S Zorb装置生产国V汽油的实践

介绍了中国石化海南炼油化工有限公司S Zorb装置生产国V汽油时在操作上做出的调整及装置运行情况,指出了影响装置长期稳定生产国V汽油的主要因素和对策.通过调整操作和细化、强化吸附剂管理、严密监控再生器操作、提高关键设备的维护和管理水平等措施,装置分别经受住了超负荷运行、原料总硫大幅上升等情况的考验,能稳定生产硫质量分数不大于8 μg/g的国V汽油.期间原料硫质量分数平均为271 μg/g(最高达600μg/g),精制汽油RON损失小于0.9单位,抗爆指数损失小于0.5单位.证明装置能长期稳定生产超低硫含量的国V标准汽油.     

胶西北大尹格庄金矿床电解成矿机理及对找矿的启示

大尹格庄金矿床位于招平断裂带中段,矿床蚀变分带明显,大尹格庄断裂为一条导矿断裂,对矿体空间分布及侧伏具有明显的制约。蚀变岩岩石化学分析显示,黄铁绢英岩和绢英岩化碎裂岩中的Si有一部分来自钾长石化花岗岩,钾长石化花岗岩、绢英岩化碎裂岩和黄铁绢英岩中均有Fe、Mg、Mn的显著带入。在绢英岩化碎裂岩和黄铁绢英岩中普遍而显著聚集的元素还有Au、Ag、As、Mo、Bi、B、Ba、Rb、Sr等,在靠近招平断裂带的胶东群变质岩局部则有Mn、Co、Ni、Cr等元素的显著聚集。大尹格庄金矿床的电解成矿机理可以概括为:金矿体构成了"天然电解池"的阴极,在阴极附近发生的主要反应是SO2-4的还原与黄铁矿等硫化物矿物和自然金等金矿物的结晶反应,及绢英岩化水岩反应,以碳酸盐化和褐铁矿化为代表的蚀变岩构成了"天然电解池"的阳极。电解成矿机理有助于从一个新的视角认识胶西北蚀变岩型金矿床成矿作用及有关的找矿标志。     

Change of chemical states of niobium in the oxide layer of zirconium–niobium alloys with oxide growth

The change of chemical states of niobium with oxide growth was examined in the oxide layers of Zr–2.5Nb around the first kinetic transition by the conversion electron yield – X-ray absorption near-edge structure measurements. The detailed depth profiles of niobium chemical states were obtained in both the pre- and the post-transition oxide layers of Zr–2.5Nb formed in water at 663 K for 40–280 d. The depth profiling revealed that the inner oxide layer remained protective to oxidizing species even though in the post-transition region and this excellent stability of barrierness would be attributed the suppression of hydrogen pickup.     

波形板干燥器内液滴模拟的GPU加速研究

基于CUDA C,使用GPU模拟了波形板内大量液滴的二维运动。根据GPU硬件特性,优化了模拟算法。在CPU上实现相同算法,对比了单一液滴直径、不同液滴数量下GPU与CPU的计算时间。结果表明:液滴数量越大,GPU并行加速效果越明显,在液滴数量较大时,得到约60倍的加速。用GPU分析了典型液滴直径分布的情况,得到约30倍的加速。     

Self film‐forming and opaque hollow latexes fabricated via seeded emulsion polymerization followed by alkali post‐treatment

In order to obtain novel hollow latexes with both opaque and self film‐forming properties, the four‐layer core/shell latex particles—sequentially consisting of a high carboxyl‐containing soft core, a transition layer, a rigid supporting layer, and an outermost film‐forming layer—are first designed and prepared by emulsion polymerization, and then treated with alkali to fabricate self film‐forming hollow latexes. On the basis of the previous research on the three‐layer core/shell latex, influences of the composition and thickness of the film‐forming layer on the properties and morphologies of the four‐layer core/shell and the final hollow latexes are investigated. Results show that under optimized conditions with butyl acrylate/styrene (BA/St) mass ratio of 2/1, divinyl benzene (DVB) content of 1 wt %, and core/film‐forming layer mass ratio of 1/6 in the film‐forming layer preparation, the final hollow latex particles exhibit best morphology considering both light scattering efficiency and film‐forming capability at room temperature. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132, 42541.     

基于LD3320的语音识别智能垃圾桶设计

在互联网和自动化技术的不断发展的影响下,智能家居已经成为了当今物联网技术发展的重要热点方向之一。本设计基于ICRoute公司生产的非特定语音识别芯片LD3320,利用非特定语音识别算法实现垃圾桶的智能化声音识别和语音控制,完成语音控制垃圾桶各方向运动、非接触式智能开闭、容量检测功能。通过在模拟工作环境下对于设计正确识别率进行检测,证明系统在正常工作环境下的正确识别率达到88．4％,可以在2 m距离内有效完成设计动作和功能。     

物理化学教学改革的探讨与思考

物理化学内容涉及数量较多的抽象概念和繁杂公式而致使教师教学和学生学习难度较大。文章针对物理化学课程的专业特点,初步探讨了可以提高物理化学教学改革效果的方法,旨在调动学生的积极性,激发学生学习兴趣,强化学生的思维和实践技能,进而提升整体教学效率。     

Transformation of ZnO polycrystalline sheets into hexagon-like mesocrystalline ZnO rods (tubes) under ultrasonic vibration

The mesoscale assembly process is sensitive to additives that can modify the interactions of the crystal nucleus and the developing crystals with solid surfaces and soluble molecules. However, the presence of additives is not a prerequisite for the mesoscale transformation process. In this study, ZnO sheet networks were synthesized on Al foils by a hydrothermal process. Scanning electron microscopy and transmission electron microscopy images confirmed that under ultrasonic vibration, monolithic polycrystalline ZnO sheets transformed into hexagon-like mesocrystalline tubes or rods. The formation mechanism was discussed.     

催化水解法低温脱除煤气中羰基硫的研究

采用等体积浸渍法制备了负载钼酸铵、碳酸钾、氢氧化钠3种活性组分的氧化铝基水解催化剂,考察了氧含量、温度、湿度对羰基硫水解转化率的影响。实验结果表明,随着氧含量的增加,催化剂反应活性降低;随着温度的升高,催化剂反应活性提高。水蒸气在低含量时可促进水解反应进行,但含量过高则会造成催化剂反应活性的下降。该催化剂在80~100℃,湿度25%条件下具有优异的水解活性和稳定性。     

一种航空相机机载任务处理系统设计

航空相机安装在航空飞行器上,用于获取高质量的航拍图像。航空相机在机载环境下工作时,需要为像移补偿组件提供姿态和飞行参数使其工作,同时需要发出工作指令并监控航空相机返回的信息。为此提出了一套机载任务处理系统系统,采用高端工业计算机和多通道串行总线接口卡为硬件平台,设计了系统的人机交互软件,实现对机上惯导系统的飞行参数接收并接收人工输入的工作指令,使相机正常工作。对系统组成、模块的功能、总线数据收发信息的处理机制进行了描述。使用该系统控制某航空相机空中工作,所获取的图像清晰满足指标要求,这表明该系统工作正常,性能稳定。