Hidden Markov Models (HMMs). A hidden Markov model models a Markov process, but assumes that there is uncertainty in what state the system is in at any given time. A common metaphor is to think of the HMM as if the Markov Model were a mechanism hidden behind a curtain.
For the scientific journal, see Molecules (journal) . 3D (left and center) and 2D (right) representations of the terpenoid molecule atisane. A molecule (/ËmÉlÉªkjuËl/ from Latin moles mass) is an electrically neutral group of two or more atoms held together by chemical bonds.
ligand. (lÄ«gÉnd), n 1. a molecule, ion, or group bound to the central atom of a chemical compound, such as the oxygen molecule in hemoglobin, which is bound to the central iron atom. 2. an organic molecule attached to a specific site on a surface or to a tracer element.igand. [ligâ²Énd, lÄ«â²gÉnd]. Etymology: L, ligare, to bind. 1 a molecule, ion, or group bound to the central metal atom of a chemical compound, such as the oxygen molecule in oxyhemoglobin, which is bound to the central iron atom.