一类交错级数的递推求和

本文利用一个简单的递推式求得交错级数的和Ｓ２ｋ＋１．     

2类图的完美匹配数的分类递推求法

首先,把图的完美匹配按关联某个顶点的边进行分类,求出每一类完美匹配数目的递推关系式.其次,把各类完美匹配的递推式相加,得到一组有相互联系的递推关系式,再利用这些递推式之间的相互关联,消去那些不需要的递推关系式,从而得到这个图的完美匹配数目的递推关系式.最后解出这个递推式的通解,进而得到这个图的完美匹配数目的显式公式.     

目标的Dempster-Shafer融合识别

针对多传感器的目标识别问题,文中给出并证明了两个传感器 Ｄｅｍ ｐｓｔｅｒ Ｓｈａｆｅｒ （ Ｄ Ｓ）融合识别同一目标时的若干结论及其归纳的结论,同时推出了多（＞ ２）传感器 Ｄｅｍ ｐｓｔｅｒ Ｓｈａｆｅｒ 融合识别同一目标时的递推式,并分析了它们的性质。这些研究是多传感器目标识别系统中不同类传感器的选择及其信息的有效 Ｄ Ｓ融合的理论依据,且融合识别的递推式不仅可减少计算的复杂度,增强多传感器分布识别的可调性,而且可用作多传感器实时融合识别的递推式,这对解决机器人及其军事等领域的目标识别问题有重要价值     

某些递推数列通项的求作(摘要)

所谓递推数列,指由递推式所确定的数列{a_n},关于递推数列通项的求法,本文主要介绍了几类常见的递推类型.     

2类图完美匹配计数公式的嵌套递推求法

把图2-nD_8和2-nD_6的完美匹配按饱和某个顶点的完美匹配进行分类,求出每一类完美匹配数目的递推关系式,再利用这些递推式之间的相互关系,得到这两类图的完美匹配数目的递推关系式,最后从递推式中解出这两类图的完美匹配数目的计算公式.     

关于n~(1/2)∫_0~(π/2)(sin~nxdx(n→∞))渐近级数展开计算

运用文献［１］的结果建立了如下的渐进展开式：ｎ∫π／２０ｓｉｎｎｘｄｘ～π２∞ｉ＝０ａｉｎｉ其中，ａｌ由下面的递推公式所决定：ｌｉ＝０ａｉｂｌ－ｉ＝（－１）ｌ１／２（１／２－１）…（１／２－ｌ＋１）ｌ！，ａ０＝１，ｌ＝１，２，３式中：ｂ０＝１，ｂ１＝ａ１，ｂｉ＋１＝ａ１＋ｉ１！ａ２＋ｉ（ｉ－１）２！ａ３＋…＋ｉ（ｉ－１）…（ｉ－ｉ＋２）（ｉ－１）！ａｉ＋ｉ！ｉ！ａｉ＋１，ｉ＞１这个新递推公式的作用是简化了系数计算的复杂性。此外，还给出了有关的Ｗａｌｉｓ公式渐进性的应用。     

延迟m序列线性组合的递推算法

在建立延迟ｍ序列产生器的电路模型的基础上，把延迟ｍ序列由ｍ序列产生器某些寄存器级模２和而成的组合问题映射为互反序列产生器的状态，推导出互反序列产生器状态的递推式，提出了延迟ｍ序列线性组合分析的普遍递推算法     

随机利率下离散信用风险模型和破产概率

在随机利率服从有限齐次Markov链下建立了离散信用风险模型，得到有限时间破产概率的递推等式和最终破产概率的积分等式，给出了一个优于Lundberg不等式的上界以及破产时刻余额分布的递推等式。     

一类代数几何码的伴随式阵列

主要讨论了一点代数几何码的伴随式阵列及其上的线性递推关系。通过缩简多项式概念的建立和理想这个数学概念的运用，将译码时真正需要的线性递推关系和这种伴随式阵列固有的线性递推关系区别开来，达到了从一点代数几何码的伴随式阵列的线性递推关系中将其固有的线性递推关系剔除掉的目的。在定理５的证明中还蕴涵了寻找一个多项式的缩减多项式的算法，这些结果对进一步研究Ｆｅｎｇ等提出的译码算法和Ｓｋａｔａ等提出的译码算法有     

关于自然数同次幂和的研究

得到了自然数正整数幂和ni=1ip(P为正整数)新的一般递推式与幂P为偶数和奇数时的特殊递推式,并给出了自然数非整数幂和(P为非整数)的两个最新的精密的估计式.     

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