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| 1 | Research on a novel composite gel system for CO_2 breakthrough显示文摘A composite gel was prepared for plugging CO2 channeling, which is a serious problem for enhanced oil recovery with CO2. A composite gel which is one of the materials for successful control of CO2 channeling during CO2 injection process was studied in this paper. SEM and nano particle size analysis were used to describe this material’s microstructure. Its effect on CO2 channeling control was evaluated with core flow experiments. Both the rheological test and core plugging experiments indicated that both acrylamide monomer concentration and reaction pressure had positive influences on gel properties. The gel system with an acrylamide monomer concentration of 2% and 5% sodium silicate was proved to have excellent strength, elastic and plugging efficiency, which confirmed huge development potential and wide application of the composite gel system. The high-pressure acid environment arising from the CO2 injection not only reacts with solid silicate to form silicic acid gel, but also facilitates efficient polymerization. | Hou Yongli Xiang'an | 2010 | Petroleum Science2010，7，2： | 7 |
| 2 | Stability and water control of nitrogen foam in bulk phase and porous media显示文摘Foam is widely used in the petroleum industry thanks to its unique properties and performance. Its application to water control in oil wells has received more and more attention. The stability of nitrogen foam was investigated in pressurized equipment and sand pack. The result indicated that with increasing pressure (0-2 MPa) the stability of foam in the pressurized equipment increased linearly. Increased nitrogen injection pressure caused better dispersion of nitrogen-foaming solution in porous media. The initial residual resistance factor to gas was an exponential function of injection pressure, but the residual resistance factor (to gas and liquid) decreased exponentially with time. The half- life of foam in porous media (expressed in residual resistance factor) was much longer than that in bulk phase (expressed in foam height). Pore model analysis indicated that good dispersion in porous media and the presence of thick liquid fi lm during dispersion were the main reasons for high stability. Field test indicated that effective residence of foam in the formation not only resulted in much better heat insulation, but also improved steam stimulation by enhancing steam heating. | Zhao Renbao Hou Yongli Ke Wenqi Yue Xiang'an | 2009 | Petroleum Science2009，6，2： | 5 |
| 3 | FeNi nanoparticles on Mo_(2)TiC_(2)T_(x)MXene@nickel foam as robust electrocatalysts for overall water splitting显示文摘The development of cost-effective electrocatalysts for overall water splitting is highly desirable,remaining a critical challenge at current stage.Herein,a class of composite FeNi@MXene(Mo_(2)TiC_(2)T_(x))@nickel foam(NF)has been synthesized through introducing Fe2+ions and in-situ combining with surface nickel atoms on nickel foam.The obtained FeNi@Mo_(2)TiC_(2)T_(x)@NF exhibited high activity with overpotentials of 165 and 190 mV for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)at a current density of 10 mA·cm^(-2),respectively.The synergetic effects of Mo_(2)TiC_(2)T_(x)and FeNi nanoalloys lead to increasing catalytic activities,where MXene provides high active surface area and rich active sites for HER,and FeNi nanoalloys promote the OER.Theoretical simulation of electron exchange capacity between FeNi and MXene in FeNi@Mo_(2)TiC_(2)T_(x)catalyst shows that electrons transferred from surface Mo atoms to the interface between FeNi and MXene,indicating that the electrons are accumulated near the FeNi nanoparticles.This kind of electronic distribution facilitates the formation of intermediate of NiOOH.Correspondingly,(H++e-)is more inclined onto Mo-Ni interfaces for HER.The Gibbs free energy changes for H*to HER and potential-limiting step for-OOH intermediate in OER over FeNi@Mo_(2)TiC_(2)T_(x)are much less than those on bare MXene.The catalyst can be further used for overall water splitting in alkaline solution,realizing a current density of 50 mA·cm^(-2)at 1.74 V.This work provides a facile strategy to achieve efficient and cheap catalysts for new energy production. | Jiayang Wang Peilei He Yongli Shen Linxiu Dai Zhe Li Yue Wu Changhua An | 2021 | Nano Research2021，14，10： | 5 |
