positive quadrant
... 正象限相关系数：PCC 正象限：positive quadrant 正向运动：positive movement ...
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正象限相依的 positively quadrant dependent
象限修正球 quadrantal sphere
圆弧或者圆的象限正点 QUA
数字正射影像象限图 digital orthophoto quarter quadrangle
圆弧或者圆的限象正点 TAN
象限修正 quadrantal correction
方弧或者圆的限象正点 TAN
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考虑标准二维布朗运动在正象限锥形区域的占有时，得到其一阶矩和二阶矩的表达式。
The occupation time in a cone in the positive quadrant for a standard two-dimensional Brownian motion is studied, and its first and second moments are given explicitly.
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