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| 1 | An improved empirical wavelet transform method for rolling bearing fault diagnosis显示文摘Empirical wavelet transform(EWT)based on the scale space method has been widely used in rolling bearing fault diagnosis.However,using the scale space method to divide the frequency band,the redundant components can easily be separated,causing the band to rupture and making it difficult to extract rolling bearing fault characteristic frequency effectively.This paper develops a method for optimizing the frequency band region based on the frequency domain feature parameter set.The frequency domain feature parameter set includes two characteristic parameters:mean and variance.After adaptively dividing the frequency band by the scale space method,the mean and variance of each band are calculated.Sub-bands with mean and variance less than the main frequency band are combined with surrounding bands for subsequent analysis.An adaptive empirical wavelet filter on each frequency band is established to obtain the corresponding empirical mode.The margin factor sensitive to the shock pulse signal is introduced into the screening of empirical modes.The empirical mode with the largest margin factor is selected to envelope spectrum analysis.Simulation and experiment data show this method avoids over-segmentation and redundancy and can extract the fault characteristic frequency easier compared with only scale space methods. | HUANG HaiRun LI Ke SU WenSheng BAI JianYi XUE ZhiGang ZHOU Lang SU Lei PECHT Michael | 2020 | Science China(Technological Sciences)2020，63，11： | 10 |
| 2 | An imine-linked covalent organic framework as the host material for sulfur loading in lithium–sulfur batteries显示文摘Lithium–sulfur(Li–S) batteries have high theoretical specific capacity, providing new opportunities for the next generation of secondary battery. Covalent organic framework(COF) as a new porous crystalline material has been used as the host material in Li–S battery to improve the cell's cycling stability. In this paper, an imine-linked TAPB-PDA-COF was applied as the host material for sulfur loading(60%) in Li–S battery. The TAPB-PDA-COF has a beehive-like morphology with high thermal stability(up to 500 ℃).In the electrochemical experiment, the performance of the composite cathode with acetylene black(AB) and super-P(S-P) as the conductive additives was studied individually. The initial discharge capacity under 0.2 A/g current density was 991 mAh/g and 1357 mAh/g for TAPB-PDA-COF/S@A-B and TAPB-PDACOF/S@S-P, respectively. The better result of S-P based cathode than A-B could be due to the better conductivity of the S-P, as proved by the EIS results. When further increased the current density to 2 A/g,the S-P based composite cathode can still deliver a comparable initial discharge capacity of 630 and 274 mAh/g capacity remained after 940 cycles. This results will inspire researchers develop more suitable conductive additives together with the host materials for high performance Li–S battery. | Jianyi Wang Liping Si Qin Wei Xujia Hong Ligui Lin Xin Li Jingyi Chen Peibiao Wen Yuepeng Cai | 2019 | Journal of Energy Chemistry2019，28，1： | 7 |
| 3 | Dendrite‐free lithium and sodium metal anodes with deep plating/stripping properties for lithium and sodium batteries显示文摘Although lithium(Li)and sodium(Na)metals can be selected as the promising anode materials for next‐generation rechargeable batteries of high energy density,their practical applications are greatly restricted by the uncontrollable dendrite growth.Herein,a platinum(Pt)–copper(Cu)alloycoated Cu foam(Pt–Cu foam)is prepared and then used as the substrate for Li and Na metal anodes.Owing to the ultrarough morphology with a threedimensional porous structure and the quite large surface area as well as lithiophilicity and sodiophilicity,both Li and Na dendrite growths are significantly