Quantum linear system algorithms (QLSAs) have the potential to speed up Interior Point Methods (IPMs). However, a major bottleneck is the inexactness of quantum tomography to extract classical solutions from quantum s...
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Quantum linear system algorithms (QLSAs) have the potential to speed up Interior Point Methods (IPMs). However, a major bottleneck is the inexactness of quantum tomography to extract classical solutions from quantum states. In addition, QLSAs are sensitive to the condition number, and this sensitivity is exacerbated when the Newton systems arising in IPMs converge to a singular matrix. Recently, an Inexact Feasible Quantum IPM (IF-QIPM) has been developed that addresses the inexactness of QLSAs. However, this method requires a large number of gates and qubits to be implemented. Here, we propose a new IF-QIPM using the normal equation system, which requires fewer gates and qubits. To mitigate the sensitivity to the condition number and other input data-related parameters, we use preconditioning coupled with iterative refinement to obtain better complexity. Finally, we demonstrate the effectiveness of our approach on IBM Qiskit simulators.
In this manuscript, we examine linear optimization problems formulated in the standard format. A novel kernel function is employed to devise a new interior-point algorithm for these problems. The proposed method reduc...
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In this manuscript, we examine linear optimization problems formulated in the standard format. A novel kernel function is employed to devise a new interior-point algorithm for these problems. The proposed method reduces the number of iterations required for the Netlib test problems. The outcomes are subsequently derived using the self-dual embedding technique. The application of the kernel function facilitates the determination of search directions and the quantification of the distance between the current iteration and the mu-center of the algorithm. Incorporating specific lemmas tailored to this methodology is essential for establishing the optimal limit on iteration complexity. The methodology delineated in the work of K. Roos provides the framework for our investigation. Finally, numerical instances were examined to elucidate the theoretical findings and demonstrate the efficacy of the proposed innovative approach.
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ISBN:
(数字)9781611978308
ISBN:
(纸本)9781611978292
Get 10% off by pre-ordering this book.
This item has not yet published. Pre-order now and we will ship and process payment when the book becomes available.
This self-contained textbook provides the foundations of linear optimization, covering topics in both continuous and discrete linear optimization. It gradually builds the connection between theory, algorithms, and applications so that readers gain a theoretical and algorithmic foundation, familiarity with a variety of applications, and the ability to apply the theory and algorithms to actual problems.
To deepen the reader's understanding, the authors provide
many applications from diverse areas of applied sciences, such as resource allocation, line fitting, graph coloring, the traveling salesman problem, game theory, and network flows;
more than 180 exercises, most of them with partial answers and about 70 with complete solutions; and
a continuous illustration of the theory through examples and exercises.
A First Course in linear optimization is intended to be read cover to cover and requires only a first course in linear algebra as a prerequisite. Its 13 chapters can be used as lecture notes for a first course in linear optimization.
The alternating-direction-method-of-multipliers-based (ADMM-based) interior point method, or ABIP method, is a hybrid algorithm that effectively combines interior point method (IPM) and first-order methods to achieve ...
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The alternating-direction-method-of-multipliers-based (ADMM-based) interior point method, or ABIP method, is a hybrid algorithm that effectively combines interior point method (IPM) and first-order methods to achieve a performance boost in large-scale linear optimization. Different from traditional IPM that relies on computationally intensive Newton steps, the ABIP method applies ADMM to approximately solve the barrier penalized problem. However, similar to other first-order methods, this technique remains sensitive to condition number and inverse precision. In this paper, we provide an enhanced ABIP method with multiple improvements. First, we develop an ABIP method to solve the general linear conic optimization and establish the associated iteration complexity. Second, inspired by some existing methods, we develop different implementation strategies for the ABIP method, which substantially improve its performance in linear optimization. Finally, we conduct extensive numerical experiments in both synthetic and real-world data sets to demonstrate the empirical advantage of our developments. In particular, the enhanced ABIP method achieves a 5.8x reduction in the geometric mean of run time on 105 selected linear optimization instances from Netlib, and it exhibits advantages in certain structured problems, such as support vector machine and PageRank. However, the enhanced ABIP method still falls behind commercial solvers in many benchmarks, especially when high accuracy is desired. We posit that it can serve as a complementary tool alongside wellestablished solvers.
Due to the physical restriction of current CMOS technology, the study of majority based nanotechnologies has been progressing steadily. In this paper, we present a new exact synthesis algorithm for majority-of-three a...
