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| 1 | Recent progress on the recycling technology of Li-ion batteries显示文摘Lithium-ion batteries(LIBs)have been widely applied in portable electronic devices and electric vehicles.With the booming of the respective markets,a huge quantity of spent LIBs that typically use either LiFePO_(4) or Li N_(x)Co_(y)Mn_(z)O_(2) cathode materials will be produced in the very near future,imposing significant pressure for the development of suitable disposal/recycling technologies,in terms of both environmental protection and resource reclaiming.In this review,we firstly do a comprehensive summary of the-state-of-art technologies to recycle Li N_(x)Co_(y)Mn_(z)O_(2) and LiFePO_(4)-based LIBs,in the aspects of pretreatment,hydrometallurgical recycling,and direct regeneration of the cathode materials.This closed-loop strategy for cycling cathode materials has been regarded as an ideal approach considering its economic benefit and environmental friendliness.Afterward,as for the exhausted anode materials,we focus on the utilization of exhausted anode materials to obtain other functional materials,such as graphene.Finally,the existing challenges in recycling the LiFePO_(4) and Li N_(x)Co_(y)Mn_(z)O_(2) cathodes and graphite anodes for industrial-scale application are discussed in detail;and the possible strategies for these issues are proposed.We expect this review can provide a roadmap towards better technologies for recycling LIBs,shed light on the future development of novel battery recycling technologies to promote the environmental benignity and economic viability of the battery industry and pave way for the large-scale application of LIBs in industrial fields in the near future. | Yuqing Wang Ning An Lei Wen Lei Wang Xiaotong Jiang Feng Hou Yuxin Yin Ji Liang | 2021 | Journal of Energy Chemistry2021，30，4： | 10 |
| 2 | Bistratal Au@Bi2S3 nanobones for excellent NIR-triggered/multimodal imaging-guided synergistic therapy for liver cancer显示文摘To fabricate a highly biocompatible nanoplatform enabling synergistic therapy and real-time imaging,novel Au@Bi2S3 core shell nanobones(NBs)(Au@Bi2S3 NBs)with Au nanorods as cores were synthesized.The combination of Au nanorods with Bi2S3 film made the Au@Bi2S3 NBs exhibit ultrahigh photothermal(PT)conversion efficiency,remarkable photoacoustic(PA)imaging and high computed tomography(CT)performance;these Au@Bi2S3 NBs thus are a promising nanotheranostic agent for PT/PA/CT imaging.Subsequently,poly(N-vinylpyrrolidone)-modified Au@Bi2S3 NBs(Au@Bi2S3-PVP NBs)were successfully loaded with the anticancer drug doxorubicin(DOX),and a satisfactory pH sensitive release profile was achieved,thus revealing the great potential of Au@Bi2S3-PVP NBs in chemotherapy as a drug carrier to deliver DOX into cancer cells.Both in vitro and in vivo investigations demonstrated that the Au@Bi2S3-PVP NBs possessed multiple desired features for cancer therapy,including extremely low toxicity,good biocompatibility,high drug loading ability,precise tumor targeting and effective accumulation.Highly efficient ablation of the human liver cancer cell HepG2 was achieved through Au@Bi2S3-PVP NB-mediated photothermal therapy(PTT).As both a contrast enhancement probe and therapeutic agent,Au@Bi2S3-PVP NBs provided outstanding NIR-triggered multi-modal PT/PA/CT imaging-guided PTT and effectively inhibited the growth of HepG2 liver cancer cells via synergistic chemo/PT therapy. | Ruizhuo Ouyang Penghui Cao Pengpeng Jia Hui Wang Tianyu Zong Chenyu Dai Jie Yuan Yuhao Li Dong Sun Ning Guo Yuqing Miao Shuang Zhou | 2021 | Bioactive Materials2021，6，2： | 5 |
| 3 | Analysis and verification of network profile显示文摘The elements of network profile are proposed.Based on the network traffic distribution model,the network profile includes the application request rate,the branch transfer probability,the ratio of application requests,and the probability distribution of the requested objects.Based on the evaluation method of network performance reliability,four simulation cases are constructed in OPNET software,and the results show the four elements of profile have impacts on the network reliability. | Weiwei Chen Ning Huang Yuqing Liu Ye Wang Rui Kang | 2010 | Journal of Systems Engineering and Electronics2010，21，5： | 3 |
