检索结果-内蒙古大学图书馆

21st International Conference on Information Fusion (FUSION)

作者： Date, Ketan Nagi, Rakesh Univ Illinois Dept Ind & Enterprise Syst Engn Urbana IL 61801 USA

ISBN: (纸本)9780996452762

In this paper, we propose an integer programming based model for tracking multiple maneuverable targets in a planar region. The objective function of this model uses both pairs and triplets of observations, which offer more accurate representation for constant velocity targets. Triplet scores in this model are calculated using a novel approach based on cubic spline interpolation, while the data association problem is solved using a specialized multi-dimensional assignment formulation. We show that the spline interpolation based scoring model provides more accurate reconstruction of trajectories, when compared to a naive model based on linear interpolation, on various randomly generated trajectories, at the expense of modest increase in computation time. The proposed multi-dimensional assignment formulation has nice structural properties and tight linear programming relaxation bound, which results in small computation times.

关键词： Multi-target tracking maneuvering targets mixed-integer linear programming data association spline interpolation

来源：评论

学校读者我要写书评

暂无评论

Ground stations networks for Free-Space Optical communications: maximizing the data transfer

引用

Electronic Notes in Discrete Mathematics 2018年 64卷 255-264页

作者： Capelle, Mikaël Huguet, Marie-José Jozefowiez, Nicolas Olive, Xavier Thales Alenia Space France Toulouse France LAAS-CNRS Université de Toulouse CNRS INSA Toulouse France

Free-space optical communications are becoming a mature technology, but unlike current radio-frequency technologies, they are strongly impacted by clouds. In this paper, we aim to find a network of optical ground stations maximizing the amount of data that can be sent from a low-earth orbiting satellite to the Earth during its missions, taking into consideration cloud information. We present a mixed integer linear Program (MILP) and a hierarchical method based on an exhaustive enumeration of the sets of ground stations and on a dynamic programming algorithm and compare them on real scenarios based on archived years of cloud data. Even if the MILP can solve scenarios over small time horizons in less than one hour, experiments show that the hierarchical approach outperforms it in term of CPU time while achieving optimality. © 2018 Elsevier B.V.

关键词： Dynamic programming Free-Space Optical Communications mixed-integer linear programming Optical Ground Station Network Optimisation

来源：评论

学校读者我要写书评

暂无评论

Bus-Angle Difference Structural Cuts for Transmission System Expansion Planning with L-1 Reliability

Bus-Angle Difference Structural Cuts for Transmission System...

引用

IEEE Electrical Power and Energy Conference (EPEC)

作者： Escobar, Laura M. Escobedo, Adolfo R. Escobar, David Romero, Ruben Sao Paulo State Univ UNESP Dept Elect Engn Ilha Solteira SP Brazil Arizona State Univ Tempe AZ USA Univ Montreal Montreal PQ Canada

ISBN: (纸本)9781538654194

This paper presents a methodology to solve the long-term transmission network expansion planning problem considering L-1 reliability. The methodology supplements an underlying mixed-integer linear programming formulation with cutting planes derived from structural insights of bus-angle differences involving buses connected by paths of existing and/or expansion lines. The addition of these cutting planes expedites the solution process by yielding tighter relaxation bounds within a branch-and-cut framework, thereby reducing computational times and memory requirements. In order to solve the resulting problems, this work uses the AMPL modeling language interfaced with the CPLEX mathematical programming solver. The practicality of the methodology is tested via the Southern Brazilian System, yielding very promising results.

关键词： mathematical modeling mixed-integer linear programming branch-and-cut transmission expansion planning

来源：评论

学校读者我要写书评

暂无评论

HEURISTIC AND EXACT METHODS FOR THE LARGE-SCALE DISCRETE TIME-COST TRADE-OFF PROBLEMS

HEURISTIC AND EXACT METHODS FOR THE LARGE-SCALE DISCRETE TIM...

