Abstract : soil incubation experiments were conducted in lab to delineate the effect of soil temperature and soil water content on soil respirations in broad - leaved / korean pine forest ( mountain dark brown forest soil ), dark coniferous forest ( mountain brown coniferous forest soil ) and erman ' s birch forest ( mountain soddy forest soil ) in changbai mountain in september 2001. the soil water content was adjusted to five different levels ( 9, 21, 30, 37 and 43 ) by adding certain amount of water into the soil cylinders, and the soil sample was incubated at 0, 5, 15, 25 and 35 for 24 h the results indicated that in broad - leaved / korean pine forest the soil respiration rate was positively correlated to soil temperature from 0 to 35. soil respiration rate increased with increase of soil water content within the limits of 21 to 37, while it decreased with soil water content when water content was over the range. the result suggested the interactive effects of temperature and water content on soil respiration. there were significant differences in soil respiration among the various forest types. the soil respiration rate was highest in broad - leaved / korean pine forest, middle in erman ' s birch forest and the lowest in dark coniferous forest. the optimal soil temperature and soil water content for soil respiration was 35 and 37 in broad - leaved / korean pine forest, 25 and 21 in dark coniferous forest, and 35 and 37 in erman ' s birch forest. because the forests of broad - leaved / korean pine, dark coniferous and erman ' s birch are distributed at different altitudes, the soil temperature had 4 - 5 variation in different forest types during the same period. thus, the soil respiration rates measured in brown pine mountain soil were lower than those in dark brown forest and those measured in mountain grass forest soil were higher than those in brown pine mountain soil
文摘:為了研究土壤溫度和土壤含水量對闊葉紅松林(山地
暗棕壤) 、雲冷杉
暗針葉林(山地棕針葉林土壤)和岳樺林(生草森林土)的土壤呼吸的影響,於2001年9月在長白山進行了土壤實驗.利用增加土壤樣
柱的含水量,將土壤含水量分為9 , 、 21 、 30 、 37和43 5個等級,土壤樣品分別在0 、 5 、 15 、 25和35的溫度下保持24小時.闊葉紅松林土壤在0 ( 35范圍內,土壤呼吸速率與溫度呈正相關.在一定的含水量范圍內( 21 ( 37 ) ,土壤呼吸隨含水量的增加而升高,當含水量超出該范圍,土壤呼吸速率則隨含水量的變化而降低.土壤溫度和水分對土壤呼吸作用存在明顯的交互作用.不同森林類型土壤呼吸作用強弱存在顯著差異,大小順序為闊葉紅松林>岳樺林>雲冷杉
暗針葉林.紅松闊葉林土壤呼吸作用的最佳條件是土壤溫度35 ,含水量37 ;雲冷杉
暗針葉林下的山地棕色針葉土壤呼吸作用的最佳條件是25 , 21 ;岳樺林土壤呼吸作用的最佳條件是35 ,含水量37 .但是,由於長白山闊葉紅松林,雲冷杉林和岳樺林處在不同的海拔帶上,同期不同森林類型土壤溫度各不相同,相差4 ~ 5 ,所以野外所測的同期的山地棕色針葉林土呼吸速率應低於
暗棕色森林土呼吸速率,山地生草森林土呼吸速率應高於山地棕色針葉林土的呼吸速率.圖2表1參25
Soil incubation experiments were conducted in lab to delineate the effect of soil temperature and soil water content on soil respirations in broad - leaved / korean pine forest ( mountain dark brown forest soil ), dark coniferous forest ( mountain brown coniferous forest soil ) and ermans birch forest ( mountain soddy forest soil ) in changbai mountain in september 2001. the soil water content was adjusted to five different levels ( 9, 21, 30, 37 and 43 ) by adding certain amount of water into the soil cylinders, and the soil sample was incubated at 0, 5, 15, 25 and 35 for 24 h the results indicated that in broad - leaved / korean pine forest the soil respiration rate was positively correlated to soil temperature from 0 to 35. soil respiration rate increased with increase of soil water content within the limits of 21 to 37, while it decreased with soil water content when water content was over the range. the result suggested the interactive effects of temperature and water content on soil respiration. there were significant differences in soil respiration among the various forest types. the soil respiration rate was highest in broad - leaved / korean pine forest, middle in ermans birch forest and the lowest in dark coniferous forest. the optimal soil temperature and soil water content for soil respiration was 35 and 37 in broad - leaved / korean pine forest, 25 and 21 in dark coniferous forest, and 35 and 37 in ermans birch forest. because the forests of broad - leaved / korean pine, dark coniferous and ermans birch are distributed at different altitudes, the soil temperature had 4 - 5 variation in different forest types during the same period. thus, the soil respiration rates measured in brown pine mountain soil were lower than those in dark brown forest and those measured in mountain grass forest soil were higher than those in brown pine mountain soil
