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  2. Ankle–brachial pressure index - Wikipedia

    en.wikipedia.org/wiki/Ankle–brachial_pressure...

    The ankle-brachial pressure index (ABPI) or ankle-brachial index (ABI) is the ratio of the blood pressure at the ankle to the blood pressure in the upper arm (brachium). Compared to the arm, lower blood pressure in the leg suggests blocked arteries due to peripheral artery disease (PAD).

  3. Drilling formula sheets - Wikipedia

    en.wikipedia.org/wiki/Drilling_formula_sheets

    Drilling Formula Sheets is a set of Drilling Formulas used commonly by drilling engineers in the onshore and offshore oil drilling industry. They are used as part of a key piece of engineering work called Well Control .

  4. Phred quality score - Wikipedia

    en.wikipedia.org/wiki/Phred_quality_score

    In contrast, instrument manufacturers like ABI continued to adapt their base calling software changes in sequencing chemistry, and have included the ability to create Phred-like quality scores. Therefore, the need to use Phred for base calling of DNA sequencing traces has diminished, and using the manufacturer's current software versions can ...

  5. List of price index formulas - Wikipedia

    en.wikipedia.org/wiki/List_of_price_index_formulas

    The Marshall-Edgeworth index, credited to Marshall (1887) and Edgeworth (1925), [11] is a weighted relative of current period to base period sets of prices. This index uses the arithmetic average of the current and based period quantities for weighting. It is considered a pseudo-superlative formula and is symmetric. [12]

  6. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  7. Calculated Carbon Aromaticity Index - Wikipedia

    en.wikipedia.org/wiki/Calculated_Carbon_Aromati...

    As the name suggests, CCAI is a calculation based on the density and viscosity of a given fuel. The formula is rather complex but in general, the higher the CCAI, the poorer the ignition quality of the fuel is considered to be. Once the CCAI goes above 860, it is an indication that some combustion problems may occur.

  8. Nelson complexity index - Wikipedia

    en.wikipedia.org/wiki/Nelson_complexity_index

    The Nelson complexity index (NCI) is a measure to compare the secondary conversion capacity of a petroleum refinery with the primary distillation capacity. [1] The index provides an easy metric for quantifying and ranking the complexity of various refineries and units. [ 2 ]

  9. Index of biological integrity - Wikipedia

    en.wikipedia.org/wiki/Index_of_biological_integrity

    To quantitatively assess changes in the composition of biologic communities, IBIs are developed to accurately reflect the ecological complexity from statistical analysis. . There is no one universal IBI, and developing metrics that consistently give accurate assessment of the monitored population requires rigorous testing to confirm its validity for a given subje

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