A powerful, easy-to-use analytic tool for nonlinear problems in general, namely the homotopy analysis method, is further improved and systematically described through a typical nonlinear problem. In this paper, a Nonl...
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ISBN:
(纸本)9780769539829
A powerful, easy-to-use analytic tool for nonlinear problems in general, namely the homotopy analysis method, is further improved and systematically described through a typical nonlinear problem. In this paper, a nonlinear Fredholm fuzzy integral equation is solved by using the homotopy analysis method (HAM). The approximate solution of this equation is calculated in the form of a series which its components are computed easily. The convergence and error estimate of the proposed method are proved. Numerical example is studied to demonstrate the accuracy of the present method
The process of improving the rotating machinery is tightly connected with reduction of vibrations level. It can be implemented by using active bearings. The present paper considers the control system of the active hyb...
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ISBN:
(纸本)9781509013227
The process of improving the rotating machinery is tightly connected with reduction of vibrations level. It can be implemented by using active bearings. The present paper considers the control system of the active hybrid fluid-film bearing. The closed-loop system allows controlling the rotor position. In general, conventional controllers based on a PID law cope with such problems rather well. However, in many cases the more advanced controllers can show better results. Therefore, a nonlinear controller with adaptive gain coefficient has been developed during the research. The control law considers the features of operation of a hybrid fluid-film bearing. The resulting system allows effective holding the rotor position within the preset limits under variable load. The controller also allows avoiding the excessive vibrations reduction since it is not necessary in most cases. The considered active hybrid bearings can be used in rotating machinery exposed to excessive vibrations and complex loads. In particular, they can be successfully used in rotating machines equipped with automatic balancing systems where the complex loads are caused by operation of the autobalancing device itself.
This article uses nonlinear finite element (FEM) to analyses the mining tunnel surrounding rock mass through 3D model([1]). The study shows that the displacement and the stress of the surrounding rock of the main tunn...
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ISBN:
(纸本)9780769539829
This article uses nonlinear finite element (FEM) to analyses the mining tunnel surrounding rock mass through 3D model([1]). The study shows that the displacement and the stress of the surrounding rock of the main tunnel and branch tunnel increase with the embedding depth of the tunnel. The research also revealed the plastic zone, stress concentration areas and delamination transition of the stress.
In an IT and software industry, new and improved technologies are always on the rise. We have to keep ourselves updated with these innovations, in order to develop an effective product for commercial use. On the "...
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ISBN:
(纸本)9781538608074
In an IT and software industry, new and improved technologies are always on the rise. We have to keep ourselves updated with these innovations, in order to develop an effective product for commercial use. On the "world wide web", an application is interconnected with various services and plug-ins, making it necessary for the application to be compatible with maximum technologies. Working in Server Development department, we have a more crucial role to play to ensure an application's efficient working, as almost all of them, today, is online. We discuss here, various technologies used in different projects from cloud services to application programming.
The use of fast electric output regulation of combined heat and power (CHP) units can enhance the flexible operation of industrial park electric-heat coupling system (IPEHS) and promote the use of new energy sources. ...
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This conference proceedings contains 55 papers. Fifty-two papers are indexed separately. The topics covered are: distributed systems structure;architecture;semantics of parallel programming;distributed data bases;perf...
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This conference proceedings contains 55 papers. Fifty-two papers are indexed separately. The topics covered are: distributed systems structure;architecture;semantics of parallel programming;distributed data bases;performance analysis;security and reliability;distributed scheduling;local area networks;language constructs;andapplications.
This paper presents an application of neurobiological motor principles to the control of humanoid robot reaching movements. The model is mainly based on the hypotheses that the energy of motoneurons;signals is continu...
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ISBN:
(纸本)9781424428823
This paper presents an application of neurobiological motor principles to the control of humanoid robot reaching movements. The model is mainly based on the hypotheses that the energy of motoneurons;signals is continuously minimized along the motion and that dynamic and static efforts are processed separately. This paradigm is used to control the robot HRP2 by considering a dynamic model of the arm including, for each degree of freedom, two second order low-pass filters modeling the neuromuscular system defined by a pair of antagonist muscles. The optimal control problem is solved as a nonlinearprogramming problem by using a direct transcription method coupled with the optimization software Ipopt. This approach allows to generate realistic movements with anthropomorphic features such as quasi-rectilinear trajectories and bell-shaped velocity.
This study used optimization via ABC-PSO mixed coding to solve problems involving mixed integer nonlinearprogramming (MINLP) and mixed integer linear programming (MIILP). The combination of ABC (Artificial Bee Colony...
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ISBN:
(纸本)9781450364126
This study used optimization via ABC-PSO mixed coding to solve problems involving mixed integer nonlinearprogramming (MINLP) and mixed integer linear programming (MIILP). The combination of ABC (Artificial Bee Colony) and PSO (Particle Swarm Optimization) is assessed with reference to seven benchmark problem tests. The A algorithm was then tested and analyzed. The proposed approach is shown to compare favorably with other established meta-heuristic techniques on the basis of the results provided in this study. This study also considers the specific attributes of the ABC-PSO algorithm with a focus on the potential consequences of application for actual constrained optimization.
In this paper an effective approach is proposed for obtaining optimal solution for a class of nonlinear problem (P). By utilizing linearization technique, the relaxation linear programming (RLP) about the (P) is estab...
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ISBN:
(纸本)9781846260612
In this paper an effective approach is proposed for obtaining optimal solution for a class of nonlinear problem (P). By utilizing linearization technique, the relaxation linear programming (RLP) about the (P) is established, thus the initial non-convex nonlinear problem (P) is reduced to a series of linear programming (RLP). The proposed algorithm is convergent to the global optimization value of (P) through the successive refinement of the feasible region and optimal solutions of a series of RLP. And finally the numerical examples are given to illustrate the efficiency and feasibility of the proposed algorithm.
In this paper, a method of the minimum time fault diagnosis based on nonlinear GPS/SINS system model is presented, constructing a kind of nonlinear integrated navigation system model;puting forward a nonlinear CDKF-H ...
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ISBN:
(纸本)9780769549354
In this paper, a method of the minimum time fault diagnosis based on nonlinear GPS/SINS system model is presented, constructing a kind of nonlinear integrated navigation system model;puting forward a nonlinear CDKF-H infinity filtering method;in the framework of Bayesian, using the dynamic programming algorithm, constructing the fault diagnosis object function, it can be proved theoretically that the object function can achieve minimum value and then derivating the relationship between threshold and the false alarm rate. Simulation shows that the proposed algorithms can achieve highly precision and have a good effect on abrupt fault detection.
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