查询词典 geometric

Methods The idealized two-dimensional geometric model of cirsoid aneurysm was established.

构建了二维理想化的蜿蜒型脑动脉瘤（有2个动脉瘤）几何模型。

The computation analysis indicates that increasing the aperture of the concave focusing transducer, decreasing it's geometric focal length or raising it's central working frequency can improve the transverse and axial resolutions of the system simultaneously, but changing the dividing proportion of the transducer affects the two kinds of resolution differently. On compromisingly considering several factors including the exciting mode, the focusing ability and the radiation force effect, the concave focusing transducer should be divided into two equal-area parts.

计算研究表明：增大凹球面换能器的口径、减小几何焦距和提高中心频率均可以提高系统的侧向分辨率和轴向分辨率；但改变凹球面换能器的分割比例对两种分辨率影响不尽相同综合考虑超声换能器激励、聚焦性能以及产生的辐射力效果等因素，则换能器应按等辐射面积原则分割为宜。

Here in our department, the Geometric-Optics is a 3-credit, 3-hour per week, one-semester course. There are three consecutives parts in the one-semester lecture:The 1st part :the nature of light,the related theorems about reflection and refraction, image formation.

本系之几何光学是一学期、三学分、每周三小时的课程，教学内容大致包含以下三部份：一、介绍光的性质、在介面上反射、折射之有关定理、成像的原因及应用。

At present, the ability of counteracting geometric attacks hasnt completely achieved the request of application.

目前数字水印算法的抗攻击能力还不能完全达到应用的要求，几何变换攻击被认为是提高水印算法鲁棒性的关键问题。

This paper is original from "On-line Measuring System for Cragged Surface on Special Working Conditions", supported by the Science and Technology Research Foundation of Anhui Province. One aim of this project is to research on the technique of measuring geometric parameters on train wheel profile applying stereovision measurement technology.

本论文所研究的课题来源于安徽省重点科研项目&特殊工况异形曲面在线检测系统&，此项目研究的目的之一是应用视觉测量技术检测火车轮轮缘踏面的轮廓几何参数。

Aiming at researching on the theory of the shaft-kind parts form error evaluation and its application, on the basis of the analysis for the geometric model of the roundness error and cylindricity error, the linear programming models of the enclosure evaluation were proposed. According to the features of the proposed models, the solution of the optimization algorithms of linear planning was discussed to obtain accurate evaluation results.

为了对轴类零件形状误差评定理论及应用进行研究，在分析轴类零件的圆度、圆柱度误差评定几何模型的基础上，建立了包容拟合评定的规划数学模型，并针对模型的特点，探讨了使用线形规划的单纯形优化算法进行规划模型的求解，从而获得精确的形状误差评定结果。

Description: The technology shall be applied in finishing of thin-wall cylinder sleeve, required to reduce the geometric tolerances, including roundness tolerance, cylindricity tolerance and coaxiality tolerance.

内容说明：该技术应用在薄壁缸套的精加工方面，要求降低圆度，圆柱度，同轴度等形位公差。

If you browsed the book 《western art 》wrote by Jacques Debi chi ,etc four European professor ,then you can see the authors wrote in the page of this sentence: The new expression of variant, free space, colour. From lyrical action or the abstraction of the birth of geometric shape, abandoning closed shape, mixed shape and varied materials, crushing the boundary of species: so many imaginations come into the 20th century art of thinking spirit.

如果你翻阅过由雅克·德比奇等四位欧洲教授共同撰写的《西方艺术史》，可以看到作者们在扉页写下的这样一段话：变形，色彩自由，空间的新表达方式，从抒情动作或几何中诞生的抽象化，抛弃关闭的形，形的混合，材料的多样化，粉碎种类界限：如此众多的想象来到了对20世纪艺术进行思考的精神之中。

Based on the basic equations of electromagnetic waves transmit in waveguide, then focus on three different geometric border waveguide (rectangular, deltaic, cylindrical) for discussion ,the basic equations of electromagnetic waves in rectangular waveguide , deltaic waveguide and cylindrical waveguide are got.

本文在得出求波导中电磁波的基本方程后，针对三种不同几何边界的波导管进行讨论，导出了电磁波在矩形波导、三角形波导和圆形截面的空心波导中传播的基本方程。

In the course of the impulse through underground mediator, because the physical property and the geometric property of mediator is non-uniform, wave form and wave amplitude will change very much and the impulse after shock、antenna direction figure、the couple degree of ground surface、system interfere、non-uniform of the underground mediator、reflection surface's rough cause the disturb of radiation scatter and diffract will complex the figure .

脉冲在通过地下介质的过程中，由于介质的物性和几何性质的不均一性，波形和波幅将发生较大的变化，而脉冲余振、天线方向图形、天线的地表偶合程度、系统内部的干扰、地下介质的不均匀、反射面不光滑等引起的辐射效率、散射的变化以及剖面旁侧的绕射等干扰，均使实时记录图像复杂化。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。