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| 1 | Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia显示文摘A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH_3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns(XRD), Scanning electron microscopy(SEM), Transmission electron microscopy(TEM), N_2 sorption-desorption, nuclear magnetic resonance(NMR), Inductively Coupled Plasma-Atomic Emission spectrometer(ICP-AES), X-ray absorption spectroscopy(XPS),Temperature-programmed desorption of ammonia(NH_3-TPD), Ultraviolet visible diffuse reflectance spectroscopy(UV-Vis DRS) and Temperature programmed reduction(TPR).The analysis results indicate that the high activities of Cu-SAPO-34 catalysts could be attributed to the enhancement of redox property, the formation of mesopores and the more acid sites. Furthermore, the kinetic results verify that the formation of mesopores remarkably reduces diffusion resistance and then improves the accessibility of reactants to catalytically active sites. The 1.0-Cu-SAPO-34 catalyst exhibited the high NO conversion(> 90%) among the wide activity temperature window in the range of 150–425℃. | Jixing Liu Fuhong Yu Jian Liu Lifeng Cui Zhen Zhao Yuechang Wei Qianyao Sun | 2016 | Journal of Environmental Sciences2016，28，10： | 8 |
| 2 | The earthquake precursor detected in a granular medium and a proposed model for the propagation of precursive stress-strain signal显示文摘A way to detect the seismic precursor in granular medium is described and a model of propagation for precursive stress-strain signals is proposed.A strain sensor buried in a sandpit is used to measure a seismic precursor signal.The signal has been investigated and confirmed to originate from a specific earthquake.A comparison of simulated and experimental signals indicates that the signal results from the strain in the earth's strata.Based on the behavioral characteristics of granular materials,an analysis of why this method can be so sensitive to the seismic strain signal is undertaken and a model for the propagation of this stress-strain signal is proposed.The Earth's lithosphere is formed of tectonic plates,faults and fault gouges at their boundaries.In the case of the quasi-static mechanics of seismic precursory stress-strain propagation,the crustal lithosphere should be treated as a large-scale granular system.During a seismogenic event,accumulated force generates the stick-slip motion of adjacent tectonic plates and incrementally pushes blocks farther apart through stick-slip shift.The shear force released through this plate displacement causes soil compression deformation.The discrete properties of the sand in the sandpit lead to the sensitive response of the sensor to the deformation signal which enables it to detect the seismic precursor.From the analysis of the mechanism of the stress-strain propagation in the lithosphere,an explanation is found for the lack of signal detection by sensors installed in rocks.The principles and method presented in this paper provide a new technique for investigating seismic precursors to shallow-source earthquakes. | LU KunQuan HOU MeiYing WANG Qiang PENG Zheng SUN Wei SUN XiaoMing WANG YuYing TONG XiaoHui JIANG ZeHui LIU JiXing | 2011 | Chinese Science Bulletin2011，56，11： | 2 |
| 3 | Leakage current characteristics and ageing assessment technology of roof arrester under ultra harmonics overvoltage显示文摘The large leakage current of the roof arrester caused by the high‐frequency resonant overvoltage on the high‐speed train occurs intermittently,which will cause the arrester to overheat locally.In this work,the overheating issue of the arrester under Ultra Harmonics Overvoltage is studied.Then,the relationship between the active power and the voltage(including amplitude and frequency)of the arrester is investigated,and the impact mechanism of the harmonic voltage on the overheating fault of the arrester is analysed based on experiments in this work.It is found that the total leakage current of the arrester is proportional to the amplitude and frequency of the applied voltage.The internal resistance of the arrester is independent of the amplitude of the voltage,but it will decrease with the increase of the frequency.The main reason that leads to thermal breakdown of the arrester valve under high‐frequency harmonic voltage is the heating power elevation of the arrester valve.The research study can provide theoretical basis and data support for the design,type selection and monitoring of the high‐speed train roof arrester. | Jixing Sun Fan Ding Yunlong Lv Jiayi Ren Sibo Song Tiance Li Qingyun Zhi Changwang Guo | 2022 | High Voltage2022，7，2： | 1 |
