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期刊论文 13

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2023 3

2022 1

2020 1

2019 1

2018 1

2017 1

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2012 1

2011 1

2008 1

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关键词

PCB缺陷检测 1

冷却塔 1

双极板 1

图像对准 1

塔板设计 1

对准强度 1

开发现状 1

拓扑 1

架构上重要的需求（ASR）；架构权衡分析法（ATAM）；互联网架构板；物联网；隐私增强技术；隐私验证链 1

燃料电池 1

电催化剂 1

膜电极 1

螺旋曲面 1

质子交换膜 1

轴向磁通电机；印制电路板；Halbach永磁体阵列；有限元法 1

边缘点抽样 1

高排放识别；时序优化；车载诊断设备（OBD）；动态阈值 1

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Design of noise-reduction seats for high-speed trains

Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU

《机械工程前沿（英文）》 2018年第13卷第3期页码 385-389 doi: 10.1007/s11465-017-0438-x

摘要：

Noise-reduction seats have been successfully used in concert halls, theaters, and other places that reduce noise. In this study, a new noise-reduction seat design was proposed for high-speed trains, which have unique interior noise spectral characteristics. First, before the noise-reduction seat models were fabricated, the parameters of high-performance sound-absorbing materials and perforated plates were selected by conducting a standing-wave tube test. The sound-absorption effects of the noise-reduction seats and normal seats were investigated and compared in a reverberation chamber. Test results showed that, compared with normal seats, the noise-reduction seats obtained a significantly improved sound-absorption coefficient in the entire frequency band. Furthermore, the test results were used to establish a simulation model for calculation, and the simulation results proved that the noise-reduction seats substantially reduced the noise in an entire train car. Finally, the noise-reduction seats were fabricated and installed in a full train car of an actual high-speed train. The test results showed that, compared with the normal seats, the noise-reduction seats decreased the noise level at a standard point in the passenger car by 1.5 dB. Therefore, the noise-reduction seats are effective in noise reduction.

关键词： high-speed train sound-absorbing materials perforated board noise-reduction seats

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Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform

《机械工程前沿（英文）》 2023年第18卷第1期 doi: 10.1007/s11465-022-0730-2

摘要： Ultrasonic vibration-assisted grinding (UVAG) is an advanced hybrid process for the precision machining of difficult-to-cut materials. The resonator is a critical part of the UVAG system. Its performance considerably influences the vibration amplitude and resonant frequency. In this work, a novel perforated ultrasonic vibration platform resonator was developed for UVAG. The holes were evenly arranged at the top and side surfaces of the vibration platform to improve the vibration characteristics. A modified apparent elasticity method (AEM) was proposed to reveal the influence of holes on the vibration mode. The performance of the vibration platform was evaluated by the vibration tests and UVAG experiments of particulate-reinforced titanium matrix composites. Results indicate that the reasonable distribution of holes helps improve the resonant frequency and vibration mode. The modified AEM, the finite element method, and the vibration tests show a high degree of consistency for developing the perforated ultrasonic vibration platform with a maximum frequency error of 3%. The employment of ultrasonic vibration reduces the grinding force by 36% at most, thereby decreasing the machined surface defects, such as voids, cracks, and burnout.

关键词： ultrasonic vibration-assisted grinding perforated ultrasonic vibration platform vibration characteristics apparent elasticity method grinding force surface integrity

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Real-world fuel consumption of light-duty passenger vehicles using on-board diagnostic (OBD) systems

Xuan Zheng, Sheng Lu, Liuhanzi Yang, Min Yan, Guangyi Xu, Xiaomeng Wu, Lixin Fu, Ye Wu

《环境科学与工程前沿（英文）》 2020年第14卷第2期 doi: 10.1007/s11783-019-1212-6

摘要： • Fuel consumption (FC) from LDPVs is measured using on-board diagnostic method (OBD). • The FC of the OBD is 7.1% lower than that of the carbon balance results. • The discrepancy between the approved FC and real-world FC is 13%±18%. • There is a strong relationship (R2=0.984) between the average speed and relative FC. An increasing discrepancy between real-world and type-approval fuel consumption for light-duty passenger vehicles (LDPVs) has been reported by several studies. Normally, real-world fuel consumption is measured primarily by a portable emission measurement system. The on-board diagnostic (OBD) approach, which is flexible and offers high-resolution data collection, is a promising fuel consumption monitoring method. Three LDPVs were tested with a laboratory dynamometer based on a type-approval cycle, the New European Driving Cycle (NEDC). Fuel consumption was measured by the OBD and constant-volume sampling system (CVS, a regulatory method) to verify the accuracy of the OBD values. The results of the OBD method and the regulatory carbon balance method exhibited a strong linear correlation (e.g., R2 = 0.906-0.977). Compared with the carbon balance results, the fuel consumption results using the OBD were 7.1%±4.3% lower on average. Furthermore, the real-world fuel consumption of six LDPVs was tested in Beijing using the OBD. The results showed that the normalized NEDC real-world fuel consumption of the tested vehicles was 13%±17% higher than the type-approval-based fuel consumption. Because the OBD values are lower than the actual fuel consumption, using a carbon balance method may result in a larger discrepancy between real-word and type-approval fuel consumption. By means of the operating mode binning and micro trip methods, a strong relationship (R2 = 0.984) was established between the average speed and relative fuel consumption. For congested roads (average vehicle speed less than 25 km/h), the fuel consumption of LDPVs is highly sensitive to changes in average speed.

