Class E变换器结构简单,变换效率高,有良好的发展前景。论文将磁集成技术应用到隔离型Class E变换器中,减小磁性元件的体积、重量、提高变换器的功率密度。文中详细分析了利用变压器漏感以及采用独立绕组两种磁集成方案,在此基础上,制...Class E变换器结构简单,变换效率高,有良好的发展前景。论文将磁集成技术应用到隔离型Class E变换器中,减小磁性元件的体积、重量、提高变换器的功率密度。文中详细分析了利用变压器漏感以及采用独立绕组两种磁集成方案,在此基础上,制作了输入12V、输出功率21W、输出电流0.43A的原理样机,通过实验验证了磁集成方案的有效性,从实验结果可以得出采用磁集成技术后,变换器中磁件的体积和重量明显降低,且变换器的效率有所提高。展开更多
Consistent with previous research, results showed men get more paragraphs and photography coverage. Interestingly, women's factual information is always associated with relevant men report, including P.E relevant ...Consistent with previous research, results showed men get more paragraphs and photography coverage. Interestingly, women's factual information is always associated with relevant men report, including P.E relevant with personal information.展开更多
The regional policy in the innovation development of private P.E economy plays better role in management according to law,guidance and escort;increase the macro quality of main body of private P.E entrepreneurs and th...The regional policy in the innovation development of private P.E economy plays better role in management according to law,guidance and escort;increase the macro quality of main body of private P.E entrepreneurs and the overall staff quality,develop P.E vocational P.E to provide P.E talents for private P.E economy.展开更多
The portal is characterized with large amount of information, high stability and interaction, while "Online Journal of Physical P.E" is to publicize the academic pure value, spread the achievement influence ...The portal is characterized with large amount of information, high stability and interaction, while "Online Journal of Physical P.E" is to publicize the academic pure value, spread the achievement influence in daily life, and advocate an academic atmosphere of utilitarianism with a slogan of "article issued online can be published in journal with the recommendation of experts" and practical action. It is the first academic journal under network operation.展开更多
Due to e-business' s variety of customers with different navigational patterns and demands, multiclass queuing network is a natural performance model for it. The open multi-class queuing network(QN) models are bas...Due to e-business' s variety of customers with different navigational patterns and demands, multiclass queuing network is a natural performance model for it. The open multi-class queuing network(QN) models are based on the assumption that no service center is saturated as a result of the combined loads of all the classes. Several formulas are used to calculate performance measures, including throughput, residence time, queue length, response time and the average number of requests. The solution technique of closed multi-class QN models is an approximate mean value analysis algorithm (MVA) based on three key equations, because the exact algorithm needs huge time and space requirement. As mixed multi-class QN models, include some open and some closed classes, the open classes should be eliminated to create a closed multi-class QN so that the closed model algorithm can be applied. Some corresponding examples are given to show how to apply the algorithms mentioned in this article. These examples indicate that multi-class QN is a reasonably accurate model of e-business and can be solved efficiently.展开更多
In this paper,we construct a function u in L2,1（Bn,dA）,which is unbounded on any neighborhood of each boundary point of B n,such that Toeplitz operator Tu is compact on Dirichlet space D（Bn,dA）.Furthermore,Schatte...In this paper,we construct a function u in L2,1（Bn,dA）,which is unbounded on any neighborhood of each boundary point of B n,such that Toeplitz operator Tu is compact on Dirichlet space D（Bn,dA）.Furthermore,Schatten p-class（0〈p〈∞） Toeplitz operators on Dirichlet space D（Bn,dA） with unbounded symbols are also obtained.展开更多
