兰州市冬半年大气污染物分布特征及变化规律

本文利用１９８８年至１９９２年兰州市１０月至下年度３月期间的较为详尽的污染资料，进行了统计平均，通过图的形式，总结了兰州市冬半年大气污染物分布特征及变化规律，并就这种特征和规律进行了分析，一年之中，ＳＯ２、ＣＯ、ＮＯｘ浓度最大值出现在１２月，而Ｏ３浓度则在此月最低。之内，ＣＯ、ＮＯｘ出现两次峰值，ＳＯ２最大值出现于午后，Ｏ３则较为复杂与ＮＯｘ牵扯相连，峰谷相映．ＳＯ２、ＣＯ、ＮＯｘ３种污染物的浓度城关区大于西固区，而Ｏ３则相反。     

脉冲电晕放电脱硝中N_2O生成的研究

脉冲电晕放电是一种能同时脱除烟气中ＳＯ２，ＮＯｘ和飞灰颗粒的新方法。然而在一个电晕放电试验装置上的试验首次发现，在脱除ＮＯｘ的同时产生了一定量的Ｎ＿Ｏ，而且随着电压和停留时间及ＮＯｘ初始浓度的增大，Ｎ＿２Ｏ量也增大。试验还发现，电晕放电对Ｎ＿２Ｏ无分解作用，空气中的氮气在电晕中不生成Ｎ２Ｏ，脱硫及喷氮脱硫不生成Ｎ２Ｏ，ＳＯ２和ＮＨ３对Ｎ＿２Ｏ的生成无影响。讨论了脉冲电晕放电脱硝中Ｎ２Ｏ生成的机理。     

脉冲电晕放电脱硝中N2O生成的研究

脉冲电晕放电是一种能同时脱除烟气中ＳＯ２，ＮＯｘ和飞灰颗粒的新方法，然而在一个电晕放电试验装置上的试验首次发现，在脱除ＮＯｘ的同时产生了一定量的Ｎ２Ｏ，而且随着电压和停留时间及ＮＯｘ初始浓度的增大，Ｎ２Ｏ量也增大。试验还发现，电晕放电对Ｎ２Ｏ无分解作用，空气中的氮气在电晕中不生成Ｎ２Ｏ，脱硫及喷氨脱硫不生成Ｎ２Ｏ，ＳＯ２和ＮＨ３对Ｎ２Ｏ的生成元影响。讨论了脉冲电晕放电脱硝中Ｎ２Ｏ生成的机理。     

关于群的计数的几个渐近公式

令Ｃ（ｘ），Ａ（ｘ），Ｎ（ｘ）分别表示阶ｎ≤ｘ且任一ｎ阶群都是循环群，Ａｂｅｌ群，幂零群的自然数ｎ的个数，本文证明了：Ｃ（ｘ）＝ｅ＾－ｒ／ｌｏｇ３ｘ＋Ｏ（ｘｌｏｇ４ｘ／ｌｏｇ＾２３ｘ），Ａ（ｘ）＝ｅ＾－ｒｘ／ｌｏｇ３ｘ＋Ｏ（ｘｌｏｇ４ｘ／ｌｏｇ＾２３ｘ），Ｎ（ｘ）＝ｅ＾－ｒ／ｌｏｇ３ｘ＋Ｏ（ｘｌｏｇ４ｘ／ｌｏｇ＾２３ｘ），Ｎ（ｘ）－Ａ（ｘ）＝ｅ＾－ｒｘ／ｌｏｇ＾２３ｘｌｏｇ＾２３ｘ＋Ｏ（ｘｌｏｇ＾     

C_(60)硝基化合物的合成与性质

在惰性介质ＣＣｌ４溶剂中，将Ｃ６０分别与浓ＨＮＯ３及ＮＯ２反应制备Ｃ６０硝基化合物，并通过红外光谱、紫外光谱、元素分析等方法确定了Ｃ６０硝基化合物的结构为Ｃ６０（ＮＯ２）ｘ（ＯＨ）ｙ·其中，Ｃ６０与ＨＮＯ３反应合成时，ｘ为２～３，ｙ为１２～１４；与ＮＯ２反应合成时，ｘ为３～５，ｙ为１２～１６·     