引用

作者： SAMAN AMINBAKHSH MIDDLE EAST TECHNICAL UNIVERSITY

学位级别：博士

Construction industry necessitates formulating impeccable plans by decision makers for securing optimal outcomes. Managers often face the challenge of compromising between diverse and usually conflicting objectives. Particularly, accurate decisions on the time and cost must be made in every construction project since project success is chiefly related to these objectives. This is realized by addressing the time-cost trade-off problem (TCTP) which is an optimization problem and its objective is to identify the set of time-cost alternatives that provide the optimal schedule(s). Due to discreteness of many resources in realistic projects, discrete version of this problem (DTCTP) is of great practical relevance. The Pareto front extension of DTCTP is a multi-objective optimization problem that facilities preference articulation of decision makers by providing them with a set of mutually non-dominated solutions of same quality. Due to the complex nature of DTCTP, the literature on large-scale problems is virtually void; besides, most of the existing methods do not suit actual practices and popular commercial planning software lack tools for solution of DTCTP. The main focus of this thesis relates to providing means for optimization of real- life-scale Pareto oriented DTCTPs and it aims to contribute to both researchers and practitioners by tightening the gap between the literature and the real-world requirements of the projects. The results of the comparative studies reveal that the proposed methods are successful for solving large-scale DTCTPs and provide the management with a quantitative basis for decisions on selection of the proper alternatives for the real-life-scale construction projects.

关键词： Discrete Time-Cost Trade-Off Problem Heuristic mixed-integer linear programming Pareto Front Particle Swarm Optimization

来源：评论

学校读者我要写书评

暂无评论

Modeling Demand Propagation in Guaranteed Service Models

Modeling Demand Propagation in Guaranteed Service Models

引用

9th Vienna International Conference on Mathematical Modelling (MATHMOD)

作者： Loehnert, Madeleine Rambau, Joerg DATEV eG Nurnberg Germany Univ Bayreuth D-9540 Bayreuth Germany

In this paper, the class of guaranteed service models for multi-echelon inventory management is enhanced with explicit demand propagation. More specifically, the known mixed integer linear programming formulation for the guaranteed service model is refined by new variables and restrictions so that it describes the internal demand propagation exactly for linear demand bound functions. With this feature, aspects like outsourcing as well as decision dependent stochastic demands at internal stock points can be expressed exactly. The relevance of the new model is shown in an illustrative example, where the new model is able to find a solution with almost 40% lower actual cost compared to the existing approximative model without explicit demand propagation.

关键词： multi-echelon inventory management mixed-integer linear programming demand propagation outsourcing lost demand

来源：评论

学校读者我要写书评

暂无评论

Filter Optimization for Real Time Digital Processing of Radiofrequency Signals: Application to Oscillator Metrology 72

Filter Optimization for Real Time Digital Processing of Radi...

引用

IEEE International Frequency Control Symposium (IFCS)

作者： Hugeat, A. Bernard, J. Goavec-Merou, G. Bourgeois, P. -Y. Friedt, J. -M. FEMTO ST Time & Frequency Dept Besancon France FEMTO ST Comp Sci Dept DISC Besancon France

ISBN: (纸本)9781538632147

Software Defined Radio (SDR) provides stability, flexibility and reconfigurability to radiofrequency signal processing. Applied to oscillator characterization in the context of ultrastable clocks, stringent filtering requirements are defined by spurious signal or noise rejection needs. Since real time radiofrequency processing must be performed in a Field Programmable Array to meet timing constraints, we investigate optimization strategies to design filters meeting rejection characteristics while limiting the hardware resources required and keeping timing constraints within the targeted measurement bandwidths.

关键词： Software Defined Radio mixed-integer linear programming Finite Impulse Response filter

来源：评论

学校读者我要写书评

暂无评论

Hierarchical programming for Worst-Case Analysis of Power Grids 20

Hierarchical Programming for Worst-Case Analysis of Power Gr...

引用

Power Systems Computation Conference (PSCC)

作者： Djelassi, Hatim Mitsos, Alexander Fliscounakis, Stephane Panciatici, Patrick Rhein Westfal TH Aachen AVT Proc Syst Engn SVT Aachen Germany Reseau Transport Elect Versailles France

ISBN: (纸本)9781910963104

The aim of the present paper is to provide (n-1)-reliability to a power grid, guaranteeing nominal operation after the failure of any one out of n present grid components. Building on previous work (Fliscounakis et al., IEEE Transactions on Power Systems, 2013), a hierarchical programming problem is proposed to characterize the worst-case behavior of a power grid under a given contingency. The formulation is a mixed integer linear generalized semi-infinite program with a max-min program embedded. The different levels correspond to the choice of preventive actions, realization of uncertainties in the power supply and demand, and the choice of corrective actions. In order to model active components of the grid, models are proposed for load balancing and the behavior of phase-shifting transformers. Since no rigorous solution approaches are published for the problem at hand, the possibility of extending generalized semi infinite programming approaches to the present problem is discussed.

关键词： Hierarchical programming mixed-integer linear programming operation under uncertainty security-constrained optimal power flow worst-case analysis

来源：评论

学校读者我要写书评

暂无评论

Scenario modelling and optimisation of renewable energy integration for the energy transition

Scenario modelling and optimisation of renewable energy inte...