| 4 | Corrosion resistance and anti-soiling performance of micro-arc oxidation/graphene oxide/stearic acid superhydrophobic composite coating on magnesium alloys显示文摘Magnesium(Mg)alloys,the lightest metal construction material used in industry,play a vital role in future development.However,the poor corrosion resistance of Mg alloys in corrosion environments largely limits their potential wide applications.Therefore,a micro-arc oxidation/graphene oxide/stearic acid(MAO/GO/SA)superhydrophobic composite coating with superior corrosion resistance was fabricated on a Mg alloy AZ91D through micro-arc oxidation(MAO)technology,electrodeposition technique,and self-assembly technology.The composition and microstructure of the coating were characterized by scanning electron microscopy,X-ray diffraction,energy dispersive spectroscopy,and Raman spectroscopy.The effective protection of the MAO/GO/SA composite coating applied to a substrate was evaluated using potentiodynamic polarization,electrochemical impedance spectroscopy tests,and salt spray tests.The results showed that the MAO/GO/SA composite coating with a petal spherical structure had the best superhydrophobicity,and it attained a contact angle of 159.53°±2°.The MAO/GO/SA composite coating exhibited high resistance to corrosion,according to electrochemical and salt spray tests. | Dong Wang Chen Ma Jinyu Liu Weidong Li Wei Shang Ning Peng Yuqing Wen | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，6： | 3 |
| 5 | ZIF-8-based micro-arc oxidation composite coatings enhanced the corrosion resistance and superhydrophobicity of a Mg alloy显示文摘Mg alloys are considered the most promising engineering materials because of their unique properties.However,the uncontrolled corrosion rate of these alloys limits their applications.Therefore,in this study,a micro-arc oxidation layer was used as a transition layer to“directly”grow a zinc-based metal-organic framework(MOF)composite coating on the surface of a Mg alloy(AZ91D).Herein,the two zeolitic imidazolate framework(ZIF-8)coatings with different morphologies were separately prepared by homologous metal oxide induction and a one-step in-situ growth method.The superhydrophobic composite coating showed strong hydrophobicity and self-cleaning properties,which could prevent the penetration of water and corrosive ions(Cl^(−))into the surface of AZ91D.Electrochemical tests demonstrated that the super-hydrophobic composite coatings greatly enhanced the corrosion resistance of AZ91D,and the corrosion current density decreased from 10^(−5)to 10^(−9)A/cm^(2).These results indicate that the ZIF-8 coatings are beneficial for improving the hydrophobicity and enhancing the corrosion resistance of Mg alloys.Therefore,MOF composite coatings provide a new strategy that can be used to prepare multifunctional anticorrosion coatings on metal substrates. | Shiquan Jiang Zhiyuan Zhang Dong Wang Yuqing Wen Ning Peng Wei Shang | 2023 | Journal of Magnesium and Alloys2023，11，4： | 3 |
| 6 | Recursive adaptive filter using current innovation for celestial navigation during the Mars approach phase显示文摘Celestial navigation is a commonly used autonomous navigation technique for deep space navigation.A nonlinear filter such as the unscented Kalman filter(UKF) is typically applied in a celestial navigation system(CNS). However, on account of being subject to a number of factors, such as ephemeris errors and centroid determination, the measurement model error of a CNS cannot be accurately determined. The analysis conducted in this study also shows that the measurement model error is time-variant during the Mars approach phase.This implies that covariance matrix of the measurement error R is usually inaccurate, which may induce large estimation errors that even result in filter divergence. Some adaptive methods are able to address this issue.However, traditional adaptive filters, for scaling R, usually require a sequence of innovation and are affected by the statistic window size. A new recursive adaptive UKF(RAUKF) is proposed in this paper, which only uses current innovation to scale R. The navigation performance of the proposed RAUKF method is compared with some traditional adaptive filters through simulations. The results show that this method is better than traditional adaptive filters in a CNS during the Mars approach phase. | Xiaolin NING Zhuo LI Weiren WU Yuqing YANG Jiancheng FANG Gang LIU | 2017 | Science China(Information Sciences)2017，60，3： | 3 |
