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| 1 | Electrical bearing failures in electric vehicles显示文摘In modern electric equipment,especially electric vehicles,inverter control systems can lead to complex shaft voltages and bearing currents.Within an electric motor,many parts have electrical failure problems,and among which bearings are the most sensitive and vulnerable components.In recent years,electrical failures in bearing have been frequently reported in electric vehicles,and the electrical failure of bearings has become a key issue that restricts the lifetime of all‐electric motor‐based power systems in a broader sense.The purpose of this review is to provide a comprehensive overview of the bearing premature failure in the mechanical systems exposed in an electrical environment represented by electric vehicles.The electrical environments in which bearing works including the different components and the origins of the shaft voltages and bearing currents,as well as the typical modes of electrical bearing failure including various topographical damages and lubrication failures,have been discussed.The fundamental influence mechanisms of voltage/current on the friction/lubrication properties have been summarized and analyzed,and corresponding countermeasures have been proposed.Finally,a brief introduction to the key technical flaws in the current researches will be made and the future outlook of frontier directions will be discussed. | Feng HE Guoxin XIE Jianbin LUO | 2020 | Friction2020，8，1： | 8 |
| 2 | Growth and characterization of 0.8-μm gate length AlGaN/GaN HEMTs on sapphire substrates显示文摘AlGaN/GaN high electron mobility transistor (HEMT) structures were grown on 2 inch sapphire substrates by MOCVD, and 0.8-μm gate length devices were fabricated and measured. It is shown by resistance mapping that the HEMT structures have an average sheet resistance of approximately 380 ?/sq with a uniformity of more than 96%. The 1-mm gate width devices using the materials yielded a pulsed drain current of 784 mA/mm at Vgs=0.5 V and Vds=7 V with an extrinsic transconductance of 200 mS/mm. A 20-GHz unity current gain cutoff frequency (?T ) and a 28-GHz maximum oscillation frequency (?max) were obtained. The device with a 0.6-mm gate width yielded a total output power of 2.0 W/mm (power density of 3.33 W/mm) with 41% power added efficiency (PAE) at 4 GHz. | WANG Xiaoliang WANG Cuimei HU Guoxin WANG Junxi RAN Junxue FANG Cebao LI Jianping ZENG Yiping LI Jinmin LIU Xinyu LIU Jian QIAN He | 2005 | Science in China(Series F)2005，48，6： | 7 |
| 3 | A'One Engine with Six Gears'System Engineering Methodology for the Economic Development of Unconventional Oil and Gas in China显示文摘Unconventional oil and gas resources have become the most important and realistic field for increasing China’s domestic oil and gas reserves and production.At present,the production scale does not match the massive amount of resources and the rapid growth of proven geological reserves.The challenges of technology,cost,management,and methodology restrict large-scale and economic development.Based on successful practices,a'one engine with six gears'system engineering methodology is put forward,which includes life-cycle management,overall synergy,interdisciplinary cross-service integration,marketoriented operation,socialized support,digitalized management,and low-carbon and green development.The methodology has been proved to be effective in multiple unconventional oil and gas national demonstration areas,including the Jimusar continental shale oil demonstration area.Disruptive views are introduced-namely,that unconventional oil and gas do not necessarily yield a low return,nor do they necessarily have a low recovery factor.A determination to achieve economic benefit must be a pervasive underlying goal for managers and experts.Return and recovery factors,as primary focuses,must be adhered to during China’s development of unconventional oil and gas.The required methodology transformation includes a revolution in management systems to significantly decrease cost and increase production,resulting in technological innovation. | Guoxin Li Chenggang Xian He Liu | 2022 | Engineering2022，，11： | 3 |
| 4 | Controllable Protein Adsorption and Bacterial Adhesion on Polypyrrole Nanocone Arrays显示文摘In this research, polypyrrole nanocone arrays doped with β-Naphthalene sulphonic acid(PPy-NSA) were built. This film was expected to control protein adsorption and bacterial adhesion by potential-induced reversibly redox. The scanning Kelvin probe microscopy(SKPM) and surface contact angles(SCA) tests suggested that the surface potential and wettability of PPy-NSA nanocone arrays could be controlled by simply controlling its redox property via applying potential. The controllable surface potential and wettability in return controlled the adsorption of protein and adhesion of bacteria. The proposed material might find application in the preparation of smart biomaterial surfaces that can regulate proteins and bacterial adhesion by a simple potential switching. | Zhengnan Zhou Weiping Li Tianrui He Peng Yu Guoxin Tan Chengyun Ning | 2016 | Journal of Materials Science & Technology2016，32，9： | 2 |
| 5 | In situ real-time study buckling behavior of boron nitride nanotubes with axial compression by TEM显示文摘Boron nitride nanotubes(BNNTs)were treated as brittle materials and could be used to enhance the composite mechanical properties.Many approaches were used to verify the theoretical prediction experimentally,but how to in situ real-time characterize nanomechanical properties of BNNTs was still interested to the researchers.An in situ transmission electron microscopy(TEM)equipped with a force transducer holder had been used to study the structure evolution behavior of BNNTs with axial compression.Real-time video and the force transducer had been used synchronously to record the whole force loading process where the mechanical deformation of BNNT began,buckled and ended with fracture.An in dividual ultrathin BNNT was employed to con duct the loading test.The results showed that the elastic deformation happened on the BNNT.Young's modulus?1.05-1.37 Tpa and elasticity coefficient?198.7-255.9 N/m of BNNT were calculated by Euler formula and Hooker's law,respectively. | Guoxin Chen Huanming Lu Junfeng Cui Haitao Yu Bo Wang Yan Liu He Li Nan Jiang | 2019 | Chinese Chemical Letters2019，30，7： | 2 |
