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Testing results of piles under low strain integrity are normally interpreted using one-dimensional stress wave theory. While one-dimensional stress wave theory is acceptable for pile-driving analysis the responses of piles integrity tests can not be adequately simulated when the hammer and the incident wave length are small in relation to the diameter of the pile.

基桩动测问题的理论基础一维应力波理论只有在锤径桩径比、波长桩径比、桩长桩径比足够大时才能近似成立,否则该问题实际上为应力波在柱体中传播的三维问题。

A detailed three-dimensional solid model of the piston is established by means of Ansys 11.0 Workbench Environment, which is issued in March 2007. Using the third thermal boundary conditions, analysis of the three-dimensional piston, including temperature, displacement and thermal stress field are performed by means of thermal-structural coupling. Structural optimization is also accomplished and a new piston has been designed, which performance is getting improved.

本文在2007年3月发布的Ansys 11.0协同仿真环境中建立了详细的活塞三维实体模型,运用第三类热边界条件,结合热耦合分析方法完成了活塞的三维温度场,位移场及热应力场的仿真,在此基础上对活塞的结构优化进行了探索,并设计出一款性能得以改善的活塞,实现了真正意义上的仿真驱动产品设计。

The response time can be shortened and high throughput and real-time detection analysis can be achieved. Although now the use of zero-dimensional nanomaterials is popular, it is still rare for the study of one-dimensional materials.

与传统的生物传感器相比,基于纳米技术的新型生物传感器已呈现出更优越的性能,具有了亚微米的尺寸、换能器、探针或者微米系统,生物传感器的化学和物理性质和其对生物分子或者细胞的检测灵敏度大幅提高,响应时间也得以缩短,并且可以实现高通量的实时检测分析。

Results show that the convergence is improved evidently.(3). The hybrid model which combines three-dimensional simulation in turbine and zero-dimensional simulation in the other engine components is built in the present paper after learning the zooming technique from NASA. The matching between components in a single-shaft turbojet engine after the turbine retrofitting is studied.

在对以上三种不同层次的数学模型及其解法进行了研究的基础上,鉴于NASA的部件一维仿真与总体零维仿真相结合的ZOOMING技术,本文采用将涡轮的全三维仿真与发动机总体的零维仿真相结合的方案,对某单轴涡喷发动机在涡轮改型后的匹配问题进行了研究。

A method of computing and visualizing the combustion process in a DI gasoline engine is presented, taking a complex shape DI combustion chamber as a case, basing on a three-dimensional staggered grid, using a zero-dimensional combustion model with sequential multi-point combustion in this paper.

本文研究了缸内直喷式汽油机燃烧过程的计算机模拟计算与燃烧过程可视化方法。论文以一个复杂形状的直喷式燃烧室为例,基于三维交错网格,应用零维燃烧模型,按照油束形状以多点连续燃烧的形式计算研究了该方法。

Results All of the 55 stereograms could achieve a clear three dimensional view. Senior surgeons, young surgeons and non-professional people were asked respectively to give their judgement. The results showed that the accurate rate by watching plan view images was 100%, 60%, 25%, respectively, while with the aid of a three dimensional view fixture the rate was all up to 100%.

结果 制作的55张立体解剖图片均能产生清晰的立体视觉,在对平面图解剖结构的层次关系判断上本专业高、低年资医生及非本专业成员的准确和较准确级别分别达到100%、60%、25%,在对立体图的层次关系判断上均达到100%。

The results showed that the accurate rate by watching plan view images was 100%, 60%, 25%, respectively, while with the aid of a three dimensional view fixture the rate was all up to 100%. coclusion three dimensional view fixture can help people distinguish the anatomical details in various layers.

将立体视图镜运用于颞骨解剖有利于提高人们对颞骨细微解剖结构层次关系的认知度,是一种简便、有效地学习和掌握颞骨解剖知识的方法。

In the future, some issues need to be investigated further, which include: establish and study the low-dimensional dynamical system of turbulent jet, with the POD bases, the control of turbulent jet based on the low-dimensional dynamical system of turbulent jet, investigate the physics mechanism of intermittence shed-off of the vortex ring in turbulent jets in crossflow.

有待进一步研究的问题是:建立基于POD模的湍流射流低维动力系统,并对其进行分析;研究基于湍流射流低维动力系统的湍流射流控制;探讨湍流横向射流中涡环间歇脱落的物理机制。

The model of 3-dimensional stretching vortex ring of turbulent elliptic jet in crossflow are discovered for the first time. It is pointed out that in the evolution of turbulent jet in crossflow the 3D vortex rings, which stretching, distorting, swing in transverse direction and twisting around the stream-wise, play the leading role in the large-scale coherent structures. The counter-rotating vortex pair observed in the literature is in fact the head of the 3-dimensional vortex ring.

首次发现和提出了湍流横向椭圆射流的三维拉伸涡环模型,指出在其大尺度拟序结构中真正占主导作用的是拉伸、扭曲、沿流向扭动、展向摆动和绕x轴的转动的三维涡环,在众多实验和文献中观察到的反向涡对其实是由三维涡环头部组成。

Sytematic introduction of GPS theory and its three sub-systems, with focus on GPS's role in transportation which includes road engineer, auto navigation, traffic supervision and etc, has been presented in this paper. Thanks to its ability to provide continuous high-precision 3-dimensional coordinate all day round, technical parameter of 3-dimensional speed and time information, GPS has been widely used in public transport system in recent 2 years.

本文系统介绍了GPS的原理和其三大子系统,着重介绍了GPS系统在交通运输中的应用,包括在道路工程、汽车导航和交通管理中的应用以及其他应用, GPS全球队定位系统在公交系统中的应用,在最近两年得到了迅速的推广,这主要依赖于GPS系统可以向全球任何全天候地连续提供高精度的三维坐标、三维速度和时间信息等技术参数。

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推荐网络例句

Looking to bounce back from defeat against Cesena last weekend, the Calabrian boss will be sticking to his tried and tested 4-3-3, with Lopez and Sedivic joined up front in Giampaolo's absence by either Nanni or Plasmati.

鉴于上周末对切塞纳的比赛中反败为胜,这支南方球队将会更坚持其一贯而有效的4-3-3阵型,洛佩斯和塞德维奇将取代受伤缺席的詹保罗,和纳尼或者帕斯马蒂中的一个搭档锋线。

Meanwhile, their exposure to the more freewheeling ways of the West broadened dramatically.

另外,西方较自由的生活方式对年轻人的影响增大。

We are fed up with what the garrulous old lady said.

我们已经对那位爱唠叨的老太太所说的话感到厌烦了。