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Due to the physical restriction of current CMOS technology, the study of majority based nanotechnologies has been progressing steadily. In this paper, we present a new exact synthesis algorithm for majority-of-three and majority-of-five boolean functions. Key in our approach is the formulation of constraints that encodes majority logic problems into linear optimization models. The proposed algorithm is able to generate optimal results for both depth and size minimization, while also minimizing the number of inverters and literals in the output function. With this new approach, we can decrease the total production cost of a circuit in technologies where inverters and literals are expensive to build, without losing optimal results for depth and size minimization. To evaluate our method, a comparison was made with two exact synthesis algorithms that can generate optimal results when considering depth and size as cost criteria, for majority-of-three and majority-of-five boolean functions. Since our method considers two additional cost criteria, the goal is to generate functions that are also optimal in relation to depth and size, but with less inverters and literals. The obtained results have shown that the proposed algorithm was able to further optimize 64% of all 220,376 compared functions, while also achieving equal cost results for the remaining 36%.
This paper discusses the linear optimization problem constrained by a system of bipolar fuzzy relational equations with max- composition, where the involved triangular norm is the Aukasiewicz t-norm. Although it is in...
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This paper discusses the linear optimization problem constrained by a system of bipolar fuzzy relational equations with max- composition, where the involved triangular norm is the Aukasiewicz t-norm. Although it is in general NP-hard, such an optimization problem can be reformulated in polynomial time into a 0-1 integer linear optimization problem and then solved taking advantage of well developed techniques in integer optimization.
We consider a generalization of the linear optimization problem with fuzzy relational (in)equality constraints by allowing for bipolar max-min constraints, i.e. constraints in which not only the independent variables ...
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We consider a generalization of the linear optimization problem with fuzzy relational (in)equality constraints by allowing for bipolar max-min constraints, i.e. constraints in which not only the independent variables but also their negations occur. A necessary condition to have a non-empty feasible domain is given. The feasible domain, if not empty, is algebraically characterized. A simple procedure is described to generate all maximizers of the linear optimization problem considered and is applied to various illustrative example problems. (C) 2011 Elsevier Inc. All rights reserved.
Different regional innovation profiles have forced policymakers to engage in innovation policymaking at the subnational level. As a regional approach, smart specialization has recently received attention in various co...
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Different regional innovation profiles have forced policymakers to engage in innovation policymaking at the subnational level. As a regional approach, smart specialization has recently received attention in various contexts, focusing on stimulating innovation according to each region's existing capabilities and prospects. Although this strategy benefits developing countries with vast cultural and geographical diversity, they have yet to adopt it. After reviewing regional innovation models to identify various variables affecting regional innovation, this article presents a linear optimization model for the division of work in industry, mining, and agriculture among the regions of a country and then implements it in Iran as a case study. Since the results of implementing the model match the findings of previous regional studies, the credibility of the mathematical optimization for smart specialization is verified.
Fang and Li introduced the optimization model with a linear objective function and constrained by fuzzy max-min relation equations. They converted this problem into a 0-1 integer programming problem and solved it usin...
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Fang and Li introduced the optimization model with a linear objective function and constrained by fuzzy max-min relation equations. They converted this problem into a 0-1 integer programming problem and solved it using the jump-tracking branch-and-bound method. Subsequently, Wu et al. improved this method by providing an upper bound on the optimal objective value and presented three rules for simplifying the computation of an optimal solution. This work presents new theoretical results concerning this optimization problem. They include an improved upper bound on the optimal objective value, improved rules for simplifying the problem and a rule for reducing the solution tree. Accordingly, an accelerated approach for finding the optimal objective value is presented, and represents an improvement on earlier approaches. Its potential applications are discussed. (C) 2011 Elsevier Inc. All rights reserved.
Suppose that X is a subspace of C(Omega) generated by n linearly independent positive elements of C(Omega). In this article we study the problem of minimization of a positive linear functional p of X in X, under a fin...
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Suppose that X is a subspace of C(Omega) generated by n linearly independent positive elements of C(Omega). In this article we study the problem of minimization of a positive linear functional p of X in X, under a finite number of linear inequalities. This problem does not have always a solution and if a solution exists we cannot determine it. In this article we show that if X is contained in a finite dimensional minimal lattice-subspace Y of C(Omega) (or equivalently, if X is contained in a finite dimensional minimal subspace Y of C(Omega) with a positive basis) and m=dim Y, then the minimization problem has a solution and we determine the solutions by solving an equivalent linear programming problem in R-m. Finally note that this minimization problem has an important application in the portfolio insurance which was the motivation for the preparation of this article.
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