粉煤灰水泥麻屑板工艺

分析了粉为灰水泥麻屑板六个主要工艺因素（亚麻屑与粉煤灰水泥的比率、水分与粉煤灰水泥的比率、水玻璃用量、ＣａＣｌ２用量、粉煤灰在水泥中的掺加量和板子密度）与板子性能之间的关系。结果表明：只要采用合适的工艺条件，用粉煤灰和水泥，以及亚麻屑作原料生产粉煤灰水泥麻屑板是可行的。     

利用废旧塑料与粉煤灰制造建筑模板的研究

利用废旧塑料（聚乙烯、聚苯乙烯、聚丙烯）与粉煤灰共混,采用热压成型的工艺制造塑料建筑模板,对模板不同配方条件下模板样品的断面形貌、密度、吸水率、冷热稳定性、冲击强度进行了研究。结果表明：随着粉煤灰用量的增大粉煤灰与废旧塑料之间的相容性变差,模板的密度与吸水率随着粉煤灰用量的增加而增大,模板的热膨胀率与冷收缩率随着粉煤灰用量的增加而减小。模板的冲击强度随着粉煤灰用量的增加而减小。     

苹果木高密度刨花板热压工艺的研究

大量苹果木被遗弃,造成资源浪费。为了解决这个问题,采用正交试验对苹果木高密度刨花板制造关键工艺参数进行研究。结果表明：（1）刨花初含水率对刨花板的理化性能不显著;施胶量对刨花板内结合强度、含水率影响显著,而对刨花板静曲强度和2h吸水厚度膨胀率影响不显著;热压时间对刨花板2h吸水厚度膨胀率影响显著,而对其它性能影响不显著。（2）苹果木高密度刨花板较优的工艺参数为：刨花含水率为6%、施胶量为13%、热压时间为300s。     

大豆蛋白胶枫木刨花板热压工艺研究

为了解决甲醛等有害物质的释放问题,使用大豆蛋白胶作为热压枫木刨花板的无甲醛胶粘剂,研究了刨花板的热压工艺.在实验室条件下,通过单因素试验分别分析了热压温度、热压时间、施胶量和密度对枫木刨花板内结合强度及表面结合强度的影响;并通过响应面设计得出最佳试验参数.结果表明,大豆蛋白胶可以用于枫木刨花板的制造,其最佳工艺参数为:热压温度180℃,热压时间27.5min,施胶量15.7%,密度780kg/m3.在此条件下,压制的板材性能均达到GB/T4897.1-2003对在干燥状态下使用的普通用板要求.     

矿物掺合料对水泥砂浆干缩性能影响的研究

在保持砂浆中单位体积用水量和骨料用量相同的情况下，分别研究粉煤灰（细度为720m^2／kg）、矿渣粉（细度368m^2／kg）、硅粉（细度为16200m^2／kg）等体积取代水泥对砂浆干缩性能影响的规律．结果表明：用粉煤灰取代水泥使砂浆干缩率下降，且取代量变化对干缩的影响不大；用矿渣取代水泥使砂浆干缩率略有增加，且取代量变化对干缩影响不大；用硅灰取代水泥使得砂浆干缩率增加，而且随着取代量增加，干缩率增加。     

含粉煤灰或矿渣与硅灰的不同组合的混凝土(英文)

本研究评价了在高性能混凝土中掺加粉煤灰－硅灰或磨细矿渣－硅灰的不同组合时的抗压强度、劈拉强度和氯离子渗透性。在水胶比０．２８～０．３３、总胶凝材料用量５００～５５０ｋｇ／ｍ３下，采用这两种矿物掺和料组合替代３０％～５０％的硅酸盐水泥时，混凝土２８ｄ抗压强度大多为８５～１００ＭＰａ，２８ｄ劈拉强度大多为５．５～６．５ＭＰａ，并具有高工作性和很低的氯离子渗透性；混凝土的早期强度发展快，而且后期强度持续增长。含粉煤灰－硅灰或矿渣－硅灰的不同组合的混凝土的劈拉强度与抗压强度的比值为０．０６３～０．０６６。不存在一个对于抗压强度和劈拉强度都是最佳的掺和料组合。     

大掺量粉煤灰注浆充填材料试验研究

为了解大掺量粉煤灰的水泥粉煤灰注浆材料的物理力学性能，通过室内试验，探讨了在大掺量粉煤灰情况下，不同水灰质量比，固相质量比及不同外加剂用量与硬化体抗压强度，浆体凝结时间，流动度、粘度、结石率之间的相互关系，试验表明，随粉煤灰掺量的增加，硬化体抗压强度、浆体流动度降低，而凝结时间延长，结石率和粘度增大；硬化体早期强度较低，后期强度有较大增长（120d后仍有所增长）；适量水玻璃的掺入（水玻璃占水泥质量分数不大于3％）使凝结时间缩短，结石率增大，但导致硬化体抗压强度降低，浆体流动性变差；浆体凝结时间较长，水灰质量比（0．7－1．0）：1．0，粉煤灰掺量质量分数为60％－90％时，初凝一般大于12h，终凝一般大于20h。     

不同硬化水泥浆体中氯离子扩散和孔溶液的研究(英文)

分别采用扩散电池法（ＤＣＭ）和孔溶液挤出法（ＰＳＣＭ）研究了不同类型的硬化水泥浆体中Ｃｌ－的扩散量以及ＯＨ－、Ｃｌ－的浓度。根据由Ｃｌ－扩散量和（Ｃｌ－／ＯＨ－）比值得到的有效扩散系数Ｄｅ，研究讨论了大水泥中掺入矿渣和各种粉煤灰对扩散量和孔溶液组成的影响。     

聚苯乙烯球与大掺量粉煤灰水泥基复合制备轻质多孔墙板的研究

现采用高性能粉煤灰活性激发剂技术，研制成了粉煤灰掺量达７０％的粉煤灰－水泥－矿渣－石膏系统的新型复合水泥基材。采用了表现密度３５ｋｇ／ｍ＾３的发泡聚苯乙烯球为轻集料，在成型工艺上采用表面活性剂和裹浆加压成型技术，解决了界面粘结不好和物料分层现象。从而研制了大掺量粉煤灰聚苯乙烯球复合新型轻质多孔墙板。该墙体材料容重仅为５７５ｋｇ／ｍ＾３，并具有良好的保温，隔热性能，各项性能指标达到，超过了有关标准要     

GH矿粉对粉煤灰混凝土的增强效果

通过成型胶砂试件和混凝土试件，对提高大掺量粉煤灰高性能混凝土早期强度的方法进行了试验研究．试验所用的GH矿粉是以炼铁厂的工业炉尘为基料、配以若干种具有互补性能的化工原料经特殊处理复合而成的混凝土掺和料，GH矿粉和粉煤灰的用量分别为胶凝材料总量的10％～15％和20％～60％．研究结果表明，用GH矿粉和Ⅱ级粉煤灰复合作为掺和料，可显提高大掺量粉煤灰混凝土的强度，尤其是早期强度，其增强效果甚至优于硅灰．用240kg／m^3 42．5级普通硅酸盐水泥、240kg／m^3 Ⅱ级粉煤灰和60kg／m^3 GH掺和料，配制出了28d强度为106MPa的高性能粉煤灰混凝土，并使混凝土成本显降低．     

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.