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等级扩散
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  相似匹配句对
     Nonlinear Diffusion
     非线性扩散
短句来源
     THE DEFINITION OF NATURAL DISASTER AND DISASTER GRADE SCALE
     自然灾害的概念、等级
短句来源
     Discussion on "Grade" of architectonic structure
     浅谈建筑结构“等级
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     Diffuse Phase Transition of Ferroelectrics
     铁电体的扩散相变
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  contagious diffusion
In addition, a simple contagious diffusion technique is devoted to improving performance for polygonal meshes traversal.
      
The method distinguishes between contagious diffusion betweenadjoining units and hierarchical diffusion that spreads broadly throughcommonly shared influences.
      
Contagious diffusion between neighboring censustracts is evident only during the year of peak growth in total homicides,when high local rates of youth-gang homicides are followed by significantincreases in neighboring youth- nongang rates.
      
The growth of the network is modelled as a process of contagious diffusion where transport densities of adjacent cells are used as predictor variables on a lagged basis.
      
  hierarchical diffusion
The method distinguishes between contagious diffusion betweenadjoining units and hierarchical diffusion that spreads broadly throughcommonly shared influences.
      
Hierarchical diffusion and order form Obviously, in the hierarchical order form, the junior agents will follow the strategy of the superior agents.
      
The flying geese model of vertical production networks and hierarchical diffusion of production is rapidly being displaced.
      
The hierarchical diffusion is popular in the diffusion of knowledge, culture, and so on in the society.
      


The structure of urban system is the reflection of urban size,function and network. Primary city location, function structure composed of the complexity,individualty and commonality,and the spatial style of "the cross", are the characteristic of urban system in Gansu Province. So its developing ways are:perfect the hierarchy-diffusion mechanism, optimize the function and construct the network by the territorisl nature of "the Group-Axis" one another.

城市体系结构是等级规模、职能和网络的综合反映。甘肃省城市体系结构具有极端首位分布;“综合型”、“个性型”和“普通型”的职能组合以及“十字型”的网络结构特征。因而,城市体系的发展方向是:一方面要完善等级扩散机制;另一方面要优化职能,按“团块-轴状”的地域特色组织空间结构。

This paper reviewed literature on relevant studies and summarized two theories on locational evolution of large companies: contagious diffusion and hierarchy diffusion. Some company cases were then provided to test the general trends. Results shown that China's special cultural and political background prevents companies from following the general rules. Based on China's situations, the authors suggested a new theory: cannel diffusion in locational evolution of large company expansion.

根据国际学术界相关文献 ,总结出大公司空间扩张中 ,具有接触扩散和等级扩散两规律。但以中国为例的实例研究表明 ,中国特殊的体制和文化背景 ,影响公司扩张 ,除呈现这些规律外 ,作者提出了通道扩张的假说。

The outbreak of SARS and its rapid diffusion bring so much influence to our social life and economy, however it gave us one scarce chance to observe and analyze its geography diffusion, to earn some experience for SARS and other epidemical diseases. Perhaps without any hesitation, we may infer its diffusion is obviously a geographical process, which means the diffusion in geographical space. During the first process of its diffusion, hierarchical diffusion dominated, and followed by some hindrance in its diffusion,...

The outbreak of SARS and its rapid diffusion bring so much influence to our social life and economy, however it gave us one scarce chance to observe and analyze its geography diffusion, to earn some experience for SARS and other epidemical diseases. Perhaps without any hesitation, we may infer its diffusion is obviously a geographical process, which means the diffusion in geographical space. During the first process of its diffusion, hierarchical diffusion dominated, and followed by some hindrance in its diffusion, which marked the second process. We noticed that the first process gave great chances to the disease diffusion, and it spread virus so rapidly that many lives were taken away, and also one foundation was established for its following loafing. It spread through crowds, space (such as from Guangdong to Beijing) and time. Some measures such as medical treatment, isolation and defendable measure were taken peremptorily after scientists finding its severity. And the diffusion of SARS was restrained by hindrance. This article describes the diffusion manner of the epidemic disease and the forming of geographical situation in China (the main locus are Guangzhou and Beijing, and capital city of each province is the next emphasis space). At the same time, the distribution made us worried more, for the article points out that centralization may aggravate the negative effect. Therefore, this article notices the geographical condition where havent discovered SARS case, and considers the existing geographical hindrance, just like geographical distance (distance attenuation), geographical environment (something like ultraviolet radiation may help prevent it), characteristics of industry (industries which can cause numerous migrant population may bring the disease easily, such as finance, commerce, tourism and education, etc). We also noticed some occasions (small mass of population) might prevent it. Through analyzing these hindrances, the article offered the countermeasures against the diffusion of epidemic disease. We may take out the patients from the central cities, and some geography environment remind us its function to accept the patients such as Qingzang Plateau in national level. Its non hindrance diffusion reminds us the importance of preventing it in rural areas and some medical centers in a county need establishing.

SARS疫情在我国的迅速传播已经对我国的社会和经济生活造成了重大的影响 ,也为我们观察和分析地理扩散提供了难得的机会。SARS的扩散显然是一种地理过程 ,这个过程的第一个特征是以等级扩散为发展方式的 ,第二个特征是必然在扩散中遇到障碍。第一个特征的存在使疫情在一段时间里在我国得以迅速的蔓延 ,但是当采取各种医疗、隔离和防护措施后 ,SARS的扩散在出现障碍的条件下受到抑制。文章描述了疫情扩散的方式 ,在我国形成的地理格局 (以广东和北京为源地 ) ,认为这个地理格局的形成与我国流动人口的分布、人口流动的条件有关。同时指出 ,在疫情扩散的地理格局中 ,在中心城市形成的高度集中是一种令人担忧的现象。因为这样的集中已经对这些中心城市的包括“医疗中心”在内的行政、经济、交通等核心地的功能产生严重影响。为此 ,文章注意到我国一些没有发现疫情的地区的地理条件 ,认为存在着如地理距离 (距离衰减 )、地理环境、产业特征等地理障碍。通过对这些障碍的分析 ,文章最后提出了防治疫情及其继续扩散的措施

 
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