推导出了用多极场空间谐波函数表示的磁矢位的通项表达式。
General expressions of the magnetic vector potential for multipole fields are derived.
腰椎间关节的方位自上而下,由近矢状位逐渐过渡为近冠状位;
The orientation of the lumbar zygapophyseal joints changed gradually from about sagittal plane in upper segment to about coronal in lower.
目的:为冠状及矢状位断层影像解剖研究探讨新的方法。
Objective: To investigate a new method for the study on coronal and sagittal sectional-imaging anatomy.
You can actually take derivatives of a vector with time.
你可以直接求位矢对时间的导数
More position vectors? I want to look at that.
例如其它的位矢,我想来看一下
That's the analog of the position vector.
那是和位矢相似的情况
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