suppressed on the substrate.Moreover,during Li plating,the lithiated Pt atoms can dissolve into Li phase,leaving a lot of microsized holes on the substrate.During Na plating,although the sodiated Pt atoms cannot dissolve into Na phase,the sodiation of Pt atoms elevates many microsized blocks above the current collector.Either the holes or the voids on the surface of Pt–Cu foam what can be extra place for deposited alkali metal,what effectively relaxes the internal stress caused by the volume exchange during Li and Na plating/stripping.Therefore,the symmetric batteries of Li@Pt–Cu foam and Na@Pt–Cu foam have both achieved long‐term cycling stability even at ultrahigh areal capacity at 20 mAh cm−2. | Jianyi Wang Qi Kang Jingchao Yuan Qianru Fu Chunhua Chen Zibo Zhai Yang Liu Wei Yan Aijun Li Jiujun Zhang | 2021 | Carbon Energy2021，3，1： | 6 |
| 4 | Why can soil maintain its endless eco-cycle? The relationship between the mechanical properties and ecological attributes of soil显示文摘Dear Editors,Why can soil maintain its endless eco-cycle to sustain the growth of plants?This mystery of nature can be resolved by revealing the relationship between the mechanical properties and ecological attributes of soil.Traditionally,soil science[1-3]is divided into two main categories:pedology and edaphology.In addition,soil mechanics addresses soil from the perspective of mechanics and engineering[4,5].However,no inherent | ZhiJian Yi ChaoHua Zhao JianYi Gu QingGuo Yang Ya Li Kai Peng | 2016 | Science China(Physics,Mechanics & Astronomy)2016，59，10： | 4 |
| 5 | Effect of loading on the Ni_2P/Al_2O_3 catalysts for the hydrotreating reactions显示文摘The 80%Ni2P/Al2O3 catalysts were prepared by the phosphidation of corresponding 80%Ni/Al2O3 with triphenylphosphine in liquid phase and compared with the 60%Ni2P/Al2O3 for hydrotreating reactions. Both the60%Ni2P/Al2O3 and 80%Ni2P/Al2O3 in comparison exhibited the small and uniform Ni2 P particles(6.3 and8.4 nm,respectively),high CO uptakes(305 and 345 μmol/g,respectively) and thus high activities for the hydrotreating reactions. After the hydrotreating reactions,the small and uniform Ni2 P particles were remained,although the CO uptakes on the used 60%Ni2P/Al2O3 and 80%Ni2P/Al2O3 were greatly decreased(to 68 and95 μmol/g,respectively) due to the incorporation of S into the Ni2 P surfaces. The 80%Ni2P/Al2O3 was found to be significantly more active than the 60%Ni2P/Al2O3 due to that the 80%Ni2P/Al2O3 possessed more,and more active Ni2 P sites than the 60%Ni2P/Al2O3,probably due to the less S incorporated in the 80%Ni2P/Al2O3 than in the 60%Ni2P/Al2O3 during the hydrotreating reactions. | Junen Wang Shaozhong Li Jun Xu Hui Chen Jiangyu Yuan Jianyi Shen | 2015 | Journal of Energy Chemistry2015，24，4： | 4 |
| 6 | Review of interface tailoring techniques and applications to improve insulation performance显示文摘Interfaces between different materials,for instance,electrode-dielectrics and vacuum/air/SF6‐insulators and oilpaper,are universal in high‐voltage insulation systems.Targeted tailoring of the interfacial properties,e.g.chemical structures,micro‐/nanoscale morphology,the charge injection barrier,trap states,and surface conductivity,is thought to be an effective approach to improve insulation properties such as breakdown and flashover strength,corona/tracking resistance,and wettability.In this article,the authors review recent progress in interface tailoring methods and their application to improve various insulation properties.The potential application scenarios of interface tailoring in different facilities are first summarised,and the desired insulation properties of various applications are highlighted.Interface tailoring methods are classified as physical/chemical surface modification and surface coating(inorganic,organic and composite),and the features of different techniques are described in detail.The structure-property relationships between interfacial states and various microscopic parameters such as charge injection barrier,trap distribution and surface conductivity are discussed together with the tailoring mechanisms for different insulation properties.Finally,the future development prospects of interface tailoring methods and their applications,e.g.multi-functional coating and stimuli-response smart coating,are presented. | Mingxiao Zhu Jianyi Xue Yanhui Wei Guochang Li Guanjun Zhang | 2022 | High Voltage2022，7，1： | 4 |
