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主题爬虫;本体;优先度评估;模拟退火;暴雨灾害 1

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全局最优解 1

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Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

《能源前沿(英文)》 2015年 第9卷 第2期   页码 148-161 doi: 10.1007/s11708-015-0344-z

摘要: Conventional power grids across the globe are reforming to smart power grids with cutting edge technologies in real time monitoring and control methods. Advanced real time monitoring is facilitated by incorporating synchrophasor measurement units such as phasor measurement units (PMUs) to the power grid monitoring system. Several physical and economic constraints limit the deployment of PMUs in smart power grids. This paper proposes a pragmatic multi-stage simulated annealing (PMSSA) methodology for finding the optimal locations in the smart power grid for installing PMUs in conjunction with existing conventional measurement units (CMUs) to achieve a complete observability of the grid. The proposed PMSSA is much faster than the conventional simulated annealing (SA) approach as it utilizes controlled uphill and downhill movements during various stages of optimization. Moreover, the method of integrating practical phasor measurement unit (PMU) placement conditions like PMU channel limits and redundant placement can be easily handled. The efficacy of the proposed methodology has been validated through simulation studies in IEEE standard bus systems and practical regional Indian power grids.

关键词: phasor measurement units (PMUs)     pragmatic PMU placement     simulated annealing (SA)     western region Indian power grid (WRIPG)    

Reliability analysis on civil engineering project based on integrated adaptive simulation annealing and

Xiao-ping BAI,Ya-nan LIU

《结构与土木工程前沿(英文)》 2016年 第10卷 第4期   页码 462-471 doi: 10.1007/s11709-016-0361-y

摘要: Dynamic reliability is a very important issue in reliability research. The dynamic reliability analysis for the project is still in search of domestic and international research in the exploration stage. By now, dynamic reliability research mainly concentrates on the reliability assessment; the methods mainly include dynamic fault tree, extension of event sequence diagram and Monte Carlo simulation, and et al. The paper aims to research the dynamic reliability optimization. On the basis of analysis of the four quality influence factors in the construction engineering, a method based on gray correlation degree is employed to calculate the weights of factors affecting construction process quality. Then the weights are added into the reliability improvement feasible index (RIFI). Furthermore, a novel nonlinear programming mathematic optimization model is established. In the Insight software environment, the Adaptive Simulated Annealing (ASA) algorithm is used to get a more accurate construction subsystem optimal reliability under different RIFI conditions. In addition, the relationship between construction quality and construction system reliability is analyzed, the proposed methods and detailed processing can offer a useful reference for improving the construction system quality level.

关键词: civil engineering     dynamic reliability     grey relational degree     adaptive simulated annealing algorithm    

Prediction of cutting force in turning of UD-GFRP using mathematical model and simulated annealing

Meenu GUPTA, Surinder Kumar GILL

《机械工程前沿(英文)》 2012年 第7卷 第4期   页码 417-426 doi: 10.1007/s11465-012-0343-2

摘要:

Glass fiber reinforced plastics (GFRPs) composite is considered to be an alternative to heavy exortic materials. According to the need for accurate machining of composites has increased enormously. During machining, the obtaining cutting force is an important aspect. The present investigation deals with the study and development of a cutting force prediction model for the machining of unidirectional glass fiber reinforced plastics (UD-GFRP) composite using regression modeling and optimization by simulated annealing. The process parameters considered include cutting speed, feed rate and depth of cut. The predicted values radial cutting force model is compared with the experimental values. The results of prediction are quite close with the experimental values. The influences of different parameters in machining of UD-GFRP composite have been analyzed.

