The atoms obtained by single-channel matching pursuit (SCMP) are unstable, and the solution is not unique, moreover, the reconstructed profiles lack lateral continuation. Multichannel matching pursuit (MCMP) can overc...
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ISBN:
(纸本)9781467321969
The atoms obtained by single-channel matching pursuit (SCMP) are unstable, and the solution is not unique, moreover, the reconstructed profiles lack lateral continuation. Multichannel matching pursuit (MCMP) can overcome the above shortcomings because it exploits lateral coherence as a constraint and decomposes all seismic signals at the same time and gets the best time-frequency atoms that be shared by all the seismic traces. But the existed MCMP algorithm is liable to being influenced by noise and has quite low computing efficiency. This paper proposes an MCMP algorithm that decomposes all seismic signals at the same time through changing the criterion function with Genetic Algorithm. The experiments for both synthetic and actual seismic data show that our algorithm can obtain stable atoms, reduce the influence of data noise to some extent, and improve computing efficiency by more than 100 times.
A combined iteration method of load identification method is presented concerning one type of structure with nonlinearity. The proposed method realizes the load identification of the nonlinear dynamical system by comb...
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ISBN:
(纸本)9780769547923
A combined iteration method of load identification method is presented concerning one type of structure with nonlinearity. The proposed method realizes the load identification of the nonlinear dynamical system by combining and iterating the finite element method and the active control method. For a conical shell-belting combined system, the numerical study regarding the load identification demonstrates the validity of combined iteration method, which can plays a guiding role in the load identification of vibration test respecting aerospace structures, such as missile, aerospacecraft, aerospaceplane, rocket and so on, making great contribution to the development of the aerospace industry.
This paper analyzes the evolution of transaction and risk control mechanism by third-party guarantee in international trade and points out that the risk control in international E-commerce was an innovation to traditi...
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This paper realizes the tactile and slip perception of prostheses finger by using of PVDF (Polyvinylidene Fluoride) piezoelectric membrane. The mathematics model of brushless DC motor is constructed and the characteri...
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As increasing the processor performance, new various applications of mobile robots are proposed and evaluated, e. g., the manipulations and observations in the extreme environments where human has difficulties for acc...
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ISBN:
(纸本)9780769548845;9781479902767
As increasing the processor performance, new various applications of mobile robots are proposed and evaluated, e. g., the manipulations and observations in the extreme environments where human has difficulties for accessing directly, deep ocean, space, nuclear plants, rescue and service tasks to assist and collaborate human. One of the important issues to be solved is the adaptability to their working environments. In this paper, we propose an adaptive controlsystem using Central Pattern Generator (CPG), which generates rhythmical signals to control periodical motion such as swimming pattern, walking locomotion, heartbeats. The adaptive controlsystem has been developed to control motion of a snake-like robot., and evaluated by changing working environments.
It is difficult for traditional control theory to deal with the system which has the characteristic of uncertainty, high nonlinearity and complex tasks. Fuzzy control simulates people' control experience, it doesn...
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ISBN:
(纸本)9780769547923
It is difficult for traditional control theory to deal with the system which has the characteristic of uncertainty, high nonlinearity and complex tasks. Fuzzy control simulates people' control experience, it doesn't depend on the actual model of the object. Fuzzy controller has widely used in our world when encountered uncertainty nonlinearity. A fuzzy controller is designed here based on fuzzy control principles. The effect of membership function to control effect is analyzed corresponding to experimental results. A comparison of control effect is done through changing system parameter and membership function. Through experiments, the results show fuzzy control can process the nonlinearity property of the system well;triangular membership function is more sensitive than the trapezoid membership function in actual using.
A new kind of fuzzy adaptive method is proposed to transfer the multi-objective function to single objective function under the same constraint conditions. Based on multiple dynamic programming models, an improved dyn...
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ISBN:
(纸本)9781467318556;9781467318570
A new kind of fuzzy adaptive method is proposed to transfer the multi-objective function to single objective function under the same constraint conditions. Based on multiple dynamic programming models, an improved dynamic programming method with different step-length to the solution for an optimal distribution of generators in an electrical power plant has been developed. This method overcomes the problem that due to improper selection of searching step-length. The experimental results show that the dynamic programming method based on fuzzy adaptive theory has a good energy-saving effect and engineering application value.
This paper addresses on the stability analysis of the attitude controlsystem using quaternion-based feedback control law that accommodates arcus-cotangent as a discontinuous elements in the control law. Three argumen...
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engineering of information and controlsystems for process and manufacturing facilities is a complex multidisciplinary effort. The engineering processes are often interwoven between different teams and enterprises mak...
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ISBN:
(纸本)9781467303118
engineering of information and controlsystems for process and manufacturing facilities is a complex multidisciplinary effort. The engineering processes are often interwoven between different teams and enterprises making both the exchange of technical engineering data and management of engineering processes challenging. Business process management is applied to the engineering processes in order to improve engineering effectiveness and ease management of distributed activities. Modeling engineering processes as business processes and implementing them executable enables many tasks to be automated and supported with information systems. In combination with service bus based system integration the information exchange and the use of various services can be enhanced. A prototype service infrastructure with engineering services has been implemented to prove the concept. Exemplary engineering processes have been developed to demonstrate the feasibility of executing routine tasks automatically and improving management of both human and information system tasks.
The gyroscope system is widely applied in various areas of engineering. From the state response of the gyroscope system, it is shown that the gyroscope system have highly nonlinearity and chaotic characteristic. In th...
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