Investigation on optimising agricultural cultivator openers using quadratic orthogonal rotation regression

Author(s):  
Hongchang Li ◽  
Fang Gao
Keyword(s):  
2021 ◽  
Vol 33 (3) ◽  
pp. 035107
Author(s):  
Obaidullah Khawar ◽  
M. F. Baig ◽  
Sanjeev Sanghi

2016 ◽  
Vol 693 ◽  
pp. 1651-1657 ◽  
Author(s):  
Hai Bo Lin ◽  
Chui Jie Yi ◽  
Zun Min Liu

The wheat precision seeding technology provided an advanced agricultural protection for the high yield of wheat. But the lack of an effective agricultural machine made this technology difficult to apply widely. In this paper a quadruped wheel robot to achieve the wheat precision seeding technology was designed. And experimental study was taken under different operating conditions. Because of multiple effort factors, a quadratic orthogonal rotation combination design method was applied in the experiments, and identifying the main factors by analysis. Then the field test was carried out according to the main factors. The experiment results showed that the qualified rates of seeding exceed 93% in different sowing speed. That reached the agronomic requirements of wheat precision seeding.


Psychometrika ◽  
1970 ◽  
Vol 35 (2) ◽  
pp. 229-235 ◽  
Author(s):  
Robert I. Jennrich
Keyword(s):  

2020 ◽  
Vol 16 (4) ◽  
pp. 72-86
Author(s):  
I.N. Galasyuk ◽  
O.V. Mitina

The article presents a theoretical justification of the concept of Parental Responsiveness (PR) based on the cultural and historical concept, the activity paradigm and the results of an empirical study, the purpose of which is to operationalize the psychological construct of parental responsiveness and build an explanatory model of the dynamic functioning of parental responsiveness. The study involved 55 mothers with children between the ages of 2.4 and 3.3 years, developing within the norm. The method "Evaluation of child-parent interaction (ECPI)", which provides video surveillance, was used. The data was processed using the Observer XT-14 computer program. The Principal component analyses the method with orthogonal rotation Varimax was used to identify generalizing categories that characterize PR and allows describing their variations. As a result, there were 4 categories (scales) that determine the manifestation of responsiveness by the parent: Dominance, Apathy, Sensitivity, and Support. Their stability was shown in the process of parent-child interaction. A profile of parental responsiveness is constructed for each parent, which determines the extend of each scale when interacting with the child. The developed dynamic multidimensional autoregressive model of Parental Responsiveness allows us to evaluate the dynamics of parental behavior and determine the nature of the relationship between scales during the session.


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