查询词典 spatial change

Shule River project area is located in northwest China\'s Gansu province,Hexi Corridor,which is the largest agricultural crop production base of Gansu province and typically arid and semi-arid areas. There are characteristics such as scarce rainfall,the temporal and spatial distribution inequality,strong evaporation,fragile ecological environment,the limited quantity of surface water. Agriculture,the people\'s living and ecological environment are significantly dependent on the groundwater. Based on the collection and processing of regional hydrological and geological data and the groundwater monitoring data,using the numerical simulation,geostatistics theory and multi-objective evolutionary algorithm,this paper studied the monitoring and evaluation of groundwater resources from the three aspects: groundwater numerical simulation and prediction,groundwater spatial variability and distribution and optimization modeling and sloving of groundwater monitoring network. The main work and research lies:(1) Using Yumen-Tashi basin,Anxi-Dunhuang basin and Huahai basin as study area,this paper used modflow model to simulate groundwater flow of three areas.

本文在收集和整理项目区水文地质数据以及地下水监测数据的基础上，基于数值模拟、地统计学理论及多目标进化算法，从地下水数值模拟与预测、地下水空间变异与分布特征分析以及地下水监测网优化建模与求解三个方面展开了对项目区地下水资源监测与评价的研究，主要研究工作如下：(1)以项目区内的玉门-踏实盆地、安西-敦煌盆地和花海盆地为研究区域，在《河西走廊项目中期计划调整报告》规划条件下，基于modflow模型对地下水水流进行数值模拟，计算并生成了三个区域2007-2030年地下水埋深预测数据以及等值图。

Composite layer topology expands the sense of space-time composition to spatial topology, and proves that the static spatial topology representation capability of composite layer topology is as strong as that of static layer topology.

复合图层拓扑扩展了时空复合对空间拓扑的意义，并证明复合图层拓扑的静态空间拓扑表达能力和静态图层拓扑一样强。

The fractal theory is discussed used in urban spatial morphology. From the psychologic cognition mechanism aspect, according to cognitive superincumbent process, the indexes system and research frame for quantitatively descriptive urban spatial morphology are constructed.

基于以上研究，笔者探讨了网络分析和特征值分析中的主要指标，即对线状要素描述的主要指标有：方向均值、关联矩阵、邻接矩阵、回路数H、β指数、α指数、γ指数等，对面状要素描述的指标有：圆形率、紧凑度、形状系数、标准面积指数、放射状指数等；并探讨了分形理论在城市空间形态研究中的应用，在此基础上，从心理学的认知机理出发，按照自上而下的认知过程构建了定量描述城市空间形态的指标体系和研究框架。

It very important to syncretize the community ecology and landscape ecology by the spatial distribution and comparisons in scale. The result show bird habitat selection is affected by the temporal and spatial scale and heterogeneity.

生物分布的空间异质性和尺度的比较研究是群落生态学和景观生态学交叉研究的重要切入点，本研究认为，鸟类的生境选择研究应该是时间、空间尺度以及异质性研究的综合。

Regional spatial layout is a dynamic process of regional spatial structure, i.e. economic and non-economic factors are territorially collocated with the guide of strategic plans.

区域空间布局是区域空间结构的动态调整过程，即在战略性规划的指导下，对各类经济要素和非经济要素的地域配置过程。

Spatial query language ; topological relationship ; complex spatial feature ; completeness ; exclusiveness

空间查询语言；拓扑关系；复杂空间对象；完备性；互斥性

Based on the description of uncertain linear and area objects, intersection degrees for parts of uncertain linear and area objects are represented quantitatively. By calculating correlation degrees between spatial vectors composed of these measurement units and spatial relation vectors determined by 9-intersection model, a new model is presented for topological relations between uncertain linear objects and fuzzy region, which could distinguish the type of topological relations through quantitative analysis method.

在时不确定线状目标和面状目标进行描述的基础上，对不确定线状目标与面状目标各组成部分之间的相交程度进行了定量表达，通过计算这些度量组成的空间向量与9-交集模型确定的空间关系向量之间的相关度，提出了一种不确定线状目标和面状目标之间拓扑关系的描述模型，通过定量的方法来对其空间拓扑关系进行判别。

Based on Needs analysis and according to the characteristics of the data for rubber tree precise fertilization decision-making, this paper detailed to analysis and design the spatial data and attribute data of rubber tree precise fertilization of state farm, analysised the spatial data and attribute data of rubber tree precise fertilization decision-making and the database structure, then constrcted the corresponding database.

通过需求分析，根据橡胶树精准施肥决策所需数据的特点，对国营农场橡胶树精准施肥空间数据和属性数据进行详细的分析与设计，对橡胶树精准施肥决策需要的空间数据和属性数据进行分析和数据库结构进行设计，并构建了相应数据库。

Multiple antenna arrays are often used to overcome the effect of channel fading which is caused by multipath interference. In chapters 4 and 5 ,we derive spatial correlation equations of ULA ,UCA and CRA for two types of angular spread distributions (uniform distribution and truncated Gaussian distribution).We also compare the difference between these antenna arrays by showing the bit error rate simulation results and discuss the relationship between BER and spatial correlation. In a multi-user mobile radio environment , we present simulation results to show that adaptive MBER algorithms have better performance than the traditional MMSE algorithm.

多天线阵列常被用来克服多重路径干扰导致通道衰减的影响，我们对各种天线阵列架构进行比较，在第四、五章中推导出ULA、UCA与CRA个别对两种角度扩散机率密度分布的空间相关性函数，由实际实验模拟的位元错误率图形比较天线阵列间的差异，并讨论位元错误率与空间相关性之关连，在多用户端行动通讯环境下，我们也由模拟验证可适性MBER演算法，会比传统MMSE准则有更好的效果。

Based on the convergence theory in the documents about economic growth, the thesis makes the matrix, one kind of the methods about Spatial Econometrics, according to the spatial geographical ubiety between provinces in order to analyses empirically the difference about the economic growth between areas in the mainland since the open-door policy, especially the year 1990 from which the economy of China grows rapidly.

本文以经济增长文献中有关收敛性理论为基础，运用根据省际间的空间地理位置关系建立空间关系矩阵的空间计量经济学方法，对中国改革开发以来，特别是经济高速发展的1990年以来中国大陆地区的地区经济增长差异进行实证分析。

This matter overthrew all basises I learned from Sunday school .

这件事把我从周日学校学到的所有道理都颠覆了。

It's one of the cruel ironies of aging: if you want to remember your favorite restaurants, the less you should eat at them.

这是一个老化的残酷讽刺：如果你想记住你最喜欢的餐馆，你应该更少吃到它们。