查询词典 spatial point

Having introduced a set of dimensionless parameters, the spatial distributive function of the induced electric field is made dimensionless and is applied to the computation and computer simulation of spatial distribution of electric field induced by a circular coil within half-infinite space.

在确定了一些无量纲参数后，对感应电场的分布函数进行无量纲化，并用于计算圆形线圈在半无穷空间感应电场的计算及其分布的计算机仿真。

Having introduced a set of dimensionless parameters, the spatial distributive function of the magnetic field and the induced electric field is made dimensionless and is applied to the computation and computer simulation of spatial distribution of the magnetic field and the electric field induced by a circular coil and a 8-shaped coil based on MATLAB.

在确定了一些无量纲参数后，对磁场及感应电场的分布函数进行无量纲化，并用于基于MATLAB环境下圆形、8字形线圈磁场及产生的感应电场的计算及其分布的计算机仿真。

1Niche construction can lead to stable coexistence of diverse genotypes in spatially structured population, which supports a stable polymorphism even without heterozygote superiority.(2)With habitat deterioration, niche construction accelerates the formation of steady polymorphism and hence impedes the harmful influences of environment on the population, which might embody a life-history strategy of organism under the unfavorable environment.(3)Niche construction results in the coexistence with alternative polymorphism through genotype-environment feedback and limited gene flow.(4)The niche-constructing organism is an active force to alter its environment and hence the direction of natural selection in order to better survival.(5)Spatial dynamics and distribution pattern of metapopulation are profoundly influenced by time-lagged niche construction.(6)Metapopulation size can reach a fixed level in the recency effect and equal weighting of time lag but is statistical stability in primacy effect, which implies the primacy effect is most remarkable.(7)The increment in the relative weightingof each generation\' niche construction and the length of time lag are significant factors for system destabilization.(8)Moderate capacity of positive niche construction benefits the metapopulation persistence.(9)The narrowing of niche breadth can decrease the metapopulation size and thereby increase the extinction risk.(10)The coupled function of time lag and niche construction make the system oscillation and generate the spiral wave, spiral-broken and circular wave in heterogeneous habitat.The spatial distributions of metapopulation and resource content are complementary due to a phase lag of their both frequencies.(12)Metapopulation persistence with niche construction depends not only on the balance between colonization and extinction, but also on the balance between the ability of niche construction and natural dissipation of habitat.(13)Metapopula-tion can survive under certain condition when the percent of suitable patches in habitat is lower than the ration of extinction to colonization.(14)Two thresholds exist in the process of transition of habitat quality dynamics from unsuitable to suitable, which include the intensity of niche construction and the initial condition of system.(15)Metapopulation size is positive correlated with the ability of positive niche construction, which means that organism or population who has strongly positive influences on their environment plays an important role to maintain the available habitat.

通过上述几个方面的研究，主要得出以下15条结论：(1)生态位构建可使空间结构种群，甚至是在没有杂合子优势的条件下，形成多种可能的稳定基因型分布模式；(2)随着环境的破坏与恶化，种群的生态位构建作用加速其较早形成稳定多态以阻碍环境对种群的不利影响，解释了有机体在不利环境下的一种生活史对策；(3)生态位构建作用通过基因型—环境反馈机制及有限的基因交流导致基因型多态的稳定共存；(4)有机体的生态位构建作用是一种积极的动力改变环境进而改变其自然选择的方向；(5)生态位构建的时滞作用对集合种群动态和空间分布产生深刻影响；(6)集合种群大小在时滞的崭新效应和等权重效应下达到一固定值，而在首位效应下达到统计稳定，表明首位效应的影响最显著；(7)首位效应下生态位构建相对权重的增量和时滞的长度是影响系统不稳定性动态的关键因素；(8)适中的生态位构建强度有利于集合种群的续存；(9)生态位宽度变窄会减少集合种群的数量从而增加其灭绝风险；(10)时滞和生态位构建的双重作用使系统产生周期振荡，并在异质性环境中产生稳定的螺旋波，破碎的螺旋波和环形波三种分布模式；(11)集合种群与资源含量的空间分布因为相滞而互补；(12)具有生态位构建的集合种群续存不仅取决于侵占率与灭绝率之间的平衡，而且依赖于生态位构建能力同其生境的自然消耗速率之间的妥协；(13)当生境中适合侵占的斑块比例小于其侵占率与灭绝率之比时，生态位构建作用促使集合种群在一定条件下续存：(14)生境斑块的状态从不适合到适合转变过程中存在生态位构建强度和系统初始条件这两个阈值；(15)集合种群的大小同正生态位构建能力正相关，意味着对环境具有较强正作用的有机体对维持有效生境起积极作用。

The inner spatial section area of the unit cell receptor is larger than the inner spatial section area of the circulator.

