muc, M. Wygoda
Commonly shape and material optimization for complex structures having complicated boundary and loading conditions requires FE analysis in order to determine accurately enough (especially for composite structures) objective functions. The solutions of such class of problems become difficult as we use probabilistic algorithms. Therefore, a general method using the Markov chain and stochastic equations is proposed to reduce the total number of iterations (computations) that are necessary to obtain a global optimum (or a quasi-global). The proposed method can be applied both for isotropic and anisotropic (composite laminates) structures. The method is illustrated by a numerical example.
通常具有复杂边界和载荷条件的复杂结构的形状和材料优化都需要进行有限元分析,以便足够准确地确定目标函数(特别是复合结构)。当我们使用概率算法时,这类问题的解变得很困难。因此,提出了一种利用马尔可夫链和随机方程的一般方法,以减少获得全局最优(或准全局)所需的总迭代(计算)次数。该方法既适用于各向同性结构,也适用于各向异性结构(复合层压板)。通过数值算例说明了该方法的有效性。
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引用次数: 0
Notched anti-podal Vivaldi antenna for biomedical applications 生物医学应用的凹口反足部维瓦尔第天线
A. Alkhaibari, A. Sheta, I. Elshafiey
Vivaldi antenna provides ultra-wideband (UWB) performance that makes it attractive for several applications. In this paper, a Vivaldi antenna is designed for use in hyperthermia treatment as well microwave imaging. The focus is related to treatment and imaging of tumors in the human brain. The structure is optimized to obtain suitable gain and bandwidth while minimizing the size. Several parameters are investigated including the return-loss and radiation patterns. The results demonstrate that this configuration has potential in some biomedical applications.
维瓦尔第天线提供超宽带(UWB)性能,使其具有多种应用吸引力。本文设计了一种用于热疗和微波成像的维瓦尔第天线。重点是与治疗和成像的肿瘤在人类大脑。该结构经过优化,以获得合适的增益和带宽,同时最小化尺寸。研究了几个参数,包括回波损耗和辐射方向图。结果表明,该结构具有一定的生物医学应用潜力。
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引用次数: 8
A Collaborative Filtering based model for recommending graduate schools 基于协同过滤的研究生院推荐模型
M. Iyengar, A. Sarkar, Shikhar Singh
Recently, with the surge of students pursuing graduate studies after completing their bachelors, there is a lack of open source resources which could point out universities and programs, based on an individual's profile. In this paper, we present our novel approach of predicting universities for graduate studies based on one's whole profile. A model is built which is able to predict the list of top-‘n’ universities based on the user profile. In our implementation, a user profile comprises one's undergraduate grades, graduate examination scores of GRE or GMAT, other exams like TOEFL, research experience and publications, work experience, and number of relevant projects. Data is collected from a variety of sources comprising peoples' profiles, who got through to graduate programs and is fed into the model, in order to serve as benchmark for an incoming query. For the model to predict the list of universities best suiting the user, Collaborative Filtering is used in order to compare the user's profile to the existing dataset. The output is a list of universities, to which an individual could apply to, based on the profile.
最近,随着完成学士学位后攻读研究生的学生激增,缺乏可以根据个人资料指出大学和项目的开源资源。在本文中,我们提出了一种基于个人整体资料来预测研究生就读大学的新方法。建立了一个模型,该模型能够根据用户资料预测排名前n的大学名单。在我们的实现中,用户简介包括一个人的本科成绩、GRE或GMAT研究生考试成绩、托福等其他考试成绩、研究经历和出版物、工作经历以及相关项目的数量。数据是从各种来源收集的,包括人们的个人资料,他们通过研究生课程,并被输入到模型中,以便作为传入查询的基准。为了让模型预测最适合用户的大学列表,使用协同过滤来比较用户的个人资料和现有数据集。输出是一个大学列表,个人可以根据个人资料申请这些大学。
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引用次数: 6
A general iterative method for solving a certain class of optimization problems 求解一类优化问题的一般迭代方法
A. Bagdasaryan, S. Kadry
In this paper, we propose a general iterative algorithm for numerical solution of high dimension optimization problems. The specificity of the problems considered is that the number of variables involved in linear constraints dominate over those involved in nonlinear constraints.
