This paper Introduces a simple and reliable method to connect an ordinary twisted pair RS-232 up to 2048 devices and transmit the communication data more than 10 kilometers by using ZLGCAN interface card, CAN232MB converters and other equipment. The virtual serial port server makes use of CAN-bus network for data communications, guaranteeing the reliability of communic-ation, improving the RS-232 transmission distance, and simplifying the wiring process. Meanwhile user’s operation of the virtual serial port and a standard PC are compatible with the basic serial port operation. However, if there is a large number of continuous transmission of data to the case, the ac-tual serial data transfer rates is determined by the number of virtual serial port.

The present paper discussed the best initial concentration ,PH value and temperature and other factors on adsorption of Fe3+ ions by modified Hunan black tea,the results show that the dynamic adsorption model of modified black tea on Fe3+ ions was well aecorded with quasi-second dynamic equation.The activation energy (Ea) was small.

I2S (Inter-IC Sound Bus) is one of the general audio buses applied in various industrial or embedded systems. It only processes the audio data, while other signals like various codes and control signals are transmitted individually. This paper presents an approach how to construct an embedded audio system using the I2S bus to connect relevant supporting code chip and decode chip. This system can reduce the consumption of system resources drastically, therefore fluent WAV broadcast can be guaranteed. Moreover, the familiar media files, such as MPEG1, MPEG2, MP3, MPEG4 can be played through adding its decoder. The ARM chipset of the LPC2300 series is applied in this system, therefore, system’s reliability can be improved. This method can be wiedly used in vehicle- borne, ship-borne embedded flash players and portable media players.

The comprehensive utilization of fly ash mainly concentrated is in construction engineering channels, road engineering, it used to deal with waste water is full of hope. As this, it can achieve the purpose of using the waste to conduct waste. Fly ash was modified by a microwave radiation. This method was simple and easy to operate . When the dosage of Modified fly ash is 4g, the pH value is 6.2, the mixing time is 50min, the initial concentration of copper solution is 1.85mg/L ,Adsorption rate of modified fly ash on Cu2+ reached 96%.

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