在众多P2P资源搜索技术中,基于语义相关的搜索被重点关注。本文在基于语义分组的P2P网络拓扑下,提出了一种新颖高效的搜索方式SKIP(search with K-Iteration preference),即K-层迭代优先选择算法。查询定位到目标节点后,SKIP系统使用K-...在众多P2P资源搜索技术中,基于语义相关的搜索被重点关注。本文在基于语义分组的P2P网络拓扑下,提出了一种新颖高效的搜索方式SKIP(search with K-Iteration preference),即K-层迭代优先选择算法。查询定位到目标节点后,SKIP系统使用K-层迭代优先选择算法进行搜索。实验表明,SKIP算法具有高效的搜索效率和较低的搜索开销,与现有的基于语义的搜索策略相比,具有更高的查准率和更低的查询开销。展开更多
In this paper, we discuss the relationship between k-semi-stratifiable spaces and quais-Nagata spaces and some mapping properties of quasi-Nagata spaces. We get following results: sequence-covering closed mapping pres...In this paper, we discuss the relationship between k-semi-stratifiable spaces and quais-Nagata spaces and some mapping properties of quasi-Nagata spaces. We get following results: sequence-covering closed mapping preserve quasi-Nagata spaces, and finite-to-one open mappings don't preserve quasi-Nagata spaces.展开更多
The energy spectra of reflected electrons from the substrates of targets have been calculated by the bipartition model of electron transport, the contributions of the inner shen ionization events produced by the refle...The energy spectra of reflected electrons from the substrates of targets have been calculated by the bipartition model of electron transport, the contributions of the inner shen ionization events produced by the reflected electrons from the substrates in the targets to the x-ray counting in a St(Li) detector have been estimated. It has been confirmed that, by such correction to the measured data, the experimental results of inner shell ionization cross sections by electron impact with fine precision may be obtained under the condition of thick substrate.展开更多
Cross sections for K-shell ionization have been measured at electron energies of 0.1-0.40 MeV for Cu and Sn, and of 0.30MeV for Ag. The present results have been compared with theoretical calculations and previously r...Cross sections for K-shell ionization have been measured at electron energies of 0.1-0.40 MeV for Cu and Sn, and of 0.30MeV for Ag. The present results have been compared with theoretical calculations and previously reported experimental values.展开更多
Two kinds of higher-dimensional Lie algebras and their loop algebras are introduced, for which a few expanding integrable models including the coupling integrable couplings of the Broer-Kaup （BK） hierarchy and the d...Two kinds of higher-dimensional Lie algebras and their loop algebras are introduced, for which a few expanding integrable models including the coupling integrable couplings of the Broer-Kaup （BK） hierarchy and the dispersive long wave （DLW） hierarchy as well as the TB hierarchy are obtained. From the reductions of the coupling integrable couplings, the corresponding coupled integrable couplings of the BK equation, the DLW equation, and the TB equation are obtained, respectively. Especiaily, the coupling integrable coupling of the TB equation reduces to a few integrable couplings of the well-known mKdV equation. The Hamiltonian structures of the coupling integrable couplings of the three kinds of soliton hierarchies are worked out, respectively, by employing the variationai identity. Finally, we decompose the BK hierarchy of evolution equations into x-constrained flows and tn-eonstrained flows whose adjoint representations and the Lax pairs are given.展开更多
The oriented lamellar K-rich exsolutions within clinopyroxene host were recognized in garnet peridotite mas-sif at Zhimafang in the Sulu ultrahigh pressure metamorphic terrane, eastern China. EMP and TEM analyses reve...The oriented lamellar K-rich exsolutions within clinopyroxene host were recognized in garnet peridotite mas-sif at Zhimafang in the Sulu ultrahigh pressure metamorphic terrane, eastern China. EMP and TEM analyses revealedthat the composition and the index of electron diffraction for this exsolution are corresponding with phlogopite, and theshape is the lamellae with 1 mm in width and 5 to 30 mm inlength. Moreover, the topotaxy is that the (001) of K-rich exsolution parallels to (100) of the clinopyroxene host. Theelectron diffraction analyzing shows the exsolution is of a 1M polymorphism. The high-resolution lattice fringe image dis-plays the stack features along [001], which only a layer min-eral shows. We conclude that the clinopyroxene with 1M and K-rich exsolution was probably derived from mantle depthsover 240 km, thus resulting from decompressional exsolution in the initial stage of slab exhumation.展开更多
