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In the study on application of Geography Information System, spatial interpolation is a basic method for converting vector data model into grid data model, of which inverse distance interpolation and linear interpolation are widely used.

在GIS应用研究方面,空间插是将矢量数据转换成栅格数据的一种基本方法,其中距离倒数插和线性拟合插等方法被广泛采用。

The power supply can acquire real time online voltage signal of electric network and input into inverting system; generate synchronous signal and effective value of amplitude signal, then become SPWM pulse by wave generating chip SA4828. High degree sinus and good anti-disturbance performed power supply inverting can be also realized.

该电源可以在线实时采集电网电压送入逆变系统,实时产生同步信号和幅有效信号,通过波形产生芯片SA4828实时产生和采样电压同频同步且幅可调的正弦脉宽调制脉冲,并采用开关线性复合功率变换技术,实现高正弦度和强抗负载扰动性能的电源逆变。

A detailed analysis of the main circuit introduction, control method and working principle of the direct-drive wind energy conversion system are given to introduce the two important parts a of this paper: First part is the control method of the multiple boost convertor, the important instantaneous current control method of this paper is given through the analysis of the main circuit structure, control method and working principle. Then a steady-state analysis for low-frequency, a high-frequency component analysis, and a closed-loop tracking performance analysis for dynamic response are provided to analyze the method proposed; And the second part is the control method of invertor.

在系统变流器整体结构分析的基础上,引出本文重点研究的两个变流环节的控制:第一部分是系统升压斩波器的控制,通过分析相关主电路结构、原理,建立了数学模型,引出本文重点研究的瞬时控制策略的概念和具体实现,并对升压斩波器的瞬时控制策略进行了详细的高频、低频模型分析和稳态、动态性能分析;第二部分是系统并网逆变器的控制,通过对逆变器主电路的数学建模和控制要求分析,研究了并网逆变器的瞬时控制策略,包括电感电流控制内环和直流电压控制外环的具体设计和实现方法。

The results show that the calculated cell parameters are in agreement with the experimental ones. The interactions between Li—N and Al—N are strong ionic bonds in Li3AlN2. The interaction between N and H is strong covalent bond and the interaction between Li and N is strong ionic bond in LiNH2. The calculated reaction enthalpies are 23.7 and 55.3 kJ/mol, respectively, which are in agreement with the experimental ones.

结果表明:Li3AlN2的Li—N、Al—N键主要为离子键,LiNH2的N—H键主要为共价键,Li—N键主要为离子键;298 K时贮氢反应的反应焓计算分别为23.7和55.3 kJ/mol,与实验均符合得较好;反应中各固态、气态物质的晶胞的结构优化后的晶格常数、键长与键角等与相应的实验均符合较好。

Main contents and conclusions are: 1 The ionization current was measured continuously by a charge-integration method with a computer after the introduction of radon into the chamber.

主要内容及结论:1充氡后利用计算机连续进行电离电流累积测量,得到了精细的电流随时间的变化曲线,可清楚看出氡及其子体的生成衰变造成的电离电流的生长—稳定—衰减过程,与理论计算进行了比较,由电离电流衰减速度的变化得出氡吸附作用的影响,并测量到电离室冲洗后氡的反扩散现象;2由已知活度的标准源定出相对测量的刻度系数K,K=24.62 Bq/pA,对同一个监测源以半年为周期进行多次测量后得出稳定性符合要求;3通过测量电离电流和气压的关系曲线以及不同气压下的饱和曲线,确定了常规的工作条件;4测量了盐酸清洗电离室内表面降低本底的效果;5不确定度分析表明相对测氡的扩展不确定度(k=2)小于5%,由本底涨落得出探测下限为0.5 Bq;6理论上对壁损失修正进行了计算,实验上保持电离室工作在饱和区的情况下,测量了不同气压下电离电流的变化,从中得出了壁损失随气压变化的规律,可以看出,电离电流的实测和计算随气压变化规律基本一致;当气压大于125 kPa时,端效应等其它因素造成的影响不大于2%,因而在此工作条件下,测量电离电流后通过计算修正壁损失可以实现近似的绝对测氡,提出了进一步提高绝对测量准确度的方法。

The algorithm adopts classical bilinear interpolation algorithm in the area of image other than the edges;concurrently the stairway detection is further made according to the outcomes of Canny edge detection to sift out the horizontal and vertical edges which will not produce jaggies distortion;but in edge areas where severe jaggies distortion will occur when using classical algorithm,the stairway thinning-based interpolation algorithm is implemented.This interpolation algorithm keeps stairways from being enlarged when zooming out the image,hence the goal of reducing jaggies distortion is achieved.

该算法在图像的非边缘区域采用经典的双线性插算法;同时根据Canny边缘检测的结果,进一步进行阶梯检测,滤除不会产生锯齿失真的竖直和水平边缘;而在使用经典算法会产生严重锯齿失真的边缘区域,运用基于阶梯细化的插算法;该插算法在放大图像的同时,抑制边缘中的阶梯被放大,从而达到减少锯齿失真的目的。

We will demonstrate the specification of reference prior distribution on the random covariance matrix. We will consider the approximate uniform shrinkage prior and approximate Jeffreys' prior. Both are formulated based on the approximated likelihood function. Under generalized linear mixed models, we show that the posterior mode under Jeffrey's prior is asymptotically closer to the REML estimate than the mode under uniform shrinkage prior does.

在广义线性混合模式下,我们证明了在样本数很大时,随机效应之变异数成份的后验众数和REML估计会近似相等,同时也建立了后验众数和REML估计的近似关系式,并提出了比较二种后验众数与REML估计之间远近的准则。

The effects of raw material treatment, Jerusalem artichoke flour concentration, initial pH value on the ethanol fermentation performances of Schizosaccharomyces pombe were investigated in a shaking flask, at the same time, the effects of the constant-pH fermentation and the uncontrolled-pH fermentation, aeration rate on the ethanol fermentation were also studied in a 5 L jar fermenter.

在摇瓶中考察了原料预处理方法、原料浓度和初始pH对乙醇发酵的影响,进而在5 L发酵罐中考察了未调控pH和恒定pH与通气情况对乙醇发酵的影响。

This means to use the value of the first submatch, s1, as a key into the env map.

它表示的是,使用第一个子匹配的 s1 作为 env map 的键来求

There are some mature curve fitting methods in the reverse engineering, such as Lagrange interpolation, piecewise polynomial interpolation, least square method and spline interpolation.

成熟的曲线拟合方法有拉格朗日插法、分段多项式插法、最小二乘法和样条曲线插法等,本文在分析各自优缺点的基础上,提出选用三次样条曲线拟合法。

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年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。

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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.

老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。