关键词： Fuel consumption Light-duty passenger vehicles On-board diagnostic systems

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螺旋结构冷却塔的塔板设计方法

黄锐

《中国工程科学》 2008年第10卷第11期页码 43-46

摘要：

针对冷却塔中螺旋结构类型的气液交换塔，提出其内部螺旋塔板形状的设计方法，包括塔壁上外螺旋线和塔中心轴管上内螺旋线的位置确定，以及两线之间螺旋曲面板在平面上的拓扑尺寸。通过塔的几何参数确定螺旋曲面板设计的关键参数，可实现扭曲状塔板与塔壁及内轴的准确配合。

关键词：冷却塔塔板设计螺旋曲面拓扑

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增材制造专题引言

增材制造专题编委会

《工程（英文）》 2017年第3卷第5期 doi: 10.1016/J.ENG.2017.05.027

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Self-catalytic pyrolysis thermodynamics of waste printed circuit boards with co-existing metals

《环境科学与工程前沿（英文）》 2022年第16卷第11期 doi: 10.1007/s11783-022-1581-0

摘要：

● The co-existing metals in WPCBs has positive catalytic influence in pyrolysis.

关键词： Waste printed circuit board Catalyst Pyrolysis Kinetics

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An Empirical Study on the Internal Control Efficiency of Listed Engineering Companies

Zhi-wen Wang,Jing Tong

《工程管理前沿（英文）》 2015年第2卷第2期页码 159-164 doi: 10.15302/J-FEM-2015026

摘要： The authors carried out an empirical study on the internal control efficiency of publically listed engineering companies in China. This study presents an exploration of the relationship of independent director ratios, audit committee quality and auditor independence with the internal control efficiency of publically listed engineering companies and forward suggestions and recommendations on raising the internal control efficiency of publically listed engineering companies.

关键词： internal control efficiency board of directors independent directors audit committee

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Thermal cracking of waste printed wiring boards for mechanical recycling by using residual steam preprocessing

Yao CHEN, Jinhui LI, Huabo DUAN, Zhishi WANG

《环境科学与工程前沿（英文）》 2011年第5卷第2期页码 167-174 doi: 10.1007/s11783-011-0308-4

摘要： Mechanical waste-processing methods, which combine crushing and separation processes for the recovery of valuable materials, have been widely applied in waste printed wiring board (PWB) treatment. However, both the high impact toughness and the tensile and flexural strengths of whole PWB with a laminated structure result in great energy consumption and severe abrasion of the cutters during multi-level crushing. In addition, the high temperatures occurring in continual crushing probably cause the decomposition of the polymer matrix. A thermal-crack method using residual steam as the heating medium has been developed to pre-treat waste PWBs. This treatment reduces the mechanical strength in order to improve the recovery rate of valuable materials in subsequent mechanical recycling. The changes of the PWBs’ macro-mechanical properties were studied to evaluate thermal expansion impacts associated with changes in temperature, and the dynamic dislocation micro-structures were observed to identify the fracture mechanism. The results showed that thermal cracking with steam at the temperature of 500 K can effectively attenuate the mechanical properties of waste PWBs, by reducing the impact, tensile and flexural strengths respectively, by 59.2%, 49.3% and 51.4%, compared to untreated PWB. Thermal expansion can also facilitate the separation of copper from glass fiber by reducing peel resistance by 95.4% at 500 K. It was revealed that the flexural fracture was a transverse cracking caused by concentrated stress when the heating temperature was less than 500 K, and shifted to a vertical cracking after exceeding 500 K.

关键词： waste printed wiring board (PWB) residue steam thermal-crack mechanical properties

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质子交换膜燃料电池的研究进展

任学佑

《中国工程科学》 2005年第7卷第1期页码 86-94

摘要：

论述了质子交换膜燃料电池的开发现状及国内外研究进展；同时介绍了趋于成熟的贮氢技术，包括质子交换膜、双极板、膜电极和电催化剂在内的关键技术、应用以及未来展望。

关键词：燃料电池质子交换膜双极板膜电极电催化剂开发现状

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基于AOI的印刷电路图像对准算法研究

郭峰林,管庶安,孔岩

《中国工程科学》 2012年第14卷第11期页码 103-106

摘要：

基于AOI的PCB检测系统中，样本PCB图像与待测PCB图像之间存在错位偏差，需要对准后才能进行下一步的检测工作。首先，依据PCB线路特征，定义了样本图像边缘点的概念，制订了边缘点抽样规则。针对待测PCB图像，提出了基于样本边缘点对准强度评价函数，建立了对准评价模型及对准快速算法。最后，通过PCB对准实验以及大量的实际测试应用，证明对准强度评价模型能准确地描述待测PCB图像与样本图像间的对准程度，对准模型为后期的缺陷搜索提供了可靠的偏移参数。

