条形码系统在十三陵蓄能电厂运行管理中的运用

为了规范运行巡检工作，保证机组的稳定运行、提高工作效率，十三陵蓄能电厂将条形码技术引入到运行巡检管理中。通过条形码系统的实时数据采集，数据分析，数据共享以及巡检过程的实时跟踪，提高了巡检的质量和效率。该条形码系统是电厂“无人值班（少人值守）”运行管理方式中的一个不可或缺的部分。     

二滩电厂计算机监控系统MIS简介

二滩电厂计算机监控系统是从德国ABB公司引进的一套先进的分布式监控系统，其中MIS系统是二滩电厂现代化管理的重要组成部分。MIS系统生成历史数据库和各种生产报表，并提供电站的实时运行画面，为电站的现代化管理发挥了重要作用，在国内水电站居于领先水平。该文介绍了二滩电厂计算机监控系统MIS的软硬件结构、功能和特点有待进一步完善的问题。     

国产灯泡贯流式机组水电厂设备技术改造与运行管理初探

电厂的生产运行管理工作,尽管每一个电厂都有自己的做法,各有特色,但总的讲,也大多大同小异.我们电厂的运行管理工作亦不例外,从零开始,逐步摸索、总结和提高,结合贯流式机组及电厂的实际,目前已基本形成适合自己的运行管理框架,取得一定运行管理经验.     

刍议五常市龙凤山水库电厂安全管理

龙凤山水库电厂于1969年并网发电,总装机容量3 200 kW,设计年发电量1500万度。水库电厂运行40多年,通过加强水库电厂安全管理,保证发电生产安全,不断提高电厂经济效益和社会效益。安全管理的具体做法包括:树立安全生产观念、定期开展人员培训、加强生产设备管理、加强安全巡视、加强监督检查及改善电厂工作环境等。     

三峡电厂信息化建设设计

三峡电厂从筹建开始就着手信息化的规划建设工作,根据规划,其生产管理业务将分别建立在总公司通用notes网、内部网站和ePMS三级平台上。信息化建设的重点放在ePMS功能设计和软件选择上。已搭建了初期网络,明确了管理网与实时生产监控网的接口,建成了电厂内部网站,通过招标确定了ePMS核心软件(ERP)的供应和实施商,目前软件实施工作已经接近尾声,2003年7—8月ePMS系统投入运行。     

三峡电厂信息化建设设计

三峡电厂从筹建开始就着手信息化的规划建设工作,根据规划,其生产管理业务将分别建立在总公司通用notes网、内部网站和ePMS三级平台上.信息化建设的重点放在ePMS功能设计和软件选择上.已搭建了初期网络,明确了管理网与实时生产监控网的接口,建成了电厂内部网站,通过招标确定了ePMS核心软件(ERP)的供应和实施商,目前软件实施工作已经接近尾声,2003年7-8月ePMS系统投入运行.     

浅谈紫坪铺电厂运行班组安全生产管理

紫坪铺电厂是岷江流域上的一座大型水利枢纽工程,承担着向成都平原供水和向四川电网负荷中心成都供电的重要任务,因此,确保电厂机组的安全稳定运行非常重要,而作为电厂生产第一线的运行班组责任重大,如何搞好运行班组的安全生产,是运行班组管理者需要不断思考和总结的,文章分析了影响运行班组安全生产的几个因素,并提出了加强班组安全生产管理的几点措施,以确保电厂机组设备安全、稳定、经济运行。     

三峡电厂信息化建设设计

三峡电厂从筹建开始就着手信息化的规划建设工作，根据规划，其生产管理业务将分别建立在总公司通用notes网、内部网站和ePMS三级平台上。信息化建设的重点放在ePMS功能设计和软件选择上。已搭建了初期网络，明确了管理网与实时生产监控网的接口，建成了电厂内部网站，通过招标确定了ePMS核心软件(ERP)的供应和实施商，目前软件实施工作已经接近尾声，2005年7—8月ePMS系统投入运行。     

PM2000水电厂生产运行管理系统

在水电厂“无人值班”（少人值守）计算机监控系统中，生产运行管理数据库的建立，Web方式的人机界面，方便运行管理部门进行分析、统计并为电厂其他管理部门提供必要的运行数据和图表，有助于提高电厂的管理水平。     

乌江公司视频监控系统建设及在集中管控中的应用

为了提升远程集中控制和安全集中管控能力,乌江公司采用统一技术标准,于2019年在集控中心建设了一套视频监控系统,整合接入了下辖9座水电站及5个火电厂共2 000多个生产现场的实时视频.系统投入运行后,可以远程对电厂重要生产现场的环境、设备、人员进行实时监视,及时发现不安全因素并加以制止,为“远程集控、少人维护”集控管理...     

