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unit vector field造句

"unit vector field"是什么意思   

例句與造句

  1. The dual covector field of the timelike unit vector field in any frame field represents infinitesimal spatial hyperslices.
  2. The Reeb vector field at the Sasakian manifold at unit radius is a unit vector field and tangential to the embedding.
  3. Their theory contains less information than that of Gasperini, instead of a scalar field giving a universal time it contains only a unit vector field which gives the direction of time.
  4. Suppose the strong energy condition holds in some region of our spacetime, and let \ vec { X } be a timelike " geodesic " unit vector field with " vanishing vorticity ", or equivalently, which is hypersurface orthogonal.
  5. In general relativity, Fermi Walker derivatives of the spacelike unit vector fields in a frame field, taken with respect to the timelike unit vector field in the frame field, are used to define non-inertial but nonspinning frames, by stipulating that the Fermi Walker derivatives should vanish.
  6. It's difficult to find unit vector field in a sentence. 用unit vector field造句挺難的
  7. In general relativity, Fermi Walker derivatives of the spacelike unit vector fields in a frame field, taken with respect to the timelike unit vector field in the frame field, are used to define non-inertial but nonspinning frames, by stipulating that the Fermi Walker derivatives should vanish.
  8. TeVeS is constructed from a local Lagrangian ( and hence respects conservation laws ), and employs a unit vector field, a dynamical and non-dynamical scalar field, a free function and a non-Einsteinian metric in order to yield AQUAL in the non-relativistic limit ( low speeds and weak gravity ).
  9. where and are smooth real-valued functions on, is the volume form compatible with the metric, d \ widetilde { V } is the induced volume form on the boundary of, is oriented unit vector field normal to the boundary, and div ( grad " u " ) } } is the Laplacian.
  10. This theory is written in terms of a Lagrangian that contains, in addition to the Einstein Hilbert action for the metric field g _ { \ mu \ nu }, terms pertaining to a unit vector field u ^ \ alpha and two scalar fields \ sigma and \ phi, of which only \ phi is dynamical.
  11. Frame fields always correspond to a family of ideal observers immersed in the given spacetime; the integral curves of the timelike unit vector field are the worldlines of these observers, and at each event along a given worldline, the three spacelike unit vector fields specify the "'spatial triad "'carried by the observer.
  12. Frame fields always correspond to a family of ideal observers immersed in the given spacetime; the integral curves of the timelike unit vector field are the worldlines of these observers, and at each event along a given worldline, the three spacelike unit vector fields specify the "'spatial triad "'carried by the observer.
  13. Computing the kinematic decomposition of the timelike congruence defined by the timelike unit vector field \ scriptstyle \ vec { f } _ 0, we find that the expansion and vorticity again vanishes, and in addition the acceleration vector vanishes, \ scriptstyle \ nabla _ { \ vec { f } _ 0 } \ vec { f } _ 0 \; = \; 0.

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