| 4 | PrP mutants with different numbers of octarepeat sequences are more susceptible to the oxidative stress显示文摘One of the physiological functions of cellular prion protein(PrP C )is believed to work as a cellular resistance to oxidative stress,in which the octarepeats region within PrP plays an important role.However,the detailed mechanism is less clear.In this study,the expressing plasmids of wild-type PrP (PrP-PG5)and various PrP mutants containing 0(PrP-PG0),9(PrP-PG9)and 12(PrP-PG12)octarepeats were generated and PrP proteins were expressed both in E.coli and in mammalian cells.Protein aggregation and formation of carbonyl groups were clearly seen in the recombinant PrPs expressed from E.coli after treatment of H2O2.MTT and trypan blue staining assays revealed that the cells expressing the mutated PrPs within octarepeats are less viable than the cells expressing wild-type PrP.Statistically significant high levels of intracellular free radicals and low levels of glutathione peroxidase were observed in the cells transfected with plasmids containing deleted or inserted octarepeats.Remarkably more productions of carbonyl groups were detected in the cells expressing PrPs with deleted and inserted octarepeats after exposing to H2O2.Furthermore,cells expressing wild-type PrP showed stronger resistant activity to the challenge of H2O2 at certain extent than the mutated PrPs and mock. These data provided the evidences that the octarepeats number within PrP is critical for maintaining its activity of antioxidation.Loss of its protective function against oxidative stress may be one of the possible pathways for the mutated PrPs to involve in the pathogenesis of familial Creutzfeldt-Jacob diseases. | AN Run1 ,2,DONG ChenFang 2,LEI YanJun 1,2,HAN Lu 2,LI Ping 2,CHEN JianMing 2,WANG GuiRong 2, SHI Qi 2 ,GAO Chen 2 ,JIANG HuiYing 2 ,ZHOU Wei 2 ,HAN Jun 2 ,CHU YongLie 1 ,DONG XiaoPing 2 1School of Medicine,Xi’an JiaoTong University,Xi’an 710061,China 2State Key Laboratory for Infectious Disease Prevention and Control,National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention,YingXin Rd 100,Beijing 100052,China | 2008 | Science China(Life Sciences)2008，51，7： | 3 |
| 5 | Multi-band spectrum auction framework based on location information in cognitive radio networks显示文摘Cognitive radio(CR) technology is considered to be an effective solution to allocate spectrum resources,whereas the primary users of a network do not fully utilize available frequency bands.Spectrum auction framework has been recognized as an effective way to achieve dynamic spectrum access.From the perspective of spectrum auction,multi-band multi-user auction provides a new challenge for spectrum management.This paper proposes an auction framework based on location information for multi-band multi-user spectrum allocation.The performance of the proposed framework is compared with that of traditional auction framework based on a binary interference model as a benchmark.Simulation results show that primary users will obtain more total system revenue by selling their idle frequency bands to secondary users and the spectrum utilization of the proposed framework is more effective and fairer. | Yongli An Yang Xiao Guangzhi Qu | 2012 | Journal of Systems Engineering and Electronics2012，23，5： | 2 |
| 6 | LB energy-saving high temperature shift catalyst and its adsorption thermodynamics显示文摘 | Lingchao Wei Fu’An Wang Yi Liu Yongli Chai | 2009 | Korean Journal of Chemical Engineering2009，，1： | 1 |
| 7 | Motion estimation based on the energy flow显示文摘By taking pixels of image sequences as moving gas molecules, a novel concept, image temperature, is proposed to describe the natural property of the image motion. The idea comes from the revelation of the Maxwell-Boltzmann Distribution Law in gas dynamic theories. Furthermore, another concept of energy flow corresponding to the optical flow is developed, and the method of the energy flow equation (EFE) is established to estimate image motion. The experiment indicates a better performance of the proposed EFE scheme with significantly reduced false motion estimates when compared to the traditional optical flow equation (OFE). | ZHANG Zhongwei, LIU Guizhong, LI Hongliang and LI Yongli(School of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China) | 2003 | Progress in Natural Science:Materials International2003，13，3： | 1 |
