国产高速线材轧机精轧机组的技术改进

对唐钢国产高线轧机精轧机组在设计、制造、装配上存在的问题进行了分析，并介绍了针对各种问题采取的相应改进措施和创新思路。改进后精轧机组事故时间由每月15h以上降至3h左右。生产作业率保持在85％以上，设备完好率有较大提高。     

一种基于FPGA的实时NPR系统

在进行非真实感渲染(NPR)处理时需要大量的计算,这对高帧率、高分辨率的视频做实时的NPR渲染是一个难题。根据FPGA以并行运算为主的特点,对传统的NPR算法做了改进和简化,最终设计了一种基于FPGA的实时NPR系统。实验结果表明,该系统对高帧率、高分辨率的视频做实时NPR处理具有运算速度快、系统稳定等特点,同时还具有体积小、便于携带等优点。     

Simultaneous Perturbation Stochastic Approximation with Norm‐Limited Update Vector

This paper addresses the convergence of simultaneous perturbation stochastic approximation (SPSA) with a norm‐limited update vector. We first illustrate an unstable solution of the standard SPSA algorithm which motivates the consideration of a modified version, where the norm of the update vector is limited to a certain value. Next, a result on the almost‐sure convergence is presented by reducing the modified algorithm into the standard SPSA algorithm and restricting the probability distribution for the perturbation to a Bernoulli distribution. Finally, we apply the modified algorithm to a system identification problem to demonstrate its performance.     

Sampled‐Data Approach to State Estimation Performance for Heterogeneous Distributed System with Fault

This paper considers the state estimation performance for heterogeneous distributed system with fault based on sampled‐data measurement. Firstly, a performance index for distributed state estimation is proposed. Based on the sampled‐data measurement of the heterogeneous distributed system, distributed state estimators are constructed. It is proved that by analyzing the distributed state estimation error systems, the required performance index for overall state estimation can be obtained using linear matrix inequality method. Finally, a simulation example is used to illustrate the effectiveness of the proposed theoretical scheme.     

基于物联网技术的智能农业应用系统

立足现代农业智能化发展和实际需求,合理选用ZigBee技术、无线组网技术、传感器技术、RFID技术、单片机智能控制技术、条码识别技术、嵌入式LTCP／IP技术、GSM通讯技术、GPRS通讯技术、GPS全球定位技术、DTU远程传送技术、TTS语音合成技术、自适应网关切换技术等物联网关键技术,设计了一种基于物联网技术的智能农业应用系统。该系统包括农业产品环境监测与培育平台系统、农业产品运输管理与控制系统、农业产品销售与分配管理系统等三个子系统,可通过远程交互方式来解决农作物的智能监测和培育、运输、销售等阶段的一些实际问题,最终实现农作物的科学培育、精准运输、产品溯源等智能农业应用。     

旋流燃烧器给粉方式对锅炉NO排放特性影响的数值模拟

使用可实现realizable κ-ε双方程模型,对600 Mw超临界锅炉LNASB燃烧器燃烧过程进行数值模拟.研究燃烧器给粉方式、二次风量及过量空气系数对炉膛内部NO分布的影响,对燃烧器拟改进结构与原结构NO生成特性进行比较.数值模拟结果表明,内二次风对NO影响较大,内二次风关闭时炉膛出口NO下降22%.主燃烧器区域过量空气系数对NO影响明显,过量空气系数较小时NO生成量较少;中心给粉可以有效地降低锅炉NO的生成,100%负荷投入5层燃烧器时NO下降16%,数值计算结果为燃烧器改进提供了NO生成的理论依据.并与试验结果进行对比,获得比较一致的结果.通过设备改进和燃烧调整,有效地控制了锅炉NO的排放,为LNASB燃烧器设计和运行提供了一定的降氐NO的理论基础.     

Water matrix effect on UV photodegradation of perfluorooctanoic acid

The widespread detection of perfluorinated compounds (PFCs) in the water environment has been a concern for the last several years, while effluents from wastewater treatment facilities are the major sources of these compounds. Even advanced oxidation technologies (AOTs) are not useful for mineralization of the compounds due to their very high stability. Photochemical techniques using particularly vacuum UV (VUV) have been found to be very promising in this regard. But the use of VUV in UV-based AOTs has still not progressed much. Moreover, the impact of water quality on PFCs photomineralization is unknown. This investigation aimed to assess photomineralization potentials of perfluorooctanoic acid (PFOA) in ultrapure water (UPW), tap water (TW), surface water and treated wastewater effluent using a reactor setup enabling maximum utilization of VUV emission of low pressure lamp in laboratory batch experiments. Neya River water (NRW) and the Nakahama Wastewater Treatment Plant Effluent (NWWTPE) represented surface water and treated wastewater effluent respectively. Also, tests were carried out in 50% diluted NRW and NWWTPE. PFOA photomineralization in terms of PFOA removal, defluorination and total organic carbon (TOC) removal are discussed. The usefulness of the method for PFOA mineralization in organic-rich wastewaters, and further research needs are also highlighted.     

HDTMA改性沸石吸附水中Cr（VI）研究

摘要：研究以阳离子表面活性剂HDTMA改性天然斜发沸石,制得HDTMA改性沸石,进而研究HDTMA改性沸石对废水中Cr（VI）的吸附特征。结果表明：HDTMAL改性沸石对cr（VI）吸附符合Langmuir等温式和拟二级动力学方程,饱和吸附量为10．99mg／g,吸附主要为化学吸附,但温度、pH值和干扰离-~HDTMA沸石吸附cr（VI）具有明显影响。