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| 1 | On the viscosity of magnetic fluid with low and moderate solid fraction显示文摘The design of a pressurized capillary rheometer operating at prescribed temperature is described to measure the viscosity of magnetic fluids(MFs) containing Fe3O4 magnetic nanoparticles(MNPs).The equipment constant of the rheometer was obtained using liquids with predetermined viscosities.Experimentally measured viscosities were used to evaluate different equations for suspension viscosities.Deviation of measured suspension viscosities from the Einstein equation was found to be basically due to the influence of spatial distribution and aggregation of Fe3O4 MNPs.By taking account of the coating layer on MNPs and the aggregation of MNPs in MFs,a modified Einstein equation was proposed to fit the experimental data.Moreover,the influence of external magnetic field on viscosity was also taken into account.Viscosities thus predicted are in good agreement with experimental data.Temperature effect on suspension viscosity was shown experimentally to be due to the shear-thinning behavior of the MFs. | Zhiqiang Ren Yanping Han Ruoyu Hong Jianmin Ding Hongzhong Li | 2008 | Particuology2008，6，3： | 5 |
| 2 | RNA m^(6)A modification orchestrates a LINE-1-host interaction that facilitates retrotransposition and contributes to long gene vulnerability显示文摘The molecular basis underlying the interaction between retrotransposable elements(RTEs)and the human genome remains poorly understood.Here,we profiled N^(6)-methyladenosine(m^(6)A)deposition on nascent RNAs in human cells by developing a new method MINT-Seq,which revealed that many classes of RTE RNAs,particularly intronic LINE-1s(Lis),are strongly methylated. | Feng Xiong Ruoyu Wang Joo-Hyung Lee Shenglan Li Shin-Fu Chen Zian Liao Lana AI Hasani Phuoc T.Nguyen Xiaoyu Zhu Joanna Krakowiak Dung-Fang Lee Leng Han Kuang-Lei Tsai Ying Liu Wenbo Li | 2021 | Cell Research2021，31，8： | 1 |
| 3 | Experiments on plasma dynamics of electrical wire explosion in air显示文摘Besides a typical high‐density plasma source,electrical explosion of conductors is also indispensable in switches,nanomaterial synthesis,shock‐wave sources,etc.In this paper,an experimental study regarding plasma dynamics of electrical wire explosions(μs‐timescale)is presented,with spatiotemporal resolved diagnostics.Pure Cu/Ni wire and Cu‐Ni alloy wire were used and compared.The alloy wire usually has a higher resistivity,resulting in a higher initial energy deposition(heating)rate.Abel inverse transformation indicated that the plasma radiation focussed on the outer region of the discharge channel for the alloy wire.In addition,the metallic vapour determined by the material properties had a considerable influence on the plasma process and resulting nanomaterials.In particular,both transverse and axial‐layered structures were observed in alloy wire vapour.In addition,for the first time,the expanding arc‐like plasma of explosion products was understood and examined from aspects of material properties and energy relaxation.The later stage of wire explosion resembled the state of regular metal vapour arcs under 1 MPa pressure.Finally,the core factor for the fast energy deposition stage of wire explosion was ascertained.Correlations between pre‐exposition circuit parameters and post‐explosion dynamic effects were found,which is significant for practical applications. | Ruoyu Han Chen Li Wei Yuan Jiting Ouyang Jiawei Wu Yanan Wang Weidong Ding Yongmin Zhang | 2022 | High Voltage2022，7，1： | 1 |
| 4 | Review on HVDC cable terminations显示文摘With modern power utilities going green by utilising renewable energy technologies and the development of the smart power grid,high-voltage direct current(HVDC)technologies become more and more important in the energy transmission.In particular,HVDC cable systems play a prominent role in undersea power transmission and offshore renewable energy integration.As an essential part of a complete HVDC cable system,the cable termination is one of the most critical components.The mathematical and physical background of HVDC cable systems is discussed and the development of various types of HVDC cable terminations is reviewed.Regarding the non-uniform field distribution,the influence of temperature on the non-linear conductivity is briefly discussed.Furthermore,faults of terminations caused by inappropriate installation and testing of cable systems are discussed. | Hanyu Ye Tobias Fechner Xianzhang Lei Yi Luo Mingyu Zhou Zhengyi Han Haitian Wang Qikai Zhuang Ruoyu Xu Duo Li | 2018 | High Voltage2018，3，2： | 1 |
