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1.
介绍了ω-3系列脂肪酸在乳中的种类、含量、功能,并讨论了提高乳中ω-3系列脂肪酸含量的几种方法  相似文献   

2.
L-fuzzy保序算子空间中的ω-Lindeloeff可数性质   总被引:1,自引:0,他引:1  
在L-fuzzy保序算子空间上引入ω-Lindeloeff可数性和弱ω-Lindeloeff可数性等概念,并系统地研究了它们的基本性质以及它们与第二ω-可数空间之间的关系.证明了ω-Lindeloeff性质和弱ω-Lindeloeff性质是ω-闭遗传的,而且在(ω1- ,ω2-)-同胚映射下,ω-Lindeloeff可数性是不变性质。  相似文献   

3.
给出了lω1ω的一个子逻辑系统l'ω1ω,并在其上初步讨论了一些重要的模型论性质,给出了l'ω1ω的一个特征。主要结果是:如果l是一强于l'ω1ω的可有限分离的正规逻辑系统,且在l上LST定理和ω1-紧致性定理成立,则l与l'ω1ω等价。  相似文献   

4.
主要解决了形如等函数的周期性问题(其中F(ωix)表示6个三角函数sinωix,cosωix,tgωix,ctgωix,secωix,cscωix之一,ω1,ω2,…,ωn表示n个互不相等的正数,mi(1≤i≤n)均为正有理数,ai(1≤i≤n)均为正数).  相似文献   

5.
L-fuzzy保序算子空间上的Moore-Smith收敛理论   总被引:23,自引:3,他引:23  
在L-fuzzy保序算子空间上引入分子网和理想的ω-极限点和ω-聚点等概念,系统地讨论这些概念的基本性质以及它们之间的关系。同时,利用分子网和理想的ω-收敛性概念,给出ω-闭集以及序同态的(ω1,ω2)-连续性的若干特征定理。较为完整地建立L-fuzzy保序算子空间上的Moore-Smith收敛理论。  相似文献   

6.
诱导算子与UMT整环   总被引:3,自引:14,他引:3  
设R包含于T是整环扩张,定义了T上的由R的ω-算子所诱导的星型算子ωR,并给出了ωR-乘法整环的特征.也讨论了环的ω-整相关理论与环的ω-整闭包,证明了在ω-整扩张下,环R的ω-维数与环T的ωR-维数的一致性.还证明了一个整环R是UMT整环当且仅当R的ω-整闭包R^ω是ωR-乘法整环.  相似文献   

7.
提出了一种新的语言──$-ω-语言,把语言、ω-语言和$-ω语言统一地讨论.特别对$-ω正规语言进行了详细地讨论,得到了$-ω正规语言的代数结构定理.提出了抽象正规表达式,得到了用同一个抽象正规表达式α表示正规语言V和ω-正规语言Vω的方法.  相似文献   

8.
本文研究了自然数分拆的内在结构,主要讨论了序((ω),≤)和((ω),)的可分裂性,以及格((ω),≤)和((ω),)的可分配性,最后证明一个结论.  相似文献   

9.
多层喷射沉积技术中的轨迹分析   总被引:1,自引:1,他引:0  
提出了多层喷射沉积在板坯和管坯方面雾化液滴沉积到接收器表面的轨迹方程,分析了各工艺参数对轨迹的影响.结果表明,各参数中ωy/ωx对轨迹分布的均匀性影响最大.当ωy与ωx之比成整数时,多层喷射沉积工艺的第二层就开始沿着第一层轨迹线重喷;但随着ωy/ωx值越大,单层轨迹越复杂;ωy/ωx值偏离倍数关系时,多层喷射沉积轨迹分布趋向均匀.  相似文献   

10.
在许多学者得到的重要结果的基础上,文章利用Fourier—Laplace变换对BeurLing型ω-超可微函数空间D{ω}和Rumieu型ω-型可微函数D{ω}进行了讨论,并且给出了Dω中的Paley-Wiener定理.  相似文献   

11.
Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.  相似文献   

12.
何延凌 《科技信息》2008,(4):258-258
Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women's language from these perspectives: pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women's language, more attention should be paid to language use in social context. What's more, the linguistic phenomena in a speaking community can be understood more thoroughly.  相似文献   

13.
王慧 《科技信息》2008,(10):240-240
Wuthering Heights, Emily Bronte's only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.  相似文献   

14.
The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.  相似文献   

15.
理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。  相似文献   

16.
As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.  相似文献   

17.
Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.  相似文献   

18.
正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-  相似文献   

19.
We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-  相似文献   

20.
正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that  相似文献   

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