The paper studies the relation between assembled magnetic effect with assembled magnetic head geometry parameter further , seeks the regularity of assembled magnetic effect and assembled magnetic head geometry parameter , and offers new reference for designing electromagnetism 本研究对聚磁效应与聚磁头几何参数的关系作进一步研究,寻求聚磁效果与聚磁头几何参数间的规律,为电磁铁的设计提供新的参考依据。
The relations among milo ' s frequency , output power and geometry parameters are presented . the results show that the milo ' s frequency will decrease with the increase of the size of the resonant cavity and the output power could be optimized by modifying the cavity 研究了milo工作频率和输出功率随几何结构的各个参数的相应变化规律,结果显示milo的工作频率随小谐振腔尺寸的增大而减小,输出功率具有最佳值。
This research work mainly may be divided into following several parts : 1 ) the measurement of optical fibers ’ geometry parameters : a method based upon digital image processing is presented to measure the geometry parameters of optical fibers , which are researched in this paper 本课题的研究工作可以具体分为以下几个部分: 1 )光纤几何参数的测量:提出一种基于数字图像处理的高效、实用的方法来测量光纤的几何尺寸。
Artifical neural networks are employed for defect accurate recognition and calculation , the traditional bp neural network and wavelet basis function neural networks can successfully predict or estimate defect shape and geometry parameters , their application to the magnetic flux leakage inspection is put forward at first 将神经网络模式识别方法应用到缺陷漏磁检测中来,提出了用bp网络和小波神经网络对缺陷进行定量识别,精度高、效果好。
In this thesis the fiber distortion model ( fdm ) is presented to analyze the effect of stitching and geometry parameters on the equivalent modulus and tensile strength of the stitched composite laminates . the fiber distortion model is set up based on the microstructure of fibers near the stitch holes 为了从理论上研究缝纫对复合材料层合板面内力学性能的影响,建立了纤维弯曲模型( fdm ) ,并且分析了缝纫参数和几何参数对层合板等效模量和拉伸强度的影响。
Geometry parameters of piezocrystals and wedges in ultrasonic line phased arrays transducer ( ulpa ) have important effects on transducers performance . so far , there havent been issued papers about optimized design for geometry parameters of piezocrystals and wedges based on considering all kinds of factors 超声相控线阵换能器晶片和楔块的几何参数对换能器性能的影响很大,迄今为止,尚未见在综合考虑各方面因素的基础上提出晶片和楔块几何优化设计方法的报道。
This paper first conducts the research to the steel wire roller conveyer ball bearing rolling body and the steel wire roller conveyer spot contact question , gives the main geometry parameter of the zone of contact by the hertz contact theory , stress extreme value as well as contact body elasticity approach quantity formula , and acts according to the practical application to carry on the simplification , calculates the main parameter of the bearing zone 本论文首先对钢丝滚道球轴承滚动体与钢丝滚道的点接触问题进行研究,由hertz接触理论给出接触区的主要几何参数,应力极值以及接触体弹性趋近量的计算公式,并根据实际应用进行简化,计算出课题所研究轴承接触区的主要参数。
First , it was taken that a discuss about the effects of geometry parameters of each piezocrystal on direction parameters ( main lobe width , side lobe amplitude , elimination of grating lobes ) , amplitude of ultrasonic pressure , element viberation pattern , mutual radiation among elements , efficient test regions , ability to keep accurate and near - field distance and so on . based on the direction of ultrasonic field in ulpa deduced by ourselves . in addition , on the base of integrating all kinds of factors , it was put forward that the principle and method for optimized design of geometry parameters of piezocrystals in ulpa transducer , and its design programme and interface were compiled 首先在推导超声相控线阵换能器声场的指向性的基础上,就各个晶片几何参数对指向性指标(主瓣宽度、旁瓣幅度、消除栅瓣) 、声压幅值、阵元振动模式、阵元间互辐射、有效检测区域、精确控制能力、近场长度等方面的影响进行了论述,并在综合各方面影响的基础上,提出了晶片几何参数优化设计的原则和方法,编写了设计程序和界面。
The main achievements are as follows : the theory models of defect mfl field are set up ; based on the magnetic dipole model and finite element model , the distribution of defect mfl field is simulated in the dissertation ; the component of flux density ( magnetic filed ) parallel to the surface of pipe is detected by a circumferential array of hall probes ; the factors including defect geometry parameters , defect surface angle and shape , pipe material , field intensity , vehicle velocity , background magnetization , operating pressure and remanent magnetization and so on influence the mfl signal characteristics 采用霍尔元件作为缺陷漏磁检测传感器,获得管道轴截面漏磁场切向分量的漏磁信号;研究了缺陷外形尺寸、缺陷倾角和形状、管道材质和磁化强度、检测仪移动速度、管道背底磁场、管内压力和剩磁对漏磁信号的影响。提出了各通道增益放大、各路漏磁信号偏离调整、波形微分、数字滤波和平滑等漏磁信号预处理方法;分析了等空间采样的漏磁信号转换为等时间采样信号的必要性,研究了漏磁信号的小波去噪方法。
This paper analyses the annotated rules of the steel information of the frame column expressed in " plane method " construction drawing , sums up the expressed characteristics of the reinforcement information of the frame column , the object - oriented method is adopted to get the expressed pattern of the steel information . owing to " plane method " shop drawing steel information is expressed by geometry parameter , combine of the shop drawing and the detailed construct drawing can full express the steel information . by study of the information , this paper set up the steel parameter graph base 对“平法”施工图中框架柱钢筋信息的注写规则进行了深入的分析和研究,对完整反映框架柱钢筋的各类信息表达特点进行了归纳,在此基础上利用面向对象的程序设计方法及c + +语言建立了描述框架柱钢筋所有信息的表达模型;由于在“平法”施工图中各类构件钢筋的几何信息是一种抽象的以参数表达的信息,影响参数由图中钢筋的标注信息和标准构造详图中的构造要求确定。