大型现浇钢筋混凝土U型渡槽施工技术

禹门口提水工程干渠上的十几座大型钢筋混凝土渡槽采用现浇混凝土施工方案。经过十几座渡槽的施工及通水检验，证明现浇施工技术与工艺已经成熟。本文就施工中遇到的高大排架外形与垂直度控制、槽身模板制做与固定、模具的空中支撑、运输与入仓办法等做以简单介绍。     

圆弧直墙平底量水槽试验研究与示范推广

灌区量水是灌区实现＂总量控制＂和＂定额管理＂的基础性工作.通过圆弧直墙平底量水槽试验研究和示范推广,为我省灌区防洪度汛、抗旱、供水调度、计量收费提供科学依据,改善管理人员测流工作环境,减轻工作人员劳动强度,提高测流精度和测流工作效率,节约管理费用开支,提高灌区的现代化管理水平.     

Comparison under controlled conditions between multi-frequency ADCPs and LISST-SL for investigating suspended sand in rivers

This paper aims to investigate the possibility and limits of using the laser device LISST-SL to calibrate and validate the multi-frequency acoustic method for assessing the concentration and grain size of suspended sand in rivers by using Acoustic Doppler Current Profilers (ADCPs). Over the last few decades, the methods for investigating suspended sediment using Acoustic Backscattering (ABS) have been gaining increasing acceptance for riverine applications. ABS allows indirect quantification of the suspended sediment using non-intrusive measurements with high temporal and spatial resolution from a moving boat, with a range of several metres. Despite the advancement of these techniques, the use of ABS usually implies calibration and validation in the field, which can be performed by comparing echo recording by ADCP to data from water samples. Sampling and analysis of water samples noticeably increase the campaign cost and limits the reliability of the calibration because of the time and spatial averaging involved in physical sampling. In the present work, the LISST-SL suited to river applications was tested to provide matching data in one point for the validation of ADCP methods in future field work. To this end, laboratory tests were conducted utilising two ADCPs working at 1200 and 600 kHz frequencies and studying the same water volume that was concurrently being analysed by the laser device. Rapid injections of sand (median grain size: 130–250 μm) produced average concentrations of 100–1000 mg/L in a 0.25-m/s-fast and 1.7-m-deep flow. Echo records at the two frequencies were compared to the mean grain size and concentration measured via laser diffraction. Although noticeable differences between the acoustic and laser assessments of concentration were due to (1) inappropriate sampling of LISST-SL at low flow velocity and (2) investigation scarce resolution with respect to actual gradients, the corresponding mean sizes were well correlated.     

一种渠式流量测量系统的研究与开发

本文叙述了一种以卡发基槽为一次测量元件的流量测量系统的结构和工作原理。介绍了基于单片机的流量信号处理的工作原理，并给出了电路原理框图及程序流程图。     

抛石基床防波堤底床中孔隙水压力响应的试验研究

利用波浪水槽试验,对波浪作用下沙质底床的孔隙水压力响应进行了研究。试验中观测了不同波况条件下自由底床和有抛石基床防波堤的土体孔隙水压力的变化。结果分析表明,土体孔隙水压力受波高、周期、水深、沙粒径、沙床厚度的影响较大;建堤后,底床中的孔隙水压力会增大,有效应力降低,对防波堤的稳定性造成严重影响。     

大数据平台实时计算监控方案分析

在实时业务数据处理中,需要用到Flume、Kafka、Slipstream等一系列功能组件。在前台业务系统与大数据平台的数据传输过程中,需要监控数据是否正常流动。如果出现了异常,需要定位异常出现的位置。通过一系列的监控工具和方法,可以快速定位各个环节的功能组件是否正常运行。该技术方案的主要目的是为了监控大数据平台实时数据计算的整体流程是否正常工作,前台业务系统与大数据平台内部的数据校验、大数据平台内部的数据校验逻辑是否正确。一方面可以在日常开发过程中验证数据的可靠性,另一方面也可以帮助运维人员更快更精准地定位到产生异常数据的问题所在,从而对现有的业务逻辑进行优化,提高业务效率。     

Sarcastic sentiment detection in tweets streamed in real time: a big data approach

Sarcasm is a type of sentiment where people express their negative feelings using positive or intensified positive words in the text. While speaking, people often use heavy tonal stress and certain gestural clues like rolling of the eyes, hand movement, etc. to reveal sarcastic. In the textual data, these tonal and gestural clues are missing, making sarcasm detection very difficult for an average human. Due to these challenges, researchers show interest in sarcasm detection of social media text, especially in tweets. Rapid growth of tweets in volume and its analysis pose major challenges. In this paper, we proposed a Hadoop based framework that captures real time tweets and processes it with a set of algorithms which identifies sarcastic sentiment effectively. We observe that the elapse time for analyzing and processing under Hadoop based framework significantly outperforms the conventional methods and is more suited for real time streaming tweets.     

基于Prometheus的油田数据泄漏防护大数据系统运维方法

数据泄漏防护系统可以阻止企业的重要数据从网络出口违规外发.针对油田数据泄漏防护大数据平台对各个区域、不同类型的数据采集和设备、业务监测问题,本文首先提出依托大数据Flume(数据采集系统)组件,采用抓取外泄事件日志JSON(一种轻量级的数据交换格式)和解析后的违规外发文件txt文本的方法,实现数据采集;其次依托Prom...     

大风江调水工程渡槽结构设计分析

分析了大风江调水工程渡槽的基础、支撑及槽身结构,论述了输水线路上7座渡槽的结构设计和荷载计算方法.     

氨太克3599聚胺酯防水密封涂料在渡槽伸缩止水缝中的应用

本文针对汾西灌区新建三座钢筋混凝土渡槽伸缩缝处理所采用的氨太克3599（聚胺酯）材料性能、配比、施工工艺、需注意事项、运用效果等方面进行了介绍。