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checkerboard n. 〔美國〕跳棋盤。2.vt. 在…上縱橫交錯地排列[...

Structure development and street pattern have been built up such as “ checkerboard form “ and “ jing tian form “ 西安城市發展結構形態及街道格局始終以保持漢唐長安城“棋盤式” 、 “井田式”發展起來形式。

Structure development and street pattern have been built up such as “ checkerboard form “ and “ jing tian form “ 西安城市發展結構形態及街道格局始終以保持漢唐長安城“棋盤式” 、 “井田式”發展起來形式。

checkered

It applies an interval method to select element in the evolutionary structure optimization method ( eso ) , and recovers or deletes element by the “ birth and dead ” function of element . another method viewed as second order smoothing technique for suppressing the checkerboard patterns has been proposed based on the filtering function ’ s principle . then the above methods are applied to solve a temperature - controlling problem in the steady heat conducting field and a multi - objective topology optimization problem considering multiple load cases and coupled effect 本文基于ansysparametricdesignlanguage ( apdl ) ,提出漸進結構法中應用區間法進行單元的篩選,通過單元“生死”的功能實現單元的恢復與刪除,根據濾波函數法原理提出修改的二階棋盤格處理方法,并就穩態熱傳導溫度控制問題,考慮熱、力耦合的多載荷工況的多目標拓撲優化設計問題進行求解。

To completely avoid producing elements jointed at their corner nodes and checkerboard patterns , which frequently occur when the topology optimization of plane continuum is studied , the theory of topology analysis of plane continuum in topology optimization process and the simple algorithm for programming are studied . according to algebraic topology theory , the boundary of elements and plane continuum are operated as a one - dimensional complex . by use of the adjacency vector in graph theory , the structural topology is described and the topological operation is achieved on a computer . by above , the structural topological feature in the evolutionary process is gained . these methods are effcient and reliable . under topology constraints , according to the results of stress analysis , by deleting elements and moving nodes at the boundary , more satisfactory results can be gained by using a few numbers of elements and iterations . to demonstrate the efficiency of these methods , solutions including some well - known classical problems are presented 避免目前平面連續體結構拓撲優化過程中經常出現的單元鉸接以及“棋盤格”等現象,研究了連續體結構拓撲優化過程的拓撲分析方法,以及在計算機上實現的簡便算法.根據代數拓撲理論,單元及連續體的邊界作為1 -復形進行運算.利用圖論中的鄰接向量概念,在計算機上實現了結構的拓撲描述及拓撲運算,得到了結構在拓撲演化過程中的拓撲特性,方法簡單、可靠.在一定的拓撲約束下,根據應力分析結果,采用刪除單元、單元退化、移動節點等方法,可以用較少單元得到更為滿意的結果,提高計算效率.為演示方法的有效性,給出幾個包括常見經典問題的解答

Realizes the longitudinal relationship between models by using object - oriented programming language ; 2 ) sets forth the function and software design in detail , and analyzes entities of the system . realizes the randomness of traffic flow and constructs vehicle arriving model , vehicle movement model on road segments and vehicle movement model on intersections , so completes the kernel part of traffic simulation ; 3 ) uses 3d modeling software - multigen creator and real - time simulation software - vega to build up the 3d virtual environment of microscopic traffic simulation , and drives dynamic entities such as driver - vehicle units and traffic lights in static scenes ; 4 ) studies the characteristic of checkerboard system of street layout , analyzes and decomposes the system to deduce a certain simplification method . and researches the application of urban traffic route choice 論文主要工作如下: 1 )利用面向對象技術分析交通仿真系統模型之間的橫向關系和交互作用,研究靜態實體的狀態變化和動態實體的運動規律;利用面向對象的程序設計語言實現系統中模型的縱向關系; 2 )詳細闡述交通微觀仿真系統的功能設計、軟件設計,分析仿真系統中的實體;實現車流的隨機性,建立車輛的到達、車輛在路段上的行駛過程、車輛通過交叉口的行駛過程等模型,完成交通仿真的核心內容; 3 )利用三維建模軟件multigencreator和實時仿真軟件vega建立交通狀態微觀仿真的三維虛擬環境,在靜態視景中驅動駕駛員-車輛單元、信號燈等動態實體; 4 )研究棋盤式道路格局的特點,從理論上分析并分解系統,得到一定的簡化依據,進一步研究城市交通路線選擇的應用。

