关于差分方程un＋r=Σ（n＋r,i=1）aiun＋r—i—bn的显示解

给出了差分方程｛ｕｎ＋ｒ＝Σ（ｎ＋ｒ，ｉ＝ｉａｉｕｎ＋ｒ－ｉ＋ｂｎ ｕｉ＝ｃｉ ｉ＝０，１，…，ｒ－１的一个显示解，ｕｎ＝ｄｎ＋Σ（ｎ，ｉ＝ｄｎｉｋ＋ｋ＋２…＋ｉｋｉ（Σ（ｉ，ｊ＝１ｋｊ）！Π（ｉ，ｊ＝１）ａｉｋｊ／Π（ｉ，ｊ＝１）ｋｊ！．     

关于约化李代数结构常数的一个公式

使用分析的方法得约化李代数结构常数适应的一个公式，这就是Ｃｉ＝Σ（ｎ，ｊ＝１，ｊ≠１）（－１）＾ｊＣ＾ｊｎδ（ｊ，ｉ）＝０，ｉ＝１，…ｎｂ。这里Ｃ＾ｊ ｊｉ是结构常数：δ（ｊ，ｉ）的值，当１，…ｉ，…，ｊ，ｉ，ｊ＋１…ｎ是偶排列时为１，否则为－１，这里ｉ表示该排列中ｉ不出现在第ｉ个位置上。     

多滞量具有正负系数的一阶中立型时滞微分方程的稳定性

本文考虑一阶中立型时滞微分方程（１）：［ｘ（ｔ）＋Σ＾ｎ１ｉ＝１ｃｉ（ｔ）ｘ（ｔ－ｒｉ）］＾１＋Σ＾ｎ２ｋ＝１ｐｋ（ｔ）ｘ（ｔ－τｋ）－Σ＾ｎ３ｊ＝１ｑｉ（ｔ）ｘ（ｔ－σｊ）＝０的稳定性。这里ｐｋ（ｔ），ｑｉ（ｔ）∈Ｃ（［ｔ０，＋∞），Ｒ），γｉ，τｋ，σｊ均为非负实数，我们建立了此方程的一个稳定性结果，较文献［６］讨论得更广泛，所得结论更深刻。     

乘积矩阵的奇异值估计

本文给ｍ个矩阵乘积的奇异值估计：ｍ∑ｊ＝１ｉ（ｊ）＝（ｍ－１）ｎ＋ｉ＾ｍａｘ（ｍ）Ⅱ（ｊ＝１）σ＾（ｊ）ｉ（ｊ）≤σｉ≤（ｍ）∑（ｊ＝１）＝ｉ＋ｍ－１ｍｉｎ＾（ｍ）Ⅱ（ｊ＝１）σ＾（ｊ）,ｉ（ｊ）,１≤ｉ≤ｎ同时给出了（ｋ）∑（ｉ＝１）σｉ,＾（ｋ）Ⅱ（ｉ＝１）σｉ的一个下界。     

一类双线性时间序列模型的矩估计

研究一类对角双线性模型ｘｔ＋Σｉ＝１ ｐ ａｉｘｔ－ｉ＝ｅｔ＋Σｊ＝１ ｑ ｂｊｅｔ－ｊｘｔ－ｊ的矩估计方法,着重分析一般模型ｘｔ＝ｅｔ＋ｂｅｔ－１ｘｔ－１的高阶矩估计及其大样本性质。方法 计算模型的矩,理论证明时运用中心极限定理,采用计算机仿真方法验证模型参数。结果与结论 获得一阶模型的高阶矩会计和一般模型的低阶矩估计,并给出仿真结果和说明,得到一阶模型的高阶矩估计的极限分布。     

