流線形地形 的英文怎麼說
中文拼音 [liúxiànxíngdexíng]
流線形地形
英文
streamline molded form-
The yanchang formation of upper triassic in north shaanxi is major terrigenous clastic system deposited in fluvial - latchstring environment, under the influence of the llocyclicity factor which include indosinian tectonic, eustacy, sedimentary supplies and the autocyclicity factor. in late triassic, north shaanxi was divided into two parts bounded by zhidan - ganquan - yichuan demarcation line
陜北地區上三疊統延長組是以河流一湖泊相為特徵的陸源碎屑巖系，當時的陜北地區，以志丹?甘泉?宜川沿線為界，南側以明顯的斜坡向深湖盆地過渡，北部則為一地形平緩的淺水臺地。On a topographic map of the united states, the mountains look like jagged masses, the plains like vast open flat spaces, and the rivers like meandering threads.
從美國地形圖上看，大山好像參差的土堆，平原像開闊平坦的空地，河流像蜿蜒的細線。But now it ' s urgent to adopt new methods for calculating the head loss of regional drainage due to some factors such as long length, large flow quantity and probable strong topographic change
由於存在管線長、流量大以及區域地形變化幅度可能較大等因素，建設區域排水系統需要採用新的方法較為準確地計算水頭損失。The calculation method of ln ( / tan # ) index widely used is the multiple flow direction algorithm developed by quinn et al. it can been seen that, in the algorithm, the contour length normal to the direction of flow flowing out the current cell is used to determine both a and tan #, and that the calculated total cumulative contributing area of downslide grid cell does not include the area of the current cell
目前普遍使用的計算該地形指數的方法為多流向法。方法中計算和tan用的均是與流出單元網格流向垂直的等高線長。另外計算下坡單元網格累積匯流面積時沒有考慮欲計算ln （ tan ）值的單元網格的面積，這些是不合理的。When catchment area, average channel gradient and catchment shape factor of designed culvert or bridge are known, a user can be convenient to get local parameters c, e and b from standard contour charts and easy to calculate flood flow just by a calculator. design period of flood flow is enormously shortened as well as a high precision. estimated flood flow through culvert or small bridge by new calculation model is generally less than by traditional methods, so that much cost is cut down a s reducing the span of culvert or small bridge
以75000km ~ 2的川中丘陵地區為試點研究區，繪制了該地區新模型的參數等值線圖，率定了不同設計頻率的改正系數，使設計者只需在地形圖上獲取集水面積，河道平均坡降和流域形狀系數，在參數等值線圖上查得橋涵所在地的相應參數，使用計算器即可迅速計算出設計流量，大大縮短了設計周期，且精度較高，設計的洪水流量一般低於傳統方法，從而可減小橋涵跨徑，節省投資。Abstract : through a series of hydraulic model tests for researching actual power tunnel operation, a conclusion is reached that in order to get a better flow pattern the profile of the wate - carrying structure should be adapted to the variation of water streamline shrinkage, flow velocity and pressure intensity. the configuration and dimension of the kinetic energy dissipator should be selected carefully to make the water tunnel safe and reliable at different levels of diversion dischage
文摘:針對實際工程中的發電引水隧洞運行的各種工況進行了水工模型試驗研究，指明要獲得良好的水流流態，過水建築物各部位結構輪廓的造型應適應水流流線的收縮、流速及壓強的變化；為使引水隧洞在各級引水流量下能安全可靠地運行，需慎重確定洞內消能工的體形和尺寸。Geometry characteristic and the tracing of flown lines combined to extract terrain structure lines
幾何特性與流線追蹤相結合的地形結構線提取法The purpose of this web site is to share my experiences with workers in any country on water logging in agricultural lands, irrigation induced soil salinity, subsurface drainage for agriculture ( horizontal and vertical ), reuse of groundwater, ground - water hydraulics, ( geo ) hydrology, rainfall and surface runoff relations, reclamation and improvement of water logged saline, salty, sodic alkaline, and acid sulphate soils, plant growth, crop production and responses as well as statistical analysis consisting of segmented linear regression and cumulative frequency distributions
描述:探討農業耕地的水澇問題；灌溉導致的土壤鹽堿化；地表灌溉；地下水的再利用；地下水水力學；雨水與水流失的關系；淺地表排水；土壤開墾及水澇，酸性，堿性土壤的改良；片段線形回歸和累積頻數分佈的統計分析等。In the skeleton extraction, an novel approach for extracting the skeletons directly from the gray images is developed by simulating the procedure of water eroding the topography surface. the resultant skeletons are single - pixel width and connected. it also lies in the middle line of the object and keeps the topological properties of the original image unchanged
