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Tribological performance of organic cadmium compound as lubricant additive

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中国有色金属学会会刊：英文版 2004年第z1期14卷 374-378页

作者： HU Jian-qiang XIE Feng ZHU Huan-qin ZHEN Fa-zheng yao jun-bing Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China Department of Aviation Oil Air Force Logistics Institute Xuzhou 221000 China First Department Aviation Oil Research Institute Beijing 100000 China

The oil-soluble cadmium dipropyldithiophosphate additive was synthesized. A four-ball tester was used to evaluate the tribological performance of the additive in a mineral oil under different loads and lubricant grease synthesized compared with some commercial additives. The results show that it exhibits excellent antiwear and load-carrying capacities and is better than other additives. The surface analytical tools such as scanning electron microscope (SEM) with energy dispersive X-ray (EDX), X-ray photoelectron spectrometer (XPS) were used to investigate the topography, the compositions, and chemical states of some typical elements on the rubbing surface of worn *** and light topography of worn scar further confirms that the additive shows good antiwear capacities. The results of EDX and XPS analyses indicate that tribochemical mixed protective films consisting of atomic cadmium, sulphides, sulphates and phosphates are formed on the rubbing surface, which contribute to improving the tribological properties of lubricant and grease. Particularly, the soft cadmium film formed plays an important role in improving antiwear properties of oils. Finally, antiwear mechanism of the additive and formation scheme of atomic cadmium was proposed.

关键词： cadmium dipropyldithiophosphate additive extreme pressure antiwear mechanism

Enhanced Microwave Absorption Properties of Double-Layer Absorbers Based on Spherical NiO and Co_(0.2)Ni_(0.4)Zn_(0.4)Fe_2O_4 Ferrite Composites

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Acta Metallurgica Sinica(English Letters) 2018年第2期31卷 171-179页

作者： Pei-Jiang Liu zheng-jun yao Vincent Ming Hong Ng Jin-Tang Zhou Zhi-Hong Yang Ling-Bing Kong College of Materials and Technology Nanjing University of Aeronautics and Astronautics Nanjing 211100 China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology Nanjing 211100 China School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Microwave absorption properties of spherical NiO particles and Co0.2Ni0.4Zn0.4Fe2O4（CNZF） ferrites with single-layer and double-layer absorbers were studied in the frequency range of 2–18 GHz. The spherical NiO particles were synthesized by using a hydrothermal process, while the CNZF powders were prepared by using a sol–gel autoignition method. The double-layer absorbers, composed of 30 wt% NiO as matching layer and 30 wt% CNZF as absorption layer,with a total thickness of 3.2 mm, exhibited a maximum reflection loss（RL） of –67.0 d B at 9.2 GHz and an effective absorbing bandwidth below –10 d B to be 3.9 GHz from 7.0 to 10.9 GHz. The excellent microwave absorption performance of the double-layer absorbers should be ascribed to the high impedance matching ratio, the great microwave attenuation capability, and well-coupled layer.

关键词： Hierarchical NiO particle Ferrite Impedance matching Microwave absorption property

First-principles calculations of solute–vacancy interactions in aluminum

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Chinese Physics B 2020年第6期29卷 369-373页

作者： Sha-Sha Zhang zheng-jun yao Xiang-Shan Kong Liang Chen Jing-Yu Qin College of Materials and Technology Nanjing University of Aeronautics and AstronauticsNanjing 211106China Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials Ministry of EducationShandong UniversityJinan 250061China

The interactions of solute atoms with vacancies play a key role in diffusion and precipitation of alloying elements,ultimately influencing the mechanical properties of aluminum *** this study,first-principles calculations are systematically performed to quantify the solute–vacancy interactions for the 3d–4p series and the 4d–5p *** solute–vacancy interaction gradually transforms from repulsion to attraction from left to *** solute–vacancy binding energy is sensitive to the supercell size for elements at the *** behaviors of the solute–vacancy binding energy can be understood in terms of the combination and competition between the elastic and electronic ***,the electronic binding energy follows a similar trend to the total binding energy and plays a major role in the solute–vacancy interactions.

