正地槽系 的英文怎麼說
中文拼音 [zhēngdecáoxì]
正地槽系
英文
orthogeosynclinal system-
Disigning coolant channel on the firebox of liquid rocket engine to loxodrome ( equal - angle helix ) groove can improve firebox coolant capability greatly. because the width dimension of loxodrome groove is narrow and the depth is deep, some machining methods are incapable, such as end - milling or electrochemistry. according to the peculiarities, a cnc disk - cutter - milling method which is composed of five motion axes with four simultaneously interpolated ones is researched. because most firebox generatrix is composed of complex curves, it is very difficult to get cnc cutting program with manual means. in order to deal with the problem, the loxodrome mathematics model is studied, and an auto - programming software system is developed. the software system can generate cnc cutting program of loxodrome on many kinds of turned surface. the constriction - distension segment of firebox is the most representative workpiece. the sharp changing of its generatrix slope makes loxodrome milling difficult. with the theory analyzing and practice cutting experiment, some applied techniques, which include milling mode and direction, choosing cutter diameter and cutting start point setting, are developed. adopting the technology above, tens regular workpiece have been manufacturing. the two - year manufacture practice has confirmed the validity and feasibility of developed loxodrome coolant channel milling method. the developed technology is also worth to be referenced to other similar workpiece
將液體火箭發動機燃燒室的冷卻通道設計為斜航線（等傾角螺旋線）槽形，可以大幅度改善燃燒室的冷卻性能.斜航線冷卻槽的槽寬尺寸較小而槽深尺寸較大，所以無法使用棒銑刀銑削、電化學等加工方式.針對這些特點，提出了五軸控制、四軸聯動的數控片銑刀銑削加工方法.由於燃燒室外表面的母線輪廓復雜，手工編制數控加工程序難度大.為了解決數控加工程序的編制問題，研究了斜航線的數學模型，開發了自動編程軟體系統.使用該系統，可以生成多種母線輪廓回轉體外表面上的斜航線數控加工程序.燃燒室收斂-擴張段的母線斜率變化大，加工難度大，是斜航線冷卻通道加工的最典型工件.經過理論分析和實際切削實驗，研究了針對該類型工件的片銑刀直徑選擇、銑削方式和方向、刀具調整和起刀點的設置等多項實際的加工方案.採用上述的一系列技術，已經成功地加工了數十個合格工件.經過兩年多的實際生產過程應用，驗證了所開發的斜航線冷卻通道加工方法的正確性和可行性.這些加工技術的研製成功，對其他相似類型零件的加工亦具有參考意義Based on the discuss of the geologic environment of the high slope of spandrel groove jinping i hydroelectric power station. and the engineering geological conditions of rock mass are carefully studied in the paper. the modified csmr are adopted to perform the classification of the slope rock mass, the results of which are combined with the macroscopic stability of the high slope. on the basis of these, the methods of geological diagnosis and the finite element analysis are applied to analyze and compute the overall stability of the high slope
本文在闡明錦屏一級水電站壩區巖體的形成和演化特徵的基礎上，詳細研究了拱肩槽高邊坡巖體的結構特徵及岸坡巖體淺表生改造特徵，建立了岸坡巖體淺表生改造與岸坡演化模式，分析研究了巖體的物理力學性質，採用修正的csmr法對拱肩槽高邊坡的巖體質量進行分級研究，在此上基礎之上，採用地質分析判斷和有限元分析等方法，對高邊坡整體穩定性進行了系統分析、計算與評價；應用塊體理論對高邊坡的局部穩定性進行了分析計算，確定局部不穩定塊體的規模、出露范圍，從而對拱肩槽高邊坡的局部穩定性有了系統全面的認識和了解。Abstract : it is shown in this paper that distributions of electric fields in five measuring slots of uster evenness tester, and the errors caused by uneven electric fields were analysed. according to the results of measuring and analysing electric fields, a set of tests were made, and several estimation to the errors were given. at last, notices of operation were given
