介绍利用高精度传感器制做电子蒸渗计，监测土壤水分及实际应用原理，测量精密度检验方法。
The method of measuring soil moisture using Lysimeter made of high accuracy sensor and the principle of application are introduced. The accuracy examination is also performed.
本文分两节对门限自回归模型中自回归条件异方差的广义谱密度检验进行了讨论。在第一节中，我们介绍了广义谱密度检验。
This thesis is composed of two sections in which we discuss generalized spectral density test of conditional autoregressive heteroscedasticity for threshold autoregressive model.
对在粪大肠菌群实验过程中涉及到的实验室质控设备、培养基、精密度检验等内容进行了分析，并对实验过程中的关键问题进行了阐述。
The quality controlling equipment in lab, medium and accuracy test during the bacteriology experiment were analyzed, and then the key problems in the fecal coliforms experiment were discussed.
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