应用多种数学方法对青海省历年的农机总动力进行了预测，取得了良好的效果。
The article has forecasted the agricultural mechanical total power of Qinghai province past years with multi-mathematic methods, and obtained good effects.
文中对趋势包络预测方法进行了详细介绍，并应用此方法，依据历年的数据对黑龙江省农机总动力进行了预测。
This paper introduce the forecasting method of trend envelope totally, and based on the old data, the Heilongjiang Provice agriculture machinery total power prediction is carried on with the method.
对于室外作业的农机具，使用气力技术需要解决气源动力和气源部属总质量的问题。
For outdoor working, the problem of gas fountain and its gross weight need solve.
对于室外作业的农机具，使用气力技术需要解决气源动力和气源部属总质量的问题。
For outdoor working, the problem of gas fountain and its gross weight need solve.
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