A two-dimensional model of such a universe would look like a sphere. It's impossible to have parallel geodesics (straight lines on a curved surface) — the two lines will cross at some point.
这样的2维宇宙模型就像是球体，不可能出现平行的测地线(测地线是曲面上的直线)——两直线必然在某点相交。
Two kinds of size effects on micro deep drawing are investigated, which can be explained by surface layer model and strain gradient model.
另一个为考虑应变梯度效应的模型，该模型在已有的材料特征基础上引入了尺度效应。
The hand model consists of two models: one is bones model used to implement motion, the other is surface (skin) model to represent motion.
这个手的模型是由两个模型组成：一个是实现运动的骨骼模型，另一个是表现运动的表面(皮肤)模型。
This new two dimensional surface states model explains the origin of surface states and the contradiction between deep surface levels and the low activation energy of a transient current.
用该态模型解释了氮化物产生高密度表面态的原因和深表面能级与较浅的瞬态电流激活能间的矛盾。
Based on lattice model, Monte Carlo simulations have been taken to explore the performances of two component chain molecules for competitive adsorption on solid surface.
在格子模型中，采用计算机模拟方法了二元链状分子系统在固体表面的吸附行为。
Products surface digitizing and three-dimensional model rebuilding are two key technologies of re.
产品表面的数字化和三维模型重建是RE中的两项关键技术。
Ignition start-up model of impulse micro-thruster is established, considering two phase flow and impact heat transfer of particle on the surface of propellant.
建立了微型脉冲推力器点火启动模型，模型中考虑了两相流动和颗粒对推进剂表面的冲击传热。
To simulate the roughness surface is the pre-condition that builds the roughness model and simulates the interaction of two contacted surface.
粗糙表面的计算机模拟是建立粗糙表面模型进而对粗糙表面间相互作用进行模拟研究的前提。
This thesis studies two aspects: the Boolean operations on point models and the fusion; grid-based model of discrete surface fusion method.
本文主要研究了两方面内容：基于点模型的布尔运算及其融合方法；基于网格模型的离散曲面融合方法。
This paper represents a mathematical model of transpiration cooling control system with two-dimensional heating and surface ablating.
本文给出二维加热且具有表面烧蚀的发汗控制数学模型。
The infiltration process of the water on the surface is analysized under rainfall conditions, the two-dimensional mathematical model and its boundary conditions are presented.
分析了降雨条件下地表水入渗的过程，提出了降雨条件下非饱和渗流的二维数学模型及边界条件。
According to the results of the deep seismic sounding and surface wave dispersion tomography, a two-dimensional model is used to do the match in the interpretation.
解释时根据深地震测深和面波频散层析成像的结果，用二维模型进行正演拟合。
This paper gives a brief description of the whole process of the low-speed wind tunnel test for active flutter suppression of a two-dimensional wing model with trailing edge control surface.
本文简要地阐述了具有后缘控制面的二元机翼模型主动颤振抑制低速风洞试验的全过程。
The results of theoretical analysis of two-layer model and real cases showed that using Rayleigh wave to investigate the near-surface structure is feasible.
通过两层模型的理论分析和实例试算，说明利用瑞利面波进行表层结构调查是可行的。
Compared with the simulation result of wastewater-sludge two-phase model, this model is shown to better model the velocities of upper layer and surface layer of oxidation ditches.
通过与污水-污泥两相模型的模拟结果对比发现，采用该模型能够更好的模拟氧化沟上层和表层的流速。
The analysis is divided into two parts: 1 computation of the velocity flow field and water surface elevation, and 2 computation of the pollutant concentration field from the dispersion model.
分析包括两个部分：1流场速度、水面高度的计算；2根据扩散模型计算污染物浓度场。
A simple two-layer analytical model was developed to describe the process of dissolved chemical loss in surface runoff from the beginning of runoff occurrence.
本文根据地表径流中溶质流失的流动特征和物理规律，基于矢量合成概念，建立了二层解析模型，描述从降雨开始径流使水溶质在地表的流失过程。
Two-scale IR imaging model of sea surface based on rigid object is built in this paper. The scattering properties of sea surface are discussed from the aspect of active imaging.
本文在研究海面的红外成像特性中，建立了基于刚体的双尺度成像模型，从主动成像方面讨论了海面散射特性的变化规律。
The utility model provides a bamboo wood compound floor. Solid wood or artificial boards are used as base materials. The bamboo wood is used as a surface layer. The two are formed by sticking by glue.
本实用新型提供了一种竹木复合地板，它以实木或人造板为基材，以竹材为面层，二者经胶合粘接构成。
Based on the results of single-factor experiments, a quadratic regression model was established with the help of two factors central composite experimental design and the response surface method.
在单因素试验基础上，利用二因素中心组合设计原理及响应面法分析建立二次回归模型。
The theoretic mechanism on heavy metal ions partitioning problem, such as: Two Step Model, Multiple Surface Sites Model, Surface Film Model and Chemisorption Model etc.
讨论了两阶段理论模型，多重表面座模型， 表面薄膜模型和化学吸附层模型的应用；
The theoretic mechanism on heavy metal ions partitioning problem, such as: Two Step Model, Multiple Surface Sites Model, Surface Film Model and Chemisorption Model etc.
讨论了两阶段理论模型，多重表面座模型， 表面薄膜模型和化学吸附层模型的应用；
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