time to half value 中文意思是什麼
time to half value
解釋
波尾長-
A more reasonable method to calculate soil ' s damage value is advanced, which bases on extrema of irregular dynamic shear stress. previously it bases on peaks of shear stress to calculate damage value, but by this method the destructive action of multi - point inputted earthquake is overestimated, especially in the second half section of responding shear stress " time history the shear stress caused mainly by differential force undulate slightly on one side of its zero line
以往計算土體在不規則的動剪應力作用下的損傷值根據的是動剪應力的峰值，在時域內多點輸入分析中，由於差動力的的存在，使得時程後段動剪應力不穿零而在一側做幅度不大的波動，基於峰值的損傷值計算特別過高地估計了這段剪應力的破壞作用，過高的程度還隨延時增加而增加。 -
Water delivery has been run over 30 years. the main canal has the problem that the actual conveying capacity is very low now and the conveying capacity of the east - one main canal i only half of the design value, this lead to guaranteed real - time efficiency of the irrigation of the farmland recede greatly. the downstream has no water and crops were drought to death have been seen more times in the irrigation period, this lead to the contradictory between the upstream and downstream on water usage, moreover, the lower discharge capacity of the dry canal in irrigation period is the main cause of the actual irrigated area is only half of the design value
經過三十年的輸水運行，目前乾渠工程存在嚴重的輸水能力低問題，其中東一乾渠輸水能力只能達到原設計的1 2 ，使農田的適時灌溉保證率大大降低，多次發生灌溉期下游見不到水而旱死莊稼的情況，造成上下游用水矛盾突出，而且灌溉期乾渠過流能力偏小，是導致實際灌溉面積僅為設計值的1 3的重要原因。 -
From the researching results, we can see that there are clear cycles ( about 275 days ) in the data array of daily income rate data of hong kong hang seng index and stocks, the time cycles of the stock price and the index present non - linear fractal character, they are a cycling system which is inverse enduring tendency and to be a so called " reback the value ". it signifies that if a system which pre - period is going up ( going down ), there will be over half chance to going down ( going up )
香港恆生指數收益的日數據和個股收益的日數據序列的實證結果均出現了明顯的循環周期（大約是275天） ，股價和指數所構成的時間序列均呈現非線性的分形特徵，他們是一個屬于常被稱為是「均值回復」的反持久性的序列系統，這意味著如果一個系統在前一個期間是向上（向下）走的，那麼它在下一個期間多半是向下（向上）走，今天的股票價格影響未來股價。
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