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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。

Based on the management principle and objective of Jiangsu SNWDP, the thesis establishes its management framework and designs three management patterns and four modes. Through analyzing the anticipative management effect, scopes in point, advantages and disadvantages of each modes seriatim, the thesis confirms the recommended pattern. It makes framework refinement design, defines rights and duties of control level, execution level and participation level for the recommended pattern. According to the principles of planned water use, metered water use, contract water use, toll water use, it studies project operation for recommended pattern from four aspects, namely water supply plan, measure intensified, water supply contract, and water rate enacted. The thesis analyses and studies how to ensure water supply quality of Jiangsu SNWDP from three levels, including doing watershed protection, intensifying intermediate process, and establishing a long-term mechanism. It makes brief design for dispatching management applied system, studies emphases parts which may affect operation of the pattern in practice, also analyses dispatching optimization of Provincial boundary project management, pumping station management, and different water resources. Finally, the thesis studies relevant basal supports and development stratagems for the management of Jiangsu SNWDP.

本文从分析南水北调江苏境内工程的管理原则、管理目标入手,构建南水北调东线江苏境内工程管理组织框架,设计了管理的三种模式,四个方案,对各种方案的预期管理效果、方案的适用范围、方案的利弊逐一分析,经比选后确定推荐模式;并对推荐模式进行结构细化设计,界定调控层次、执行层次、参与层次的权责;从供水计划、加强计量、供水合同、水价制定方面对推荐模式进行了工程运营的具体研究;从做好源头保护、强化中间过程、建立长效机制三个层次,分析研究如何确保南水北调江苏境内供水水质;对调度管理应用系统作了简要设计;针对实际管理中可能影响整个模式运行的重点细部:省界工程管理、泵站工程管理、不同水资源的优化调度等进行了研究;本论文还分析研究了南水北调江苏境内工程管理的相关基础支撑和发展战略。

According to the theory of Deterministic Finite Automata,an adaptive decision-making system is set up,which can change the selection of instruction pattern dynamically.

多模式智能教学系统中教学模式的选择是非常重要的问题,提出了一种教学模式选择的自适应策略,用教学模式相适度算法取得适度值,并制订一系列规则微调原先的相适度,根据确定的有限自动机理论,构建了一个自适应决策系统,实现了教学模式选择的自适应。

The reform of the civil procuratorial supervision system at present should deviate from outmoded conventions, eliminate unconformable characteristics, and establish new pattern of the procuratorial supervision.

一、民事检察监督的模式根据笔者的观察,检察机关的法律监督模式,从历史到现实,可以抽象出四种模式:其一,国家干预型监督模式,简称"干预型模式"。

And to the port operation pattern, the paper has used SWOT analyses, reached that it should adopt the increase type strategy pattern. Moreover the development strategy is been brought. Basined on the principle that three building steps of the port, three modes for the development of the port are given. And the paper has given the linking up and transition for the three stages. At last the paper gives a preliminary investigation and discussion of the operation pattern.

对于港口的运作模式,本文先是对园区港口进行了SWOT分析,得出了港口应采取增长型战略模式,从而提出了港口的发展战略设计,并根据港口分三步建设的原则,最终就港口发展提出了港口近中远期的运作模式,并给出了三种运作模式问的衔接与过渡,并就不同阶段的运作模式应开展的增值服务做了初步的探讨。

The organization structure of distance education system can be divided into four typical modes: tree mode, radial mode, netlike mode and mixed mode.

远程教育的组织结构分为四种典型模式:树状模式、辐射状模式、网状模式、混合模式。

The model of bilateralagreements, the model of independent legislation, the model of joint interregional commercial arbitration and the model ofinterregional treaty are the four models can be chosen to recognize and enforce arbitral awards among the fourjurisdictions.

双边协议模式、自主立法模式、区际联合商事仲裁模式和区际条约模式是我国四法域之间承认和执行彼此仲裁裁决的可供选择的四种模式。

The outgas types and amount of different gas resource varied with the different geological conditions and evolution processes. There are four outgas models including the model in which inorganic gas directly overflows from mantle matter through lithospheric fracture,the model of heat flow piercement outgas,the model of volcano-magma outgas,and the model of carbonate rock outgas due to heat metamorphism.

对气藏成藏条件和深部壳幔结构的研究表明,松辽盆地存在多种类型无机&气源&,由于赋存的地质条件和演化过程不同,不同气源脱气的方式、脱出气体的类型、脱气量也大不相同,共有4种主要的模式:地幔物质沿超岩石圈断裂直接脱气模式;热流底辟体脱气模式;火山—岩浆成因模式;碳酸盐岩热变质成因模式。

Part Three also includes two peds, Chapter Three "the models of teaching basedon functional situation" and ChaPter Four "the changes of the cognitiveapprenticeship".

第三章基于功能性情境的教学模式研究,立足教育心理学领域,选取中外基于功能性情境的教学模式的典型代表,抛锚式教学模式和李吉林小学语文情境教学模式进行专门探讨,并对这两种教学模式进行了深入的分析比较。

Fault Analysis and Treatment: An estimated following reasons: 1 self-completion computer emerged in the interface when activated by pressing the reset button, will appear in the start menu option to start, and the default choice is the safe mode, if the Press key, the system will enter the safe mode, restart the computer only needs to enter to the normal mode; 2 The system file is damaged or subjected to virus infection, resulting in Windows98 operating system can not enter into normal mode, can only enter the Safe Mode.

故障分析与处理:估计有以下几种原因:1)电脑在自检完成出现启动界面的时候按下了复位键,在启动时会出现启动菜单选项,并且默认选择的是安全模式,如果此时按键,系统便会进入安全模式,只需要重新启动电脑即可进入到正常模式;2)系统文件被破坏或遭受病毒感染,造成Windows98操作系统不能进入到正常模式,只能进入安全模式。

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推荐网络例句

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车,和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特,那个是爱朗。

Articulate the aims, objectives and key aspects of a strategic business plan.

明确的宗旨,目标和重点战略业务计划。