A method for estimating the times of freezing and thawing in actual environment
A technology based on the number of actions and the actual environment, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of difficult quantification and complex changes of freezing and thawing in the actual environment
Active Publication Date: 2018-01-26
TIBET TIANYUAN ROAD & BRIDGE CO LTD
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[0007] Due to the fact that the freezing and thawing of the actual environment is affected by the climate and environmental conditions, the changes are extremely complex, and there are few reports on the prediction of the number of freezing and thawing in the actual environment, which makes the quantification of the freezing and thawing in the actual environment difficult.
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[0074] The patent of the present invention will be further described below in conjunction with the accompanying drawings.
[0075] Taking the Wudaoliang area in the cold area of the Qinghai-Tibet Plateau as an example, the specific application of the present invention is described.
[0076] Using the one-dimensional linear fitting method, the change law of the historical data of the freezing and thawing times in the Wudaoliang area is analyzed, as shown in figure 2 shown. The frequency of freezing and thawing in the Wudaoliang area fluctuated greatly, and generally showed a decreasing trend.
[0077] Using the M-K test method, the number of freeze-thaw events in the Wudaoliang area is analyzed in terms of annual time series, as shown in image 3 shown. The time series of freeze-thaw effects at different levels in the Wudaoliang area is extremely complex, and there are many mutations. .
[0078] Using the wavelet analysis method, the time period of the freeze-thaw actio...
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The invention discloses a method for estimating the number of freeze-thaw actions in the actual environment. By statistically analyzing the number of positive and negative alternations of the daily maximum temperature and the daily minimum temperature in the air temperature data of a certain area, the number of freeze-thaw actions in the actual environment in the area is obtained, and then based on Mann‑Kendall test, Morlet wavelet analysis, and R / S analysis method to establish a prediction model for the number of freeze-thaw events; among them, the Mann‑Kendall trend test reflects the long-term trend of the number of freeze-thaw events over time, and wavelet analysis reveals the periodic changes of freeze-thaw events , the R / S analysis reflects the irregularity of the future change trend and provides a basis for the prediction of the number of freeze-thaw events in the future; the method for predicting the number of freeze-thaw events in the actual environment proposed in this study can diagnose the number of freeze-thaw events in a certain area over time and Future trends; thus providing reference for civil engineering infrastructure construction, life prediction, maintenance, etc. affected by freeze-thaw.
Description
Technical field: [0001] The invention belongs to a method for predicting the times of freezing and thawing actions, in particular to a method for predicting the times of freezing and thawing actions in an actual environment. Background technique: [0002] Climatic and environmental conditions have a significant impact on the stability, durability, and performance of civil engineering infrastructure. For highway projects with linear characteristics, the impact of climatic environment is particularly significant. The impact of climate and environment on civil engineering infrastructure is relatively indirect, subtle, highly variable, and intertwined with loads, so it is very difficult to quantitatively separate the impact of environmental factors. [0003] Freezing and thawing is the combined effect of temperature and moisture. It refers to a physical effect and phenomenon of freezing and thawing due to the temperature dropping below zero and rising above zero. Freezing and th...
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IPC IPC(8): G06F19/00
Inventor 司伟马骉李宁周雪艳田宇翔
Owner TIBET TIANYUAN ROAD & BRIDGE CO LTD