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A number of fuzzy number ranking methods have been proposed by the researchers in recent years. However, most of them have exhibited several shortcomings associated with non-discriminative and counter-intuitive problems, especially, when the fuzzy numbers are symmetric fuzzy numbers or crisp numbers. In this paper, we propose a new method for ranking generalized fuzzy numbers where the weight of centroid...
Spatial statistics of atmospheric effects in InSAR measurements are of great importance for understanding and mitigating the effects, which provide reliable tools to assess the InSAR data quality and the derived parameters (e.g., elevations and deformations). Besides, a comprehensive cognition of the spatial statistics of atmospheric effects could be conducive to the development of InSAR meteorology...
The paper introduces an isolated word speech recognition system in which the speech signal is acquired in real time, Half Raised-Sine function is applied to the MFCC parameters of the audio files, and improved DTW algorithm is implemented. Experimental results show that compared the conventional DTW with the improved DTW algorithm, the latter can obtain a better recognition rate and faster response...
This paper presents the use of camera, sonar sensor, and localization system on a wheeled mobile robot (WMR) for obstacle avoidance and parking control. The camera provides image of the surrounding. Distance between the WMR and object or obstacle can be obtained by image process and distance computation algorithm. Fuzzy system and genetic algorithm are integrated in the control scheme that can effectively...
This paper demonstrate the reform of software engineering talent cultivation which satisfies the educational goals for personal, interpersonal and system building skill that are codified in the CDIO syllabus. The reform of the software engineering talent cultivation based on CDIO enable students master a deep working knowledge of technical fundamentals, lead in the creation and operation of new products...
Upsetting is an important technics for improving the inner structure of metal. The stress, strain and temperature distribution can influence the effect of upsetting. To achieve good effect of upsetting, a prediction model of upsetting based on thermo-elastic-plastic finite element equation is built. The three-dimensional upsetting process is studied by using the method of finite element Lagrange analysis,...
In this paper, chaos theory was used to analyze the influence of tensile stress on electrochemical noise about 7075-T76 aluminum alloy in 3.5%NaCl solutions. The result shows that the applied stress accelerated the formation of electric double-layer and the greater the stress, the shorter the formation time. Electrochemical noise data in the phase had strong linear autocorrelation whose largest Lyapunov...
In the study, neural network theory was used to build a nonlinear model for high precision gyroscope reflecting the relationship between temperature and drift.The result shows that types of neural network and input sample have great influence on model precision. High precision gyroscope is sensitive to temperature. The input sample must take account of the continuous temperature and mean temperature...
In the study, back-propagation neural networks (BP-NN) theory and genetic algorithm (GA) were used to build a nonlinear prediction model reflecting the relationship between technics parameters of electric field aging and mechanical properties of LY12 aluminum alloy. In this model, electric field intensity, aging temperature and time were as input parameters. Tensile strength, yield strength and micro-yield...
The impact behavior of spraying copper particle on substrate in low temperature and high velocity oxygen/air fuel(LT-HVO/AF) spraying process is studied by using the method of finite element Lagrange analysis, analyzing the relation of particle velocity, deformation behavior and temperature. It is found that impact velocity directly influences the entire impact process and confirmed that there is...
Wireless mesh networks (WMN) are believed to be a highly promising technology and will play an increasingly important role in future generation wireless mobile networks. Routing in WMN is a challenging problem as a result of highly dynamic topology as well as bandwidth and energy constraints. The swarm intelligence paradigm, such as ant colony optimization (ACO), has recently been demonstrated as...
This paper presents experimental investigations on a reflex triode vircator driven by a 400 kV, 10 kA electron beam. Two types of cold cathodes, based on stainless steel and carbon fiber, were tested in this system. The microwave signals were discussed by time-frequency analysis. The stainless steel cathode exhibited an obvious frequency hopping observed from the microwave pulse. Interestingly, for...
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