Based on an analysis of the internal relation between binary and sets ,a novel idea of binary-based set operation is presented in this paper.

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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.

通過(guò)上述幾個(gè)方面的研究黄片免费在线播放，主要得出以下15條結(jié)論：(1)生態(tài)位構(gòu)建可使空間結(jié)構(gòu)種群人干人人，甚至是在沒(méi)有雜合子優(yōu)勢(shì)的條件下，形成多種可能的穩(wěn)定基因型分布模式欧美AAAA在线视频免费观看；(2)隨著環(huán)境的破壞與惡化久热国产vs视频在线观看，種群的生態(tài)位構(gòu)建作用加速其較早形成穩(wěn)定多態(tài)以阻礙環(huán)境對(duì)種群的不利影響，解釋了有機(jī)體在不利環(huán)境下的一種生活史對(duì)策国产com；(3)生態(tài)位構(gòu)建作用通過(guò)基因型—環(huán)境反饋機(jī)制及有限的基因交流導(dǎo)致基因型多態(tài)的穩(wěn)定共存a黄色欧美片在线播放；(4)有機(jī)體的生態(tài)位構(gòu)建作用是一種積極的動(dòng)力改變環(huán)境進(jìn)而改變其自然選擇的方向；(5)生態(tài)位構(gòu)建的時(shí)滯作用對(duì)集合種群動(dòng)態(tài)和空間分布產(chǎn)生深刻影響免费黄一区；(6)集合種群大小在時(shí)滯的嶄新效應(yīng)和等權(quán)重效應(yīng)下達(dá)到一固定值，而在首位效應(yīng)下達(dá)到統(tǒng)計(jì)穩(wěn)定18岁禁止黄片，表明首位效應(yīng)的影響最顯著1313午夜精品福利片；(7)首位效應(yīng)下生態(tài)位構(gòu)建相對(duì)權(quán)重的增量和時(shí)滯的長(zhǎng)度是影響系統(tǒng)不穩(wěn)定性動(dòng)態(tài)的關(guān)鍵因素欧美日韩精品专区；(8)適中的生態(tài)位構(gòu)建強(qiáng)度有利于集合種群的續(xù)存；(9)生態(tài)位寬度變窄會(huì)減少集合種群的數(shù)量從而增加其滅絕風(fēng)險(xiǎn)亚洲一级aⅴ无码毛片中文国产；(10)時(shí)滯和生態(tài)位構(gòu)建的雙重作用使系統(tǒng)產(chǎn)生周期振蕩欧美色t，并在異質(zhì)性環(huán)境中產(chǎn)生穩(wěn)定的螺旋波，破碎的螺旋波和環(huán)形波三種分布模式中国产XXXXA片免费视频软件；(11)集合種群與資源含量的空間分布因?yàn)橄鄿パa(bǔ)国产精品热久久无码AV；(12)具有生態(tài)位構(gòu)建的集合種群續(xù)存不僅取決于侵占率與滅絕率之間的平衡，而且依賴于生態(tài)位構(gòu)建能力同其生境的自然消耗速率之間的妥協(xié)熟妇精品视频；(13)當(dāng)生境中適合侵占的斑塊比例小于其侵占率與滅絕率之比時(shí)色色视频看片，生態(tài)位構(gòu)建作用促使集合種群在一定條件下續(xù)存：(14)生境斑塊的狀態(tài)從不適合到適合轉(zhuǎn)變過(guò)程中存在生態(tài)位構(gòu)建強(qiáng)度和系統(tǒng)初始條件這兩個(gè)閾值；(15)集合種群的大小同正生態(tài)位構(gòu)建能力正相關(guān)91精品啪中文字幕，意味著對(duì)環(huán)境具有較強(qiáng)正作用的有機(jī)體對(duì)維持有效生境起積極作用国产资源免费视频一区。

Firstly a formal syntactic of UML statechart diagrams was given and a series of auxiliary functions to describe the structure features of UML statechart diagrams were presented in which target determinator and source restriction were used to describe the inter-level transitions and open events and close events were used to describe the communication among UML statechart diagrams.