关键词： PCB缺陷检测图像对准边缘点抽样对准强度

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基于新型拓扑Halbach阵列的PCB定子无铁心轴向磁通电机设计 Regular Papers

Xiao-yuan WANG, Xiang LI, Chun-peng LI, Si-jia XU, Le-tao LING

《信息与电子工程前沿（英文）》 2019年第20卷第3期页码 414-424 doi: 10.1631/FITEE.1700345

摘要：针对印刷电路板（PCB）定子轴向磁通永磁电机特点，提出一种新型拓扑Halbach永磁体阵列，设计并分析应用该永磁体阵列的PCB定子轴向磁通永磁电机。与传统无铁心轴向磁通永磁电机相比，在相同尺寸、同等永磁体用量下，该新型拓扑Halbach永磁体阵列PCB定子轴向磁通永磁电机具有更高气隙磁密及每极磁通，可获得更高空载反电势，同时有效降低漏磁，使气隙磁密更接近正弦波，提升了电机整体性能。有限元分析结果和样机对比实验验证了该新型拓扑Halbach永磁体阵列PCB定子电机的合理性和有效性，为PCB定子轴向磁通永磁电机设计提供了参考依据和工程应用价值。

关键词：轴向磁通电机；印制电路板；Halbach永磁体阵列；有限元法

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基于时序优化长短期记忆和自适应阈值的高排放重型柴油车识别 Research Article

许镇义1,王仁军1,2,曹洋1,3,4,康宇1,3,4

《信息与电子工程前沿（英文）》 2023年第24卷第11期页码 1633-1646 doi: 10.1631/FITEE.2300005

摘要：在实际场景中，重型柴油车是城市氮氧化物的重要来源，其排放的氮氧化物（NOx）占车辆总排放量的80％以上，颗粒物（PM）占90％以上。检测和控制重型柴油车的排放对保护公众健康至关重要。目前，道路上的车辆必须每6个月或每年定期检测一次，在车辆检查站过滤出高排放的移动源。然而，由于年检间隔时间较长，很难及时有效地筛选出高排放车辆，而且固定的阈值不能适应车辆驾驶工况的动态变化。车载诊断设备（OBD）安装在车辆内部，可以连续跟踪和实时记录排放数据。本文提出一种时间优化长短期记忆（LSTM）和自适应动态阈值方法，使用OBD数据识别重型高排放车辆。首先，建立一个时间优化LSTM排放预测模型，以解决实际中大量OBD数据流造成的时间步注意力偏重问题。然后，利用灵活的阈值标准检测浓度预测误差序列，以区分异常排放情况，该阈值随驾驶条件变化自适应计算得到。最后，引入时间序列的相似性度量策略，以纠正一些假的异常结果。在3个真实OBD时间序列排放数据集上的实验表明，该方法得到优异的高排放源识别结果。

关键词：高排放识别；时序优化；车载诊断设备（OBD）；动态阈值

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物联网隐私与安全联合参考架构 Position Paper

Musab KAMAL1, Imran RASHID1, Waseem IQBAL1, Muhammad Haroon SIDDIQUI1, Sohaib KHAN1, Ijaz AHMAD2

《信息与电子工程前沿（英文）》 2023年第24卷第4期页码 481-508 doi: 10.1631/FITEE.2200368

摘要：各种物体正以惊人速度连接到互联网，使物联网概念成为现实。物联网生态系统正以智能家居、医疗保健系统、可穿戴设备、联网车辆和多种产业形式普及，由此增加了与系统隐私和安全相关的风险。架构缺陷带来的物联网设备安全问题和网络攻击可能阻碍物联网产品的发展。解决这些问题，需在物联网构建块中设置隐私和安全权限。多年来，物联网架构不断演变，通过可测量性、管理、互操作性和可扩展性等新方案改进了架构。为此，亟需结合隐私和安全考量，对物联网参考架构进行标准化和有效管理。本文检查了12个现有物联网参考架构，对照标准中的要求，分析各自不足之处。基于此，提出一种新的架构，即结合隐私的物联网安全参考架构（PF-IoT-SRA），其诠释了物联网通信环境中所有隐私指标，可以对抗主要威胁和攻击。这是朝着领域架构标准化迈出的一步。我们使用架构权衡分析法（ATAM）——一种行业认可的基于场景的方法——验证了所提参考架构的有效性。

关键词：架构上重要的需求（ASR）；架构权衡分析法（ATAM）；互联网架构板；物联网；隐私增强技术；隐私验证链

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标题作者时间类型操作

Design of noise-reduction seats for high-speed trains

Xiaojun DENG, Yanju ZHAO, Haijin ZHANG, Renzhong SHUAI, Leiwei ZHU

期刊论文

Vibration characteristics and machining performance of a novel perforated ultrasonic vibration platform

期刊论文

Real-world fuel consumption of light-duty passenger vehicles using on-board diagnostic (OBD) systems

Xuan Zheng, Sheng Lu, Liuhanzi Yang, Min Yan, Guangyi Xu, Xiaomeng Wu, Lixin Fu, Ye Wu

期刊论文

螺旋结构冷却塔的塔板设计方法