Network construction problems with due dates

2015 ◽  
Vol 244 (3) ◽  
pp. 715-729 ◽  
Author(s):  
Igor Averbakh ◽  
Jordi Pereira
Keyword(s):  
Due Dates ◽  
Network Construction

scholarly journals Joint adjustment by CPIII precision trigonometric elevation control network assisted with precision levelling observation

2020 ◽  
Vol 165 ◽  
pp. 03005
Author(s):  
Li Jianzhang
Keyword(s):  
Variance Estimation ◽  
Estimation Method ◽  
Parameter Method ◽  
Control Network ◽  
Network Construction

Using the precision trigonometric elevation instead of the precision levelling to build a CPⅢ elevation control network will greatly increase the speed of CPⅢ control network construction. However, the accuracy of CPIII precision trigonometric elevation control network is still difficult to reach the level of CPⅢ precision levelling network. Based on the existing parameter method, this paper introduces some precision levelling for joint adjustment, and uses Helmert’s variance estimation method to perform strict weight determination. Our experiments show that when the number of precision levelling participating in the joint adjustment exceeds 1/3 of the total number of CPⅢ precision levelling network observations, the accuracy of the CPIII precision trigonometric elevation control network can be effectively improved.

Due dates in MOOCs

2014 ◽  
Author(s):  
Sergiy O. Nesterko ◽  
Daniel Seaton ◽  
Justin Reich ◽  
Joseph McIntyre ◽  
Qiuyi Han ◽  
...  
Keyword(s):  
Due Dates
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