A laboratory assessment of the impact of brewery wastewater discharge on sulfide and methane production in a sewer

The impact of brewery wastewater discharge on sulfide and methane production in a sewer was assessed. Experiments were carried out on laboratory scale sewer reactors consisting of both an experimental and a control reactor. The control reactor was intermittently fed with real fresh sewage while the experimental reactor was fed with a mixture of brewery and domestic wastewater at two different proportions (10 and 25% v/v). 10% v/v discharge of brewery wastewater increased the H2S and CH4 production rates in the sewer reactor by 40% and 30%, respectively. When the brewery wastewater fraction was increased to 25% v/v, the H2S production rate of the experimental reactor decreased to the level of the control reactor. In contrast, the CH4 production rate maintained at a level that was 30% higher than that in the control reactor. These results indicate that the discharge of brewery wastewater into sewers can give negative impacts in relation to odour and corrosion management of the systems and will increase the greenhouse gas emissions from sewers. The study also reveals that the impact of trade waste on the biological reactions in sewers is complex, and requires careful experimental assessment in each case.     

基于改进型MF-DFA的月径流序列多重分形分析

应用改进的多重分形消除趋势波动分析法对长江流域某水文站多年月径流资料进行分析计算,结果显示,月径流序列具有长程相关性和多重分形特征,并采用二项倍增串级模型,对其多重分形谱拟合,表明月径流序列具有较强的多重分形性。通过对其初始序列、重排序列和替代序列进行对比分析,揭示出月径流序列多重分形特征是序列本身的长程相关性和胖尾概率分布共同作用的结果,且胖尾概率分布起主要作用。     

有压管道过渡过程的数值计算

基于理想气体状态方程和全新的圆形管道水体积与水深关系数学模型,按照小流量充水原则,结合空气阀的进、排气性质和泄水管的排水特性,对一定的充水流量和不同的放水流量下有压管道充、放水过程中气体压力的变化进行了数值计算。结果表明:在小流量充水的情况下,管内的气体压力不是很高,放水流量越大,对应管段的气体压力越小、管道越危险。     

新疆北部某水电站导流洞进口高边坡塌方处理

某水电站是在建的二等大(2)型工程,导流洞在开工后进口发生了部分塌方及在进口上部发现裂缝,在考虑到对导流洞进口施工期的影响,针对施工期的特点采取治理措施进行处理后,导流洞进口边坡稳定且运行正常.     

多协议网关在PLC通信系统中的应用

采用多协议网关,使车间中的ControlLogix系统成功读写Siemens S7-200中的控制变量,在不影响ControlLogix冗余系统运行的情况下,实现中控室对全厂自动化设备的监控。     

A Reconfiguration Trial on the Platform of Allied Information for Wireless Converged Networks

PAl （platform of allied information） promotes persistent innovation and application of the wireless technologies among different institutes, based on open, safe and controllable network architecture. The platform architecture, unified interface, security mechanism, and reconfiguration are designed to achieve the convergence of various wireless experimental resources. In this paper, the reconfiguration mechanism is designed and a reconfiguration trial is implemented based on the PAI, to verify the ability of integrating experimental resources in the related units.     

Reference-based importance assessment model of identity information

The spread of individuals’ identity information brings about threats of information revealing. Although anonymity could keep individuals’ information from attackers and other unauthorized malicious, at mostly entirely anonymity does not adapt the need of authentication and authorization. To provide the fine-grained ability of privacy preservation, we propose IdRank a reference-based method for rating the importance of identity information objectively and mechanically and provide the implementation of the concrete algorithm. We analyze the result of IdRank and discuss some computing issues of the implementation of IdRank.     

小卫星地面综合测试故障检测系统设计研究

卫星测试知识的有效存储与应用对卫星测试有着重要的意义,利用知识的高级自动化测试是未来测试技术的发展方向;文章基于小卫星综合测试实时数据库提出了一种故障检测系统的软件设计方法,给出了系统的结构,分析了知识的获取过程和知识的推理过程,结合测试应用,详细介绍了故障检测软件的管理维护方法。     

公路施工压力试验机网络监测系统设计与实现

针对目前公路施工领域力学试验过程中数据可靠性低、不便于监测的缺点,设计了压力试验机网络监测系统;在论述了系统的总体结构的基础上,完成了试验数据采集与网络传输系统的软硬件设计、样品条形码信息管理系统设计,以及试验数据与信息查询系统设计;基于文章方法设计的网络监测系统已经在云南某高速公路工地试验室得到应用,实际运行情况表明,系统工作高效稳定,实现了对工地试验室试验过程的远程监督和管理,以及对样品的过程跟踪,可以有效保证工程项目的施工质量。     

一种基于RTLinux 的五自由度开放式并联激光加工数控系统

研究了一种基于RTLinux 的五自由度开放式并联激光加工数控系统,系统中嵌入了三分支五自由度构 型的位置正反解模型,解决了特定位置多解的问题．插补过程应用了S 曲线加减速控制和小线段插补结合的算法． 同时,在数控系统中增加了工艺控制模块,实现了激光功率、离焦量等激光加工工艺参数的调整功能．