A new type of cloak is discussed: one that gives all cloaked objects the appearance of a flat conducting sheet. It has the advantage that none of the parameters of the cloak is singular and can in fact be made isotropic. It makes broadband cloaking in the optical frequencies one step closer.
标签： appearance discussed cloaked objects
上传时间： 2017-03-30
上传用户：rishian
We obtained the energy transport velocity distribution for a three dimensional ideal cloak explicitly. Near the operation frequency, the energy transport velocity has rather peculiar distribution. The velocity along a line joining the origin of the cloak is a constant, while the velocity approaches zero at the inner boundary of the cloak. A ray pointing right into the origin of the cloak will experience abrupt changes of velocities when it impinges on the inner surface of the cloak. This peculiar distribution causes long time delays for beams passing through the ideal cloak within a geometric optics description.
标签： distribution dimensional transport obtained
上传时间： 2013-12-19
上传用户：zhliu007
SQL中的单记录函数 1.ASCII 返回与指定的字符对应的十进制数 SQL> select ascii( A ) A,ascii( a ) a,ascii( 0 ) zero,ascii( ) space from dual A A ZERO SPACE --------- --------- --------- --------- 65 97 48 32 2.CHR 给出整数,返回对应的字符 SQL> select chr(54740) zhao,chr(65) chr65 from dual ZH C -- -
上传时间： 2017-04-14
上传用户：330402686
TC35i模块有40个引脚，通过一个ZIF(Zero Insertion Force，零阻力插座)连接器引出。这40个引脚可以划分为5类，即电源、数据输入/输出、SIM卡、音频接口和控制。
上传时间： 2017-04-23
上传用户：dave520l
OTSU Gray-level image segmentation using Otsu s method. Iseg = OTSU(I,n) computes a segmented image (Iseg) containing n classes by means of Otsu s n-thresholding method (Otsu N, A Threshold Selection Method from Gray-Level Histograms, IEEE Trans. Syst. Man Cybern. 9:62-66 1979). Thresholds are computed to maximize a separability criterion of the resultant classes in gray levels. OTSU(I) is equivalent to OTSU(I,2). By default, n=2 and the corresponding Iseg is therefore a binary image. The pixel values for Iseg are [0 1] if n=2, [0 0.5 1] if n=3, [0 0.333 0.666 1] if n=4, ... [Iseg,sep] = OTSU(I,n) returns the value (sep) of the separability criterion within the range [0 1]. Zero is obtained only with images having less than n gray level, whereas one (optimal value) is obtained only with n-valued images.
标签： OTSU segmentation Gray-level segmented
上传时间： 2017-04-24
上传用户：yuzsu
Basic function to locate and measure the positive peaks in a noisy data sets. Detects peaks by looking for downward zero-crossings in the smoothed third derivative that exceed SlopeThreshold and peak amplitudes that exceed AmpThreshold. Determines, position, height, and approximate width of each peak by least-squares curve-fitting the log of top part of the peak with a parabola.
标签： peaks function positive Detects
上传时间： 2017-04-26
上传用户：彭玖华
oracle中常用函数说明. SQL中的单记录函数 1.ASCII 返回与指定的字符对应的十进制数 SQL> select ascii( A ) A,ascii( a ) a,ascii( 0 ) zero,ascii( ) space from dual A A ZERO SPACE --------- --------- --------- --------- 65 97 48 32 2.CHR 给出整数,返回对应的字符 SQL> select chr(54740) zhao,chr(65) chr65 from dual ZH C -- - 赵 A 3.CONCAT 连接两个字符串 SQL> select concat( 010- , 88888888 )|| 转23 高乾竞电话 from dual 高乾竞电话 ---------------- 010-88888888转23
上传时间： 2014-11-23
上传用户：zhangyigenius
The aip file contains few Matlab routines for 1D line scan analysis, 1D scaling, 2D scaling, image brightness or contrast variation routine and rouitne for finding area between zero cossings of 1D times series.
标签： scaling contains analysis routines
上传时间： 2014-01-19
上传用户：xmsmh
This program take a two sequences with differents lengths and transform in two sequences with same length with use zero padding method.
标签： sequences with differents two
上传时间： 2017-05-27
上传用户：kikye
4 16 64 QAM plots for simulated and theoretical results for OFDM system with addition of Cyclic prefix and a zero-Forcing equalizer.
标签： theoretical for simulated addition
上传时间： 2017-06-02
上传用户：hgy9473
