In this paper, the properties of the heat diffusion semigroup {e^(t△)}_(t≥0) generated by the Hodge-deRham operator in a Riemannian manifold are discussed.
高钙高磷钒渣采用钙化-酸浸提钒后所得溶液中的杂质磷对后续沉钒及氧化钒产品质量均产生不利影响.本文采用煅烧活化硅酸钙方法去除酸性钒溶液中杂质P,通过V-P-S-H 2O系 E -pH图和lg C p-pH图对酸性钒溶液中P的赋存形式进行分析,分别研...高钙高磷钒渣采用钙化-酸浸提钒后所得溶液中的杂质磷对后续沉钒及氧化钒产品质量均产生不利影响.本文采用煅烧活化硅酸钙方法去除酸性钒溶液中杂质P,通过V-P-S-H 2O系 E -pH图和lg C p-pH图对酸性钒溶液中P的赋存形式进行分析,分别研究在高V/P比酸性含钒模拟液和低V/P比实际钒渣所得钒浸出液两种体系中硅酸钙对杂质P的脱除效果.结果表明酸性钒溶液中杂质P主要以H 2PO - 4 和H 3PO 4形式存在.煅烧活化后的硅酸钙对酸性含钒模拟液中P的脱除效果明显且选择性较强,磷去除率随煅烧温度、溶液体系pH值的增加而升高,钒损失率低于3.5%,但在实际钒渣所得酸性含钒溶液中,当磷去除率约为50%时钒损失率达15%,这是由于实际钒溶液中其他离子对脱P效果产生了不利影响,其作用机制有待进一步研究.展开更多
Using the extended Blonder-Tinkham-Klapwijk formalism, we investigate the conductance spectra of graphene ferromagnet/p wave superconductor junctions. It is found that the conductance spectra are affected by the p wav...Using the extended Blonder-Tinkham-Klapwijk formalism, we investigate the conductance spectra of graphene ferromagnet/p wave superconductor junctions. It is found that the conductance spectra are affected by the p wave pairing symmetry. The ferromagnetic exchange energy in the ferromagnet can suppress Andreev retroreflection but enhance the specular Andreev reflection in graphene ferromagnet/p wave superconductor junctions. The conductance decreases with increasing exchange energy Eh for Eh〈Er （the Fermi energy in the ferromagnet region）, but the conductance increases with increasing exchange energy Eh for Eh〉EF.展开更多
基金Supported by the Natural Science Foundation of Anhui Provincia Education Department(KJ2017A341)the Talent Project of Fuyang Normal University(RCXM201714)+1 种基金the second author is supported by the Natural Science Foundation of Anhui Province of China(1608085MA03)the Fundamental Research Funds of Tongling Xueyuan Rencai Program(2015TLXYRC09)
文摘In this paper, the properties of the heat diffusion semigroup {e^(t△)}_(t≥0) generated by the Hodge-deRham operator in a Riemannian manifold are discussed.
基金supported by the National Natural Science Foundation of China (Grant No. 11074088)
文摘Using the extended Blonder-Tinkham-Klapwijk formalism, we investigate the conductance spectra of graphene ferromagnet/p wave superconductor junctions. It is found that the conductance spectra are affected by the p wave pairing symmetry. The ferromagnetic exchange energy in the ferromagnet can suppress Andreev retroreflection but enhance the specular Andreev reflection in graphene ferromagnet/p wave superconductor junctions. The conductance decreases with increasing exchange energy Eh for Eh〈Er （the Fermi energy in the ferromagnet region）, but the conductance increases with increasing exchange energy Eh for Eh〉EF.
