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Abstract: In order to train excellent engineers for industrial, Electronic Engineering Division of Beijing University of Technology attempts to establish a professional case library. The development and implement of the case library stimulate enterprises involved deeply. This paper presents one typical case called Classroom Response System(CRS). The design of CRS, touch screen display and wireless transceiver module are described, which offers useful teaching materials and improves students’ ability of engineering practice and teamwork spirit. In addition, enterprises can easily upgrade this case for the product. Case library provides a new approach to develop university-enterprise win-win strategy. [Copyright &y& Elsevier]

The eight heavy metals Cr, Mn, Co, Ni. Cu, Zn. Cd, and Pb have been determined in samples of coral Porites lutea collected from Dafangji Island waters (21° 21'N, 111° 11'E), Dianbai County, Guangdong Province, China, by the ICP-MS method. The samples represent the growth of coral in the period of 1982-2001. The results showed that the waters were polluted by the heavy metals Cu, Ni, Zn, and Ph in certain years, but not by other metals. The contamination may have come from industrial sources, including electroplanting, metallurgy, mining, and aquatic industries in the coastal areas. The correlation coefficients among the metals and climatic and economic factors indicate that the metals Ni, Zn. and Cd behave similarly. Copper and Mn are positively correlated, and cobalt is negatively correlated with Cr. Ni, Zn, and Cd. Lead is not correlated with any other metals but is correlated with sea surface water temperature, air temperature, GDP and industrial-agricultural production in Dianbai County. Lead in corals is related to the enhanced pollution level of ocean waters as a result of increased industrial activities. [ABSTRACT FROM AUTHOR]

This paper studied the eco-anatomical characteristics of Sorphora davidii leaves at the elevations of 1,650, 1,750, 1,850 and 1,950 m in the upper reaches of Minjiang River dry valley. The indices investigated were leaf length (LL), leaf width (LW), LL/ LW, leaf area, leaf thickness, leaf epidermal thickness, leaf palisade mesophyll thickness (P), leaf spongy mesophyll thickness (S), P/S, leaf cutin membrane thickness, leaf stomatal density and area, leaf epidermis cell density and area, and leaf pubescence length and density. The results showed that the leaves of S. davidii were elliptic, with an area 0.144 approximately 0.208 cm2 and a thickness 171.58 approximately 195.83 microm. The mesophyll was significantly differentiated into palisade and spongy. The thickness of palisade mesophyll was 69.83 approximately 82.42 microm, that of spongy mesophyll was 62.00 approximately 80.67 microm, and P/S was 1.14 approximately 1.01. Upper epidermal thickness was 14.03 approximately 15.33 microm, while lower epidermal thickness was 13.88 approximately 16.17 microm. The stomatal density, stomatal area, epidermis cell density, epidermis cell area, pubescence length, and pubescence density were 13.71 approximately 15.02 mm(-2), 249.86 approximately 280.43 microm2, 160.54 approximately 178.43 mm(-2), 557.43 approximately 626.85 microm2, 186.51 approximately 260.99 microm, and 18.29 approximately 32.27 mm(-2), respectively. With increasing elevation, the leaf area, leaf thickness, palisade mesophyll thickness, spongy mesophyll thickness, stomatal area, epidermis cell area and pubescence density were increased, while cutin membrane thickness, epidermis cell density, pubescence length, and stomatal density were decreased. There was no significant difference in LL/LW, P/S, epidermal thickness and stomatal density along the elevation gradient.