| 6 | An analysis of major scientific problems and research paths of Gulong shale oil in Daqing Oilfield, NE China显示文摘After the preliminary basic research on the problems encountered during the production period of Gulong shale oil in the Songliao Basin, NE China, and the scientific exploration, the special characteristics of Gulong shale oil in terms of reservoir space, phase distribution, flow pattern, and mineral evolution are proposed. The main results are as follows :(1) The source of organic matter, mechanism of hydrocarbon generation and expulsion, and key factors affecting shale oil abundance;(2) The types and structural characteristics of the reservoir and their contribution to porosity and permeability;(3) The mineral origin and evolution of minerals and their influence on reservoir availability, sensitivity, and compressibility;(4) The rock mechanical characteristics and fracture propagation law of Gulong shale;(5) The shale oil products, phase change law and main control factors of adsorption and desorption conversion of Gulong shale oil;(6) The mechanism of shale oil-liquid, solid-liquid gas interaction and enhanced oil recovery. Three key research suggestions are proposed to realize the large-scale economic utilization of the Gulong shale oil as follows:(1) Deepen research on the mechanism of oil and gas generation and discharge, storage and transportation, to guide the selection of geological sweet spots of shale oil;(2) Deepen research on the compressibility and fracture initiation mechanism to support the selection of engineering sweet spots and optimization of engineering design;(3) Deepen research on the fluid interaction mechanism under reservoir conditions, os us to guide the optimization of development schemes and the selection of EOR technologies. A successful development of Gulong shale oil requires global experts and scholars to contribute multidisciplinary innovative ideas and technical ideas to solve production problems. | SUN Longde LIU He HE Wenyuan LI Guoxin ZHANG Shuichang ZHU Rukai JIN Xu MENG Siwei JIANG Hang | 2021 | Petroleum Exploration and Development2021，48，3： | 2 |
| 7 | An investigation of the thermal degradation of the intumescent coating containing MoO3and Fe203 显示文摘 | LI Guoxin YANG Junfen HE Tingshu | 2008 | Surf Coat Technol2008，202，： | 1 |
| 8 | An investigation of the thermal degradation of the intumescent coating containing MoO3 and Fe2O3显示文摘 | LI GUOXIN YANG JUNFEN HE TINGSHU | 2008 | Surface & Coatings Technology2008，202，： | 1 |
| 9 | An Investigation of the Thermal Degradation of the Intumescent Coating Containing MoO3 and Fe2O3显示文摘 | Lin Guoxin Yang Junfen He Tingshu | 2008 | Surface & Coatings Technology2008，202，： | 1 |
| 10 | Petroleum Instrument Development in China显示文摘 | He Guoxin(Xi’an Petroleum Exploration Instrument Complex, CNPO) | 1998 | China Oil & Gas1998，5，1： | 1 |
| 11 | Effects of EG and MoSi2 on thermal degradation of intumescent coating 显示文摘 | Li Guoxin Liang Guozheng He Tingshu | 2007 | Polymer Degradation and Stability2007，92，4： | 1 |
| 12 | Effects of two retarders on the fluidity of pastes plasticized with aminosulfonicacid-based superplasticizers显示文摘 | LI Guoxin HE Tingshu HU Dawei | 2012 | Construction and Building Materials2012，26，： | 1 |
| 13 | Effects of retarders on thefluidity of pastes containingβ-naphthalenesulfonic acidbasedsuperplasticizer显示文摘 | LI Guoxin HE Tingshu HU Dawei | 2012 | Advances in Cement Research2012，24，4： | 1 |
| 14 | Color temperature tuna- ble white-light light-emitting diode dusters with high color rendering index 显示文摘 | He Guoxin Zheng Lihong | 2010 | Applied Optics2010，49，24： | 1 |
| 15 | White light LED clus- ters with high color rendering显示文摘 | He Guoxin Zheng Lihong | 2010 | Optics Letters2010，35，17： | 1 |
| 16 | Spectral optimization of the color temperature tunable white light-emitting diode (LED) cluster consisting of di- rect-emission blue and red LEDs and a diphosphor conversion LED显示文摘 | Zhong Ping He Guoxin Zhang Minhao | 2012 | Optics Express2012，20，5： | 1 |
| 17 | Gastroenteritis Outbreak Caused by Campylobacter jejuni — Beijing, China, August, 2019显示文摘Summary What is already known about this topic?Campylobacter genus bacteria are recognized as some of the leading causes of the bacterial diarrheal illness in both developing and developed countries.Recent pilot surveillance study revealed Campylobacter is the most common pathogen in the diarrheal cases using the enhanced filtration methods in Beijing.One outbreak caused by multi-drug resistant Campylobacter coli(C.coli)was identified in 2018. | Ying Li Guilan Zhou Peng Gao Yixin Gu Hairui Wang Shuang Zhang Yanchun Zhang Yuanyuan Wang Hongbo Jing Chao He Guoxin Zhen Hongmei Ma Yindong Li Jianzhong Zhang Maojun Zhang | 2020 | China CDC weekly2020，2，23： | 1 |
| 18 | Spectral Optimization of phos- phor-coated white LEDs for color rendering and lu- minous efficacy显示文摘 | He Guoxin Tang Ju | 2014 | Photonics Technology Letters2014，26，14： | 1 |
| 19 | Effects of EG and MoSi2 on thermal degradation of intumescent coating显示文摘 | Li Guoxin Liang Guozheng He Tingshu | 2007 | Polymer Degradation and Stability2007，92，4： | 1 |
| 20 | Expression of an Arabidopsis vacuolar sodium/proton antiporter gene in cotton improves photosynthetic performance under salt conditions and increases fiber yield in the field显示文摘 | Cixin He Juqiang Yan Guoxin Shen | 2005 | Plant Cell Physiol2005，45，11： | 1 |
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