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The simulative model of temperature field and stress field in concrete , Heat and moisture coupling、Parallel simulative calculation of concrete with water pipe cooling、 Parallel feedback analysis of thermal characteristic parameters, and stress intensity factor of induced joint, which are the sixty-four-dollar questions, are studied in this dissertation. The main contents of this dissertation are as follows:(1)Based on the past and current research work, the calculation theory of the transient temperature field and creep stress field of mass concrete which self temperature influence is considered is deduced. The couple effect between the temperature field and humidity field of concrete, is considered on the basis of conservation law of water and energy, and the coupled formulation which coefficient is not constant of the heat and moisture in concrete is deduced. The calculation theory and model which is theoretically strict for solution to thermal problem in concrete with water-cooling pipes are recommended.
本文主要针对混凝土的温度场应力场仿真计算模型、热湿耦合、水管冷却问题的并行仿真、混凝土温度参数并行反演分析以及诱导缝应力强度因子计算等混凝土大坝温度应力数值仿真的关键技术进行了较为深入的研究,全文主要内容如下:(1)在现有研究基础上,推导了考虑自身温度影响的混凝土非稳定温度场和徐变应力场的计算理论;基于水分质量守恒和能量守恒原理考虑混凝土温度场和湿度场的耦合作用,推导了混凝土的变系数热湿耦合方程,并建立了相应的计算模型;引用严密的水管冷却混凝土温度场的计算理论和计算模型,比较了两种简化计算方法用于水管冷却混凝土仿真计算的不足。
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Based on the generalized dynamic inflow theory and classic non-steady aerodynamic loading theory, a real-time model is obtained by establishing wake distortion and decay, Then a real-time quasi-steady turboshaft twin-engined model is founded by simulating the rotor speed fluctuation.
在广义动态入流理论的基础上,基于经典非定常气动栽荷理论,建立了尾迹畸变和尾迹耗散的实时分析模型。为模拟大负载情况下旋翼转速的波动,建立了双发准定常涡轮轴发动机实时仿真模型。
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On account of the traffic flow with the high complexity and randomicity, we could adopt fuzzy theory and fuzzy control technology without setting up an accurate math model, which can avoid the unideal control effect, brought by inaccurate math model, and also can adapt the real-time control. Therefore, this paper applies the fuzzy theory and fuzzy control technology to research and discuss traffic control.
因为,交叉路口交通流的运行具有高度复杂性和随机性的特点,采用模糊理论和模糊控制技术,可以不需要建立精确的数学模型,这样既可以避免由于被控对象数学模型建立的不准确而导致控制效果不理想,又能够适应交叉路口的实时控制要求。
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This paper briefly introduces the come about background, content, model and development of Markowitz's Portfolio Theory before hand, and then builds a basic and simple target function model, considers the problem of existence of investment upper limit in single and overall investment, determines the relationship between yeild rate and risk rate, further deepens the appliction of the theory through actual case analysis, during which data analysis is also applied by using LINGO program.
本文首先简单地介绍了马克维茨投资组合理论的诞生背景、、内容、模型及发展,然后建立一个基本、简单的目标函数模型,考虑单个投资和整体投资有投资上限的问题,确定收益率与风险率的关系,通过实际的案例分析进一步加深对该理论的应用。在案例的分析过程中运用LINGO程序分析数据。
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The paper analyses the mode of expressway network charge distribution and existing questions, in view of the questions that go against regional highway network coordinated development, puts forward new theory and method of expressway network charge distribution; making use of game theory, constructing the model of expressway network charge distribution which has breakage risk and multi-people bid in turn, and analyzing characteristics of the model and advertent questions in application.
论文分析了现行高速公路网收费收入分配模式及其存在的问题,针对现行收入分配模式存在的不利于区域公路网协调发展的问题,提出了新的高速公路网收费分配理论和方法;运用博弈论理论,构建了具有破裂风险的多人轮流出价的高速公路收费收入分配模型,并分析模型的特点和模型应用注意的问题。
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It is the first time to use the " soft ball model" theory of duster to explain the structure of Yn ( n=2-8),and adopt the "shell model" theory and assigning equally delocalize valence electrons of cluster to elucidate the relativity of structure and stability of doped cluster of noble metal Au,,Y(l -9) successfully.
首次利用团簇的&软球模型&理论解释了Y_n(n=2-8)的基态结构,采用团簇的&壳层模型&和价电子离域均分理论成功地阐明了贵金属掺杂团簇Au_nY(n=1-9)的结构与稳定性的关系。
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According to the characteristic of composing air missile group to antagonize enemies air attack formation,this paper studies an evaluation model of shooting efficiency about homotype and different-type ground air missile groups using queuing theory and probability theory,and proves the feasibility and validity of this model.
针对现代防空作战中组建地空导弹群抗击敌空袭编队的特点,运用排队论原理和概率论理论对同型和异型的地空导弹群射击效能评估模型进行了研究,并通过实例验证了该模型的可行性和有效性。
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This paper started with discussion of innovation source, and found the contribution of industrial cluster for technological innovation. In succession, I made a simple depiction of some interrelated theory about industrial cluster technological innovation. Then, I pay more attention about introducing how the industrial cluster played the role of Hatcher, how the relationship between industrial cluster and technological innovation. After studying this, I abstract the model of the enterprises technological innovation in the industrial cluster. I found there were three kinds of model: one is Inner studying model, one is Exterior studying model, and the other is"Indraught- Diffusion- Absorbability"model.
本文开篇以探讨创新源入手,引出了产业集群对技术创新的贡献,接下来在简要的介绍了产业集群的技术创新理论之后,又重点论述了产业集群如何发挥其孵化器的功能、产业集群与技术创新的关联性等方面的问题,引出产业集群中的企业的技术创新模式,主要从集群内部学习型模式、外部学习模式、以及&引进——扩散——吸收&型模式来研究产业集群的创新模式,这些模式各有其优点,并且适用于不同类型的集群企业。
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In this thesis, several problems of time-dependent systems in various branches of physics are investigated by making use of the generalized invariant theory and the invariant-related unitary transformation formulation. The problems are given as follows:(1) Spin model and geometric phase factor in the fiber We investigate the fiber experiment performed by Chiao-Tomita and the Chiao-Wu theory concerning the geometric phase factor in the optical fiber, and then show that the investigation of the propagation of photons inside the noncoplanar optical fiber can be regarded as that of a second-quantization spin model.
本论文用推广的不变量理论和与不变量有关的幺正变换方法研究了一些物理分支中的几个含时系统问题:(1)自旋模型与光纤中光子几何相因子问题重新考察了Chiao-Tomita光纤实验和Chiao-Wu关于光纤中光子几何相因子的理论,证明了在非共面弯曲光纤中传播的光子运动问题实际上可以化为二次量子化含时自旋模型研究。
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The model of selecting matriculates based on Attribute Theory is a model of cognitive structure of psychology which is got by analyzing the special action of making decision on psychology with Attribute Theory.
基于属性论的高考招生模型,是属性论从分析高考招生者心理活动这个特殊的决策过程,得到一个心理认知结构模型。
- 推荐网络例句
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This one mode pays close attention to network credence foundation of the businessman very much.
这一模式非常关注商人的网络信用基础。
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Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.
扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。
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There is no differences of cell proliferation vitality between labeled and unlabeled NSCs.
双标记神经干细胞的增殖、分化活力与未标记神经干细胞相比无改变。