查询词典 three-four time

But it demands the higher computational accuracy. Time-dependent LU-SGS method and close coupled full implicit finite volume scheme are used. The AUSMPW+ based on the three-order MUSCL difference scheme is used for the inviscid operator, and the maximum eigenvalue splitting method is used to convert matrix operation to algebraic operation in order to shorten the computing time.

运用时间相关的LU-SGS方法，采用强耦合的全隐式有限体积进行离散，其中无粘对流项采用三阶MUSCL型差分的AUSMPW+格式，并应用最大特征值分裂，将矩阵运算转化为代数运算，大大缩短了计算时间。

This thesis contributed to the comprehensive study of the Finite-Difference Time-Domain method and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies. The work includes mainly three parts: the study on the performance of PML absorbing boundary condition applied to pseudo low frequency electromagnetic problems; the validation of the FDTD method with PML absorbing boundary conditions and the corresponding computer software based on the numerical study of the electromagnetic field of an electric dipole antenna, and its application to the numerical computation of radiated electromagnetic fields in switched mode power supplies; the development of an improved alternating direction implicit finite-difference time-domain method.

在综合前人工作基础上，本文对时域有限差分法及其在开关电源辐射电磁场数值计算中的应用进行了系统的分析和研究，其核心内容包括：伪低频电磁场数值计算中PML吸收边界条件性能的研究；基于基准问题—电偶极子天线三维辐射电磁场，验证了本文构造的基于PML吸收边界条件的三维FDTD法及其计算软件，并应用于高频开关电源辐射电磁场的数值分析；提出了一种改进的交替方向隐格式时域有限差分法。

Such doubts havesitimulated the researchers'curiosity and start to explore the students' terms This research proceeds by observation interview test using learning sheets and etc The purpose is to explore students' terms of scientific concepts sources of terms connections between students' usage nomenclature and chooses of usage The results of the research are as follows: 1 There are five kinds of naming principles for students' terms of scientific concepts: appearance habit function replacing and sound Appearance principle contains three categories: color shape and partial construction; habit principle contains custom and ability; replacing principle contains reality and non-reality 2 Students' terms of scientific concepts come from two ways: self-acquisition and learning through senses The former way is only a bit more common than the latter 3 There are three different relationships between students' usage of terms and nomenclature: one both the same in usage and meaning; the other both different; another different usage but the same meaning Normally terms that students used are various from nomenclature in the aspects of usage and meaning only a few would match and even rare for "Synonyms" to occur 4 Alternative options for students' scientific terms are maintenance adaptation or co-existence with formal scientific terms The most common way of selecting usage of terms is to maintain Sometimes students would adapt themselves once learn of scientist's term However some believe that very odd chances for both could exist at the same time

这样的疑问深深引起研究者的好奇，著手探索学生科学概念所使用的语言。本研究透过观察、访谈、学习单施测等方法来进行，目的在探讨学童在科学概念上所使用之学生惯用语、学生惯用语来源、学生惯用语与科学家用语之关联性、学生惯用语选择。研究结果如下：一、学童在科学概念上所使用之学生惯用语的命名原则有五种：外型、习性、功能、藉代称呼及声音，其中外型原则有颜色、体型及部份构造三类目，习性原则有习惯及能力两类目，藉代称呼原则有实体及虚拟两类目。二、学童在科学概念上所使用之学生惯用语有两种来源，分别为自己称取和听来。学生惯用语来源较多为自己称取，透过其他方式听来少一点，但两种来源的比率差距甚小。三、学童在科学概念上所使用之学生惯用语和科学家用语的关系有三种，分别为用语意涵均相同、用语不同意涵相同和用语意涵均不同。学生惯用语通常和科学家的用语是不同的，且其意涵也不同，只有部份学生惯用语和科学家用语意涵均相同，至於学生惯用语和科学家用语不同但意涵相同的极少。四、学童的科学概念相关学生惯用语选择有三种，分别为维持学生惯用语、改变成科学家用语和科学家与学生惯用语皆可。学童的科学概念相关学生惯用语选择，以维持学生惯用语最多，而有些时候学生会在得知科学家的用语后改变成科学家用语，但认为科学家用语和自己使用的学生惯用语皆可的则很少。

Single factor experiments were done with the factors including the width of protrusion and the trolley's velocity, which showed that the surface frictional coefficient decreases with the width of protrusion increasing, and doesn't change with the trolley's velocity changing, which was consistent with the results of the orthogonal experiment. A theoretical model of the horizontal projection of a corrugated bionic surface's contact area was built, which showed that the contact area's horizontal projection decreases with width and interval increasing respectively and that the ratio of the contact area's horizontal projection and the vertical load decreases with the vertical load increasing. It indicated that the surface frictional coefficient decreases with the above three factors increasing respectively. Finite element modeling and analysis of interactions of a plate and soils was done using ANSYS, which showed that the plate frictional coefficient is little relative to soil elastic modulus and decreases with vertical surface pressure and that trolley's pull and vertical displacement of bionic surface's control pilot keep constant almost during the plate being pulled. Finite element modeling and analysis of interactions of a corrugated bionic surface and soils was done using ANSYS, which showed that surface frictional coefficient is little relative to soil elastic modulus and decreases with bionic surface's structural parameters and vertical pressure increasing. However, the three factors all didn't affect the surface frictional coefficient remarkably on the condition of 90% dependability. For the first time, bionic surfaces were applied to screw piles, which formed bionic screw piles, and the contrast experiments showed the bionic screw pile had certain resistance-decreasing effects.

