scholarly journals Note on the space group selection rule for closed strings on orbifolds

2019 ◽  
Vol 2019 (1) ◽  
Author(s):  
Saúl Ramos-Sánchez ◽  
Patrick K. S. Vaudrevange
Keyword(s):  
Group Selection ◽  
Selection Rule ◽  
Space Group

scholarly journals Input Rationality Analysis of Three Degree of freedom Parallel Mechanism with Limbs of Embedding Structures

2019 ◽  
Vol 10 (2) ◽  
pp. 343-353
Author(s):  
Gaowei Yang ◽  
Jianjun Zhang ◽  
Weimin Li ◽  
Kaicheng Qi
Keyword(s):  
Parallel Mechanism ◽  
Group Selection ◽  
Degrees Of Freedom ◽  
Selection Rule ◽  
Direct Application ◽  
Input Selection ◽  
Selection Theory ◽  
Coupling Relationship ◽  
Three Degree Of Freedom ◽  
Three Degrees Of Freedom

Abstract. Three degrees of freedom (3-DoF) parallel mechanism (PM) with limbs of embedding structures is a kind of PM with a coupling relationship between limbs. In order to obtain a more desirable motion, the analysis of its actuated pairs shall be conducted. However, the fact that the existence of limbs coupling results in non-unique limb group, this mechanism has multiple limb groups. In this regard, the traditional input selection theory is not suitable for direct application in the input rationality analysis. Aiming to avoid this, a general extended input selection theory and limb group selection rule are proposed. The former tackles the traditional input selection theory which is not suitable for analyzing the input of PM with limbs of embedding structures since it does not take the influence of group into consideration, whereas the latter makes the calculation of the former easier. Based on the extended input selection theory and the limb group selection rule, the input and configuration of the 3-DoF PM with limbs of embedding structures are improved.

On Space Group Selection Rules

1969 ◽  
Vol 33 (1) ◽  
pp. 217-223 ◽  
Author(s):  
H. W. Streitwolf
Keyword(s):  
Group Selection ◽  
Selection Rules ◽  
Space Group

scholarly journals Space-Group Selection Rules for Magnetic Crystals

1967 ◽  
Vol 38 (6) ◽  
pp. 1252-1269 ◽  
Author(s):  
Arthur P. Cracknell
Keyword(s):  
Group Selection ◽  
Selection Rules ◽  
Space Group

scholarly journals Space Group Selection Rules for Magnetic Crystals

1970 ◽  
Vol 43 (6) ◽  
pp. 1613-1614
Author(s):  
Arthur P. Cracknell ◽  
Brynmor L. Davies
Keyword(s):  
Group Selection ◽  
Selection Rules ◽  
Space Group

Space group selection for crystal structure prediction of solvates

CrystEngComm ◽  
2007 ◽  
Vol 9 (7) ◽  
pp. 556 ◽  
Author(s):  
Aurora J. Cruz Cabeza ◽  
Elna Pidcock ◽  
Graeme M. Day ◽  
W. D. Sam Motherwell ◽  
William Jones
Keyword(s):  
Crystal Structure ◽  
Structure Prediction ◽  
Group Selection ◽  
Crystal Structure Prediction ◽  
Space Group ◽  
Selection For
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