key terrain 中文意思是什麼
key terrain
解釋
重要地勢-
The technique of 3d terrain generation is the key technique in the virtual digital battlefield environment construction, where scene reality, multi - resolution and attribute query ability on terrain model are desired. in this dissertation, i discuss model data obtainment and model generation methods
三維地形環境生成技術是虛擬數字戰場環境生成的關鍵技術，要求地形模型是一種真實、多解析度的、具備屬性查閱功能的幾何模型。 -
How to ensure the project implement safely and effectively, esp in the complicated condition of geology, the terrain and its features, is the key to restrict the project finishing successfully ; in this paper, the theoretic analyse and pratical study based on the extension of 309 country road ( from wuan to shexian in hebei province ), adopt the method of theoretical analyse, caculater and experiment, improve the controlling blasting skill and construction crafr of roadbed stonework, control the blasting harm effectively, accomplish the construction quickly and safely in normal conditions. the paper puts forward to the relative parameter applying to roadbed extension in beforecrack blasting, and raises the combination of beforecrack demolition and buffer demolition, which is the main way to conctrol the side - slope stable and taking shape. putting to use the achievement produces great social benifet and economic benefitjt has widely practical future
特別是在復雜的地質，地形及地物條件下，如何保證工程的安全快速有效實施成為制約工程順利完成的關鍵。本文的理論分析和實踐研究以國道309河北武安至涉縣段改建工程為依託，採用理論分析計算與現場試驗相結合的方法，研究並優化了路基石方控制爆破技術與施工工藝，有效控制了爆破危害，實現了保證現有公路正常運營條件下的快速安全施工，本文提出了在預裂爆破中適合於路基擴塹工程的有關參數。同時提出了預裂爆破與緩沖爆破相結合是控制邊坡穩定和成形的主要途徑。 -
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。 -
Real time seafloor tracking technique is the critical technique to ensure smooth seafloor surveying with full coverage and high efficiency. after detailed investigation on stochastic features of seabed reverberation produced by mbss systems, the author presented an algorithm and a set of relevant key coefficients for real time seafloor tracking, taking into account of characteristics of signal processing and timing sequence of the real system and introducing theorems of terrain surveying. as an achievement, a mathematical model was established based on the technique of centered filtering
海底地形實時跟蹤技術是保證多波束測深系統實現高效率全覆蓋水下地形測量的核心技術，作者通過對多波束測深系統海底回波信號統計特性的研究，依據地形測量理論，並結合實際系統信號處理的技術特點和處理時序，提出了實現海底跟蹤控制的關鍵參數及計算方法，建立了基於中值濾波技術的海底地形實時跟蹤數學模型，並開發出實時地形跟蹤專家系統，該系統經多次海上實驗驗證表明：理論正確、方案可行，取得良好效果。 -
Key issues on multi - resolution representation and real - time simplification algorithms of multi - resolution of terrain model are then studied, which are simplification algorithms of dem, relativity calculation, off - line calculation, region division calculation, visibility calculation depending on fov ( field of view ) and error control, and real - time reality rendering. the simplification algorithms of self - adaptive triangulation regular networks and hierarchical triangulation irregular networks basically depending on fov are thoroughly studied. in the end, based on theories and methods discussed in this paper, a gis platform named hypergis and hyperterrain of terrain visualization software are developed and implemented
並以jarnopeschie的演算法為基礎，全面研究了路網的自動綜合演算法通過分析研究多解析度地形表現模型和實時地形簡化應解決的關鍵技術問題，進一步研究了規則三角形網和顧及地面特徵點線的不規則三角形依賴于視點的多解析度地形模型簡化演算法；應用研究所取得的理論和方法，開發了系統實現模擬軟體hypergis和hyperterrain 。 -
Lighting control, material, view transformation ), that we can get realistic 3d terrain in chapter 4, we discuss the key technology of the zzco2 radar armored reconnaissance tank system, which includes multiple rs - 422 serial port communication, the synchronous of thread, the overlap operation of i / o, the application of windows graphics function, the multiple layer display of electronic map, and orale dbms etc
第四章具體介紹雷達偵察車系統軟體中的關鍵技術，包括rs - 422多串口通信、雷達偵察系統中的線程同步和i / o重疊操作、 windows圖形功能在本系統中的應用、電子地圖多層顯示、 oracle數據庫等。 -
It is accepted that combustible factors ( vegetation, type of forest and ventilation ), temperature, climatic factors ( relative humidity, wind ( speed ) and days of coutinuous drought ), and terrain factors ( slope, aspect and altitude ) considerably affect forest fire, but human burning activity is still considered as the key factor of wildfire
可燃物中林下地被物，樹種和與閉度，氣象因子中氣溫，相對濕度，風和連續乾旱日數，地形因子中坡向，坡度和海拔對林火災害影響較為顯著，但人野外用火行為是導致林火發生的關鍵因素。 -
