The distribution of temperature stress was calculated by finite element analysis. The results showed when the surface temperature of concrete was higher than 110℃, the temperature stress was more than 4 MPa without regard to the creep. This might be lead to the damage of the surface of concrete. At the same time, a lot of microstructure analysiss such as XRD, SEM, IR, HSA etc. were done to analysis the difference of the component and microstructre of concrete before and after corrosion. The results indicated that the decomposion of CSH gel and calcium hydroxide and the creation of dilatability calcium oxide were the internal reason of the deterioration of concrete in the corrosion form of high heat.

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European Cassini spacecraft flew within 310 miles (500 kilometers) of the Dione's pale surface last week, showing it possessed a heavily cratered surface but no presence of an atmosphere.

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It is defined by the direct distance between image surface and a threshold surface which should be constructed first.

通過構(gòu)造一個(gè)閾值曲面九九在线一区，用圖像曲面與閾值曲面間的有向距離來(lái)定義符號(hào)距離曲面色色色射网色射射射。

It includes an optimized curve fitting algorithm based on the least-squares method and a surface lofting algorithm in which a interpolation function is employed to provide a continuous variation of the parameter in one direction over the entire lofted surface.

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Since the B-spline is a locally supported function, the smoothing formula can be strictly limited in a neighborhood of each point. The smoothing surface defined by the smoothing formula has the same convexity as that of the original image. Secondly, the edge points are detected by either computing the local extremum points of the directional derivative or computing zero-crossing of the second-order directional derivative of the smoothing surface. Finally, an example of an edge detector is given.

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A algorithm of dim small targets detection in infrared image is proposed. Image is processed by using median filter and unsharp mask. The infrared image intensity surface is fitted by Haralickd discrete orthogonal polynomial basis function,and then the maximum points are detected on the fitted intensity surface by convolving the image with the second order directional derivative operators.

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A solid bounded by two parallel planes and such a surface,especially such a surface having a circle as its directrix.

圓柱體由兩個(gè)平行平面和這樣的表面91.com麻豆，特別是有一個(gè)圓作為其準(zhǔn)線的平面所形成的柱體

First, we extend the general finite element method from the function surface to the parameter function. Second, we bring this kind of method into the design of rational Bézier minimal surface. Third, we transform the problem of Dirichlet energy function into the problem of minimizing a discrete objective function.

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The simulation results of smooth metal surface with roughness of 1.6 μm accord with the experimental data very well, but the simulation results of rough metal surface with roughness of 6.8 μm disaccord with the experimental data.

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