For the first time , the coaxial ridge - disk - loaded cylindrical waveguide as sws is presented . its dispersion equation and the expression of coupling impedance are given by application of the field matching method . a series of numerical results show that the influence of structure dimensions on the dispersion characteristics and interaction impendance 三、创造性地提出脊加载同轴膜片圆波导慢波结构,并对其采用严格的场匹配法,详细推导了色散方程和耦合阻抗表达式,并得到一系列有关系统结构参量与色散和耦合阻抗之关系的数值模拟结果。
The main work and achierement are as following : ( 1 ) by using shock impedance matching technique and electric probe method , 5 shots of impact experiments were conducted to measure the hugoniot equation of state for enstatite ( mg0 . 92 , fe0 . 08 ) sio3 with the average initial density 3 . 05g / m3 from shock pressure 50 gpa to 115gpa , using two stage light gas gun 本文研究取得的认识主要有以下几点: ( 1 )用阻抗匹配法和电探针技术在80 115gpa压力范围内对平均初始密度为3 . 05g / cm ~ 3的顽火辉石样品进行了5发hugoniot状态实验测量。
The main works of this dissertation are list as following : 1 . basing on the basic theories of resonator , studied the common method of resonator researching . programmed with matlab to calculate the numerical solution of exceeding equation in coaxial cavity , not take loss into account . basing on the field - matching theory , studied cavity with abrupt transitions structure at both ends ; 2 从谐振腔基本理论入手,研究了分析谐振腔的一般方法;并用matlab编程计算了不考虑损耗的同轴谐振腔的超越方程数值解;根据场匹配法研究了两端突变及渐变结构谐振腔; 2
The goal of this paper is to obtain a method that can compute the kc parameter of each higher mode rapidly and precisely , and then write corresponding programs . on the basis of foreign and domestic references , after carefully comparison , the transverse technique of the mode matching method is adopted in this paper 本课题的研究目标旨在得到一种能快速、精确地计算脊波导中主模及各高次模kc的有效方法,并编制相应的程序。在广泛查阅国内外相关资料的基础上,反复比较,本文采用了模式匹配法的横向谐振技术以得到有关kc的特征方程。
It discusses and analyzes about automatic word segmentation methods for the chinese language emphatically . moreover it gives the application expectation among this system a method of word segmentation based on the reverse directional maximum matching method . it also proposes that the key of the word segmentation still needs an intact and rational word segmentation dictionary 本文首先研究和讨论了基于自然语言的语义分析方法,对汉语的自动分词方法进行了着重讨论和分析,并给出了一种基于反向最大匹配法的分词方法在本系统中的应用展望,提出分词的关键还需要一个完整合理的分词词典。
The author has a theory analysis on registration and its limitations , and then provides two schemes , one is manual registration and the other is automatic registration . in the automatic registration , the template registration is selected to deliver the automatic global registration . and the similarity measurement is based on the histogram " entropy of differences - based measures which makes the registration to be robust and efficient for real - time digital subtraction 所以此时需要对剪影图象中的造影片和蒙片进行配准,本文首先进行了配准的理论分析并且提出配准的局限性,进而实现了两类配准,一类为人工配准,另一类为自动配准,在自动配准中主要采用了模板匹配法进行整体配准。
In the image preprocessing that includes image smoothing and linear gray level transformation , the author brings forward a mended linear gray level transformation based on mean of gray value to enhance the image contrast . in the segmentation the paper presents an arithmetic taking the area of the pointers and construction feature of the water meter into consideration , which can extract the part of pointers in the special space of the water meter , and then binarizes image using a dynamic threshold based on the area of the pointer . the design can enhance the recognition rate for the next step 在预处理中提出了一种基于灰度期望的分段线性变换;对水表的图像分割,提出基于面积和结构信息的二值化自动分割,包括基于结构和灰度特征的哈夫变换分割法(指针信息区的提取)和基于指针面积的特征的阈值分割(指针提取) ;针对指针图像的非均匀光照、背影等干扰,提出基于多特征的分区模板匹配法对指针的方向进行识别,从而计算出读数。