| 7 | Optical Waveguide Switches Employing Total-Internal-Reflection (TIR) Effect (Invited Paper)显示文摘In this paper, our recent research work on the total-internal-reflection optical switch is presented. The thermo-optic effect of polymeric materials and the photon-induced carrier effect of GaAlAs/GaAs are used in our devices. | Minghua Wang, Jianyi Yang, Xiaoqing Jiang, Xihua Li (Dept. of Information & Electronics Engineering, Zhejiang University, Hangzhou 310027, China) | 2003 | 光学学报2003，23，S1： | 3 |
| 8 | Decomposition and decoupling analysis of carbon dioxide emissions in African countries during 1984–2014显示文摘The potential for mitigating climate change is growing worldwide,with an increasing emphasis on reducing CO_(2)emissions and minimising the impact on the environment.African continent is faced with the unique challenge of climate change whilst coping with extreme poverty,explosive population growth and economic difficulties.CO_(2)emission patterns in Africa are analysed in this study to understand primary CO_(2)sources and underlying driving forces further.Data are examined using gravity model,logarithmic mean divisia index and Tapio's decoupling indicator of CO_(2)emissions from economic development in 20 selected African countries during 1984-2014.Results reveal that CO_(2)emissions increased by 2.11%(453.73 million ton)over the research period.Gravity centre for African CO_(2)emissions had shifted towards the northeast direction.Population and economic growth were primary driving forces of CO_(2)emissions.Industrial structure and emission efficiency effects partially offset the growth of CO_(2)emissions.The economic growth effect was an offset factor in central African countries and Zimbabwe due to political instability and economic mismanagement.Industrial structure and emission efficiency were insufficient to decouple economic development from CO_(2)emissions and relieve the pressure of population explosion on CO_(2)emissions in Africa.Thus,future efforts in reducing CO_(2)emissions should focus on scaleup energy-efficient technologies,renewable energy update,emission pricing and long-term green development towards sustainable development goals by 2030. | Claudien Habimana Simbi Jianyi Lin Dewei Yang Jean Claude Ndayishimiye Yang Liu Huimei Li Lingxing Xu Weijing Ma | 2021 | Journal of Environmental Sciences2021，33，4： | 3 |
| 9 | Effects of swirler position on flame response and combustion instabilities显示文摘This study is concerned with the experimental and theoretical investigation of the combustion instabilities in a premixed swirl combustor.It is focused on the effects of the swirl mixing distance on the intrinsic thermoacoustic mode.The swirler as an origin of the swirling flow is also the source of the flow disturbance,which has effects on the flame response.The location of the swirler is varied in the experiment to study the effect on combustion instabilities and flame transfer functions.A low order model is built to analyze the thermoacoustic instabilities of the combustion system.The experimental results show that the ITA switches from an unstable state to a stable state as the swirl mixing distance changes with an increment of 15 mm;while the instability of the quarter-wave mode is not varied.The measured Flame Transfer Functions(FTFs)show that the gain curves of the frequency-dependent FTFs seem to be stretched or compressed with the modulation of the swirler position,which has effects on frequencies and instabilities of thermoacoustic modes.With the low order model,the effects of flame response on combustion instabilities are analyzed and the flame dominant nature of the ITA mode is confirmed. | Liangliang XU Jianyi ZHENG Guoqing WANG Lei LI Fei QI | 2022 | Chinese Journal of Aeronautics2022，35，3： | 2 |