引用

作者： Victor CODINA GIRONES ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE

学位级别：博士

A large number of countries have engaged themselves in an energy transition towards more re- newable energy in their energy systems. Motivations stem mainly from the need to reduce CO 2 emissions, and from a desire of their population to phase out technologies such as nuclear. Most of these countries promote biomass, wind and solar energy sources, among other possibilities. How- ever the current rate of deployment of renewable energy systems globally is not sufficient to reach the CO 2 emissions reduction that would allow to maintain the global average temperature increase below the 2 ° C threshold. The main barriers to a wider integration of renewable energy systems are i) their limited realisable potential, ii) their still limited competitiveness, iii) their intermittence; iv) public acceptance often related to poor level of energy literacy amongst citizens. Citizens are key decision-makers. They must decide on energy policies and on the energy technologies they use, hence they have the power to foster or halt the energy transition. This thesis presents two different strategies for addressing the problem of the integration of re- newable energy sources for energy transitions. The first one (Chapter 1) consists in developing an energy modelling tool to help decision-makers understand the energy system and find their own answers. The modelling approach also includes a new methodology for the calculation of the total cost of a national energy system. A model of the Swiss energy system has been created following this approach, which serves as basis to develop the Swiss-Energyscope online calculator. This calculator and its model present an optimal trade-off between scientific rigour and user-friendliness, which allows the reproduction of the energy transition scenarios conceived by the Swiss Government, and consequently its use for energy policy making. The second strategy (chapters 2 and 3) profits from the possibilities offered by mathematical mod- elling and optimi

关键词： Renewable energy renewable electricity energy transition energy scenarios energy planning en-ergy policy national energy systems energy modeling decision-making support energy calculator energy literacy optimization mixed-integer linear programming Switzerland woody biomass conversion biomass conversion pathways biofuels exergy

来源：评论

学校读者我要写书评

暂无评论

Optimal Positioning of Mobile Emergency Resources for Resilient Restoration

Optimal Positioning of Mobile Emergency Resources for Resili...

引用

North American Power Symposium (NAPS)

作者： Poudel, Shiva Mukherjee, Monish Dubey, Anamika Washington State Univ Sch Elect Engn & Comp Sci Pullman WA 99164 USA

ISBN: (纸本)9781538671382

The extreme weather events have a significant impact on the aging and outdated power distribution infrastructures resulting in extended outages, the loss of critical services, and affecting customers' safety. This calls for ensuring a resilient operation by quickly restoring the critical services during natural disasters. Truck-mounted mobile emergency resources (MERs) are critical assets for fast electric service restoration across a distribution network, especially when customers do not have access to the main grid. This paper proposes a novel method for positioning and dispatching MERs to restore critical loads by dynamically forming restored networks or microgrids. A graph-theoretic approach is proposed to optimally locate MERs that maximally restores critical loads while simultaneously making the grid robust to post-restoration failures. The problem is modeled as a mixed-integer linear program that satisfies feeder's connectivity and operational constraints and assumes a radial operation in an open-loop distribution feeder with multiple tie-switches. Numerical simulations are performed to demonstrate the effectiveness of the proposed approach with the help of a multi-feeder test case with 7 tie-switches and 160 sectionalizing switches supplying 9 critical loads (CLs) using 4 MERs.

关键词： Distribution system restoration resilience mobile energy resources mixed-integer linear programming

来源：评论

学校读者我要写书评

暂无评论

Security-Constrained Unit Commitment Considering Wind Generation Uncertainty

Security-Constrained Unit Commitment Considering Wind Genera...

引用

International Conference on Power System Technology (POWERCON)

作者： Zhai, Fang Shi, Li-Bao Ni, Yi-Xin Tsinghua Univ Grad Sch Shenzhen Shenzhen 518055 Peoples R China Natl Key Lab Power Syst Shenzhen Shenzhen 518055 Peoples R China

ISBN: (纸本)9781538664612

This paper presents a two-stage stochastic programming model for security-constrained unit commitment considering wind generation uncertainty and network security constraints. In this model, some possible scenarios are generated for describing wind generation uncertainty. Furthermore, a scenario reduction technology based on heuristic simultaneous backward reduction is applied to improve the computational efficiency. For the solution of this model, the linearization method is applied to transform this nonlinear optimization model into a deterministic and linear optimization model so that a mixed-integer linear program algorithm can be employed. Finally, numerical tests performed on a six-bus power system demonstrate the validity and effectiveness of the proposed model and optimization strategy.

关键词： Unit commitment wind power stochastic programming scenario analysis mixed-integer linear programming

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：