principal axis

(redirected from Principal axes)
Also found in: Dictionary, Thesaurus, Encyclopedia.

principal axis

In optics, a line that passes through the optical center or nodal point of a lens perpendicular to the surface of the lens.

See also: axis

Mentioned in ?

References in periodicals archive ?

This condition implies that the attitude motion in three dimensions is controlled by applying nonlinear control methods utilizing nonholonomic constraint of a FFRB unless the inertial moments of principal axes I and II are equal.

Consideration of Three-Dimensional Attitude and Position Control for a Free-Floating Rigid Body Using Three Thrusters

Again, it has been demonstrated that the presented method has a potential to overcome a critical hurdle of not-cutting principal axes in defected virtual organ of injured side.

Extracting Cross-Sectional Clinical Images Based on Their Principal Axes of Inertia

Based on absolute and central moments of the obtained 3D bone volumes, the proposed method takes the principal axes as feature descriptors and computes them starting from the inertial matrix.

Multitemporal Volume Registration for the Analysis of Rheumatoid Arthritis Evolution in the Wrist

Once the principal components are obtained, [[lambda].sub.1], along with the principal axes, [[bar.v].sub.i], they together explain the variation of the data, which are ordered as a Pareto diagram, selecting exclusively that set of components p that explain at least 80% of the variation in the data.

An Approach to Integrating Tactical Decision-Making in Industrial Maintenance Balance Scorecards Using Principal Components Analysis and Machine Learning

From (10)~(12), the corresponding component formulation of (17) relative to the Eulerian principal axes is

A Natural Generalization of Linear Isotropic Relations with Seth-Hill Strain Tensors to Transversely Isotropic Materials at Finite Strains

A big advantage of acoustic birefringence is that no reference state is required, but we must pay attention to the principal axes of the materials and the principal axes of the applied stresses.

Residual stress determination with acoustic birefringence in slightly anisotropic polymers

76.1% of this is summarized in the first five principal axes (Figure 2).

Un analisis estadistico de la heterogeneidad en los mercados laborales y las tasas de desempleo en Colombia

There is one longitudinal wave and two transverse waves in each of the principal axes, which are related to material density and wave velocity by [C.sub.ii] = [v.sup.2.sub.ii][rho]; the density of the culm is obtained by volumetric methods [19, 20].

Elastic module study of the radial section of Guadua angustifolia Kunth variety Bicolor

In those classes the principal axes of the natural and electrooptic birefringence coincide.

Growth and characterization of single crystalline [Bi.sub.4][Ge.sub.3][O.sub.12] fibers for electrooptic high voltage sensors

Correspondence analysis determines the principal axes of inertia and for each axis the corresponding eigenvalue, which is the same as the inertia of the cloud in the direction of the axis.

The correspondence analysis applied on the agriculture sector of European Union countries using statistical analysis system

We consider the principal axes of the outer clad to coincide with the optical axis along the z-direction, and the extraordinary principal axis attains a radial orientation.

Transmission through twisted clad liquid crystal optical fibers

The principal axes are eigenvectors of the inertia tensor matrix of cluster markers.

The relationship between performance and trunk movement during change of direction