1、

Based on H ∞ control theory, the feedforward Active Noise Control ( ANC) model of one dimensional sound field in a duct is presented. The design problem of feedforward controller is transformed into the standard problem of H ∞ control.

本文运用H∞控制理论建立管道内一维声场的前馈式噪声主动控制模型,将前馈控制器设计问题转化为标准的H∞控制问题。

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In this paper, the two dimensional sound field is analysised by boundary element method and numerical formulars are brought out after three different procedures are compared.

本文将边界元法应用于二维声场分析,给出了以第二类汉克尔函数为基本解的数值计算公式,比较了处理奇异积分的三种不同方法。

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3、

Boundary element analysis for two dimensional sound fied

二维声场的边界元分析

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Testing method for dimensional change in steam pressing

织物蒸汽压处理后尺寸的变化率试验法

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Testing method for dimensional change of garments: automatic home laundering

测定服装尺寸变化试验法:家庭自动洗衣机洗涤法

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Testing method for dimensional change of wool cloth: relaxation method

毛织物尺寸的变化率测定:松弛试验方法

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The principle of human's stereovision and the important function of binocular parallax in the development of stereovision are analyzed, which forms the psychological and physiological basis of three-dimensional imaging system.

系统地说明了人的立体视觉的机理及双眼视差在人的立体视觉的形成过程中的重要作用和闪烁感觉产生的原因,并以此作为显微立体成像系统的生理学和心理学依据;

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8、

Present study was to report electrically assisted photocatalytic degradation of direct sky blue aqueous solution by three phase three dimensional electrodes.

以500W高压汞灯为光源,在TiO2光催化剂和电催化剂同时存在下,联合多相三维电极技术与光催化技术,对直接湖蓝5B水溶液进行了电助光催化降解的研究。

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Three dimensional finite element analysis of a 1000 blooming mill stand

1000初轧机机架的三维有限元分析

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Three-dimensional network simulation on fissures and the stability analysis on random wedge blocks

基于三维裂隙网络模拟的随机楔体稳定分析

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In order to combine the advantages of 2D vector data and 3D terrain data, the research of the GIS based on the blended data is becoming hot, while the key issue is the data integration and real-time rendering between the 2D vector data and three-dimensional terrain.

为了同时拥有二者的优点,基于混合数据的地理信息系统逐渐成为研究的热点,它的关键问题就是二维矢量数据与三维地形数据之间的融合及实时渲染。

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Synthesis, Thermal Decomposition and Crystal Structure of Two-Dimensional Net work Binuclear Complex [ Ca_2 ( C_ ( 10) H_8N_2O_4)_2 ( DMSO)_2 ( H_2O)_4] · 2DMSO

二维网状结构双核配合物[Ca2(C(10)H8N2O4)2(DMSO)2(H2O)4]·2DMSO的合成、热分解及晶体结构

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Dimensional Analysis Method Application to Similarity Criterion Inference

因次分析法用于相似准则推断

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The method adopts the frequency domain masking technique to mask the peak fields of the radar echos' Fourier transform data, and uses the fractional correlation comprising of Fractional Fourier Transform ( FrFT) and inverse Fourier transform to detect the ARM only in one-dimensional searching.

该方法利用雷达回波的频域(Fourier变换)数据,根据尖锋作遮隔处理后,直接运用基于分数阶Fourier变换(FrFT)和Fourier逆变换的分数阶相关方法,通过一维搜索来检测ARM。

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Monte Carlo technique has two obvious advantages, the first is very flexible and easy to implement and the second is estimated error and convergence rate and independence of dimension of solving problem, which can be able to solve multiple high-dimensional derivative securities pricing.

其中蒙特卡罗技术由于具有比较灵活且易于实现、估计误差及收敛速度与解决问题的维数独立等两个明显优势,从而能够较好地解决基于多标的变量的高维衍生证券的定价问题。

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Conclusion Combining volume rendering reconstruction with surface rendering reconstruction overcomes the defects of surface rendering reconstruction that is lack of internal anatomical information, which provides a new method for three-dimensional reconstruction.

结论面绘制与体绘制相结合的重建方法克服了面绘制缺乏内部解剖信息,过于模式化的缺点,为三维重建提供了一种新的研究方法。

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Further study on the two-dimensional leakage magnetic testing system for steel pipes

钢管二维漏磁检测系统的再研究

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Random Vortex Method for Two-Dimensional Flow past Bluff Body

钝体绕流的随机涡方法

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A series of lasers mounted on a specially equipped Quad Bike scanned the coastal terrain capturing millimetre-accurate measurements for a three-dimensional model of the rock and soil surface.

一连串的激光器装在一辆经过特别改装的自行车四方扫描沿岸地形捕捉毫米精确测量了三维模型中的岩石和土壤表面。

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Based on the principle of binocular stereopsis, three-dimensional reconstruction of the nucleus isthmus ( NI) in the frog ( Rana nigromaculata) has been realized by using a microcomputer system.

本文根据双眼立体图对原理,利用微型计算机系统对黑斑蛙(Rana nigromaculata)中脑峡核(NI)进行了三维重建。

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