cordic methods describe essentially the same algorithm that with suitably chosen inputs can be used to calculate a whole range of scientific functions including sin, cos, tan, arctan, arcsin, arccos, sinh, cosh, tanh, arctanh, log, exp, square root and even multiply and divide. the method dates back to volder [1959], and due to its versatility and compactness, it made possible the microcoding of the hp35 pocket scientific calculator in 1972. here is some code to illustrate the techniques. ive split the methods into three parts linear, circular and hyperbolic. in the hp35 microcode these would be unified into one function (for space reasons). BEcause the linear mode can perform multiply and divide, you only need add/subtract and shift to complete the implementation. you can select in the code whether to do the multiples and divides also by cordic means. other multiplies and divides are all powers of 2 (these dont count). to eliminate these too, would involve ieee hackery.
标签： essentially algorithm describe suitably
上传时间： 2017-03-02
上传用户：litianchu
The double-density DWT is an improvement upon the critically sampled DWT with important additional properties: (1) It employs one scaling function and two distinct wavelets, which are designed to be offset from one another by one half, (2) The double-density DWT is overcomplete by a factor of two, and (3) It is nearly shift-invariant. In two dimensions, this transform outperforms the standard DWT in terms of denoising however, there is room for improvement BEcause not all of the wavelets are directional. That is, although the double-density DWT utilizes more wavelets, some lack a dominant spatial orientation, which prevents them from being able to isolate those directions.
标签： double-density improvement additional critically
上传时间： 2017-04-03
上传用户：dongbaobao
This project shows the temperature on a three digit 7-segment display, it measures the temperature from -9.5 to 99 degrees Celcius in 0.5 C steps, or from 0 to 210 degrees Fahrenheit in 1.0 degrees steps. BEcause of the LED display the temperature is also readable in the dark.
标签： temperature the measures project
上传时间： 2017-04-16
上传用户：xuanjie
TreeMenu Component ================== The TreeMenu is a descendant of TTreeView. It is a "stealth-realese" BEcause the TreeMenu is created only run time and it changes a design time defined simple TreeView to self. Using it is very simple. Please see the demo files. Author: ======= Pal Sitkei sitkei@chello.hu
标签： TreeMenu descendant Component TTreeView
上传时间： 2013-12-21
上传用户：gtf1207
This is the Reference Manual for the MySQL Database System. It documents MySQL up to Version 5.0.1-alpha, but is also applicable for older versions of the MySQL software (such as 3.23 or 4.0-production) BEcause functional changes are indicated with reference to a version number.
标签： MySQL Reference documents the
上传时间： 2014-01-17
上传用户：shinesyh
solvin Parbolic forms of PDE explicitly. The error is O( h2+k2) or O(2,2) , it doesn鈥檛 develop the explicit local truncation error BEcause it is unconditionally unstable and should not be used in any calculation.
标签： explicitly Parbolic develop solvin
上传时间： 2014-01-19
上传用户：xfbs821
describe the operation of theARMcore from a product developer鈥檚 perspective with a clear emphasis on software. BEcause we have written this book specifically for engineers who are experienced with embedded systems development but who may be unfamiliar with the ARM architecture, we have assumed no previous ARM experience.
标签： perspective theARMcore operation developer
上传时间： 2017-05-01
上传用户：AbuGe
The frequency domain plays an important role in image processing to smooth, enhance, and detect edges of images. Although image data typically does not include imaginary values, the fast Fourier transform (FFT) has been used for obtaining spectra. In this paper, the fast Hartley transform (FHT) is used to transform two-dimensional image data. BEcause the Hartley transform is real valued, it does not require complex operations. Both spectra and autocorrelations of two-dimensional ultrasound images of normal and abnormal livers were computed.
标签： processing frequency important enhance
上传时间： 2014-01-08
上传用户：1051290259
C is a general-purpose programming language. It has been closely associated with the UNIX operating system where it was developed, since both the system and most of the programs that run on it are written in C. The language, however, is not tied to any one operating system or machine and although it has been called a ``system programming language BEcause it is useful for writing compilers and operating systems, it has been used equally well to write major programs in many different domains.
标签： general-purpose programming associated operating
上传时间： 2014-01-14
上传用户：我干你啊
This is a desktop application written in java which sends email using gmail smtp. You do not need to go to the browser to send email. If you do not have a gmail account that is ok too BEcause you can send email by a default account and of course by your own account. You need jdk 1.6 or higher to run it.
标签： application desktop written email
上传时间： 2014-01-14
上传用户：kernaling