地下厂房施工过程的三维非线性数值模拟分析

根据冗各电站地下厂房开挖支护的施工顺序,以隐式杆单元模拟锚杆,以壳单元模拟混凝土喷层,采用三维非线性有限元技术,对洞室群的开挖支护动态过程进行了模拟计算。通过三维非线性有限元计算分析得到:洞室群动态开挖过程中围岩应力变形的分布规律,围岩塑性区的发展规律,锚杆受力变化情况。计算结果表明:整个开挖过程中,洞周围岩位移变化规律正常,量值较小,塑性区主要分布在洞室周边,围岩稳定性较好;但在洞室交叉口处围岩的变形较大,出现较大范围的塑性区,在此基础上提出了支护措施优化方案,并对优化方案的效果进行了评价。     

Evaluation of freshwater mussel relocation as a conservation and management strategy

The relocation of unionacean mussels is commonly used as a conservation and management tool in large rivers and streams. Relocation has been used to recolonize areas where mussel populations have been eliminated by prior pollution events, to remove mussels from construction zones and to re-establish populations of endangered species. More recently, relocation has been used to protect native freshwater mussels from colonization by the exotic zebra mussel Dreissena polymorpha. We conducted a literature review of mussel relocations and evaluated their relative success as a conservation and management strategy. We found that 43% of all relocations were conducted because of construction projects that were forced to comply with the Endangered Species Act 1973 and that only 16% were monitored for five or more consecutive years. Most (43%) relocation projects were conducted from July to September, presumably a period when reproductive stress is relatively low for most species and the metabolic rate is sufficient for reburrowing in the substrate. The mortality of relocated mussels was unreported in 27% of projects; reported mortality varied widely among projects and species and was difficult to assess. The mean mortality of relocated mussels was 49% based on an average recovery rate of 43%. There is little guidance on the methods for relocation or for monitoring the subsequent long-term status of relocated mussels. Based on this evaluation, research is needed to develop criteria for selecting a suitable relocation site and to establish appropriate methods and guidelines for conducting relocation projects.     

基于模型试验的河床砂砾石层基本特性研究

为了经济可靠地确定深厚覆盖层的基本特性参数,以大渡河双江口水电站坝基河床砂砾石层基本特性研究为工程背景,进行大尺寸模型试验,研究河床砂砾石层的旁压模量和动探击数随密度、级配以及上覆压力的变化规律。根据室内模型试验结果,结合现场旁压试验及钻孔试验成果,推断出坝址区河床砂砾石相关层位的密度,并依此进行砂砾石室内力学试验,获得设计所需力学参数。研究成果可为深厚覆盖层基本特性测试提供新的方法。     

Serial discontinuities in a Rocky mountain river. I. Distribution and abundance of plecoptera

Samples were taken year-round at eleven sites along the altitudinal profile (2900-1400 m a.s.l.) of the Gunnison River, a 329 km tributary of the Colorado River, to document the distribution of the Plecoptera and to evaluate responses to hypolimnial-release dams in the headwaters and middle reaches. Twenty-two species were present, with the greatest species richness occurring in an unregulated segment upstream of the middle reach dams; average nymphal biomass over the study period (175 organisms, 395 mg dry mass m^?2) was also greatest in this segment. Only four species (58 organisms, 48 mg m^?2) were present in the tailwaters of the headwater dam and values were greatly reduced (nine species; 35 organisms, 180 mg m^?2) below the middle reach dams. The stonefly community recovered ca. 80 km downstream from the last dam (15 species; 244 organisms, 250 mg m^?2), apparently in response to natural resetting of environmental conditions corresponding to those above the middle reach dams. At the most downstream site (11) only four species (four organisms, 16 mg m^?2) were present. The observed distributional pattern is a classic serial discontinuity in response to hypolimnial stream regulation in a temperate latitude river.     

