p 级数的性质与拓展教学研究

总结了高等数学和数学分析教学中p-级数的基本性质,并对其进行了拓展教学的研究.首先指出p-级数的基本性质及其证明过程中体现的重要数学思想.然后在此基础上进一步讨论了p-级数与欧拉常数的关系,p-级数值的实数性质以及p-级数和黎曼函数的关系.通过这些讨论,把p-级数基本性质的教学内容和现代数学前沿的重要问题结合起来,可以为相关内容的教学提供参考.     

数学分析的对数p-级数与对数p-积分

为了方便起见，将数项级数∑(lnn⁾k/n^p称为对数p-级数，将反常积分∫_c^+∞(lnx)^k/x^p dx(c>1)，∫_a^b[ln (x-a)]^k/(x-a)^p dx和∫_a^b[ln (b-x)]^k/(b-x)^p dx称为对数p-积分。对数p-级数与对数p-积分以不同的k和p的值出现在数学分析课程的各个知识环节中，收敛性随着具体参数k和p而不同，在数学分析和相关后续数学课程中有着很重要的地位。由于各类数学分析教材没有总结归纳出统一的判别其收敛性的公式化结论，导致对数p-级数与对数p-积分不能被学生熟练地掌握和使用。事实上，对数p-级数与对数p-积分的收敛性的判别完全可以公式化，根据k和p的值直接得出，这便弥补了数学分析课程在这些内容上的不足。     

有关偶完全数尾数的结论

通过对偶完全数n=2p-1(2p-1)的素指数p的取值情况的讨论,并调用、执行中国剩余定理的C语言程序,给出了其有关百位数字的结论,强化了其一些性质.     

威尔逊定理的两个推论及应用

初等数论中,威尔逊定理:“整数p≥2,当且仅当(p-1)！+1≡0(modp)时,p为素数。”是判定一个整数p≥2是否为素数的基本定理。 给定一个较大的整数p,(p-1)！是一个很大的数,利用威尔逊定理来判定p是否为素数是不方便的;但可以利用定理的充要性及用余性质来解决一些实际问题。下面介绍威尔逊定理的两个推论及应用。     

关于偶数p-级数的求和显式

在无穷级数理论中,p-级数是一个非常重要的数项级数.关于p-级数的收敛性问题早已解决,而其求和问题一直受到人们的关注.近年来,人们试图先解决偶数p-级数的求和问题,虽有进展,但并非理想.本文最终解决了这个问题,获得了偶数p-级数的一个求和显式,并给出了其交错级数的一个求和显式.     

调和级数的几个数论性质

讨论了调和级数前n项和的分子N_n的几个有趣的数论性质,并给出了几个进一步研究的问题和猜想。如果p是素数,则p|N_(p-1),p~2|N_(p-1);p>2,p是素数p|N_(p-1)。     

一类含有调和数的同余式（英文）

该文目的是创建一系列含有调和数的同余式.当p3为一素数时,利用已有的组合恒等式和同余式,得到了如下的同余式:∑p-1k=1k~2H_k~2≡79/108p-4/9(mod p~2)和∑p-1k=1H_k~3≡23/18(mod p).同时也得到了∑(p-1)/2k=1H_k~2/k≡-8/3q_p~3(2)+1/6B(p-3)(mod p)和∑(p-1)/2k=1H_(2k)~2≡-1+1/2q_p~2(2)(mod p),这里Bn(n∈N)称为Bernoulli数,当pa时,q_p(a)=(a~(p-1)-1)/p称为Fermat商.     

矩阵范数的界和方阵的ρ-条件数

本文给出了长方矩阵的p-范数及更广一类矩阵范数的上、下界又给出了方阵的p-条件数等于1的条件。(1≤p≤ ∞)。文[1]则是p=2的情况。前三节讨论p-条件数,第四节讨论长方矩阵范数的界。     

矩阵范数的界和方阵的p-条件数

本文给出了长方矩阵的p-范数及更广一类矩阵范数的上、下界又给出了方阵的p-条件数等于1的条件.(1≤p≤?).文[1]则是p=2的情况.前三节讨论p-条件数,第四节讨论长方矩阵范数的界.     

关于竞赛图的弧k-反回路性质

设T=(▽,A)是一个竞賽图.|▽|=p称T具有P_k(p′_k)性质,若 xy∈A,T中存在一条长度为k-1的y-x路(x-y路),其中2≤k相似文献   

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.     

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.     

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.     

A computer generator for randomly layered structures

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

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-