down+gradient

См. также в других словарях:

• Down grade — Grade Grade (gr[=a]d), n. [F. grade, L. gradus step, pace, grade, from gradi to step, go. Cf. {Congress}, {Degree}, {Gradus}.] 1. A step or degree in any series, rank, quality, order; relative position or standing; as, grades of military rank;… …   The Collaborative International Dictionary of English

• Conjugate gradient method — A comparison of the convergence of gradient descent with optimal step size (in green) and conjugate vector (in red) for minimizing a quadratic function associated with a given linear system. Conjugate gradient, assuming exact arithmetic,… …   Wikipedia

• Nonlinear conjugate gradient method — In numerical optimization, the nonlinear conjugate gradient method generalizes the conjugate gradient method to nonlinear optimization. For a quadratic function : The minimum of f is obtained when the gradient is 0: . Whereas linear conjugate… …   Wikipedia

• Geothermal gradient — The geothermal gradient is the rate of increase in temperature per unit depth in the Earth. It varies with location and is typically measured by determining the bottom open hole temperature after borehole drilling. To achieve accuracy the… …   Wikipedia

• Sound speed gradient — In acoustics, the sound speed gradient is the rate of change of the speed of sound with distance, for example with depth in the ocean,cite book title=Navy Supplement to the DOD Dictionary of Military and Associated Terms month=August year=2006… …   Wikipedia

• Combe Down Tunnel — in 2005 Overview Line Somerset and Dorset [Joint] Railway Location …   Wikipedia

• concentration gradient — noun a gradient in concentration of a solute as a function of distance through a solution the movement of a solute down its concentration gradient is called diffusion • Hypernyms: ↑gradient …   Useful english dictionary

• Lynton and Barnstaple Railway — Heritage Railway name = Lynton Barnstaple Railway locale = Exmoor, Devon, England terminus = Lynton Lynmouth linename = Lynton Barnstaple Railway builtby = Promotor: Sir George Newnes, Bart. Engineer: James Szlumper Contractor: James Nuttall… …   Wikipedia

• Minimax eversion — In geometry, minimax eversions are a class of sphere eversions, constructed by using half way models. It is a variational method, and consists of special homotopies (they are shortest paths with respect to Willmore energy); contrast with Thurston …   Wikipedia

• valley — valleylike, adj. /val ee/, n., pl. valleys. 1. an elongated depression between uplands, hills, or mountains, esp. one following the course of a stream. 2. an extensive, more or less flat, and relatively low region drained by a great river system …   Universalium

• bacterial chemotaxis — The response of bacteria to gradients of attractants or repellents. In a gradient of attractant the probability of deviating from a smooth forward path is reduced if the bacterium is moving up gradient. Since the opposite is true if moving down… …   Dictionary of molecular biology