mlgbd，谁懂spherical coordinates进来一下！

[大漠张三]

什么时侯用spherical coordinates？什么时侯用cylindrical coordinates？我怎么觉得都tmd差不多啊！

星期五考，急

 

[难波万]

calculus? 不懂不懂~~祝好运`~

 

[大漠张三]

最初由 难波万 发布
calculus? 不懂不懂~~祝好运`~

好运啥，你不也得考


你linear algebra多少分？平均分又70多，疯了

 

[难波万]

嘿嘿~~我下周二考~~

linear algebra~~刚刚及格而已~~唉~~现如今日子不好过啊~~

 

[刚睡醒]

最初由 大漠张三 发布
什么时侯用spherical coordinates？什么时侯用cylindrical coordinates？我怎么觉得都tmd差不多啊！

星期五考，急

THEY ARE DIFFERENT

SPHERICAL COORDINATES HAVE
ONE RADIAL PARAMETER (R)
TWO INDEPENDENT ANGULAR PARAMETERS (THETA1,THETA2)
SO THAT ANY POINT,LINE,ETC IN 3D SPACE CAN BE DESCRIBED FROM A SINGLE REFERENCE POINT

CYLINDRICAL COORDINATES HAVE
ONE RADIAL PARAMETER (R)
ONE ANGULAR PARAMETER (THETA)
THE ABOVE TWO PARAMETERS ARE PARAMETERS FOR POLAR COORDINATES, WHICH DESCRIBES POINT,LINE,ETC IN PLANE

ONE LINEAR PARAMETER (Z) <= PERPENDICULAR TO THE POLAR COORDINATE PLANES, BY USING THIS PARAMETER, POINT,LINE,ETC CAN BE DESCRIBED IN 3D SPACE INSTEAD OF A PLANE

 

[大漠张三]

i know they are different, 我在问什么时侯用polar或者spherical

 

[刚睡醒]

最初由 大漠张三 发布
i know they are different, 我在问什么时侯用polar或者spherical

DEPEND ON THE PROBLEM. WHICH EVER IS EASIER TO DESCRIBE THE PROBLEM, THEN JUST USE THAT ONE

POLAR IS FOR 2D
SPHERICAL IS FOR 3D
OR IF U FIND FAMILIAR WITH CARTESIAN X-Y-Z COORDINATE, THEN JUST USE THAT ONE, THEY R ALL FOR DESCRIBING STUFFS, NO BIG DEAL.

 

[暖暖的午後]

好好学阿。。。
不然下个term E&M死惨

 

[1784]

EM is easy ... all about integration

 

[大漠张三]

最初由 1784 发布
EM is easy ... all about integration

might be easy for u, but ing hard for me

 

[大漠张三]

最初由 暖暖的午後 发布
好好学阿。。。
不然下个term E&M死惨

郁闷死了。。。

现在我们所以midterm的平均分都70以上。。。。怎么搞的？它们会把final 搞的很难吗？

 

[Consciousness]

spherical coordinates适用于球体，cylindrical coordinates适用于圆柱体

 

[1784]

cylindrical coordinates is also good for ring(loop line) and circular surface

 

[可惜他有女朋友]

calculus高中没有学么？