Visualization of terrain information is playing a key role in many applications such as flight simulation, 3d geographic information system, etc. however, with the rapid development of the remote sense and satellite technology, people expect to investigate or view larger terrain regions with finer precision, which inevitably leads to the real time visualization of huge terrain dataset
地形信息的可視化在實時模擬和地理信息可視化系統中佔有十分重要的地位。然而隨著遙感技術，衛星技術的發展，使得獲取高解析度的數字幾何高程數據以及影像紋理數據成為可能，人們希望觀察更廣范圍的地形，對地形的實時繪制提出了更高的要求。 -
Full - automatic image matching is the key problem and has many difficulties : poor and repetitive texture, terrain discontinuity, shadow, occlusion and projective deformation etc
其主要難點表現在：紋理信息缺乏、重復紋理、深度斷裂與陰影、較大的投影變形等。 -
Shiphandling simulator is a device that can partly imitate the true environment at sea ， and is specially designed to satisfy marine education and trains and maritime research etc. one of its key techniques is to create the virtual environment at sea ， and the terrain is its important component. according to the needs of the real time visual display of the shiphandling simulator ， this paper analyses the requirements of the geometry precision of the important islands and background hills which are within the ships ' visible scope ， and brings forward the modeling methods of the hill ' s pileup and the hill ' s silhouette edges based on contour lines. it also presents the definition of error that the hill ' s silhouette edges graph has been given and the effective scope of application ， and firstly established the error criterion of terrain model that is built in shiphandling simulator. with these two kinds of method ， the size of data storage can be minimized greatly ， and the requirements of high update rate and geometry precision for the real time visual display of the shiphandling simulator can be satisfied
船舶操縱模擬器是一種能夠部分模仿海上真實情況，專門為滿足航海教育與培訓、航海技術研究等目的而設計研製的裝置，其核心技術之一是海上視景模擬，而地形地貌是海上視景中的重要組成部分.根據船舶操縱模擬器實時視景顯示的需要，在分析航行船舶對可視范圍內重要島嶼與背景山脈的幾何精度要求的基礎上，提出了基於等高線的山形堆積建模和山形輪廓建模方法，並給出了山形輪廓圖形的誤差定義、有效適用范圍，以及船舶操縱模擬器中地形建模的誤差準則，該方法生成圖形的數據量較小，其圖形更新速率與幾何精度能達到船舶操縱模擬器實時視景顯示的要求 -
For the purpose of battlefield terrain simulation, in order to solve the problem of building and real - time display of large scale terrain, designed and developed a 3d terrain model database of missile force virtual training, optimized the model with its key technology, such as levels of detail, texture mapping etc, and proposed a solution for real - time display of large scale terrain based on view - point and double measurement which has been successfully applied into the simulation training of missile force
摘要以戰場地形模擬為目的，針對某導彈陣地大規模地形生成與實時顯示問題，設計開發了適用於某導彈部隊虛擬訓練的三維地形模型數據庫，採用層次細節、紋理映射等關鍵技術對模型進行優化處理，提出基於視點的雙度量法實時顯示大規模地形，將將其成功應用於某導彈部隊虛擬訓練中。 -
The rendering of continuous lod terrain surface is the key technique to build the virtual battlefield scene, and it is also the technical basis of generating the special effects such as craters, tire tracks
地形表面的連續層次細節動態繪制技術，是構建虛擬作戰自然環境的關鍵技術，也是生成彈坑和車輛駛過地面后留下的壓痕等地表特殊效果的技術基礎。 -
Firstly, the theory and characteristic of comgis is studied. secondly, the key techniques, such as map digitalization, autocad dxf file conversion, computational gridding, methods for interpolation, the 3d terrain visualization, and the results correction, are introduced. and lastly, a framework on numerical modeling is implemented and applied in a practical research work on coastal engineering
本文首先介紹了組件式地理信息系統的原理和特點；接著重點討論了前處理過程中各種關鍵的技術，包括地圖數字化技術、數字地圖數據讀取方法、計算網格生成技術、插值方法的選取、地形可視化技術以及計算結果修正方法等；最後本文提出了前處理系統的設計框架，並結合一個海岸動力數值模擬的研究實例，討論了前處理系統的具體應用。 -
Based on the 3d display principle and some key technology of 3d scene using 3d graphic language - opengl, the 3d terrain and objects on the earth ' s surface visualization is studied. a method on establishing the complex objects by the modeling tool - 3dmax is proposed and implemented
在介紹基於opengl的三維景觀顯示原理和關鍵技術的基礎上，對論文中地形、地物的可視化進行了研究，提出了利用建模工具3dmax構建復雜的標志性地物的方法並予以實現。 -
Terrain contour matching algorithm is the key of terrain contour matching system. the improvement and software development of this algorithm are presented with simulation results support
地形相關演算法及其軟體實現，是地形匹配系統工程實現的一個非常重要的部分，也是本文的主要研究內容之一。 -
This paper covers four key points in the 3d visualization study of terrain, including the technology of image pretreatment with contour lines, the approaches of establishing three - dimentional terrain models, the real - time reflection of geographical data and the fast display of the terrain
論文對等高線數據圖像的預處理技術、地形三維建模的方法、地形數據的實時渲染和地形真實感快速顯示都進行了較為深入的研究。
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