查询词典 ellipses

And then some ellipses that AUGR estimator is better than the OLS estimator and AUGL estimator is better than the OLS estimator are given, respectively.Second, the definition of the almost unbiased unified biased estimator is proposed. This definition includes the familiar almost unbiased estimators in literatures, and it is the unified expression of the familiar almost unbiased estimators. Followed the biased and variance are compared of AUUB estimator and the unified biased estimator, respectively. AUUB estimator has smaller bias than UB estimator and the variance of AUUB estimator is between the variance of UB estimator and 4 times of the variance of UB estimator. Finally the properties of AUUB estimator are discussed. The conclusion is gained that there are parameters made AUUB estimator is better than OLS estimator in terms of their mean square error. The sufficient and necessary condition that AUUB estimator is admissible is given. The ellipse is given that AUUB estimator is

然后给出了几乎无偏统一有偏估计的定义，该定义包括了文献中常见的几乎无偏估计，实现了常见几乎无偏估计的统一表达式；接下来我们比较了几乎无偏统一有偏估计与统一有偏估计的偏度与方差，得出了几乎无偏统一有偏估计比统一有偏估计有较小的偏度，几乎无偏统一有偏估计的方差介于统一有偏估计的方差与统一有偏估计的方差的四倍之间的结论；最后我们对统一有偏估计的主要性质作了讨论，证明了存在参数K，S使得几乎无偏统一有偏估计在均方误差意义下优于最小二乘估计的结论，给出了几乎无偏统一有偏估计为可容许估计的充要条件，还给出了在均方误差阵意义下几乎无偏统一有偏估计优于最小二乘估计的椭球。

After he had analysed the large and precise observational data of Tycho Brahe, he found that the planets orbit on ellipses .

在分析了第谷·布雷赫的大量的精确的观察资料及数据后，他发现行星在椭圆轨道上运行。

A closed curve is a path that repeats itself, and thus encloses one or more regions. Simple examples include circles, ellipses, and polygons .

封闭曲线的路径是循环的，包围一个或更多区域，简单的例子如圆、椭圆、多边形。

A closed curve is a path that repeats itself, and thus enclose s one or more regions. Simple examples include circles, ellipses, and polygons.

封闭曲线的路径是循环的，包围一个或更多区域，简单的例子如圆、椭圆、多边形。

To be specific, its generalized characteristic polynomial has positive double roots, which we proved further has only a double, root by using the affine transformation and inverse affine transformation, his easy to detect interference accurately between two ellipses using NFB analytic equation.

根据该解析方程不仅可以直接对任意两个椭圆之间的干涉性做出精确判断，并且可由此绘出NFB的轨迹图，同时使用可视化方法给出了快速粗略的判断。

Draw five more ellipses over the ladybug body shape and group them together.

提请5更多的省略号超过瓢虫的身体形态和组一起。

As addenda, a tennis and fives court, a shrubbery, a glass summerhouse with tropical palms, equipped in the best botanical manner, a rockery with waterspray, a beehive arranged on humane principles, oval flowerbeds in rectangular grassplots set with eccentric ellipses of scarlet and chrome tulips, blue scillas, crocuses, polyanthus, sweet William, sweet pea, lily of the valley bulbs obtainable from sir James W.

507可以增添一个网球兼手球场，一片灌木丛，用植物学上最佳办法设置一座热带椰子科植物的玻璃凉亭，有喷泉装置的假山石，按照人道的原则设计的蜂窝。在矩形的草坪上布置一座座椭圆形花坛，将深红和淡黄两色的郁金香、蓝色的天蒜、报春花、西樱草、美洲石竹、香豌豆花和欧钤兰都栽培成别致的卵形

Then the system parameters were gain from solving non-linear equation. First, the figure which the circle projecting on the CCD plane by the camera led is proved as an ellipse, and find out the reference point coordinate by calculate the canters of ellipses. Then the system parameters were gained from calculating the formulas in two pictures.

首先证明了参考圆在合适条件下经过相机镜头所成的像是椭圆，通过椭圆的中心求出参考圆的中心，就得到了各个参考点的位置；然后通过各个参考点分别在两个相机坐标系中的位置来确定相机之间位置关系参数，就完成了系统的标定。

Cubic non-uniform trigonometric polynomial curves with multiple shape parameters are presented in this paper. They are C^2-continuous for a non-multiple knot vector and C^3-continuous for a uniform knot vector respectively. The ellipses can also be represented by them.

对于非均匀节点向量给出了一类带多个形状参数的三次三角多项式曲线，这类曲线具有三次多项式B样条的许多重要性质：对非重节点为C^2-连续，对均匀节点则为C^3-连续，能直接表示椭圆。

The inner radius of univalence for some particular domains such as triangles, regular polygons and angle sectors have been obtained. Part estimations of inner radius of univalence for ellipses and rectangles have also been obtained.

对三角形，正多边形，角形区域，双曲线围成的区域的单叶性内径已经得到了精确的数值，对于椭圆，矩形的单叶性内径也得到了部分估计。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。