形变硬化指数与强度的关系

从硬化指数的定义出发导出了形变硬化指数ｎ与强度参量之间的关系为ｎ＝Ａ（１－σⅠ－／σⅡ）＋Ｂ，σⅠ和σⅡ为真应力应变曲线上一直线段两端点的应用力，Ａ和Ｂ为常数，它适用于单一ｎ值情况，双ｎ特性，单调加载和循环应力应弯曲线，对均匀变形阶段，又导出了ｎ和屈强比的关系，即ｎ＝１－√σｓ／σｂ，该式没有任何特定常数和经验常数，和测量值相比９０％以上的数据的绝对误差在±０．０３以内，它表示了材料的均匀变形能力     

一类约束下的参数估计问题

考虑线性模型ｙｎ×１＝Ｘｍ×ｐβｐ×１＋εｎ×１，（１）其中ｙｎ×１为样本观测值，Ｘ为ｎ×ｐ阶的设计阵，β为ｐ维参数向量，εｎ×１为ｎ维随机向量，ε为随机误差．Ｅε＝０，Ｄε＝σ２Ｖ这里σ２已知或未知皆可，Ｖ为ｎ×ｎ阶非负定阵．对于线性模型（１），...     

线性结构关系模型参数估计的强收敛速度

该文讨论了线性结构关系模型｛β’ｘｋ＋α＝０ ζｋ＝ｘｋ＋εｋ ｛εｋ，ｋ＝１，２，…，ｎ｝，ｉ，ｉ，ｄ。ｋ＝１，２，…，ｎ，Ｅ（ε１）＝０ ｖａｒ（ε１）＝σ＾２Ｉｍ式中，｛ｘｋ，ｋ＝１，２，…，ｎ｝为一组ｉ．ｉ．ｄ。的不可观测的ｍ维随机向量，｛ｘｋ，ｋ＝１，２，…，｝，与｛εｋ，１，２，…，ｎ｝相互独立。     

半线性椭圆方程Δu—a（x）u＋b（x）u^p=0 Dirichlet问题的奇异解

证明了半线性椭圆方程Δｕ－ａ（ｘ）ｕ＋ｂ（ｘ）ｕ＾ｐ＝０的Ｄｉｒｉｃｈｌｅｔ问题，当１〉ｐ〉（ｎ＋２）／（ｎ－２），ｎ≥３，且ａ（│ｘ│），ｂ（│ｘ│）满足适当条件时有无穷多奇异正解。     

一种新型的拉伸应力应变曲线规律研究

研究发现低层错能的亚稳材料低温拉伸存在一种新型的应力应变曲线．曲线表现为弹塑性失稳εｐｈ 、应力平台εＬ 及硬化指数ｎ 为不恒值的３ 个特点．试验结果表明：εｐｈ 、εＬ 随应变率增加而增大,硬化率ｄσ／ｄε与硬化指数ｎ 随应变量的增加呈抛物线型．弹塑性失稳及应力平台本质上不同于稳定态材料的上、下屈服及屈服平台,而是由相变引起的新的屈服机制,即弹塑性失稳是应变诱发马氏体转变的起始状态,应力平台是相变软件与硬化动态平衡的结果     

尖端效应的一种近似描述

以旋转抛物面模拟尖端，给出导体尖端效应的一种近似描述即电荷面密度σ与高斯曲率Ｋ的关系σ＝σο根号ｍＫ１／４，σο是尖端顶点σ的值，可通过测出该点法向线程Δｎ的电势差ΔＶ获得，σο＝εＥ≈２εＨοΔＶ／〔ｅｘｐ（－２ＨοΔｎ）－１〕．σ分布的这一关系为其工程测量提供了依据。     

复合图Ga（u）⊙UV⊙G2（V）的niche数

复合图Ｇ１（ｕ）⊙ｕｖ⊙Ｇ２（ｖ）是将简单图Ｇ１的顶点ｕ与简单图Ｇ２的顶点ｖ用边ｕｖ连接成的图。本文证明，若Ｇ１和Ｇ２都是有限ｎｉｃｈｅ图，则当连接点ｕ，ｖ满足一定的条件时，复合图Ｇ１（ｕ）⊙ｕｖ⊙Ｇ２（ｖ）也是有限ｎｉｃｈｅ图，且ｎ（Ｇ１（ｕ）⊙ｕｖ⊙Ｇ２（ｖ）０≤ｎ９Ｇ１）＋ｎ（Ｇ２）－ｒ其中，ｒ＝０，１，２。     

关于一组同余方程解的概率分布问题

主要研究整数ａ，ｂ，ｃ，ｄ满足：ａｂｃｄ≡１（ｍｏｄｎ）且１≤ａ，ｂ，ｃ，ｄ≤ｎ－１时｜ａ＋ｂ－ｃ－ｄ｜的分布性质，即对给定的０＜σ＜２，讨论极限的分布问题，并对某些特殊σ给出一个有趣的概率分布定理。     

一类电报方程解的Sobolev指数

对一般的偏微分方程,其Ｓｏｂｏｌｅｖ指数为（ｎ２＋１）,Ｐｏｎｃｅ和Ｓｉｄｅｒｉｓ（Ｃｏｍｍｕｎ．ｉｎＰＤＥ,１９９３,１８（２～４）：１６９）证明了对一些具特殊非线性项的半线性方程,如ｕｔ－Δｕ＝ｕｋ（Ｄｕ）α（ｘ∈Ｒｎ,ｋ∈Ｚ＋,ρ＝｜α｜≥２）,其Ｓｏｂｏｌｅｖ指数会在ｎ２与（ｎ２＋１）之间,本文研究半线性电报方程ｕｔ－Δｕ＋ｐｕ＝ｕｋ（Ｄｕ）α（ｘ∈Ｒｎ,ｋ∈Ｚ＋,ρ＝｜α｜≥２,ｐ≠０）,得到了其Ｓｏｂｏｌｅｖ指数仍然在区间（ｎ２,ｎ２＋１）之内,因此本文可以看作是Ｐｏｎｃｅ和Ｓｉｄｅｒｉｓ工作的继续     

关于frame SOLS存在性的进一步结果

已经证明对ｕ≥２，ＦＳＯＬＳ（３￣ｎｕ￣１）存在的充分必要条件是ｎ≥４且ｎ≥１＋２ｕ／３，除去可能的例外ｎ∈｛６，１０，１４，１５，１８，１９，２２，３０，３４，３８，４２，４６，５４，５８，６２，６６，７０，９４｝．本文证明除７２对（ｎ，ｕ）值外，ＦＳＯＬＳ（３￣ｎｕ￣１）存在的充分必要条件是ｎ≥４且ｎ≥１＋２ｕ／３．     

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.     

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。     

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.     

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.     

A computer generator for randomly layered structures

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