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.
A molecule is two or more ATOMS (composed of protons (+) and neutrons (0) to make the nucleus, and orbited by electrons (-) bonded together. They may be the same type of atom (which means that the molecule is an ELEMENT), or they may be different types of atoms (which means that the molecule is a COMPOUND).