固-液反应的界面反应模型——瞬间不可逆反应

本文提出固－液反应的新数学模型—界面反应模型．该模型假定反应集中在固液界面上进 行，概念简洁、数学形式简单，并便于动力学区的划分和判别．本文证明该模型在描述瞬间不可 逆反应上达到相当精确的程度，同时发现，液体向浸入其中的旋转圆柱固体表面传质的传质系数 同Ｒｅ存在线性关系，在涉及的Ｒｅ范围ｊＤ因子值几乎不随Ｒｅ改变．     

反应蒸馏塔内催化剂不同装填方式的液固传质效率

采用苯甲酸颗粒-水-空气系统,进行了气液两相逆流状态下的传质实验,获得了规整装填和散堆装填两种不同装填方式对液固传质系数的影响。分析得出在载点以下的操作范围内,气液逆流反应蒸馏塔内液相雷诺数的变化对传质影响较大,气相雷诺数的影响则不明显;并且散堆装填的液固接触效率明显好于规整装填,两者效率之比为1．72倍,并采用液固接触效率关联了传质Sherwood数,得到了如下关联结果：Sh／Sc^1/3=4．65Ф^1.1ReL^0.245。     

固液反应球磨制备Fe-Zn和Fe-Sb系金属间化合物

采用一种固液反应球磨专利技术制备了Fe-Zn和Fe-Sb系列金属间化合物粉末，考察了金属液体中加入与磨球成分相同的金属粉末对反应速度的影响，并分析讨论了该技术制备金属间化合物的机理和特点．     

固液反应球磨制备TiAl,NiAl和FeAl金属间化合物

采用一种固液反应球磨专利技术制备了TiAl，NiAl和FeAl系金属间化合物，所谓固液反应球磨技术是在一定温度区间，球磨介质对金属液体进行球磨时，磨球和金属液体反应生成固态的金属间化合物粉末；为了加速反应进行，也可以在金属液体中加入与磨球成分相同的金属粉末。本研究对固液反应球磨与类似条件下的高能行星球磨(机械合金化)制备金属间化合物的试验结果进行了比较。发现固液反应球磨和普通的高能球磨机械合金化相比，具有更高的的效率，可以加快合金化的速率，能够生成机械合金化不能合成的金属间化合物。最后对固波反应球磨的机理和特点进行了探讨。     

气—液两相瞬变流的流固耦合研究

论述了国内外气-液两相瞬变流流固耦合的研究成果及现状，阐述了气-液两相瞬变流的流动规律和流固耦合研究的各种方法。评述了气-液两相瞬变流、流固耦合等方面的理论模型和数值计算方法，并对不同模型和数值方法进行了比较和分析。指出了目前两相瞬变流流固耦合研究中存在的问题，预测了流固耦合研究的方向应为两相流体瞬态时的流固耦合实验研究和耦合模型的数值计算方法研究。     

脉冲激光诱导液—固界面反应机理研究

研究了脉冲激光诱导液－固界面反应制备亚稳态材料的反应机理,认为在制备亚稳态化合物的过程中存在以下三个反应过程：（Ⅰ）脉冲激光与液－固界面作用产季大量的蒸发物;（Ⅱ）脉冲激光与蒸发物进上步作用产生等离子体;（Ⅲ）等离子体相互作用以及快速淬灭生成亚稳态材料。     

固—液萃取法分离稀土元素时的影响因素

用固-液萃取法研究了稀土元素的萃取分离。讨论了不同的萃取溶剂、萃取剂、电解质以及协萃等对萃取效果的影响,探索了固-液萃取法分离稀土元素的最佳条件。     

金属基复合材料固/液反应制备技术的研究进展

金属基复合材料固/液反应制备技术是最有发展潜力的原位反应合成技术之一,近年来发展迅速.文中对放热弥散复合技术、接触反应涂层制备技术、液相接触反应合成技术、熔体浸渍技术和固/液反应喷射沉积复合技术等几种典型的固/液反应制备技术的研究进展进行了综述,重点总结和分析了放热弥散复合技术、接触反应涂层制备技术和液相接触反应合成技术的研究现状,讨论了各种固/液反应制备技术的工艺特点和存在的问题.     

金刚石产品的脉冲激光制备与应用

详细介绍了用脉冲激光法制备金刚石产品的发展过程 ,并总结了脉冲激光沉积 (PLD)、液体靶脉冲激沉积 (LYPLD)以及脉冲激光诱导液 -固界面反应 (PLIIR)等几种典型的实验方法、实验装置以及所取得的成果 在脉冲激光沉积法 (PLD)制备金刚石薄膜方面重点总结了最近比较新颖的液体靶脉冲激光沉积技术 ,而在金刚石纳米晶的制备方面综述了脉冲激光诱导液 -固界面反应法 ,此法在制备亚稳态纳米晶体方面显示出了较独特的优越性 图 4,参 1 6     

铜／钢液固相复合工艺的实验研究

用液-固相复合法制备铜包钢线，并研究了预热温度、铜液温度和复合时间等工艺参数对铜包钢线的包覆比的影响．结果表明，在接触初期，随着接触时间的增加，铜层厚度和包覆比增加，当热流达到平衡时，包覆比达到最大，最大可达77％，之后包覆比逐渐减小．钢芯线预热温度和铜液温度的升高使包覆比下降，重熔时间缩短．     

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.