查询词典 spatial model

For the studies of GIS uncertainty, error band model of a line segment is one of the current focus issues, which reason is not only that there are many open questions for the uncertainty of line segment but also that the uncertainty of line segment is the base of both the uncertainty of the surface element and GIS spatial analysis.

对GIS不确定性的研究来说，线元不确定性的研究是一个重点，因为线元不仅是面域不确定性的基础，其本身也是GIG叠置分析、缓冲区分析和空间地址配对分析等的基本元素。

In this thesis, the mathematics model was used to simulatc the alage growth in Lake Taihu; An enzyme-linked immunosorbent assay was used to monitor the spatial and temporal distribution in 2001; The microcystis spp was culturede with scendesmus obliqaus to study the toxin secrete mechanism of the MC from the population competition; The degradation of the MC by the sediment collected from Lake Taihu and one of the submerged mcrophyte Elodea nuttalli were discussed.

本文采用数学模型的方法模拟了太湖藻类的生长情况；应用酶联免疫吸附法监测了2001年MC的时空分布情况；在实验室内进行藻类培养，从种群竞争的角度初步探讨了MC的产毒机理以及太湖底泥和沉水植物对MC的自然降解作用等。

The model was used to explain the influence of the effect of engulfment and mixture of fuel and the air at jet boundary under the extinction critical conditions. The spatial correlation analysis of concentration field revealed the existence of large scale vortexes with self-similarity of distribution and size.

另外，通过对射流浓度场的空间相关性分析发现，在射流内部存在着自相似的大尺度浓度团，对大量动态图像的统计分析表明，这些涡团结构在不同的射流高度上的分布和尺度均有自相似性。

Spatial data quality estimated by band model of error entropy is discussed in the article,and area is selected to be the measure index In the last the rationality is verified.

讨论了利用误差熵不确定带评价空间数据质量，并选择面积作为指标计算量，最后用实例说明了该方法的合理性和科学性。

In this thesis, a spatial error model of multi-axis NC machine tools is presented, and a feasible method is improved for measuring its fundamental error component.

本文围绕五轴联动数控机床的加工精度，从几何误差补偿到伺服控制再到轮廓误差控制，进行了多方位的理论研究。

Prediction of spatial distribution of Eupatorium adenophorum Sprengel based on GARP model:A case study in Longitudinal Range-Gorge Region of Yunnan Province

利用云南纵向岭谷区紫茎泽兰的分布及其环境因子数据，通过GARP模型预测了紫茎泽兰的潜在入侵区域。

Expansivity, contraction, rebirth and vanishment events for management of land use data. And it further designed an object-superposition data updating model based on the land use feature of point, line and polygon,which would take the advantage of the GIS overlay function to effectly implement of updating spatial and attribute data .

从面向对象的方法入手，定义了引起土地利用变化的扩展、收缩、新生与消亡四种地理事件，并分别按点状地物、线状地物和面状图斑的土地利用实体特征设计了对象叠加更新模型，从而能利用GIS强大的空间分析能力，来有效地实现空间数据和属性数据的一致性更新。

Therefore, peeling off extensity from regional ity has become the precondition of abstracting theoretical model of regional spatial structure.

因此 ，从区域性中剥离出空间性，就成为区域空间结构理论模型提炼的前提。

It is the first important step in video analysis and will directly affects the effectiveness of indexing Shot boundary detection is one of our major research interests and we will tackle the following existing problems the ambiguity between gradual change and camera motion, the discontinuity during gradual change, false detection caused by illumination variation and flashlight, automatic threshold selection Firstly, we discuss shot boundary detection in non-compressed domain In chapter 2, we compare some of the commonly used detection methods which are based on frame difference and point out that single feature will not generate good results As a conclusion, we use fuzzy logic to combine multiple features Presently, most frame difference based shot boundary detection algorithms rely on threshold and hence the selection of such thresholds will greatly affect the performance of boundary detection We propose a membership function to define frame difference and calculate the membership with self adaptation according to the statistic distribution of frame differences to satisfy different type of video clips Experiments show that the proposed fuzzy shot boundary detection algorithm can be used with different video types and has a high detection precision and recall In chapter 3, we discuss model-based shot boundary detection algorithms regarding chromatic and spatial editing effects such as fade-in, fade-out, dissolve and wipe Various parameters are proposed to better describe the characteristics of each editing type.

镜头边界的检测是把视频自动地分割为一个个镜头，作为基本的索引单元，因此它是视频分析重要的第一步，直接影响到视频检索的成败。镜头边界的检测是本文研究的重点之一。目前镜头边界检测算法主要存在以下问题：渐变与镜头运动难以区别；渐变过程中的不连续与停顿、光照条件的变化及闪光灯等特殊情况会引起误检测；自动选择阈值比较困难等。本文首先针对非压缩域视频进行了镜头边界检测的研究。在第二章中我们采用了比较流行的基于帧间差的方法。在比较各种帧间差计算方法的基础上，指出使用单一的特征难以取得很好的检测效果，提出用模糊逻辑综合使用各种特征。目前大多数基于帧间差的镜头边界检测算法都采用阈值法进行镜头转换的判别。阈值选择的误差对检测性能有较大的影响，本文提出用隶属度函数定义帧间差较大、中等较大和较小等概念，并根据帧间差的统计分布自适应地确定隶属度，以适应不同类型的视频片断。实验结果表明这种基于糊逻辑的镜头边界检测算法可以适应不同的视频，并具有较高的检测精度和检出率。在第三章中采用基于模型的方法进行镜头渐变的检测，研究了淡入／淡出、慢转换和扫换的模型。

The 3-D crustal stress model for Zhaoao oilfield was built up on base of the finite element numerical simulation. The crustal stress spatial distribution was obtained which is close to real stress field.

应用有限元数值模拟的方法，建立了赵凹油田三维地应力模型，得到了与真实应力场最为接近的地应力空间分布，确立了地应力分布与套损的关系。

Chinese traditional virtue is humility and wariness,the compliment and praise to the others should be declination

中国人的传统美德是谦虚谨慎，对别人的恭维和夸奖应是推辞。如

We bought this house on the never-never.

我们以分期付款的方式买下这座房子。