A Reflexive Operator on the Space l~2
tao chang li 1; huan zheng liang 2; hu yong 2 (1.college of info science & engg; sust; taian 271019; china; 2.taishan college; taian 271000; china)
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Discussion on Waterproof Principles for Traffic Tunnel
sun guo fu 1; li xing gao 2; liu wei ning 2 (1.college of architectural engg; beijing polytechnic university; beijing 100022; china; 2.college of civil and architectural engg; northern jiaotong university; beijing 100044 china)
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Applications of AC=BD in Differential Equations
zhang yu feng 1; 2 ; yan qing you 1; kong ling chen 2; dong huan he 2 (1.dept.of basic courses; sust; taian 271019; china; 2.dept.of applied math.dalian university of technology; dalian 116024; china)
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