查询词典 finite base

The paper gives stiffness matrix and mass matrix in finite element analysis of the ground vibration problem caused by track traffic by using three-dimension finite element method. Because three-dimension finite element analysis is very difficult, it is transmitted into a quadratic programming, which can be calculated by neural network.

本文融合神经网络技术和遗传算法，对轨道交通引起的地面振动进行了正分析和反演，并利用计算机技术实现了地面振动的三维动画模拟，这主要包括：(1)研究了压缩映射遗传算法，利用Banach空间的不动点定理证明了压缩映射遗传算法可以收敛到全局最优值，弥补了标准遗传算法不能收敛至全局最优值的不足。

It is found by solving the self-consistency equa tion that, at zero chemical potential and finite temperature the chiral phase transition is of second order, while both at finite temperature and density and at zero temperature finite density this transition is of first order.

通过求解序参量所满足的自洽方程，其结果表明：在零化学势有限温度情况下，有二级手征相变发生；对于有限温度和密度以及零温有限密度两种情况，手征相变为一级，并且其转变温度或密度与费米子所处的初始相有关，即从破缺相到正常相的转变温度或密度不同于从正常相到破缺相的转变温度或密度。

This paper is based on the former research taking the No.1 Tong-Lv Bridge as an example; the large universal finite element program Midas/Civil is adopted, a three-dimensional finite element model is established. The static performance, the comparative analysis of influence surfaces, the experimental study and the analysis of a local finite element model of the new style three-span continuous through type bow-string arch bridge is made. With these studies, this paper is aimed at revealing the performance of this kind of construction.

本文在前人研究的基础上，以通吕一号桥为背景，采用空间有限元法对结构形式新颖的三跨连续下承式系杆拱桥的静力性能、影响面比较分析、实桥荷载试验、局部节点分析等进行研究，旨在深入理解该结构形式桥梁的力学性能，为今后相同结构体系桥梁的结构分析提供可以参考的建议。

A finite element analysis on the new method is presented in this paper. Based on the finite element analysis, tension tests of 18 steel bars in different diameters and holes are carried out. The results of tests, which are according with that of finite element analysis, validate the new method to determine real stresses of steel bars by drilling/enlarging small holes. Furthermore, some suggestions in using of the new method are given.

本文针对该新方法进行了有限元分析，并在此基础上进行了18种不同钢筋直径和不同孔径的带孔短钢筋拉伸试验，试验结果与相应有限元计算结果一致，验证了钻／扩孔确定钢筋实际应力的新方法，并提出了若干工程适用建议。

In studies of interaction among pile, platform that above it and surrounding soil, this paper employ the concept of plate element to simulate the loading character of platform, and employ the concept of solid element to simulate the character of pile and soil, using the finite element method after understanding the geometry properties of pile, soil and the platform. Analyzing the loading properties of the three entities above and their deformation, this paper also employ a special element, Penalty Element. The introduction of penalty element of this kind has served to guarantee the join harmony of displacement between solid element and plate element, thereby effectively resolving the join problem between platforms, pile that support it and surrounding soil.Considering significant property difference between pile material and its surrounding soil, there may be much shear stress on their contact interface produced under vertical load, thus causing displacement or fission. Therefore it is necessary to adopt one special constitutive law of this kind of contact interface, which can reflect its feature of loading and deformation thoroughly. On the basis of the deformation feature and constitutive laws of some contact interface obtained by Zhang Dongji and people concerned through some single-shear experiments on contact interface between structure and soil, this paper employ one pile-soil three-dimensional constant thickness contact interface model to simulate the " slide" taken place on the interface between pile and its surrounding soil. With this kind model, this paper has also created one finite element model, which can be applied to perform finite element calculation and analyze the pile-loading feature, and deduced its element stiffness matrix.

在承台-桩-土共同作用中，考虑桩与承台的几何特性，采用有限元方法，用实体单元模拟桩土，用板单元模拟承台，更具体地分析桩和承台的受力特性和变形，而且还采用罚单元—既实体单元与板单元之间连接必须满足变形协调条件，来有效地解决了承台与桩土的连接问题，且在桩土共同作用中，由于桩体结构的材料性能与周围土层性质相差较大，在竖向荷载下有可能在其接触面上产生较大的剪应力从而导致错动或开裂，因此，为了充分反映桩土接触面上的受力及变形特征，应采用一种桩土接触面特有的本构关系，即利用张冬霁等人关于结构与土体接触面单剪试验所得到的接触面变形特征及其本构关系，引入桩-土三维等厚度接触单元来模拟桩与桩侧土之间的&滑移&，在此基础上建立可用于桩基承载性状分析的有限元计算单元模型，并推导出了各单元的刚度矩阵。

In the finite element analysis, by adding individual beam elements to model the connector between top joints and chords in finite element model, based on the experimental model, the factors affecting the shape forming process of dome, such as the bending stiffness of duckbilled connector and the size of top joints, can be taken into account; A whole and continuous analysis method is put forward for solving the question of applying the member forces produced in the shape forming process to the finite element models of load analysis.

有限元分析中，采用节点增设独立梁单元的方法，研究了鸭嘴半刚性连接和上弦节点域大小对穹顶成形过程的影响；提出了统一连续的分析方法，很好的解决了成形初应力向穹顶承载力有限元分析模型中的施加问题。

Magnetotelluric field finite difference migration tomography Found on the researches of Zhdanov etc. in MT finite difference migration tomography, we analyze and summarize both fruits and limitation of foregone peoples' achievements. So more precise finite difference extrapolation equation can be deduced, and it can be easily applied into the migration tomography. New equation reserved the derivative terms of wave number both at vertical and horizontal direction, so that more exquisite geoelectric diversification can still be accommodated, that is the very requirement of practical data interpolation.

