psychrometer

The paper has analyazed the two kinds of errors in measurement of hydrogen humidityby psychrometer DHM - 2 in domestic power station at present.

1引言在我国火力发电厂中，目前普遍使用阿斯曼通风式干湿表测定氢冷汽轮发电机内冷却介质氢气的绝对湿度，在实际测量中由于没满足干湿表使用所需的测量条件和测量操作不得法，所以测量结果相对偏差很大。

Based on the day by day air temperature and rainfall data of 14 weather stations over the source region of the three rivers(Yangtze,Yellow and Lancangjiang rivers),the evolution law of the extreme cold,warm,dry and wet climatic events as well as cause of its variations are analyzed.

利用三江源地区14个气象台站1962—2005年逐日气温、降水资料分析了该地区冷暖干湿极端气候事件的演变规律,探讨了其变化成因。

based on the day by day air temperature and rainfall data 14 weather stations over the source of three rivers, the evolution rule of the extreme cold, warm, dry and wet climatic event as well as its variation reason over this area is analyzed.

利用三江源地区14个气象台站1962-2005年逐日气温、降水资料分析了该地区冷暖干湿极端气候事件的演变规律,探讨了其变化成因。