查询词典 surfaces

On the basis of micro surfaces redrawing, the surfaces were profiled through different directions.

在微观表面重现的基础上，对不同方向的表面粗糙度进行探测。

The main content reads as follows: Chapter 1 gives a survey on the three methods by which regular geometric modeling can be rended, including parametric curves/surfaces modeling method, algebraic curves/surfaces modeling method and subdivision. Moreover we introduce in greater detail about two means for subdivision which fit into two class: geometric subdivision and algebraic subdivision.

全文主要内容如下：第一章首先对CAGD中构造&规则几何形体&的三类造型方法：参数曲线、曲面造型方法，代数曲线、曲面造型方法及细分法——曲线、曲面的离散化造型方法，作了较系统的综述，并对两类主要的细分法——几何方法与代数方法，作了较详细的介绍。

Traditionally, a surface is usually scatted in an array of 3D data points which are topologically connected by rows and columns to form a rectangular mesh. This method can't meet the requirement of description and measurement for some complex surfaces. On the basis of tracing border points, a new method is proposed to deliver 3D data points of surfaces, which are topologically constructed with optimum rectangular and triangular mesh. In order to measure surface efficiently and safely with NC machine, an optimization of measurement paths is proposed to avoid interference between the measuring tool and the surface with holes. The curve design is the basis of surface modeling.

数控测量技术的发展为测量自动化、集成化、智能化提供了可能，而对于复杂曲面的自动测量规划则是测量技术中的难点问题，平行截面等数目测点分布和四边拓扑测点分布规划方法，不论在测点分布的合理性上还是在网格结构的优化方面，均难以满足形状或边界较复杂曲面的离散化描述和曲面造型的要求，为了实现任意拓扑曲面的自动测量，本文对复杂曲面的合理离散化描述和自动测量问题进行了研究，提出了基于边界跟踪、优化网格的测点自动分布规划和四边、三角混合网格的生成方法：同时对具有孔洞或测量干涉凸台等非完整曲面的测量路径优化问题进行了研究，提出了路径优化方法。

Instead of large surfaces and connections with their transitions nearly always characterised by a change in materials and colours, the layering technique stratifies the various surfaces flowing into one another, with clearly defined seams taking on a functional role, for example in the arrangement of light sources and venting nozzles.

而不是表面的大型几乎总是在材料和色彩变化特征的过渡连接，分层技术stratifies的各种表面再流入到一个明确界定的职能作用上采取接缝，在光源的安排，例如和排气喷嘴。

The mechnism of this method, the properties of the sulfurized GaAs (100) surfaces and the effects of the sulfide treatments are carefully studied. Two practical applications of the S〓Cl〓 treatment have been presented. They are:. the use of S〓Cl〓 treatments on the preparation of GaAs (100) substrate surfaces for the ZnSe MBE growth and the treatments of the GaAs HBT devices. The dc characters of the HBT are greatly improved.

作者对该方法的机理，钝化后GaAs表面的性质及钝化效果进行了系统的分析，并找出S〓Cl〓钝化GaAs表面完整的工艺条件，把这种钝化方法进行了实际应用。S〓Cl〓在GaAs表面MBE生长ZnSe的预处理中取得了成功，还利用S〓Cl〓处理GaAsHBT器件，使其直流特性得到明显的改善。

These rough surfaces have been analyzed by a fractal theory,and a three-dimensional Weierstrass-Mandelbrot function has been used to simulate the topographies of the rough surfaces.

这些参数是基于所测样品大小和仪器测量精度得出的，而分形理论的处处连续不可导及其自相似性则显示出了很好的互补特性[3，4]。

The lens axicon is based on the use of the spherical aberration of the mirror surfaces,which is inexpensive and easy to manufacture into a element with large apertures as compared with diffractive axicons,refractive cone axicons,and earlier lens axicons with aspheric surfaces;the opaque disk can offer the Bessel beams with long non-diffracting distances,and the diameter of the central peak is adjusted by choosing the focal length of the collimating lens;the tunable fluidic conical lens is a new device for generating Bessel beams,which can obtain the Bessel beams with different parameters by varying the refractive indexes of the solution which is filled in the device.

双透镜轴棱锥法主要基于透镜球面像差的运用，与衍射轴棱锥、折射轴棱锥和早期的非球面轴棱锥相比，具有加工简单、便宜，易于制作大尺寸的特点；不透明障碍物法得到的贝塞尔光束具有很长的无衍射距离，其直径可通过选择不同焦距的准直透镜来得到调节；可调流体轴棱锥是一种产生贝塞尔光束的新型器件，它可以很容易地通过改变注入器件的液体的折射率来得到不同参量的贝塞尔光束。

To describe and smooth curves and curved surfaces in finite element simulation, a method for modifying die surfaces in plate deforming simulation is proposed.

为解决在有限元中曲线、曲面的描述和光顺问题，提出一种适合有限元模拟的模具曲面修正方法。

Based on a large number of references,data and documents,a comprehensive comment is made on the present situation and the development of the technology of precision grinding and polishing die and mould with free-form surfaces by robot,and this paper presents key technology of grinding and polishing die and mould with free-form surfaces by robot,which includes the movement programming method for grinding and polishing tool and the method of grinding and polishing tool path generation.

在阅读和消化大量国内外文献资料的基础上，本文对模具自由曲面的机器人自动精加工技术做了较为全面的综合评述，重点介绍了机器人自动打磨和抛光精加工模具自由曲面的关键技术—加工工具的轨迹规划方法和轨迹生成算法。

Firstly, a new method called equal safety factor K' is presented for multi-slide surfaces or double-slide surfaces mode, which is obtained by modifying the wedge method.

坝基抗滑稳定问题中，软弱结构面概化为多滑动面的情况相当常见，而规范对此并未给出明确的校核方法。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。