关键词: UD-GFRP     ANOVA     radial cutting force     PCD tool     Taguchi method     regression analysis     simulated annealing     multi objective techniques    

基于本体和模拟退火算法的暴雨灾害主题爬虫策略 Research Article

刘景发1,2,李帆3,丁若尧1,2,刘子昂4

《信息与电子工程前沿(英文)》 2022年 第23卷 第8期   页码 1189-1204 doi: 10.1631/FITEE.2100360

摘要: 目前,主题爬虫是从海量异构网络中获取有效领域知识的重要方法。目前大多数主题爬虫技术难以获得高质量爬行结果。主要难点包括主题基准模型的建立、超链接主题相关性的评估和爬行策略的设计。本文采用领域本体为特定主题构建主题基准模型,并提出一种新的基于局部本体和全局本体的多重筛选策略(MFSLG)。为提高待访问超链接主题相关性计算精度,提出一种基于网页文本和链接结构的综合优先度评估方法(CPEM),同时,采用模拟退火(SA)算法避免主题爬虫陷入局部最优搜索。本文首次设计融合SA算法、MFSLG策略和CPEM策略实现主题爬虫,提出两种新的基于本体和SA主题爬虫策略(FCOSA),包括基于全局本体的FCOSA策略(FCOSA_G)和基于局部本体和全局本体的FCOSA策略(FCOSA_LG),以从网络中获取与暴雨灾害主题相关的网页。实验结果表明,针对不同性能指标,所提爬虫策略优于其他主题爬虫策略。

关键词: 主题爬虫;本体;优先度评估;模拟退火;暴雨灾害    

基于修正模拟退火算法及溢出面积模型的固定边界布图规划 Article

De-xuan ZOU,Gai-ge WANG,Gai PAN,Hong-wei QI

《信息与电子工程前沿(英文)》 2016年 第17卷 第11期   页码 1228-1244 doi: 10.1631/FITEE.1500386

摘要: 第一,提出了一种修正模拟退火算法(Modified simulated annealing algorithm, MSA)。

关键词: 固定边界布图规划;修正的模拟退火算法;全局搜索;溢出面积模型;B*-tree表示法    

基于退火算法的物流配送网的求优研究

段敬民,常跃军,李赞祥,崔建明

《中国工程科学》 2012年 第14卷 第7期   页码 109-112

摘要:

模拟退火算法是一种启发式算法,是受到加热紧缩的退火过程所启发而提出来的求解组合优化问题的一种逼近算法。算法要优于传统的贪婪算法,避免了陷入局部最优的可能,从而达到全局最优解。在物流配送网络中经常有一些寻求最短路径等问题出现,为了能够达到最短、最优、最经济等,需要进行物流配送路径寻优。文中采用模拟退火算法进行一个示例的验证,效果证明可行。

关键词: 模拟退火算法     全局最优解     物流配送网    

退火-遗传算法寻优及其实现

王英

《中国工程科学》 2008年 第10卷 第7期   页码 57-59

摘要:

分析了遗传算法及退火算法的优缺点,提出用退火算法改进遗传算法局部的最优值搜索效率低问题。退火算法与遗传算法融合后,使算法在寻优结果上更加迅速精确。通过水泥的配比工程实例,与单纯的遗传算法的结果进行对比,说明该方法是有效的。

关键词: 遗传算法     退火算法     遗传算法改进    

移动众包环境下基于友谊度的任务规划 Article

Yuan LIANG,Wei-feng LV,Wen-jun WU,Ke XU

《信息与电子工程前沿(英文)》 2017年 第18卷 第1期   页码 107-121 doi: 10.1631/FITEE.1601860

摘要: 最近,众包平台已吸引了大量的注册用户在线下执行特定的任务。然而,大部分现有方法仅考虑了工人和任务信息都已提前获知的情况(静态离线情景),而较少考虑到工人动态抵达的情况(动态在线情景)。因此,当工人动态抵达时,如何给工人安排适合的任务以获得其最大的满意度成为了一个具有挑战性的问题。为解决这一问题,本文提出了一种有用并且普遍的人工-任务模型,该模型不仅考虑在静态离线时给工人安排任务的情况,还同时考虑了在工人动态抵达时如何给工人安排合适的任务。在本文中,为解决静态离线情景下的任务分配问题,我们首先提出一个有效的贪心算法。由于贪心算法极易陷入局部最优,我们又加入了模拟退火法来提高贪心算法的性能。另外,为解决动态在线情景下的分配问题,我们提出了一种贪心算法。最后,在真实数据集和具有不同分布人造数据集上进行了大量实验,实验结果验证了算法的效果与性能。

