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Though comparing Canny operator and center B spline dyadic wavelet, the following conclusion is proven in this dissertation: a Center B spline function has tight support and Canny operator hasn't. b Center B spline function asymptotic convergence to Gaussian function and the derivative of Center B spline function asymptotic convergence to Canny operator. c The derivative of fourth order center spline B function is more suitable as a optimal edge detector than Canny operator. d Center B spline function can balance the smoothing and approximation of original data, and the fourth center B spline function is the only optimal solution of two order smoothing problem. e The error between the valve of time-frequency uncertainty of the fourth center B spline function and the lower bound of time-frequency uncertainty does not exceed 0.143% of the lower bound. f The derivative of center spline B function can construct a stability dyadic wavelet and can give a fast algorithm for multiscale edge detection, but Canny operator can do neither.

作者给出了Canny算子与中心B样条二进小波严格的比较证明,得出如下结论:a中心B样条函数具有紧支集,Canny算子不具有紧支集。b中心B样条函数的极限收敛于高斯函数,中心B样条函数的导数收敛于Canny算子。c四阶中心B样条函数的导数比Canny算子更接近最佳边缘检测滤波器。d中心B样条函数比高斯函数更能兼顾对原函数平滑和逼近的折中要求,并且四阶中心B样条函数是二阶逼近问题的唯一最优解。e四阶中心B样条函数的时频测不准关系值与时频测不准关系下界的逼近误差不超过0.143%。f中心B样条函数的导数可以构成稳定的二进小波,存在快速的多尺度算法;而Canny算子不构成稳定的二进小波,无法给出快速的多尺度算法。

This paper focuses on the construction of true bidimensional wavelets by lifting scheme and the relevant image coding. We research the nonseparable bidimensional interpolator designed by different standards, carry out the true bidimensional wavelet decomposition and improve the SPIHT coding in order to adapt to the characteristic of true bidimensional wavelet decomposition. It is proved by experiments that the subjective and objective quality of binary tree SPIHT on true bidimensional wavelet decomposition is better than famous 9/7 wavelet under the condition of low bits compression.

本文以基于提升格式的纯二维小波滤波器组的构造为中心,研究了不同类型的二维不可分离内插滤波器,实现了图像的纯二维小波分解,并改进了SPIHT编码算法,使其适合纯二维小波的分解特点,实验证明在低比特压缩下,纯二维小波分解的二叉树SPIHT在主观和客观质量上要好于著名的9/7小波。

A shopping, entertainment and leisure complex of 25,000 square meters in the South Block opened in mid-2002. Aside from a series of international restaurants representing the flavors of the world, there are classy boutiques, accessory shops, a food court, a movie cinema, a great one-stop fitness centre as well as 88 Xintiandi Executive Residence, which offers luxurious serviced apartments. There is also an underground car-park with 220 parking spaces.

南里建成了一座总楼面面积达25,000平米的购物、娱乐、休闲中心,于二零零二年中正式开幕,除了来自世界各地的餐饮场所外,更包括了年轻人最爱的时装专门店、时尚饰品店、美食广场、电影院及极具规模的一站式健身中心,还有88个新天地套间,专门提供极尽奢华的服务,在地下还有220个停车位。

A higher moment method with the basis of Chebyshev polynomial {T_k} is presented,which is used in the reliability analysis of engineering structures.

1引言在工程结构的可靠性分析中,一次二阶矩法(包括中心点法、JC法、映射变换法和实用分析法)以及二次二阶矩法得到了广泛应用[1,2]。

Geng-Liao District, an area far from the center of Wu-Gu Township, located at the borders of San-Chung, Sin-Jhuang, and Lu-Zhou, includes the villages of Geng-Liao, Sing-Jhen, Jhu-Hua, and Jhou-Hou before the construction of the Erchong Floodway. The Floodway's construction caused a change in the district's education, religion, and society.

中文摘要所谓更寮区域,一个离五股乡中心很远,位居三重、新庄和芦洲三个县辖市交汇处的区块,在二重疏洪道辟建以前包含更寮、兴珍、竹华、洲后等村,二重疏洪道辟建让这个区域的教育、信仰中心以及社会人文上产生了变化。

The growth and nucleation rates of〓 cleavage face of YbYAB crystal are all very fast, because so many growth steps and growth centers were formed within only 2~3 second at the temperature near the saturate point. No spiral growth steps can be found, so growth mechanism is twodimensional nucleation. When the flux temperature increases for only 0.5℃ above the saturate point, the spiral melting holes are formed. The transformation from growth morphologies to melting morphologies is very sensitive to the temperature. When the temperature increases another 1℃, the spiral melting holes transform into two-dimensional nucleation melting holes.

YbYAB的〓解理面的生长及成核速度都非常快,在比饱和点低0.5~1℃的温度下,当生长2~3秒钟时,可以看到许多生长中心与生长台阶的形成,在较宽的台阶上还可以看到二维核的形成,没有看到螺旋中心,说明生长机理是二维成核生长;当温度比饱和点高0.5℃时,在〓解理面上形成螺旋状熔坑,这表明形貌由生长到熔化的转变与温度的关系是非常敏感的;当温度比饱和点高1.5℃时,螺旋状熔坑转变为二维成核状熔坑。

The solutions of ProblemⅠ,ⅡandⅢare discussed by using the generalized conjugate gradient method. When the equation is consistent, the solutions such as symmetric, skew-symmetric, centrosymmetric, centroskew symmetric, reflexive, antireflexive, bisymmetric or symmetric and antipersymmetric are successfully found; When the equation is inconsistent, the least-squares solutions such as symmetric, skew-symmetric, centrosymmetric, centroskew symmetric, reflexive, antireflexive, bisymmetric or symmetric and antipersymmetric are also found successfully. The generalized conjugate gradient method has the following traits:(1) It can judge automatically the information of solutions.

