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raster model
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  栅格模型
     Although GIS has been applied into marine fishery since 1970s, its development has been lagging behind the land G S.After analyze the spatial features and data characters of marine fishery, this paper has compared the advantages and disadvantages of raster model and vector one in marine fishery field; then put an emphasis on analyzing the importance of raster model to data analysis and spatial pattern exploration of marine fishery;
     本文在剖析了海洋渔业空间特征、数据特征的基础上,研究比较了栅格模型与矢量模型在海洋渔业领域各自的优势和劣势,重点分析了栅格模型对海洋渔业数据分析、模式探索的重要性,提出了海洋渔业GIS发展应立足于栅格模型的思想。
短句来源
     Based on the study in the GDAL Raster Model's theories and methods,this thesis used the interface functions provided by the Model to develop some applications for RS image basical processing such as layerstacking subseting rescaling and algebra oprating,and for SAR image generic processing like the speckle filtering,in SARINFORS These modules are not only able to run stably,but also to improve the efficiency of processing.
     在研究了GDAL的栅格模型的原理和方法的基础上,论文利用模型所提供的接口,在Visual C++ 6.0平台上,开发出SARINFORS系统的多波段影像合成、影像裁剪、数值调整、代数运算等遥感图像基本处理模块以及噪声滤波等雷达数据一般处理模块。 这些模块运行稳定,且在一些影像处理效率有所创新,满足了系统的需求。
短句来源
  栅格数据模型
     Simulating the regular raster model,the study presents a formal spatial data model to represent the planar spatial field with the support of Delaunay triangulation.
     针对这一局限性,仿照规则格网的栅格数据模型,应用DELAUNAY三角网工具,建立一种面向平面空间场表达的形式化数据模型。
短句来源
     Simulating the regular raster model, the study presents a formal spatial data model to represent the planar spatial field with the support of Delaunay triangulation.
     本文针对这一局限性,仿照规则格网的栅格数据模型,应用Delaunay三角网工具,建立一种面向平面空间场表达的形式化数据模型。
  “raster model”译为未确定词的双语例句
     The RASTER Model one/40 graphic system is connected to host computerVAX 780 by a RS 232 communication interface,which produces 1024×1024 high resolu-tion color graphic with 256 greys.
     刻系统以VAX780为主机,通过 RS732串行与图行工作站 RASTER Model one/40相连,能构产生256级灰度,1024×1024高分辩率的彩色图形。
短句来源
     (2) For mathematical model selection, study the processing model for vectorstructured image-graphics sequences, the vector/raster model, vectoroutline and vector skeleton model, and present skeleton-linewidth model,and fully demonstrate the advantages of new models and discuss itspotential applications.
     (2)在数学模型的选择上,讨论了栅格结构的时序图形图像的处理模型、栅格矢量混和模型、矢量轮廓线模型和矢量骨架线模型。
短句来源
     In this paper, a regular raster model for cost field is constructed, based on which network analysis method and cellular automata (CA) method are discussed to obtain the optimum path. At last a case study of CA algorithm is implemented and proves the model and the algorithm are correct.
     该文首先采用规则格网对耗费场进行建模 ,进而基于规则格网表现 ,分别建立网络实现模型和元胞自动机实现模型 ,并探讨了基于元胞自动机模型的最优路径算法 ,通过实例研究 ,说明了算法的正确性。
短句来源
     The differences of classification systems between HLZ and land cover are compared in this paper. Based on the conversion probability of each HLZ type to every land cover type, a marginal conversion raster model of land cover is created. This model wins through the difficulty of converting between the two classification systems.
     在对HLZ(Holdridgelifezone)分类系统与土地覆盖类型分类系统之间的差异性进行对比分析的基础上,根据土地覆盖类型与HLZ生态系统类型的最大对应概率,构建了基于栅格的土地覆盖边际转换模型。
短句来源
     Firstly,in allusion to the difficulty of integrating different data models in integrating spatial information,the characteristic of raster model,vector model and mixed model is analyzed,and then a hierarchical full feature model that the vector and the raster are incorporate is put forward.
     首先针对空间信息网络集成中多数据模型集成的问题,分析了栅格、矢量和混合数据模型的特点,然后提出了一种按层次的矢量栅格一体化全要素模型。
短句来源
  相似匹配句对
     model.
     模型。
短句来源
     Model.
     模型的适用范围。
短句来源
     An Unification Data Model of Vector and Raster
     矢量和栅格一体化的数据模型
短句来源
     Expert System Model for Raster Map Recongnition
     栅格地图识别的专家系统模型
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  raster model
Current GIS describes space based on map layers and by means of either the vector or raster model.
      