关键词: 移动众包;任务规划;贪心算法;模拟退火    

COPPER:具有存内计算架构的组合优化问题求解器 Research Article

汪乾坤1,李星辰2,3,吴秉哲4,杨可3,胡炜5,孙广宇3,6,7,杨玉超3

《信息与电子工程前沿(英文)》 2023年 第24卷 第5期   页码 731-741 doi: 10.1631/FITEE.2200463

摘要: 一些先前的工作基于 Hopfield神经网络提出了混沌模拟退火(chaotic simulated annealing,CSA),并取得了良好的表现。

关键词: 组合优化问题;混沌模拟退火;存内计算    

Cu/Cr co-stabilization mechanisms in a simulated AlO-FeO-CrO-CuO waste system

《环境科学与工程前沿(英文)》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1408-4

摘要:

• Cu and Cr can be mostly incorporated into CuFexAlyCr2xyO4 with a spinel structure.

关键词: Spinel structure     Copper     Chromium     Co-stabilization     Thermal treatment    

Analysis on annealing-induced stress of blind-via TSV using FEM

Jie SHAO, Tielin SHI, Li DU, Lei SU, Xiangning LU, Guanglan LIAO

《机械工程前沿(英文)》 2018年 第13卷 第3期   页码 401-410 doi: 10.1007/s11465-017-0457-7

摘要:

Copper-filled through silicon via (TSV) is a promising material owing to its application in high-density three-dimensional (3D) packaging. However, in TSV manufacturing, thermo-mechanical stress is induced during the annealing process, often causing reliability issues. In this paper, the finite element method is employed to investigate the impacts of via shape and SiO2 liner uniformity on the thermo-mechanical properties of copper-filled blind-via TSV after annealing. Top interface stress analysis on the TSV structure shows that the curvature of via openings releases stress concentration that leads to ~60 MPa decrease of normal stresses, sxx and syy, in copper and ~70 MPa decrease sxx of in silicon. Meanwhile, the vertical interface analysis shows that annealing-induced stress at the SiO2/Si interface depends heavily on SiO2 uniformity. By increasing the thickness of SiO2 linear, the stress at the vertical interface can be significantly reduced. Thus, process optimization to reduce the annealing-induced stress becomes feasible. The results of this study help us gain a better understanding of the thermo-mechanical behavior of the annealed TSV in 3D packaging.

关键词: through silicon via (TSV)     annealing-induced stress     interface stress     plastic deformation     finite element method    

Appraising the potential of calcium sulfoaluminate cement-based grouts in simulated permafrost environments

《结构与土木工程前沿(英文)》 2023年 第17卷 第5期   页码 722-731 doi: 10.1007/s11709-023-0950-5

摘要: The aim of this study is to appraise the potential of calcium sulfoaluminate (CSA) cement-based grouts in simulated permafrost environments. The hydration and performance of CSA cement-based grouts cured in cold environments (10, 0, and −10 °C) are investigated using a combination of tests, including temperature recording, X-ray diffraction (XRD) tests, thermogravimetric analysis (TGA), and unconfined compressive strength (UCS) tests. The recorded temperature shows a rapid increase in temperature at the early stage in all the samples. Meanwhile, results of the TGA and XRD tests show the generation of a significant quantity of hydration products, which indicates the rapid hydration of CSA cement-based grouts at the early stage at low temperatures. Consequently, the CSA cement-based grouts exhibit remarkably high early strength. The UCS values of the samples cured for 2 h at −10, 0, and 10 °C are 6.5, 12.0, and 12.3 MPa, respectively. The UCS of the grouts cured at −10, 0, and 10 °C increases continuously with age and ultimately reached 14.9, 19.0, and 30.6 MPa at 28 d, respectively. The findings show that the strength of grouts fabricated using CSA cement can develop rapidly in cold environments, thus rendering them promising for permafrost applications.