利用广义共轭梯度法,讨论了问题Ⅰ、Ⅱ和Ⅲ解的情况:当方程相容时,研究了方程的一般解、对称解、中心对称解、自反矩阵解、双对称解、对称次反对称解及其最佳逼近等问题;当方程不相容时,研究了方程的最小二乘一般解、最小二乘对称解、最小二乘中心对称解、最小二乘自反矩阵解、最小二乘双对称解、最小二乘对称次反对称解及其最佳逼近等问题。

Metaphysis and periphery of the 2nd center of ossification are enhanced more intensely than the central regions of 2nd ossification center. The enhancements in all regions declined with age.

干骺端红骨髓和二次骨化中心周边红骨髓比在骨骺二次骨化中心中央区域的黄骨髓强化更明显,但它们的强化程度均随年龄的增长而逐渐减弱。

A systematic analysis of the icosahedral hierarchic structure in the 3D icosahedral quasicrystal and its approximants have been made. There is an icosahedron at the center surrounded by 12 icosahedra. If two neighboring icosahedra are vertex-sharing, the multi-shell Mackay cluster consisting of 127 atoms will form. If two neighboring icosahedra penetrate into each other, the multi-shell Samson-Bergman-Pauling cluster consisting of 137 atoms will form.

系统地分析了三维二十面体准晶的近似晶体相中具有二十面体对称的等级结构,中心1个二十面体,周边12个二十面体,如两个相邻二十面体共顶点连接,得出的是由127个原子构成的Mackay球形原子簇;如两个二十面体互相穿插,得出的是由137个原子构成的Samson-Bergman-Pauling球形原子簇。

A deviation to enable business card printing and membership card making more neatly away material; business card printing and membership card Studio Center-drum for double-deck, using thermostatical hollow water circulation system structure, plated nickel plating avoids corrosion, Nano-imprint lithography drum machine, safe and reliable braking equipment; spam satellite business card printing and membership card, four business card printing and membership card production unit in the Centre of coining drum distribution around the business card printing and membership card making support adoption of the integral structure, intensity that cannot be easily; Center for the imprint drum version, roller roller, using separate servo motors between the gearless, Business card printing and membership card making length is not supported by gear pitch in roll-wide choice; business card printing and membership card making pressure, roller and roller pressure singlein servo motor and with memory with two types of regulation, accurate and rapid adjustment; closed ceramic Roller blade device ink to ensure that the business card printing and membership card making ink stability, blade-like device for pneumatic compression; taojian the plate cylinder, taojian-reseaus and roller, the portal structure of push-pull roller and taojian beckenbachannular roller to replace a simple and quick; roller servomotor-driven business card printing and membership card production and business card printing and membership card making machine be a certain speed, stopping the slow down to prevent the ink roller network hang dry knot, splash-proof ink installed equipment downtime or roller pressure, from the printing plate out of arrive﹖, stop to ink, the plate cylinder the full delivery from the pressure to keep the printing plate clean; stainless steel-monlchamus tuhung-glass to prevent ink prints get dirty; dryer direct to the wind, air flow loss small high efficiency, reduces noise scene, new oven heat energy to secondary structures, control temperature control system using intelligentized; traction roll at the same time acts as both a cooling rolls, new structure increases cooling effect.

纠偏,使制卡和会员卡制作走料更加整齐;制卡和会员卡制作部中心大滚筒为双层空心式,采用恒温水循环系统结构,表面镀镍处理可避免锈蚀,中心压印滚筒采用机械制动装置,安全可靠;卫星式制卡和会员卡制作方式,4个制卡和会员卡制作单元分布在中心压印滚筒周围,制卡和会员卡制作支架采用整体式结构,强度好不易变形;中心压印滚筒、版辊筒、网纹辊之间采用独立伺服电机无齿轮传动,制卡和会员卡制作长度不受齿轮节距限制,在版辊范围内任意选择;制卡和会员卡制作压力、网纹辊与版辊之间的压力分别用伺服电机调整,并具有记忆功能,调整有两种调节方式,精确调整与快速调节;陶瓷网纹辊封闭刮刀装置供墨,可确保制卡和会员卡制作过程中油墨稳定饱满,刮刀装置为气动加压;套筒式印版滚筒,套筒式网纹辊筒,门式推拉式结构使套筒版辊与套筒网纹辊更换简单快速;网纹辊由伺服电机驱动,制卡和会员卡制作时与制卡和会员卡制作机保持相对一定的速度,停机时则放慢速度匀墨,防止网纹辊网坑枯结,两边安装防油墨泼溅装置,在停机或离压时,网纹辊立即从印版脱离开来,停止给墨,印版滚筒把墨完全传递后离压,保持印版清洁;不锈钢接墨斗,防止油墨滴漏蹭脏印品;干燥箱采用直接进风型式,风量损失小效率高,减小了现场噪音,新型烘箱结构热能可二次利用,控制采用智能化恒温系统;牵引辊可同时兼作冷却辊使用,新型结构增大了冷却效果。

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推荐网络例句

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在,'歼灭战perfuming自己与胡努特,那麼,他来到和SAT 。

The shamrock is the symbol of Ireland and of St.

三叶草是爱尔兰和圣特里克节的标志同时它的寓意是带来幸运。3片心形叶子围绕着一根断茎,深绿色。