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期刊论文 4

年份

2023 1

2019 2

2009 1

关键词

GPS轨迹 1

Spark 1

乘客热点预测 1

内容传播；设备通信；机会网络；线性阈值模型 1

双向门控循环单元（BiGRU） 1

空间注意力机制 1

集合经验模态分解（EEMD） 1

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Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with

Jie WANG, Zuohua HUANG, Bing LIU, Xibin WANG

《能源前沿（英文）》 2009年 第3卷 第2期   页码 204-211 doi: 10.1007/s11708-009-0026-9

摘要： A numerical simulation of the influence of different hydrogen fractions, excess air ratios and EGR mass fractions in a spark-ignition engine was conducted. Good agreement between the calculated and measured in-cylinder pressure traces as well as pollutant formation trends was obtained. The simulation results show that NO concentration has an exponential relationship with temperature and increases sharply as hydrogen is added. EGR introduction strongly influences the gas temperature and NO concentration in the cylinder. The difference in temperature will lead to even greater difference in NO concentration. Thus, EGR can effectively decrease NO concentration. NO concentration reaches its peak value at the excess air ratio of 1.1 regardless of EGR mass fraction. The study shows that natural gas-hydrogen blend combined with EGR can realize a stable combustion and low NO emission in a spark-ignition engine.

关键词： natural gas     hydrogen     NO     exhaust gas recirculation     numerical simulation    

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基于Spark面向分布式EEMDN-SABiGRU模型的乘客热点预测

夏大文,耿建,黄瑞曦,申冰琪,胡杨,李艳涛,李华青

《信息与电子工程前沿（英文）》 2023年 第24卷 第9期   页码 1316-1331 doi: 10.1631/FITEE.2200621

摘要： 针对出租车与乘客之间的供需不平衡问题，本文提出一种基于Spark的分布式归一化集合经验模态分解和面向空间注意力机制的双向门控循环单元（EEMDN-SABiGRU）模型，实现乘客热点的精准预测最后，在Spark并行计算框架下，采用真实的出租车GPS轨迹数据，基于EEMDN-SABiGRU模型实现了乘客热点的准确预测。

关键词： 乘客热点预测     集合经验模态分解（EEMD）     空间注意力机制     双向门控循环单元（BiGRU）     GPS轨迹     Spark    

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Synthesis of Ag and Cd nanoparticles by nanosecond pulsed discharge in liquid nitrogen

Mahmoud Trad, Alexandre Nominé, Natalie Tarasenka, Jaafar Ghanbaja, Cédric Noël, Malek Tabbal, Thierry Belmonte

《化学科学与工程前沿（英文）》 2019年 第13卷 第2期   页码 360-368 doi: 10.1007/s11705-019-1802-7

摘要： The synthesis of CdO, Ag O (5 nm) and Ag (~20‒30 nm) nano-objects is achieved simultaneously by nanosecond-pulsed discharges in liquid nitrogen between one cadmium electrode and one silver electrode. Oxidation occurs when liquid nitrogen is fully evaporated and nanoparticles are in contact with the air. No alloy is formed, whatever the conditions, even though both elements are present simultaneously, as showed by time-resolved optical emission spectroscopy. This lack of reactivity between elements is attributed to the high pressure within the discharge that keeps each metallic vapor around the electrode it comes from. Each element exhibits a specific behavior. Cubic Cd particles, formed at 4 kV, get elongated with filamentary tips when the applied voltage reaches 7 and 10 kV. Cd wires are formed by assembly in liquid nitrogen of Cd nanoparticles driven by dipole assembly, and not by dielectrophoresis. On the contrary, silver spherical particles get assembled into 2D dendritic structures. The anisotropic growth of these structures is assumed to be due to the existence of pressure gradients.

关键词： spark discharges     submerged discharges     time-resolved optical emission spectroscopy     liquid nitrogen    

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基于Spark的机会环境中内容传播特征度量与分析 Research Article

Xiao-hong Zhang, Kai Qian, Jian-ji Ren, Zong-pu Jia, Tian-peng Jiang, Quan Zhang,xh.zhang@hpu.edu.cn,renjianji@hpu.edu.cn

《信息与电子工程前沿（英文）》 2019年 第20卷 第10期   页码 1404-1414 doi: 10.1631/FITEE.1900137

摘要： 机会网络为分流移动网络中由流行内容共享引起的巨大负载提供了机会。分析真实机会环境中的内容传播特征可以为负载分流决策提供重要线索。然而，由于从真实机会环境中收集数据并非易事，相关工作非常有限。本文以致力于内容共享的移动应用“闪传”为研究对象，从该应用用户构成的真实机会网络中搜集数据并分析。为发现内容传播特征，本文从传播规模和速度、内容类型等方面展开分析。分析结果表明，文件传输具有明显周期性，只有很少一部分文件能广泛传播，且移动应用类文件比其他类型文件更易成为流行文件。本文还提出一种有助于预测流行文件的最大化文件传播规模的方法。实验结果证实了该方法的有效性和有用性。

关键词： 内容传播；设备通信；机会网络；线性阈值模型    

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标题 作者 时间 类型 操作

Simulation of combustion in spark-ignition engine fuelled with natural gas-hydrogen blends combined with

Jie WANG, Zuohua HUANG, Bing LIU, Xibin WANG

期刊论文

基于Spark面向分布式EEMDN-SABiGRU模型的乘客热点预测

夏大文,耿建,黄瑞曦,申冰琪,胡杨,李艳涛,李华青

期刊论文

Synthesis of Ag and Cd nanoparticles by nanosecond pulsed discharge in liquid nitrogen

Mahmoud Trad, Alexandre Nominé, Natalie Tarasenka, Jaafar Ghanbaja, Cédric Noël, Malek Tabbal, Thierry Belmonte

期刊论文

基于Spark的机会环境中内容传播特征度量与分析

Xiao-hong Zhang, Kai Qian, Jian-ji Ren, Zong-pu Jia, Tian-peng Jiang, Quan Zhang,xh.zhang@hpu.edu.cn,renjianji@hpu.edu.cn

期刊论文