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The stochastic Bonhoeffer-Van der Pol system is first transformed into an equivalent deterministic system using the Chebyshev polynomial approximation, so that the problem of controlling stochastic chaos is reduced to the problem of controlling deterministic chaos in the equivalent system.

首先运用Chebyshev多项式逼近的方法,将随机Bonhoeffer-Van der Pol系统转化为等价的确定性系统,使原系统的随机混沌控制问题转换为等价的确定性系统的确定性混沌控制问题,继而可用Lyapunov指数指标来研究等价确定性系统的确定性混沌现象和控制问题。数值结果表明,随机Bonhoeffer-Van der Pol系统的随机混沌现象与相应的确定性Bonhoeffer-Van der Pol系统极为相似。

This paper analyze and study the influence of the superimposition in depth based on the previous achievements and combined with the theoretical qualitative analysis and project instances. The main contents as follow:Chapter 1: Indicate the significance and objective of this paper, review the previous achievements of the transient process and superimposition, and then present the study purpose of this paper.Chapter 2: combined with the physic knowledge of the fluctuation and the superimposition, Indicate the physical essences and the influence of the superimposition phenomena that exist in the diversion pipe system, and take one hydraulic turbine owning only one diversion tunnel and two hydraulic turbines sharing one tailrace conduit for instance to study out the numerical calculation superimpose operations.Chapter 3: From the calculation theory of the parameter of the guaranty calculation of regulation of the hydro-turbine, qualitative analyze the influence of the superimposition on them and the superpose time, combined with some project instances, get the numerical value of the influence of the superimposition and the superpose time.Chapter 4: Based on the previous achievements of the calculation and theoretical analysis of the surge-chamber ground swell, analyze the influence of the superimposition on it and the superpose time.

本文在前人研究成果的基础上,结合理论定性分析及工程实例,对波动叠加带来的影响进行深入分析研究,其主要内容如下:第1章,指出本文研究的意义和目的,回顾前人对水电站过渡过程及波动叠加方面的有关研究成果,在此基础上提出本文的研究内容;第2章,结合物理学中有关振动与波动叠加方面的有关知识,阐述水电站引水发电系统中存在的波动现象的实质及其影响,并以两机一洞和一机一洞具有上游调压室或下游调压室的水电站拟定其数值计算叠加工况;第3章,从机组调保参数的理论出发,定性的分析波动叠加对机组调保参数的不利影响及叠加时间,结合几个工程实例,得到波动叠加带来的影响大小及叠加时间;第4章,在前人对调压室涌浪进行计算和理论分析的基础上,分析波动叠加对调压室涌浪的影响及其叠加时间。

It is proved that the two-dimensional non-hydrostatic Boussinesq equations on the x ? z plane with the kinetic viscous term and the thermal dissipative term are unstable equations in the C 2 function class.2. If we replace the influence of the kinetic viscous term by Rayleigh friction and the thermal dissipative term by Newton cooling, the new generalized equations are stable equations in the C 1 function class. The construction of the solution space and the discriminating method for well-posedness of the problem of determining solution are given.

本文的主要结果如下:1证明了在y方向上均匀的带有运动粘性项以及热耗散项的两维非静力、Boussinesq近似的x-z面上两维旋转流体的控制方程组在C 2函数类中是一个不稳定的方程组。2如果以瑞利摩擦来代替粘性的影响,以牛顿冷却来代替热量的耗散,则所获得的一个新的方程组在C 1函数类中是一个稳定的方程组,给出了其解空间的构造和各种定解问题的适定性的判别方法。

The investment of IT is propelled mainly by IT engineers, so they mainly rest on technique, barely rest on economic. Even they rested on economic, system analysis are limited in qualitative and recapitulative and dispersive targets and did not formulate a set of systematic and integrated target system as reference or evaluation basis.

由于IT项目的投资实施主要是由主导信息技术的IT专业人员推动的,因此以往的研究往往把主要精力放在技术评价和实施上,但对其经济评价的探讨有所忽略,即使进行这方面的分析,大多也停留在几个定性的、概括性的、分散的指标上,并没有形成一套系统的、完整的指标体系和相应有效的评价方法。

Studying the related theory to the atical first, for example .competing theory, parallel theory , city Risorgimento theory and so on, carries out qualitative analysis on development of Cheng Hua District again , basing the qualitative analysis apply the SPSS software to analyse the way studying Cheng Hua District on quantitative analysis , to work out corresponding way to improve chenghuas competing power.

