局域效应

词组短语

local effect

与局域效应相关的网络例句 [注：此内容来源于网络，仅供参考]

Under the condition of large accelerating parameter,the system can showthe effect of delocalization.

在大的加速参数条件下，可能存在去局域效应。

Based on SEM observations of eroded surface as well as simulative measurements of plough-cutting resistant capacity W and localized surface layer elasticity h for the tested alloys, an attempt has been made to discuss the failure mechanism and factors characterizing the resistance.

结果表明，Fe-25Mn-6Si-7Cr形状记忆合金在含沙多相流中的失效机制主要是泥沙犁削，其损伤抗力因高的局域弹性和高的犁削抗力而优于不锈钢0Cr13Ni5Mo，局域弹性高是其损伤破坏速度效应低和空蚀与泥沙冲刷磨损交互作用小的根本原因。

In the second part of the work,quantum interference induced weak-localizationeffects as well aselectron-electroninteraction effects were investigated through magnetotransport measurementsfor highly doped n-ZnSe∶Clat metallic side of metal-insulator transition(MITgrown by MBE,withmagnetic fieldfrom 0 to 1T and temperaturefrom 0.3K to 30K.

第二部分对一系列分子束外延生长的高掺杂n-ZnSe∶Cl(位于金属绝缘体转变的金属一侧)在弱磁场(0到1T)以及低温(0.35K到30K)下进行了磁输运研究，以研究Anderson局域化，由于量子干涉效应引起的弱局域化效应以及无序存在时电子-电子相互作用效应。在所有样品中观察到了负磁阻并获得了其对温度，磁场以及电子浓度的依赖关系。

So in this work, we focused no the following aspects: 1 The ecological effect of ephemeral resource on the rodent community; 2 The ecological isolation and coexistence mechanism for the sympatric species; 3 The effect of ecological process in a regional scale on the specie richness to investigate the community Patterns and limitation Mechanism of the desert rodents in this region, the main results and conclusions were as follows

为此，本工作立足于以下方面：（1）限制性资源对荒漠啮齿类动物群落的生态效应；（2）同域物种的生态分离与共存机制；（3）局域尺度的群落过程对区域物种丰富度的影响；对该地区的荒漠啮齿动物群落格局及其相关的制约机制进行了研究。主要研究结果和结论如下

Both the Allee effect and the Allee-like effect are important for ecology and conservation.

不论局域种群的Allee效应还是集合种群的似Allee效应，对生态学的各个方面和保护生物学都有深刻的影响。

It has been shown that there are Allee-like effects at metapopulation level, which is similar to that of Allee effects at the local population level.

已有的研究表明，在集合种群水平上，也存在类似于局域种群Allee效应的似Allee效应(Allee-like effect)。

Although there have been a great many papers on the Allee effect, they have mainly referred to only local populations and have not dealt with the relationship between the two and their impacts on the stability of ecological systems.

然而，虽然近年来关于Allee效应的研究文献非常多，但对于集合种群水平上的似Allee效应与局域种群水平上的Allee效应之间的关系，以及二者对生态学系统稳定性的影响的研究还相当缺乏。

In this paper, I have constructed models for local population and metapopulation dynamics. Then by mathematical analysis and numerical simulation, I focus my studies on the relation between the Allee-like effects at the metapopulation level and the Allee effects at the local population level and their impacts on the stability of ecological systems.

在本文中，通过建立局域种群和集合种群的理论模型，把局域种群动态和集合种群动态结合起来，用数学分析和数值模拟分析的方法研究了集合种群水平上的似Allee效应与局域种群的Allee效应之间的关系以及它们对生态学系统稳定性的影响，并对含Allee效应的物种的自然保护提供了理论依据。

To make a comprehensive view of metapopulation researches, we folly analyze and summarize the present concepts, theories and models of metapopulation in this paper, which primarily includes the dynamical models and simulation approaches of single and competitive metapopulations. Based on the Levin's patch occupant model, the center framework of metapopulation researches, primary principles and mechanisms are discussed. First, Levins rule: the fraction of empty patch will remain constant with habitat destruction as long as metapopulation survives. This rule implies that empty patches have determinant effects on persistence and conservation. Second. Allee effect of metapopulation is incurred by establishing difficulties and dispersal costs, which is important to the studies of reserve area and the minimum available metapopulation size. Third, we analyze the rescue effect that immigrants can reduce the extinction risk of the presented local population. Rescue effect can leads to the improvement of metapopulation sustainability and the decrease of fraction of empty patches. Fourth, the coexistence mechanism of two competing metapopulation is discussed, which suggests that competition-colonization trade off may be prevalent in competing systems. Finally, extinction debt ob tamed from coexistence mechanism is given, which depicts the lost of species richness in the future for the current habitat destruction. After theoretical discussion, we present two popular simulated approaches in metapopulations: probability transition model and stochastic process model.

为了能总观集合种群进展的全局并开展进一步的工作，首先对集合种群的已有概念、理论和模型做了全面的分析和总结；其次对集合种群的发展和概念进行了探讨，以集合种群模型的中心框架：Levins的斑块占据模型为基础，展开对其它原理、效应和机制的探讨；主要包括了Levins原理，即当生境进到破坏时，空斑块比例在集合种群灭绝前保持不变，然后还分析了Allee效应（集合种群的Allee效应主要是由于建群困难和扩散损失造成的）；第三，分析了援救效应：迁人个体可以降低斑块中现有局域种群的灭绝风险，援救效应会增强集合种群的生存力，使空斑块比例下降第四，探讨了两竞争集合种群的共存机制，即竞争－侵占妥协，其共存机制为空间生境中物种共存提供了有力的理论解释。

In spatial domain, this irregular flow is characterized by a propagating band structure of strain localization. According to the discoverers, this phenomenon is named as Portevin-Le Chatelier effect.

这一现象在时域上表现为应力的锯齿形和局部应变的阶梯形发展，同时伴随着空间上可传播的变形局域化，被称为Portevin-Le Chatelier效应。