大地电磁有限差分偏移成像技术：在Zhdanov等人建立的有限差分偏移成像研究的基础上，总结分析了前人在 MT成像技术方面的研究成果和存在问题；推导更精确的有限差分波场延拓方程，采用改进的有限差分法进行大地电磁场偏移成像，差分延拓方程保留波数对水平方向和垂直方向的一阶导数项而提高求解精度，可适应电性纵横方向变化剧烈的地电构造，使成像分辨率得到增强。

This paper reviews and summarizes the progress in this field as follows: the mathematical model and the difficulty of the analytical solutions is introduced; discusses the latest progress of the numerical solutions is discussed; the finite difference method, the Godunov method, the Boltzmann method, and the KFVS method of one-dimensional dam-break problem are introduced; the TVD method, the discontinuous finite element method, the finite volume method and characteristic method of two-dimensional dam-break problem are discussed; the applicability, the advantage and the disadvantage of each method are analyzed; and the progress in the numerical calculations of flow of fluid with free surface are presented.

回顾和总结了国内外对溃坝水流演进问题的研究进展：介绍了溃坝水流的数学模型及解析解法存在的困难，进而讨论了数值解法的最新进展；论述了求解溃坝水流一维问题的有限差分法、近似黎曼解的Godunov格式法、Boltzmann法、KFVS法和二维问题的TVD格式法、间断有限元法、有限体积法、特征线法，并分析了各种方法的适用范围和优缺点，及讨论了限制函数的使用；介绍了利用自由水面追踪方法计算溃坝水流的研究进展，并根据目前存在的不足和实际工程的需要，提出了进一步研究的方向和发展趋势。

Little eight-year accumulation and unremitting efforts, today's Hongyuan formed a strong production, sales and service network systems integration services, mainly embodied in: l, in Kunming, Sichuan, set up a fresh Lingyuan cut-flower production base, roses, lilies, tulips Series Fists are my company's products; 2, and Guangzhou into the United States, Bo Park, Tahan, a pioneer in high-tech and Hainan Nongda set up a long-term cooperative relations, ensuring product quality and stability sexual; 3, in Beijing Chaoyang District, Tongzhou District, and has set up specialized miniata production and storage of tropical flowers and trees pin base, engaged in viewing tolerant plants, potted plant, bonsai, seasonal flowers and green seedlings and other characteristics of tropical flowers and trees and landscape gardening equipment wholesale leasing operations; 4, in the Haidian District÷ìset up a flower production base of the flower can meet customer demand; 5, in Beijing too flowers Levin Office, Office of, Tung Ha, Xinglong, Kunming and other flowers of Dounan market standing distribution point; the Company with state-owned buildings, Yinhua Fund, Beiqi Futian, Thunis network than Granville, 31 heavy machine Oriental Electronics, Dentsu advertising, white ads, the first steam shares Bluebird fitness, Hao Sha Fitness, Siemens, the Three Gorges, the Capital Airport, light Xin Hotel, Sinopec, assembly, Shanghai city, China Hai-cheng, the Ministry of Agriculture and the Ministry of Agriculture office kindergarten organs, Beijing Publishing Group II°àunits such as multi-year cooperation provided×°flowers, flowers and garden maintenance engineering courier service, received by customers."Customer-base to the quality of survival, in good faith and development" is our company goal.

八年的点滴积累与不懈努力，今天的鸿源形成了一个强大的集生产、销售、服务为一体的网络式系统服务，其主要体现在：l、公司在昆明、四川、凌源建立了鲜切花生产基地，玫瑰、百合、郁金香系列是我公司的拳头产品；2、与广州的成美、波园、大汉、先锋、高新及海南的农大建立了长期合作关系，确保了产品的质量及稳定性；3、在北京通州区和朝阳区已建立专业化君子兰生产和贮销热带花木基地，从事观赏耐荫植物、盆花、盆景，应季花卉及绿化苗木等热带特色花木及园林园艺器材的批发租赁业务； 4、在海淀区西三旗建立了草花生产基地，能够满足客户对草花的需求；5、在北京的莱太鲜花厅、绿植厅、通厦、兴隆、昆明的斗南等花卉市场常设经销点；本公司与国企大厦、银华基金、北汽福田、清华紫光比威网络、三一重机、东方电子、电通广告、白马广告、首汽股份、青鸟健身、浩沙健身、西门子、长江三峡、首都机场、轻鑫宾馆、中国石化、总装、上海大都会、中国海诚、农业部办公楼及农业部机关幼儿园、北京出版集团等二百余家单位多年合作，为其提供的花卉租摆、鲜花速递及园林养护工程服务，深受客户好评。

Not only the class polarization in the process of Hans migration localization accelerated the development of landlord economy, but also accelerated the social changes of Yunnan. Especially, Hans migration accelerated that the clerisy class diffusely rose, improved the population diathesis and exerted a great influence in Yunnan society. All stroke Tu Si politics and established region base, economy base, thinking base and culture base for unify politics.

汉族移民进入云南促使汉族人口急剧增长；形成了民族杂居、民族融合；导致了汉化倾向更加明显；推动封建地主经济迅速发展并冲击土司政治的经济基础；引起了云南知识分子士绅阶层的兴起、汉文化和儒学的广泛传播、以"大一统"为核心的中华整体发展观深入各民族人心等因素的共同作用，从而奠定云南更全面地实行一体统一政治的地域基础、经济基础和思想文化基础，推进云南社会与祖国内地整体发展步伐的加快。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。