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  2. Microsoft Power BI - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Power_BI

    A dataset can be connected to and get its source data through one or more dataflows. Power BI Datamart Within Power BI, the datamart is a container that combines Power BI Dataflows, datasets, and a type of data mart or data warehouse (in the form of an Azure SQL Database) into the same interface.

  3. Resampling (statistics) - Wikipedia

    en.wikipedia.org/wiki/Resampling_(statistics)

    The best example of the plug-in principle, the bootstrapping method. Bootstrapping is a statistical method for estimating the sampling distribution of an estimator by sampling with replacement from the original sample, most often with the purpose of deriving robust estimates of standard errors and confidence intervals of a population parameter like a mean, median, proportion, odds ratio ...

  4. Python (programming language) - Wikipedia

    en.wikipedia.org/wiki/Python_(programming_language)

    Python uses the * operator for duplicating a string a specified number of times. The @ infix operator is intended to be used by libraries such as NumPy for matrix multiplication. [104] [105] The syntax :=, called the "walrus operator", was introduced in Python 3.8. It assigns values to variables as part of a larger expression. [106]

  5. Concentrated solar power - Wikipedia

    en.wikipedia.org/wiki/Concentrated_solar_power

    A solar power tower consists of an array of dual-axis tracking reflectors that concentrate sunlight on a central receiver atop a tower; the receiver contains a heat-transfer fluid, which can consist of water-steam or molten salt. Optically a solar power tower is the same as a circular Fresnel reflector.

  6. 2015 in aviation - Wikipedia

    en.wikipedia.org/wiki/2015_in_aviation

    A U.S. Marine Corps MV-22 Osprey carrying 21 U.S. Marines and one United States Navy hospital corpsman crashes on landing at Bellows Air Force Station in Waimanalo, Hawaii, and catches fire, killing one Marine and injuring the other 21 people aboard, all of whom are sent to hospitals. [216] 18 May

  7. Perfect digital invariant - Wikipedia

    en.wikipedia.org/wiki/Perfect_digital_invariant

    There are a finite number of natural numbers less than +, so the number is guaranteed to reach a periodic point or a fixed point less than +, making it a preperiodic point. Numbers in base b > p {\displaystyle b>p} lead to fixed or periodic points of numbers n ≤ ( p − 2 ) p + p ( b − 1 ) p {\displaystyle n\leq (p-2)^{p}+p(b-1)^{p}} .

  8. Radar in World War II - Wikipedia

    en.wikipedia.org/wiki/Radar_in_World_War_II

    The system, Japan's first full radar, was designated Mark 1 Model 1. (This type of designation is shortened herein to the numbers only; e.g., Type 11.) The system operated at 3.0 m (100 MHz) with a peak-power of 40 kW. Dipole arrays with mat-type reflectors were used in separate antennas for transmitting and receiving.

  9. Three-valued logic - Wikipedia

    en.wikipedia.org/wiki/Three-valued_logic

    in the redundant binary representation, each digit can have a value of −1, 0, 0/1 (the value 0/1 has two different representations); in the ternary numeral system, each digit is a trit (trinary digit) having a value of: 0, 1, or 2;

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    power bi replace null values pandas array with one number in line to find