Highly dispersed metals,metal oxides and their composites on substrates have received considerable interest in catalysis and lithium-ion batteries,because of their superior properties compared with their single-compon...Highly dispersed metals,metal oxides and their composites on substrates have received considerable interest in catalysis and lithium-ion batteries,because of their superior properties compared with their single-component counterparts.In this review,we introduce the properties of supercritical carbon dioxide（scCO2） expanded ethanol,such as low viscosity,near-zero surface tension and high diffusivity.We discuss the deposition procedure and formation mechanism of carbon-based composites in scCO2-expanded ethanol.This method has been used to fabricate several carbon-based composites,such as metal and metal oxide composites deposited on zero-dimensional colloidal carbon,one-dimensional carbon nanotubes,two-dimensional graphene,and three-dimensional hierarchical porous carbon.These materials and their performance as anodic materials for lithium-ion batteries will also be reviewed.展开更多
In this paper, the hereditarily almost expandability of inverse limits is investigated, with two results obtained. Let X be the inverse limit space of an inverse system （Xα, π^αβ, ∧}. （1） Suppose X is heredita...In this paper, the hereditarily almost expandability of inverse limits is investigated, with two results obtained. Let X be the inverse limit space of an inverse system （Xα, π^αβ, ∧}. （1） Suppose X is hereditarily κ-metacompact, if each Xα is hereditarily pointwise collectionwise normal （almost θ-expandable, almost discrete θ-expandable）, then so is X; （2） Suppose X is hereditarily κ-σ-metacompact, if each Xα is hereditarily almost σ-expandable （almost discrete σ-expandable = σ-pointwise collectionwise normal）, then so is X.展开更多
In this paper we first discuss the relations between some G-M-type spaces, and the previous eight kinds of G-M-type Banach spaces are merged into four different kinds. Then we build a Generalized Operator Extension Th...In this paper we first discuss the relations between some G-M-type spaces, and the previous eight kinds of G-M-type Banach spaces are merged into four different kinds. Then we build a Generalized Operator Extension Theorem, and introduce the concept of complete minimal sequences. Some sufficient and necessary conditions under which a Banach space is a hereditarily indecomposable space are given. Finally, we give some characterizations of hereditarily indecomposable Banach Spaces.展开更多
设P表示可膨胀、σ-可膨胀、离散可膨胀、σ-离散可膨胀这四种性质之一.本文主要证明:(1)设X=lim{Xα,παβ,∧}并且每个投射πα是开满映射,如果X是|∧|-仿紧(遗传|∧|-仿紧)的,并且每个Xα都具有性质P(遗传性质P),则X具有性质P(遗传...设P表示可膨胀、σ-可膨胀、离散可膨胀、σ-离散可膨胀这四种性质之一.本文主要证明:(1)设X=lim{Xα,παβ,∧}并且每个投射πα是开满映射,如果X是|∧|-仿紧(遗传|∧|-仿紧)的,并且每个Xα都具有性质P(遗传性质P),则X具有性质P(遗传性质P);(2)如果X=multiply from σ∈∑ Xσ是|∑|-仿紧(遗传|∑|-仿紧)空间,则具有性质P(遗传性质p)当且仅当(?)F∈[∑]<ω,multiply from σ∈∑ Xσ具有性质P(遗传性质P).展开更多
基金supported by the international cooperation project(21311140166) of the National Natural Science Foundation of China and Japan Science Promotion Society(NNSFC-JSPS),NNSFC(21273222)Shandong Province Science and Technology Program(2014GGX102020)+1 种基金Higher Educational Science and Technology Program(J14LC08)the Doctoral Scientific Research Start-Up Foundation of Qufu Normal University,and the Science and Technology Program of Qufu Normal University(xkj201508)~~
文摘Highly dispersed metals,metal oxides and their composites on substrates have received considerable interest in catalysis and lithium-ion batteries,because of their superior properties compared with their single-component counterparts.In this review,we introduce the properties of supercritical carbon dioxide（scCO2） expanded ethanol,such as low viscosity,near-zero surface tension and high diffusivity.We discuss the deposition procedure and formation mechanism of carbon-based composites in scCO2-expanded ethanol.This method has been used to fabricate several carbon-based composites,such as metal and metal oxide composites deposited on zero-dimensional colloidal carbon,one-dimensional carbon nanotubes,two-dimensional graphene,and three-dimensional hierarchical porous carbon.These materials and their performance as anodic materials for lithium-ion batteries will also be reviewed.
基金Supported by the Scientific Fund of the Educational Committee of Xinjiang of China (XJEDU2004158)
文摘In this paper, the hereditarily almost expandability of inverse limits is investigated, with two results obtained. Let X be the inverse limit space of an inverse system （Xα, π^αβ, ∧}. （1） Suppose X is hereditarily κ-metacompact, if each Xα is hereditarily pointwise collectionwise normal （almost θ-expandable, almost discrete θ-expandable）, then so is X; （2） Suppose X is hereditarily κ-σ-metacompact, if each Xα is hereditarily almost σ-expandable （almost discrete σ-expandable = σ-pointwise collectionwise normal）, then so is X.
基金The NNSF (10471025) of China the Foundation (JA04170) of the Education Department of Fujian Province, China.
文摘In this paper we first discuss the relations between some G-M-type spaces, and the previous eight kinds of G-M-type Banach spaces are merged into four different kinds. Then we build a Generalized Operator Extension Theorem, and introduce the concept of complete minimal sequences. Some sufficient and necessary conditions under which a Banach space is a hereditarily indecomposable space are given. Finally, we give some characterizations of hereditarily indecomposable Banach Spaces.
文摘设P表示可膨胀、σ-可膨胀、离散可膨胀、σ-离散可膨胀这四种性质之一.本文主要证明:(1)设X=lim{Xα,παβ,∧}并且每个投射πα是开满映射,如果X是|∧|-仿紧(遗传|∧|-仿紧)的,并且每个Xα都具有性质P(遗传性质P),则X具有性质P(遗传性质P);(2)如果X=multiply from σ∈∑ Xσ是|∑|-仿紧(遗传|∑|-仿紧)空间,则具有性质P(遗传性质p)当且仅当(?)F∈[∑]<ω,multiply from σ∈∑ Xσ具有性质P(遗传性质P).