目前,有大量的文章宋阐述区域竞争力,但是往往都是以国家竞争力或者是省域的竞争力作为研究对象的,选取的指标个数多,涉及到的方面都很广,本文集中在成都市的五大主要城区进行分析研究,首先研究与本文相关的理论基础,例如竞争理论,比较理论,城市复兴理论等,再对成华区的发展进行定性的分析,再定性分析的基础上,运用SPSS软件分析研究成华区在这几个城区当中区域竞争力的综合排名,进行定量分析,以便对制定相应的区域竞争力提升办法。

This article analyses the application conditions of freezing method, current research status and the problems in this field. It points that it's necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil's nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field. It simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back-analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.

文中分析了冻结法施工的应用条件,目前对冻结法施工的研究现状和在此领域内存在的问题,指出了对深土冻结温度场进行深入研究分析的必要性;对影响冻结壁形成发展的因素如冻土土性、含水量、地质条件及施工方法等因素进行了论述;对冻结法施工的原理、过程,冻结法温度场的分布情况,影响冻结温度场分布的主要热学参数进行了综述;对深土冻土温度场模型进行了合理的简化,通过ANSYS大型有限元分析软件,建立了深土冻结温度场的模型,对不同导热系数情况下的深土冻结温度场进行了模拟;对ANSYS的模拟结果进行了定性的分析,通过对ANSYS结果的后处理取得了反分析时需要用到的测温孔理论温度值;经过对测温孔模拟温度值和实测温度值的分析,得到了冻结温度场的等效导热系数;使用等效导热系数对深土冻结温度场进行了求解,模拟了冻结壁发展情况和温度场中的温度变化曲线,用所得结果对比工程实际情况,取得了较好的效果。

This article analyses the application conditions of freezing method, current research status and the problems in thisiold. It, points that it" s necessary to study deep freezing temperature field deeply and discusses the factors which influence the freezing wall such as soil" s nature, moisture content, geological conditions, etc. It introduces the theory, process of freezing method, the distribution of temperature field of freezing method and key thermotics parameters influencing freezing temperature field, it simplifies the deep freezing temperature field model. Through ANSYS, this article founds the deep freezing temperature field model, and simulates the field on vary heat conductivities. It analyzes the results of ANSYS simulation, gains the theoretical value of thermometric holes which is needed by back analysis. Using the simulation temperature and actual value, it gets the equivalent heat conductivity. Then it solves the deep freezing temperature field by the equivalent value, simulates the freezing wall development process and temperature change curve. Against the actual project, the results are favorable.

文中分析了冻结法施工的应用条件,目前对冻结法施工的研究现状和在此领域内存在的问题,指出了对深土冻结温度场进行深入研究分析的必要性;对影响冻结壁形成发展的因素如冻土土性、含水量、地质条件及施工方法等因素进行了论述;对冻结法施工的原理、过程,冻结法温度场的分布情况,影响冻结温度场分布的主要热学参数进行了综述;对深土冻土温度场模型进行了合理的简化,通过ANSYS大型有限元分析软件,建立了深土冻结温度场的模型,对不同导热系数情况下的深土冻结温度场进行了模拟;对ANSYS的模拟结果进行了定性的分析,通过对ANSYS结果的后处理取得了反分析时需要用到的测温孔理论温度值;经过对测温孔模拟温度值和实测温度值的分析,得到了冻结温度场的等效导热系数;使用等效导热系数对深土冻结温度场进行了求解,模拟了冻结壁发展情况和温度场中的温度变化曲线,用所得结果对比工程实际情况,取得了较好的效果。

This will promote to the airline company improving services and enhance level of management and benefit of operation. This will advances the development of national economic and meet the requirement of people life and business activity, and increase the living quantity, and adapt to the travel industry to make use of. Everyone in the civil aviation should pay attention to.This paper analyzes the problem of development of regional aviation transport from three angles. Combining with the background of our country social economy development, and the speeding and improving service and advancing the marketing means, the compete power of three main transportation modes of regional aviation and railroad and highway in our country. From angle of tripper, a mathematical model of trip cost is established to quantitatively describe the choice behavior of passengers to select the model transportation. A

