To improve the precision of tree biomass parameter calculation, this paper explicates the principle, method and process to estimate the parameters of tree biomass by the nonlinear least square according to the formula of allometry method. It gives the formula to calculate the variance and covariance estimated parameters, and reveals the essence of logarithmic linearization regression of power function.

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This anteal analysed the the cadasteral surveying precision and evaluation by the way of analytic method and, strictly proved the formulae in relation to statistics method,and put forward the theory and method which can examine fortion of boundary point by allowable error,It is valuable in assessment of achievement quality of cadastre survey work developed extensitely at present.

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By coincidence method, the calibrationn technique of ZnO:Ga crystal response to single heavy charged particle was established, the waveform response to the single alpha particle was measured, the experiments data were analysed, and the time response to single proton was gained from the plasma time relationship.

利用符合法原理美裸网站，建立了ZnO：Ga晶體對(duì)單重帶電粒子響應(yīng)的標(biāo)定方法，得到了該晶體對(duì)單α粒子的響應(yīng)曲線日韩欧美综合精品，并對(duì)此進(jìn)行了分析国产孕妇乱子伦精品免费观看，根據(jù)等離子體時(shí)間的相對(duì)關(guān)系得到其對(duì)質(zhì)子的時(shí)間響應(yīng)范圍。

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We analyzed and proved that this kind of mounting can cover all useful sky area and has much lower and smoother angular velocity and acceleration than the altazimuth one. IN THIS PAPER WE ALSO DISCUSSED THE RELATIONSHIP BETWEEN TWO MOST OFTEN USED ALT-ALT coordinate systems (SN-ALT-ALT, EW-ALT-ALT coordinate system) and the sidereal hour-angle coordinate system, the horizon coordinate system.

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This paper firstly presents the hardware of the alternating current servo system, expounds the theory of neural network, fuzzy c...

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