检索结果-内蒙古大学图书馆

21st IFAC World Congress on Automatic Control - Meeting Societal Challenges

作者： Chamanbaz, Mohammadreza Bouffanais, Roland Singapore Univ Technol & Design Singapore 487372 Singapore

In this paper, we propose a computationally efficient algorithm for solving mixed-integer sampled optimization problems involving a large number of constraints. The proposed algorithm has a sequential nature. Specifically, at each iteration of the algorithm, the feasibility of a candidate solution is verified for all the constraints involved in the sampled optimization problem and violating constraints are identified. As a second step, an optimization problem is formed whose constraint set involves the current basis the minimal set of constraints defining the current candidate solution and a limited number of the observed violating constraints. We prove that the algorithm converges to the optimal solution in finite time. Additionally, we establish the effectiveness of the proposed algorithm using mixed-integer linear, and quadratically constrained quadratic programming problems. Copyright (C) 2020 The Authors.

关键词： Sampled optimization problems sequential algorithm Large-scale optimization

来源：评论

学校读者我要写书评

暂无评论

sequential algorithm for the Detection of the Shockable Rhythms in Electrocardiogram

Sequential Algorithm for the Detection of the Shockable Rhyt...

引用

Annual International Conference of the IEEE Engineering in Medicine and Biology Society

作者： Ji-Wook Jeong I.B. Lee Yoonseon Song Yongwon Jang Hyung Wook Noh Sooyeul Lee the Electronics & Telecommunications Research Institute Daejeon 305-701 South Korea the Electronics & Telecommunications Research Institute Daejeon 305-701 South Korea.

ISBN: (纸本)9781424441198

We suggest a sequential algorithm for the detection of the ventricular fibrillation (VF) and ventricular tachycardia (VT) of a rate above 180 bpm, so called shockable rhythms. The built-in algorithm for ECG analysis embedded in the portable bio-signal sensing module is aimed to discriminate between shockable and non-shockable rhythms and its accuracy is analyzed. An algorithm for VF/VT detection is proposed to analyze every 1 s ECG episode using the past 8 s episodes. The method is tested with 844,587 ECG episodes from the widely accepted databases. A sensitivity of 86.8 % and a specificity of 99.4 % were obtained and compared with the previous results.

关键词： sequential algorithm in Electrocardiogram ECG

来源：评论

学校读者我要写书评

暂无评论

A sequential algorithm for Reliability-Based Robust Design Optimization Under Epistemic Uncertainty

引用

JOURNAL OF MECHANICAL DESIGN 2012年第1期134卷 14502-14502页

作者： Tang, Yuanfu Chen, Jianqiao Wei, Junhong Huazhong Univ Sci & Technol Dept Mech Hubei Key Lab Engn Struct Anal & Safety Assessmen Wuhan 430074 Hubei Peoples R China

In practical applications, there may exist a disparity between real values and optimal results due to uncertainties. This kind of disparity may cause violations of some probabilistic constraints in a reliability based design optimization (RBDO) problem. It is important to ensure that the probabilistic constraints at the optimum in a RBDO problem are insensitive to the variations of design variables. In this paper, we propose a novel concept and procedure for reliability based robust design in the context of random uncertainty and epistemic uncertainty. The epistemic uncertainty of design variables is first described by an info gap model, and then the reliability-based robust design optimization (RBRDO) is formulated. To reduce the computational burden in solving RBRDO problems, a sequential algorithm using shifting factors is developed. The algorithm consists of a sequence of cycles and each cycle contains a deterministic optimization followed by an inverse robustness and reliability evaluation. The optimal result based on the proposed model satisfies certain reliability requirement and has the feasible robustness to the epistemic uncertainty of design variables. Two examples are presented to demonstrate the feasibility and efficiency of the proposed method. [DOI: 10.1115/1.4005442]

关键词： epistemic uncertainty info-gap models feasible robustness index sequential algorithm shifting factor reliability-based robust design optimization

