活性炭纤维的表面功能设计和控制(Ⅱ)

文章系统阐述了活性炭纤维(ACF)表面功能的设计和控制方法,介绍了ACF的比表面积、孔径分布、表面化学结构与吸附对象的关系;从ACF表面物理、化学结构的可设计化入手,全面阐述了ACF物理结构的设计和控制方法及表面化学的改性方法;并介绍了其应用效果。     

活性炭纤维的表面功能设计和控制（Ⅰ）

文章系统阐述了活性炭纤维(ACF)表面功能的设计和控制方法，介绍了ACF的比表面积、孔径分布、表面化学结构与吸附对象的关系；从ACF表面物理、化学结构的可设计化入手，全面阐述了ACF物理结构的设计和控制方法及表面化学的改性方法；并介绍了其应用效果。     

活性炭纤维的表面功能设计和控制（Ⅱ）

章系统阐述了活性炭纤维(ACF)表面功能的设计和控制方法，介绍了ACF的比表面积、孔径分布、表面化学结构与吸附对象的关系；从ACF表面物理、化学结构的可设计化入手，全面阐述了ACF物理结构的设计和控制方法及表面化学的改性方法；并介绍了其应用效果。     

活性炭纤维的应用研究与发展

活性炭纤维（ACF）是由有机纤维先驱体制得的一种理想的高效吸附材料。ACF以其特殊的表面化学结构和物理吸附特性广泛应用于环境保护、电子工业、化工、医疗卫生、等领域。     

表面活性剂对纳米材料形貌及尺寸控制的影响

样品形貌和粒径大小是影响材料物理及化学性能的两大因素,表面活性剂在实现功能材料的尺寸设计及形貌控制中起着重要作用。本文依据表面活性剂的特殊结构,综述了表面活性剂疏水基和亲水基对合成纳米材料形貌结构的影响,同时介绍了表面活性剂的浓度及种类对纳米材料尺寸带来的影响。     

表面活性剂对纳米材料形貌及尺寸控制的影响

样品形貌和粒径大小是影响材料物理及化学性能的两大因素，表面活性剂在实现功能材料的尺寸设计及形貌控制中起着重要作用。本文依据表面活性剂的特殊结构，综述了表面活性剂疏水基和亲水基对合成纳米材料形貌结构的影响，同时介绍了表面活性剂的浓度及种类对纳米材料尺寸带来的影响。     

脱硫活性碳纤维改性及再生技术研究进展

工业脱硫成本较高、脱硫剂难再生和脱硫产物难利用,采用吸附性能和再生性能优越的活性炭 纤维作为脱硫剂极具前景。 首先阐述了活性碳纤维吸附—氧化—水合整个脱硫过程,分析了表面官能团对 ACF 吸附催化效率的影响。 总结出在吸附和氧化前,基于碱性含氧官能团及含氮官能团的调控对 ACF 进行 改性可显著提升其脱硫率。 而水合生成硫酸后,对 ACF 再生可将孔内污染物洗脱或分解,还原活性位,实现 循环脱硫。 然后对活性碳纤维改性及再生方法进行归纳:改性方法主要基于 ACF 物理结构和表面官能团种 类、数量的调整,瓶颈在于难以分离孔隙和官能团的耦合影响;再生方法主要靠外部供能,使吸附质分子和产 物脱附或直接分解,但碳损耗大、能耗高、产物利用率低。 最后对未来脱硫活性碳纤维改性及再生技术研究 方向提出建议,以供制备高性能脱硫剂参考。     

TiO_2/ACF复合光催化去除水中有机污染物研究进展

论述了二氧化钛(TiO2)在活性碳纤维(ACF)上的负载方式,总结了TiO2/ACF复合光催化剂的表面形态特征和结构特点,介绍了TiO2/ACF复合光催化剂光催化氧化水中有机物吸附、富集、光催化、原位再生的过程.活性碳纤维可富集目标物、捕获中间产物,还可抑制中间有害产物的生成及热处理过程中TiO2的相变.讨论了目标物、负载方法、负载量等因素对有机物氧化速率的影响.TiO2、ACF的复合将对光催化剂的应用技术产生积极影响,指出了研究中应该解决的问题.     

活性炭纤维脱除SO2/NOx/Hg中传递过程的影响

为解决活性炭纤维(ACF)同时低温吸附氧化脱除SO2/NOx/Hg时传递过程对脱除率的影响问题,通过实验和数学模型相结合的方法,研究了传递过程对脱除污染物宏观反应速率的影响,并将ACF与颗粒活性炭(GAC)的传递过程影响进行了比较.认为温度的影响对于ACF和GAC都可以忽略;当ACF表面流速大于0.113 m/s,GAC表面流速大于0.2 m/s时,外扩散的影响可以忽略;ACF内扩散的影响可以不考虑,而GAC不能忽略.     

多官能团活性炭纤维与O_3双向协同脱除SO_2的实验研究

采用溶胶-凝胶法,将脱硫多官能团薄膜负载在聚丙烯腈基活性炭纤维(ACF)上,并进行持续动态吸附和百次再生.通过实验研究分析,脱硫多官能团是以薄膜形式均匀包覆在ACF的纤维表面,脱硫多官能团薄膜封堵ACF纤维表面的部分孔洞,造成样品负载脱硫官能团ACF的比表面积、孔容和饱和吸附量都要略小于ACF,但对于硫化物的指向性和吸附量反而增大;百次反洗再生后,包覆在ACF纤维上的脱硫官能团薄膜会有一定程度的开裂翘起,使原本被封堵的孔隙结构重新露出,提高了样品比表面积、孔容和饱和吸附量.经过预膜剂原位再生后,包覆在ACF纤维上的脱硫官能团薄膜被重新修补如初.在臭氧的作用下,除了能够转化硫化物的吸附形态,还会对载体ACF产生再生自洁作用,使ACF吸附作用的时间大大延长.     

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.