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1978年5月,我们黑颈鹤专业考察组一行7人,受林业部的委托,告别了高原古城——西宁,向青藏高原的腹地进发,准备在3年之内完成这次考察任务。我们是为这次考察拍摄《黑颈鹤之乡》的电视片的。3年来,我们行程两万多公里,踏遍了青藏高原五千多平方公里的土地。泥泞的道路黑颈鹤是我国青藏高原特有的珍禽,在世界上15种鹤类中属最稀有、最珍贵的品种,也是最后发现的一个高山品种,它的价值可以和 相似文献
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In the performance experiment of organic Rankine cycle power generation experimental system, the loadresistance-regulation method is one of the most important regulation methods. However, the regulation law has not been clear enough to guide the experiment, which is unfavorable to the experimental research on organic Rankine cycle. In this paper the regulation law of turbine and generator by the load-resistance-regulation method is studied theo- retically and experimentally. The results show that when the thermal cycle parameters keep constant, the turbine speed increases with the increase of load resistance and there is a maximum value of transmission-generator efficiency with the variation of the turbine speed; when the turbine speed and generator speed keep constant, the transmissiongenerator efficiency decreases and gradually tends to zero with the increase of load resistance. 相似文献
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