head erosion 中文意思是什麼
head erosion
解釋
朔源侵蝕-
So, river capture can be taken as the time and space scale of geomorphologic evolution in quaternary in csmasr it can represent the process of river head wards erosion, expand of lincheng period denudation surface and the broken of yangping period denudation surface
認為河流襲奪是判斷地貌演進，即臨城期（第四紀）溯源侵蝕與仰平期剝夷面解體破碎的時空標尺，並據此探討了臨城期河流溯源侵蝕的時空格局。 -
This kind of instability bulk movement is induced by wave cyclic loading, as a result the slope of bottom bed decrease, water depth increase, and instability bulk movement has the character of subregion, regularity and head erosion, thus it will influence evolvement of region of interest landform, and change flow field and bottom stratum condition continually, so will lead to dynamic influence on structure foundation soil
這種不穩定塊體運動由波浪循環荷載誘發，其結果使底床整體坡度減緩，水深加大，而且不穩定的塊體運動具有小區域、多發性和溯源侵蝕的特點，將繼續影響著海域以後的水深地形的發展演化，並不斷改變著該區的流場與底床地層條件，對構築物地基土的穩定性產生著動態的影響。 -
Abstract : for high arch dams in valleys with the characteristics of high water head, large discharge and large power, the problems of energy dissipation and scour prevention are serious. based on scientific studies, new comprehensive measures are proposed, including dispersion of discharge to waken wallop of the current, and reinforcement of riverbed to enhance the erosion - resistance. the measures can be used to solve the problem of energy dissipation properly. a typical layout scheme has been proposed in which slotted bucket with diversion teeth, double deck with pores, and cushion pool are considered practice has proved that the scheme is reliable and the effect of energy dissipation is obvious
文摘:高拱壩泄洪消能的特點是壩高落差大，流量大，功率大，位於河谷狹窄地區，泄洪消能與防沖問題突出.經科學研究，採用「分散泄洪，削弱水流沖擊力，加固河床，增強河道抗沖能力」的綜合治理措施，較好地解決泄洪消能布置問題.提出了表孔大差動坎加分流齒、雙層多孔、水流撞擊、下設水墊塘聯合消能的典型布置方案，經實踐證明，方案可靠，消能效果好 -
Wiener method is based on statistics estimated from a local neighborhood of each pixel. ( 2 ) acquisition of head and brain volumetric data and development real head and brain reconstruction and visualization algorithms : by using threshold technique and morphological operations such as dilate and erosion, head segmented data were obtained. to obtain the brain segmented data, construct an initial template, design and developed a naval algorithm to make the initial template dynamic change with image slice to get the brain data ; designed a framework for searching, sampling and storing contour data
採用灰度閾值技術和數學形態學的操作獲取頭的數據；在對腦的分割中，本文提出了一種根據腦圖像特點和相鄰圖像在幾何結構上具有相似性的特點，構建了自適應模板匹配檢測腦的方法：首先選擇其中最易處理的圖片應用閾值化演算法和形態學方法提取出腦輪廓，然後根據相鄰圖像之間形態具有相似性的特點，再利用形態學演算法實現腦體數據分割的操作。 -
The results show that the screw centrifugal pump is a type of well - working pump with good performance. it has higher head and efficiency with better ability of anti - erosion
研究結果表明，螺旋型離心泵是一種性能優良的增壓泵，具有較高的揚程和效率，良好的抗氣蝕性。
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