Poincaré Inequalities for Bounded Jump Processes

A lot of forms and applications have been found in Poincaré inequality, but the optimum constants satisfying Poincaré inequality have not been estimated. This paper estimates the optimum constantsλ_0 and λ_1 satisfying Poincaré inequality by using isoperimetric constants. It is λ_0≥k_0~2/(2R) and λ_1≥k'_1~2/(2R).     

Poincaré Inequalities on a Countable Set E and Ω={x:0≤x_i≤a, i=1,2,…,n}

IntroductionPoincaréinequalitiesarewidelyappliedinmanyfieldssuchasstochasticanalysis,functionalanalysisandeigenvalueestimate. AlotofresultsaboutPoincaréinequalitieshavebeenobtained[1-4], mostofthemwerebasedontheboundeddomaininndimen sionalEuclideanspace…     

铁路隧道通风方式的探讨

本文基于对隧道通风功率消耗的计算,论述了不同隧道通风方式的适用范围。     

建筑工程若干质量通病的剖析与对策

对建筑工程时常发生的若干质量问题的形成原因进行了分析，并针对性地提出了预控的办法，这些办法经实践证明确有成效。