The paper considers the power-system state estimation in a

rectangular coordinate system.

The longitude and latitude errors are firstly transformed from geodetic coordinate system to the ECEF (Earth Centered, Earth Fixed) coordinate system according to the WGS-84 reference ellipsoid, and then to the site-centric coordinate system which is space

rectangular coordinate system and the error unit is in meters.

Methods: On the lateral surfaces of 40 adult skulls (19 male skulls and 21 female skulls), a

rectangular coordinate system was defined to measure the x and y coordinates of two points: the ASTS and the squamosal-parietomastoid suture junction (SP).

In order to calculate the scope of tunnel collapse, a plane

rectangular coordinate system was established.

All displacements of a link and measuring devices were performed in a

rectangular coordinate system (SC) XYZ, where axis X coincides with the direction of the airflow speed vector u, Y is a vertical axis, Z is an axis component of the right-handed SC.

For ease of calculation, latitude and longitude as spherical coordinate can be transformed into

rectangular coordinate by the algorithm [17].

For the often experienced complex-valued microwave quantities, the associated measurement uncertainties have been strongly recommended to be evaluated in

rectangular coordinate [10], following the internationally recommended guidelines [5].

Therefore, the uncertainty evaluated in a

rectangular coordinate needs to be transformed into the desired polar coordinate, since the direct evaluation of measurement uncertainty for the magnitude ([absolute value of S]) is suggested to be avoided as it is a biased estimator especially when the magnitude is small [7].

e] [delta](z')f(x') in the

rectangular coordinate system since the field [[?

Calculations were done in a local

rectangular coordinate system whose origin is at the point [phi] = 51[degrees]6', [lambda] = 16[degrees]30'.

uses algorithms based on nonlinear interpolation weights to generate 3D patterns from vertical and horizontal pattern data, in either spherical or

rectangular coordinate systems.

In summary, a

rectangular coordinate system and the following velocity profile can be used for analysis of single-screw extrusion.