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Let Γ be a smooth compact convex planar curve with arc length dm and let dσ=ψ dm where ψ is a cutoff function.
      
The circulant digraphDCn(S) is a directed graph with vertex setZn and arc set {(i,i+s): i ∈ Zn, s ∈ S}.
      
ThenCn(S) is arc-transitive if and only if Xoacts transitively onS.
      
A packing of the complete directed symmetric graph DKv with m-circuits, denoted by (v,m)-DCP, is defined to be a family of arc-disjoint m-circuits of DKv such that any one arc of DKv occurs in at most one m-circuit.
      
It is proved that there is no chaotic group actions on any topological space with free arc.
      
Classification of primitive (J1, 2)-arc transitive graphs
      
Is this the only one for J1? In this paper all primitive (J1, 2)-arc transitive graphs Γ are given and that AutΓ?J1 is proved.
      
Employing Arc/Info GIS, the tree species diversity and rarity, disturbance degree, protection of channel system, and classification management in the Maoershan National Forest Park were described, and used as the input factors of NN.
      
An automated arc spray tooling system for rapid die-making of large-sized automobile body panels
      
By using the wrist and the control method, an industrial robot with five degrees of freedom for rapid tooling using metal arc spraying and electric brush plating techniques was developed.
      
Without the need of any manual programming, the metal arc spraying and brush plating (if necessary) processes can be performed automatically and efficiently after receiving the 3D CAD data of the pattern.
      
Dilution rate and microstructure of TIG arc Ni-Al powder surfacing layer
      
Surfacing beads are prepared by a direct current tungsten inert gas arc nickel-aluminum (Ni-Al) powder surfacing process.
      
A novel soft-switching twin arc pulse MAG welding inverter
      
The high-speed double wire pulse metal-gas arc (MAG) welding process possesses advantages of automation and high efficiency and quality.
      
After studied the effect of compelled arc constriction on weld penetration of AC welding, it is believed that the constriction of the whole arc root is not the main mechanism that flux AF305 dramatically improves weld penetration.
      
The separate distribution of slag on the weld pool during welding and the great constriction of arc spots were confirmed by TIG welding with helium shielding gas.
      
During welding, the separate distribution of slag on the weld pool results in the great constriction of arc spots, an increase in arc spot force, and an increase in Lorentz force within the arc and weld pool.
      
The difference between the critical temperature and the pairing temperature is presented, and the Fermi arc, the d-wave symmetry and the poor conductivity, etc., are discussed.
      
Numerical analysis of weld pool geometry in globular-transfer gas metal arc welding
      
 

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