基于BP神经网络-马尔科夫链模型的隧道围岩位移预测

在隧道工程施工中,围岩位移预测起着很重要的作用。将BP神经网络-马尔科夫链模型引入到隧道围岩位移预测中来,通过对训练样本的学习,利用BP神经网络实现了对位移时间序列的滚动预测,同时得到了实测值与预测值的相对误差;在此基础上利用马尔科夫链对相对误差进行修正,有效地提高了预测结果的精度。并将该模型应用于某公路隧道拱顶下沉位移时序预测中,结果表明该模型具有精度高、科学可靠的特点,为隧道围岩变形的预测提供了新的途径。     

Short communication. Pipelines as a refuge for freshwater snails

In the lower River Murray, Australia, populations of gastropods have declined markedly over the past 40 years. Of the native fauna of about 18 species, only the ancylid Ferrissia petterdi remains common (but in patches), and another five species feature in sporadic local resurgences. Until recently the viviparid Notopala was thought to be extinct. The introduced physid Physa acuta is widespread, but in low numbers. The decline probably is associated with flow regulation, high turbidity and the introduction of common carp. Snail populations have persisted, however, in irrigation pipelines fed from the river, where they periodically cause blockages. This paper reports the discovery of the only known populaion of Notopala hanleyi in a pipeline where the inner wall accumulates microbial and other organic matter, providing high quality food for snails. In the Murray before regulation most of the periphytic biomass was probably microbial, as fluctuating water levels would have maintained littoral communities in a highly productive, early state of succession his postulated that, by stabilizing seasonal water levels, regulation has promoted the production of filamentous green algae, an inferior food source, and so displaced snail populations from the open aquatic environment.     

浙江省水域调查录入系统的设计和应用

浙江省水域调查录入系统将调查数据与电子地图相整合,对分类水域数据进行统计计算,并对输入数据进行合理性和完整性检查,得到调查范围内现有水域的详细数据,实现了水域调查数据输入、计算、统计和查询的数字化管理,提高了工作效率和工作质量,为各地下阶段水域保护规划编制和水域管理工作提供了数据支持。对该系统的设计原则、功能和技术设计等作了介绍。     

基于CT-连续加荷水泥乳化沥青混凝土细观损伤规律研究

利用CT技术对水泥乳化沥青混凝土的细观损伤过程进行实时扫描观测,获得了混凝土试件在连续加荷下的CT图像。通过采用直观分析法、CT数分析法、CT数与损伤变量关系3种方法分析表明,水泥乳化沥青混凝土的破坏过程可分为压密、扩容、裂纹扩展、破坏4个阶段,同时混凝土在受压过程中具有韧性,在极限荷载之前各断面处于压密和微扩容的强化阶段,极限荷载之后混凝土从损伤到破坏发展比较平稳。     

Automated system for removal and pneumatic transport of fly ash from electric precipitator hoppers

A system for removal and pneumatic transport of fly ash is examined, in which air pulses act on batches (pistons) of ash formed in a duct. Studies are made of the effect of several physical parameters on the force required to displace a piston of ash and these serve as a basis for choosing a system for removal and pneumatic transport of ash simultaneously from several hoppers of an electric precipitator. This makes it possible to separate the ash particles according to size without introducing additional components. Formulas are given for calculating the structural and dynamic parameters of this system and measurements of indirect dynamic parameters are used to calculate the input-output characteristics of the system. In order to optimize the system, configurations for summing several ducts into a single transport duct for pneumatic ash transport are proposed. Some variants of dry ash utilization and the advantages of producing of size-separated particles are considered. __________ Translated from élektricheskie Stantsii, No. 2, pp. 26–30 (2008).     

The flood pulse advantage and the restoration of river-floodplain systems

The ‘flood pulse advantage’ is the amount by which fish yield per unit mean water area is increased by a natural, predictable flood pulse. Evidence for this increase is presented from tropical and temperate fisheries. It is argued that increasing multispecies fish yield by restoring the natural hydrological regime is consistent with increasing production of other trophic levels and with restoration from ecological and aesthetic viewpoints. When applied to a river-floodplain system, this restoration would provide a large, self-sustaining potential for recreation, commercial exploitation, and flood control. An interim ‘natural flood pulse’ restoration approach is proposed for systems modified for navigation. This approach approximates the natural hydrological regime in a river reach and is intended as a first step in the long process of restoring the watershed.