本文提出了一种求解高维优化问题的通用迭代算法。所考虑的问题的特殊性在于线性约束中涉及的变量数量占主导地位,而非线性约束中涉及的变量数量占主导地位。
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引用次数: 1
Frequency synthesizer architectural design for digital radar testbed 数字雷达试验台频率合成器结构设计
Hani Alrifai, Sirine Dhaouadi, Yamen Hatahet, F. Almabrouk, L. Albasha, H. Mir
This paper presents the design of a Phase Locked Loop (PLL) system and frequency synthesizer for an architecture that aims to miniaturize a digital radar test bed implemented using discrete microwave components. The designed PLL architecture acts as a frequency synthesizer to provide three distinct frequencies of 800 MHz, 2.0 GHz, and 2.4 GHz to the respective chips of the digital radar system. Full frequency plan and spurs analysis have been conducted. The outcome shows that it is best to implement the frequency synthesizer off the chip where the main transceiver is being developed. This ensures both full synchronization of the transmitter and receivers as well as reduced on-chip interference. Each component of the PLL system is individually designed using a suitable simulation program. The components are then combined to provide the overall PLL system delivering the desired frequencies.
本文介绍了一种锁相环(PLL)系统和频率合成器的结构设计,该结构旨在小型化使用分立微波元件实现的数字雷达试验台。所设计的锁相环架构作为频率合成器,为数字雷达系统的各自芯片提供800 MHz, 2.0 GHz和2.4 GHz三个不同的频率。进行了全频率规划和杂散分析。结果表明,最好在开发主收发器的芯片外实现频率合成器。这确保了发射器和接收器的完全同步,并减少了芯片上的干扰。锁相环系统的每个组件都使用合适的仿真程序单独设计。然后将这些组件组合在一起,以提供提供所需频率的整个锁相环系统。
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引用次数: 0
Nonlinear estimation for kinematic calibration of 3PRR planar parallel kinematics manipulator 3PRR平面并联机器人运动标定的非线性估计
A. Rosyid, B. El-Khasawneh, A. Alazzam
Calibration is a common procedure to increase the accuracy of machine tools. Estimation as an important part of the calibration has been conducted by using various algorithms. This paper presents the implementation of nonlinear least squares (Gaussian least squares differential correction) algorithm to estimate the geometrical parameters of 3PRR planar parallel kinematics manipulator having nonlinear kinematics which can be used in a hybrid serial-parallel kinematics machine tool. The independent parameters are first estimated followed by the dependent parameters. The convergence to the true values with zero estimation error is guaranteed with any initial estimates provided that no measurement noise is introduced. Subsequently, the estimation by incorporating noise from all measurement devices is conducted which gives the estimates with certain estimation errors. While the estimation errors are affected by the noise level of the measurement devices, it is shown that larger size of measurement samples increases the estimation accuracy. Finally, the uncertainty of the estimates is evaluated by using Monte Carlo simulation.
校准是提高机床精度的常用程序。估计作为标定的重要组成部分,采用了多种算法。本文采用非线性最小二乘(高斯最小二乘微分修正)算法对具有非线性运动特性的3PRR平面并联机械臂的几何参数进行估计,并将其应用于混联机床中。首先估计独立参数,然后估计相关参数。在不引入测量噪声的情况下,保证了任意初始估计都能收敛到零估计误差的真值。然后,结合所有测量设备的噪声进行估计,得到具有一定估计误差的估计。虽然估计误差受测量设备噪声水平的影响,但测量样本的尺寸越大,估计精度越高。最后,利用蒙特卡罗模拟对估计的不确定性进行了评估。
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引用次数: 0
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2017 7th International Conference on Modeling, Simulation, and Applied Optimization (ICMSAO)
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