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simulation mode Application in Winter Wheat North-moving

Agricultural Science & Technology 2011年第12期12卷 1962-1965页

作者：邹立坤蓝岚冯丽肖河北农业大学河北保定071001 中央司法警官学院河北保定071000 保定学院河北保定071051

[Objective] The aim was to study the simulation mode application in winter wheat north moving.[Method] Based on meteorological data of many years collected in north of Hebei province,and arrangement of multi-location field experiment,mode against cold was constructed considering cold-resistance characteristics of wheat.[Result] Wheat overwintering was forecasted with the help of working mode,results were verified,and the safe northern boundary for wheat overwintering in Hebei was determined in regions below dam in the south of 41°N.[Conclusion] This study provided reference for exploration of dynamic rules of wheat growth,and growth influence by environment and plant technique.

关键词： Winter wheat Safe northern boundary of planting simulation mode

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Numerical analysis on water-inrush process due to floor heave

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Journal of Coal Science & Engineering(China) 2008年第2期14卷 225-229页

作者：郭保华 School of Energy Science and Engineering Henan Polytechnic UniversityJiaozuo 454010China

To investigate the water-inrush process due to floor heave,simulation model was made and factors of mining height,immediate roof strength,water pressure,depth and strength of confiningbed,excavation step distance and bury depth were analyzed by using UDEC *** zones theory (containing two maximum main stress circles and three maximum main stress stratiform zones) along excavation direction was proposed, and two-ends-fixed beam mechanical model in maximum main stress circle was estab- *** is found that water inrush always occurs at the end of the beam where shear stress is higher,that is to say,it always occurs at near the starting cut and working face. Water pressure,height and strength of confiningbed are the determined factors,and min- ing height,immediate roof strength,excavation step distance and bury depth effect water inrush process due to floor heave.

关键词： water inrush floor heave simulation mode

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