用球面多项式最佳逼近阶刻画Besov空间

设Ｅｎ（ｆ）ｐ表示ｆ∷Ｌ＾ｐ的ｎ次最佳逼近,Ｅｎ（ｆ）ｐ＝ｄｉｓｔ（ｆ;ｎ,Ｌ＾ｐ）－ｉｎｆ＾ｈｎ∈ｎ｜｜ｆ－ｈｎ｜｜ｐ,Ｄ＾ｐ．ｒ表示序列型子空间,则在球面函数的Ｈｏｌｄｅｒ范数下,Ｄ＾ｐ．ｒ为Ｂａｎａｃｈ空间,且有结论：若ｆ∈Ｌ＾ｐ（１≤ｐ〈∞）以及ｒ,ｎ∈Ｎ,则有Ｅｎ（ｆ）≤ｃｏｎｓｔＫ．（ｆ,ｎ＾－ｒ,Ｌ＾ｐ,Ｄ＾ｐ．ｒ）。又用球面函数的Ｈｏｌｄｅｒ范数,定义了一类Ｂｅｓｏｖ空间,用球面最     

方程X~（n）（t）＋P（t）f（h（t）））g（X~（n－1）（t））＝0的振动性

讨论方程ｘ（ｎ）（ｔ）＋ｐ（ｔ）ｆ（ｘ（ｈ（ｔ）））ｇ（ｘ（ｎ－１）（ｔ））＝０的振动性，其中ｎ为偶数．得出方程振动的充分条件．推广和改进了ＳＫＧｒａｃｅ，ＢＳＬａｌｌｉ和ＳＵｒｓｚｕｌａ的结果．     

有返回轨道的区间连续自映射

设ｆ∈Ｃ０（Ｉ），若存在ｘ∈Ｉ及正整数ｎ，正奇数ｄ及非负偶数ｐ使得ｆｎ（Ｘ）≤Ｘ＜ｆ（ｘ）且ｆｄ（ｘ）≤ｆｐ（ｘ），或者ｆｎ（ｘ）≥ｘ＞ｆ（ｘ）且ｆｄ（ｘ）≥ｆｐ（ｘ），则ｆ２含有湍流，即，存在着Ｉ中的点ｒ＜ｓ＜ｔ使得ｆ２（［ｒ，ｓ］）（［ｓ，ｔ］［ｒ，ｔ］）。这一结论改进了ＴＹＬｉ，ＭＭｉｓｉｕｒｅｗｉｃｚ等人在“Ｎｏｄｉｖｉｓｉｏｎｉｍｐｌｉｅｓｃｈａｏｓ”中的命题３．６．此外，本文还简化了该文中的命题２．３及３．４的证明。     

利用Jourdain原理研究二阶非完整系统的守恒律

目的研究具有二阶非完整约束的力学系统守恒律．方法利用Ｊｏｕｒｄａｉｎ变分原理∑Ｎｉ＝１（Ｆｉ－ｍｉｒ¨ｉ）·δ１ｒ．ｉ＝０,引入Ｊｏｕｒｄａｉｎ生成元（Δ１ｑｓ）．＝εＦｓ（ｔ,ｑ,ｑ．）,（Δ１ｔ）．＝εｆ（ｔ,ｑ,ｑ．）和推广的Четаев定义∑ｎｓ＝１φβｑ¨ｓδ１ｑ．ｓ＝０,得到无限小变换下列的不变性条件．结果当无限小生成元ｆ,Ｆｓ满足一定条件时可得到系统的守恒律．结论推广了完整系统和一阶非完整系统的相应结果,二阶非完整系统也存在守恒律．     

Baskakov-Durmeyer算子一致逼近的正定理

给出了ＢａｓｋａｋｏｖＤｕｒｒｍｅｙｅｒ算子及其线性组合一致逼近的正定理，利用光滑模ωｒφλ（ｆ，ｔ）（０≤λ≤１），φ（ｘ）＝ｘ（１＋ｃｘ），ｃ＞０）推广宣培才［１］导出的结果到一般形式     

