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Reflection coefficient of underwater materials can be calculate by measuring impedance above the sample. some techniques which measure reflection coefficient are based on the sound pressure. This paper introduces a method for measuring reflection coefficient with vector hydrophone which can measure the instantaneous sound pressure and sound particle velocity. Then the reflection coefficient can be...
A shape feature-based and intersection-free method for morphing two planar simple polygons with corresponding vertices is presented. Based on the convexity-preserving morph of planar convex polygons and the convexity preserving morph of compatible planar triangulations with different convex boundaries, we present the method in this paper for the morph of two simple planar polygons which embeds the...
Ray casting Algorithm is one of the basic algorithms used in the volume rendering of three dimensional data, which has a good operating and a simple description, but there are some obvious problems on the rendering speed and the precision. In this paper, a new intelligent volume rendering method, integrated the particle swarm optimization on transfer function design with the Ray-leaping rendering...
In order to improve the effectiveness of remote sensing image enhancement, an enhancement algorithm based on multi-scale Retinex was presented and which can make up the deficiency of traditional wavelet algorithm that losing part information when image enhancement. The principle and realization methods of multi-scale Retinex and wavelet were calculated. The experiment of panchromatic and multicolor...
In quantitative logic, every atomic formula has the same truth degree. To overcome the shortcomings of truth degree, this paper gives randomized truth degree by introducing randomized mapping in Lukasiewicz three-valued propositional logic. Randomized truth degree is a generalization of truth degree, and the role of the different atomic formula is reflected in it. Based on randomized truth degree,...
The prior distribution information of the factor is usually available, but it is ignored by the standard optimal design. For the sake of considering the distribution information of the factors in an optimal experimental design, the following works are done: Firstly, the least expected squares estimator (abbreviated as ELSE), which can consider the distribution information of the factors, is defined...
Meta-models are widely used to facilitate the analysis and optimization of engineering systems that involve computationally expensive simulations. Kriging is widely used as a meta-modeling technique to build surrogate models. However, the assumption of a stationary covariance structure underlying Kriging does not hold in situations where the level of smoothness of a response varies significantly....
The modeling of the stratosail of a stratospheric satellite includes both the modeling of a flexible tether and that of a rigid stratosail body, thus being a complicated and flexible-rigid coupled modeling process. This paper analyzes the stress of the stratosail and calculates the size and direction of the tensile force of the tether in different states in accordance with the moment-equilibrium principle...
The mathematical model on polymer-surfactant flooding is established in this paper. The viscosity of polymer-surfactant solution with different concentrations is measured with Brookfield Viscometer. On this basis, the polymer-surfactant injection concentration and quantity are optimized by the numerical simulation method. The geologic model controlled by facies is built. Then numerical simulation...
In order to improve real-time and robustness of the lane detection and get more ideal lane, in the image preprocessing, the filter is used in strengthening lane information of the binary image, reducing the noise and removing irrelevant information. The lane edge detection is by using Canny operator, then the corner detection method is used in getting the Image corners coordinates and finally using...
To further enhance the performance of existing watermarking scheme, watermarking algorithm based on kernel fuzzy clustering and singular value decomposition in the complex wavelet transform domain is proposed in this paper. Firstly, the host image is decomposed by complex wavelet transform. Then, the singular value of the low-frequency coefficients after image complex wavelet is selected as an embedded...
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