Both of these variables are combined to a process a single index of hypnotic level, displayed as a

dimensionless number on a continuous scale of 0-100 in the BIS monitor.

where [Q.sub.VI] is the smoke-dust emission ([m.sup.2]/s); [q.sub.VI] is the baseline smoke-dust emission ([m.sub.2]/(veh x km)); [f.sub.a(VI)] is the vehicle condition coefficient (

dimensionless number); [f.sub.d] is the coefficient of vehicle density (

dimensionless number); [f.sub.h(VI)] is the coefficient of altitude (

dimensionless number); [f.sub.iv(VI)] is the coefficient of longitudinal slope and vehicle speed (

dimensionless number); L is the tunnel length (m); [f.sub.m(VI)] is the diesel vehicle type coefficient (

dimensionless number); [n.sub.D] is the diesel vehicle type number (

dimensionless number); and [N.sub.m] is the traffic quantity of the corresponding type (veh/h).

A

dimensionless number (CLD/H) called shape factor, which is defined as the ratio of triple line diameter (CLD) to the height of C[O.sub.2] bubble at apex (H), has a good agreement with contact angle changes during C[O.sub.2] dissolution when slip-stick stages are observed [30, 31].

The values of the

dimensionless number K for each test are illustrated on the graphical representations (Figs.

Later on, it has been observed during the analysis that the first

dimensionless number [[PI].sub.1] is the Reynolds number measured during flutter and then called flutter Reynolds number.

We define these properties in terms of the coefficient of friction (COF, often denoted as g), a

dimensionless number, which describes the ratio of the force of friction between two bodies and the force pressing them together.

This

dimensionless number depends directly on the mass transfer coefficient, it is intended that this value is as high as possible on any system to facilitate the exchange of molecules between the two phases, this factor depends on the Reynolds number, which characterizes the movement of a fluid, in liquid chromatography is intended that the fluid passing through the column is in laminar regime, as consequence the molecular transfer between the phases is facilitated.

The score is generally reported as the H-index, a

dimensionless number, and is a count of citations derived by a certain formula.

The Rayleigh number for a fluid is a

dimensionless number associated with the heat transfer within the fluid.

The search for mathematical expression for this

dimensionless number motivated many serious scientists.

(iii) Strouhal (St) number is the ratio of oscillatory inertial forces/convective inertial forces and is a

dimensionless number describing oscillating flow mechanisms.

[13], defined a

dimensionless number, called Bejan number, as