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2020-12-16
A solar car vacuum cleaner
2020-12-16
2020-12-16
2020-05-28
2020-05-28
2020-05-28
2020-05-28
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2020-05-27
Errors and efficiency figures during solar survey
In the measurement, the amount that can be directly read out by the measuring instrument is called the direct measurement amount; the amount obtained by the direct measurement amount and some constants and function operations is called the indirect measurement amount. The number of significant digits of the direct measurement (the last digit of the significant digit should be the estimated digit) is determined by the accuracy (minimum scale) of the measuring instrument. That is, the maximum absolute error of the measuring instrument is obtained from the accuracy of the instrument (hereinafter referred to as the error), and the error is only reserved for one significant digit. Finally, the position where the effective digit of the error is located determines that the measurement is valid. The cutoff digits. For example, if the length of a wooden stick is measured by a ruler with a minimum scale of i=1mm, the length of a wooden stick is 300mm, because the maximum error of the ruler is $=i/2=0.5mm, the cut-off position of the effective number of the measurement should be 1 At /10mm, it should be expressed as L=300.0mm. Note that the /00 after the decimal point must be written here and cannot be omitted.
SAF Coolest v1.3 设置面板 JHWSX-ASVP-WSZAE-FAA
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