| 4 | Finite element modeling for cathodic protection of pipelines under simulating thermocline environment in deep water 显示文摘 | LI CHENGJIE DU MIN SUN JIXING | 2013 | Electrochemical Society2013，169，9： | 1 |
| 5 | Pollution accumulation on rail insulator in high-speed aerosol显示文摘 | Sun Jixing Gao Guoqing Zhou Lijun | 2013 | IEEE Transactions on Dielectrics and Electrical Insulation2013，20，3： | 1 |
| 6 | Pollution accumulation on rail insulator in highspeedaerosol显示文摘 | SUN Jixing GAO Guoqiang ZHOU Lijun | 2013 | IEEE Transactions on Dielectrics andElectrical insulation2013，20，3： | 1 |
| 7 | Metal particle movement and distribution characteristics under AC voltage and ballplane electrodes显示文摘Metal particles,difficult to be eliminated in gas-insulated metal-enclosed switchgear(GIS),can cause GIS discharge and breakdown between electrodes,or flashover on the insulator surface.It influences the development of ultra-high voltage(UHV)projects.Therefore,the work optimised the model of metal particle movement under AC voltage,studying the metal particle movement and distribution characteristics between ball-plane electrodes through experiment and simulation.Under AC voltage,the particle jumps on a small scale on the plane surface.With the increase of voltage,the jump amplitude increases.However,the collision frequency decreases until the particle collides with the ball electrode.When the initial phase angle of power changes,the particle-moving pattern is symmetrical in the angle ranging from 0 to 180°,and from 180 to 360°.The collision frequency changes slightly with the increase of jump amplitude when the angel ranges from 0 to 120°. | Jixing Sun Lei Sun Weijiang Chen Zhibing Li Xianglian Yan Yuan Xu | 2019 | High Voltage2019，4，2： | 1 |
| 8 | Development of Ti-26Nb-1.2TiC shape memory composite for biomedical applications显示文摘Ti-Nb alloys have great potential in biomedical applications as bone-implant materials due to their low elastic modulus,superelasticity,high corrosion resistance,and good biocompatibility.However,the low yield strength and poor superelasticity of Ti-Nb alloys restrict their practical clinical applications.Here,we report the mechanical properties and superelasticity,corrosion behavior,and biocompatibility of a Ti-26 at.%Nb-1.2 vol.%TiC(Ti-26Nb-1.2TiC)shape memory composite(SMC)prepared by vacuum arc melting and hot rolling.The yield strength,critical stress for inducing martensitic transformation,and elongation of the Ti-26Nb-1.2TiC SMC and a Ti-26Nb alloy were 460 and 337 MPa,251 and 115 MPa,and 27.2%and 24.1%,respectively.The recovery rate of the SMC under 4%pre-strain reached 91.4%,which was 1.2 times that of the Ti-26Nb.Electrochemical tests in Hanks’solution revealed that the corrosion current density,passive current density,and corrosion rate of the SMC were lower than those of the Ti-26Nb.Both the Ti-26Nb alloy and Ti-26Nb-1.2TiC SMC showed good cell viability with grade 0 cytotoxicity in relation to MG-63 osteosarcoma cells. | Quanxiang Sun Dechuang Zhang Xian Tong Jianguo Lin Jixing Lin Yuncang Li Cuie Wen | 2023 | Journal of Materials Science & Technology2023，，22： | 0 |
| 9 | Pharmacokinetics of Enrofloxacin and Its Metabolite in Carp (Cyprinus carpio) After a Single Oral Administration in Medicated Feed显示文摘A precise and reliable analytical method of high performance liquid chromatography-tandem mass spectrometry(HPLCMS/MS)was developed to measure trace levels of enrofloxacin(ENR)and its major metabolite ciprofloxacin(CIP)in carp tissues.Optimized chromatographic separation was obtained on a Waters Xterra MS C_(18) reversed-phase column using gradient elution with methanol and 0.1%formic acid aqueous solution including 5mmolL^(-1) of ammonium acetate.The established method was applied to study the pharmacokinetics and distribution of ENR and CIP in tissues of carp following a single oral administration in feed at a dosage of 40mgkg^(-1) bw(body weight).Data were analyzed using DAS 2.0 dynamics software,and the experimental results suggest that ENR was rapidly absorbed and extensively distributed in carp tissues through systemic circulation,and the pharmacokinetic characteristics can be described with a two-compartment model.The elimination half-lives(t_(1/2β))from muscle,liver,gill,plasma and skin were 131,160,104,132 and 310 h,respectively.The areas under the drug concentration-time curves(AUC)for these tissues were 491,972,750,249 and 706hmgkg^(-1),respectively.The maximum concentration(C_(max))values were 13,29,37,9 and 5mgkg^(-1) with peak times(t_(max))of 8,4,4,2 and 4 h,respectively.Ciprofloxacin,the active metabolite of ENR,was also detected in carp tissues,indicating that only 1.54%of de-ethylation of ENR occurs in carp.At a water temperature of 18℃,the drug withdrawal time was determined to be no less than 24 d while the carp was fed at a single dosage of 40mgkg^(-1). | LIU Ying LI Zhaoxin ZHANG Dahai XING Lihong SUN Weihong SUN Xiaojie PENG Jixing ZHANG Yonggang LI Xianguo | 2023 | Journal of Ocean University of China2023，22，1： | 0 |