| 7 | Multimarker Detection of MAGE-1,MAGE-3 and AFP mRNAs by a Real-time Quantitative PCR Assay:a Possible Predictor of Hematogenous Micrometastasis of Hepatocellular Carcinoma显示文摘OBJECTIVE To explore the relationship between multimarker detection of MAGE-1,MAGE-3 and AFP mRNAs in the peripheral blood of patients with hepatocellular carcinoma and micrometastasis using a realtime quantitative-PCR(real-time Q-PCR)assay. METHODS Peripheral blood samples were obtained from control subjects and 86 patients with hepatocellular carcinoma (HCC).Real-time Q-PCR was used to detect MAGE-1,MAGE-3, and AFP mRNAs in the blood cells. RESULTS In 86 tumor specimens,the positivity for MAGE-1, MAGE-3,and AFP genes was respectively 34.9%(30/86),60.5% (52/86)and 69.8%(60/86).All specimens expressed at least one marker.MAGE-1,MAGE-3,and AFP transcripts were detected respectively in 12(14.0%),18(20.1%)and 29(33.7%)of the 86 blood specimens from hepatocellular carcinoma patients,while 45 specimens(52.3%)were positive for at least one marker.In addition,MAGE-1,MAGE-3 and AFP gene transcripts were not detected in any peripheral blood specimens from 25 chronic liver disease patients and 28 normal healthy volunteers.The positive rate correlated with the TNM clinical stages,extrahepatic metastasis and portal vein carcinothrombosis(P<0.05).No correlation was found between tumor size,tumor number, differentiation,serum a-fetoprotein(AFP)and the positive rate. CONCLUSION Our results indicate that a multimarker real- time Q-PCR assay with cancer-specific markers such as MAGE-1 and MAGE-3 in combination with a hepatocyte-specific AFP marker may be a promising diagnostic tool for monitoring hepatocellular carcinoma patients with better sensitivity and specificity. | Yuqing Zhang Qiang Li Ning Liu Tianqiang Song Rende Guo Lingxin Meng Xishan Hao | 2008 | Chinese Journal of Clinical Oncology2008，5，2： | 2 |
| 8 | Crystallographic facet-dependent stress responses by polyhedral lead sulfide nanocrystals and the potential "safe-by-design" approach显示文摘nanomaterials 的特别物理化学的性质能得到唯一的生物回答。性质活动关系通常为毒性机制的深入的理解并且设计更安全的 nanomaterials 被建立。在这研究,一系列多面的铅硫化物(PbS ) 的特定的结晶的方面的有毒的角色包括截断的八面体, cuboctahedrons,截断的立方体,和立方体, nanocrystals 在人的支气管的上皮的房间(BEAS-2B ) 和鼠科的牙槽的巨噬细胞被调查(未加工 264.7 ) 房间。{ 100 }方面触发方面依赖者被发现有能力细胞的氧化应力和重金属压力回答例如谷胱甘肽弄空,类脂化合物 peroxidation ,反应的氧种类( ROS )生产, heme oxygenase-1 ( HO-1 )和 metallothionein ( MT )表示,和 mitochondrial 机能障碍,当时{ 111 }方面在生物条件下面仍然保持惰性。{ 100 }-facet-dependent 毒性被归功于到 { 100 }-facet-dependent 铅溶解,当时低铅溶解 { 111 } 方面由于负担得起由的强壮的保护 poly (乙烯基 pyrrolidone ) 在合成期间。基于这种方面毒性关系, safe-by-design 策略被设计阻止铅溶解 { 100 } 通过原子地薄的铅氯化物 adlayers 的形成的方面,导致更安全的多面的 PbS nanocrystals。 | Yun Chang Kai Li Yanlin Feng Ning Liu Yan Cheng Xiujuan Sun Yuqing Feng Xi Li Zhijian Wu Haiyuan Zhang | 2016 | Nano Research2016，9，12： | 1 |
| 9 | Improving tensile-shear properties of friction stir lap welded dissimilar Al/Mg joints by eliminating hook defect and controlling interfacial reaction显示文摘To improve tensile-shear properties of fiction stir lap welded(FSLW) dissimilar Al/Mg joints, pin-tip profiles were innovatively designed and welding speed was optimized, and effects of them on formation, interface microstructure and mechanical properties of different FSLW joints were investigated. With increasing the welding speed, the tensile-shear load of FSLW joints produced by three pins presents an increasing firstly and then decreasing trend. Compared with Rpin, the hook and hole defect in the joints made by S-pin and T-pin are eliminated owing to additional eccentric force. Moreover, the joints obtained by T-pin at 75 mm/min have the highest tensile-shear load, and a maximum value of 3.425 kN is produced, which increases by 96.8%.Meanwhile, the pin-tip profile improves significantly the interface reaction depending on the welding temperature. For R-pin, thick brittle intermetallic compounds of about 6.9 μm Al3Mg2and 13.3 μm Al12Mg17layers at the welding interface derived from diffusion reaction are formed, resulting in continuous cracks. However, using T-pin can raise the interface temperature, and which makes the interface liquefy locally to generate only 2.2 μm Al3Mg2layer and dispersive(Al12-Mg17+Mg) eutectic structure. This can release high residual stress and remove welding crack, consequently enhancing the interface properties of T-pin joints. | Yuqing MAO Ping YANG Wenyan ZHANG Ning LI Hao NIE Danyang LIN Liming KE | 2023 | Chinese Journal of Aeronautics2023，36，7： | 1 |
