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动态度
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  dynamic degree
     The Results show that the comprehensive dynamic degree of land use is 0.47% in the studied area from 1990 to 2001. The land use intensity increased from 228.32 to 232.50 within 11 years, and it decreases spatially from XiaoJingyu Township, the core urban fringe to the outer fringe of the studied area.
     结果表明:11年间全区综合土地利用动态度达0.47%; 土地利用程度由1990年的228.32增加到2001年的232.50,并由位于城乡结合部核心区域的小井峪乡向外围逐渐降低;
短句来源
     Amendatory comprehensive land use dynamic degree model and its application——a case study of impact of road on LUCC in Xishuangbanna
     正向综合土地利用动态度模型及其应用——以西双版纳公路对土地利用的影响为例
短句来源
     1. Some mathematic models are used to research the spatio-temporal change of land use and land cover from 1995 to 2000 in Qingdao , such as land use dynamic degree model, land use degree spatio-temporal evolution model and land use type transferring matrix model.
     1.结合土地利用动态度模型、土地利用程度时空演变模型、土地利用类型转换矩阵模型等来研究青岛市1995~2000年土地利用/土地覆被的时空演变。
短句来源
     3. Landscape ecology quantitive method, land use dynamic degree, land use transition matrix are applied to study Beijing, Haikou landscape structure change during rapid urbnization process.
     3.北京市和海口市是全国城镇扩展最快的地区之一,也是具有典型意义的地区。 利用景观生态学与土地利用动态度、土地利用转移矩阵等模型相结合以北京市与海口市为例分析了城镇化过程中景观结构的动态变化。
短句来源
     By introducing the landscape pattern indexex of dynamic degree of land use and land use cover change,spatial pattern change is analyzed from 1996 to 2004 in Zhangye city.
     引进土地利用的动态度和土地利用覆盖的景观格局指数,重点揭示1996~2004年张掖市土地利用类型的转化程度、时空差异及土地利用/覆盖的空间格局变化。
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  “动态度”译为未确定词的双语例句
     2. During 1986~2001 year, comprehensive trends, LUCC Rt is 1.48% in Yellow River Delta, but greaterthan in earlier stage (1986~1996 ) on later stage .
     2.1986~2001 年期间,黄河三角洲LUCC 综合动态度Rt 为1.48%,但前期(1986~1996年)大于后期。
短句来源
     Using the data of land use from 1996 to 2004 in nanàn chongqing,analyzing the dynamic trend and degree of land use.
     利用重庆市南岸区1996~2004年土地利用现状年度变更调查数据,分析其土地利用动态度、土地利用程度的变化情况。
短句来源
     Through interpretation,analysis and statistic to the four temporal TM remote sensing images in 1986,1989,1993 and 1997 and the two temporal ETM+ remote sensing images in 2001 and 2003 as well as the SPOT remote sensing image in 2004,the spatial-temporal evolution patterns of beach cultivation are analyzed with the single land use dynamic index,landscape fragmentation and the model on changes of gravity center in Xiamen in recent two decades.
     对此,利用1986、1989、1993、1997年TM遥感影像和2001、2003年ETM+遥感影像以及2004年SPOT遥感影像,用单一土地利用动态度、景观破碎度和重心迁移模型,对近20年来厦门市滩涂养殖的时空演变过程进行了分析。
短句来源
     The results are:(1)The LUCC condition has changed obviously: ①The area of woodland and residential - industrial quarter increased 2791.71 and 1290.55 ha respectively, while the area of grassland reduced 4014.18 ha;
     (1) 土地利用状况发生了明显变化:①林地面积增加2791.71ha,城乡工矿居民用地面积增加1290.55ha,草地面积减少4014.18ha:②土地利用总体变化速度较快,综合土地利用动态度为0.77%;
短句来源
     The results show that the synthetic is 2.07%;
     结果表明:(1)各类土地利用类型综合动态度为2.07%;
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  相似匹配句对
     The dynamic degree of the cultivated land was 2.14%, which was the highest among those of the 8 land utilization types.
     耕地态度最高,为2.14%。
短句来源
     The rate of change dynamic of cultivated land is very high, which is -5.4%.
     耕地态度大,达到-5.1%;
短句来源
     Attitude
     态度(英文)
短句来源
     The Style of Living
     生活的态度
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     Analysis on dynamic filtration
     失水分析
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  dynamic degree
By this method we can evaluate the numerical model and dynamic degree model for calculating land-use change rates.
      
  dynamic velocity
Here Ajk=const; uτ is the dynamic velocity; and f is the frequency.
      
