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2 天前 · ISO 3166-1 ( Codes for the representation of names of countries and their subdivisions – Part 1: Country codes) is a standard defining codes for the names of countries, dependent territories, and special areas of geographical interest. It is the first part of the ISO 3166 standard published by the International Organization for Standardization .
4 天前 · A map of Europe, with ISO 3166-1 alpha-2 codes in place of the full names of countries and other territories. 'Exceptional reservations' codes CQ, EU and UK are not shown. ISO 3166-1 alpha-2 codes are two-letter country codes defined in ISO 3166-1, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), to represent countries, dependent territories ...
3 天前 · A plot of normal distribution (or bell-shaped curve) where each band has a width of 1 standard deviation – See also: 68–95–99.7 rule. Cumulative probability of a normal distribution with expected value 0 and standard deviation 1 In statistics, the standard deviation is a measure of the amount of variation of a random variable expected about its mean.
1 天前 · China's was the only major world economy to experience GDP growth in 2020, when its GDP increased by 2.3%. [101] However, it posted one of its worst economic performances in decades because of COVID-19 in 2022. [102] In 2023, IMF predicted China to continue being one of the fastest growing major economies. [103]
2 天前 · List of file signatures. This is a list of file signatures, data used to identify or verify the content of a file. Such signatures are also known as magic numbers or Magic Bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.
4 天前 · Windows 11 is the latest major release of Microsoft 's Windows NT operating system, released on October 5, 2021. It succeeded Windows 10 (2015) and is available for free for any Windows 10 devices that meet the new Windows 11 system requirements. Windows 11 features major changes to the Windows shell influenced by the canceled Windows 10X ...
2024年5月23日 · Pearson correlation coefficient. Several sets of ( x , y) points, with the correlation coefficient of x and y for each set. The correlation reflects the strength and direction of a linear relationship (top row), but not the slope of that relationship (middle), nor many aspects of nonlinear relationships (bottom).