| 10 | Identifying human body states by using a flexible integrated sensor显示文摘Flexible sensors are required to be lightweight,compatible with the skin,sufficiently sensitive,and easily integrated to extract various kinds of body vital signs during continuous healthcare monitoring in daily life.For this,a simple and low-cost flexible temperature and force sensor that uses only two carbon fiber beams as the sensing layer is reported in this work.This simple,flexible sensor can not only monitor skin temperature changes in real time but can also extract most pulse waves,including venous waves,from most parts of the human body.A pulse diagnostic glove containing three such flexible sensors was designed to simulate pulse diagnostic methods used in traditional Chinese medicine.Wearable equipment was also designed in which four flexible sensors were fixed onto different body parts(neck,chest,armpit,and fingertip)to simultaneously monitor body temperature,carotid pulse,fingertip artery pulse,and respiratory rate.Four important physiological indicators—body temperature(BT),blood pressure(BP),heart rate(HR),and respiratory rate(RR)—were extracted by the wearable equipment and analyzed to identify exercise,excited,tired,angry,and frightened body states. | Ying Jin Guoning Chen Kete Lao Songhui Li Yong Lu Yufeng Gan Zhundong Li Jiajia Hu Jingcheng Huang Jinxiu Wen Honggui Deng Min Yang Zhiming Chen Xiaoyan Hu Baowen Liang Jianyi Luo | 2020 | npj Flexible Electronics2020，4，1： | 2 |
| 11 | Capture efficiency of coal/biomass co-combustion ash in an electrostatic field显示文摘Ash samples from corn stalk and coal co-fired at 0%,5%,10%,15%,20%,and 100%biomass were collected by a 4-stage wire-pipe type electrostatic precipitator (ESP),and the ratio of 14C/12C in ash samples from the 0%,20%,and 100% co-firing scenarios were measured by an accelerator mass spectrometer.The differential capture efficiency in electrostatic fields for coal ash,coal/biomass co-combustion ash (co- ash),and pure biomass ash was studied separately based on the ratio 14C/12C.Other factors that may influence capture efficiency were analyzed,including microscopic morphology,resistivity,dust density, and particle size distribution.The results indicate that co-ash may be efficiently captured by ESP,while pure biomass ash could not.Co-ash capture was mainly concentrated in the first two electrostatic fields in the lab-scale ESP,and the overall capture efficiency exceeded 90%.Biomass addition decreased the resistivity of co-ash,and enhanced its surface adsorption capacity to form agglomerates,facilitating the capture of co-ash.The capture efficiency of coal ash in co-ash was higher than that of pure coal ash in the first electrostatic field of the ESP.Co-firing biomass can aid the removal of both coal ash and biomass ash when using an ESP. | Jianyi Lu Lili Fu Ximei Li Eric Eddings | 2018 | Particuology2018，16，5： | 2 |
| 12 | Stress corrosion cracking of L360NS pipeline steel in sulfur environment显示文摘Slow strain rate test(SSRT)and tensile fracture observation are applied to study the stress corrosion cracking(SCC)of L360NS pipeline steel.5.0 wt.%sodium chloride solution containing elemental sulfur and 0.5 wt.%glacial acetic acid solution containing elemental sulfur are used.The results show that brittle fracture mainly occurs on the samples in high sulfur environment.In the sulfur suspension solution,the SCC sensitivity of L360NS pipeline steel increases along elemental sulfur content.In sulfur melting cladding condition,obvious corrosion can be observed with a large amount of corrosion pits appearing on the gauge section of the sample.The corrosion products are Fe1txS,black easily detached,and H2.In sulfur suspension and sulfur melting cladding conditions,stress oriented hydrogen induced cracking(SOHIC)is the main cracking,which is caused by the joint effect of SCC and hydrogen induced cracking(HIC). | Zhou Fan Xiaogang Hu Jianyi Liu Hongchuan Li Jinwen Fu | 2017 | Petroleum2017，3，3： | 2 |