| 8 | Physical study on the vibrated packing densification of mono-sized cylindrical particles显示文摘 | Quan Qian Xizhong An Yang Wang Yongli Wu Lin Wang | 2016 | Particuology2016，14，6： | 1 |
| 9 | MRF based construction of statistical operator and its application显示文摘Based on the Markov random field (MRF) theory, a new nonlinear operator is defined according to the statistical information in the image, and the corresponding 2D nonlinear wavelet transform is also provided. It is proved that many detail coefficients being zero (or almost zero) in the smooth gray-level variation areas can be achieved under the conditional probability density function in MRF model, which shows that this operator is suitable for the task of image compression, especially for Iossless coding applications. Experimental results using several test images indicate good performances of the proposed method with the smaller entropy for the compound and smooth medical images with respect to the other nonlinear transform methods based on median and morphological operator and some well-known linear lifting wavelet transform methods (5/3, 9/7, and S+P). | LI Hongliang LIU Guizhong LI Yongli HOU Xingsong School of Electronics and Information Engineering,Xi’an jiaotong University,Xi’an 710049,China | 2004 | Science in China(Series F)2004，47，3： | 1 |
| 10 | Stability and Hopf bifurcation on a simplified BAM neural network with delays显示文摘 | SONG Yongli HAN Mao'an WEl Junjie | 2005 | Physica D2005，200，： | 1 |
| 11 | Partially-Linear Least- Squares regularized regression for system identifi- cation显示文摘 | An introduction to other kernel-based cambridge univer- Xu Yongli Chen Dirong | 2009 | IEEE Transactions on Automatic Control2009，54，11： | 1 |
| 12 | Surface-tuning nanoporous AuCu_(3) engineering syngas proportion by electrochemical conversion of CO_(2)显示文摘The direct electrochemical conversion of CO_(2) to syngas with controllable composition remains challenging. In this work, driven by concentration gradient, a simple air-heating aided strategy has been developed to adjust surface composition of the self-supporting nanoporous AuCu_(3) alloy. According to Fick First Law, the interior Cu atoms of the AuCu_(3) alloy with Au-rich surface gradually segregated outwards during heating, realizing Cu-rich surface eventually. Correspondingly, the competing electrocatalytic CO_(2) reduction (ECR) to CO and hydrogen evolution reactions (HER) were tactfully balanced on these alloy surfaces, thus achieving proportion-tunable syngas (CO/H2). Density functional theory (DFT) calculations on the Gibbs free energy change of the COOH* and H* (ΔGCOOH*, ΔGH*) on the alloy surfaces were conducted, which are generally considered as the selectivity descriptors for CO and H2 products, respectively. It shows ΔGCOOH* gradually increases in contrast to the decreased ΔGH* with more Cu on the surface, suggesting H2 is more favored over Cu sites, which is consistent with the declining CO/H2 ratio observed in the experiments. This study reveals that the surface composition controls ECR activity of nanoporous AuCu_(3) alloy, providing an alternative way to the syngas production with desirable proportion. | Chao An Yongli Shen Wenxiu Yan Linxiu Dai Changhua An | 2021 | Nano Research2021，14，11： | 1 |
| 13 | Channel Estimation for One-Bit Massive MIMO Based on Improved CGAN显示文摘In the one-bit massive multiple-input multiple-output(MIMO)channel scenario,the accurate channel estimation becomes more difficult because the signals received by the low-resolution analog-to-digital converters(ADC)are quantized and affected by channel noise.Therefore,a one-bit massive MIMO channel estimation method is proposed in this paper.The channel matrix is regarded as a two-dimensional image.In order to enhance the significance of noise features in the image and remove them,the channel attention mechanism is introduced into the conditional generative adversarial network(CGAN)to generate channel images,and im-prove the loss function.The simulation results show that the improved network can use a smaller number of pilots to obtain better channel estimation results.Under the same number of pilots and signal-to-noise ratio(SNR),the channel estimation accuracy can be improved by about 7.5 dB,and can adapt to the scenarios with more antennas. | Yongli An Jinking Yue Lei Chen Zhanlin Ji | 2022 | Journal of Communications and Information Networks2022，7，2： | 0 |