A calculation procedure based on the value of average dynamic velocity of the mixture is suggested for the description of the process of fluidization in a two-phase medium.
      
The resistance coefficient is derived from the hydrodynamic equations for multiphase liquids by using an empirical relationship for the dynamic velocity and general semiempirical considerations.
      
In free convection, there is no dynamic velocity scale; the sensible and latent heat fluxes, therefore, scale directly with the temperature and humidity structure parameters Ct2 and Cq2.
      
On the basis of these data, distributions of the shear rate, shear stress, dynamic velocity, friction coefficient and energy dissipated were evaluated.
      
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  degree of dynamic
A new formula is used to define the exact degree of dynamic land use.
      
The comprehensive degree of dynamic land use is 2.25, and the degree of dynamic land use of built-up land is the highest, followed by cultivated land.
      
Thus, R exhibited a higher degree of dynamic variability or a broader range of control of the spontaneous vigilance fluctuation (dynamic lability) than NR (dynamic rigidity).
      
The degree of dynamic influence of surface waves scales with wavelength.
      
For a sufficiently large degree of dynamic decoupling, the return trails exhibit pronounced volatility clustering.
      
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The DCB model is an universal model often used in Dynamic FractureMechanics. Particularly, it has found wide application in experimental researchand numerical analysis of the dynamic crack propagation and arrest. To theauthor's best knowledge, there is no paper available in the open literature con-cerning dynamic crack initiation using this model and the dynamic response ofthis model under the step loading. The contributions of this paper are as follows: (1) The dynamic stress intensity factor of DCB model with...

The DCB model is an universal model often used in Dynamic FractureMechanics. Particularly, it has found wide application in experimental researchand numerical analysis of the dynamic crack propagation and arrest. To theauthor's best knowledge, there is no paper available in the open literature con-cerning dynamic crack initiation using this model and the dynamic response ofthis model under the step loading. The contributions of this paper are as follows: (1) The dynamic stress intensity factor of DCB model with differentcrack lengths are calculated under the step loading by using the distorted iso-parametric element method. (2) The pin displacement, the dynamic stress intensity factor and dynamicenergy release rate are formulated approximately. (3) A simple and available method to determine the initial dynamicfracture toughness by using the DCB model is given. (4) This paper points out that the bending criterion of crack propagationgiven by Bilek and Burns [9] holds true only if the crack length is much grea-ter than the height of DCB model.

本文用畸变等参元法计算了在阶跃载荷作用下,带中心穿透裂纹的平板和双悬臂梁(DCB)模型的动态响应。用位移法计算了动态度力强度因子。对于DCB模型,给出了销钉位移、动能、势能、外力功、动态度力强度因子和动态能量释放率的近似表达式。同时.文中给出了确定动态断裂韧性K_(ID)(σ)的简单可行的方法。此外,对于Bilek和Burns的裂纹扩展的弯矩判据进行了论证。指出:此判据只适应于长裂纹情况。通过对于板的计算结果表明:与Chen的有限差分结果和Aberson的有限元结果基本一致。这就证明了本文所提出的计算方法和计算机程序的有效性。

In China, a country with great discrepancy between dense population, rapideconomic increase and the fragile environmenL the study on the modem process ofland-use change is significantly important for better understanding land-use changeand environmental management for sustainable development. Since the 1960' s, thedevelopment of remote sensing has put researches about our planet into a brand-newstage. With the support of remote sensing techniques, which make possible the dataacqtusihon at completed spahal and...