The strength of this approach is that accessibility masks can be created in the three-dimensional raster model.
      
The raster model defines neighbourhood by the neighbour between cells, but it can not directly recognize adjacent relations between spatial objects.
      
The vertical-view approach is similar to the popular raster model in the sense that they model space with regular cells.
      
Thus the symbolic location mapping service could be done in the 2D raster model, or the sensor model.
      
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This paper will present the three dimensional molecular graphic workstation on VAX780 computer.The RASTER Model one/40 graphic system is connected to host computerVAX 780 by a RS 232 communication interface,which produces 1024×1024 high resolu-tion color graphic with 256 greys.The molecular models proposed are like to stick figure,spacefilling figure and stick-ball figure.The Van der Waal model is consisted of half shad-ing or all shading color graphics by means of parallel scattering light.The...

This paper will present the three dimensional molecular graphic workstation on VAX780 computer.The RASTER Model one/40 graphic system is connected to host computerVAX 780 by a RS 232 communication interface,which produces 1024×1024 high resolu-tion color graphic with 256 greys.The molecular models proposed are like to stick figure,spacefilling figure and stick-ball figure.The Van der Waal model is consisted of half shad-ing or all shading color graphics by means of parallel scattering light.The stero-solid mod-el is improved by the application of projection information and hidden line technique.This system based on the molecular mechanic and graphic technique can be used tocalculate the molecular energy,to optimize the conformational energy by analysing thebond length,dihedral angle and torsional angle as well as Van der Waal connections,andto study the structure-reactivity by fitting the serial similar molecular structures and com-paring them.

本文介绍一个在 VAX780计算机上开发的三维分子图形工作站系统。刻系统以VAX780为主机,通过 RS732串行与图行工作站 RASTER Model one/40相连,能构产生256级灰度,1024×1024高分辩率的彩色图形。三维分子结构为棍棒型,堆积型和棒球型三种模型。范德华半径的球面明暗模型是利用平行光源照射产生的半阴、全阴彩色图形构成。透视深度信息和消隐技术的应用使得模型的立体感更加真实。系统以晶体结构数据为基础,将分子力学计算与计算机图形技术有机结合起来,实现了分子力学计算,如:计算分子能量,从分析键长,键角,扭转角和范德瓦耳连接,电荷相互作用等方面来寻求最优构象;进行系列分子解构拟合,比较具有相似生物活性的分子几何形状异同,找出空间结构的相关物化合生物特性及其定量关系,研究构效关系。

In this paper,after discussing existing three dimensional spatial data models,the characters of vector data model,raster data model and hybrid model are analyzed.An object_oriented integrative 3D data model is put forward.The model divides 3D space into raster voxels.All 3D objects are filled with raster voxels.Object_oriented method is adopted for object expression.For every object,contained voxels only are stored.Point,line,surface and solid are linked by hierarchy structure and space relation.Common point...