| 14 | Electron acceleration in a coil target-driven low-βmagnetic reconnection simulation显示文摘Magnetic reconnection driven by a capacitor coil target is an innovative way to investigate low-βmagnetic reconnection in the laboratory,whereβis the ratio of particle thermal pressure to magnetic pressure.Low-βmagnetic reconnection frequently occurs in the Earth’s magnetosphere,where the plasma is characterized byβ≲0.01.In this paper,we analyze electron acceleration during magnetic reconnection and its effects on the electron energy spectrum via particle-in-cell simulations informed by parameters obtained from experiments.We note that magnetic reconnection starts when the current sheet is down to about three electron inertial lengths.From a quantitative comparison of the different mechanisms underlying the electron acceleration in low-βreconnection driven by coil targets,we find that the electron acceleration is dominated by the betatron mechanism,whereas the parallel electric field plays a cooling role and Fermi acceleration is negligible.The accelerated electrons produce a hardened power-law spectrum with a high-energy bump.We find that injecting electrons into the current sheet is likely to be essential for further acceleration.In addition,we perform simulations for both a double-coil co-directional magnetic field and a single-coil one to eliminate the possibility of direct acceleration of electrons beyond thermal energies by the coil current.The squeeze between the two coil currents can only accelerate electrons inefficiently before reconnection.The simulation results provide insights to guide future experimental improvements in low-βmagnetic reconnection driven by capacitor coil targets. | Jiacheng Yu Jiayong Zhong Yongli Ping Weiming An | 2023 | Matter and Radiation at Extremes2023，8，6： | 0 |
| 15 | Nanomechanical Property Measurements of SrTiO_3 Submicron-fiber显示文摘Strontium titanate(SrTiO_3) submicron-fibers with perovskite structure were successfully synthesized by electrospinning method. The nanomechanical properties of synthesized SrTiO_3 were investigated by the novel amplitude modulation-frequency modulation(AM-FM) method based on atomic force microscope and nanoindentation technique. The results of AM-FM show that the resonant frequency of SrTiO_3 submicron-fiber is lower than that of the Si substrate, which indicates that the Young's modulus of SrTiO_3 submicron-fiber is smaller than that of Si substrate in the range of 105-125 GPa. Nanoindentation further confirmed the results, showing a value of 104 ± 17 GPa. The atomic force microscope-based AM-FM provides us a new way to study the mechanical performance of low dimensional materials. | 朱庆丰 高玉霞 YANG Yang HUANG Yongli TAN Xiaolan AN Feng 潘锴 谢淑红 | 2018 | Journal of Wuhan University of Technology(Materials Science)2018，33，6： | 0 |
| 16 | Size-effect on Ni electrocatalyst:The case of electrochemical benzyl alcohol oxidation显示文摘The nanoparticles(NPs)of Ni with different sizes endows its distinctive physical and chemical properties,which represents a typical strategy for the development of high-performance catalysts.However,the size effect of metallic Ni-NPs on electrocatalytic performance remains ambiguous.Herein,the Ni-NPs with different sizes supported on nitrogen doped carbon(NC)has been synthesized by controlling the pyrolysis temperature,leading to the synthesis of Ni@NC-500(8.3 nm),Ni@NC-280(1.9 nm)and Ni@NC-200(1.0 nm).The electrooxidation of benzyl alcohol(BA)over these nanocatalysts shows the yield of benzoic acid was 99%,82%,55%on Ni@NC-280,Ni@NC-200 and Ni@NC-500,respectively.The experimental and theoretical simulation demonstrate that the difference in the adsorption strength of reactant molecules by Ni-NPs is responsible for their different performance,where the Ni@NC-280 exhibits an optimal adsorption configuration between Ni@NC-280 electrode and BA.This work provides a new angle for designing and synthesizing efficient electrocatalysts,which may be extended to the exploration of various promising electrocatalytic systems. | Jian Zhong Yongli Shen Pei Zhu Shuang Yao Changhua An | 2023 | Nano Research2023，16，1： | 0 |
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