在骨架提取方面，論文提出了一種通過模擬水流沖刷地形表面的過程來直接從灰度圖象中提取目標的骨架的高效演算法，它可以得到連通的、保持目標的拓撲屬性的、處在目標的中線上的、近似單象素寬度的骨架。The analysis of the large - scale synoptic situation shows that strong precipitation is closely related to the explosion of monsoon and the intensification of cross - equatorial flow which bring a lot of vapor and meet with cold masses at the eastern of northwest district on 8th, june causing extremely heavy rainfall ; that subtropical high - level jet at 200hpa, subtropical high at 500hpa and low - level jet at 850hpa are the weather backgrounds favorable to strong precipitation ; that the pattern of eastern highs and western lows and the establishment of a low - level jet and the coupling between upper - and low - level patterns that determine that the rain occurred in the east of the northwest china ( on average, this is the rainy season for the south of china, but not for the northwest china ) ; that water vapor comes from southerly and easterly flow which converge at the eastern of northwest district with convergence mainly in lower levels and pbl ; that the high value of the whole - level apparent heat source < q1 > is near the area of large rainfall in the direction of northeasterly - southwesterly agreeable to shear line very well and the condensation latent heat releasing is main heat source with vertical advection item playing key role in q1 and q2 ; that there is a vertical secondary circulation crossing low - lever jet whose ascending branch is at the area of large rainfall ; that the construction of convection instability and conditional symmetry instability results that there is not only deep thermal instability, but also moisture influx and triggering mechanism of thermal instability causing strong torrential rain
作為對比，本文還對2002年6月24 - 25日發生在北京地區的強地形雨進行了分析，並討論陜南、北京地區兩地暴雨的異同點以及地形作用的共性和個性，為兩地暴雨預報提供有益的參考，得出了一些很有意義的結果： 1大尺度環流背景分析表明： （ 1 ） 「 02 . 6 」強降水與6月上旬越赤道氣流和季風爆發密切相關，攜帶大量水汽的偏南氣流與冷空氣於6月8日交匯在西北地區東部，導致了這次強降水的發生； （ 2 ） 200hpa的副熱帶西風急流、 500hpa副高以及850hpa的低空急流的配置非常有利於本文分析之陜西強降水的發展與維持。大尺度形勢分析表明，東高西低形勢場、低空急流的建立和高低空形勢的配置決定了這場降雨出現在西北地區東部。與暴雨區相聯系，存在一支橫越低空急流的經向垂直環流，暴雨區處于該垂直環流的上升支； （ 3 ）偏南和偏東氣流水汽通道在西北地區東部交匯，水汽的輻合積聚主要在對流層低層和行星邊界層內完成； （ 4 ）整層的視熱源< q _ 1 >高值區在暴雨區附近呈東北-西南向分佈，與切變線走向非常一致，降水產生的凝結潛熱釋放是強降水區大氣的主要熱源。Based on above views, by analyzing power structure and building power system theory model, many important summations have been made which they followed : the texture of fdi is an none liner, many circle - roads and complex giant system which is made up by economics factors, political factors, systematic factors and the investors " psychological factors
以上述觀點為基礎，通過分析動力結構，建立國際直接投資動力機制理論模型，得出如下重要結論：國際直接投資地域結構是由經濟因素、政治因素、體制因素以及決策者的心理因素等共同作用下國際生產資本跨國流動動所形成的非線性、多迴路的復雜巨系統。In this part, the first work is pretreatment of a numerical model, including creating calculating grids automatically, improvement of the linear boundary technique and so on. the second work is to estimate the siltation of a basin or channel by liu ' s equation. the third work is to build an edbms ( engineering data base management system ) for the result of mathematical model
其中主要的工作是：其中主要的工作一是數學模型的前處理，計算網格自動生成，線邊界法的優化；二是應用劉家駒公式在長江口深水航道治理工程地理信息系統的支持下實現港池、航槽開挖的實時回淤估算；三是將計算成果形成gis管理和支持下的工程數據庫系統（ engineeringdatabasemanagementsystem ） ，同時嘗試解決時間序列數據如地形沖淤變化，潮位、流速過程的分析、查詢和顯示問題，並實現實時、互動的動態演示及三維可視化。The first can be called a typical huabei mcs, whose initial convections are arisen by terrain forced climb ; the second initial convections are arisen by boundary convergence lines in the afternoon, meantime the lower level cold air from huabei plain also contributes to their formation
