In this present paper, we introduce and investigate a new form of mappings namely;upper and lower M-asymmetric preirresolute multifunctions defined between M-structural asymmetric topological spaces. The relationships...In this present paper, we introduce and investigate a new form of mappings namely;upper and lower M-asymmetric preirresolute multifunctions defined between M-structural asymmetric topological spaces. The relationships between the multifunctions in our sense and other types of precountinuous and preirresolute multifunctions defined on both symmetric and asymmetric topological structures are discussed.展开更多
广义M-C强度准则在考虑到中间主应力的影响,基于热力学第一定律被提出。为验证该强度准则可行性,以FLAC^(3D)为模拟软件,visual studio 2010作为编译器,自定义本构模型广义M-C强度准则。在FLAC^(3D)中以一个简单模拟三轴试验对比分析广...广义M-C强度准则在考虑到中间主应力的影响,基于热力学第一定律被提出。为验证该强度准则可行性,以FLAC^(3D)为模拟软件,visual studio 2010作为编译器,自定义本构模型广义M-C强度准则。在FLAC^(3D)中以一个简单模拟三轴试验对比分析广义M-C强度准则和M-C强度准则计算结果。FLAC^(3D)模拟中广义M-C强度准则计算结果略大于M-C强度准则计算结果,符合M-C强度和广义M-C强度理论公式计算结果。广义M-C强度准则成功嵌入FLAC^(3D)中,且广义M-C强度准则可应用于岩土工程相关研究和计算。展开更多
We have used an ab initio self-consistent field(SCF) molecular orbital approach toinvestigate the equilibrium geometry and relative stability of C4S4m- (m=0,1,2,3,4). We foundthat the geometry of anions studied from m...We have used an ab initio self-consistent field(SCF) molecular orbital approach toinvestigate the equilibrium geometry and relative stability of C4S4m- (m=0,1,2,3,4). We foundthat the geometry of anions studied from m=0 to m=4 changes from non-aromatic structure toaromatic structure and fmally anti-aromatic structure and that the relative stability decreases inthe order of: C4S4m- > C4S42- > C4S4 > C4S4 > C4S4.展开更多
The microwave-absorbing behavior o f substituted M-type barium ferrite nano-particles was investigated.T he nano-particles were synthesized wi th coprecipitation-melted salt method.For the purpose of comparison,c orre...The microwave-absorbing behavior o f substituted M-type barium ferrite nano-particles was investigated.T he nano-particles were synthesized wi th coprecipitation-melted salt method.For the purpose of comparison,c orre-sponding micro-particles were also prepared through direct coprecipitation and sintering.XRD and TEM of th e nano-particles showed that the ferr ite was hexagonal in structure and wi dely distributed in size with partic le size being less than 100nm,the complex permittivity and permeability of a 1.50mm thick specimen and a 1.40mm thick specimen containing 60%by weight of substituted M-type barium ferrite n ano-particles and micro-particles were measured respectively in X band(8.2～12.4GHz )range,from which the reflection loss(R.L.)of microwaves was calculated and two comparative abso rption curves were given.The results showed that the synthetic nano-particles could well absorb microwaves in X ban d.The absorption was larger than 10dB in the range of 9.2～12.4GHz while the maximum absorption was 38.6dB at10.6GHz.展开更多
文摘In this present paper, we introduce and investigate a new form of mappings namely;upper and lower M-asymmetric preirresolute multifunctions defined between M-structural asymmetric topological spaces. The relationships between the multifunctions in our sense and other types of precountinuous and preirresolute multifunctions defined on both symmetric and asymmetric topological structures are discussed.
文摘广义M-C强度准则在考虑到中间主应力的影响,基于热力学第一定律被提出。为验证该强度准则可行性,以FLAC^(3D)为模拟软件,visual studio 2010作为编译器,自定义本构模型广义M-C强度准则。在FLAC^(3D)中以一个简单模拟三轴试验对比分析广义M-C强度准则和M-C强度准则计算结果。FLAC^(3D)模拟中广义M-C强度准则计算结果略大于M-C强度准则计算结果,符合M-C强度和广义M-C强度理论公式计算结果。广义M-C强度准则成功嵌入FLAC^(3D)中,且广义M-C强度准则可应用于岩土工程相关研究和计算。
文摘We have used an ab initio self-consistent field(SCF) molecular orbital approach toinvestigate the equilibrium geometry and relative stability of C4S4m- (m=0,1,2,3,4). We foundthat the geometry of anions studied from m=0 to m=4 changes from non-aromatic structure toaromatic structure and fmally anti-aromatic structure and that the relative stability decreases inthe order of: C4S4m- > C4S42- > C4S4 > C4S4 > C4S4.
文摘The microwave-absorbing behavior o f substituted M-type barium ferrite nano-particles was investigated.T he nano-particles were synthesized wi th coprecipitation-melted salt method.For the purpose of comparison,c orre-sponding micro-particles were also prepared through direct coprecipitation and sintering.XRD and TEM of th e nano-particles showed that the ferr ite was hexagonal in structure and wi dely distributed in size with partic le size being less than 100nm,the complex permittivity and permeability of a 1.50mm thick specimen and a 1.40mm thick specimen containing 60%by weight of substituted M-type barium ferrite n ano-particles and micro-particles were measured respectively in X band(8.2～12.4GHz )range,from which the reflection loss(R.L.)of microwaves was calculated and two comparative abso rption curves were given.The results showed that the synthetic nano-particles could well absorb microwaves in X ban d.The absorption was larger than 10dB in the range of 9.2～12.4GHz while the maximum absorption was 38.6dB at10.6GHz.