Theoretical foundations of a new algorithm for determining the p-capitulation type ù(K) of a number field K with p-class rank ?=2 are presented. Since ù(K) alone is insufficient for identifying the seco...Theoretical foundations of a new algorithm for determining the p-capitulation type ù(K) of a number field K with p-class rank ?=2 are presented. Since ù(K) alone is insufficient for identifying the second p-class group G=Gal(F<sub>p</sub><sup>2</sup>K∣K) of K, complementary techniques are deve- loped for finding the nilpotency class and coclass of . An implementation of the complete algorithm in the computational algebra system Magma is employed for calculating the Artin pattern AP(K)=(τ (K),ù(K)) of all 34631 real quadratic fields K=Q(√d) with discriminants 0d<10<sup>8</sup> and 3-class group of type (3, 3). The results admit extensive statistics of the second 3-class groups G=Gal(F<sub>3</sub><sup>2</sup>K∣K) and the 3-class field tower groups G=Gal(F<sub>3</sub><sup>∞</sup>K∣K).展开更多
C.P.E巴赫(Carl Philipp Emanuel Bach,1714~1788)上承巴洛克时代下启古典主义风格,无论在古钢琴奏鸣曲还是交响曲等体裁的创作上,都无疑是位举足轻重的人物。他作为柏林歌曲乐派的代表人物,一生创作了近300首德文歌曲,奠定了18世纪德...C.P.E巴赫(Carl Philipp Emanuel Bach,1714~1788)上承巴洛克时代下启古典主义风格,无论在古钢琴奏鸣曲还是交响曲等体裁的创作上,都无疑是位举足轻重的人物。他作为柏林歌曲乐派的代表人物,一生创作了近300首德文歌曲,奠定了18世纪德文歌曲写作手法,并推动了19世纪艺术歌曲的发展。以其一生的三部大型歌曲集为叙述重点,论述其德文歌曲创作的几个阶段,分析其歌曲特点,进而阐释与探析18世纪德文歌曲的写作风格。展开更多
We introduce a new family of classes of operators termed as *p-paranormal operator, classes *A(p,p);p > 0 and *A(p,q);p, q > 0, parallel to p-paranormal operator and classes A(p,p);p> 0 and A(p,q);p, q > 0...We introduce a new family of classes of operators termed as *p-paranormal operator, classes *A(p,p);p > 0 and *A(p,q);p, q > 0, parallel to p-paranormal operator and classes A(p,p);p> 0 and A(p,q);p, q > 0 introduced by M. Fujii, D. Jung, S. H. Lee, M. Y. Lee and R. Nakamoto [1]. We present a necessary and sufficient condition for p-hyponormal operator T∈B(H)to be *p-paranormal and the monotonicity of *A(p,q). We also present an alternative proof of a result of M. Fujii, et al. [1, Theorem 3.4].展开更多
Let F be a number field and p be a prime. In the successive approximation theorem, we prove that, for each integer n ≥ 1, finitely many candidates for the Galois group of the nth stage of the p-class tower over F are...Let F be a number field and p be a prime. In the successive approximation theorem, we prove that, for each integer n ≥ 1, finitely many candidates for the Galois group of the nth stage of the p-class tower over F are determined by abelian type invariants of p-class groups C1pE of unramified extensions E/F with degree [E : F] = pn-1. Illustrated by the most extensive numerical results available currently, the transfer kernels (TE, F) of the p-class extensions TE, F : C1pF → C1pE from F to unramified cyclic degree-p extensions E/F are shown to be capable of narrowing down the number of contestants significantly. By determining the isomorphism type of the maximal subgroups S G of all 3-groups G with coclass cc(G) = 1, and establishing a general theorem on the connection between the p-class towers of a number field F and of an unramified abelian p-extension E/F, we are able to provide a theoretical proof of the realization of certain 3-groups S with maximal class by 3-tower groups of dihedral fields E with degree 6, which could not be realized up to now.展开更多
文摘Consistent with previous research, results showed men get more paragraphs and photography coverage. Interestingly, women's factual information is always associated with relevant men report, including P.E relevant with personal information.
文摘The regional policy in the innovation development of private P.E economy plays better role in management according to law,guidance and escort;increase the macro quality of main body of private P.E entrepreneurs and the overall staff quality,develop P.E vocational P.E to provide P.E talents for private P.E economy.
文摘The portal is characterized with large amount of information, high stability and interaction, while "Online Journal of Physical P.E" is to publicize the academic pure value, spread the achievement influence in daily life, and advocate an academic atmosphere of utilitarianism with a slogan of "article issued online can be published in journal with the recommendation of experts" and practical action. It is the first academic journal under network operation.
