positive period method 中文意思是什麼
positive period method
解釋
正周期法-
The main work and conclusion for this paper is as following : according to the flashover test results of several kinds of iced insulators under positive voltage and negative voltage, this paper obtained : for the single porcelain insulator, the single glass insulator and the composite insulator bridged completely by icicle, the metal cathode ' s strong ability of emission electron is the primary reason that results in the lower negative flashover voltage ; the position difference of the high resistance district in method anode side results in that porcelain insulator cluster and glass insulator cluster have an evident effect of polarity ; when less ice and no icicle at the brim of the sheds, due to numerous non - polar arcs on the composite surface, the effects of polarity of composite insulator was lost using the test method of the average flashover voltage in the freezing period, dc flashover performances were investigated of several insulators with some typical structures and different material
本文的主要工作和結論如下：在人工氣候室內，根據不同覆冰絕緣子正、負極性下的閃絡試驗結果，得出負極性電弧金屬陰極的強電子發射能力造成了單片瓷、玻璃絕緣子及被冰凌橋接的合成絕緣子有較低負極性冰閃電壓；正極性電弧金屬陽極側產生高電阻區所處位置的差異使得瓷和玻璃絕緣子串具有明顯的極性效應；覆冰較少時，合成絕緣子表面出現數量較多的非極性電弧使合成絕緣子無極性效應。利用覆冰期內平均閃絡電壓的試驗方法，對不同材質和結構的絕緣子在覆冰、低氣壓和污穢共存環境中的直流閃絡特性進行了研究。試驗結果表明，直流平均閃絡電壓隨著海拔的升高、覆冰量的增加以及污穢度的增加而降低，且其特徵指數與絕緣子結構、覆冰量、覆冰狀態、污穢度等有關。 -
It has been a relatively long period since the basic theory of the economics of law was introduced to china, and some scholar has achieved some results of significance through the research of applying the logic positive analytical method of economics to the matters of law
法經濟學的基本理論被介紹到國內已有一段時間，有些學者把經濟學的邏輯實證分析方法運用於法律問題的研究也已經獲得了一些有意義的成果。 -
Then, we got the general conclusion by combining theory analyze and practice this question for study puts forwards new modal of teaching set, school - based environment by using the theory study method, positive study method and comparative study method, whose main purpose is to strengthen the environment education in the middle school of small towns in the concrete school environment on the base of the best use of school resources and local social environment it ' s proved that it greatly improves the length of limitation period and actual practical behavior it is good to develop the students " principal partivities, cultivates the students " active study
最後，文章結合理論分析與教育實踐得出了一般性教學結論，並提出了下一步的教學建議。本課題用原理研究法、實證研究法和比較研究法，提出校本環境教育這一新的模式，目的是在充分利用學校資源、社區資源的情況下，在具體的學校情景中加強小城鎮高中的環境教育。通過實踐證明，它明顯地提高了環境教育的時效性和實效性，強化了學生的實踐行為，利於學生主體性的發揮、主動探究性的培養，同時也有效地提高了教師責任、素質和科研意識，使教師的角色發生變化。
分享友人