来源：评论

学校读者我要写书评

暂无评论

A sequential algorithm for Sampled Mixed-integer Optimization Problems ⁎

引用

IFAC-PapersOnLine 2020年第2期53卷 6749-6755页

作者： Mohammadreza Chamanbaz Roland Bouffanais Singapore University of Technology and Design Singapore 487372

In this paper, we propose a computationally efficient algorithm for solving mixed-integer sampled optimization problems involving a large number of constraints. The proposed algorithm has a sequential nature. Specifically, at each iteration of the algorithm, the feasibility of a candidate solution is verified for all the constraints involved in the sampled optimization problem and violating constraints are identified. As a second step, an optimization problem is formed whose constraint set involves the current basis—the minimal set of constraints defining the current candidate solution—and a limited number of the observed violating constraints. We prove that the algorithm converges to the optimal solution in finite time. Additionally, we establish the effectiveness of the proposed algorithm using mixed-integer linear, and quadratically constrained quadratic programming problems.

关键词： Sampled optimization problems sequential algorithm Large-scale optimization

来源：评论

学校读者我要写书评

暂无评论

The sequential algorithm for Dynamic Optimization of Bioprocesses

引用

IFAC Proceedings Volumes 1992年第2期25卷 271-274页

作者： D. Leštan A. Podgornik A. Perdih R. Stravs Department of Chemistry and Chemical Technology University of Ljubljana Murnikova 6 61101 Ljubljana Slovenia BIA Ltd. Adamičeva 4 61117 Ljubljana Slovenia

A simple sequential algorithm was developed for constrained dynamic optimization of certain model types of fed-batch bioprocesses. The biotechnological and numerical basis as well as the application of the algorithm i... 详细信息

关键词： Fed-batch dynamic optimization sequential algorithm

来源：评论

学校读者我要写书评

暂无评论

SIMPLEST sequential SEARCH algorithm FOR LARGEST VALUE OF A TWICE-DIFFERENTIABLE FUNCTION

引用

MATHEMATICAL NOTES 1976年第5-6期19卷 508-509页

作者： GANSHIN, GS KRASNOYARSK STATE UNIV KRASNOYARSKUSSR

In this note we describe a sequential algorithm for the computation with specified accuracy on a segment of the largest value of a twice-differentiable function. The algorithm described does not require the computatio... 详细信息

关键词： Search algorithm sequential algorithm sequential Search sequential Search algorithm

来源：评论

学校读者我要写书评

暂无评论

sequential quasi-convex-based algorithm for waveform design in colocated multiple-input multiple-output radars

引用

IET SIGNAL PROCESSING 2016年第3期10卷 309-317页

作者： Imani, Sadjad Ghorashi, Seyed Ali Shahid Beheshti Univ Dept Elect Engn GC Tehran Iran Shahid Beheshti Univ Cyberspace Res Inst GC Tehran Iran

This study considers the problem of waveform design for colocated multiple-input multiple-output (MIMO) radars for multiple targets in the presence of multiple interferences in white Gaussian noise. Here, the authors jointly design the transmit waveform and receive beamforming by a sequential algorithm. The proposed sequential algorithm maximises the minimum signal-to-interference-plus-noise ratio (SINR) to design both continuous and finite alphabet phase waveforms. In the case of continuous phase, all phases can be chosen in the waveform space, while in finite alphabet case, phases are only chosen from a confine set. Two important practical constraints of constant envelope' and similarity' are considered as well. The authors also have converted the waveform design problem into a quasi-convex optimisation problem which can be effectively solved by using convex optimisation toolbox (CVX). They have evaluated the performance of the matched filter output, beampattern and peak-to-average power ratio via numerical simulations and shown that the proposed sequential method achieves better SINR performance compared with existing MIMO radar transmit waveform design methods, for both single and multiple target scenarios.

