基于负荷特征传导的配电台区全状态精准感知与数字化应用

针对低压配电网存在的状态感知水平较低、数据共享挖掘不足等典型问题,结合能源互联网示范台区项目建设内容,以能源互联网的建设理念进行"信息支撑"和"价值创造"2方面的技术突破和应用.首先利用用户负荷特征和故障特征在低压电网中的纵、横向传导特性,构建台区的变、线、户、相位、电气阻抗完整拓扑信息,极大简化采集架构,完成台区全状...     

燃煤电厂湿式电除尘器减排及能效特性研究

在工况及负荷稳定的情况下,对122台燃煤电厂配套湿式电除尘器(金属板式35台、导电玻璃钢87台)开展多污染物的减排特性和能耗测试分析,结果表明,湿式电除尘器对各类污染物均具有较高的脱除效率,绝大部分湿式电除尘器出口颗粒物、PM2.5、雾滴和SO3可分别控制在5、2.5、25和10 mg/m3以下,出口PM2.5/PM占...     

基于控制网关的环境舒适性检测系统

随着互联网信息技术的发展,智能家居得到普及应用,如何检测并评价家居环境的舒适性非常重要。建立一个系统将环境检测模块和无线传感节点加载到控制网关上,实现方便、快捷的网络信息交互,用户可以随时随地了解家庭环境状况,并能通过该检测系统及时采取自调节措施,使偏离的环境状况趋向设定值。该检测系统能够保证内部网络通讯实时可靠,实现环境参数的有效采集和控制,为后续环境舒适性指标的平衡评测提供可靠的载体。     

基于FPGA的实时视频处理平台设计

为了能够实时地采集、处理、显示视频,设计并实现了一种基于双PowerPC硬核架构的实时视频处理平台;用硬件实现视频的预处理算法,并以用户IP核的形式添加到硬件系统中,上层的视频处理软件程序则直接从存储器中调用预处理后的图像数据;重点介绍了在FPGA上构建双PowerPC硬核架构的硬件系统;采用乒乓控制算法缓存一行图像数据;用DMA的方式将图像数据保存在存储器中;以边缘检测作为视频预处理算法的一个实例,在平台上实现,实验结果表明,用本平台实现仅需40ms;本平台能够实时处理视频,具有较高的实用价值。     

电容式电磁流量计信号处理新方法研究

电容式电磁流量计采用电容耦合的方式检测流量信号,其信号微弱、易受干扰、信噪比低,使得流量信号检出难度较大。对此,本文在信号处理中引入了互相关检测技术,设计了一种适合矩形波励磁下的电磁流量计信号特点的旋转电容滤波方式,采用的滤波器具有很高的信噪比,并且实现简单。在此基础上研制了一套原理样机,实验结果表明,该方法是有效的。     

Modeling the growth of Indian and Chinese liquid crystals literature as reflected in Science Citation Index (1997–2006)

The present paper describes the application of growth models as suggested by Egghe and Ravichadra Rao (Scientometrics 25:5–46, 1992). The scope of the paper is limited to study the growth and dynamics of Indian and Chinese publications in the field of liquid crystals research (1997–2006).     

A novel de-rusting method with molten salt precleaning and laser cleaning for the recycling of steel parts

Clean Technologies and Environmental Policy - Steel parts are a kind of high recovery value product for which de-rusting is the primary step in the recycling process. Laser cleaning is a popular...     

Direct measurement of the Raman enhancement factor of rhodamine 6G on graphene under resonant excitation

Graphene substrates have recently been found to generate Raman enhancement. Systematic studies using different Raman probes have been implemented, but one of the most commonly used Raman probes, rhodamine 6G （R6G）, has yielded controversial results for the enhancement effect on graphene. Indeed, the Raman enhancement factor of R6G induced by graphene has never been measured directly under resonant excitation because of the presence of intense fluorescence backgrounds. In this study, a polarization-difference technique is used to suppress the fluorescence background by subtracting two spectra collected using different excitation laser polarizations. As a result, enhancement factors are obtained ranging between 1.7 and 5.6 for the four Raman modes of R6G at 611, 1,183, 1,361, and 1,647 cm-~ under resonant excitation by a 514.5 nm laser. By comparing these results with the results obtained under non-resonant excitation （632.8 nm） and pre-resonant excitation （593 nm）, the enhancement can be attributed to static chemical enhancement （CHEM） and tuning of the molecular resonance. Density functional theory simulations reveal that the orbital energies and densities for R6G are modified bv ~raphene dots.