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The Failures In Time (FIT) rate of a device is the number of failures that can be expected in one billion (10 9) device-hours of operation. [14] (E.g. 1000 devices for 1 million hours, or 1 million devices for 1000 hours each, or some other combination.) This term is used particularly by the semiconductor industry.
The number e is a mathematical constant approximately equal to 2.71828 that can be characterized in many ways. It is the base of the natural logarithm function. It is the limit of (+ /) as n tends to infinity, an expression that arises in the computation of compound interest.
Khelif was born in Aïn Sidi Ali, Laghouat Province. [11] [12] When she was two months old, her family moved to Biban Mesbah, a rural village in Tiaret Province, where she would grow up.
Salah Mohsen Mohamed Shalaby (Arabic: صلاح محسن محمد شلبي; born 1 September 1998) is an Egyptian professional footballer who plays as a forward for the Egypt national team and the Egyptian Premier League side Al Masry.
An early electromechanical programmable computer, the Z3, included floating-point arithmetic (replica on display at Deutsches Museum in Munich).. In computing, floating-point arithmetic (FP) is arithmetic that represents subsets of real numbers using an integer with a fixed precision, called the significand, scaled by an integer exponent of a fixed base.
Graphs of y = b x for various bases b: base 10, base e, base 2, base 1 / 2 . Each curve passes through the point (0, 1) because any nonzero number raised to the power of 0 is 1. At x = 1, the value of y equals the base because any number raised to the power of 1 is the number itself.
An imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i 2 = −1. [1] [2] The square of an imaginary number bi is −b 2. For example, 5i is an imaginary number, and its square is −25. The number zero is considered to be both real and imaginary. [3]
Flores, B. E. (1986) "A pragmatic view of accuracy measurement in forecasting", Omega (Oxford), 14(2), 93–98. doi : 10.1016/0305-0483(86)90013-7 Tofallis, C (2015) "A Better Measure of Relative Prediction Accuracy for Model Selection and Model Estimation", Journal of the Operational Research Society, 66(8),1352-1362.