CAN总线在视频监控系统中的应用

主要研究视频图像监控系统中的云台控制器,以CAN总线为数据传输核心,采用P89C51单片机芯片作为下位机的微处理器。PC机通过并口与CAN总线控制器SJA1000进行通信,整个控制器系统中采用Ph ilips公司的SJA1000、82C250芯片和高速光电耦合器6N137。SJA1000是独立的CAN通信控制器,82C250为高性能CAN总线收发器。微处理器负责SJA1000的初始化,设定所要控制的云台转动和镜头变焦转换等相关数据,通过控制SJA1000来实现数据的接收和发送等通信任务。     

基于DMA的数据采集系统

DMA控制器使I／O口和主存储器之间的数据直接进行读写，无需CPU的干预，系统总线由DMAC控制。由于数据不要经过CPU的中转，因此数据传送速度很高。设计基于DMA原理的数据采集系统；5-DMAC的控制下，A／D转换器的蛄果直接存入PC的主存储器；A／D的周期性启动采用定时器输出的方波自动控制，方波的频率可以根据A／D转换器的转换速度设置，提高了整个系统的工作效率。根据同样原理，可以设计出高速的数据采集系统。     

电子探针自动控制系统

该系统用新型微机２８６／３８６／４８６／５８６通过ＲＳ－２３２Ｃ异步串行口向电子探针仪的控制机发送各种控制命令，接收相应的回传数据，实现了对电子探针仪的自动控制；用Ｃ＋＋语言开发了新的电子探针分析软件，对测量和修正计算过程进行了优化，增加了自动排序、打印分析报告等功能，提高电子探针分析速度３倍。     

电子探针自动控制系统

该系统用新型微机２８６／３８６／４８６／５８６通过ＲＳ－２３２Ｃ异步串行口向电子探针仪的控制机发送各种控制命令，接收相应的回传数据，实现了对电子探针仪的自动控制；用Ｃ＋＋语言开发的电子探针分析软件，对测量和修正计算过程进行了优化，增加了自动排序、打印分析报告等功能，提高电子探针分析速度３倍。     

全国主要大中型金铜多金属矿区域地球化学数据库

利用Visual dBase5.5和Visual Basic语言完成了全国主要大中型金铜多金属矿区域地球化学数据库（CRGD1．0）系统的设计和开发，并将所收集到的约30个大中型金，铜，多金属矿田／床的基础地质资料，区域地球化学资料装入库中，形成了全国主要大中型金铜矿多金属矿区域地球化学数据库，同时还开发，设计了数据录入，数据浏览，数据查询，数据输出，格式转换等功能。     

塔里木盆地阿克库勒地区石炭系卡拉沙依组成岩作用

阿克库勒地区卡拉沙依组碎屑岩储层的成分成熟度和结构成熟度均较低．储层的次生溶蚀孔隙所占比例远高了：原生孔隙，次生孔隙是储层的主要储集空间．样品数据统计显示，卡拉沙依组储层属于低孔、低渗储层类型．根据岩石薄片、铸体薄片观察及储层样品的扫描电镜和阴极发光分析结果，本区石炭系储层主要经历的成岩作用有压实（压溶）作用、胶结作用、溶蚀作用和交代作用，其中碳酸盐矿物的沉淀和溶蚀作用是本区卡拉沙依组储层所经历的最重要的成岩作用．成岩作用已达到晚成岩B期，早期方解石交代石英颗粒并发生大量溶蚀，生成大量次生孔隙，晚期方解石没有发生溶蚀．     

PowerBuilder 8.0中C/S模式应用过渡到B/S模式应用的实现技术

简要分析了PowerBuilder 8．0中各种B/S解决方案的优劣，探讨了适用于已有C／S模式应用过渡到B／S模式应用的实现方法，以及利用ASP技术实现对不同类型的客户测览器隐藏底层实现方法的技术，并给出了C／S模式应用过渡到B／S模式应用的一个实例。     

基于CAN总线的远程抄表系统设计

阐述采用SJA1000 CAN总线控制器,设计远程自动抄表系统的结构组成和实现方法。以该方法为基础,设计了CAN总线与单片机之间的通信接口电路、通信协议、数据帧格式,最后基于CAN总线通信的楼宇集中控制器和多用户CAN节点的硬件电路以及软件设计技术。     

