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| 1 | 基于氧传感器信号的用于研究空气/燃料比率变化的统计方法显示文摘给出了火花点火式发动机排气氧传感器(EGO)输出信号的实验结果。实验中采用V6、3.8 L、BUICK发动机且每个气缸中安装有一个氧传感器,以研究影响发动机消耗燃料的因素。应用LabView数据采集装置记录单个气缸废气以及主流尾气氧传感器的输出电压信号。对来自6个气缸变量的平均值采用统计的方法进行处理后,并与主流的EGO电压进行比较,确定了产生系统误差的因素。对左右两侧气缸信号平均值的差别进行比较发现,采用此种排气管结构的气缸中空气—燃料混合气平均值存在一些明显差别。根据数据和图表解释了统计的结果。研究表明,V字形排列的发动机两侧的气缸的空气和燃料混合气是不同的;在低速、高负荷和高辛烷燃料的情况下,右侧气缸具有比较稀的混合气;而在某些情况下两侧气缸具有相同的混合气。基于统计估计的方法,提出了一个可以用于估计V字形排列发动机左右两侧气缸中空气—燃料混合气的简单模型。此方法还可以应用于分析进气管和排气管的缺陷。 | Etim U Ubong Boyan Dimitrov | 2008 | 内燃机学报2008，26，1： | 3 |
| 2 | Bioinspired and hydrophobic alkyl-silanized protective polymer coating for Mg alloy显示文摘The modification of silica coating surfaces by trimethylsilylation has contributed to enhanced hydrophobicity(θ_w^o>90°)against fluid permeation and corrosion in Na Cl.These alkyl-silanized coatings were deployed to protect Mg alloy after reinforcing their internal structures with nanosilica powder.The reduced wetness of coating surfaces is attributed to their chemically-modified surface morphology,and this has been compared to the reticulate leaf structures of lotus plant.The optimum amount of silylating additive(hexamethyldisilazane)required to prepare a hydrophobic coating with minimum water adhesion has been established.Barrier performance of coatings were examined by electrochemical and surface analyses in 5 wt%Na Cl.The corrosion resistance of these coatings is a result of the direct contribution of their bulk stability and surface hydrophobicity,and this is expressed in terms of the variation of electrochemical parameters with exposure time.These coatings may have emerging industrial applications,including a future in metal surface treatments and anticorrosion paints. | Ubong Eduok Jerzy Szpunar | 2018 | Progress in Natural Science:Materials International2018，28，3： | 2 |
| 3 | Physicochemical properties of Pit-Water from Ishiagu lead-zinc(Pb/Zn)mine as an index for alkaline classification of the mine drainage显示文摘 | Aroh K N Eze C L Abam T K S Gobo A E Ubong I U | | 0，，04： | 1 |
| 4 | 无支撑剂高导流通道压裂技术的发展和现场应用——与常规压裂措施井相比,在支撑剂用量减少40%的情况下,无支撑剂通道压裂措施井的产量增幅仍十分显著显示文摘为了评估支撑剂聚集体和无支撑剂通道(PFC)的形成及稳定性,开展了大量室内实验和大尺度测试。将支撑剂携带液与可交联的无支撑剂隔离液通过间歇脉冲注入,形成由无支撑剂凝胶段塞所包围的支撑剂聚集体。当交联凝胶段塞破胶并从支撑裂缝中运移出去后,留下支持闭合裂缝的支撑剂聚集体,由此可形成包围支撑剂聚集体的高导流通道。常规和非常规储层的现场试验表明,采用脉冲方法注入支撑剂携带液和无支撑剂隔离液的压力显著低于常规压裂措施的注入压力;与常规压裂措施井相比,在支撑剂用量减少40%的情况下,无支撑剂通道压裂措施井的产量增幅仍十分显著。 | Ubong Inyang Philip Nguyen Janette Cortez-Montalvo | 2016 | 世界石油工业2016，0，3： | 0 |
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