| 13 | Ultrahigh Density Modulation of Aligned Single-Walled Carbon Nanotube Arrays显示文摘在圣切割石英上控制排列的围单人赛的碳 nanotube 数组(SWNT ) 的密度是在这些材料的各种各样的应用的关键步。然而为调节 SWNT 密度使用的生长机制化学蒸汽免职(CVD ) 方法仍然不好理解,阻止获得需要的结果的有效方法的发展。这里,我们报导完成的一条一般周期的途径超离频圣切割石英 substrateswith 密度上的 SWNT 数组的密度调整用改变 CH4 气体离开时间的一样的催化剂 densitiesby 与常规方法相比到多达 60 次增加了。这条途径对大量起始的催化剂密度,底层,催化剂类型和生长条件适用。我们为与不同的免费的碳集中联系的 SWNT 的催化剂尺寸依赖者成核建议一般机制,它解释所有观察。而且,模型的有效性被在周期的 CVD 途径包含关键参数的变化的系统的实验支持。 | Bin Wu Dechao Geng Yunlong Guo Liping Huang Jianyi Chen Yunzhou Xue Gui Yu Yunqi Liu Hisashi Kajiura Yongming Li | 2011 | Nano Research2011，4，10： | 1 |
| 14 | Internationalization of the “DPRK Defectors” Issue显示文摘Over the past 20 years,the 'DPRK Defectors' issue has become a security issue affecting China's relations with its neighbors.Not only does this issue exacerbate the conflict between North and South Korea and contribute to unrest on the peninsula,but it also causes diplomatic disputes that affect relations among the big powers in Northeast Asia and China's regional security. | Piao Jianyi Li Zhifei Xing Haibing | 2012 | Contemporary International Relations2012，22，5： | 1 |
| 15 | Terminal form and application choice of cold air distribution systems 显示文摘 | Li Li Jianyi Zhang | 2006 | Proceedings of The 3rd Asian Conference on Refrigeration and Air-conditioning2006，，2： | 1 |
| 16 | Photocatalytic degradation of dodecyl-benzenesulfonate over TiO2-Cu2O under visible irradiation显示文摘 | Han Chenghui Li Zhiyu Shen Jianyi | 2009 | Journal of Hazardous Materials2009，168，： | 1 |
| 17 | Thermally enhanced responsivity in an all-silicon optical power monitor based on defect-mediated absorption显示文摘We demonstrate a high responsivity all-silicon in-line optical power monitor by using the thermal effect to enhance the quantum efficiency of defect-mediated absorption at 1550 nm.The doping compensation technique is utilized to increase the density of lattice defects responsible for the sub-bandgap absorption and suppress the detrimental free carrier absorption.The 200-μm-long device presents a propagation loss as low as 2.9 d B/cm.Its responsivity is enhanced from 12.1 m A/W to 112 m A/W at-9 V bias by heating the optical absorption region.With this device,we build an optical power monitoring system that operates in the sampling mode.The minimal detectable optical power of the system is below-22.8 d Bm,while the average power consumption is less than1 m W at a sampling frequency of 10 Hz.Advantages of this scheme in terms of high responsivity,low insertion loss,and low power consumption lend itself to implement the feedback control of advanced large-scale silicon photonic integrated circuits. | QIKAI HUANG HUI YU QIANG ZHANG YAN LI WEIWEI CHEN YUEHAI WANG JIANYI YANG | 2021 | Photonics Research2021，9，11： | 1 |
| 18 | Research on Thermomechanical Stress of Long Nozzle and Improvement Measures显示文摘 | Wang Zhigang Li Nan Kong Jianyi | 2005 | Refractories Applications and News2005，10，1： | 1 |
| 19 | Research on thermomechanical stress of long nozzle and improvement measures显示文摘 | Wang Zhigang Li Nan Kong Jianyi | 2005 | Refractories Applications and News2005，10，1： | 1 |
| 20 | Prediction of properties of Al2O3-C refractory based on microstructure by an improved generalized self-consistent scheme显示文摘 | Zhigang Wang Jianyi Kong Yourong Li Nan Li | 2005 | Metallurgical and Materials Transactions B2005，，5： | 1 |
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