拟生双曲组某定解问题整体光滑解的存在性

讨论如下问题：δｒ／δｔ＋λ１（ｒ,ｓ）δｓ／δｔ＋λ２（ｒ,ｓ）δｓ／δｘ＝０,［ｆ（ｒ,ｓ）］ｘ＝ｘ（ｔ）＝Ａ（ｔ）,［ｒ－ψ（ｓ）］ｘ＝ｘ（ｔ）＝０,其中λ１（ｒ,ｓ）与λ２（ｒ,ｓ）是已知函数,ｘ＝ｘ（ｔ）是非特征曲线,Ａ（ｔ）＝ｄｘ／ｄｔ,ｆ（ｒ,ｓ）及ψ（ｓ）是已知的可微函数。求解区域是Ｈ＝［（ｘ,ｔ）│（ｘ〉ｘ（ｔ）,Ａ↓ｔ｝。在适当的假设下,文中采用速矢端变换,证明了上述问题的整体     

混合范数空间与面积积分

研究了混合范数空间Ｈ（ｐ,ｑ,α）中解析函数ｆ的面积积分Ａｒ（ｆ）和Ａｒ（ｔ,θ,ｆ）的增长性,对ｐ的不同取值,分别用Ａｒ（ｆ）和Ａｒ（ｔ,θ,ｆ）给出了ｆ∈Ｈ（ｐ,ｑ,α）的充分条件和必要条件。对Ｄ上的面积平均ｊ叶函数族,给出了充要条件。结果推广了Ｆ．Ｈｏｌｌａｎｄ,Ｊ．Ｂ．Ｔｗｏｍｅｙ和Ｓ．Ｙａｍａｓｈｉｔａ的主要结论。     

L~2〔a，b〕上的Hilbert－Schmidt算子与L~2（〔a，b〕~2）的关系

证明了存在从Ｌ２〔ａ，ｂ〕上的全体Ｈｉｌｂｅｒｔ－Ｓｃｈｍｉｄｔ算子空间到Ｌ２（〔ａ，ｂ〕２）上的酉算子Ｕ，满足（Ｋｆ）（ｘ）＝∫ｂａ（ＵＫ）（ｘ，ｙ）ｆ（ｙ）ｄｙ，ｆ∈Ｌ２〔ａ，ｂ〕．其中Ｋ为Ｌ２〔ａ，ｂ〕上的任意Ｈｉｌｂｅｒｔ－Ｓｃｈｍｉｄｔ算子     

势型算子的双加权不等式

研究了势型算子ＴΦｆ（ｘ）＝∫Ｒｎ＾Φ（ｘ－ｙ）ｆ（ｙ）ｄｙ在ＬＶ＾ｐ（Ｒ＾ｎ）到Ｌω＾ｑ（Ｒ＾ｎ）上有界的充分条件,当１≤ｐ≤ｑ〈∞,１〈ｒ〈ｐｓ／ｐ＋ｓ－１,ｓ〉１,Φ（ｘ）是非负函数,且Φ∈Ｌｌｏｃ＾１（Ｒ＾ｎ）,Φ（ｔ）＝（∫／ｚ／≤ｔ＾Φｒ（ｚ）ｄｚ）＾１／ｒ。若对任何方体Ｑ有Φ（ｌ（Ｑ））／Ｑ／＾、／ｑ－１／ｐ＋１／ｒ（１／／ｑ／／∫Ｑ＾Ｗ＾ｑｓｄｘ）＾１／ｑｓ（１／／Ｑ／∫Ｑ＾ｖ－ｐ     

二阶常微分方程的一个振动定理

建立了二阶超线性常微分方程ｘ″（ｔ）＋ｐ（ｘ）ｘ′（ｔ）＋ｑ（ｔ）｜ｘ（ｔ）｜αｓｇｎｘ（ｔ）＝０,ｔ≥ｔ０,的一个新的振动定理,它推广且统一了文献〔１〕—〔５〕中的某些结果。     

Markedness and its Interpretation in Language Use

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.     

Lower Paleozoic oil relationships within Williston Basin, Canada

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

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.     

Design and analysis of generic LBS application developing platform

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.