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THEORETICAL ANALYSES OF NON-CONTACT LINEAR MOTORS DRIVEN BY SURFACE ACOUSTIC WAVES

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THEORETICAL ANALYSES OF NON-CONTACT LINEAR MOTORS DRIVEN BY ...

Investigations on the Interactions between Li-TFSI and Glass Fibers in the Ternary PP/GF/Li-TFSI Composites

第三届全国压电和声波理论及器件技术研讨会

作者： huan-huan gu,Di MA,Shu-yi ZHANG,Li-ping CHENG,Xiu-ji SHUI Lab of Modern Acoustics,Institute of Acoustics,Nanjing University,Nanjing,Jiangsu 210093,China

In this article,theoretical analyses on the non-contact linear motors driven by surface acoustic waves(SAW) are presented,in which the sliders are driven by SAW stators through liquid *** theoretical results show that the velocity of the slider motion at the liquid layer surface is proportional to the vibration amplitude of the SAW and decreases exponentially with the thickness of liquid layer *** experimental results show that the slider velocity is proportional to the driving voltage of the SAW and decreases approximately exponentially with the thickness of the liquid layer *** the amplitude of the SAW is proportional to the driving voltage,it is demonstrated that the theoretical calculations are verified by the experimental results.

关键词： Ultrasonic motor surface acoustic wave acoustic streaming

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Chinese Journal of Polymer Science 2018年第1期36卷 113-118页

作者： Sen-Lin gu huan-huan Liu huan Cao Claude Mercier Yong-Jin Li College of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 310036China Solvay Co.Ltd shanghai 201100China

The polypropylene/glass fiber（PP/GF） composites with excellent antistatic performance and improved mechanical properties have been reported by incorporation of a very small amount of the organic salt, lithium bis（trifluoromethanesulfonyl）imide（Li-TFSI）, into the PP/GF composites. It was considered that GF could play the role as the pathways for the movements of ions in the ternary composites. In this work, the interactions between Li-TFSI and glass fiber and the effects of such interactions on the physical properties of the composites have been systematically investigated. Three types of glass fibers with different ―OH group concentrations have been prepared in order to compare the interactions between GF and Li-TFSI. It was found that the ―OH group concentrations on the surface of glass fiber have significant effects on interactions between glass fibers and Li-TFSI. Such interactions are crucial for both the antistatic and mechanical performances of the final PP/GF/Li-TFSI composites. The investigation indicated that the GF with high ―OH group concentrations confined the movement of TFSI-, which decreased the antistatic properties of PP/GF/Li-TFSI composites. On the other hand, the GF with low ―OH group concentrations inhibited the absorption of Li-TFSI onto the GF, which also hindered the formation of Li-TFSI conductive pathway. The best antistatic performance of the ternary composites can be achieved at the intermediate ―OH concentrations on the GF.

关键词： Polypropylene Glass fiber Li-TFSI Antistatic performance

Materials and surface engineering to control bacterial adhesion and biofilm formation： A review of recent advances

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Frontiers of Chemical Science and Engineering 2014年第1期8卷 20-33页

作者： huan gu Dacheng REN Department of Biomedical and Chemical Engineering Syracuse Biomaterials Institute Syracuse University Syracuse NY 13244 USA Department of Civil and Environmental Engineering Department of Biology Syracuse University Syracuse NY 13244 USA

Bacterial adhesion to surfaces and subsequent biofilm formation are a leading cause of chronic infections and biofouling. These processes are highly sensitive to environmental factors and present a challenge to research using traditional approaches with uncontrolled surfaces. Recent advances in materials research and surface engineering have brought exciting opportunities to pattern bacterial cell clusters and to obtain synthetic biofilms with well-controlled cell density and morphology of cell clusters. In this article, achievements in this field directions. we will review the recent and comment on the future

