air heading
3.With orthogonal polynomial the relationship between middle-season rice yield and meteorological factors (air-temperature,precipitation,sunshine-time)during ear differentiation, heading and seeding stage of middle-season rice over the years in Jingzhou City was analysed.
5.According to the serious heat disasters occurred during the mine construction period in Barapukuria Mine in Bangladesh,the paper summarized and analyzed the heat disaster features of the mine. The paper studied the principle of the compressed air refrigeration technology and the application of the refrigeration technology to the roadway heading face in the mine with the economic comparisons. The paper listed the actual applied results.