石油焦燃烧过程中NO_x和SO_2析出规律的研究

在卧式加热炉和富氧条件下,对石油焦在燃烧过程中的ＮＯｘ 和ＳＯ２ 析出规律进行研究,发现石油焦的ＮＯｘ 和ＳＯ２ 析出受多种因素的影响：温度增加,ＮＯｘ 的析出量增加;颗粒粒径增加,ＮＯｘ 和ＳＯ２ 的析出量减少;石灰石微量增加,ＮＯｘ 的浓度降低,石灰石过量增加,ＮＯｘ 的浓度反而升高,石灰石的增加使ＳＯ２ 降低;ＮＯｘ 的析出并不与Ｎ 的质量分数成正比,ＳＯ２ 的析出与Ｓ的质量分数成正比．结合这些实验现象,从机理上对它们进行解析．     

流化床煤燃烧N_2O，SO_x及NO_x的消减

在一台循环流化床实验台上，研究了石灰石脱硫过程中Ｎ_２Ｏ／ＳＯ_ｘ／ＮＯ_ｘ浓度的变化，并在空床上进行了再燃烧法脱除Ｎ２Ｏ的实验，结果表明，石灰石脱硫会使ＮＯｘ少量增加，再燃烧法可以在不增加ＮＯｘ的同时使Ｎ_２Ｏ大大降低；再燃燃料的挥发分含量越高，Ｎ２Ｏ的消减率越高；气体停留时间越长，Ｎ２Ｏ的分解率越高；低氧量对再燃烧法消减Ｎ２Ｏ有利     

14种二茂铁亚胺类化合物的制备和紫外－可见光谱研究

报道了９种取代苯胺基亚胺二茂铁类化合物Ｒ－Ｎ＝ＣＨＦｃ［Ｒ为＿６Ｈ＿（５＿ａ＿ｘ＿ａ（ｘ＝Ｈ，４　Ｂｒ，４ＳＯ＿３Ｈ，４ＯＣＨ＿３，２，４（ＮＯ＿２）＿２）和２，４（ＮＯ＿２）＿２Ｃ＿６Ｈ＿４ＮＨ］及５种取代苯亚甲基亚胺二茂铁类化合物ｘ＿ｎ（２ＯＨ）Ｃ＿６Ｈ＿（４－ｎ）。ＣＨ＝Ｎ—Ｆｃ［ｘ＝Ｈ，５－Ｂｒ，５－ＮＯ＿２，５ＮＯ：５Ｂｒ３，５（ＮＯ＿２）＿２］的制备，测定了它们的紫外光谱，指定了谱带的归属，并对谱带的位移从理论上予以解释。     

流化床煤燃烧N2O,SOx及NOx的消减

在一台循环流化床实验台，研究了石灰石脱硫过程中Ｎ２Ｏ／ＳＯｘ／ＮＯｘ浓度的变化，并在空床上进行了再煤燃烧脱除Ｎ２Ｏ的实验，结果表明，石灰石脱硫全吏ＮＯｘ少量增加，再燃烧法可以在不增加ＮＯｘ的同时使Ｎ２Ｏ大大降低，再燃燃料的挥发含量越高，Ｎ２Ｏ的消减率越高；气体停留时间越长，Ｎ２Ｏ的分解率越高；低氧量对现燃烧法消减Ｎ２Ｏ有利。     

石油焦燃烧过程中NOx和SO2析出规律的研究

在卧式加热炉和富氧条件下,对石油焦在燃烧过程中的ＮＯｘ和ＳＯ２析出规律进行研究,发现石油焦的ＮＯｘ和ＳＯ２析出受多种因素的影响,温度增加,ＮＯｘ的析出量增加,颗粒粒径增加,ＮＯｘ和ＳＯ２的析出量减少;石灰石微量增加,ＮＯｘ的浓度降低,石灰过量增加,ＮＯｘ的浓度反而升高,石灰石的增另使唤降低;ＮＯｘ的析出并不与Ｎ的质量分数成正比,ＳＯ２的析出与ＳＤ的质量分数成正比,结合这些实验现象,从机理上对它们进     

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.