Sub-ambient cold-start emissions reduction using SwRI® PO x catalyst technology

This paper describes the application of SwRI’s cold-start PO _x catalyst technology to reduce cold-start hydrocarbon emissions from a US Tier 2 vehicle at −7 °C. A reduction in −7 °C (20 °F) cold-start hydrocarbons will help US Tier 2 vehicles meet the proposed EPA NMOG standards. Improvements in cold temperature hydrocarbon emissions would also be beneficial in many parts of Europe during the winter months. In this work, a total hydrocarbon reduction of 19% was realized at 24 °C, in line with previous results, but only up to 3% at −7 °C. Insufficient oxygen in the engine-out exhaust gas at −7 °C was determined to be the reason why the PO _x catalyst failed to significantly reduce HC emissions. Addition of supplemental oxygen to the exhaust during the cold-start, to simulate an adjustment in the engine calibration to less rich operation, resulted in a total hydrocarbon reduction of 18% with the PO _x catalysts in place, but no benefit when the PO _x catalysts were removed. Hence, the PO _x catalyst approach can be used to good effect, even under sub-ambient cold-start conditions.     

基于STM32的多相LED穹形光源控制系统设计

针对工业视觉检测中对光源的照射角度、光源亮度、颜色等调节要求,设计了一种基于STM32的多相LED穹形光源控制系统,给出了系统实现方案及各模块具体实现,实现了光源参数的连续可调控制。     

基于STM32的可燃气体报警仪控制系统

可燃气体报警控制器采用STM32高性能低功耗ARM处理器,可同时处理10通道可燃气体探测器的报警信息,且满足国家标准GB 16808-2008对可燃气体控制器的强制性要求,在保证控制系统高可靠性、高实时性的同时,尽量简化电路和提高集成度。     

SOE系统输入卡件的设计

事件顺序记录,即SOE（Sequence of Events）系统可以正确、快速地确定事故故障,迅速处理事故,恢复系统的正常运行。SOE系统中输入卡件的设计,包括卡件的组成及软件模块的设计。产品测试表明,系统接收多点数据信息正确,能够及时准确的反映数据采集的实时数值,并提供报警信息。     

Phosphorus availability from phosphate rock and sewage sludge as influenced by the addition of water soluble phosphate fertilizer

Phosphorus (P) inputs are required for sustainable agricultural production in most acid soils of the tropics and subtropics. Phosphate rocks (PR) and organic materials have been suggested as alternative P sources in these soils. Quantitative information on the P availability from sewage sludge (SL) is scanty. Methods to improve the effectiveness of PR such as partial acidulation and compaction with water-soluble P sources have been recommended. The objective of this greenhouse study was to evaluate the relative agronomic effectiveness (RAE) of Florida PR and sewage sludges (irradiated and non-irradiated) applied alone and in mixture with a water-soluble source (triple superphosphate, TSP) at two rates (50 and 150 mg P kg^–1 soil). The ³²P isotope dilution technique was utilised to determine the proportion of P in the plant taken up from the P fertilizer treatments. Wheat was grown on an acid loamy sand Dystric Eutrocrepts and harvested 6 weeks after planting. Results on total P uptake and the RAE of the P fertilizer sources tested indicated that the addition of 50 mg P kg^–1 soil as TSP was adequate in supplying P to the 6-week-old wheat plants as compared to PR and sewage sludge. Intermediate values were obtained for the mixtures. Similar responses were observed for the high P rate. For a given P rate, phosphorus uptake from PR and SL in presence of TSP was higher than P uptake from these sources alone, indicating an enhancement effect of TSP on the effectiveness of these non-readily available sources. With respect to P uptake from PR applied alone, the relative increases in P uptake from PR due to TSP influence were 52 and 67% for the low and high P rates, respectively. The relative increases in P uptake from SL due to TSP when compared to P uptake from SL alone were 102 and 59% for the low and high P rates of application. Application of a water-soluble P fertilizer together with a non-readily available P source shows an enhancement on the P uptake from the non-readily available P source by the wheat plants. In this experiment the estimated enhancement effects are very likely underestimated.     

剖析F型、GK型密炼机结构特征

目前，以美国F型和德国GK型为代表的密炼机已在我国基本上实现了国产化。对这两类密炼机的结构特点和安装、使用上的利与弊，本文从密炼装置、转子密封装置、卸料装置、锁紧装置到主传动5个方面作了详细的剖析，并在此基础上，提出一个取长补短的新的密炼机设计方案。     

C．F．布朗深冷净化系统模拟分析

通过模拟计算对深冷净化系统做了深入的分析，研究了深冷净化系统脱除甲烷化气中过量氮、甲烷、惰气和回收弛放气中氢的能力，甲烷化气组成和压力对净化效果和操作稳定性的影响。     

F离子掺杂TiO2的性能研究

以NH4F为掺杂剂，采用溶胶-凝胶法制备F离子掺杂型TiO2光催化剂，对其进行XRD、XPS和PL表征，结果表明，F离子掺杂ToO2由于Ti—F配位体的形成而能抑制金红石相的生成，同时F离子掺杂能增加TiO2表面缺陷浓度并降低Ti2P键的结合能，另外，由于F离子能取代Ti—OH配位体而降低了表面羟基氧浓度．光催化研究结果表明，F离子掺杂提高了TiO2光催化活性近1．5倍．     

基于MSP430单片机远程家庭环境监测报警器的设计与实现

随着物联网的发展,本文介绍一种基于GSM 的家居环境监控系统。主要以MSP430单片机为控制中心, YM12864液晶显示器和WTV020-SD语音模块作为人机交互设备,TC35i作为GSM通信模块,设计利用温、湿度传感器DHT11,MQ系列烟雾传感器等对环境的温度、湿度、烟雾、可燃气体等进行实时监测并实现现场参数的显示、报警、语音提示与远程手机报警,可将测得的数据传送由单片机处理后通过GSM通信模块将转换来的数据以短信的方式发送到手机,达到远程监测的目的。     

溶胶凝胶法制备LiNi0.01Co0.01Mn1.98O3.95F0.05及其电化学性能

采用溶胶凝胶法合成锂离子电池正极材料LiMn2O4、LiNi0.01Co0.01Mn1.98O4和LiNi0.01Co0.01Mn1.98O3.95F0.05。使用X射线衍射、扫描电子显微镜对合成材料的结构及物理性能进行了表征。将合成材料作为锂离子电池正极活性材料,用循环伏安、交流阻抗及充放电测试的电化学测试方法对材料进行了电化学的研究。结果表明,合成的LiNi0.01Co0.01Mn1.98O3.95F0.05材料的初始容量高于LiNi0.01Co0.01Mn1.98O4,而循环性能优于LiNi0.01Co0.01Mn1.98O4和LiMn2O4,显示了阴阳离子复合掺杂对于阳离子单一掺杂的优势。