Recently, ZHU Wu-jia and XIAO Xi-an introduced a propositional calculus system MP and its extension MP~*, called medium logic. Many formulas are derived from
A sequent is a pair(Г,△),which is true under an as-signment if either some formula inГis false,or some formula in △ is true.In L3-valued propositional logic,a mulisequent is a triple △|Θ|Г,which is true under a...A sequent is a pair(Г,△),which is true under an as-signment if either some formula inГis false,or some formula in △ is true.In L3-valued propositional logic,a mulisequent is a triple △|Θ|Г,which is true under an assignment if either some formula in △ has truth-value t,or some formula in Θ has truth-value m,or some formula in Г has truth-value£.Corre-spondingly there is a sound and complete Gentzen deduction system G for multisequents which is monotonic.Dually,a CO-multisequent is a triple △:Θ:Г,which is valid if there is an assignment v in which each formula in△has truth-value≠t,each formula in Θ has truth-value≠m,and each formula in Г has truth-value≠£.Correspondingly there is a sound and com-plete Gentzen deduction system G-for co-multisequents which is nonmonotonic.展开更多
传统电磁流量计大多采用交流220 V或直流24 V供电,励磁电流高达250 m A左右,耗能高,成本高。文中设计了一种基于MSP430F4794单片机的低功耗电磁流量计,采用3.6 V锂电池供电,励磁方式采用三值梯形波励磁,励磁电流仅为30 m A。围绕低功耗...传统电磁流量计大多采用交流220 V或直流24 V供电,励磁电流高达250 m A左右,耗能高,成本高。文中设计了一种基于MSP430F4794单片机的低功耗电磁流量计,采用3.6 V锂电池供电,励磁方式采用三值梯形波励磁,励磁电流仅为30 m A。围绕低功耗详细叙述了DC-DC升降压电路、三值梯形波励磁电路、信号处理电路、MSP430F4794单片机控制及外围电路。经实验测试,该电磁流量计能够满足用户需求。展开更多
文摘Recently, ZHU Wu-jia and XIAO Xi-an introduced a propositional calculus system MP and its extension MP~*, called medium logic. Many formulas are derived from
文摘A sequent is a pair(Г,△),which is true under an as-signment if either some formula inГis false,or some formula in △ is true.In L3-valued propositional logic,a mulisequent is a triple △|Θ|Г,which is true under an assignment if either some formula in △ has truth-value t,or some formula in Θ has truth-value m,or some formula in Г has truth-value£.Corre-spondingly there is a sound and complete Gentzen deduction system G for multisequents which is monotonic.Dually,a CO-multisequent is a triple △:Θ:Г,which is valid if there is an assignment v in which each formula in△has truth-value≠t,each formula in Θ has truth-value≠m,and each formula in Г has truth-value≠£.Correspondingly there is a sound and com-plete Gentzen deduction system G-for co-multisequents which is nonmonotonic.
文摘传统电磁流量计大多采用交流220 V或直流24 V供电,励磁电流高达250 m A左右,耗能高,成本高。文中设计了一种基于MSP430F4794单片机的低功耗电磁流量计,采用3.6 V锂电池供电,励磁方式采用三值梯形波励磁,励磁电流仅为30 m A。围绕低功耗详细叙述了DC-DC升降压电路、三值梯形波励磁电路、信号处理电路、MSP430F4794单片机控制及外围电路。经实验测试,该电磁流量计能够满足用户需求。