冶勒自然保护区大熊猫种群密度调查及保护

１９９４ ～１９９５ 年对相岭山系的冕宁冶勒自然保护区大熊猫种群进行了野外生态研究,以粪团作为间接指标,使用样带法、逆向截线法和传统的方法,对大熊猫种群密度进行了研究,并比较了各种方法的优缺点。结果表明：保护区内大熊猫的种群密度为０ ．０３２ ５ 只／ｋｍ ２ 。并结合当地的实际情况对大熊猫的保护提出了切实可行的对策。     

竹子开花对大熊猫生存影响分析

大熊猫是我国的国宝,保护大熊猫具有重要的社会和生态意义,竹子周期性大面积开花对大熊猫的生存造成了威胁．探讨了大熊猫栖息地竹子开花的原因,分析了竹子开花对大熊猫的影响,提出了现阶段解决竹子开花问题以保护大熊猫的对策．     

太白山自然保护区大熊猫及其栖息地的干扰因素及保护对策

描述了太白山大熊猫的分布及栖息地状况,对其保护现状和保护工作存在的干扰因素进行了分析评价．在分析评价的基础上,提出了加强大熊猫及其栖息地的保护对策,为保护好太白山大熊猫及其栖息地提供了新的思路．     

大熊猫繁育研究信息处理系统的设计与实现

利用VFP和WindowsNT ,建立大熊猫繁育研究信息的管理系统 ,实现了对大熊猫人工繁殖、饲养、管理、疾病防治、科学研究活动中原始数据及相关文献的管理 ,并在数据分析的基础上建立了相关的数学模型 ,对大熊猫繁育研究具有极为重要的意义 .     

“森林-竹子-大熊猫”三位一体生态系统维持机制数学模型研究

建立了描述"森林-竹子-大熊猫"之间关系的微分方程数学模型.通过对带有时滞和阶段结构的变系数微分系统的分析,得到了系统持续生存的条件.从理论上验证了李俊清等提出的"森林、主食竹、大熊猫"三位一体系统的稳定性维持机制,并进一步分析制约系统稳定发展的因素,为大熊猫栖息地保护提出建议.     

马边大风顶自然保护区大熊猫种群数量及动态分析

作者于１９９１年～１９９２年对凉山山系马边大风顶自然保护区大熊猫进行了野外生态调查．使用逆向截线法和样带法，以粪便为间接指标，调查了大熊猫的数量，并与传统的方法比较．结果表明，保护区内现有大熊猫３６±６只，以粪便大小、咬节长度和消化程度等确定了该种群的年龄结构，并结合种群的分布特征，对其动态作了分析．     

凉山山系大熊猫的食性研究

1975年至1991年我们在凉山山系进行了全面调查和设点观察,由于该山系属大熊猫分布最南端,表现其垂直移动和食物季节交化均有其独特性.根据大熊猫在该山系的变迁和现状,提出了保护对策.     

大熊猫的放归与保护

根据大熊猫在野外的分布格局,对栖息地的选择及种群生存力的分析,应将大熊猫就地保护,使固有的栖息地的种群得以恢复,并提高其生存值和适应度。另一方面,圈养的大熊猫存活率和净生率都大于野外种群,经过一段时间的增殖,保持其野外生态习性,通过驯化,先在大面积范围内散放,然后放归自然,增加野外种群数量和遗传多样性是可行的。     

佛坪保护区大熊猫保护与竹林问题的探讨

佛坪保护区经过几代人的努力,森林生态系统得到了完整的保护,生物多样性逐年提高,大熊猫数量和密度居全国之首,但与大熊猫息息相关的竹林却存在着健康问题和分布不合理问题。希望通过对大熊猫保护与竹林问题的探讨,唤起人们对大熊猫秦岭亚种(秦岭大熊猫)的关注。     

卧龙地区大熊猫的栖息环境及种群分布规律

大熊猫Ailuropoda me Lanoleuca属国家一级保护动物，分布区域狭窄，大多限于我国四川的臣龙，宝兴，平武，南坪等地，本文对大熊猫在卧龙的栖息环境及种群分布规律进行了一些有益的探讨，这对大熊猫的保护提供了一定的理论参考依据。     

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).     

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.     

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.