查询词典 two dimensional

It must depend on external database. Without the database, one-dimensional bar codes can not have meanings. Two-dimensional bar codes overcome this weakness, it can encode a large ament of information in a small area, is a full data file.

目前常用的是一维条码，但一维条码最大的弱点就是表征的信息量是有限的，需要依赖外部数据库支持，离开这个数据库条码本身就没有意义了。

In the paper, the logarithmic transformation for the analytic solution on the space-time change of the tracer concentration during the instantaneous injection and the process of the one dimensional steady flow field and two-dimensional unsteady hydrodynamic dispersion is performed, and the linear equations have been obtained.

该文将描述瞬时投放示踪剂、一维稳定流场二维非稳定水动力弥散过程中的示踪剂浓度在时空上变化的解析解进行了对数变换，得到一直线方程。

Purpose To compare two dimensional method (2D) and three dimensional method (3D) with spiral CT for measurement of femoral neck anteversion.

目的 研究比较螺旋CT二维法和三维法在小儿股骨颈前倾角测量中的应用价值。

The development of animation as the progress of mankind in the new century painting of the logo, the inheritance of human culture and biological organism also update it regularly, the human imagination as an extension of time and space changes, the modern design gradually from 2D to 3D and 4D (that is, We often hear the two-dimensional space, three-dimensional space, four-dimensional space) space extension of the art of color design and science and technology as we show a wealth of space symbol, is also given to the human meaning of a new life.

动画片的发展作为新世纪人类绘画进步的标志，人类文化的继承也和生物机体的不断更新有关，人的想象随着时空的变化而延伸，现代设计也逐步从2D到3D和4D（也就是我们常听到的二维空间、三维空间、四维空间）空间延伸，色彩设计中的艺术化和科技化为我们展现了丰富的空间符号，也赋予人类新的生活内涵。

The relationship between an object s three dimensional entity and its two-dimensional multi-views can be expressed vividly and visually by Solid Edge V11 parametric molding software, which constructs three-dimensional entity model and represents an engineering object spatially and dynamically.

用SolidEdgev11参数化造型软件建立三维实体模型，以真正的空间概念和动态方式表示工程对象能形象直观地表达一个对象的三维实体与多幅二维视图之间的关系。

Lots of manufactured structure such as two-dimensional film, one-dimensional line and zero-dimensional dot has attracted more and more attentions.

在理论方面，随着计算方法和计算能力的惊人发展，从第一性原理出发对薄膜体系的磁学性质的预言能力得到了巨大的提高。

The ionic liquids have been widely used in the preparation of zero-dimensional nanomaterials,one-dimensional nanomatefials and two-dimensional nanomaterials until now.

离子液体在纳米材料制备方面具有很多优势，为纳米材料的制备开辟了一条新的途径。

With the development of molecular-beam epitaxy and microfabrication techniques, people can arrange the atoms and moleculars at will and make various zero-dimensional, one-dimensional and two-dimensional systems even single molecular devices.

随着分子束外延等超薄生长技术和精细束加工技术的不断发展和完善，使人们能够按照自己的意愿排列原子、分子，制备出各种各样的零维、一维和二维纳米结构，甚至单分子器件。

Using the two-stream fluid model, the linear dispersion relation is derived assuming a two-dimensional spatial geometry. Two cases are considered, one is that the 2D spatial geometry is defined by the plane containing the two counterstreaming electron populations and the perturbation wave vector , and the other is that the geometry is defined by the plane being vertical to the two counterstreaming electron populations .

对高能束流和电子回流构成的双流系统，建立冷等离子体流体模型，采用简正模分析方法，分别考虑扰动波矢在平行于电流传播方向的平面上和在垂直于电流传播方向的平面上这两种情况，推导了不稳定性的色散关系。

Using fluid dynamics FEM (two dimensional, three dimensional andaxisymmetric) and three dimensional acoustic FEM in meticulous analysis ofexpansion muffler structure, this paper studies the influences of each mufflercomponents' position, dimension, form and quantity on the fluid dynamic andacoustic performances;therefore the paper indicates that the end of the intruding tubeis the linchpin of the fluid dynamic performance of the whole muffler structure, thespringhead of muffler fluid dynamic performance is the smoothness of air current, themain factor which affects the acoustic attenuation value of expansion chamber muffleris the grade of saltation of the section of air conducting access, and the attenuationvalue of specific frequency can be dramatically enhanced by carefully designing thelength of expansion chamber.

本文通过流体力学有限元方法和三维声学有限元方法对扩张腔消声结构的参数化模型进行了细致的分析，研究了这种结构的各个组成部份的位置、大小、形状和数量对其流体力学与声学性能的影响，指出插入管端口是影响整个结构流体力学性能的关键，消声结构流体力学性能的根源是气流通过时的平稳程度；影响扩张腔消声量的主要因素为声波传播通路截面突变的程度，并可以通过精细的设计扩张腔轴向长度获得宽频或指定频率消声量的大幅度提高。

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。

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。