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An ε-rule is a rule of the form A → ε, where A is not S 0, the grammar's start symbol. To eliminate all rules of this form, first determine the set of all nonterminals that derive ε. Hopcroft and Ullman (1979) call such nonterminals nullable, and compute them as follows: If a rule A → ε exists, then A is nullable. If a rule A → X 1...
Chvorinov's rule is a physical relationship that relates the solidification time for a simple casting to the volume and surface area of the casting. It was first expressed by Czech engineer Nicolas Chvorinov in 1940.
In fluid dynamics, the Reynolds number ( Re) is a dimensionless quantity that helps predict fluid flow patterns in different situations by measuring the ratio between inertial and viscous forces. [ 2] At low Reynolds numbers, flows tend to be dominated by laminar (sheet-like) flow, while at high Reynolds numbers, flows tend to be turbulent.
Take a look below. 1) More crunches equal a flatter tummy. The truth is that everyone has ab muscles that stay hidden underneath a thick layer of fat. The key is to focus on burning fat. 2 ...
Stanton number. The Stanton number, St, is a dimensionless number that measures the ratio of heat transferred into a fluid to the thermal capacity of fluid. The Stanton number is named after Thomas Stanton (engineer) (1865–1931). [ 1][ 2]: 476 It is used to characterize heat transfer in forced convection flows.
Bending of plates, or plate bending, refers to the deflection of a plate perpendicular to the plane of the plate under the action of external forces and moments. The amount of deflection can be determined by solving the differential equations of an appropriate plate theory. The stresses in the plate can be calculated from these deflections.
View factor. In radiative heat transfer, a view factor, , is the proportion of the radiation which leaves surface that strikes surface . In a complex 'scene' there can be any number of different objects, which can be divided in turn into even more surfaces and surface segments. View factors are also sometimes known as configuration factors ...
Eating a balanced, nutrient-dense diet is key to a flat stomach, but knowing specific items that may affect this can help you feel more prepared in your goals.The following list of "worst foods ...