球地

A preliminary analysis of calibration data shows that the uncertainty of the spectral irradiance measurement in the quartz tungsten halogen lamp and the uncertainty in distance measurement are the major factors of uncertainty in the sphere calibration technique.

初步的定标数据分析显示，石英卤钨灯光谱辐照度测量的相对不确定度和距离测量的不确定度是积分球定标最主要的不确定度来源，可用于紫外波段光谱辐射计的高精度辐射定标，并可以极大地降低定标不确定度。

The input method of multi-scale data and three levels data index are investigated, a new own idea about how to represent multi-scale seamless data is advanced. The viewpoints that seamless GIS is looked on surface of globe reference ellipsoid as spatial information positioning standard and looked on geographic coordinates as reference of spatial data storage are explored, and based on reference ellipsoid surface coordinate, the measurement model of distance, azimuth angle and area are given.(4) The flowchart of data production of seamless GIS is analyzed, on the basis of the program algorithm and the interactive processing of feature adjoining relation, the data production method of seamless GIS is discussed.

研究了无缝GIS多格式、多比例尺空间数据入库的模式，创新性地提出了用数据中间件模式解决GIS多源空间数据无缝集成的新方法，研究了多比例尺数据入库的方法和三级索引机制，并对无缝GIS数据的多尺度表示提出了自己的看法；阐述了无缝GIS以地球椭球面为空间信息定位的参考面、以地理坐标进行空间数据存储的观点，并给出了在椭球坐标系下的距离、方位角和面积度量模型。

Reference to an existing mark on the ground does not constitute marking the position of a ball.

地面上的现有的记号不能用来标记球的位置。

For getting the major characteristic edges without confusions by undesired structures like muscle edges, we integrate a star-like edge detection filter named "Asterisk Filter" with the Canny Edge Detection in the image preprocessing. In addition, we also propose a new contour tracking method named "One-Pixel Rolling Ball Contour Tracking" for getting the boundary information in a binary image which is a link-list data structure. Instead of using a regression curvature estimator, PCA is used for better curvature estimation from a discrete bony contour.

为了从影像上取得骨头特徵边缘，将不重要的肌肉视为杂讯滤除，我们引用一种星形滤波器－Asterisk Filter，搭配Canny边缘检测法，做为这类影像的前处理；另外，为了将骨头的边缘精确地追踪出来，我们提出滚球边界追踪法，来对二值化影像进行边缘追踪，藉此获得边缘的串列资料结构；我们采用以主成分分析(Principle Component Analysis，简称PCA)取代原本以回归方法来计算的曲率，以取得更佳的曲率估测值，其可提高计算之参数的准确性。

A In the space below, draw a vector diagram to show the resultant velocity of the ball.

a 在下面的坐标图上画出球的合速度，并清楚地标明所有速度矢量。

Experimental results validate that our proposed method for calculating the receiving radius can be used to predict some acoustical indexes such as the sound pressure level and the reverberation time in an enclosure.

实验表明，所提出的接收球模型能用来较准确地预测闭空间里的声压级和混响时间等声学参数。

The teacher really read him the Riot Act when he hit a ball through the window and broke it.

在他把球打进窗子并打破了玻璃以后，老师狠狠地训斥了他一顿。

"I'll save the ball," Rivera said with a smile.

"我会留下这颗球" MO面带微笑地这麼著说。

For the robust performance test, the sine or square wave is added on the operating point to be viewed as the external disturbance.

在直流工作点加入弦波或方波当作干扰，铁球皆能稳定地磁浮於空中，展现出系统的强健性能。

He was on a rooftop quietly playing marbles when this happened.

事情 发生的时候，他正在屋顶上专心地玩弹球。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。