In this paper, the reciprocal theorem is applied to research on the bending problem of rectangular plates with opposite simple supported and clamped edges under distributed bending moment and a concentrated bending moment acting at any of its points, the accurate solution of the problem are given.

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Theequivalence percolation resistance law is accurate enough to be used in productivitycalculation of horizontal well pattern.(3) Productivity of mixed well pattern of horizontalwell or multilateral horizontal well and vertical well is constructed and formulae are simpleenough to be used in the oilfield. The patterns include 5-spot pattern,7-spot pattern and9-spot pattern.(4) Productivity formula of united rectangular well pattern of horizontaland vertical wells is constructed. By this formula, the calculation results show that fora horizontal well length, there is a shape factor at which the productivity of the patternis biggest. So optimum method of the well pattern is proposed.(5) A new concept ofdimensionless length of horizontal well is advanced and the relationship of optimum shapefactor of the rectangular well pattern against dimensionless length of horizontal well ispresented. The influences of length of the horizontal well, area of the well pattern unitand the thickness of reservior are concerned.

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Ai Qing's poems after his comeback to the republic of letters have reflected his great thoughts. Ai Qing is still as adept as he was in his early years of composition at creating vivid and accurate images and developing the theme by means of symbolism. As still waters run deep, Ai Qing's language shows a kind of simplicity.

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The solubilities of rubidium nitrate in water, water plus methanol, and water plus ethanol have been determined using a simple accurate analytical method at different temperatures.

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To the problem that large-scale labeled samples isn't easy to acquire in the course of SVM training, the active learning strategy is used in the SVM training and an incremental training algorithm of active SVM based on the uncertainty based sampling of distance ratio is proposed in the paper. The experimental results show that the active SVM learning strategy can considerably reduce the labeled samples and costs compared to the passive learning method, and at the same time it can ensure the accurate classification performance is kept as the passive SVM and also expedite the SVM training.

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