Home page | news | supply and demand | downloading Today is:
			Automation in line number according to increase in...	In data increase...

Home page forum news

Current position:The home page >> news >> labor controls the system >> to insert the type system technology utilization >> main text

In data increase......

String mouth communication - parity check Origin: Input time: 07-06-10 01:42:41English version Serial data in transmission process, because disturbs possibly causes information making a mistake, for example, transmission character 'E', its each is: 0,100, 0101=45H D7 D0 Because disturbs, possibly causes the shift is 1, this kind of situation, we were called appear "to harm code" How did we discover in the transmission the mistake, calls "to examine wrong" After discovered the mistake, how eliminates the mistake, calls "to correct error". Simplest examines the wrong method is "parity check", namely in outside transmission character each, transmits 1 wonderful/partner verification position again May use the wonderful verification or the partner verification Wonderful verification: All transmissions several (contain character various several with verification position) center, the "1" integer is an odd number, for example: 10,110, 0,101 00,110, 0,001 Partner verification: All transmissions several (contain character various several with verification position) center, the "1" integer is an even number, for example: 10,100, 0,101 00,100, 0,001 The parity check can examine in the intelligence transmission process the part to harm the code (1 to harm code to be able to pick out, 2 and above 2 harms code not to be able to pick out), simultaneously, it cannot correct error After the discovery mistake, only can request to reissue But because its realization is simple, still obtained the widespread use Somewhat examines the wrong method, has the automatic error correction ability If the circulation redundant code (CRC) examines and so on wrong Chief-editor: Article author: In data increase...... Hot spot article North China science and technology L-400 isolation gateway in network security domain application Digi BL2030 single trigger in "city honored project" in control system application 蓝宇 machine posture optical fiber transceiver network management system Based on grinds the auspicious EIP platform the electron intelligence banking system solution The prestige reaches the electricity to insert the type motherboard in multi- parameters guardianship meter application Person of great virtue time cold storage centralism monitoring solution EIP - grinds auspicious EVOC in the network security solution Applies under the Linux software platform the North China labor controls the industry computer The big dipper numerical code inserts type MODEM to copy in the table system in the intelligent network the application plan UNO improves the iron and steel industry supervisory system the reliability

In data increase......

	Website map
	Copyright 2006-2008