Quality evaluation of observation data of total radiation recorder
At present, the quality control of radiation observation records in business is conducted by comparing the observed records with historical data of this station, other radiation data, relevant meteorological elements, and information of neighboring stations, combined with the instrument conditions of the station, and the operator operates. The existing problems are analyzed comprehensively and finally conclusions are drawn. The frequency of solar radiation observation records in the Shangdianzi atmospheric background station is 1 #min-1, so there is a certain degree of difficulty in comparison with the 1h cumulative solar radiation recorded by a conventional weather station, and the solar radiation observation record of this station is From January 1, 2005 onwards, the data sequence was short, and there are certain difficulties in quality evaluation through the comparison and analysis of historical data from this site. Due to the high frequency of solar radiation observation records in Shangdianzi, this has the advantage that the radiation data obtained from previous weather stations do not possess the advantages of measuring the ground solar radiation inversion by satellite remote sensing. Therefore, it is necessary to evaluate the quality of radiation observation data. At the same time, the total radiation recorder can find and correct the problems in the data acquisition process through the near-real-time quality evaluation of the radiation observation data, so that the data obtained in the future can be of higher quality.
For the total radiation recorder to perform the fourth step test on the solar radiation data after the above-mentioned three-step inspection, that is, the visual zero test of the/radioactive observation sequence, this paper calculates the ground solar total radiation observation value Eg and the calculated value Ecg. The method of RMS error and coefficient of variation is completed. The difference between the observed total solar radiation on the ground and the total ground solar radiation calculated from direct and scattered radiation should be within the uncertainty given by the instrument when the sky is sunny or the instrument is stable. When the solar elevation angle > At 10b, the difference between the two should be <2% or 15W#m-2. When the solar elevation angle is low and the instrument is unstable, the difference between the two should be <3% or 20W#m-2 if the difference is greater than these values. , it needs further examination to determine the cause of such a big difference.
The root mean square error and coefficient of variation between the gross solar radiation observed value Eg and the calculated value Ecg of the total radiation recorder not only overcomes the subjective error caused by the visual 0 test of the /radiometric observation sequence, but also The observation data records that strictly meet the quality inspection can also be marked, providing reliable and reliable verification data for applications such as verification of ground solar radiation satellite remote sensing inversion results.
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High temperature alloy is divided into three kinds of material: 760 ℃ high-temperature material, 1200℃ high temperature and 1500 ℃ high temperature materials, the tensile strength is 800 mpa. On other words,it refers to the metal material worked well in the condition of 760-1500 ℃ or above. It owns excellent high temperature strength, good resistance to oxidation and thermal corrosion resistance, good fatigue properties, fracture toughness and other comprehensive performance, this kind of material has became an irreplaceable key material in military and civilian gas turbine engine hot end components . According to the relevant theory, 760 ℃ high-temperature materials, according to the matrix elements,can be mainly divided into high temperature iron base alloy, nickel base superalloy and cobalt-based super alloy. According to the preparation process,it can be divided into deformation and high temperature alloy, casting high temperature alloy and powder metallurgy super alloy. According to the solid methods,it can be divided into solid solution strengthening, precipitation strengthening and oxide dispersion strengthened with fiber reinforced type, etc.
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