极大多线性奇异积分算子的一个加权估计

考虑极大多线性奇异积分算子TA^＊f（x）=ε〉0sup｜∫｜x-y｜〉ε ｜x-y｜^n＋1/Ω（x-y）（A（x）-A（y）-△↓A（y）（x-y））f（y）dy｜的加权L^p估计,其中Ω是零次齐次函数,在单位球面S^n-1上可积且满足一阶消失矩条件,函数A的所有一阶偏微商属于空间BMO（R^n）．证明了当Ω∈Lipα（S^n-1）（0〈α≤1）时,对于任意的p∈（1,∞）,δ〉0和权函数ω,TA^＊是L^p（R^n,ML（logL）^p＋δω）到L^p（R^n,ω）的有界算子,改进了此前的有关结论．     

一类粗糙核奇异积分算子与Lipschitz函数生成的交换子的有界性估计

引入了一类粗糙核奇异积分算子与Lipschitz函数生成的交换子Tb=b(x)Tf(x) - T(bf)(x),T表示具有粗糙核Ω∈n/L(n-a) (Log(Sn-1))的奇异积分算子,b是Lipschitz函数,并研究了此交换子的LP(Rn)到L2(Rn),1/2=(1/p)-(α/n)有界性.     

粗糙核抛物型奇异积分算子及交换子在广义Morrey空间上的有界性

借助于粗糙核抛物型奇异积分算子 Tf（x）=p.v.∫R^nΩ（y）/ρ（y）^αf（x-y）dy 的L^p有界性得到了当核函数Ω满足一类Lipschitz条件时,T在广义Morrey空间上的有界性结果．作为对上述结果的应用,当Ω满足一类L^p-Dini条件,b（x）为BMO函数时,我们也证明了粗糙核抛物型奇异积分高阶交换子 [b,T]^m（f）（x）=p.v.∫R^nΩ（x-y）/ρ（x-y）^α[b（x）-b（y）]^mf（y）dy 在广义Morrey空间上是有界的．     

具有粗糙核的奇异积分算子及其交换子在加权(L~q,L~p)~α(R~n)空间上的有界性

利用Ap权性质及分析中的不等式,讨论具有粗糙核的奇异积分算子TΩ及其与BMO函数b生成的交换子b,TΩ在加权共合空间(Lωq,Lp)α(Rn)上的有界性,其中1q≤αp≤∞.     

具有粗糙变量核的振荡奇异积分

建立了具有变量核Ω(x ,y/ ｜y｜) ｜y｜-n的振荡奇异积分算子的Lp(Rn)有界性 ,其中Ω(x ,·)∈Lq(Sn- 1) ,1相似文献   

积域上带粗糙核的Marcinkiewiez积分

本文给出了如下定义的乘积空间Ｒｎ×Ｒｍ上一类带粗糙核的Ｍａｒｃｉｎｋｉｅｗｉｅｚ积分算子μΩ（ｆ）的Ｌ２（Ｒｎ×Ｒｍ）有界性：μΩ（ｆ）（ｘ，ｙ）＝（∫∞０∫∞０｜Ｆｔ，ｓ（ｘ，ｙ）｜２ｄｔｄｓｔ３ｓ３）１２，这里Ｆｔ，ｓ（ｘ，ｙ）＝｜ｘ－ｕ｜≤ｔ｜ｙ－ｖ｜≤ｓΩ（ｘ－ｕ，ｙ－ｖ）｜ｘ－ｕ｜ｎ－１｜ｙ－ｖ｜ｍ－１ｆ（ｕ，ｖ）ｄｕｄｖ且Ω（ｘ′，ｙ′）为文献［８］中建立的积域Ｓｎ－１×Ｓｍ－１上的一类ｂｌｏｃｋ－空间中的函数。这一结果是这类带粗糙核的积分算子在单参数下ｐ＝２时结果的改进和扩充。     

一类算子在Triebel-Lizorkin空间的有界性

利用Littlewood-Paley分解及权估计,在Triebel-Lizorkin空间上得到了一类奇异积分算子在Tf(x)=sum form j=-∞ to +∞(Kj*f(x))的有界性.作为应用,对粗糙核奇异积分算子TΩf(x)=p.v.integral from n=n″(Ω(y)/ρ(y)~β)f(x-y)dy,也得到了相应的结果,从而推广了已有结果.     

具有粗糙核的奇异积分算子及其交换子在加权（L^q，L^p）^α（R^n）空间上的有界性

利用Ap权性质及分析中的不等式,讨论具有粗糙核的奇异积分算子TΩ及其与BMO函数b生成的交换子{ b, TΩ}在加权共合空间（L^q,L^p）^α（R^n）上的有界性,其中1＜;q≤α＆lt;p≤∞。     

粗糙核奇异积分算子在加权Campanato空间上的有界性

当核函数Ω满足Lr-Dini条件时,证明了粗糙核奇异积分算子在加权Campanato空间上是有界的.     

Marcinkiewicz积分交换子的有界性质

奇异积分算子及其交换子是调和分析的重要算子,共有界性问题是调和分析的两大中心内容之一,在数学学科和交叉学科领域有重要的应用.积分交换子由积分算子和函数生成,b(x)是属于加权Lipschitz空间的一个局部可积函数,Ω是具有消失性质的零次齐次函数且满足对数型Lipschitz条件,μΩ是定义在Ω上的Marcinkiewicz积分算子.综合上述的b(x)和μΩ生成的Marcinkiewicz积分交换子μ6Ω则必然是Lp(ω)到Lq(ωl-q)的有界算子.     

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.