| 5 | Optimization Transmission Efficiency with Driver Intention for Automotive Continuously Variable Transmission under Slip Mode显示文摘This study proposes and experimentally validates an optimal integrated system to control the automotive continuously variable transmission(CVT)by Model Predictive Control(MPC)to achieve its expected transmission efficiency range.The control system framework consists of top and bottom layers.In the top layer,a driving intention recognition system is designed on the basis of fuzzy control strategy to determine the relationship between the driver intention and CVT target ratio at the corresponding time.In the bottom layer,a new slip state dynamic equation is obtained considering slip characteristics and its related constraints,and a clamping force bench is established.Innovatively,a joint controller based on model predictive control(MPC)is designed taking internal combustion engine torque and slip between the metal belt and pulley as optimization dual targets.A cycle is attained by solving the optimization target to achieve optimum engine torque and the input slip in real-time.Moreover,the new controller provides good robustness.Finally,performance is tested by actual CVT vehicles.Results show that compared with traditional control,the proposed control improves vehicle transmission efficiency by approximately 9.12%-9.35%with high accuracy. | Ling Han Hui Zhang Ruoyu Fang Hongxiang Liu | 2021 | Chinese Journal of Mechanical Engineering2021，34，5： | 1 |
| 6 | Unity Makes Strength:Constructing Polymeric Catalyst for Selective Synthesis of CO_(2)/Epoxide Copolymer显示文摘Catalyst design strategies such as bi-functional and di-nuclear catalysts have been developed based on intramolecular interactions,achieving excellent catalytic performance.However,most of these catalysts work in a state of disunity.To make progress in this direction,we reckoned that enhancing the neglected intermolecular interactions of these catalysts might be a suitable approach.Herein,we report a strategy of constructing homogeneous polymeric catalysts based on the philosophy of“unity makes strength”to convert the intermolecular interactions into stronger intramolecular interactions.We united discrete active centers of aluminum(Al)porphyrin and tertiary amine(methyl methacrylate;MMA)via a random copolymerization process into one polymer chain with the subsequent metallization using low-toxic metal AlEt_(2)Cl,to construct polymeric catalysts for selective copolymerization of CO_(2)/epoxide.The spatial confinement enabled the multiple interactions among the active centers,which was distinct from the“point-to-point”interacting systems such as binary,bi-functional,or di-nuclear complexes.Through detailed tuning of the multiple synergistic effects between porphyrin/porphyrin(metal synergistic effect)and Al porphyrin/tertiary amine(Lewis pair effect),the optimized polymeric catalyst showed significantly boosted catalytic activity of 4300 h^(−1),much higher than their mono-nuclear(∼0 h^(−1))and homo-polymeric(750 h^(−1))counterparts.Our present approach for designing polymeric catalysts based on multiple synergistic effects provides a platform for developing highly active catalysts. | Ruoyu Zhang Qingxian Kuang Han Cao Shunjie Liu Xuesi Chen Xianhong Wang Fosong Wang | 2023 | CCS Chemistry2023，5，3： | 0 |
| 7 | Observation and verification of surface electrical explosion driven by radial-distributed pulsed current in laboratory lightning strike test显示文摘The laboratory lightning test is essential for assessing the effectiveness of lightning strike protection(LSP).Particularly,direct lightning strike damage can be performed with pulsed current injection into the specimen.This paper focuses on the dynamic process of arc plasma and shock wave behaviour in the vicinity of the‘strike’point.A rod-plate discharge load is built for testing aluminium and coated plate under 40-kA-level pulsed current.The visualisation of the luminous discharge plasma and its flow field via high-speed photography(from different angles)is meticulously designed and implemented,synchronised with electro-physical diagnostics.The results indicate some new mechanisms for lightning strike damage,apart from the impulse heat loading from the thermal arc.The transient current injection through the arc root concentrates on a thin skin layer(skin-depth effect),with the radial-attenuated current density,driving asynchronously electrical explosions on the plate