文摘Due to e-business' s variety of customers with different navigational patterns and demands, multiclass queuing network is a natural performance model for it. The open multi-class queuing network(QN) models are based on the assumption that no service center is saturated as a result of the combined loads of all the classes. Several formulas are used to calculate performance measures, including throughput, residence time, queue length, response time and the average number of requests. The solution technique of closed multi-class QN models is an approximate mean value analysis algorithm (MVA) based on three key equations, because the exact algorithm needs huge time and space requirement. As mixed multi-class QN models, include some open and some closed classes, the open classes should be eliminated to create a closed multi-class QN so that the closed model algorithm can be applied. Some corresponding examples are given to show how to apply the algorithms mentioned in this article. These examples indicate that multi-class QN is a reasonably accurate model of e-business and can be solved efficiently.
文摘In this paper,we construct a function u in L2,1（Bn,dA）,which is unbounded on any neighborhood of each boundary point of B n,such that Toeplitz operator Tu is compact on Dirichlet space D（Bn,dA）.Furthermore,Schatten p-class（0〈p〈∞） Toeplitz operators on Dirichlet space D（Bn,dA） with unbounded symbols are also obtained.
文摘Theoretical foundations of a new algorithm for determining the p-capitulation type ù(K) of a number field K with p-class rank ?=2 are presented. Since ù(K) alone is insufficient for identifying the second p-class group G=Gal(F<sub>p</sub><sup>2</sup>K∣K) of K, complementary techniques are deve- loped for finding the nilpotency class and coclass of . An implementation of the complete algorithm in the computational algebra system Magma is employed for calculating the Artin pattern AP(K)=(τ (K),ù(K)) of all 34631 real quadratic fields K=Q(√d) with discriminants 0d<10<sup>8</sup> and 3-class group of type (3, 3). The results admit extensive statistics of the second 3-class groups G=Gal(F<sub>3</sub><sup>2</sup>K∣K) and the 3-class field tower groups G=Gal(F<sub>3</sub><sup>∞</sup>K∣K).
文摘C.P.E巴赫(Carl Philipp Emanuel Bach,1714~1788)上承巴洛克时代下启古典主义风格,无论在古钢琴奏鸣曲还是交响曲等体裁的创作上,都无疑是位举足轻重的人物。他作为柏林歌曲乐派的代表人物,一生创作了近300首德文歌曲,奠定了18世纪德文歌曲写作手法,并推动了19世纪艺术歌曲的发展。以其一生的三部大型歌曲集为叙述重点,论述其德文歌曲创作的几个阶段,分析其歌曲特点,进而阐释与探析18世纪德文歌曲的写作风格。
文摘We introduce a new family of classes of operators termed as *p-paranormal operator, classes *A(p,p);p > 0 and *A(p,q);p, q > 0, parallel to p-paranormal operator and classes A(p,p);p> 0 and A(p,q);p, q > 0 introduced by M. Fujii, D. Jung, S. H. Lee, M. Y. Lee and R. Nakamoto [1]. We present a necessary and sufficient condition for p-hyponormal operator T∈B(H)to be *p-paranormal and the monotonicity of *A(p,q). We also present an alternative proof of a result of M. Fujii, et al. [1, Theorem 3.4].
文摘Let F be a number field and p be a prime. In the successive approximation theorem, we prove that, for each integer n ≥ 1, finitely many candidates for the Galois group of the nth stage of the p-class tower over F are determined by abelian type invariants of p-class groups C1pE of unramified extensions E/F with degree [E : F] = pn-1. Illustrated by the most extensive numerical results available currently, the transfer kernels (TE, F) of the p-class extensions TE, F : C1pF → C1pE from F to unramified cyclic degree-p extensions E/F are shown to be capable of narrowing down the number of contestants significantly. By determining the isomorphism type of the maximal subgroups S G of all 3-groups G with coclass cc(G) = 1, and establishing a general theorem on the connection between the p-class towers of a number field F and of an unramified abelian p-extension E/F, we are able to provide a theoretical proof of the realization of certain 3-groups S with maximal class by 3-tower groups of dihedral fields E with degree 6, which could not be realized up to now.
