线性模型参数估计中的效率

对一般的ＧａｕｓＭａｒｋｏｆ模型：Ｙ＝Ｘβ＋ｅ,Ｅ（ｅ）＝０,Ｃｏｖ（ｅ）＝σ２Ｖ,Ｖ≥０,给出了μ＝Ｘβ的最小二乘估计的３种相对效率和它们的下界．对一般的方差分量模型：Ｙ＝Ｘβ＋ｅ,Ｅ（ｅ）＝０,Ｃｏｖ（ｅ）＝∑ｔｉ＝１θｉＶｉ,θｉ＞０,Ｖｉ≥０,相拟地定义了μ＝Ｘβ的最小二乘估计的３种相对效率并给出了它们的下界．     

一般线性模型下删除观测值的影响

在一般情形下，给出了在模Ｍ＝（Ｙ，Ｘβ，σ＾２Ｖ）与删除第ｉ个观测值后得到的模型Ｍｄ＝（Ｙｄ，Ｘｄβ，σ＾２Ｖｄ）下Ｘｄβ的最佳线性无偏估计的表达式，得到了二者相等的充要条件，给出了在模型Ｍｄ下Ｘｄβ的最小二乘估计是Ｍ下Ｘｄβ的最佳线性无偏估计的充要条件，以及Ｍｄ下σ＾２的最小范数二次无偏估计是Ｍ下σ＾２的最小范数二次无偏估计的充要条件。     

计算Kdv方程守恒密度的待定系数法

秩为ｒ的不可约单项式的集合Ｓｒ可以直接转化为Ｓ（ｒ＋１），多项式守恒密度Ｔ（ｒ＋１）＝Ｔ＿（ｒ＋１）￣０＋Ｕ＿（ｒ＋１），Ｔ＿（ｒ＋１）￣０的每一项都含因子ｕ＿０，可从Ｔ＿ｒ得到Ｕ＿（ｒ＋１）（ＣＳ＿（ｒ＋１））的每一项不含因子ｕ＿０，Ｕ＿（ｒ＋１）与Ｔ＿（ｒ＋１）￣０的项之间存在着特殊的相关性，由此可分批求出Ｕ＿（ｒ＋１）中的特定系数且不涉及Ｘ＿（ｒ＋１）。     

植物生长调节剂和蔗糖对抗黑胫病香果树丛芽分化的影响

将抗黑胫病香果树愈伤组织在ＢＡ、ＮＡＡ、蔗糖３因素条件下作Ｌ＿９（３￣４）正交组织培养试验．结果表明，ＢＡ、ＢＡ与ＮＡＡ的交互作用对抗病香果树愈伤组织丛芽分化有极显著影响．ＢＡ／ＮＮＡ（Ｘ）与芽分化（Ｙ）的关系为Ｙ＝１．３６５１Ｘ￣（０．１２８６），ＢＡ／ＮＡＡ（Ｘ）和ＢＡ＋ＮＡＡ（Ｙ）与芽分化（Ｚ）的关系为Ｚ＝１．１０３３＋０．０９９９（Ｘ＋Ｙ）－０．００２７（Ｘ＋Ｙ）￣２，ＢＡ／ＮＡＡ（Ｘ）和蔗糖浓度（Ｙ）与芽分化（Ｚ）的关系为Ｚ＝１．０７４０＋０．０７９３（Ｘ＋Ｙ）－０．００１７（Ｘ＋Ｙ）￣２．在本该试验范围内，丛芽分化的最适培养基为ＭＳ＋ＢＡ２ｍｇ／Ｌ＋ＮＡＡ０．１ｍｇ／Ｌ＋蔗糖３％．     

Gauss—Markoff和方差分量模型中LSE的一种新的相对效率

对Ｇａｕｓｓ－Ｍａｒｋｏｆｆ模型：Ｙ＝Ｘτ＋ｅ，ｅ￣（０，ο＾２Ｖ），Ｖ≥０，τ的ＬＳＥ的一种新的相对效率被提出来并得到了其下界，对方差分量模型：Ｙ＝Ｘτ＋ｅ，ｅ￣（０，ｍΣｉ＝１ο＾ｉＶｉ），Ｖ＝ｍΣｉ＝１Ｖｉ≥０，τ的ＬＳＥ的一种新的相对效率也被提出来并得到了独立于未知参数的下界。     