关键词： MIMO radar target tracking radar tracking convex programming Gaussian noise radiofrequency interference sequential quasiconvex based algorithm waveform design colocated multiple input multiple output radars MIMO radar multiple target tracking multiple interference white Gaussian noise sequential algorithm signal-to-interference-plus-noise ratio constant envelope constraint similarity constraint convex optimisation toolbox

来源：评论

学校读者我要写书评

暂无评论

A sequential deep learning algorithm for sampled mixed-integer optimisation problems

引用

INFORMATION SCIENCES 2023年 634卷 73-84页

作者： Chamanbaz, Mohammadreza Bouffanais, Roland Univ Sydney Rio Tinto Ctr Mine Automat Australian Ctr Field Robot Sydney Australia Univ Ottawa Fac Engn Dept Mech Engn Ottawa ON Canada

Mixed-integer optimisation problems can be computationally challenging. Here, we introduce and analyse two efficient algorithms with a specific sequential design that are aimed at dealing with sampled problems within this class. At each iteration step of both algorithms, we first test the feasibility of a given test solution for each and every constraint associated with the sampled optimisation at hand, while also identifying those constraints that are violated. Subsequently, an optimisation problem is constructed with a constraint set consisting of the current basis- namely, the smallest set of constraints that fully specifies the current test solution-as well as constraints related to a limited number of the identified violating samples. We show that both algorithms exhibit finite-time convergence towards the optimal solution. algorithm 2 features a neural network classifier that notably improves the computational performance compared to algorithm 1. We quantitatively establish these algorithms' efficacy through three numerical tests: robust optimal power flow, robust unit commitment, and robust random mixed-integer linear program.

关键词： Sampled optimisation problem sequential algorithm Large-scale optimisation Deep learning Neural network classifier

来源：评论

学校读者我要写书评

暂无评论

Solving an inverse heat conduction problem using genetic algorithm: sequential and multi-core parallelization approach

引用

APPLIED MATHEMATICAL MODELLING 2014年第7-8期38卷 1948-1958页

作者： Pourgholi, Reza Dana, Hassan Tabasi, Seyed Hashem Damghan Univ Sch Math & Comp Sci Damghan Iran

In this paper a numerical approach combining the least squares method and the genetic algorithm (sequential and multi-core parallelization approach) is proposed for the determination of temperature in an inverse heat conduction problem (IHCP). Some numerical experiments confirm the utility of this algorithm as the results are in good agreement with the exact data. Results show that an excellent estimation can be obtained by implementation sequential genetic algorithm within a CPU with clock speed 2.7 GHz, and parallel genetic algorithm within a 16-core CPU with clock speed 2.7 GHz for each core. (C) 2013 Elsevier Inc. All rights reserved.

关键词： IHCP Genetic algorithm sequential algorithm Multi-core parallelization algorithm The least squares method

来源：评论

学校读者我要写书评

暂无评论

A sequential Automatic Impedance-Matching algorithm to Achieve Simultaneous Complex-Conjugate Condition in Multi-element Antennas

A Sequential Automatic Impedance-Matching Algorithm to Achie...

引用

IEEE International Workshop on Electromagnetics (IEEE iWEM) - Applications and Student Innovation Competition

作者： Kaga, Kazuki Li, Kun Honda, Kazuhiro Ogawa, Koichi Toyama Univ Grad Sch Engn 3190 Gofuku Toyama Toyama 9308555 Japan

ISBN: (纸本)9781479948154

This paper presents an automatic impedancematching algorithm that can sequentially realize a simultaneous conjugate-matching state for all the elements in an N-element array antenna. The analytical results show that the converged solution obtained from the proposed algorithm agrees well with the solution calculated by the analytical deterministic equation, confirming the validity of the proposed method. The method can be applied to MRC and MIMO array antennas.

关键词： Impedance Matching sequential algorithm Simultaneous Complex Conjugate MIMO Array antenna

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：