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  2. True-range multilateration - Wikipedia

    en.wikipedia.org/wiki/True-range_multilateration

    Two slant ranges from two known locations can be used to locate a third point in a two-dimensional Cartesian space (plane), which is a frequently applied technique (e.g., in surveying). Similarly, two spherical ranges can be used to locate a point on a sphere, which is a fundamental concept of the ancient discipline of celestial navigation ...

  3. Ballistic coefficient - Wikipedia

    en.wikipedia.org/wiki/Ballistic_coefficient

    C b is commonly found within commercial publications to be carried out to 3 decimal points as few sporting, small arms projectiles rise to the level of 1.00 for a ballistic coefficient. [ 31 ] When using the Siacci method for different G models, the formula used to compute the trajectories is the same.

  4. Intercept method - Wikipedia

    en.wikipedia.org/wiki/Intercept_method

    It was originally called the azimuth intercept method because the process involves drawing a line which intercepts the azimuth line. This name was shortened to intercept method and the intercept distance was shortened to 'intercept'. The method yields a line of position (LOP) on which the observer is situated. The intersection of two or more ...

  5. Sight reduction - Wikipedia

    en.wikipedia.org/wiki/Sight_reduction

    The first approach of a compact and concise method was published by R. Doniol in 1955 [4] and involved haversines. The altitude is derived from sin ⁡ ( H c ) = n − a ⋅ ( m + n ) {\displaystyle \sin(Hc)=n-a\cdot (m+n)} , in which n = cos ⁡ ( L a t − D e c ) {\displaystyle n=\cos(Lat-Dec)} , m = cos ⁡ ( L a t + D e c ) {\displaystyle ...

  6. OpenLB - Wikipedia

    en.wikipedia.org/wiki/OpenLB

    Automated grid generation [6] is one of the great advantages of OpenLB over other CFD software packages. The main advantages are listed below: Use of geometries in the STL file format or geometrically primitive forms (e.g. ball, cylinder, cone) and their union, intersection and difference

  7. Cross-lagged panel model - Wikipedia

    en.wikipedia.org/wiki/Cross-lagged_panel_model

    The cross-lagged panel model is a type of discrete time structural equation model used to analyze panel data in which two or more variables are repeatedly measured at two or more different time points. This model aims to estimate the directional effects that one variable has on another at different points in time.

  8. Newmark-beta method - Wikipedia

    en.wikipedia.org/wiki/Newmark-beta_method

    The Newmark-beta method is a method of numerical integration used to solve certain differential equations.It is widely used in numerical evaluation of the dynamic response of structures and solids such as in finite element analysis to model dynamic systems.

  9. Logistic map - Wikipedia

    en.wikipedia.org/wiki/Logistic_map

    Here, ρ(x) means that the fraction of points xn that fall in the infinitesimal interval [x,x+dx] when the map is iterated is given by ρ(x) dx. The frequency distribution of the logistic map with r = 4 has high density near both sides of [0, 1] and is least dense at x = 0.5.