scholarly journals Helly's Selection Principle for Functions of Bounded $P$-Variation

2005 ◽  
Vol 35 (2) ◽  
pp. 675-679 ◽  
Author(s):  
John E. Porter
Keyword(s):  
Selection Principle ◽  
Helly's Selection Principle

Singularity Loci, Bifurcated Evolution Routes, and Configuration Transitions of Reconfigurable Legged Mobile Lander from Adjusting, Landing, to Roving

2021 ◽  
pp. 1-11
Author(s):  
Youcheng Han ◽  
Caizhi Zhou ◽  
Weizhong Guo
Keyword(s):  
Rigid Body ◽  
Jacobian Matrix ◽  
Impact Force ◽  
Mutual Authentication ◽  
Selection Principle ◽  
Passive Mechanism ◽  
Grassmann Geometry

Abstract This paper presents the reconfigurable legged mobile lander (ReLML) with its modes from adjusting, landing, to roving. Based on the invented metamorphic variable-axis revolute hinge, the actuated link has three alternative phases of rotating around either of two orthogonal topological axes or locking itself to the base as a rigid body. This property enables the ReLML to switch among three modes and within two driving states (as the adjusting and roving modes are active mechanisms driven by motors, while the landing truss is regarded as a passive mechanism driven by the touchdown impact force exerted on footpad). The unified differential kinematics for the ReLML is established by the screw-based Jacobian modeling, unifying both active and passive operation phases throughout all modes. Afterward, the distributions of workspaces and singularity loci in three modes are discussed for the multi-solution sake, and the selection principle of the practicable solution pattern is proposed to obtain the actual workspace, singularity loci, and configurations. The results stemming from the Jacobian-matrix-based method and the Grassmann-geometry-based method give mutual authentication and match well. Finally, as prospects for promising applications, four bifurcated evolution routes and configuration transitions are figured out and compared.

The GS (genetic selection) Principle

10.2741/3426 ◽  
2009 ◽  
Vol Volume (14) ◽  
pp. 2959 ◽  
Author(s):  
David, L. Abel
Keyword(s):  
Genetic Selection ◽  
Selection Principle

scholarly journals Loss avoidance as selection principle: Evidence from simple stag-hunt games

2005 ◽  
Vol 88 (1) ◽  
pp. 101-107 ◽  
Author(s):  
Ondrej Rydval ◽  
Andreas Ortmann
Keyword(s):  
Selection Principle ◽  
Stag Hunt ◽  
Loss Avoidance
Sign in / Sign up

Export Citation Format

Share Document