关键词： first-principles calculations solute-vacancy binding aluminum alloys

Two-stage urethroplasty is a better choice for proximal hypospadias with severe chordee after urethral plate transection： a single-center experience

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Asian Journal of Andrology 2015年第1期17卷 94-97,I0009页

作者： Da-Chao zheng Hai-jun yao Zhi-Kang Cai jun Da Qi Chen Yan-Bo Chen Ke Zhang Ming-Xi Xu Mu-jun Lu Zhong Wang Department of Urology Shanghai 9th People's Hospital Shanghai Jiaotong University School of Medicine Shanghai 200011 China.

It is still debatable whether single- or two-stage urethroplasty is a more suitable technique for treating hypospadias with severe chordee after urethral plate transection. This retrospective study evaluated these two techniques. A total of 66 patients of proximal hypospadias with severe chordee were divided into two groups according to the techniques they underwent： 32 and 34 patients underwent single-stage （Duckett） or two-stage urethroplasty, respectively. Median ages at presentation were 7.5 years and 11.0 years in single-stage and two-stage repair groups, respectively. Median follow-ups were 28.5 months （20-60 months） and 35 months （18-60 months） in the single-stage and two-stage groups, respectively. The meatus of the neourethra was located at the top of the glans in all patients. No recurrence of chordee was found during follow-up, and all patients or parents were satisfied with the penile length and appearance. Complications were encountered in eight patients in both groups, with no statistically significant differences between the two techniques. The late complication rate of stricture was higher after the single-stage procedure （18.75% vs 0%）. The complication rate after single-stage repairs was significantly lower in the prepubescent subgroup （10.52%） than in the postpubescent cohort （46.15%）. These results indicate that the urethral plate transection effectively corrects severe chordee associated with proximal hypospadias during the intermediate follow-up period. Considering the higher rate of stricture after single-stage urethroplasty, two-stage urethroplasty is recommended for proximal hypospadias with severe chordee after urethral plate transection.

关键词： chordee proximal hypospadias single-stage urethroplasty two-stage urethroplasty

Expression of c-erbB-2 proto-oncogene in extrahepatic cholangiocarcinoma and its clinical significance

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Hepatobiliary & Pancreatic Diseases International 2007年第4期6卷 412-415页

作者： jun zheng and yao-Ming Zhu Department of General Surgery,First College of Clinical Medical Science of China Three Gorges University(Yichang Central People’s Hospital),Yichang 443003,China Department of General Surgery First College of Clinical Medical Science of China Three Gorges University (Yichang Central People's Hospital) Yichang 443003 China. zhengjun1995@***

BACKGROUND:Many investigators have indicated that overexpression and amplification of the human proto-oncogene c-erbB-2 is an independent prognostic factor for primary tumors. We studied expression of c-erbB-2 protein in tissues from extrahepatic cholangiocarcinoma,tissues peripheral to the carcinoma and normal bile ducts,and discussed the occurrence and development of extrahepatic cholangiocarcinoma. Another aim was to explore possible application of the c-erbB-2 gene for clinical diagnosis,pathological differentiation and treatment of extrahepatic cholangiocarcinomas. METHODS:The c-erbB-2 expression levels from 75 samples of extrahepatic cholangiocarcinoma,48 samples of tissues peripheral to the carcinoma and 9 samples from normal bile ducts were assayed by immunohistochemical streptavidinbiotin complex(SABC). RESULTS:The rates of c-erbB-2 expression in extrahepatic cholangiocarcinomas,tissues peripheral to the carcinomas,and normal bile ducts were 80%(60/75),56%(27/48),and 0%(0/9),respectively. In the extrahepatic cholangiocarcinomas,the expression of c-erbB-2 was directly proportional to the malignant grade and tumor metastasis. The expression rate of c-erbB-2 in tumors with nerve infiltration was significantly higher than in those without nerve infiltration. The expression rates of c-erbB-2 in tumors with histological grade Ⅲ/Ⅳ were significantly higher than in those with histological grade Ⅰ. The expression of c-erbB-2 was not correlated with the size or position of tumors,blood vessel infiltration or patients’ sex or age.-,CONCLUSIONS:c-erbB-2 was only expressed in extrahepatic cholangiocarcinomas and tissues peripheral to the carcinomas but not in normal bile ducts,indicating that c-erbB-2 may play an important role in the occurrence and development of extrahepatic cholangiocarcinoma. The fact that the expression level of c-erbB-2 was highly correlated with differentiation grade and metastasis of the tumor suggests potential clinical importance of c-erbB-2 a

