亲缘关系对棕色田鼠动情的影响

通过长期观察、试验和研究认为，性成熟的棕色田鼠与双亲或雌亲相处或与兄妹鼠相处都不能发情，从而体现亲缘关系对棕色田鼠发情所具有的明显抑制作用。同母喂养的非同胞异性鼠相处能够动情，说明遗传识别在棕色田鼠亲缘识别中起重要作用。非同母喂养的非同胞异性鼠和同母喂养的异性非同胞鼠中的雄性睾丸下降率显大于异性同胞鼠相处时的雄鼠，说明亲缘关系对雄性睾丸下降表现出明显的抑制作用。     

长耳鸮冬季的捕鼠特点

长耳号鸟越冬期食物的９１．０％为鼠类。所捕食的农田鼠（黑线仓鼠、黑线姬鼠、大仓鼠和棕色田鼠）占５６．８％,居民区鼠类（大家鼠和小家鼠）占３４．２％,体形较小的鼠类（黑线仓鼠、黑线姬鼠、小家鼠和田鼠）占８２．０％,其中田鼠偶尔出现,较大型鼠类（大仓鼠和大家鼠）仅占９．０％;所捕食鼠的年龄多为亚成体（３８．９％）和成体（３９．２％）;所捕食的主要３种鼠（黑线仓鼠、黑线姬鼠和小家鼠）的年龄组成与野外种群的年龄组成一致。１只长耳号鸟平均１ｄ吃１．７９只或５４．３８ｇ鼠。     

棕色田鼠食性食量的研究

用人工室内饲养和野外实地观察的方法，对棕色田鼠的食性食量进行了初步研究．结果表明，棕色田鼠啃食多种农作物和大部分田间杂草，约有 １６ 个科近 ４０ 种．棕色田鼠日食量平均为 ３１８４ ｇ，对某种食物日食量存在着明显的季节变化．日食量与体重呈正相关，且同一年龄组（除幼体组外）的雌性鼠比雄性鼠平均日食指数高     

棕色田鼠食性食量的研究

用人工室内饲养和野地观察的方法，对棕色田鼠的食性食量进行了初步研究。结果表明，棕产啃食多种农作物和大部分田间杂草，约有１６个科近４０种，棕色田鼠日食量平均为３１．８４ｇ，对某种食物日食量存在有显的季节变化，日食量与体重呈正相关，且同一年龄且（除幼体组外）的雌性鼠比雄性鼠平均日食指数高。     

野生成年棕色田鼠社会行为研究

对成年棕色田鼠的社会行为进行了实验室观察。结果发现，当陌生的两只雄鼠相遇时，优势雄鼠和从属雄鼠间的社会行为有明显的区别，优势鼠接近，攻击，追赶对方的频次和持续时间明显的多于从属鼠，而从属鼠逃离和防御行为多于优势鼠；优势鼠的体重明显的大于从属鼠，而且攻击行为和社会探究行为的频次与体重呈正相关，非社会行为无明显的差别。但当两只熟悉的雄鼠相遇时，则比陌生雄鼠相遇表现出较多的喜好行为和较少的攻击行为。观察     

雌性棕色田鼠和昆明小鼠血象对急性低氧应答的比较研究

为探明雌性棕色田鼠在急性低氧处理下血象的变化,确定急性低氧对地下鼠的生理学作用,进而揭示地下鼠的血液系统对急性低氧的应答对策,在4 h急性低氧处理条件下,测定雌性棕色田鼠和昆明小鼠的血象指标并进行比较分析.结果显示,棕色田鼠和昆明小鼠的红细胞压积和红细胞体积在急性低氧处理下表现不同,但红细胞数均不受急性低氧处理的影响;棕色田鼠和昆明小鼠间血红蛋白含量相近且不受急性低氧处理的影响,两种鼠间平均血红蛋白浓度差异极显著,与红细胞体积变小有关;棕色田鼠的血小板数量显著低于昆明小鼠.研究结果表明,两种鼠均通过减小红细胞体积,增加血小板数量的方式应对急性低氧,并且棕色田鼠对低氧的耐受能力强于昆明小鼠.     

野生成年棕色田鼠社会行为研究

对成年棕色田鼠 (Microtusmandarinus)的社会行为进行了实验室观察 .结果发现 ,当陌生的两只雄鼠相遇时 ,优势雄鼠和从属雄鼠间的社会行为有明显的区别 ,优势鼠接近、攻击、追赶对方的频次和持续时间明显的多于从属鼠 ,而从属鼠逃离和防御行为多于优势鼠 ;优势鼠的体重明显的大于从属鼠 ,而且攻击行为和社会探究行为的频次与体重呈正相关 ,非社会行为无明显的差别 .但当两只熟悉的雄鼠相遇时 ,则比陌生雄鼠相遇表现出较多的喜好行为和较少的攻击行为 .观察还发现 ,单独生活的异性个体相遇时表现出较少的攻击行为和较多的喜好行为 ;相反 ,和其它家庭成员生活的两个陌生异性个体相遇时表现出较多的攻击行为 .两个雌性相遇和两个雄性相遇表现出相似的行为模式 .以上结果表明 ,熟悉性、性别、个体大小、接触近况是影响棕色田鼠社会行为的重要因子 .     

棕色田鼠种群空间格局的研究

棕色田鼠种群的空间格局为聚集分布,形成聚集分布的主要原因是繁殖和社群关系及生存环境的异质性．棕色田鼠聚集的基本单位为个体群,一个个体群为一个家族,个体群为聚集分布．不同月份种群的聚集程度不同,表现出高密度、低聚集;低密度、高聚集．亚成体在４,５月份为聚集分布,成体在夏季为聚集分布,成体雌鼠在４,５月份为聚集分布,成体雄鼠５～６月份为聚集分布．引起不同年龄,不同性别在不同月份聚集程度不同的原因是繁殖,１０月份高聚集的主要原因是秋播引起鼠类的迁徙．     

棕色田鼠减数分裂及精细胞染色体数目的研究

以棕色田鼠精母细胞为研究对象，观察减数分裂各时期染色体特征性变化，特别对精细胞染色体构成及数目进行了研究．结果表明，ｘ型和ｙ型精细胞均显示了染色体数目的多态性（２ｎ＝２４，２５，２６），可以认为这是造成棕色田鼠体细胞染色体数目多态性的原因之一．     

智能石墨炉原子吸收光谱法直接测定尿镉

目的建立快速有效的减少尿镉测定中尿基体干扰的预处理方法，改善尿镉原子吸收光谱测定的效果。方法通过比较不同稀释剂、基体改进剂、升温程序及温度对尿镉测定的影响，选择0．25％Mg（NO3）2-0．5％TritonX-100作为样品稀释剂，0．1％Pdcl2-0．125％Mg（N03）2-0．5％TritonX-100-1％HNO3为基体改进剂，采用三步匀速干燥的石墨炉升温程序。该方法灵敏度b=0．21370A（μg/L），检测限为0．0716μg/L，相对偏差为0．8％～1．5％，回收率为98．8％～99．2％，线性范围0～10Ixg／L，样品稳定性〉10天。检测某电池厂镉作业工人60人，同时检测非镉接触的某单位工作人员79人，尿镉测定结果分别为（7．31±4．37）μg/gcr和（1．23±1．11）μg/gcr，两组比较，差异有统计学意义（P〈0．000）。结论该方法尿样可直接稀释测定，简单、快速、灵敏、准确、可靠，可满足大批量检测的要求。     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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