摘要：
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.
摘要：
A novel water-compatible hypercrosslinked resin modified by p-aminophenol was synthesized with chloromethylated polystyrene and p-aminophenol by Friedel-Crafts reaction. The objective of this work was to study the adsorption performances for salicylic acid onto p-aminophenol resin. The results showed that the adsorption capacity of salicylic acid onto p-aminophenol resin was superior to XAD-4 resin. It is seen that the maximum adsorption capacity is observed at pH of 3.0. It was found the adsorption dynamics obeyed the pseudo-first-order rate equation and the intra-particle diffusion was the rate-limiting step. The maximum adsorption capacity of salicylic acid for p-aminophenol resin was measured to be 283.7 mg/g with the equilibrium concentration at 404.6mg/L. The micropore structure, the pore diameter of p-aminophenol resin, the hydrogen bond between p-aminophenol resin and salicylic acid bring the larger adsorption capacity.
作者机构：
[Song, Juanjuan] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Tu, Li] Hunan City Univ, Dept Comp Sci, Yiyang 413000, Hunan, Peoples R China.
通讯机构：
[Song, Juanjuan] H;Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.
会议名称：
2011 International Conference on Future Materials Engineering and Industry Application(ICFMEIA 2011)
会议时间：
2011-01-01
会议地点：
Bali Island, Indonesia
会议主办单位：
[Song, Juanjuan] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.^[Tu, Li] Hunan City Univ, Dept Comp Sci, Yiyang 413000, Hunan, Peoples R China.
会议论文集名称：
Advanced Materials Research
关键词：
Modified fly ash;Microwave;Radiation;Cu2+
摘要：
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 pu
作者机构：
[龙立平; 王姣亮] College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, China;[徐满才] College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China;[肖谷清] College of Chemistry and Environmental Engineering, Hunan City University, Yiyang 413000, China<&wdkj&>College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China
通讯机构：
[Xiao, G.] C;College of Chemistry and Environmental Engineering, Hunan City University, China
作者机构：
[刘文英; 王威燕; 胡韬; 杨运泉; 王锋; 罗和安] School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China;[王锋] Department of Chemical and Environment Engineering, Hunan City University, Yiyang 413000, China
期刊：
SCIENCE IN CHINA SERIES B-CHEMISTRY,2010年53(5):1095-1101 ISSN：1006-9291
通讯作者：
Shan, Z.(zxshan@whu.edu.cn)
作者机构：
[Hu XiaoYun; Hu Lin; Shan ZiXing] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China.;[Luo XinXiang] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413049, Peoples R China.
通讯机构：
Department of Chemistry, Wuhan University, China
关键词：
SOLVENT-FREE;REACTION;solid;base;mixture;catalysis;CHEMOSELECTIVITY;aldehyde-ketone;REACTION;solid base mixture catalysis;chemoselectivity;aldehyde-ketone reaction
摘要：
Solvent-free reactions of aromatic aldehydes with three representative ketones,including acetophenone,acetone and cyclohexanone,have been examined under the catalysis of a low-cost inorganic base system consisting of NaOH and K2CO3.It was found that the chemoselectivity of the reactions is in close relationship with the composition of the reactants and the doublecomponent catalyst.Under the optimized experimental conditions,1,2,3,4,5-pentasubstituted cyclohexanols,α,β-unsaturated ketones and Claisen-Schmidt bicondensation products were obtained in high yields.Two Kostanecki’s triketones were separated,The composition and structure were affirmed by X-ray crystallographic analysis.
摘要：
A neutralization hydrolysis route has been used to synthesize titanium oxide nanoparticles. Transmission electron microscopy(TEM) and X-ray diffraction(XRD) characteri- zation results showed the TiO2 nanoparticles were single anatase phases when calcined at 600°C-800°C for 2h. The particle diameter ranged from 15 to 30nm. The pH value was key factor for precursor composition. When pH value 2-4, the H2TiO3 precursor with low agglomeration was obtained. As-prepared anatase TiO2 nanoparticles, during photodegradation of methylic orange under UV-light irradiation(λ=254nm), exhibited excellent activity, more than 95.5% methylic orange was degraded in 1h.
摘要：
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.
关键词：
solvent-free reaction;solid base mixture catalysis;chemoselectivity;aldehyde-ketone reaction
摘要：
Solvent-free reactions of aromatic aldehydes with three representative ketones, including acetophenone, acetone and cyclohexanone, have been examined under the catalysis of a low-cost inorganic base system consisting of NaOH and K(2)CO(3). It was found that the chemoselectivity of the reactions is in close relationship with the composition of the reactants and the double-component catalyst. Under the optimized experimental conditions, 1,2,3,4,5-pentasubstituted cyclohexanols, alpha,beta-unsaturated ketones and Claisen-Schmidt bicondensation products were obtained in high yields. Two Kostanecki's triketones were separated, The composition and structure were affirmed by X-ray crystallographic analysis.