首先給出了UML狀態(tài)圖的形式化語(yǔ)法定義，其中用狀態(tài)集合66j8影、轉(zhuǎn)移集合亚洲无码操逼视频、事件集合、條件集合95视频官网、活動(dòng)集合亚洲精选午夜久久久无码6080、對(duì)象集合和變量集合，定義了一系列輔助函數(shù)描述UML狀態(tài)圖特征亚欧天堂，用確定目標(biāo)狀態(tài)和受限源狀態(tài)表示層次關(guān)系精品日韩性爱，用開(kāi)放事件和封閉事件表示對(duì)象之間的消息。

In this paper, the main findings are a total of 11 full function integrated words, including two first order full-function sets of connectives, seven second order full function sets of connectives and two third order full-function sets of connectives.

得到的主要結(jié)果是：全功能聯(lián)結(jié)詞集合一共11個(gè)www插插插99，其中国内永久网址，一階全功能聯(lián)結(jié)詞集合2個(gè)，二階全功能聯(lián)結(jié)詞集合7個(gè)午夜肥婆；三階全功能聯(lián)結(jié)詞集合2個(gè)最新a片视频网站；沒(méi)有四階及四階以上的全功能聯(lián)結(jié)詞集合。

A set is "less than" another set if and only if the first set is a proper subset of the second set, and a set is "greater than" another set if and only if the first set is a proper superset of the second set.

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The union of any two sets consists of those elements that are in one or the other or in both given sets; the intersection of two sets consists of those elements that are in both given sets.

任何兩個(gè)集合的并集包含了出現(xiàn)于這兩個(gè)子集中某一個(gè)集合或同時(shí)出現(xiàn)于這兩個(gè)集合中的所有元素；兩個(gè)集合的交集包含了同時(shí)出現(xiàn)于這兩個(gè)集合中的元素男人天堂黄色网址。

The union operation is practically equivalent to the OR of sets. The union of two sets is another set where each element is a member of at least one of the sets, i.e., a member of one set or the other.

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The outputs from the ensemble simulation are analyzed using the three basic interpretational methods commonly used in the ensemble forecast; the consequence is that it is practicable to introduce ensemble technique in regional climate study. Th...

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Adaptive Server Enterprise 第5章使用 set showplan 拆組集合消息 Evaluate Ungrouped type AGGREGATE.

當(dāng)一個(gè)集合函數(shù)生成單個(gè)值時(shí)，該函數(shù)就被稱為標(biāo)量集合或者拆組集合360毛片视频AA。

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.

為了能總觀集合種群進(jìn)展的全局并開(kāi)展進(jìn)一步的工作三级黄色片超碰免费在线观看，首先對(duì)集合種群的已有概念、理論和模型做了全面的分析和總結(jié)男女猛烈无遮挡羞羞视频；其次對(duì)集合種群的發(fā)展和概念進(jìn)行了探討色呦呦av电影，以集合種群模型的中心框架：Levins的斑塊占據(jù)模型為基礎(chǔ)，展開(kāi)對(duì)其它原理日韩在线主播福利影院AV、效應(yīng)和機(jī)制的探討97久久超碰中文字幕潮喷直播；主要包括了Levins原理，即當(dāng)生境進(jìn)到破壞時(shí)亚洲图库日韩在线专区，空斑塊比例在集合種群滅絕前保持不變人妻中文字幕系列无码专区，然后還分析了Allee效應(yīng)（集合種群的Allee效應(yīng)主要是由于建群困難和擴(kuò)散損失造成的）；第三狂野欧美，分析了援救效應(yīng)：遷人個(gè)體可以降低斑塊中現(xiàn)有局域種群的滅絕風(fēng)險(xiǎn)午夜操逼小视频，援救效應(yīng)會(huì)增強(qiáng)集合種群的生存力，使空斑塊比例下降第四色色色色色色色色色人人人，探討了兩競(jìng)爭(zhēng)集合種群的共存機(jī)制黄页视频在线高清观看免费，即競(jìng)爭(zhēng)－侵占妥協(xié)，其共存機(jī)制為空間生境中物種共存提供了有力的理論解釋99国产真人作爱免费视频。