Au/NiO was prepared by coprecipitation and subjected to various heat and oxygen pretreatment prior to being used to promote carbon monoxide oxidation. The most active catalyst was obtained by heating in oxygen at 300...Au/NiO was prepared by coprecipitation and subjected to various heat and oxygen pretreatment prior to being used to promote carbon monoxide oxidation. The most active catalyst was obtained by heating in oxygen at 300℃ before use and can convert CD into CO2 completely at 30℃. The relative activities of these catalysts depended on the degree of heating and oxygen exposure before use.展开更多
A Mendelsohn triple system of order v （MTS（v）） is a pair （X,B） where X is a v-set and 5g is a collection of cyclic triples on X such that every ordered pair of X belongs to exactly one triple of B. An MTS（v） ...A Mendelsohn triple system of order v （MTS（v）） is a pair （X,B） where X is a v-set and 5g is a collection of cyclic triples on X such that every ordered pair of X belongs to exactly one triple of B. An MTS（v） （X,B） is called pure and denoted by PMTS（v） if （x, y, z） ∈ B implies （z, y, x） ∈B. A large set of MTS（v）s （LMTS（v）） is a collection of v - 2 pairwise disjoint MTS（v）s on a v-set. A self-converse large set of PMTS（v）s, denoted by LPMTS＊ （v）, is an LMTS（v） containing [ v-2/2] converse pairs of PMTS（v）s. In this paper, some results about the existence and non-existence for LPMTS＊ （v） are obtained.展开更多
文摘Au/NiO was prepared by coprecipitation and subjected to various heat and oxygen pretreatment prior to being used to promote carbon monoxide oxidation. The most active catalyst was obtained by heating in oxygen at 300℃ before use and can convert CD into CO2 completely at 30℃. The relative activities of these catalysts depended on the degree of heating and oxygen exposure before use.
基金Supported by National Natural Science Foundation of China (Grant No.10771051)
文摘A Mendelsohn triple system of order v （MTS（v）） is a pair （X,B） where X is a v-set and 5g is a collection of cyclic triples on X such that every ordered pair of X belongs to exactly one triple of B. An MTS（v） （X,B） is called pure and denoted by PMTS（v） if （x, y, z） ∈ B implies （z, y, x） ∈B. A large set of MTS（v）s （LMTS（v）） is a collection of v - 2 pairwise disjoint MTS（v）s on a v-set. A self-converse large set of PMTS（v）s, denoted by LPMTS＊ （v）, is an LMTS（v） containing [ v-2/2] converse pairs of PMTS（v）s. In this paper, some results about the existence and non-existence for LPMTS＊ （v） are obtained.