In China, a country with great discrepancy between dense population, rapideconomic increase and the fragile environmenL the study on the modem process ofland-use change is significantly important for better understanding land-use changeand environmental management for sustainable development. Since the 1960' s, thedevelopment of remote sensing has put researches about our planet into a brand-newstage. With the support of remote sensing techniques, which make possible the dataacqtusihon at completed spahal and temporal series, the spahal feature of the Earth'ssurface and its evolvement modern process can be analyzed in quanhtahve andpararneterized methods. And it enables the study on historical construchon of landuse /cover change over temporal scales. Understanding the mechanisms which operated in the past to determine the main land-use/cover change is a crucial input to analyzing the current changes and predichng future ones. From this point, acompleted hme series spahal data platform derived from remotely sensed data isindispensable because on the basis of thes platform. Then effective studies on themodern process of land-use change, including the temporal feature and spahal featureof this process, can be approached by means of process analysis and quantitativemodeling. Trying to explore and develop the methodology for study on land-use changemodern process, this research focused on the analysis of land-use change in Chinausing remote sensing data platforms and GIS tools. The whole work included threeparts as followed: (1) develop the data platform of land-use change modern processin China. The land-use change informahons can be derived by historical data, e.g.NOAA / AVHRR for most recent years, TM and Mss images for the past 30 years,aero photoes for the 1960' s, and the recovery of thematic survey records for the1950's or earlier. Then land-use change dynamic databases at different spahal andtemporal scales were established using these informahon and the historicalreconstrUchon of land-use change modern process can be achieved; (2) Study on thebasic rules of regional land-use change modern process in China, the land-use changeinformation extraction and spahal feature modeling. In this part of work, two newconcepts, the land-use intensity comprehensive index and land-use dynamic degree,are introduced to describe land-use changes quanhtatively, (3) Feature analysis of land-use change in China in the past two decades. On the basis of the first two steps,case studies on land-use dynarnics and feature analysis were Performed in Changjiang River Delta, Zhujiang Delta and Bohai Bay areas using TM imageries and GISspatial analysis tools. Analysis results showed that in the past fifteen years, theseareas experienced land-use changes such as farmland dimination, city expansion andpattem alteration in forest. Scientific explanation on these changes is derived from thecomprehensive analysis (e.g.correlation and spatial overlay) of land-use dynamics andthe corresponding social-economic data. In addition, by means of environmentalregionalization and multi-level sampling technique, sampling analysis on land-useintensity change and Iand use dynamic degree was applied in different land-useregions to reflect the spatial and temporal feature of landuse dynamics of the wholecountry since the 1980' s. The result revealed that land-use change degree varies inthe country. Coastal area of South China was the "severe change" region, where thehighest annual change rate is greater than 5%. In the mid-and-down stream of Changjiang fover, coastal area as well as the suburb of metropolis in East China, land-usechange is "fast' with the annual rate of 0.3%~ 1.0%. While in agricultural region,such as North China, Sichuan Basin, and regions that are far away from big cities inAnd Changiiang hiver and Northeast Plain, land-use change is "slow" with a annualrate ranging from 0.1% to 0.3%. The land-use change is "very slow" in the Plateauarea of West China and the pastllring area of Northwest China, which is characterizedby the poor economic developme

为实现土地利用变化现代过程的卫星遥感研究,须建立时间序列完整的空间型遥感数据平台。在此基础上,通过建模分析,可以有效地研究土地利用变化的现代过程,其中包括土地利用变化的时间动态特征和空间动态特征。为探讨基于卫星遥感数据的中国土地利用变化现代过程研究的方法论,采用陆地卫星TM分层抽样方法,对全国土地利用类型区域组合、土地利用程度变化和土地利用动态度进行了分析。

Land is the basis of human's life and is changed by human's activities.Hence population is one of the main factors influencing land use and land cover,and plays a very important role in Global Change Study.This paper analyses the relationships between population and land use/land cover change.Based upon this the land use Degree to Population Model and the Land use Dynamic Degree to Population Model are developed.These models can be used not only in analysing the relationship between population and land use/land...

Land is the basis of human's life and is changed by human's activities.Hence population is one of the main factors influencing land use and land cover,and plays a very important role in Global Change Study.This paper analyses the relationships between population and land use/land cover change.Based upon this the land use Degree to Population Model and the Land use Dynamic Degree to Population Model are developed.These models can be used not only in analysing the relationship between population and land use/land cover but also in forecasting future land use/land cover change.

土地提供了人类赖以生存的基本物质条件 ,而人类通过对土地资源的改造利用 ,从而改变其生存环境。因此 ,人口数量的多少直接影响到土地利用 /土地覆盖的变化。故在全球变化和土地利用 /土地覆盖变化研究中 ,人口因素常被作为综合参数来反映人类活动在土地利用 /土地覆盖变化中的贡献。本文通过对土地利用 /土地覆盖变化中人口与土地利用程度指数及人口与土地利用动态度之间相互关系的分析 ,建立了人口与土地利用 /土地覆盖变化之间的定量模型。这些模型不仅适用于对现阶段人口条件下的土地利用 /土地覆盖变化与人口之间关系的分析 ,同时也可用于对未来土地利用变化的预测 ,对土地利用 /土地覆盖变化研究具有积极的意义

 
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