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  2. Archimedes number - Wikipedia

    en.wikipedia.org/wiki/Archimedes_number

    The Archimedes number is applied often in the engineering of packed beds, which are very common in the chemical processing industry. [3] A packed bed reactor, which is similar to the ideal plug flow reactor model, involves packing a tubular reactor with a solid catalyst, then passing incompressible or compressible fluids through the solid bed. [3]

  3. Formula editor - Wikipedia

    en.wikipedia.org/wiki/Formula_editor

    Formula Sheet Equation Editor [permanent dead link ‍] Yes Yes No Yes Yes Yes No No Online LaTeX equation editor with real-time .png, .pdf, and .tex output. Customizable resolution, font, and color. One click copy to MS Word 2007+ using MathML. Formulator MathML Weaver: Yes Yes No No Yes Yes No No Dual-licensing (Open source and commercial).

  4. Absolute risk - Wikipedia

    en.wikipedia.org/wiki/Absolute_risk

    Absolute risk (or AR) is the probability or chance of an event. It is usually used for the number of events (such as a disease) that occurred in a group, divided by the number of people in that group. [1] Absolute risk is one of the most understandable ways of communicating health risks to the general public. [2]

  5. Drug accumulation ratio - Wikipedia

    en.wikipedia.org/wiki/Drug_accumulation_ratio

    The accumulation ratio of a specific drug in humans is determined by clinical studies. According to a 2013 analysis, such studies are typically done with 10 to 20 subjects who are given one single dose followed by a washout phase of seven days , and then seven to 14 repeated doses to reach steady state conditions. Blood samples are drawn 11 ...

  6. Day count convention - Wikipedia

    en.wikipedia.org/wiki/Day_count_convention

    This convention accounts for days in the period based on the portion in a leap year and the portion in a non-leap year. The days in the numerators are calculated on a Julian day difference basis. In this convention the first day of the period is included and the last day is excluded. The CouponFactor uses the same formula, replacing Date2 by Date3.

  7. Ratio estimator - Wikipedia

    en.wikipedia.org/wiki/Ratio_estimator

    The ratio estimator is a statistical estimator for the ratio of means of two random variables. Ratio estimates are biased and corrections must be made when they are used in experimental or survey work. The ratio estimates are asymmetrical and symmetrical tests such as the t test should not be used to generate confidence intervals.

  8. Debtor collection period - Wikipedia

    en.wikipedia.org/wiki/Debtor_collection_period

    The average collection period (ACP) is the time taken by businesses to convert their accounts receivable (AR) to cash. Credit sales are all sales made on credit (i.e. excluding cash sales). A long debtors collection period is an indication of slow or late payments by debtors.

  9. Autoregressive moving-average model - Wikipedia

    en.wikipedia.org/wiki/Autoregressive_moving...

    For example, processes in the AR(1) model with | | are not stationary because the root of = lies within the unit circle. [3] The augmented Dickey–Fuller test assesses the stability of IMF and trend components. For stationary time series, the ARMA model is used, while for non-stationary series, LSTM models are used to derive abstract features.