下的

The dissertation describes several traffic models for VTPOS, as well as analyzes and simulates the Characters of multiplexing, immerging, shaping of traffic, especially focuses on the Self-similarity traffic's influence to the buffer overflow and queue delay at E-OS.

本文根据光网络的特点，研究了在特定网络结构下，波长转换的合理配置问题；业务量网络分布下的最短路由优化方法，多级光网络下的逻辑拓扑；网络的偏转路由调度等，并对调度性能进行了必要的分析和仿真。

In this paper, we used molecule dynamics simulation technique in researching dielectric property. By analyzing the information that is provided from molecule dynamics simulation, we can got some dielectric properties like dielectric constant and chargeability. Firstly, 3D model of silicon dioxide was been built and geometric optimization was been used to make the model more correctly. Then the model was been put in calculation of molecule dynamics simulation with a definitive temperature.

本文针对氮化硼晶体在极端高温下的介电性能开展研究，首先建立六方氮化硼晶体的微观结构模型，通过几何优化对其进行进一步的结构修正，然后选择合适的力场、系综、积分时间步长和压力温度控制方法，对微观结构模型进行某一温度下的分子动力学计算，动力学计算达到平衡后得到该温度下电介质材料的微观结构模型和动力学特性。

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。

By means of field test for the pile of 15 meters length and MARC finite element analysis, this paper studies the bearing mechanism of the reinforced mixing pile, analyzes the law of load transfer and the percentage about cement-soil ring and reinforced concrete core under vertical load, analyzes the change law and interactive behavior about the pile's surface bearing and end bearing. In the end an experiential equation that can be used in Tianjin area to estimate the bearing capacity of single pile is proposed on the basis of test researches and finite element analysis.

分析了劲性搅拌桩在竖向荷载作用下的荷载传递规律及芯桩与水泥土的荷载分担比；分析了劲性搅拌桩在竖向荷载作用下桩侧摩阻力和桩端阻力随桩顶荷载的变化规律；分析了劲性搅拌桩在竖向荷载作用下桩端阻力及桩侧阻力的发挥性状与桩土位移间的关系及端阻力与侧阻力的荷载分担比。

This method ensures margins but can not be the best way to pricing in a competitive scenario: some exporters tend instead to consider a flexible cost-plus strategy which allows variations in special circumstances.

在竞争性的场合下，这种方法确保了边际成本，在竞争性的场合下，这种方法确保了边际成本，但不是定价的最好方法：是定价的最好方法：一些出口商相反地倾向于考虑一个弹性的成本加成战略以允许特殊情形下的变动。

This work mainly studies the structure of cryolite in the high temperature.The paper is divided to double parts.

本论文主要研究冰晶石在高温状态下的物质结构问题，论文分为两部分，第一部分研究了高温状态下冰晶石(Na3AlF6)的物质结构问题，我们采用自制的加温炉体进行了室温300K到1075K的在位拉曼测试，记录了样品从室温到熔融状态下的峰位及半高宽的变化。

A new calculation model is established using the simulating curves presented by Standing and Katz. The coefficients of the correlation are determined by fitting to the data of Standing and Katz Z-factor chart. The results of the two models are compared, the conclusion can be drawn that the error of LXF model is smaller than that of DAK model.

利用两种模型对不同拟对比温度和拟对比压力组合条件下的天然气偏差系数进行了拟合计算，与理论图版值的误差对比显示，在高温高压条件下LXF模型的拟合结果更优，特别是随着拟对比压力的增加，LXF模型的误差不断减小，因此，该模型更适用于高压和超高压条件下天然气偏差系数的工程计算。

In Chapter 2 of this thesis, the kinetic equation of substrate reaction in presence of denaturant has been derived. A re-examination of the effect of high concentrations of guanidine hydrochloride on the inactivation of papain, taking into consideration the effect of high concentrations of guanidine hydrochloride on the Michaelis constant, showed that, for papain, the substrate gives no protection on its inactivation.

我们在第二章中推导了变性剂存在下的底物反应动力学方程，并在考虑了高浓度盐酸胍对酶催化反应米氏常数的影响的前提下，根据推导的动力学方程重新分析了盐酸胍存在下木瓜蛋白酶的失活动力学，结果表明底物对木瓜蛋白酶的失活没有保护作用。

Biomass and WUE1 of wheat with R chromosome set is largest in all diploidy material, and that with B chromosome set is least in all diploidy material. Meanwhile, the root growth of wheat with A and B chromosome set is largest, and that with D chromosome set is least in all diploid material.

N、P影响了干旱下玉米叶片的气体交换能力，表现为提高了干旱下玉米叶片的气孔导度和光合速率，且N的作用要大于P的作用；N具有同时降低玉米叶片光合作用的气孔和非气孔限制的作用，而P提高玉米光合则主要是由于降低了干旱下的非气孔限制。

More attention is being focused on the deepburial closedsystem dolomitization. Some dolomitization of practical significance to the oil/gas reservoir and to the stratabounded deposits mainly occurred in closed system, which is different from the open system in the contribution to the change of reservoir space and the corresponding geochemical index.

3深埋藏条件下封闭系统的白云化作用受到关注：一些对油气储集空间和层控矿床有较大意义的白云化作用主要是在相对封闭条件下发生的，在对岩石储集空间的变化的贡献上以及在相应的地球化学指标上不同于开放条件下的白云化作用。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。