Servomotors are available as AC or DC motors. Early servomotors were generally DC motors because the only type of control for large currents was through SCRs for many years. As transistors became capable of controlling larger currents and switching the large currents at higher frequencies, the AC servomotor became used more often. Early servomotors were specifically designed for servo amplifiers. Today a class of motors is designed for applica-tions that may use a servo amplifier or a variable-frequency controller, which means that a motor may be used in a servo system in one application, and used in a variable-frequency drive in another application. Some companies also call any closed-loop system that does not use a stepper motor a servo system, so it is possible for a simple AC induction motor that is connected to a velocity controller to be called a servomotor.
标签： motors Servomotors servomotors available
上传时间： 2014-08-10
上传用户：源码3
Watermarking schemes evaluation Abstract鈥擠igital watermarking has been presented as a solution to copy protection of multimedia objects and dozens of schemes and algorithms have been proposed. Two main problems seriously darken the future of this technology though. Firstly, the large number of attacks and weaknesses which appear as fast as new algorithms are proposed, emphasizes the limits of this technology and in particu-lar the fact that it may not match users expectations. Secondly, the requirements, tools and methodologies to assess the current technologies are almost non-existent. The lack of benchmarking of current algorithms is bla-tant. This confuses rights holders as well as software and hardware manufacturers and prevents them from using the solution appropriate to their needs. Indeed basing long-lived protection schemes on badly tested watermarking technology does not make sense.
标签： Watermarking watermarking evaluation presented
上传时间： 2013-12-04
上传用户：thinode
Traveling Salesperson Problem Our branch-and-strategy splits a branch and bound solution into two groups: one group including a particular arc and the other excluding this arc. 1.Each splitting incurs a lower bound and we shall traverse the searching tree with the "lower" lower bound. 2.If a constant subtracted from any row or any column of the cost matrix, an optimal solution does not change.
标签： branch-and-strategy Salesperson Traveling solution
上传时间： 2013-12-29
上传用户：璇珠官人
one of video tool Skype only in windows mobile5.0 more than running, but my task is to let it run Skype in WINCE only in windows mobile5.0 more than running, but my task is to let it run in WINCE . Leave no stone unturned when I can not get windows mobile, they thought would be needed for skype all library files to my WINCE, so perhaps will be able to run skype. 1. Used depend Show skype depends on which files. In fact, not many documents, I can remember only under the following: core.dllcommctr.dllaygeshell.dllhtmlview.dll In addition to htmlview.dll, the other documents in WINCE have (if your system does not, please IMAGE Canada on the corresponding module). Therefore, I find on the Internet htmlview.dll, the results really find
标签： running windows mobile Skype
上传时间： 2014-01-17
上传用户：miaochun888
opencv OpenCV is cross-platform middle-to-high level API that consists of a few hundreds (>300) C functions. It does not rely on external numerical libraries, though it can make use of some of them (see below) at runtime, if they are available
标签： cross-platform middle-to-high consists hundreds
上传时间： 2013-12-25
上传用户：李梦晗
This is the project README file. Here, you should describe your project. Tell the reader (someone who does not know anything about this project) all he/she needs to know. The comments should usually include at least:
标签： project the describe someone
上传时间： 2017-06-22
上传用户：450976175
The all mighty mouse: you can have more memory, you can have blue-ray discs but you are still using the mouse (and the keyboard) to control your computer. The mouse pointer lets you select objects on the screen and operate on them. What and how you operate with the mouse is pretty simple: there s an arrow on the screen that moves when you move the mouse - screen edges are the border - the area where you mouse lives. When you click it, it does something.
上传时间： 2017-07-04
上传用户：秦莞尔w
In number theory, the Euclidean algorithm (also called Euclid s algorithm) is an algorithm to determine the greatest common divisor (GCD) of two elements of any Euclidean domain (for example, the integers). Its major significance is that it does not require factoring the two integers, and it is also significant in that it is one of the oldest algorithms known, dating back to the ancient Greeks.
标签： algorithm Euclidean Euclid number
上传时间： 2017-07-17
上传用户：恋天使569
Run following Matlab commands to make sure the installation worked correctly. Unlike query function, filterdb does not load all waveforms to memory but returns filtered database object. This is useful when the resulting set of the query is too big to fit in memory. Consequent calls to read function can be made to read content of this filtered database object.
标签： installation following correctly commands
上传时间： 2013-12-30
上传用户：ainimao
The purpose of this booklet is to give you a quick introduction to VHDL. This is done by informally describing the facilities provided by the language, and using examples to illustrate them. This booklet does not fully describe every aspect of the language. For such fine details, you should consult the IEEE Standard VHDL Language Reference Manual. However, be warned: the standard is like a legal document,
标签： introduction informally purpose booklet
上传时间： 2017-07-24
上传用户：zhouchang199
