The hydrometeors distribution in mcc illustrat that the precipitable ice is dominant which fills in the cloud cluster in almost entire troposphere with maximum cores at the mid - levels . rain water and cloud liquid water are in the middle and lower troposphere , and cloud ice water only scatters at the 8 - 18km upper levels 水凝物垂直分布显示, mcc中可降水冰含量最大,分布在几乎整个对流层,雨水和云水主要分布在的对流层中、低层,而云冰则分布于高层大气中。
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The main tests and researches are as following : to study the ac flashover characteristic of composite insulator in different icing states by imitating tests in multifunctional artificial climate chamber , and analyze the effect of ice amount and icing water conductivity on flashover voltage , put forward a flashover mechanism by analyzing the icing flashover process . to study the ac flashover characteristic of composite insulator in different altitude and icing states together by imitating tests in multifunctional artificial climate chamber , and mainly analyze the effect of altitude ( air pressure ) and ice amount on flashover voltage , and investigate the flashover mechanism . to investigate the effect of high altitude and icing on the hydrophobicity of composite insulators 本文主要进行了以下试验研究: 1 )在多功能人工气候室里模拟不同覆冰程度下合成绝缘子的交流闪络特性,主要分析覆冰量和覆冰水电导率对闪络电压的影响,并对其覆冰闪络过程进行机理分析; 2 )在多功能人工气候室里模拟不同海拔高度和覆冰程度综合作用下合成绝缘子的交流闪络特性,主要分析海拔高度(即气压)和覆冰量对闪络电压的影响,并进行闪络机理分析; 3 )研究高海拔和覆冰对合成绝缘子憎水性的影响。
She prepared the iced water which he was in the habit of constantly drinking , - for since his sojourn at the kiosk he had been parched by the most violent fever , - after which she anointed his white beard with perfumed oil , and lighted his chibouque , which he sometimes smoked for hours together , quietly watching the wreaths of vapor that ascended in spiral clouds and gradually melted away in the surrounding atmosphere 她给他调配他常饮的冰水,因为自从来到水寨以后,他就接连发高烧。她用香油涂抹他的白胡须,为他点燃长烟筒,他有时会连续几小时拿着烟筒抽个不停,静静地望着烟圈冉冉上升,变成螺旋形的云雾,慢慢和周围的空气混合在一起。
With regard to the special environment of high altitude and ice , this paper mainly studies the effect of altitude ( air pressure ) , icing states ( ice amount ) and icing water conductivity on the ac flashover characteristic of composite insulators . furthermore , it analyzes the hydrophobicity of composite insulators in these environments 针对高海拔和覆冰地区特殊的环境,本文重点研究海拔高度(即气压) 、覆冰程度及覆冰水电导率等对合成绝缘子交流闪络特性的影响,并且对合成绝缘子在高海拔和覆冰环境下的表面憎水性变化进行分析。
Based on a series of tests and investigations , this paper draws some conclusions as following by processing and analyzing the test data . the minimum icing flashover voltage of composite insulators decreases with the increase of ice amount , and the tendency of it accords with exponential function . however , the relation of the minimum icing flashover voltage with icing water conductivity accords with power function 通过大量的试验研究工作,对试验数据进行拟合和分析处理,得到了如下结论: 1 )合成绝缘子最低冰闪电压随覆冰重量的增加而降低,且其下降趋势符合指数函数规律,与覆冰水电导率的关系符合幂函数规律。
Ninety volunteers who spent 20 minutes with their feet in bowls of iced water have provided evidence that failing to wrap up warmly is directly linked to falling prey to sore throats and a bunged - up nose . although apparently common sense , straightforward connections between chilling and viral infection have been hard to prove , according to the common cold centre at cardiff university - the world s only centre dedicated to researching and testing new medicines for the treatment of flu and the common cold 据英国卫报11月14日报道,目前世界上唯一一个专门研究和检测各种用来治疗流感及普通感冒的药物的研究机构英国加的夫大学普通感冒研究中心的科研人员表示,尽管多穿衣服可防感冒早已成为常识,但科学家们却一直很难证明在身体着凉与病毒感染之间存在着直接的联系。
Ninety volunteers who spent 20 minutes with their feet in bowls of iced water have provided evidence that failing to wrap up warmly is directly linked to falling prey to sore throats and a bunged - up nose . although apparently common sense , straightforward connections between chilling and viral infection have been hard to prove , according to the common cold centre at cardiff university - the world ' s only centre dedicated to researching and testing new medicines for the treatment of flu and the common cold 据英国卫报11月14日报道,目前世界上唯一一个专门研究和检测各种用来治疗流感及普通感冒的药物的研究机构英国加的夫大学普通感冒研究中心的科研人员表示,尽管多穿衣服可防感冒早已成为常识,但科学家们却一直很难证明在身体着凉与病毒感染之间存在着直接的联系。