关键词： surface engineering materials bacterial adhesion biofilm control review

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唐山环城水系建设的调研与探究

唐山师范学院学报 2011年第5期33卷 111-114页

作者：贺文辉陶欢欢谷世海贾久满唐山师范学院生命科学系河北唐山063000

唐山环城水系的建设,对改善唐山市整体生态环境和推动城市改造、发展经济具有重大意义。通过问卷调查、统计分析的方法就唐山市环城水系建设中出现的相关问题、应该遵循的原则和思路以及进一步发展的方向和对策展开探讨,以期为唐山环城... 详细信息

唐山环城水系的建设,对改善唐山市整体生态环境和推动城市改造、发展经济具有重大意义。通过问卷调查、统计分析的方法就唐山市环城水系建设中出现的相关问题、应该遵循的原则和思路以及进一步发展的方向和对策展开探讨,以期为唐山环城水系的建设工作提供建议和参考。

关键词：环城水系相关问题对策

Deep feature extraction and motion representation for satellite video scene classification

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Science China(Information Sciences) 2020年第4期63卷 97-111页

作者： Yanfeng gu huan LIU Tengfei WANG Shengyang LI guoming GAO School of Electronics and Information Engineering Harbin Institute of Technology Technology and Engineering Center for Space Utilization Chinese Academy of Sciences The Key Laboratory of Space Utilization Chinese Academy of Sciences

Satellite video scene classification(SVSC) is an advanced topic in the remote sensing field, which refers to determine the video scene categories from satellite videos. SVSC is an important and fundamental step for satellite video analysis and understanding, which provides priors for the presence of objects and dynamic events. In this paper, a two-stage framework is proposed to extract spatial features and motion features for SVSC. More specifically, the first stage is designed to extract spatial features for satellite *** frames are firstly selected based on the blur detection and spatial activity of satellite *** the fine-tuned visual geometry group network(VGG-Net) is transferred to extract spatial features based on spatial content. The second stage is designed to build motion representation for satellite *** motion representation of moving targets in satellite videos is first built by the second temporal principal component of principal component analysis(PCA). Second, features from the first fully connected layer of VGG-Net are used as high-level spatial representation for moving targets. Third, a small network of long and short term memory(LSTM) is further designed for encoding temporal information. Two-stage features respectively characterize spatial and temporal patterns of satellite scenes, which are finally fused for SVSC.A satellite video dataset is built for video scene classification, including 7209 video segments and covering 8 scene categories. These satellite videos are from Jilin-1 satellites and Urthecast. The experimental results show the efficiency of our proposed framework for SVSC.

关键词： satellite videos classification convolutional neural network CNN long and short term memory LSTM motion representation

The Synthesis of Dialdehyde from Sodium Hydrogen Telluride with 1,1',3,3'-Tetramethyl-2,2'-bis-benzimidazolium Salt

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Chinese Chemical Letters 2002年第9期13卷 836-838页

作者： Yue, Ke Fen gu, huan Shi, Zhen Department of Chemistry Northwest University Xi'an 710069 China

The reaction of bis-benzimidazolium salts with sodium hydrogen telluride is reported, and a new synthetic method for dialdehydes is provided.

关键词： Bis-benzimidazolium salt sodium hydrogen telluride dialdehyde synthesis.

Porous rod-like Ni_(2)P/Ni assemblies for enhanced urea electrooxidation

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Nano Research 2021年第5期14卷 1405-1412页

作者： Qing Li Xinran Li Jiawei gu Yanle Li Ziqi Tian huan Pang School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou225009China guangling College Yangzhou UniversityYangzhou225009China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo315201China

The urea oxidation reaction has attracted increasing ***,porous rod-like Ni2P/Ni assemblies,which consist of numerous nanoparticle subunits with matching interfaces at the nanoscale have been synthesized via a simple phosphating *** functional theory calculations and density of states indicate that porous rod-like Ni2P/Ni assemblies can significantly enhance the activity of chemical bonds and the conductivity compared with NiO/Ni toward the urea oxidation *** optimal catalyst of Ni2P/Ni can deliver a low overpotential of 50 mV at 10 mA·cm−2 and Tafel slope of 87.6 mV·dec−1 in urea oxidation ***,the constructed electrolytic cell exhibits a current density of 10 mA·cm−2 at a cell voltage of 1.47 V and an outstanding durability in the two-electrode *** work has provided a new possibility to fabricate metal phosphides-metal assemblies with advanced performance.