建立了波纹型仿生曲面与土壤的接触面积的水平投影的理论模型，表明接触面积的水平投影A随着波纹型仿生曲面突起宽度、两相邻突起间距的增大而减小，接触面积的水平投影与波纹型仿生曲面表面垂直载荷之比随着波纹型仿生曲面表面垂直载荷的增大而减小，进而得出仿生曲面摩擦系数随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小；利用ANSYS软件对平板与土壤的相互作用进行了有限元建模与分析，表明平板摩擦系数与土壤弹性模量关系不大，而随着表面垂直载荷的增大而减小；平板牵引过程中台车牵引力和仿生曲面控制节点垂直方向位移基本保持不变；利用ANSYS软件对波纹型仿生曲面与土壤的相互作用进行了有限元建模与分析，表明波纹型仿生曲面系数在一定范围内基本不受土壤弹性模量的影响，随着波纹型仿生曲面突起宽度、两相邻突起间距以及表面垂直载荷的增大而减小，但在可信度为90％的前提下，三个因素影响都不显著；首次将波纹型仿生曲面应用于与土壤作用方式以挤压为主的螺旋桩，形成仿生螺旋桩，并与普通螺旋桩进行了沉桩对比试验，表明波纹型仿生曲面应用于螺旋桩桩体表面具有明显的降阻作用。

TIE A YELLOW RIBBON ROUND THE OLE OAK TREE I'm coming home I've done my time Now I've got to know what is and isn't mine If you received my letter telling you I'd soon be free Then you'll know just what to do if you still want me If you still want me Oh tie a yellow ribbon round the ole oak tree It's been three long years do you still want me If I don't see a ribbon round the ole oak tree I'll stay on the bus forget about us put the blame on me If I don't see a yellow ribbon round the ole oak tree Bus driver please look for me 'Cause I couldn't bear to see what I might see I'm really still in prison and my love she holds the key A simple yellow ribbon's what I need to set me free I wrote and tell her please Oh tie a yellow ribbon round the ole oak tree It's been three long years do you still want me If I don't see a ribbon round the ole oak tree I'll stay on the bus forget about us put the blame on me If I don't see a yellow ribbon round the ole oak tree Now the whole damn bus is cheering And I can't believe I see A hundred yellow ribbons round the ole oak tree I'm coming home

原来他刚从监狱出来，释放前曾写信给妻子：如果她已另有归宿，他也不责怪她；如果她还爱着他，愿意他回去，就在镇口的老橡树上系一根黄丝带；如果没有黄丝带，他就会随车而去，永远不会去打扰她……汽车快到目的地了，远远望去，镇口的老橡树上挂了几十上百条黄丝带，车上的乘客都欢呼起来。

While consolidating and developing old crew troops, the company year to year faces the national big navigation colleges and universities employment of outstanding marine graduate because of taking charge of the foreign cooperation partner request.These graduates complete the practice time and the practice subject in the first ship stipulated by the Maritime Safety Administration, then exchange third mate, three engineers certificate .They above 90% directly are assigned as third mate, three engineersthe on second ship.

在巩固发展老船员队伍的同时，受国外合作伙伴的委托我司常年面向全国各大航海院校招聘优秀航海类专业毕业生，这些毕业生在第一条船完成海事局规定的实习期和实习科目换领到三副、三管轮适任证书后90%以上的人员可在上第二条船时直接任职三副、三管。

The three young leopards from the North - Hlabankunzi, Metsi and Xikavi - have all been mating with the Tegwane male yet again. These frequent matings might continue for a while until such time as these three young females have established themselves in a territorial area.

在北部， Hlabankunzi，Metsi和Xikavi三只年轻雌豹都与雄豹Tegwane有交配的行为，他们频繁的交配可能会持续一段时间，直到这三个年轻的雌豹建立自己的领土为止。

Each House Detective installation kit comes with three primary test instruments; a frequency agile signal level meter, a frequency agile radio frequency leakage detector, and a zero foot dead zone time-domain reflectometer; all three housed together in a durable hard case.

每家侦探安装套件具有三个主要的测试仪器，一个频率捷变信号电平表，一个频率捷变射频泄漏探测器和一个零脚死区时域反射计；所有三个关在同一个持久的疑难案件。

Three disks would give you three times the throughput and a apparent seek time of a third.

三个磁碟将给你三倍输贯量和三分之一的表面搜寻时间。

The scientists then searched for potential dates that satisfied all three astronomical conditions close to the date of Troy's fall, which has since Schliemann's time been estimated to have occurred between 1250 and 1115 B.C. In this 135 year period, only one date satisfied all three references - April 16, 1178 B.C., the same date as the eclipse calculated by Schoch and Neugebauer in the 1920s.

科学家们然后寻找潜在的日期能够满足所有这三个条件接近天文数字的日期特洛伊的下降，这已经谢里曼的时间估计已发生12时50分至公元前1115年在这一百三十五年时期，迄今只有一个满意的所有三个参考资料-1 178年4月1 6号前，在同一日期作为计算月食和挪克伯肖赫在2 0世纪2 0年代。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。