一个数论函数及其均值

对任意正整数n,设IKk(n)表示不小于n的最小k次幂 ,以及FKk(n)=IKk(n)-n,利用初等方法和解析方法,研究了新定义的数论函数FKk(n)的均值性质, 并给出了一个较强的均值渐近公式.     

关于可乘函数的复合函数均值

对任意正整数n,设IKk(n)表示不小于n的最小k次幂 ,以及FKk(n)=IKk(n)-n,利用初等方法和解析方法,研究了新定义的数论函数FKk(n)的均值性质, 并给出了一个较强的均值渐近公式.     

关于Smarandache函数的复合函数的均值

对任意的正整数n,定义数论函数W(n)为最小的正整数k,使得n≤k(3k+1),即W(n)=min{k:n≤k(3k+1),k∈N}.利用初等及解析的方法研究复合函数S(W(n))的均值分布,并获得了较强的均值分布的渐近公式.     

关于Smarandache函数的复合函数的均值

对任意的正整数n,定义数论函数W（n）为最小的正整数k,使得n≤k（3k＋1）,即（）W（n）=min{k：n≤k（3k＋1）,k∈N}.利用初等及解析的方法研究复合函数S（W（n））的均值分布,并获得了较强的均值分布的渐近公式.     

两个新的数论函数的混合均值

对任意正整数n,定义数论函数Ω(n)为Ω(1)=0,当n>1,n=pα11pα22…pαss为n的标准分解式,Ω(n)=α1p1+α2p2+…+αsps,其中(pi为素数,1≤i≤s)。数论函数Sk(n)定义为Sk(n)=m in{m:m∈N,nk|m!},即最小正整数m,使得nk|m!。运用初等方法研究数论函数Ω(n)与Sk(n)的混合均值问题,并得到一个有趣的渐近公式。     

伪Smarandache函数的混合均值

对任意的正整数n,伪Smarandache函数Z(n)定义为最小的正整数m使得n|m(m+1)/2,,即Z(n)=min{m∶n|m(m+1)/2,m∈N}.而数论函数D(n)定义为最小的正整数m使得n|d(1)d(2)d(3)…d(m),其中d(n)为Dirichlet除数函数,即D(n)=min{m:m∈N,n|∏i=1md(i)}.利用初等方法和解析方法研究了伪Smarandache函数Z(n)与数论函数D(n)的混合函数Z(n)·ln(D(n))的均值问题,并得到一个较强的渐近公式.     

关于Smarandache函数LS（n）均值研究

著名的Smarandache函数S（n）定义为：对于任意正整数n,存在最小的正整数m,使得n｜m,即：S（n）=min{m：n｜m,m∈N},本文利用初等及解析方法,研究了LS（n）的均值分布性质,否定了美籍数论专家F.Luca教授提出的一个猜想。     

关于两个可乘函数的均值

设k为给定的正整数,利用最大公约数定义数论函数f(n)=(n,k).本文的主要目的是利用解析方法研究函数U(n,k)和V(n,k)的均值性质,并给出两个渐近公式.结果表明这两个函数具有较好的均值分布性质.     

p次幂原数函数Sp(n)和它的均值性质

设p为素数,n为任意的正整数,我们定义p的原数函数为最小的正整数m,使得pn|m!即就是SP(n)=min{m∶pn|m!},其中p为素数.本文研究了这一类Smarandache数论函数p次幂原数函数Sp(n)的均值性质,并给出关于|Sp(k(n+1))-Sp(kn)|和|Sp(k(n+1))-Sp(kn)|2的渐近公式.     

p次幂原数函数Sp（n）和它的均值性质

设p为素数,n为任意的正整数,我们定义p的原数函数为最小的正整数m,使得pn｜m!即就是SP（n）=min{m∶pn｜m!},其中p为素数.本文研究了这一类Smarandache数论函数p次幂原数函数Sp（n）的均值性质,并给出关于｜Sp（k（n＋1））-Sp（kn）｜和｜Sp（k（n＋1））-Sp（kn）｜2的渐近公式.     

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.     

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.     

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。     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with