In animals there exist three types of autophagy: microautophagy, macroautophagy, and chaperone-mediated autophagy, while in plants there are additional forms of autophagy including but not necessarily limited to mega-autophagy, involving collapse of the tonoplast, and internal degradation of chloroplasts [ 11].
There exist two types of multiuser coordination: spectrum level coordination[4 12] and signal level coordination[13 16].
Typically there exist two types of structures on the stoichiometric mixture-fraction isosurface: flame patches and extinction holes.
There exist two types of cooperative communication pattern: amplify-and-forward (AF) and decode-and-forward (DF) [2].
There exist two types of feature-based methods in the literature: filter-based and BA-based methods.
It is shown that, in pure materials and alloys, there exist two types of solutions with two convex and with two concave parabolas, respectively.
It is found that there exist two types of limit cycle behaviors rather than only one type in a boost converter.
There exist two types of MFD: one has at most a linear convergence rate and the other has a superlinear convergence rate.
There exist two types of commonly studied stochastic elliptic models in literature: (I) −∇ · (a x, ω)∇u x, ω)) = f(x) and (II) -∇·(a x,ω)♢∇u x,ω))="f(x), where ω indicates randomness, ♢ the Wick product, and a x, ω) is a positive random process.
To date, there exist two types of xyloglucan detecting probes, polyclonal and monoclonal antibodies [ 12, 13], and xyloglucan-binding modules (XGBM) created by CBM engineering [ 14].
