铁路工程建设对城市次生环境影响分析

铁路工程建设对城市的发展起到了非常大的促进作用，但同时也相应地影响了城市的次生环境，给城市的发展带来了许多不利的影响。因此，应兴利除弊，开展城市环境综合整治，实现城市的可持续发展。     

Relations Between BZMV^dM -Algebra and Other Algebrast

Some properties of BZMV^dM-algebra are proved, and a new operator is introduced. It is shown that the substructure of BZMV^dM-algebra can produce a quasi-lattice implication algebra. The relations between BZMW^dW-algebra and other algebras are discussed in detail. A pseudo-distance function is defined in linear BZMV^dM-algebra, and its properties are derived.