单元电池接受器的内部空隙截面面积大于循环器的内部空隙截面面积。

The function design of system includes writing down amendment and pretreatment about spatial database and attribute database. This system provides common and basic functions of GIS. Besides, we can make out the topographical maps, planimetric maps and skiagraph , structure objects of highway construction of design and can inquire two-way between spatial information and attribute information. The system apply Earned Value Method to perform the correlative property to classification statistic.

系统功能设计包括空间数据库和属性数据库的录入、修改以及预处理；系统还提供了一般GIS系统应具备的基本功能，并在此基础上进行涵盖公路设计施工的地形图、平纵缩图、构造物等图形信息与属性信息的双向查询，并运用挣值法等对相关属性进行分类统计以供有关公路工程项目的各方使用。

Based on mathematical morphology, a new algorithm of 3D spatial clustering was presented, which clustered spatial objects by closure operation.

提出了一个基于数学形态学的三维空间聚类算法。

After analyzing the basic information of the ecological engineering construction, the spatial and temporal scale, and monitoring index, the 1m IKONOS image and 2.5m SPOT5 image were introdueced as data sources, the methodology of RPC modeling and GCP optimitiaztion as modification to the interpretation, the AHP used in determining combination of multi-light specrum and the whole band wave, the virtue reality technique monitoring the classification and recognation, variable cluster allocation coeffiecents and its adaptation in spatial and imaged attributs in the research on water and siol conservation subtracting the least pathches of the area. The final stage is to subtract the information via human and computer interactive to interpret and monitor the classification in the study assisted with GPS, field identification and construction supervision.

在对研究样区水土保持生态建设情况和监测尺度及监测指标分析的基础上，选择1m分辨率的IKONOS影像和2.5m分辨率的SPOT5影像为监测遥感数据源；采用"RPC模型+GCP优化"方法进行高分辨率遥感影像正射纠正；用主成分分析法进行遥感影像全色波段与多光谱图像融合；用虚拟现实技术进行高分辨率遥感影像监督分类模板定义研究，用不同大不的聚类处理参数并在研究水土保持生态建设措施的空间特征和影像特征的基础上，确定提取水土保持生态建设信息的最小图斑参数值；最后用全数字人机交互解译和监督分类提取研究样区水土保持生态建设信息，并结合GPS现场验证和工程监理成果对监测结果进行分析评价。

With the case study of the old town of Lijiang, the World Culture Heritage city, the changes of population and spatial distribution brought by the tourism commerce development are studied from the perspectives of shop types, merchandise categories, operator composition and spatial distribution, and the potential impact on cultural heritage sites is analyzed.

以世界文化遗产城市丽江古城为例，从店铺类型、商品种类、经营者构成以及空间分布等角度考察旅游商业发展导致的人口和空间格局的变化，分析其对文化遗产地造成的潜在影响。

One research institute has integrated GEN2000 into its infrared simulating package, and computed spatial distribution of infrared properties from one real high-speeded engine exhaust system, the results were compared with experimental data. Through comparation we can see: relative error between computational and experimental results is less than 30%, the spatial distribution of infrared properties is basically accord.

某研究所将本文设计的计算程序GEN2000合成到其红外模拟软件包中，计算了某型实际发动机高速排气系统红外辐射特性的空间分布，并与发动机试车实测数据进行了分析比较，结果表明：计算结果与实测结果的最大相对误差不超过30%，红外辐射的空间分布基本一致。

Ecological infrastructure is the basic guarantee for regional ecosystem safety and the rigid bottom limit for regional environmental bearing capacity. For regional spatial planning, whose task is to arrange urban space, ecological space and agricultural space concordantly, and the purpose of SP is to create a harmonious relationship between nature and human and at the same time build a spatial order for eco-system sustainable development.

生态基础设施是区域生态安全的基本保障和区域环境承载的刚性底限，区域空间规划是对区域城市空间、生态空间及农业空间的统筹性安排，其目的是创造一种人地和谐、生态环境可持续的空间秩序。

Molecular Distillation is a kind of high vacuum distillation method, which is suitable for the separation of high boiling, heat sensitivity and viscidity products.

分子蒸馏技术是一种在高真空条件下进行的连续蒸馏过程，适合于分离高沸点、热敏性及具有生物活性的混合物。

They are to the Noughties what yuppies were to the Eighties .

那在六十年代是时髦的，但在八十年代肯定是过时了