surface.The inhomogeneous Joule heating of the plate leads to outwardly propagating phase transition and shock wave along the conductive surface.In addition,the electro-thermal instability is observed and regarded as the seed of irregular erosion region.Spectroscopic information reveals two different plasma states of main discharge arc channel and adjacent surface electrical explosion.The correspondence of the physical mechanism of electrical explosion and optical radiation is established.Microscopic images for different regions depict erosion characteristics and summarise influencing factors,further confirming the mechanism above.The research clarifies the role of skin-depth effect in transaction arc erosion for electrode,complements the electrical explosion theory with unevenly distributed current and helps optimise strategies of LSP. | Ruoyu Han Yuchen Cao Yakun Liu Xi Chen Ting Li Chen Li Pengfei Li | 2024 | High Voltage2024，9，1： | 0 |
| 8 | Analyses on an electronic voltage transformer's failure by its resonance with very fast transient overvoltage and suppression显示文摘As voltage measuring devices are widely used in the high voltage power system with a primary-secondary-fusion structure,electronic voltage transformers are directly connected to the primary conductor and would face much more serious electromagnetic environments than general secondary equipment.As a result,they would still experience failures even when general protection measures are adopted to suppress overvoltages'amplitudes.To address this issue,an innovative method is proposed after analyses are conducted on the resonance between a transformer and an overvoltage.Within this method,an air-cored coil is installed in a transformer to artificially shift its natural frequency and to dodge the high-frequency dominant component of a transient overvoltage,avoiding the aforementioned resonance and suppressing the secondary overvoltage.In addition,simulations and laboratory tests are conducted to prove this method's validity. | Ruoyu Han Houda Zhu Qing Chen Hongbin Li Yue Tong Linshan Han Yang Jiao | 2024 | High Voltage2024，9，1： | 0 |
| 9 | Synergistic Co-doping effect of CNTs and PVP in Na_(4)MnCr(PO_(4))3 cathode as a strategy for improving the electrochemical performance of SIBs显示文摘In order to solve the contradiction between the rapidly growing energy demand and the excessive exploitation of fossil fuels,it is urgent to research and develops more environmentally friendly and efficient energy storage technologies.Therefore,the development of high-performance cathode materials to enhance the energy density of SIB is currently one of the most important topics of scientific research.Advanced high-voltage and low-cost cathode material for SIBs,a composite of carbon-coated Na_(4)MnCr(PO_(4))_(3)(NASICON-type),polyvinylpyrrolidone(PVP),and modified carbon nanotubes(CNTs)is prepared by sol-gel and freeze-drying method.Due to the high conductivity of CNTs,the conductivity of the composite is significantly improved,and its initial capacity is increased to 114 mAh/g at 0.5 C and 96 mAh/g at 5 C(Mn^(2+)/Mn^(4+)conversion for voltage windows 1.4-4.3 V).Moreover,the multi-electrons transfer of Cr^(3+)/Cr^(4+) and Mn^(2+)/Mn^(4+) can provide a high capacity of 165 mAh/g at 0.1 C and 102 mAh/g at 5 C in the high voltage window of 1.4-4.6 V.Furthermore,PVP can effectively inhibit the Jahn-Teller effect caused by Mn ion,making the composite have more excellent high-rate performance and stability.In addition,GITT,EIS and CV curves were drawn to better reveal the excellent kinetic properties of Na_(4)MnCr(PO_(4))_(3)@C@PVP@CNT cathode,and the mechanism of its performance improvement is deeply studied and discussed.Accordingly,the co-doping of CNTs and PVP is a simple way to high conductivity and fast charging of cathode materials for SIBs. | Ruoyu Chen Denys S.Butenko Shilin Li Xinyu Zhang Guangshe Li Igor V.Zatovsky Wei Han | 2024 | Chinese Chemical Letters2024，35，2： | 0 |