The soil physical composition , organic matter , total nitrogen , total phosphorus , total potassium and ph of salix psammophila ccheckerboard and contrast sand of dalate county were investigated in 2005 , the effects of salix psammophila checkerboard on physical and chemical characteristics of sandy soil were analyzed 摘要本試驗于2005年在達拉特旗測定了設置沙柳沙障的沙丘和對照樣地(未設沙障)的土壤機械組成、有機質、全氮、全磷、全鉀、酸堿度等理化指標,對比分析沙柳沙障對土壤理化性質的影響。

Study indicated that establishing salix psammophila checkerboard can effectively keep the earths surface from coarsening , because salix psammophila checkerboard can obviously increase the fine sand and clay sand of soil surface , accounting for 15 . 1 % , 18 . 3 % , powder sand increased by 1 . 8 times 結果表明:設置沙柳沙障的沙丘表層細沙含量比對照樣地提高15 . 1 % 、粘粒提高18 . 3 % 、粉沙含量是對照地的1 . 8倍,說明設置沙柳沙障能夠增加沙丘表層細顆粒含量,有效控制地表粗化。

Organic matter , total nitrogen , total phosphorus and total potassium content was higher than barren sand , increasing by 1 . 78 , 1 . 97 , 1 . 64 , 1 . 14 times , it showed salix psammophila checkerboard improved fertility condition of soil 設置沙柳沙障后沙丘土壤有機質含量是對照地的1 . 78倍,全氮含量是對照地的1 . 97倍,全磷含量是對照地的1 . 64倍,全鉀含量是對照地的1 . 14倍,說明設置沙柳沙障能夠改善沙丘土壤的養分狀況。

The resolution of pn image eastmated by use of checkerboard method indicates : velocity resolution reaches 3o x 3o , anisotropy resolution reaches 4o x 4o in most regions , the resolution is low in marginal region 用檢測板方法進行反演結果的分辨率測試,結果表明,大部分地區對速度空間變化的分辨能夠達到3 3 ,各向異性分辨能夠達到4 4 ,邊緣地區分辨一般較差。

For the sake of avoiding the phenomenon of checkerboard lattice , a kind of filtration technique for the high ordered redistribution of sensitivity was put forward on the basis of filtration technique of sensitivity redistribution in document ( superscript [ 13 ] ) 為了避免棋盤格現象,在文獻[ 13 ]的靈敏度再分配的過濾技術基礎上,提出了一種靈敏度高階再分配的過濾技術。

When the plane wave returns and crosses the molecule , it produces an interference pattern with the stationary part of the electron wave function , like two trains of water waves crossing and forming a checkerboard disturbance 一旦平面波折返并橫越過分子,它便會與待在軌道上的電子波產生干涉圖樣,就像是兩道水波相遇所形成的西洋棋盤般明暗交錯的擾動。

The phenomenon of checkerboard is a kind of common phenomenon in structural topologic optimization of continuous body of fixed finite element lattice especially when modeling with the first ordered finite element 摘要棋盤格現象是固定有限元網格的連續體結構在拓撲優化中一種常見的現象,特別是用一階有限單元建模時。

The existence of checkerboard lattice let the interpretation of the optimal results become difficult , and let the collection of geometric model suitable for processing during post - treatment become very difficult 棋盤格的存在使優化結果的解釋變得困難,后處理時提取適合于加工的幾何模型變得非常困難。

The checkerboard fields of the chia - nan plain are the richest assets left to us by our ancestors , and are also the best place for city dwellers , who are often cut off from nature , to learn about farming life 嘉南平原上田連阡陌,是祖先留下最豐厚的資產,也是遠離自然的您體驗農業生活的最佳所在。

The seventh decade of this century went out in loud outrageous fashion as quiksilver let loose with echo beach prints which included polka dots , triangles and checkerboards 隨著quiksilver發布echo沙灘圖案包括波爾卡圓點三角形和西洋跳棋盤后引發的風靡一時的時尚潮流,本世紀七十年代宣告結束。

Introduction : according to chess which race in law to put all of the checkerboard lattice not repeat it again to follow through , there are three hurdles 按照象棋當中“馬”的走法把棋盤中所有的格都不重復地走一遍為過關,共有三關。

Most of the maniples went into battle as separate blocks of men in a square formation that looked something like a checkerboard from above 大多數“戰團”投入戰斗的時候,會獨立形成一個個方陣,看上去好象一幅國際象棋棋盤的樣子。

According to chess which race in law to put all of the checkerboard lattice not repeat it again to follow through , there are three hurdles 按照象棋當中“馬”的走法把棋盤中所有的格都不重復地走一遍為過關,共有三關。

Structure development and street pattern have been built up such as “ checkerboard form “ and “ jing tian form “ 西安城市發展結構形態及街道格局始終以保持漢唐長安城“棋盤式” 、 “井田式”發展起來形式。