关键词: permafrost     low temperatures     calcium sulfoaluminate cement-based grouts     hydration reaction     compressive strength    

Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

《化学科学与工程前沿(英文)》 2021年 第15卷 第5期   页码 1346-1355 doi: 10.1007/s11705-021-2040-3

摘要: The size fractionation of magnetic nanoparticles is a technical problem, which until today can only be solved with great effort. Nevertheless, there is an important demand for nanoparticles with sharp size distributions, for example for medical technology or sensor technology. Using magnetic chromatography, we show a promising method for fractionation of magnetic nanoparticles with respect to their size and/or magnetic properties. This was achieved by passing magnetic nanoparticles through a packed bed of fine steel spheres with which they interact magnetically because single domain ferro-/ferrimagnetic nanoparticles show a spontaneous magnetization. Since the strength of this interaction is related to particle size, the principle is suitable for size fractionation. This concept was transferred into a continuous process in this work using a so-called simulated moving bed chromatography. Applying a suspension of magnetic nanoparticles within a size range from 20 to 120 nm, the process showed a separation sharpness of up to 0.52 with recovery rates of 100%. The continuous feed stream of magnetic nanoparticles could be fractionated with a space-time-yield of up to 5 mg/(L∙min). Due to the easy scalability of continuous chromatography, the process is a promising approach for the efficient fractionation of industrially relevant amounts of magnetic nanoparticles.

关键词: magnetic chromatography     simulated moving bed chromatography     magnetic nanoparticles     size fractionation    

Thermal annealing synthesis of double-shell truncated octahedral Pt-Ni alloys for oxygen reduction reaction

Xiashuang LUO, Yangge GUO, Hongru ZHOU, Huan REN, Shuiyun SHEN, Guanghua WEI, Junliang ZHANG

《能源前沿(英文)》 2020年 第14卷 第4期   页码 767-777 doi: 10.1007/s11708-020-0667-2

摘要: Shape-controlled Pt-Ni alloys usually offer an exceptional electrocatalytic activity toward the oxygen reduction reaction (ORR) of polymer electrolyte membrane fuel cells (PEMFCs), whose tricks lie in well-designed structures and surface morphologies. In this paper, a novel synthesis of truncated octahedral PtNi alloy catalysts that consist of homogeneous Pt-Ni alloy cores enclosed by NiO-Pt double shells through thermally annealing defective heterogeneous PtNi alloys is reported. By tracking the evolution of both compositions and morphologies, the outward segregation of both PtO and NiO are first observed in Pt-Ni alloys. It is speculated that the diffusion of low-coordination atoms results in the formation of an energetically favorable truncated octahedron while the outward segregation of oxides leads to the formation of NiO-Pt double shells. It is very attractive that after gently removing the NiO outer shell, the dealloyed truncated octahedral core-shell structure demonstrates a greatly enhanced ORR activity. The as-obtained truncated octahedral Pt Ni core-shell alloy presents a 3.4-folds mass-specific activity of that for unannealed sample, and its activity preserves 45.4% after 30000 potential cycles of accelerated degradation test (ADT). The peak power density of the dealloyed truncated octahedral Pt Ni core-shell alloy catalyst based membrane electrolyte assembly (MEA) reaches 679.8 mW/cm , increased by 138.4 mW/cm relative to that based on commercial Pt/C.