第1次是比較典型的華北mcc中尺度對流復合體過程，它是由地形強迫抬升觸發了初始對流。第2次初始對流是由午後的邊界層輻合線觸發的，從華北平原南下的淺薄冷空氣也起了重要作用。The model simulations indicate that the severe storm is occurred in the pattern high - level of northwest flow, the waterjumping downhill flow form taihang mountain is the key mechanism to initiate the convective, on the other hand, the terrain can induce unbalanced low - level flow, which play an importance role in generating the mesoscale gravity waves ( mgws ) by convergence and divergence in low - level troposphere
（ 2 ）太行山對華北強對流風暴的發生有重要作用。一方面，地形可引起邊界層風場的變化，包括風垂直切變、下坡氣流和中尺度輻合線，從而對風暴的啟動、組織和移動發揮作用；另一方面，山脈背風波動和地形產生的不平衡氣流，有利於中尺度重力波（ mgws ）的產生和維持，並對下游地區強對流天氣的發展產生影響。However, people studied the riverway mainly by field survey and landform map contrast before. because of the limits of man ' s field view and complexity of field survey route, it is a difficult bottle neck for people to make synthetical analysis on geological structure, yangtze river shoal, floodplain, terrace, and microcosmic suspended load on macroscopical scale
而以往的河道研究大多數是通過地面調查和地形圖室內對比分析來研究的（少數運用航片） ，由於受人的視域范圍及調查工作路線的布置的復雜度影響，對區域宏觀尺度下的地質構造、長江沙洲、漫灘、階地及河流微觀領域的懸浮物等作綜合性的研究便成為了瓶頸。It adopts holton model to calculate infiltration rate and remains, water balance equation and linear reservoir to calculate runoff, every parameter has a clear physics meaning and geography rule
採用霍爾坦模型計算下滲率及截留量，水量平衡方程和線形水庫進行柵格產匯流計算，模型的每個參數具有明確的物理意義和地理規律。The new algorithm starts from an initial estimate which is based on the hough transform, and a rectangular window is centered using the current line approximation, and a new line estimation is generated by making a total least squares fit through the pixels contained within the window. this is repeated until convergence is reached. lastly, we have suggested a new technique which may recover the motion and structure parameters of a moving object by using of 21 optical flow lines based on the optical flow fields of the feature line this thesis is the project supported by aeronautical foundation science ( no. 99f53065 ) and research center of measuring and testing technologies, and control engineering in nanchang institute of aeronautical technology ( no. 2001 - 15 )
演算法的思路是：首先，在小區域內運用霍夫變換確定直線的初始值；其次，以直線的初始值所對應的直線為中心線，建立一個矩形框；最後，利用矩形框內所包含的邊緣點數據不斷地迭代直至收斂，從而達到進一步修正直線的坐標參數；本文基於特徵直線的光流場，即線流場，建立了一種利用21條光流線確定空間三維物體旋轉運動參數、平移運動參數以及對應的空間直線坐標的線性演算法。As far as vibration is concerned, there is an urgent need to establish relevant laws and standards that not only conform to international standards but also satisfy local residents. these standards must be set according to the technical limitations that govern mrt construction in densely - populated areas : namely, line configuration, station location, headway, soil cover, proximity of residences, underground passage, road width, etc
又如振動問題，在狹隘都會區中建造捷運系統，受到線形、設站、車間距、道路覆土深度、緊鄰民房、地下穿越、路輻等技術限制，故如何訂定一套合於國際潮流之標準又能府合民意之The computations are shown to agree well with available experimental and numerical data and the physics of 3d large - scale flow separations and vortex shedding are confirmed. the simulation of the flow around a maneuvering wigley hull is a demonstration of capability for calculations of sway forces and yaw moments acting on a hull moving obliquely at a large range of yaw angles. the focus of study is large - scale cross - section separation flows, bilge - vortex development along the hull in the longitudinal direction and their effects on hydrodynamic forces
應用所開發的求解器，以wigley船型為算例計算了大角度斜航船體粘性流場和水動力，分析了漂角的變化對船體所受到的粘性水動力的影響，相當精確地預報了以橫流分離和般渦生成與泄出為特徵的操縱運動船體特有流動形態及橫向水動力和轉脂力矩，經與現有試驗和計算數據比較，檢驗和驗證了該求解器精確模擬繞斜航運動船體的大尺度分離流動和計算非線性水動力的能力。Based on an analysis of the formation mechanism of induced current in underground pipelines, the author holds that, where underground media show very poor conductance, underground pipelines are dominated by magnetic dipole lines, and where underground media have certain conductance, pipelines are equivalent to electric wires
摘要通過對地下管線中的感應電流形成機理分析，本文認為，當地下介質導電性很差時，地下管線以磁偶極線為主；而當地下介質存在一定的導電性時，管線則等效于電流線。分享友人