规范不变的介子波函数和介子质量谱

近年来,在研究两体束缚态方面,H·Suura和他的合作者做了一系列工作,取得了较好的成果。他在文献[1]中,定义了一个规范不变的夸克——反夸克两体振幅,提出了一个等时的相对论方程,以代替Bethe—Salpeter方程,来确定夸克和反夸克构成的介子质量     

用相对论HF理论研究核物质的性能

本文在重正化的相对论量子场理论框架中导出了包含介子和重子的无限系统的相对论ＨＦ方程。方程的导出是以一个图解近似和重子传播子的Ｄｙｓｏｎ方程为基础。结果得到了一组带有一个关于单粒子光谱自洽条件的耦合的，非线性的重子自能的积分方程。对模型参数重正代之后可以复制核物质的饱和特性，ＨＦ结果在低密到中等密度处类似于平均场（Ｈａｒｔｒｅｅ）近似     

用Spinless Salpeter方程求解超对称束缚态质谱

超对称理论（SUSY）是TeV能级以上新物理的一种备受关注的可能理论框架.在该理论中,预言了超对称伴粒子的存在.其中,超对称粒子-最轻标量轻子τ1的寿命可能比较长,有可能与其他粒子形成超对称束缚态.采用Spinless Salpeter方程来描述超对称束缚态.Spinless Salpeter方程是Bethe-Salpeter方程的一种很好的近似,是Schrodinger方程的相对论推广.一般情况,Spinless Salpeter方程没有解析解,所以用数值方法求解Spinless Salpeter方程得到超对称束缚态τe,τμ,τp（或它们的反粒子）的质谱（或者束缚能）.     

用MANDELSTAM修正过的GELL MANN LOW方法计算顶角DDσ的形状因子和耦合常数

计算了DDσ相互作用的形状因子和耦合常数. 为了把D0介子具有内部结构的效应考虑进去,用Bethe Salpeter振幅来描述重介子态. 夸克流在重介子态之间的矩阵元通过Mandelstam修正过的Gell Mann Low方法计算. 对于这一方法所要求的Bethe Salpeter不可约核,采用了最低阶近似. 在得到DDσ相互作用的形状因子后,计算了DDσ的耦合常数.     

介子波函数的对称性

文献[1]提出了一个具有内部相对论性的介子结构模型。我们发现,0~(- )介子和1_(--)S波介子的Bethe—Salpeter(以下简称BS)振幅的旋量结构强烈地依赖于位势的旋量结构。若在BS方程中取投影位势V~((A))=V((T))=0,则由0~(- )介子和1~(--)S波介子的BS方程解出的旋量结构分别对应于相应介子的类自由旋量结构。在这种旋量结构中,只有     

J/Ψ和Υ家族的轻子衰变和辐射跃迁宽度

从伸缩子-胶子有效耦合理论得到的重夸克势(Dilaton)势出发，计算了重介子的轻子衰变和辐射跃迁宽度，并与Cornell势所得到的相应结果作了比较．结果表明，Dilaton势的计算结果比Cornell势的相应结果更好地符合实验数据．     

夸克囚禁库仑—谐振迭加势与二步势,类分子势重夸克偶素能谱的比较

夸克囚禁库仑－谐振迭加势与二步势、类分子势重夸克偶素能谱的比较吴邦惠（物理系）应用各种类型的相对论或非相对论方程研究夸克偶素（ｑｑ）能谱的性质,对于揭示夸克间相互作用的特点是有意义的．文［１～５］曾用多种不同形式的位势对０－和１－介子进行了研究,得到...     

谐振子势下的QQg介子

本文研究了重Hybrid介子QQg。从重夸克偶素QQ位势写出QQg体系中QQ,Qg,Qg间的有效位势,并采用谐子势得到了胶子球对称分布下的QQ介子的质量谱及其波函数的解析表达式。     

相对论Lindhard函数和粒子－空穴激发

用两种方法计算子核物质中π介子传播了的极化插入．通过计算π介子的色散关系，发现在低动量转移区相对论与非相对论的差别很小；πＮＮ的膺标量与膺矢量耦合之间的差别即使对大动量转移区也很小；在所有情况下，没有π凝聚现象出现．     

重介子谱的真空色屏蔽效应

在重夸克势模型理论框架下，研究了重介子谱的色屏蔽效应，结果表明，具有真空色屏蔽效应的重夸克势对重介子的实验能谱给出了更好的理论解释。     

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.     

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.     

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.     

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.     

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。     

On Tragic Consciousness In The Works By Ernest Hemingway

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.     

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.