| 10 | Application of an atmospheric pressure plasma jet in a rat model of ischaemic stroke:Design,optimisation,and characteristics显示文摘Recent studies have shown the in vitro neuro-protective functions of atmospheric pressure plasma(APP)against multiple pathological injuries during ischaemic stroke(IS).However,whether APP treatment exerts a therapeutic effect on a rat IS model remains unclear.Here,on the basis of needle-to-ring dielectric barrier discharge,an atmospheric pressure plasma jet(APPJ)was designed,with the Helium as the working gas which was driven by a sinusoidal voltage.Then,the treatment conditions were optimised for IS rat model treatment and the characteristics of this APPJ were further diagnosed.Subsequently,the rat IS model was established through 90 min middle cerebral artery occlusion(MCAO),and plasma was intermittently inhaled by rats via the nasal cavity for a 2 min period at 60 min of MCAO process.The therapeutic effects of this plasma jet device were then evaluated using biomedical analyses.According to our results,intermittent APP inhalation in the MCAO rats increased the serum NO content,improved the neurological function,enhanced regional cerebral blood flow,lowered brain infarction,and reduced the cell apoptosis in brain tissues of MCAO rats.Collectively,our data provides a novel potential strategy for IS treatment by using atmospheric-pressure plasma inhalation. | Ye Chen Bingyan Yang Yuqing Liu Lixin Xu Zhongfang Shi Yixiao Liu Ruoyu Han Fang Yuan Jiting Ouyang Xu Yan Kostya(Ken)Ostrikov | 2023 | High Voltage2023，8，2： | 0 |
| 11 | Association Between the 313 bp Indel in Porcine POU1F1 Gene and Reproduction Traits显示文摘The study aims to analyze the distribution of the 313 bp indel(insertion/deletion termed as indel) in first intron of POU1F1 and it's association with reproduction traits in Sutai pigs by using the PCR-DSCP technique. The results showed that in this commercial pig population,the frequency of allele A was 0.6371,B was 0.3629;the genotype frequency of AA was 0.4516,AB was 0.3710,BB was 0.1774,and the χ2 test showed that the allele frequencies were in Hardy-Weinberg equilibrium. The SPSS GLM procedure was used to identify the association of the 313 bp indel with reproductive traits. In Sutai pigs,the pigs with AA genotype represented higher value in all reproduction traits,except for higher survival rate of piglets at weaning. Higher weaning weight was signifi cantly associated with AA genotype pigs and higher survival rate of piglets at weaning was signifi cantly associated with BB genotype(P<0.05) ,but no signif icant differences in other reproduction traits among genotypes were found(P>0.05) ;the P value of different traits affected by fi xed factors were not signif icant as well(P>0.05) . The result indicated that although this 313 bp indel was signifi cantly associated with the weaning weight and survival rate at weaning,no any association with major reproduction traits was observed in Sutai pigs. | WU Han SONG Chengyi GAO Bo TENG Shanghui WANG Xiaoyang LIU Ruoyu CAI Huifen | 2009 | Journal of Northeast Agricultural University(English Edition)2009，16，3： | 0 |
| 12 | Experiments on the characteristics of underwater electrical wire explosions for reservoir stimulation显示文摘Underwater shock waves generated by pulsed electrical discharges are an effective,economical,and environmentally friendly means of stimulating reservoirs,and this technology has received much attention and intensive research in the past few years.This paper reviews the main results of recent work on underwater electrical wire explosion(UEWE)for reservoir stimulation.Aplatform is developed for microsecond singlewire explosions in water,and diagnostics based on a voltage probe,current coil,pressure probe,photodiode,and spectrometer are used to characterize the UEWE process and accompanying shock waves.First,the UEWE characteristics under different discharge types are studied and general principles are clarified.Second,the shock-wave generation mechanism is investigated experimentally by interrupting the electrical energy injection into the wire at different stages of the wire-explosion process.It is found that the vaporization process is vital for the formation of shock waves,whereas the energy deposited after voltage collapse has only a limited effect.Furthermore,the relationships between the electrical-circuit and shock-wave parameters are investigated,and an empirical approach is developed for estimating the shock-wave parameters.Third,how the wire material and water state affect the wire-explosion process is studied.To adjust the shock-wave parameters,a promising method concerning energetic material load is proposed and tested.Finally,the fracturing effect of the pulsed-discharge shock waves is discussed,as briefly are some of the difficulties associated with UEWE-based reservoir stimulation. | Ruoyu Han Jiawei Wu Haibin Zhou Yongmin Zhang Aici Qiu Jiaqi Yan Weidong Ding Chen Li Chenyang Zhang Jiting Ouyang | 2020 | Matter and Radiation at Extremes2020，5，4： | 0 |
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