中立型线性微分—差分方程的稳定性

应用Ｌｉａｐｕｎｏｖ泛函法研究了［ｘ（ｔ）－Σｋｉ＝１Ａｉｘ（ｔ－τｉ）］′＝－Ｂ０ｘ（ｔ）－Σｋｉ＝１Ｂｉｘ（ｔ－τｉ）中立型微分－差分方程的稳定性，其中ｘ∈Ｒｎ，Ｂ０，Ａｉ，Ｂｉ（ｉ＝１，２，…，ｋ）皆为ｎ×ｎ阶实常阵，τｉ∈（０，＋∞）（ｉ＝１，２，…，ｋ）．得到了该方程平衡态稳定性的几个充分判据     

由位置码性质所确定的集合的Hausdorff维数

设Ｆ为一Ｍｏｒａｎ集，Ω＾ｗ＝П↑∞↓ｉ＝１｛１，２，…，ｎ｝，φ为Ω＾ｗ→Ｆ的一个相关的自然满射；Γｉ，…，Γｋ两两不交且∪↑ｋ↓ｉ＝１Γｉ＝｛１，２，…，ｎ｝。令Ｈ（Γｉ，…，Γｋ）＝φ（Ｈ（Γｉ，…，Ｆｋ）），此处Ｈ（Γｉ，…，Γｋ）＝｛σ∈Ω＾ｗ：ｌｉｍ↓ｌ→∞Ｃａｒｄ｛１≤ｉ≤ｌ：σ（ｉ）∈Γｊ｝／ｌ＝Σ↓ｉ∈Гｊｃｉ，１≤ｊ≤ｋ｝。这里ｃｉ≥０且Σ↑ｎ↓ｉ＝１ｃｉ＝１。得到了下列结论：     

正值幂函数乘积的极小和问题

研究下述非线性规划ｍｉｎ↓ｘ∈ＸΣ↑ｓ↓ｊ＝１П↑ｋ↓ｉ＝１ｆｉ＾ｐｊ＾ｊ（ｘ）这里ｆｉｊ：Ｘ→Ｒ＾＋，ｐｉｊ≥０，Σ↑ｋ↓ｊ＝１ｐｉｊ＝１，ｉ＝１，２，…，ｋ，ｊ＝１，２，…，ｓ．Ｘ是Ｒ＾ｎ中非空紧集。借助加权平均值不等式将问题转化为含参数函数之和的极小化问题。证明了最优参数只需取一些特定的值。特别当ｆｉｊ是线性齐次函数，Ｘ为凸多面体时，其最优解必定可以在Ｘ的顶点达到。同时给出了可行点为最优解的     

插值曲线的构造和光滑问题

通过对Ｂ－Ｂ曲线和Ｌａｇｒａｎｇｅ曲线相互关系的研究，给出端点信息为ｄｉｄｔｉＧ（ｊ）（ｊ＝０，１，ｉ＝１，２，…，ｒ＜［ｄ／２］），而内点信息为Ｐｉ＝Ｇ（ｔｉ）（０＜ｔｉ＜ｔｉ＋１＜１，ｉ＝０，１，…，ｄ－２ｒ＋２）的ｄ次多项式曲线Ｈ（ｔ）的一种构造方法，从而解决了“既插值给定的内点信息，又在连接点处ｒ一阶光滑”的关键性问题     

关于有理系数微分方程的复振荡理论

证明了：如果Ｂｋ－ｊ（ｊ＝１,…,ｋ）为有理函数,在。点有ｎｋ－ｊ（＞０）阶极点,存在某个Ｂｋ－ｓ（１≤ ｓ ≤ ｋ）满足：当ｊ≠ ｓ时,有ｎｋ－ｊ／ｊ＜ｎｋ－ｓ／ｓ．假设Ｆ（ｚ）０为亚纯函数,且λ（１／Ｆ）＜σ（Ｆ）＝β＝（ｎｋ－ｓ＋ｓ）／ｓ．如果微分方程ｆ（ｋ）＋ Ｂｋ－１ｆ（ｋ－１）＋…＋ Ｂ０ｆ＝ Ｆ的所有解为亚纯函数,则每个解／满足σ（ｆ）＝（ｎｋ－ｓ＋ｓ）／ｓ．     

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