全文获取类型
收费全文 | 104篇 |
免费 | 4篇 |
国内免费 | 3篇 |
专业分类
数学 | 80篇 |
物理学 | 8篇 |
无线电 | 23篇 |
出版年
2023年 | 1篇 |
2022年 | 1篇 |
2020年 | 2篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 2篇 |
2015年 | 3篇 |
2014年 | 5篇 |
2013年 | 30篇 |
2012年 | 4篇 |
2011年 | 6篇 |
2010年 | 10篇 |
2009年 | 4篇 |
2008年 | 7篇 |
2007年 | 3篇 |
2006年 | 7篇 |
2005年 | 6篇 |
2004年 | 1篇 |
2003年 | 3篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 2篇 |
1992年 | 1篇 |
1991年 | 1篇 |
排序方式: 共有111条查询结果,搜索用时 312 毫秒
101.
The notion of a Poincaré–Birkhoff–Witt (PBW)-pair of varieties of linear algebras over a field is under consideration. Examples of PBW-pairs are given. We prove that if (𝒱, 𝒲) is a PBW-pair and the variety 𝒱 is homogeneous and Schreier, then so is 𝒲; the results similar to the Schreier property for PBW-pairs are also true for the Freiheitssatz and Word problem. In particular, it follows that the Freiheitssatz is true for the varieties of Akivis and Sabinin algebras. We give also examples of varieties that do not satisfy the Freiheitssatz. It is shown that an element u of a free algebra 𝒲[X] in a homogeneous Schreier variety of algebras 𝒲 satisfying the Freiheitssatz is a primitive element (a coordinate polynomial) if and only if the factor algebra of 𝒲[X] by the ideal generated by the element u is a free algebra in 𝒲. We consider also properties of primitive elements. 相似文献
102.
Majid M. Ali 《代数通讯》2013,41(9):2767-2792
In our recent work we investigated Anderson's theorems and gave a treatment of certain aspects of multiplication modules and cancellation-like modules via idealization. The purpose of this work is to continue our study and develop the tool of idealization of modules, particularly in the context of flat modules. 相似文献
103.
104.
105.
Stevo Stevi? 《Applied mathematics and computation》2010,217(6):2870-2876
Let D be a bounded symmetric domain. We calculate operator norm of the multiplication operator on the Hardy space Hp(D), as well as of the weighted composition operator from Hp(D) to a weighted-type space. 相似文献
106.
Hardy-Orlicz Spaces and Their Multiplication Operators 总被引:2,自引:0,他引:2
Qun LU Guang Fu CAO Li Fang LIU 《数学学报(英文版)》2005,21(3):593-598
In this paper some formulae on the relationship between Hardy and Hardy Orlicz spaces are presented, and multiplication operators on Hardy-Orlicz spaces are discussed. 相似文献
107.
本文提出一种图像处理用的数字乘法器电路方案,叙述了用PBOM进行乘法运算的原理,并提出了具体实施方案。 相似文献
108.
In this paper, we introduce the definitions of the possibilistic mean, variance and covariance of multiplication of fuzzy numbers, and show some properties of these definitions. Then, we apply these definitions to build the possibilistic models of portfolio selection under the situations involving uncertainty over the time horizon, by considering the portfolio selection problem from the point of view of possibilistic analysis. Moreover, numerical experiments with real market data indicate that our approach results in better portfolio performance. 相似文献
109.
Higinio Mora-Mora Author Vitae Jerónimo Mora-Pascual Author Vitae Author Vitae Juan Manuel García-Chamizo Author Vitae 《Integration, the VLSI Journal》2008,41(4):557-571
In this paper we present a new technique for partial product reduction in multiplication operations. The method is based on the construction of counter elements by means of look-up tables. The organization of these counters into reduction trees takes advantage of the inherent benefits of the integration of the memories and provides an alternative to classic operation methods. We show several reduction schemes that illustrate the proposed technique and describe hybrid examples that combine stored logic with classic combinational counters in order to adapt them better to each scheme. Our approach outperforms other schemes used for comparison. In this sense, not only an independent technology model has been established, but also an FPGA approximation has been implemented to measure such factors in a real-life technology platform. 相似文献
110.
In this study, we give multiplication formula for generalized Euler polynomials of order α and obtain some explicit recursive formulas. The multiple alternating sums with positive real parameters a and b are evaluated in terms of both generalized Euler and generalized Bernoulli polynomials of order α. Finally we obtained some interesting special cases. 相似文献