秦美猕猴桃的室温贮藏

采用ＰＥ袋和保鲜剂方法对室温下贮藏秦美猕猴桃进行了研究．结果表明，袋内Ｏ２体积分数为１０％以上，ＣＯ２体积分数在２．５％～６％范围情况下，果实呼吸峰的出现推迟，峰值降低，果实贮藏期显著延长．袋内ＣＯ２体积分数高于６％，Ｏ２体积分数低于１０％时，则产生伤害．ＣＯ２体积分数低于２．５％时，贮藏期缩短．适合的ＰＥ－３袋加保鲜剂室温贮藏三个月，其猕猴桃果实硬度可保持在４．１０ｋｇ／ｃｍ２，好果率达９６．４％．     

低乙烯气调贮藏对“秦美”猕猴桃的品质和货贺期的影响

“秦美”猕猴桃含可溶性固形物达到６．２－６．５％时进行采收。在０±０．５℃,Ｏ２Ｏ－３％,ＣＯ２３－５％,相对湿度〉９０％,乙烯浓度〈０．０１ｐｐｍ环境中贮藏６个月。结果表明,果实硬度５．５２ｋｇ／０．５ｃｍ＾２,可溶性固形物含量１２－１４％;果实新鲜饱满、风味正常,具有猕猴桃的固有特性,货架期１５－２０天。     

低乙烯气调贮藏对“秦美”猕猴桃的品质和货架期的影响

“秦美”猕猴桃含可溶性固形物达到６．２－６．５％时进行采收。在０±０．５℃,Ｏ２２－３％,ＣＯ２３－５％,相对湿度＞９０％,乙烯浓度＜０．０１ｐｐｍ环境中贮藏６个月。结果表明,果实硬度５．５２ｋｇ／０．５ｃｍ２,可溶性固形物含量１２－１４％;果实新鲜饱满、风味正常,具有猕猴桃的固有特性,货架期１５－２０天。     

含重金属氧化物高密度玻璃的制备和荧光性能

考察了ＰｂＯ－Ｂｉ＿２Ｏ＿３－Ｂ＿２Ｏ＿３系统玻璃的制备、组成与密度的关系及其荧光性能。研究表明，当Ｂ＿２Ｏ＿３引入量的摩尔分数为５％～６０％时，可获得密度值为５～８ｇ／ｃｍ￣３的玻璃，玻璃的密度随Ｂ＿２Ｏ＿３引入量的增加而减少，发射光谱证实，ＰｂＯ－Ｂｉ＿２Ｏ＿３－Ｂ＿２Ｏ＿３玻璃能在可见光区发射荧光，发光原因是玻璃中含有Ｐｂ￣（２＋），Ｂｉ￣（３＋）发光离子，其荧光波长与玻璃组成、结构及激发波长大小有关。     

〔Eu(NTO)_3(H_2O)_5〕5H_2O的合成和晶体结构

用３－硝基－１，２，４－三唑－５－酮（ＮＴＯ）的锂盐水溶液与Ｅｕ２Ｏ３的稀硝酸溶液反应，合成了ＮＴＯ的铕配合物，其单晶结构用Ｘ射线分析法进行了测定，确定了它的结构式为〔Ｅｕ（ＮＴＯ）３（Ｈ２Ｏ）５〕５Ｈ２Ｏ。其晶体属单斜晶系，空间群为Ｐ２１／ｎ，最终偏离因子Ｒ为０．０２３。晶胞参数如下：ａ１．８７２０（２）ｎｍ，ｂ０．６５４８（３），ｃ１．９３２３（３）ｎｍ，β９５．３３（１）°，Ｖ２．３５８３（５）ｎｍ３，Ｚ４，Ｄｃ２．０２６ｇｃｍ－３，μ２７．６７８ｃｍ－１，Ｆ（０００）１４３２。铕离子的配位数为８，其配位多面体为畸变的十二面体     

ACC氧化酶的测定方法

利用番木瓜ＣａｒｉｃａＰａｐａｙａＬ．果实为材料，研究了１－氨基环丙烷－１－羧酸（ＡＣＣ）氧化酶的体内和体外测定方法．在ＡＣＣ氧化酶的体外分析中，甘油体积分数为１０％～３０％时能稳定酶的活性；φ（ＣＯ２）为０．３％～２０％（反应体系气相中）和０．５～１２ｍｍｏｌ／ＬＡＣＣ提高酶的活性；较适宜的ｐＨ值为７．２．     

绿色巴夫藻的培养生态条件试验

对绿色巴夫藻ｐａｖｌａｖａｖｉｒｉｄｉｓ进行了生态条件试验，认为该藻能适应光强５００－２５００Ｌｕｘ；适温范围５－３３℃，最适２０－２６℃；密度１．００５－１．０４０ｇ／ｃｍ３，最适１．００５ｇ／ｃｍ３；ｐＨ５－９都可以满足其正常生长，通过单因子和正交试验表明：培养液的较佳配方是在天然海水中加入（ＮＨ２）２ＣＯ－Ｎ２０ｍｇ／ｄｍ３，ＫＨ２ＰＯ４－ｐ１ｍｇ／ｄｍ３，ＦｅＳＯ４－Ｆｅ０．２ｍｇ／ｄｍ３，维生素Ｂ１１ｍｇ／ｄｍ３和维生素Ｂ１２０．００５ｍｇ／ｄｍ３。     

非离子型微乳液对铜─二甲酚橙分光光度分析的增敏作用

以含水量为９４．１％的非离子型乳化剂ＯＰ／ｎ－Ｃ５Ｈ１１ＯＨ／ｎ－Ｃ９Ｈ２０／Ｈ２Ｏ微乳液为介质，进行了Ｃｕ（１１）－二甲酚橙ＯＸ分光光度法研究（ε＝３．６×１０４Ｌ·ｍｏｌ－１·ｃｍ－１），与以水为介质（ε＝５．２×１０３Ｌ·ｍｏｌ－１·ｃｍ－１）及相同含水量的乳化剂ＯＰ胶束介质（ε＝１．１４×１０４Ｌ·ｍｏｌ－１·ｃｍ－１）相比较，测定灵敏度显著增加，样品分析结果令人满意。     

非晶与单晶硅电解掺氢的研究

用电解方法在非晶硅中掺入了原子氢，使非晶硅中悬挂键的ＥＳＲ信号明显下降，相应悬键密度由２．５×１０￣（１８）ｃｍ￣（－３）下降为８×１０￣（１７）ｃｍ￣（－３）．并发现以Ｈ＿３ＰＯ＿４为电解液时，对作为阴极的非晶硅和Ｐ型单晶硅均有轻度的腐蚀作用，在Ｈ＿２ＳＯ＿４中电解，温度高达２２０℃，对硅也无腐蚀作用．     

在混合溶剂中碳酸解离热力学研究Ⅲ：碳酸钠＋碳酸氢钠＋氯化…

在Ｘ＝５质量％的尿素－水混合物中，在２７８．１５－３１８．１５Ｋ温度范围内，利用电池：Ｐｔ，Ｈ２（１０１．３２５ｋＰａ）｜Ｎａ２ＣＯ３（ｍ１），ＮａＨＣＯ３（ｍ２），ＮａＣｌ（ｍ３），５质量％尿素－水｜ＡｇＣｌ－Ａｇ的准确电动势数据，确定了在５％的尿素－水混合物中碳酸二级解离常数Ｋ２。     

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