关键词： cholangiocarcinoma c-erbB-2 gene expression

基于图形化测控的汽车自动变速器教学系统设计

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实验室研究与探索 2013年第5期32卷 242-246页

作者：吴君冯勇郑尧军浙江经济职业技术学院汽车技术学院浙江杭州310018

利用动力及负载变频电机真实模拟自动变速器的工况控制,实现了自动变速器的换挡规律切换。通过构建硬件下位机和软件上位机的控制与通信功能,设计了集"教、学、训、考、培"于一体的教学测控系统。测试结果表明,该教学测控系统真实还原... 详细信息

利用动力及负载变频电机真实模拟自动变速器的工况控制,实现了自动变速器的换挡规律切换。通过构建硬件下位机和软件上位机的控制与通信功能,设计了集"教、学、训、考、培"于一体的教学测控系统。测试结果表明,该教学测控系统真实还原自动变速器的换挡过程,实现了图形化界面的测控功能。

关键词：自动变速器图形化测控教学系统上下位机

面向车联网离散独立传感器节点电能信息挖掘与优化算法研究

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激光杂志 2016年第6期37卷 135-138页

作者：郑尧军冯勇浙江经济职业技术学院杭州310018

近年来对车联网的研究增多,标准化速度也明显加快。随着信息社会的发展,车载设备通信互联的需求明显增加。车载通信不同于传统通信,其传输环境时变性和空间变化都非常迅速,且受制于能源供应。本文基于神经网络模型提出了面向车联网信息... 详细信息

近年来对车联网的研究增多,标准化速度也明显加快。随着信息社会的发展,车载设备通信互联的需求明显增加。车载通信不同于传统通信,其传输环境时变性和空间变化都非常迅速,且受制于能源供应。本文基于神经网络模型提出了面向车联网信息的电能信息挖掘算法,可以基于大数据实现车载传感器相关信息的特征提取,并提供驾驶员优化的电能管理方案提高车辆续航时间。测试结果表明所提算法可以提取驾驶员驾驶特征并评估车辆续航能力。该算法未来可用于支持车联网的车载设备设计及智能交通系统中。

关键词：大数据优化控制车联网

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基于图形化电子油门巡航教学台架的研发

实验室研究与探索 2012年第3期31卷 59-62,67页

作者：吴君陈开考郑尧军浙江经济职业技术学院汽车技术学院浙江杭州310018

利用车速信号、发动机转速信号的模拟,实现了电子油门巡航仿真功能,并从硬件下位机和软件上位机对巡航教学系统进行了研究设计。

关键词：电子油门巡航图形化信号模拟

电喷系统在GS125摩托车发动机上的匹配应用

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农机化研究 2005年第5期27卷 237-239页

作者：郑尧军陈开考浙江经济职业技术学院汽车应用系杭州310018

减少有害排放物、提高动力性及经济性是环保和节约能源对摩托车发动机所提出的要求,而降低排放的最有效方法就是采用电喷技术。目前,国内采用电喷技术的摩托车还很少,仅有几家摩托车公司研制成功,但都未形成量产。为此,以GS125摩托车发... 详细信息

减少有害排放物、提高动力性及经济性是环保和节约能源对摩托车发动机所提出的要求,而降低排放的最有效方法就是采用电喷技术。目前,国内采用电喷技术的摩托车还很少,仅有几家摩托车公司研制成功,但都未形成量产。为此,以GS125摩托车发动机为研究对象,自主开发开环式电控系统对其进行改造、匹配标定。结果表明:GS125摩托车发动机电喷化后,动力性、经济性和排放都有明显改善。

关键词：能源与动力工程摩托车发动机应用电喷系统匹配