Based on generation mechanism of breaking and vibration type pressure bump of hard roof, the forecast technique of pressure bump is put forward, through site test, the comprehensive forecast system of “support load-voice emission combined observation, abstrictions and deformation of roadway, the stress test of coal body and drill cuttings test of coal body” is formed and good safety result was obtained.
This paper presents the simultaneous observational results with high resolution in hard X-ray and microwaves during the impulsive phase of solar flares in the maximum year of the 21st cycle of solar activity.
So, the next total eclipses of the Sun, of 1 August 2008 and 22 July 2009, offer an excellent opportunity for preparing joint observations for space-borne and ground-based eclipse teams.
Self-entropy and conditional entropy, which measure how uncertain a sensor is about its own observation and joint observations respectively, are adopted.
Many joint observations are made with CDS and other SOHO instruments, and calibration of the pointing is crucial to the co-pointing of the instruments, and to the analyses of these data.
Type-A and Type-B heat spells are obtained respectively from Tmax and Tmin observations and Type-C heat spells from simultaneous joint observations of Tmax and Tmin using suitable thresholds and spells of duration ≥1-day and ≥3-day.