关键词： rod-like Ni_(2)P/Ni electrocatalyst urea electrooxidation overall urea electrolysis

Cyber-attack Detection Strategy Based on Distribution System State Estimation

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Journal of Modern Power Systems and Clean Energy 2020年第4期8卷 669-678页

作者： huan Long Zhi Wu Chen Fang Wei gu Xinchi Wei Huiyu Zhan IEEE School of Electrical Engineering Southeast UniversityNanjingChina State Grid Shanghai Electric Power Company Electric Power Research InstituteShanghaiChina China Electric Power Research Institute BeijingChina

Cyber-attacks that tamper with measurement information threaten the security of state estimation for the current distribution *** paper proposes a cyber-attack detection strategy based on distribution system state estimation(DSSE).The uncertainty of the distribution network is represented by the interval of each state variable.A three-phase interval DSSE model is proposed to construct the interval of each state *** improved iterative algorithm(IIA)is developed to solve the interval DSSE model and to obtain the lower and upper bounds of the interval.A cyber-attack is detected when the value of the state variable estimated by the traditional DSSE is out of the corresponding interval determined by the interval *** validate the proposed cyber-attack detection strategy,the basic principle of the cyber-attack is studied,and its general model is *** proposed cyber-attack model and detection strategy are conducted on the IEEE 33-bus and 123-bus *** experiments of the proposed IIA,Monte Carlo simulation algorithm,and interval Gauss elimination algorithm prove the validation of the proposed method.

关键词： Cyber-attack detection distribution network interval state estimation distribution system state estimation cyber-attack model

StKU80, a component in the NHEJ repair pathway, is involved in mycelial morphogenesis, conidiation, appressorium development, and oxidative stress reactions in Exserohilum turcicum

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Journal of Integrative Agriculture 2021年第1期20卷 147-158页

作者： GONG Xiao-dong LIU Yu-wei BI huan-huan YANG Xiao-rong HAN Jian-min DONG Jin-gao gu Shou-qin State Key Laboratory of North China Crop Improvement and Regulation/Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology College of Life SciencesHebei Agricultural UniversityBaoding 071001P.R.China College of Plant Protection Hebei Agricultural UniversityBaoding 071001P.R.China Botou Vocational College Cangzhou 062150P.R.China

Homologous recombination(HR) and nonhomologous end joining(NHEJ) are considered the two main double-strand break(DSB) repair approaches in eukaryotes. Inhibiting the activities of the key component in NHEJ commonly enhances the efficiency of targeted gene knockouts or affects growth and development in higher eukaryotes. However, little is known about the roles of the NHEJ pathway in foliar pathogens. Here we identified a gene designated St KU80, which encodes a putative DNA end-binding protein homologous to yeast Ku80, in the foliar pathogen Exserohilum turcicum. Conserved domain analysis showed that the typical domains VWA, Ku78 and Ku-PK-bind are usually present in Ku70/80 proteins in eukaryotes and are also present in St Ku80. Phylogenetic analysis indicated that St Ku80 is most closely related to Ku80(XP001802136.1) from Parastagonospora nodorum, followed by Ku80(AGF90044.1) from Monascus ruber. Furthermore, the gene knockout mutants ΔSt KU80-1 and ΔSt KU80-2 were obtained. These mutants displayed longer septas, thinner cell walls, smaller amounts of substances on cell wall surfaces, and more mitochondria per cell than the wild-type(WT) strain but similar HT-toxin activity. The mutants did not produce conidia and mature appressoria. On the other hand, the mutants were highly sensitive to H2O2, but not to ultraviolet radiation. In summary, the St KU80 plays devious roles in regulating the development of E. turcicum.

关键词： Exserohilum turcicum pathogenicity gene knockout growth and development