关于Diophantine方程 x3-33m=2Dy2

设D是无平方因子正奇数.证明了:当D不能被6k 1之形素数整除时,如果方程x3?33m=2Dy2有适合gcd(x,y)=1的正整数解(x,y,m),则D≡1(mod4),D的素因数p都满足p≡11(mod12),而且D的素因数个数必为偶数.     

关于丢番图方程x3+p3n=Dy2

设D是大于 2且不含σk +1之形素因数的无平方因子正整数 ,p是适合p D的素数。本文证明了 :当p>3且p ± 1(mod 12 )时 ,如果D有素因数q适合q≡ 1(mod 4) ,则方程x3 +p3n =Dy2 没有适合gcd(x ,y) =1的正整数解 (x,y ,n)。     

一类Diophantine方程及其他的整数解

目的研究不定方程x3±8=Dy2的可解性问题。方法利用初等及代数方法。结果设D是不含3和6k+1之形素因数的无平方因子正整数。当D>5时,如果D的素因数p都满足p≡1,3(mod 8)或者p≡5,7(mod 8),则方程x3±8=Dy2没有适合gcd(x,y)=1的正整数解(x,y)。结论部分地解决了该方程的可解性问题。即对某些特殊D,该方程无解。     

关于Diophantine方程x3-23n=Dy2

设D是不能被6k 1之形素数整除的无平方因子正奇数时,论文证明了:如果D≡1,3(mod8)或D有适合p≡5(mod12)的素因数p,则方程2332Dyxn=-没有适合n>1的正整数解(x,y,n).     

关于Pell方程x2－6y2＝1与y2－Dz2＝4的公解

该文证明了：1) 若p1，…，ps是不同的奇素数，则当D＝p1…ps(1≤s≤3)时除开D为11,11×89×109,11×97×4801外，方程组G：x2－6y2＝1与y2－Dz2＝4仅有平凡解(x，y，z)＝(±5，±2,0)；2)若D是无平方因子正整数，则当D为偶数且D没有适合p≡1(mod 24)以及p≡7(mod 24)的素因数p，则方程组G仅有平凡解(x，y，z)＝(±5，±2,0).     

关于Diophantine方程x3+33m=2Dy2

证明了当D(无平方因子正奇数)不能被6k+1之形素数整除时,若方程x³+3^3m=2Dy²有适合gcd(x,y)=1的正整数解(x,y,m),则D≡1(mod 4),D的素因数p都满足p≡11(mod 12),而且D的素因数个数必为偶数.     

关于三次Diophantine方程x~3+1=2p_1p_2Qy~2的可解性

设p_1,p_2是适合_p1≡p_2≡1(mod 6)以及(p_1/p_2)=-1的奇素数,其中(p_1/p_2)是Legendre符号。设Q是至少有两个不同素因数且每个素因数q都满足q≡5(mod 6)的无平方因子正整数。运用初等数论方法证明了:如果p_1≡1(mod 8),p_2≡5(mod 8),Q≡1(mod 4),那么方程x~3+1=2p_1p_2Qy~2无正整数解(x,y)。     

关于Diophantine方程kx4-(2k+4)x2y2+ky4=-4

利用Pell方程及同余的性质给出了Diophantine方程 G:kx4-(2k+4)x2y2+ky4=-4仅有整数解(|x|,|y|)=(1,1)的充分条件。证明了:1)若k 12(mod16),则Diophantine方程G 仅有整数解(|x|,|y|)=(1,1);2)若k=4m,m≡3(mod4),且2s或s≡0(mod4),t≡3,5(mod8)或s≡2(mod4),t≡1,7(mod8),则Diophantine方程G 仅有整数解(|x|,|y|)=(1,1),这里s+t m 是Pell方程x2-my2=1的基本解。
     

关于Diophantine方程kx~4-(2k+4)x~2y~2+ky~4=-4

利用Pell方程及同余的性质给出了Diophantine方程G:kx4-(2k+4)x2y2+ky4=-4仅有整数解(|x|,|y|)=(1,1)的充分条件。证明了:1)若k≠12(mod 16),则Diophantine方程G仅有整数解(|x|,|y|)=(1,1);2)若k=4m,m≡3(mod4),且2︱s或s≡0(mod 4),t≡3,5(mod 8)或s≡2(mod 4),t≡1,7(mod 8),则Diophantine方程G仅有整数解(|x|,|y|)=(1,1),这里s+t m1/2是Pell方程x2-my2=1的基本解。     

关于Diophantine方程x3+33n=Dy2

设D是无平方因子正整数．证明了：当D不能被形如6k 1之形素数整除时，如果D含有素因数p适合P=5(mod 12)，则方程x^3 3^3n=Dy^2没有适合god(x，y)=1的正整数解(x，y，n)．     

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。     

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.