| 10 | Study on the Management System of Enterprise's Scientific and Technical Innovation显示文摘 | Jixing Yu Muyou Sun | 2004 | China-USA Business Review2004，3，2： | 0 |
| 11 | A new species of Leodamas Kinberg, 1866 (Polychaeta: Orbiniidae) from the Yellow Sea and the East China Sea显示文摘Based on polychaete specimens collected from coastal areas of China in 1959,a new species of the family Orbiniidae,Leodamas sinensis sp.nov.is described in the present paper.The new species can be distinguished from its cogeners by the combination of following characters:branchiae present from chaetiger 5;each thoracic neuropodial postchaetal lobe possessing broad tori,with a digital to triangular-shaped papilla at its midlength;4 or 5 vertical rows of uncini and one posterior row of accompany capillaries in thoracic neuropodia;acicula present in both abdominal notopodia and neuropodia,slightly or distinctly projecting.A key to all known species of the genus is provided. | SUN Yue SUI Jixing LI Xinzheng | 2018 | Acta Oceanologica Sinica2018，37，10： | 0 |
| 12 | Exploring Sulfur Chemistry in TMC-1 with NSRT显示文摘There have been several studies on sulfur depletion in dense cores like TMC-1(Taurus Molecular Cloud 1),employing updated reaction networks for sulfur species to explain the missing sulfur in the gas within dense clouds.Most of these studies used a C/O ratio of 0.7 or lower.We present NSRT(NanShan 26m Radio Telescope)observations of TMC-1 alongside results from time-dependent chemical simulations using an updated chemical network.Our findings highlight the impact of the C/O ratio on the gas-phase evolution of C2S and C3S.The simulation results show that the C/O ratio is an important parameter,playing a fundamental role in determining the gas-phase abundances of sulfur species in dense cores. | Wasim Iqbal Xiaohu Li Juan Tuo Ryszard Szczerba Yanan Feng Zhenzhen Miao Jiangchao Yang Jixing Ge Gleb Fedoseev Donghui Quan Qiang Chang Chuan-Lu Yang Tao Yang Gao-Lei Hou Yong Zhang Xuan Fang Xia Zhang Fangfang Li Rong Ma Xiaomin Song Zhiping Kou Yuxuan Sun | 2024 | Chinese Physics Letters2024，41，2： | 0 |
| 13 | Geoacoustic inversion in shallow water by matching the vertical-particle-velocity显示文摘Bottom acoustic parameters are vital for studying sound propagation properties and their applications in ocean waveguides.The propagation properties and normal-mode structure of vertical-particle-velocity in an ocean environment with a thermocline in shallow water were studied in the Yellow Sea.The Results reveal that high energy of the verticalparticle-velocity exists at most depth except for near-bottom depth when the source and receiver are both below the thermocline.Moreover,high-order modes contribute more to the verticalparticle-velocity and vertical-particle-velocity-based matched-field-processing(MFP)inversion method can be highly sensitive to bottom parameters compared to sound pressure.Furthermore,the effects of the bottom absorption coefficient on the vertical-particle-velocity-based MFP inversion method are studied.It is shown that accurate sound velocity,density and water depth can be obtained only when the bottom absorption coefficient is set close to the real value during MFP.By using the vertical-particle-velocity signals recorded by vector hydrophones during the experiment and determining the bottom sound velocity,bottom density and water depth under different bottom absorption coefficients,stable inversion results were obtained.The transmission losses of the sound pressure at different ranges were used to invert the bottom absorption coefficients.The transmission losses of sound pressure calculated using the inverted bottom parameters are consistent with the experimental results obtained from the pressure hydrophones in the experiment. | TAN Peng SUN Mei QIN Jixing YANG Desen | 2023 | Chinese Journal of Acoustics2023，42，3： | 0 |
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