Eu_（1－x）Sr_xFeO_（3－y）的~（57）Fe Mossbauer谱

报导Ｅｕ＿（１－ｘ）Ｓｒ＿ｘＦｅＯ＿（３－ｙ）（ｘ＝０．０～１．０）的固相反应法合成，测量了其Ｘ射线衍射及室温下的￣５７ＦｅＭｏｓｓｂａｕｅｒ谱。实验结果表明，Ｓｒ掺入了ＥｕＦｅＯ＿３晶格，结构变化与掺杂量密切相关。室温下￣５７ＦｅＭｏｓｓｂａｕｅｒ谱由一套反铁磁六线谱、一套顺磁双线谱和一套顺磁单线谱组成（Ｘ＝０．２，０．４，０．６）．处于立方相的Ｆｅ离子的ＩＳ介于Ｆｅ￣３＋和Ｆｅ￣４＋之间，可能参与电子跳跃。     

－取代苯对位~1H及~（13）C──NMR谱化学位移间线性关系的讨论

以一取代苯为基本模型，由一取代苯对位质子的￣１Ｈ──ＮＭＲ谱化学位移δ＿ｐ与￣（１３）Ｃ──ＮＭＲ谱化学位移δ＿ｃ＝１２８．５＋Ａ＿ｐ计算式中的取代参数Ａ＿ｐ之间的线性关系，用最小二乘方法来得一取代苯对位碳核￣（１３）Ｃ──ＮＭＲ谱化学位移经验公式：δ＇＿ｃ＝９．２＋１６．３９δ＿ｐ，其计算结果与文献值相一致。     

多元线性模型回归参数M－估计的强相合性

讨论多元线性回归模型由极小化问题的解定义的Ｍ－估计β＿ｎ的强相合性，其中Ｘ＿ｉ为ｍ×ｐ矩阵．证明了：无论为随机向量（（ＶｅｃＸ）￣′，Ｙ′）的独立同分布观察向量还是Ｘ＿ｉ为已知的ｍ×ｐ设计阵，在适当的条件下β＿ｎ都是参数真值β＿０的强相合估计．     

1—苯基—3—甲基—4—（α—呋喃甲酰基）—5—吡唑酮与中性萃取剂协同萃取钇（Ⅲ）的研究

本文研究了１－苯基－３－甲基－４－（α－呋喃甲酰基）－５－吡唑酮（ＨＡ）单独萃取Ｙ（Ⅲ）及其与二苯亚砜（ＤＰＳＯ），磷酸三丁酯（ＴＢＰ）或三辛基氧膦（ＴＯＰＯ）协同萃取Ｙ（Ⅲ）的行为。确定了萃合物的组成分别为ＹＡ＿３，ＹＡ＿３·ＤＰＳＯ，ＹＡ＿３·ＴＢＰ和ＹＡ＿２（ＮＯ＿３）·２ＴＯＰＯ．算得萃取平衡常数分别为：ｌｏｇＫ＿（Ａ（ＨＡ））＝－６．８６，１ｏｇＫ＿（ＡＢ（ＨＡ＋ＤＰＳＯ））＝－３．８９，ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＢＰ））＝－２．５３和ｌｏｇＫ＿（ＡＢ（ＨＡ＋ＴＯＰＯ））＝５．１３．     

各种布尔矩阵最大广义逆

设Ａ是布尔矩阵，依据４个性质、ＡＧＡ＝Ａ，ＧＡＧ＝Ｇ、（ＧＡ）￣Ｔ＝ＧＡ、（ＡＧ）￣Ｔ＝ＡＧ的不同组合，定义了五种广义逆Ａ￣－、Ａｒ￣－、Ａ＿ｍ￣－、Ａ＿ｌ￣－、Ａ￣＋，这里Ｇ是布尔矩阵．本文中，我们证明了，如果Ａ￣－、Ａｒ￣－、Ａｍ￣－、Ａ＿ｌ￣－、Ａ￣＋，存在，那么它们一定有最大广义逆，其表示分别为（Ａ￣ＴＡ￣ＣＡ￣Ｔ）￣Ｃ、（Ａ￣ＴＡ￣ＣＡ￣Ｔ）￣ＣＡ（Ａ￣ＴＡ￣ＣＡ￣Ｔ）￣Ｃ、（Ａ￣（ＴＣ）ＡＡ￣Ｔ）￣Ｃ、（Ａ￣ＴＡＡ￣（ＴＣ））￣Ｃ、Ａ￣Ｔ．     

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…     

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。     

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     

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     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.