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The backward differentiation formula (BDF) is a family of implicit methods for the numerical integration of ordinary differential equations.They are linear multistep methods that, for a given function and time, approximate the derivative of that function using information from already computed time points, thereby increasing the accuracy of the approximation.
BDF or Bdf may refer to: Businesses and organisations. Ballroom Dancers' Federation, a British organization for competitive ballroom dancers;
Version 2.2 added support for non-Western writing. For example, glyphs in a BDF 2.2 font definition can specify rendering from top-to-bottom rather than simply left-to-right. A BDF font file contains three sections: a global section that applies to all glyphs in a font; a section with a separate entry for each glyph; and; the ENDFONT statement.
The BDF methods are implicit methods with = = = and the other coefficients chosen such that the method attains order s (the maximum possible). These methods are especially used for the solution of stiff differential equations .
BDF – Barbados Defence Force (Barbados) BDU – Battle Dress Uniform (U.S. military) Be – Beriev (Russian) BEA – Budget Execution Authority (U.S. Navy)
BDF (Bidirectional distribution function) is collectively defined by BRDF and BTDF. BSSRDF ( Bidirectional scattering-surface reflectance distribution function or Bidirectional surface scattering RDF ) [ 4 ] [ 5 ] describes the relation between outgoing radiance and the incident flux, including the phenomena like subsurface scattering (SSS).
Here are 125 cute, sexy, and romantic nicknames for your boyfriend, fiancé, baby daddy, FWB—basically anyone you're getting romantic with.
Portable Document Format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating systems.