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1) axial-transfer invariability
轴移不变性
1.
Using the propagation-circle and transform-circle graphic analysis,relation of axial-transfer to rotation,and then to axial-transfer has been developed and theoretically deduced based on axial-transfer invariability,which enriched the content of axial-transfer invariability.
运用传播圆-变换圆图解分析方法,在轴移不变性的基础上发展并理论推导了轴移→旋转→轴移变换的关系,丰富了轴移不变性的内容。
2) shiftability
[,ʃiftə'biləti]
移不变性
1.
But,if an orthogonal decomposition is used,the decomposition process will have no shiftability.
但若对信号进行的是正交分解(用Daubechies小波),过程不具移不变性。
3) translation invariance
平移不变性
1.
The translation invariance of divide exactly on the integral coefficients polynomial
整系数多项式的整除平移不变性
2.
This paper gives the definition of grey topological linear space for the first time, andproves that it has some characters similar to those of ordinary topological linear space,suchas translation invariance,balance and absorbability.
给出友拓扑线性空间的定义,证明它具有与普通拓扑线性空间相类似的性质,如平移不变性,均衡性,吸收性等。
3.
NSCT has not only the properties of multi-resolution and multi-direction, but also the property of translation invariance, which is useful in eliminating the Gibbsphenomenon.
与Contourlet变换相比,非下采样Contourlet变换不仅具有多尺度、多方向特性,同时还具备平移不变性。
4) shift invariant
平移不变性
1.
The construction of NonSubsampled Directional Filter Bank(NSDFB) and àtrous wavelet transform which is full shift invariant are introduced,and a novel multi-sensor image fusion scheme based on NSDFB combining àtrous wavelet transform for multi sensor images is proposed.
分析和研究了非下采样方向滤波器组及具有平移不变性的àtrous小波变换的图像变换的优点,提出了一种基于多方向àtrous小波变换的图像融合方法。
2.
The construction of Nonsubsampled Directional Filter Bank(NSDFB) and undecimated wavelet transform which is full shift invariant are introduced,and a novel multi-sensor image fusion scheme based on NSDFB combining undecimated wavelet transform for multi sensor images is proposed.
本文分析和研究非下采样方向滤波器组及具有平移不变性的非抽样小波变换的优点,提出了基于方向非抽样小波变换的图像融合方法。
3.
The theoretical model was established in detail,the properties of rotation and shift were theoretically and practically analyzed to conclude its shift invariant speciality.
基于归一化频谱相关模型,对物体平移和旋转后的基频模进行了理论分析和实验论证,得出了物体基频模具有平移不变性的特性。
5) shift-invariant
平移不变性
1.
Like the contourlet transform method,the presented method can obtain multi-scale and multi-direction images with good multi-resolutions,and it is also shift-invariant.
该方法既保留contourlet变换方法良好的多分辨率特性,又具有平移不变性。
2.
Because the transform is not shift-invariant,cycle spinning is employed to restrain the distortion near the image edges.
并引入了循环平移消除由于小波-Contourlet变换缺乏平移不变性而产生的图像失真。
3.
Stationary Contourlet transform with shift-invariant was applied to image denoising,which could capture the intrinsic geometrical structure of image.
应用平稳Contourlet变换,具有平移不变性,且能有效表示图像几何纹理信息。
6) shift invariance
平移不变性
1.
Based on lifting wavelet transform,the nonsampled lifting wavelet transform with the trait of shift invariance was obtained by cancelling the odd and even split process of lifting wavelet transform.
该算法在提升小波变换的基础上,通过取消其奇偶分裂环节,得到具有平移不变性的非采样提升小波变换。
补充资料:MasterCAM8.0在四轴、五轴铣床加工中的应用与技巧
MasterCAM8.0新增加了多轴加工模块,但在实际加工应用中数控机床的控制器是不同的,在后置处理时,如果在MasterCAM8.0提供的后置处理文件夹Posts中找不到适合数控机床控制器的后置处理文件,或者经过编辑某通用后置处理文件后,仍不能得到与数控机床控制器相适应的后置处理文件,那么就无法将多轴加工模块得到的NCI文件转化成实际加工中可用的NC程序。 笔者在工作实践中,通过适当的转化使某些常用、典型的四轴、五轴加工在MasterCAM8.0上得以实现,并且成功后置处理成适合加工实际的四轴、五轴数控铣床控制器格式的NC程序。 一、四轴加工的应用 卫生巾切刀成型辊的数控加工主要是通过用平铣刀和锥度成型刀在XK-715M机床(带旋转轴的三坐标数控机床)上实现的。旋转轴上夹持的切刀成型辊相当于第四轴——A轴,刀具在圆柱体上走空间曲线,就得到刀刃的型面。 那么,如何建出这条卷在圆柱体上的空间曲线呢? 首先,在MasterCAM8.0中,根据切刀理论刃口展开图画出不同刀具的中心轨迹展开图,这是二维曲线。 然后,利用主菜单的转换→卷筒→串连,用串连的方式选取刀具轨迹曲线→然后设定卷筒直径、旋转轴X及曲线放置在圆柱体上的位置→确认后再作出与卷筒直径同样大小的圆柱曲面,作为4轴曲线加工的导动曲面,将空间曲线以投影方式投到圆柱面上进行加工。 虽然同样是FANUC系统,但XK-715M机床和加工中心控制器的所使用的格式稍有区别,所以在用MasterCAM后处理产生NC程序之前需修改后置处理文件MPFAN.PST。 方法如下:进入文件→编辑→*.PST→找到系统默认的MPFAN.PST文件,先作备份,如另存为MPFAN-1.PST文件,然后打开,找到下面清单中的变量rot_ccw_pos : 1,将其改为rot_ccw_pos : 0,并存盘。 # Rotary Axis Settings # -------------------------- vmc : 1 #0 = Horizontal Machine, 1 = Vertical Mill rot_on_x : 1 #Default Rotary Axis Orientation, See ques. 164. #0 = Off, 1 = About X, 2 = About Y, 3 = About Z rot_ccw_pos : 1 #Axis signed dir, 0 = CW positive, 1 = CCW positive 之后,进入“NC管理”菜单→更改后置处理文件→选中MPFAN-1.PST文件,再对NCI文件进行后置处理,产生符合XK-715M机床的NC格式。 二、 五轴加工的应用 以在FIDIA系统的T20上加工双角度叉耳内外形为例,说明用MasterCAM8.0实现T20上带固定角度的五轴加工。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条
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