為了研究土壤溫度和土壤含水量對闊葉紅松林(山地
暗棕壤) 、雲冷杉
暗針葉林(山地棕針葉林土壤)和岳樺林(生草森林土)的土壤呼吸的影響,於2001年9月在長白山進行了土壤實驗.利用增加土壤樣
柱的含水量,將土壤含水量分為9 , 、 21 、 30 、 37和43 5個等級,土壤樣品分別在0 、 5 、 15 、 25和35的溫度下保持24小時.闊葉紅松林土壤在0 ( 35范圍內,土壤呼吸速率與溫度呈正相關.在一定的含水量范圍內( 21 ( 37 ) ,土壤呼吸隨含水量的增加而升高,當含水量超出該范圍,土壤呼吸速率則隨含水量的變化而降低.土壤溫度和水分對土壤呼吸作用存在明顯的交互作用.不同森林類型土壤呼吸作用強弱存在顯著差異,大小順序為闊葉紅松林>岳樺林>雲冷杉
暗針葉林.紅松闊葉林土壤呼吸作用的最佳條件是土壤溫度35 ,含水量37 ;雲冷杉
暗針葉林下的山地棕色針葉土壤呼吸作用的最佳條件是25 , 21 ;岳樺林土壤呼吸作用的最佳條件是35 ,含水量37 .但是,由於長白山闊葉紅松林,雲冷杉林和岳樺林處在不同的海拔帶上,同期不同森林類型土壤溫度各不相同,相差4 ~ 5 ,所以野外所測的同期的山地棕色針葉林土呼吸速率應低於
暗棕色森林土呼吸速率,山地生草森林土呼吸速率應高於山地棕色針葉林土的呼吸速率.圖2表1參25
In particular, different inclined angles and the bind core effect of concealed bracings are considered in the analysis. and the concept of concrete confined is introduced in the concrete of the rims, concealed columns and concealed bracings
分析中考慮了
暗支撐的不同傾角及核芯束作用,並在邊框、
暗柱和
暗支撐中的混凝土引入了約束混凝土的概念。
The ratio of light conductivity to dark conductivity of the nv - si / a - si : h photoconductor is 103, and the light conductivity of nc - si / a - si : h photoconductor in the normal is 2 - 4 times more than that in the lateral
這種nc - si a - si : h光導膜具有
柱狀結構,薄膜的光
暗電導比達到10 ~ 3 ,其縱向電導率是橫向電導率的2 4倍。
Then came a shattering explosion, and a great pillar of water rose in the darkness.
接著一聲驚天動地的爆炸,在黑
暗中激起了巨大的水
柱。
Built in 1750, the archway of modesty, is a structure with four pillars. the emperor qianlong of qing dynasty wrote “ han xu ” and “ yan xiu ”. these two words describe the beauty of this imperial garden
涵虛牌樓:建於1750年,它有四
柱,主樓石額東西刻有「涵虛」 、 「罨秀」為乾隆親筆寫的御書,
暗喻頤和園這座皇家園林的美麗。
Levels should only be adjusted to the start points of the histogram graph on both shadows and highlights
色階工具只能通過移動色階
柱狀圖的起止點來調整
暗調和高光。
Sandwich seismic wall which concrete column was replaced with angle - steel truss was discussed in this paper in order to be used as outer - walls of multi - story shear walls system
本文研究的是以角鋼桁架代替混凝土
暗柱的夾芯保溫混凝土抗震墻,以下簡稱復合墻板。目的是用作小高層剪力墻體系的外墻。
At present, the research of special - shaped columns is pool in the world and the research of r. c special - shaped columns with concealed column and arbitrarily inequiaxial r. c special - shaped columns is less. the theoretical research of ductility of the two types of special - shaped columns is processed and the designed compression ratio is determined in the article. a method of theoretical research of curvature ductility is put forward on the basis of existed research documents of special - shaped columns
國內外都有關于異形
柱方面的研究文獻,但多集中在普通異形
柱方向,而對帶
暗柱的異形
柱和不等肢異形
柱的研究較少,即使涉及到這兩個領域,但都是很膚淺的一些研究,本文將對這兩種異形
柱的延性性能進行理論研究並確定它們的設計軸壓比限值。
The children fastened their eyes upon their bit of candle and watched it melt slowly and pitilessly away ; saw the half inch of wick stand alone at last ; saw the feeble flame rise and fall, climb the thin column of smoke, linger at its top a moment, and then the horror of utter darkness reigned
孩子們眼睛盯著那截小蠟燭頭,看著它一點一點無情地燒掉,最後剩下半英寸長的燭心,那軟弱的燭光忽高忽低,順著細長的煙
柱往上爬,爬到頂部徘徊了一會,接著恐怖的黑
暗完全籠罩了一切。
Compared with the normal flat - plate floor, the cast - in - place reinforced concrete hollow flat - plate floor has two special characteristics. to produce the hollow floor, the hollow columns are pre - buried in the floor. there are concealed wide - flat beams between the frame columns
和普通平板無梁樓蓋相比,現澆鋼筋混凝土空心板無梁樓蓋有兩個突出的不同點,一是在樓板內預埋空心圓筒形成空心樓板,二是在框架
柱之間設有
暗扁梁。
Iron gates between granite pillars showed me where to enter, and passing through them, i found myself at once in the twilight of close - ranked trees
兩根花崗石柱之間的鐵門,才使我明白該從什麼地方進去。進門之後,我便立即置身於密林的晦暗之中了。