文摘:實測了烏斯特紗線均勻度試驗儀上5個電容測量槽的電場強度分佈，分析了由測量槽不均勻電場所引入的誤差.系統地測試分析了第5號槽誤差，獲得了幾種誤差的定量估計.最後給出了正確使用儀器，避免測量誤差所應注意的幾點結論In this thesis, first, reasons and factors for the stability of loose rock dams were summarized according to the field surveys and certain expert ' s experiences. then, researches on block stability problems were reviewed, and according to the relationship between grain size and incipient velocity, it is found that the block weight is in direct proportion to 6 - 9 power of incipient velocity, and 50 % increase of the velocity will result in about 40 times change of the block weight. after that, experiments were conducted in a flume, focusing on the relationship between incipient velocity and some main factors including block weight, water depth over the dam, cross - section size, block material and river bed material
本文首先根據散拋石壩損毀情況的現場調查資料，結合有關專家多年的整治經驗，總結出壩體的損毀原因及影響因素；對現有塊體穩定性的研究成果進行回顧和總結，並針對散拋石壩的直接損毀現象，結合山區河流的水流、地形特點，利用塊體粒徑與起動流速的關系，提出塊體穩定重量與起動流速高次方成正比的概念，流速50的增長可能導致塊體穩定重量接近40倍的變化；通過二維變坡水槽試驗，研究了壩體穩定的主要影響因素，包括塊體重量、壩頂水深、斷面尺寸、塊體材料（塊石和卵石兩種） 、護底等，結果表明對于山區河流，試圖僅僅通過增加壩體單個塊體重量或斷面尺寸來提高壩體穩定性效果甚微；最後，根據西部地區的自然、經濟、交通等條件，提出可以採用柔性混凝土鉸鏈體等一類整體性較好的護面層作為散拋石壩的防沖毀措施，以期取得良好的工程效果。Beginning form relation of basin - mountain, the tectonic evolution and the petroleum system and pool - forming process have been studied with the integration of structural physics modeling, balance profile reversion and other new testing technology. the main innovative achievements of the dissertation can be summarized as following : 1. on the basis of comprehensive analysis of yanqi basin relationship to tianshan orogenic belts, it was suggested that kuluketage faulted - upheaval was an aulacogen in early paleozoic, which undergone multiple opening - closing along with tianshan orogenic belts, and suffered extensively compressing in late hercyhian cycle and formed a " v - type " thrust - fold belt
論文總的指導思想是以現代石油地質理論為基礎，以整體、動態、系統、綜合分析為原則，以成盆?成烴?成藏研究為主線，運用正、反演相結合的殘留盆地油氣成藏系統評價思路，採用構造物理模擬、平衡剖面復原和多種測試新技術，從盆山耦合關系切入，研究含油氣系統成藏要素及其相互作用過程，探討油氣成藏主控因素和油氣分佈的有序性，取得如下創新性成果和認識： 1 、系統分析了焉耆盆地形成演化與天山構造帶的關系，提出盆地南側的庫魯克塔斷隆在早古生代為一大型裂陷槽，之後隨著天山構造帶的演化，經歷了多次開合運動。4, the summer rainfall anomaly in northeast china bears close correlation with the atmospheric circulation backgroud. while cold air in middle and high levels of troposphere is active in wet year with the positive anomalies over high - latitude and polar area, the active longwave ridge, the anomalous long - wave ridge in northeast china and inner - mogolia as well as the northward and eastward of the polar vortex, the contrary is in the dry year in northeast china
4東北地區夏季降水異常與大氣環流背景有密切的關系，東北地區夏季多雨年在對流層中、高層冷空氣比較活躍，高緯和極區主要由位勢高度的正距平所控制，貝加爾湖以北的地區長波脊較為活躍，在東北地區和蒙古地區有異常的長波槽發展，極渦位置偏北、偏東；而在東北地區夏季少雨年則容易出現與上述相反的異常環流形式。分享友人