关键词: dealloyed Pt-Ni alloys     truncated octahedron     double-shell     thermal annealing     oxygen reduction reaction (ORR)    

Removal of nitric oxide from simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate

《化学科学与工程前沿(英文)》 2023年 第17卷 第4期   页码 460-469 doi: 10.1007/s11705-022-2224-5

摘要: Nitric oxide being a major gas pollutant has attracted much attention and various technologies have been developed to reduce NO emission to preserve the environment. Advanced persulfate oxidation technology is a workable and effective choice for wet flue gas denitrification due to its high efficiency and green advantages. However, NO absorption rate is limited and affected by mass transfer limitation of NO and aqueous persulfate in traditional reactors. In this study, a rotating packed bed (RPB) was employed as a gas–liquid absorption device to elevate the NO removal efficiency (ηNO) by aqueous persulfate ((NH4)2S2O8) activated by ferrous ethylenediaminetetraacetate (Fe2+-EDTA). The experimental results regarding the NO absorption were obtained by investigating the effect of various operating parameters on the removal efficiency of NO in RPB. Increasing the concentration of (NH4)2S2O8 and liquid–gas ratio could promoted the oxidation and absorption of NO while the ηNO decreased with the increase of the gas flow and NO concentration. In addition, improving the high gravity factor increased the ηNO and the total volumetric mass transfer coefficient (KGα) which raise the ηNO up to more than 75% under the investigated system. These observations proved that the RPB can enhance the gas–liquid mass transfer process in NO absorption. The correlation formula between KGα and the influencing factors was determined by regression calculation, which is used to guide the industrial scale-up application of the system in NO removal. The presence of O2 also had a negative effect on the NO removal process and through electron spin resonance spectrometer detection and product analysis, it was revealed that Fe2+-EDTA activated (NH4)2S2O8 to produce •SO4, •OH and •O2, played a leading role in the oxidation of NO, to produce NO3 as the final product. The obtained results demonstrated a good applicable potential of RPB/PS/Fe2+-EDTA in the removal of NO from flue gases.

关键词: rotating packed bed     Fe2+-EDTA     sulfate radical     hydroxyl radical     NO removal efficiency    

标题 作者 时间 类型 操作

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

期刊论文

Reliability analysis on civil engineering project based on integrated adaptive simulation annealing and

Xiao-ping BAI,Ya-nan LIU

期刊论文

Prediction of cutting force in turning of UD-GFRP using mathematical model and simulated annealing

Meenu GUPTA, Surinder Kumar GILL

期刊论文

基于本体和模拟退火算法的暴雨灾害主题爬虫策略

刘景发1,2,李帆3,丁若尧1,2,刘子昂4

期刊论文

基于修正模拟退火算法及溢出面积模型的固定边界布图规划

De-xuan ZOU,Gai-ge WANG,Gai PAN,Hong-wei QI

期刊论文

基于退火算法的物流配送网的求优研究

段敬民,常跃军,李赞祥,崔建明

期刊论文

退火-遗传算法寻优及其实现

王英

期刊论文

移动众包环境下基于友谊度的任务规划

Yuan LIANG,Wei-feng LV,Wen-jun WU,Ke XU

期刊论文

COPPER:具有存内计算架构的组合优化问题求解器

汪乾坤1,李星辰2,3,吴秉哲4,杨可3,胡炜5,孙广宇3,6,7,杨玉超3

期刊论文

Cu/Cr co-stabilization mechanisms in a simulated AlO-FeO-CrO-CuO waste system

期刊论文

Analysis on annealing-induced stress of blind-via TSV using FEM

Jie SHAO, Tielin SHI, Li DU, Lei SU, Xiangning LU, Guanglan LIAO

期刊论文

Appraising the potential of calcium sulfoaluminate cement-based grouts in simulated permafrost environments

期刊论文

Continuous size fractionation of magnetic nanoparticles by using simulated moving bed chromatography

Carsten-Rene Arlt, Dominik Brekel, Stefan Neumann, David Rafaja, Matthias Franzreb

期刊论文

Thermal annealing synthesis of double-shell truncated octahedral Pt-Ni alloys for oxygen reduction reaction

Xiashuang LUO, Yangge GUO, Hongru ZHOU, Huan REN, Shuiyun SHEN, Guanghua WEI, Junliang ZHANG

期刊论文

Removal of nitric oxide from simulated flue gas using aqueous persulfate with activation of ferrous ethylenediaminetetraacetate

期刊论文