基金supported by NSFC(10971092)Foundation of Anhui Educational Committee for Exellent College Young Scholars(2010SQRL041)Youth Foundation of Anhui University of Technology (QZ200917)
文摘在众多P2P资源搜索技术中,基于语义相关的搜索被重点关注。本文在基于语义分组的P2P网络拓扑下,提出了一种新颖高效的搜索方式SKIP(search with K-Iteration preference),即K-层迭代优先选择算法。查询定位到目标节点后,SKIP系统使用K-层迭代优先选择算法进行搜索。实验表明,SKIP算法具有高效的搜索效率和较低的搜索开销,与现有的基于语义的搜索策略相比,具有更高的查准率和更低的查询开销。
文摘In this paper, we discuss the relationship between k-semi-stratifiable spaces and quais-Nagata spaces and some mapping properties of quasi-Nagata spaces. We get following results: sequence-covering closed mapping preserve quasi-Nagata spaces, and finite-to-one open mappings don't preserve quasi-Nagata spaces.
文摘The energy spectra of reflected electrons from the substrates of targets have been calculated by the bipartition model of electron transport, the contributions of the inner shen ionization events produced by the reflected electrons from the substrates in the targets to the x-ray counting in a St(Li) detector have been estimated. It has been confirmed that, by such correction to the measured data, the experimental results of inner shell ionization cross sections by electron impact with fine precision may be obtained under the condition of thick substrate.
文摘Cross sections for K-shell ionization have been measured at electron energies of 0.1-0.40 MeV for Cu and Sn, and of 0.30MeV for Ag. The present results have been compared with theoretical calculations and previously reported experimental values.
基金Supported by the National Science Foundation of China under Grant No.10971031the Natural Science Foundation of Shandong Province under Grant No.ZR2009AL021
文摘Two kinds of higher-dimensional Lie algebras and their loop algebras are introduced, for which a few expanding integrable models including the coupling integrable couplings of the Broer-Kaup （BK） hierarchy and the dispersive long wave （DLW） hierarchy as well as the TB hierarchy are obtained. From the reductions of the coupling integrable couplings, the corresponding coupled integrable couplings of the BK equation, the DLW equation, and the TB equation are obtained, respectively. Especiaily, the coupling integrable coupling of the TB equation reduces to a few integrable couplings of the well-known mKdV equation. The Hamiltonian structures of the coupling integrable couplings of the three kinds of soliton hierarchies are worked out, respectively, by employing the variationai identity. Finally, we decompose the BK hierarchy of evolution equations into x-constrained flows and tn-eonstrained flows whose adjoint representations and the Lax pairs are given.
基金Supported by the Natural Science Foundation of China(No.10971125)the Project of Department of Education of Guangdong Province(No.2012KJCX0101)the Science Foumdation for Young Teachers of Wuyi University(No.2013zk03)
文摘The oriented lamellar K-rich exsolutions within clinopyroxene host were recognized in garnet peridotite mas-sif at Zhimafang in the Sulu ultrahigh pressure metamorphic terrane, eastern China. EMP and TEM analyses revealedthat the composition and the index of electron diffraction for this exsolution are corresponding with phlogopite, and theshape is the lamellae with 1 mm in width and 5 to 30 mm inlength. Moreover, the topotaxy is that the (001) of K-rich exsolution parallels to (100) of the clinopyroxene host. Theelectron diffraction analyzing shows the exsolution is of a 1M polymorphism. The high-resolution lattice fringe image dis-plays the stack features along [001], which only a layer min-eral shows. We conclude that the clinopyroxene with 1M and K-rich exsolution was probably derived from mantle depthsover 240 km, thus resulting from decompressional exsolution in the initial stage of slab exhumation.