多目标生态地球化学调查土壤样品中砷硒锑有效态分析方法的商榷

以0．10mol／L NaH2PO4和0．50mol／L NaHCO3为浸提剂，试验了其对土壤样品中As、Se、Sb的浸提效果；以氢化物发生-原子荧光法(HG-AFS)测定了浸提液中As、Se、Sb的含量。方法在武汉、宁镇测区应用试验表明：采用0．50mol／L的NaHCO3为As、Se、Sb的有效态浸提剂，以HG—AFS法测定其含量的方案可行，检出限分别为：0．006mg／kg、0．001mg／kg、0．002mg／kg。精密度试验，6个标准样品的RSD(n=12)As、Se、Sb均≤10．15％。     

澳大利亚南部Gambier海湾卡洛林CO2气田及有关的CO2产状

虽然ＣＯ２气田在地理上分布很广，但地下高纯ＣＯ２气比较少见。在Ｏｔｗａｙ盆地海湾内部，已经钻遇了两个ＣＯ２气圈闭，其中Ｋａｌａｎｇａｄｏｏ１井产气１４７吨／天（２．８百万立方英尺／天），卡洛林１井产气１４２吨／天（２．７百万立方英尺／天）。澳大利亚的唯一一口生产商业ＣＯ２的井是联盟公司卡洛林１井，年产液态ＣＯ２１５０００吨。处理方法主要限于用单一分馏法处理掉井口气液中含量的１％的烃。Ｋａｌａｎｇａ     

WinNT网中安装PCI网卡无盘工作站

论述了在Windows NT网中安装PCI网卡无盘工作站的方法和步骤。     

小功率智能多频发射系统研究与应用

采用先进的开放式设计理念和模块化设计思想,以多处理器控制技术为基本构架,研制出具有多频同步供电、高精度数字PWM稳流和自动扫频供电等特色技术的智能化电磁发射系统。该系统在矿区应用的效果表明方法技术的有效性。     

一种高效的串行通信协议及实现

提出了一种高效率的数据变换方案,比ＡＳＣＩＩ码变换效率提高４３％,阐述了发送接收数据的过程,给出了软件设计方法,并以此通信协议,实现了ＬＤＳＳ９８调度机维护终端的通信,该软件经过现场长期运行表明,性能稳定。该协议对通信软件的编程有一定的参考价值,有很好的实用性和较广泛的推广价值。     

Methodological Validation for Automated Lineament Extraction by LINE Method in PCI Geomatica and MATLAB based Hough Transformation

Spatial distribution and pattern recognition of geologic lineaments are very effective in hazard risk evaluation. To make the process automated, various algorithms with various data sources were applied. This paper aims to make a review on such algorithms as well as data sources used. Comparative analysis of the LINE algorithm in PCI Geomatica and Hough Transformation in MATLAB has been conducted to explore the procedural accuracy with reference to existing landslides in the Darjeeling Himalayan region. Another comparison was made based on data sources like Landsat-8 OLI and digital elevation model, with reference to the same. As lineament density affects the landslide occurrences predominantly, the output lineament density by these two methods as well as with ground reflection and ground elevation data, were correlated with that of the landslide inventory map. A relational illustration was also done in between the lithological thrust direction and the direction of the individual lineament outputs. Hence, this study provides a decision on the use of a reliable method and data source for the automated lineament extraction which can be considered as generating an output with higher accuracy and, hence, safer for using it in the structural planning and execution of projects on various natural hazard studies.     

Implementing energy efficiency for target setting in the sugar industry of Iran

Sugar plants are one of the most energy-consuming industries in Iran; thus, the implementation of measures to improve energy efficiency seems necessary for such industries. This paper investigated sugar plants’ efficiency in different stages for implementation process of energy efficiency measures focusing on determining some relations for benchmarking and reaching efficient status. In doing so, the process of implementation of energy efficiency improvement measures is planned on the basis of experts’ opinions. Also, for deriving the efficiency of each plant in each of the stages of implementation of measures and the aggregate efficiency of them a multi-stage data envelopment analysis model is formulated. The obtained results from average efficiency indicated that the under evaluation population in the first, second, third, and fifth stages have a good performance and in the fourth-stage managers could not perform successfully. Also, the results of determining some relations for benchmarking showed that to what extent each of the outputs of each stage of the implementation process of energy efficiency measures in the sugar plants should be changed in order to achieve efficient conditions. The distance between the current output and the desirable output indicates to what extent manager has been successful in operation, studies of the rate of change of each of the outputs to achieve the efficient conditions are of the utmost importance in developing suitable strategies.     