In this paper,after discussing existing three dimensional spatial data models,the characters of vector data model,raster data model and hybrid model are analyzed.An object_oriented integrative 3D data model is put forward.The model divides 3D space into raster voxels.All 3D objects are filled with raster voxels.Object_oriented method is adopted for object expression.For every object,contained voxels only are stored.Point,line,surface and solid are linked by hierarchy structure and space relation.Common point and line and surface are simultaneously stored in adjacent objects.In the aspect of space process,raster method is adopted for operations related with position.Vector method is adopted for calculation and query of space relation. The integrated model has the advantage of both vector and raster model.But it is different from raster model,vector model and hybrid model.Firstly,raster model connects voxels to expresses object through the attribute of voxels.But in the integrated model,raster elements have not attribute value.Voxels belonging to an object are orderly stored in a record.In other hand,raster model stores solid nodes in space order.The space index and expression of object relation depend on the attribute of voxels and reasoning by neighbor and connectivity.But the integrated model organizes sub_space of object by hierarchy structure.Secondly,in vector model,sub_space is divided irregularly and out_of_order.only expresses end point,boundary and surface of objects.But the integrated model fills and expresses interior spaces except for above elements.The difference from hybrid model is that hybrid model must simultaneously store raster and vector data.At the same time,transformation between raster and vector model is necessary,but sometimes it is difficult.In the integrated model,only raster data is stored,but the information about the position,shape,structure and topological relation,etc.,can be described.A remarkable problem is that the numbers of data is enormous and the computing and query speed is slow for raster division to 3D space.In this paper,a method of three_grade division of 3D space is proposed.A rough division is carried out in a first grade.The second and third division is respectively carried out based on above division.The purpose of the third division is to improve the expressive precision of object,the division is carried in boundary of object,such as points,lines and surfaces.So the numbers of data is not remarkably increased.Subsequently,a row_order code method is proposed.The code method is superior to Morton code in query calculation and window display.The storage space in need is also small. Finally,the data structure of an integrated model is presented.

首先对现有的三维空间数据模型进行了讨论 ,分析了栅格、矢量和混合数据模型的特点 ,提出了一种面向目标的栅格矢量一体化数据模型。该模型将栅格数据以矢量方式进行组织 ,从而同时具有矢量和栅格数据模型的优点 ,也克服了目前普遍应用的混合模型所存在的缺点。还提出了一种三维空间的三级栅格划分和行次序编码方法。该方法存储空间小 ,便于快速索引和计算。最后 ,给出了具体的数据结构

In this paper,a standard description about the construction of three_dimensional geological section and geological entity is given,and the mainstream spatial data models are analyzed comprehensively.With this understanding,considering the constructed specialty about professional spatial object and the different characters of three dimensional spatial data models,special three_dimensional spatial data model is only applicable for special application domain.We graft the essential of CE,CSG,B_Reps and the method...

In this paper,a standard description about the construction of three_dimensional geological section and geological entity is given,and the mainstream spatial data models are analyzed comprehensively.With this understanding,considering the constructed specialty about professional spatial object and the different characters of three dimensional spatial data models,special three_dimensional spatial data model is only applicable for special application domain.We graft the essential of CE,CSG,B_Reps and the method of raster model to orgnize tree data structure,adopt the object_oriented method to construct all kinds of objects in target model,finally prefer an object_oriented three dimensional blended data model with integrated vector and raster base on a primary analyze cell.This paper fulfills the unique expression on three_dimensional geological section and whole geological entity with topologic relation,then suggests a visualized schema.In order to test the rationality of the model.We analyze several applications to engineering geology.The result proves that this model is rational and operational.

对工程地质研究的主要三维空间对象 (勘探区域三维地质剖面体 )进行了规范化的构造描述 ,对当前主流三维空间建模方法进行了综合分析。在此基础上 ,结合专业建模对象的构造特点及三维数据模型适用表达对象的不同特性 ,融合单元分解表示 (CE)、构造实体几何 (CSG)和边界表示 (B Repsd)三种数据模型的建模思想 ,以及栅格模型的基本体元划分机制和数据组织方式 ,以不规则五面体为基本分析单元 ,采用面向对象方法构造模型内各类对象 ,提出了一种面向对象的三维矢量与栅格混合模型 ,实现了勘探区域三维地质剖面体的惟一性拓扑表达 ,并给出了可视化方案。分析了几例基于此模型的工程地质应用 ,借以验证该模型在工程地质领域内应用的合理性和可操作性。

 
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