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  2. Objective stress rate - Wikipedia

    en.wikipedia.org/wiki/Objective_stress_rate

    For a small enough load step, the material deformation can be characterized by the small (or linearized) strain increment tensor [11] = [+ ()] = (, +,) where is the displacement increment of the continuum points. The time derivative = ˙ = [+ ()] ˙ = (, +,) is the strain rate tensor (also called the velocity strain) and = ˙ is the material ...

  3. Crack growth equation - Wikipedia

    en.wikipedia.org/wiki/Crack_growth_equation

    Figure 1 shows a typical plot of the rate of crack growth as a function of the alternating stress intensity or crack tip driving force plotted on log scales. The crack growth rate behaviour with respect to the alternating stress intensity can be explained in different regimes (see, figure 1) as follows

  4. Busicom - Wikipedia

    en.wikipedia.org/wiki/Busicom

    One of their last mechanical calculators is the HL-21, an Odhner type machine. [5] Their first calculator with a microprocessor is the Busicom 141-PF. Their entry based calculators, the Busicom LE-120A (Handy-LE) and LE-120S (Handy), [6] were the first to fit in a pocket and also the first calculators to use an LED display.

  5. Casio V.P.A.M. calculators - Wikipedia

    en.wikipedia.org/wiki/Casio_V.P.A.M._calculators

    Casio V.P.A.M. calculators are scientific calculators made by Casio which use Casio's Visually Perfect Algebraic Method (V.P.A.M.), Natural Display or Natural V.P.A.M. input methods. V.P.A.M. is an infix system for entering mathematical expressions, used by Casio in most of its current scientific calculators.

  6. Discrete calculus - Wikipedia

    en.wikipedia.org/wiki/Discrete_calculus

    Discrete calculus or the calculus of discrete functions, is the mathematical study of incremental change, in the same way that geometry is the study of shape and algebra is the study of generalizations of arithmetic operations.

  7. Time complexity - Wikipedia

    en.wikipedia.org/wiki/Time_complexity

    An algorithm is said to be exponential time, if T(n) is upper bounded by 2 poly(n), where poly(n) is some polynomial in n. More formally, an algorithm is exponential time if T(n) is bounded by O(2 n k) for some constant k. Problems which admit exponential time algorithms on a deterministic Turing machine form the complexity class known as EXP.

  8. Capital recovery factor - Wikipedia

    en.wikipedia.org/wiki/Capital_recovery_factor

    With an interest rate of i = 10%, and n = 10 years, the CRF = 0.163. This means that a loan of $1,000 at 10% interest will be paid back with 10 annual payments of $163. [2] Another reading that can be obtained is that the net present value of 10 annual payments of $163 at 10% discount rate is $1,000. [2]

  9. Mean annual increment - Wikipedia

    en.wikipedia.org/wiki/Mean_annual_increment

    Throughout this, the MAI always remains positive. MAI differs from periodic annual increment (PAI) in that the PAI is the growth for one specific year or any other specified length of time. MAI vs PAI. The point where the MAI and PAI meet is at the point of maximum MAI and is typically referred to as the biologically optimal rotation age. This ...