地球物理数据的图象化、图象的分页存储及快速显示技术

针对地球物理数据的特点,在标准EGA/VGA及TVGA图形卡上实现了地球物理数据的显示、分页保存及分页的快速显示技术。列出了源程序,对其使用方法进行了说明。     

Twenty years of paleoseismology in Italy

Italy has one of the most complete and historically extensive seismic catalogues in the World due to a unique and uninterrupted flow of written sources that have narrated its seismic history since about the end of the Iron Age. Seismic hazard studies have therefore always been mainly based upon this huge mass of data. Nevertheless, the Italian catalogue probably “lacks” many M ≥ 6.5 events, the seismogenetic structures responsible for which are characterized by recurrence times that are longer than the time span covered by our historical sources. For these reasons, and as in other countries, earthquake data that in Italy have been derived from paleoseismological studies should finally become a necessary ingredient in seismic risk assessment. Indeed, over the past 20 years, some hundred trenches have been excavated, supplying reliable and conclusive data on the recent activities of many faults. Through to many robust datings of surface fault events, these studies have provided the ages of several unknown or poorly known M ≥ 6.5 earthquakes. Here, we summarize the state of the art of paleoseismology in Italy, and present a first catalogue of 56 paleoearthquakes (PCI) that occurred mainly in the past 6 kyr. The PCI integrates the historical/instrumental seismic catalogue, and extends it beyond the recurrence time of the seismogenetic faults (2000 ± 1000 yr). We feel confident that the use of the PCI will enhance future probabilistic seismic hazard assessment, and thus contribute to more reliable seismic risk mitigation programs.     

Landslide susceptibility analysis based on ArcGIS and Artificial Neural Network for a large catchment in Three Gorges region,China

A landslide susceptibility map is very important and necessary to efficiently prevent and mitigate the losses brought by natural hazard for a large area. For the purpose of landslide susceptibility analysis for the whole Xiangxi catchment (3,209 km²), Artificial Neural Network (ANN) analysis was applied as the main method. The whole catchment was divided into two parts: the training area and the implementation area. The backwater area (559 km²) of Xiangxi catchment was used as the training area for the ANN method. In the training area the correlations between the landslide distribution and its causative factors, which includes lithology, slope angle, slope curvature and river network, have been analyzed based on the geological map and digital elevation model (DEM). The back-propagation training algorithm in ANN was selected to train the sample data from the training area, which were composed of input data (causative factors) and target output data (landslide occurrence), in order to find the correlations between them. Based on these correlations and input data in the implementation area (causative factors), the network output data were obtained for the implementation area. In the end, a map of landslide susceptibility, which was established by network output data, was presented for Xiangxi catchment. ArcGIS was applied to extract and quantify input information from a DEM for susceptibility analysis and also to present the result visually. As a result, a landslide susceptibility map, in which 70 % of all landslides are rightly classified in the training area (backwater area), was created for Xiangxi catchment.     

Settler migration during the 1984/85 resettlement programme in Ethiopia

The recent history of resettlement in Ethiopia is briefly reviewed and the caused, flow patterns and some demographic impacts of the 1984/85 government-sponsored resettlement migration are examined with the objective of identifying motivations and constraints in the migration process, analysing changes in population distribution and examining policy implications. Famine was the major push factor in migration, but traditional reactions of peasants to drought and overpopulation caused more drought victims to leave their homes spontaneously for relief and transit centres than as recruits of the government-sponsored resettlement programme. However, motivation to migrate and distances travelled to centres showed strong regional variation, indicating the severity of the famine and traditional adaptive strategies. Changes in rural population density were significant in several awrajas (districts) but were reduced by return migration. Problems associated with this emergency resettlement programme are reflected in difficulties during programme implementation, generally low agricultural production of settlers and high rates of return migration. Further studies are needed on the ecological impact of settler migration in both sending and receiving areas, peasant coping behaviour, as well as the evolution of new settler migration patterns in the new settlement areas in W Ethiopia.     

基于虚拟仪器平台的PID控制系统的设计

以美国国家仪器公司的图形化编程语言LabVIEW为开发平台，结合PID控制工具包，介绍了炉温控制系统的整个设计过程。阐述了炉温控制系统的硬件结构组成，其中包括PCI-1200数据采集卡、PID控制器的设计方法。给出了炉温控制系统的软件设计，主要包括数据采集模块、PID控制输出模块的设计以及炉温控制系统PID参数的整定方法。实践证明，本温度控制系统具有稳定温度时间短，稳定精度高等特点，有较高的实用价值，良好的应用前景。