加速

The operator of crossover, mutation and selection in HGA have function of macroscopically search, that deals with a large scale search, while the quasi-Newton operator has function of local search, and deals with a small circle search and problem of accelerating of search.

混合遗传算法中交叉算子、变异算子和选择算子的作用是宏观搜索，处理的是大范围搜索问题，而拟牛顿算子迭代运算的作用是局部搜索，即微观搜索，处理的是小范围搜索问题和搜索加速问题。

This feature gives a reasonable explanation for the mechanism of CAS. The phase velocity of diffraction fields for uniform plane wave on a circular aperture has been investigated. It is shown that diffraction can result in subluminous phase velocity at certain points of optical field in vacuum.

如果相对论电子能够注入到这一通道内，那么它与激光场间的相移就可能变得非常小，从而能够长时间地保持在加速相中得到极高能量。

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。

From every state and city, we will be able to speed up that day when all of

响起的时候，我们将能够加速这一天的到来。那是，上帝所有的孩子，无论黑人白人还

With the economic globalization and the acceleration of cityward progress , many Chinese cities found it is absolutely necessary to construct their own city brand. In order to promote the excellent cycle eventually, they have to obtain the resources for city development by competition and pursue the coordination development of economy, society, science and technology, culture and population, resources, environment.

经济全球化及中国城市化进程的加速要求城市走品牌经营的道路，通过竞争获取城市发展的资源，追求经济、社会、科技、文化和人口、资源、环境的协调发展，最终促进城市发展的良性循环。

This Peugeot concept car I design will have these characteristics. It is called "cyx". C represents 'cityward' , which the car is designed for future cities. Y stands for 'yare', which shows the Peugeot's reputation for precise and predicatable handling. X is 'x-factor', meaning your excited feeling when you drive this Peugeot concept.

我给这辆车起名为cyx，三个字母各有寓意。C是"cityward"的意思，因为车子所有的一切是为适合明日都市开发的；y代表yare，表示车子的弯道性很好，加速快捷，这也是标致一贯的特点；x是x-factor，因为驾驶它能给你带来快感。

Therefore, with some engineering and biological measures, after some pioneer trees are planted in extremely degraded tropical areas,the pioneer forest should be reformed by multilayer and multispecies broad leaved mixed forest in time, wihich could accelerate the development of artificial forest into local climax community.

因此，对于极度退化的热带丘陵台地区，在一定工程和生物措施基础上，用先锋绿化树种造林成功后，及时用多层多种的阔叶混交林改造原有先锋林，可以加速人工林向地带性植被类型演替。

It is found that before the occurrence of strong earthquake the medium tendency of clinometer observes in Sheshan Seismic Station shows obvious tendency transition, acceleration and change phenomena.

发现强震发生前，余山地震台的倾斜仪器从中期趋势上出现了明显的趋势转折、加速、变化现象。

The coarsely integrated operated scanning method is used to inplement the hardware implementation of Montgomery.

设计中采用了适合硬件实现的CIOS方法，在保持硬件规模较小的同时加速模乘运算速度。

Inspirited periodically by means of centrifugal inertial force, the lopsided rotor will produce coercionary vibration and inordinate noises, accordingly result in the exacerbating of the working conditions. At the same time, the components of the axletree will wear down quickly, that has reduced the natural life and working efficiency.

由于周期性的离心惯性力对转子的激励作用，不平衡转子将产生强迫振动和过度噪声，从而导致工作环境恶化，加速轴承等零部件的磨损，降低机器的使用寿命和工作效率。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。