太阳能高压气体放电灯智能控制系统

为了提高太阳能高压气体放电灯照明效率,延长照明时间,实现智能充放电控制、智能照明控制,提出一种新型太阳能高压气体放电灯照明控制系统。系统充电控制策略实现了最大功率点跟踪技术和蓄电池三段式精确充电,照明控制策略采用变开关频率控制和恒功率控制。硬件结构采用单级式逆变结构,减少了硬件成本开销,提高了能量转化率。实验结果表明:该系统延长了蓄电池寿命及点灯时间,提高了电灯效率,效率达90%以上,使得太阳能高压钠灯照明系统智能、高效、稳定的运行。     

基于单片机太阳能路灯模型的设计

利用STC12C5410AD单片杌作为控制电路的核心,设计一款太阳能照明系统智能控制器,实现了对蓄电池的快充、浮充、停充等充、放电管理策略。根据环境光照强度不同进行了照明系统的智能开关电路设计,实现了系统的无人控制。编制了软件程序,进行了样机设计及制作,实验结果验证了硬件电路和程序设计的正确性及方案的可行性。     

基于PIC微控制器的光伏照明系统

本论文主要阐述了基于PIC微控制器,实现基于单片机的太阳能光伏照明系统的总体方案和主要技术。论文重点分析了控制器的低功耗关键技术和低成本实现方案,并就对蓄电池充电和负载亮度调整问题进行了分析;在硬件设计的基础上,论文对软件控制的设计要点和软件运行流程进行了分析。     

太阳能家用照明装置单片机自动控制器

为了缩短充电时间,提高充电效率,太阳能家用照明装置自动控制器能在充电过程中实时跟综蓄电池充电电压、电流、温度和太阳能蓄电池的电压,通过单片机硬件软件资源动态调整蓄电池充电电压、电流和控制用户照明装置,使蓄电池充电效率达到最佳效果,太阳能利用率达到最高。     

太阳能照明系统优化设计

针对目前市场上的太阳能路灯控制器,存在可靠性不高、利用率不高、性价比不高的现状,本文基于单片机控制搭建的太阳能照明系统,从太阳能最大功率跟踪,蓄电池的充电控制,路灯驱动调光等方面进行了研究和改进,同时为了达到高的照明效率,本文使用了具有小体积、长寿命以及低能量消耗的大功率白光LED灯,并根据照明的需求以及蓄电池存储的能量多少,采取分段控制LED灯的照明亮度,进一步达到节能效果。     

基于太阳能LED照明系统的研究

由于能源紧张问题日趋严重,近年来太阳能光伏发电和LED开始引起了人们的关注.文章介绍了将两者结合应用于太阳能LED照明系统,着重分析该系统中的DC-DC转换器、蓄电池、MCU控制器等各个组成部分的配置原则,使得系统能简单可靠地实现智能控制,进而提出一种新颖的充电控制方法.     

水泥工艺篦冷机的仿人智能控制器设计

针对篦冷机滞后性强、系统非线性、无法直接观测料层厚度等工艺难点,提出运用仿人控制的思想,采取多点观测和优先控制的策略,设计包括变积分的PI控制器、Bang Bang控制器、偏差校正控制器以及趋势异常校正控制器在内的仿人智能控制器。将该控制器应用于实际水泥生产线上,运行结果表明,仿人智能控制器在运行中不仅节省人工投入实现了自动控制,而且将篦冷机的风室风压、油压以及风机电流控制在一定范围内,使工况更加稳定。     

LED太阳能路灯控制器的设计

根据LED太阳能路灯系统特点,设计了太阳能路灯控制器.详细说明了蓄电池充电控翻及负载输出控制的硬件设计原理,并采用三段式充电理论实现了控制器的软件设计.控制器功能易于实现,满足控制和环保节能的要求.     

基于嵌入式太阳能LED照明驱动系统设计与实现

从高效利用绿色能源的角度出发,设计了一款新型的基于嵌入式技术的太阳能LED照明驱动系统.系统采用太阳能电池发电并对其进行实时检测,利用PWM对升降压DC/DC转换器进行控制以实现最大功率点跟踪充电控制和蓄电池的智能管理,利用LED照明以提高能源利用率.系统工作可靠性,具有实用性及环保性.     

基于ATMEGA16的铅酸蓄电池充放电控制器的设计

为了保护离网型太阳能系统中的铅酸蓄电池,实际设计了基于ATMEGA16单片机为控制芯片的太阳能铅酸蓄电池充放电控制器.该控制器的设计主要包括主电路拓扑结构的选择,蓄电池充放电控制策略的研究.在此基础上设计了基于C语言的控制程序,并且对各部分电路进行了测试,得到的实际测试充放电数据与理论分析的一致.     

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.