When a multistage system is transferred from one stage to the next one, it could be affected by some disturbance. this kind of system is called a multistage uncertain system if the disturbance is an uncertain factor. ...
详细信息
ISBN:
(纸本)9781479953721
When a multistage system is transferred from one stage to the next one, it could be affected by some disturbance. this kind of system is called a multistage uncertain system if the disturbance is an uncertain factor. Based on the uncertainty theory and the equation of optimality in uncertain optimal control, a differential dynamic programming algorithm for an optimal control problem subject to a multistage uncertain system is established. the differential dynamic programming algorithm is implemented from an initial nominal control, which is provided by the genetic algorithm, to an optimal control of the problem step by step. Finally, a numerical example that the system is nonlinear withthe disturbance of linear uncertain variables is given to illustrate the feasibility of the algorithm.
the aim of this paper is to consider the supplier selection problem under a hierarchical decision system. With consideration of the inherent uncertainty, An decentralized bilevel optimization model under fuzzy random ...
详细信息
ISBN:
(纸本)9781479953721
the aim of this paper is to consider the supplier selection problem under a hierarchical decision system. With consideration of the inherent uncertainty, An decentralized bilevel optimization model under fuzzy random environment is developed for tracking a supplier selection problem with multiple items. For solving the bi-level programming model, an interactive fuzzy programming technique and an improved particle swarm optimization based on fuzzy random simulation (IPSO based FRS) are designed as a combined solution method. Finally, the results and comparisons analysis of a case study are presented to demonstrate the practicality and efficiency of the optimization method.
Task Scheduling is an important problem having many practical applications. More often than not, precedence constraints exist between tasks, and a common way to capture them is through Directed Acyclic Graphs (DAGs). ...
详细信息
the proceedings contain 19 papers. the special focus in this conference is on Software Language Engineering. the topics include: Framework for generating domain-specific property languages;a SAT-based debugging tool f...
ISBN:
(纸本)9783319112442
the proceedings contain 19 papers. the special focus in this conference is on Software Language Engineering. the topics include: Framework for generating domain-specific property languages;a SAT-based debugging tool for state machines and sequence diagrams;towards user-friendly projectional editors;island parsing without shipwrecks;a language composition editor;a framework for developing domain-specific debuggers;evaluating the usability of a visual feature modeling notation;a metamodel family for role-based modeling and programming languages;a choreographic framework for safe adaptive distributed applications;fUML as an assembly language for model transformation;respect your parents: how attribution and rewriting can get along;a disintegrated development environment;model checking of CTL-extended OCL specifications;unifying and generalizing relations in role-based data modeling and navigation;origin tracking in attribute grammars;dynamic scope discovery for model transformations;streamlining control flow graph construction with DCFlow and test-data generation for xtext (tool paper).
the design of an adequate test suite is usually guided by identifying test requirements which should be satisfied by the selected set of test cases. To reduce testing costs, test suite minimization heuristics aim at e...
详细信息
ISBN:
(纸本)9780769551852
the design of an adequate test suite is usually guided by identifying test requirements which should be satisfied by the selected set of test cases. To reduce testing costs, test suite minimization heuristics aim at eliminating redundancy from existing test suites. However, recent test suite minimization approaches lack (1) to handle test suites commonly derived for families of similar software variants under test, and (2) to incorporate fine-grained information concerning cost/profit goals for test case selection. In this paper, we propose a formal framework to optimize test suites designed for sets of software variants under test w.r.t. multiple conflicting cost/profit objectives. the problem representation is independent of the concrete testing methodology. We apply integer linear programming (ILP) to approximate optimal solutions. We further develop an efficient incremental heuristic for deriving a sequence of representative software variants to be tested for approaching optimal profits under reduced costs. We evaluated the algorithm by comparing its outcome to the optimal solution.
Serial link manipulators have been used for various situations in industry, i.e. welding, assembling, painting, polishing and machining. In machining by the manipulator, material is must be soft such as polystyrene fo...
详细信息
ISBN:
(纸本)9781479959556
Serial link manipulators have been used for various situations in industry, i.e. welding, assembling, painting, polishing and machining. In machining by the manipulator, material is must be soft such as polystyrene foam because the rigidity of the manipulator is small. Recently, polystyrene form machining by the manipulator is desired to make a lost pattern used in full-mold casting. In the machining operation, a trajectory following control is usually used because the desired trajectory can be generated from a cutter location data. When a manipulator is controlled to cut the polystyrene along the designed shape, various desired trajectories are generated in terms of robot coordinate system. To reduce the positioning error of the manipulator, suitable feedback gains of the controller should be calculated for each trajectory. However, the calculation of the feedback gains consumes much time because it needs to solve a non-convex optimization problem. therefore, faster calculation method of suitable feedback gains for each trajectory is desired. In this study, we propose an auto gain-tuning method of feedback gains using neural network with training. A training set has six training pairs prepared in advance, which consists of displacement of manipulator as input and optimized feedback gains as target. In the preparation, the feedback gains for the each trajectory calculated by the 4-1-4 polynomial interpolation is optimized by using the genetic algorithms. the neural network are trained by updating the synaptic weights with back propagation. After the training, the neural network can output suitable feedback gains for any trajectories. the effectiveness of the proposed method is confirmed through 1,000 times dynamic simulations with randomly generated trajectories.
To isolate and fix failures that occur in the field, after deployment, developers must be able to reproduce and investigate such failures in-house. In practice, however, bug reports rarely provide enough information t...
详细信息
ISBN:
(纸本)9780769551852
To isolate and fix failures that occur in the field, after deployment, developers must be able to reproduce and investigate such failures in-house. In practice, however, bug reports rarely provide enough information to recreate field failures, thus making in-house debugging an arduous task. this task becomes even more challenging for programs whose input must adhere to a formal specification, such as a grammar. To help developers address this issue, we propose an approach for automatically generating inputs that recreate field failures in-house. Given a faulty program and a field failure for this program, our approach exploits the potential of grammar-guided genetic programming to iteratively find legal inputs that can trigger the observed failure using a limited amount of runtime data collected in the field. When applied to 11 failures of 5 real-world programs, our approach was able to reproduce all but one of the failures while imposing a limited amount of overhead.
Optimization problems in Answer Set programming (ASP) are usually modeled by means of programs with weak constraints. these programs can be handled by algorithms for solving Maximum Satisfiability (MaxSAT) problems, i...
详细信息
Problems from the area of graph theory always served as fruitful benchmarks in order to explore the performance of Answer Set programming (ASP) systems. A relatively new branch in graph theory is concerned with so-cal...
详细信息
Attribute-Based Access Control (ABAC) maps of characteristics of users, objects and the environment to authorisations. ABAC is a highly versatile access control model well suited to domains such as web services. With ...
详细信息
ISBN:
(纸本)9781450330336
Attribute-Based Access Control (ABAC) maps of characteristics of users, objects and the environment to authorisations. ABAC is a highly versatile access control model well suited to domains such as web services. Withthe recent set of draft ABAC guidelines by NIST there is a clear desire to promote further adoption of the model. Despite this ABAC continues to face challenges relating to policy evaluation. In this paper we present a novel framework for ABAC policy evaluation based on negotiations and formalised in Answer Set programming. Categories and Subject Descriptors: C.2.0 [Computer-Communication Networks]: General - Security and Protection. D.4.6 [Operating Systems]: Security and protection - Access controls. I.2.3 [Artificial Intelligence]: Deduction and theorem Proving - Logic programming. General Terms: Security. Copyright 2014 ACM 978-1-4503-3033-6/14/09...$15.00.
暂无评论