结合我国社会经济发展的背景,以及地面铁路和公路不但提速、改进服务和营销手段的现状,首先定性的分析了我国目前主要的三种客运方式支线航空运输、公路运输和铁路运输的竞争能力,然后从旅行者的角度,使用旅客出行成本模型,对成渝线、福厦线和台高线航线上不同出行方式的出行成本进行了对比研究,提出降低旅行成本,增强支线航空运输竞争能力的建议和方法;接着提出了利用层次分析法和模糊评判理论,对目前国内所采用的支线机型进行分析比较的方法,建立了选择支线机型的方法和评判标准,这给航空公司在发展支线航空选择机型时提供了一种评价选择方式;然后应用博弈论的方法、模型,分析支线航空运输航线结构变动时各种运输方式的经济行为、成因、结果及合理措施,提出航空公司发展支线航空运输的对策;最后对我国支线航空运输的现状进行了分析,并对未来支线航空运输的发展进行了预测,有针对性地提出了我国支线航空运输的发展策略。

COMPAREED WITH THE POETIC EXPERIENCES AND PHENOMENA WHASE NATURE HAS BEEN DETERMINED DURING THE LITERARY HISTORY, THE'THIRD GENERATION'POEMS, NOW STILL AFTER THE AGITATION, AND TRYING FOR CERTAIN FIRM TRANSFERENCE, ARE RATHER LIMITED IN DEALING WITH HISTORY AND THEORETICAL SIGNIFICANCE, WHETHER ON TIME SPAN OR SPIRITUAL LEVELS. THIS PAPER, THEREFORE, LAYS EMPHASIS ON DESCRIPTION AND INTERPRETATION AS WELL AS PRUDENT VALUE JUDGEMENT, INSTEND OF ARBITRARY DECISION. A MORE THOROUGH STUDY WILL HAVE YET TO BE WAITED WHEN THE'THIRD GENERATION'HAVE GONE A MORE FULL AND COMPLETE DEVELOPMENT.

与那些业已具备了历史定性的诗歌经验和现象相比,激荡之后归于沉潜,如今正在作出某些内坚实在的推移的&第三代&诗,无论在时间跨度上还是在所展示的精神层面上,对历史和理论意义的容纳程度都还显得相对有限,由此规定了论文对描述和阐释的侧重,以及对下论断式的价值判断尽可能保持谨慎的态度,后者将有待于&第三代&更为充分、完整的发展和立足于其上的更为充分的研究后,再加以弥补。

Men, at first, for the most part, contented themselves with what unassisted nature offered to their necessities: and though afterwards, in some parts of the world,(where the increase of people and stock, with the use of money, had made land scarce, and so of some value) the several communities settled the bounds of their distinct territories, and by laws within themselves regulated the properties of the private men of their society, and so, by compact and agreement, settled the property which labour and industry began; and the leagues that have been made between several states and kingdoms, either expressly or tacitly disowning all claim and right to the land in the others possession, have, by common consent, given up their pretences to their natural common right, which originally they had to those countries, and so have, by positive agreement, settled a property amongst themselves, in distinct parts and parcels of the earth; yet there are still great tracts of ground to be found, which (the inhabitants thereof not having joined with the rest of mankind, in the consent of the use of their common money) lie waste, and are more than the people who dwell on it do, or can make use of, and so still lie in common; tho' this can scarce happen amongst that part of mankind that have consented to the use of money.

最初,就绝大部分人而言,满足于自然直接提供给他们的生活必需品;然而后来,世界某些部分的种群,(在那里,人口和储蓄的增长,并随着货币的使用,使土地变得不足,因而有了一些价值)多个社群之间确定了他们各自的领土边界,并在社群内部通过法律管理他们社会的私人财产权,于是通过契约和协议,确定由劳动创造的财产权;多个国家和王国之间则订立盟约,以明确表达或默认的形式否认了彼此之间的土地要求和权利,从而,基于共同的同意,放弃了他们原初对于别的国家所拥有的自然的共有权利的要求,于是,通过肯定性的协议,确定他们之间的财产权,在地球上形成各个不同的国家;然而还有大片土地被发现,(那里的居民并未与其余的人类通过使用共同的货币而融合在一起)这些土地处于荒芜状态,多于那里的居民所能够使用,因而仍处于共有状态;不过这种情形很少发生在那些同意使用货币的人群之中。

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