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Luchman, J.N.; CHAIDFOREST: Stata module to conduct random forest ensemble classification based on chi-square automated interaction detection (CHAID) as base learner, Available for free download, or type within Stata: ssc install chaidforest. IBM SPSS Decision Trees grows exhaustive CHAID trees as well as a few other types of trees such as CART.
In materials science, a metal matrix composite (MMC) is a composite material with fibers or particles dispersed in a metallic matrix, such as copper, aluminum, or steel.The secondary phase is typically a ceramic (such as alumina or silicon carbide) or another metal (such as steel [1]).
If N is also a ring (and hence an R-algebra), then this is the presentation of the N-module ; that is, the presentation extends under base extension. For left-exact functors , there is for example Proposition — Let F , G be left-exact contravariant functors from the category of modules over a commutative ring R to abelian groups and θ a ...
Cluster analysis or clustering is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some specific sense defined by the analyst) to each other than to those in other groups (clusters).
e is the elementary charge (approximately 1.6 × 10 −19 C) B is the magnetic field (in teslas) m e is the electron mass (approximately 9.1 × 10 −31 kg). The Hall parameter value increases with the magnetic field strength. Physically, the trajectories of electrons are curved by the Lorentz force.
The first practical version of such devices was the Audion triode, invented in 1906 by Lee De Forest, [8] [9] [10] which led to the first amplifiers around 1912. [11] Since the only previous device which was widely used to strengthen a signal was the relay used in telegraph systems, the amplifying vacuum tube was first called an electron relay .
More precisely: an n-bit reversible gate is a bijective mapping f from the set {0,1} n of n-bit data onto itself. An example of such a reversible gate f is a mapping that applies a fixed permutation to its inputs. For reasons of practical engineering, one typically studies gates only for small values of n, e.g. n=1, n=2 or n=3. These gates can ...
Possibly the simplest application of multi-compartment model is in the single-cell concentration monitoring (see the figure above). If the volume of a cell is V, the mass of solute is q, the input is u(t) and the secretion of the solution is proportional to the density of it within the cell, then the concentration of the solution C within the cell over time is given by