| 10 | Functionalization of bismuth sulfide nanomaterials for their application in cancer theranostics显示文摘Multifunctional bismuth sulfide(Bi_(2)S_(3))nanomate rials exhibit significant potential as na no medicines for the diagnosis and treatment of cancer.These nanomaterials act as excellent photothermal agents and radiation sensitizers for the treatment of tumors,and they can also act as contrast agents for computed tomography(CT)imaging,photoacoustic imaging(PA),and other forms of imaging to provide real-time tumor monitoring and testing guidance.Compared with other nanomaterials,Bi2S3 nanomaterials can readily adapt to different applications by virtue of the fact that they can be easily functionalized.However,these nanomaterials have some limitations that cannot be ignored and need to be addressed,such as poor biocompatibility,toxicity,and low chemical stability.It is widely believed that appropriate functionalization of Bi_(2)S_(3) nanomaterials could remedy such defects and significantly improve performance.This review summarizes the ways in which Bi_(2)S_(3) nanomaterials can be functionalized and discusses their applications in cancer theranostics over the last few years,focusing particularly on imaging and therapy.We also discuss issues relating to how Bi_(2)S_(3) nanomaterials can be analyzed,including how we might be able to use these systems to inhibit and treat tumors and how current limitations might be ove rcome to improve treatment efficacy.Finally,we hope to provide inspiration and guidance as to how we might create a mo re optimized multifunctio nal nano-system for the diagnosis and treatment of tumors. | Hui Wang Junlei Yang Penghui Cao Ning Guo Yuhao Li Yuefeng Zhao Shuang Zhou Ruizhuo Ouyang Yuqing Miao | 2020 | Chinese Chemical Letters2020，31，12： | 0 |
| 11 | Improved Dynamics Model of Locomotive Traction Motor with Elasticity of Rotor Shaft and Supporting Bearings显示文摘The locomotive traction motor is described as a rotor-bearing system coupling the kinetic equations of the traction shaft and its support bearings with the determination of their elastic deformations in this study.Under the effect of excitations induced by the dynamic rotor eccentric distance and time-varying mesh stiffness,the elastic structure deformations of the shaft and support bearings are formulated in the vibration environment of the locomotive.In addition,the nonlinear contact forces between the components of the rolling bearing,the lubricating oil film,and radial clearance are comprehensively considered in this study.The results indicate that the elastic deformations of the shaft and bearings can change the dynamic responses of the traction motor and its support bearings.There are large differences between the ranges of the rotor motion calculated by the rigid and the flexible traction motor models when the intensified wheel-rail interaction is considered.With the increase of the rotor eccentricity,the results underscore the role of the elasticity of traction shaft and support bearings in dynamic researches of the traction motor.The critical value of the initial eccentric distance for the rub-impact phenomenon decreases from 1.23 mm to 1.15 mm considering the flexible effect of the shaft and bearings.This dynamics model of the traction motor can provide more accurate and reasonable simulation results for correlational dynamic researches. | Yuqing Liu Zaigang Chen Jieyu Ning Kaiyun Wang Wanming Zhai | 2022 | Chinese Journal of Mechanical Engineering2022，35，5： | 0 |
| 12 | ZnO@ZIF-8 core-shell structure nanorods superhydrophobic coating on magnesium alloy with corrosion resistance and self-cleaning显示文摘A longstanding quest in material science has been the development of superhydrophobic coating based on a single material, without the requirement of fluorination or silane treatment. In this work, the micro-arc oxidation(MAO) coating as transition layer can effectively enhance the bonding force of the superhydrophobic coating. The semiconductor@metal organic frameworks(MOFs) core-shell structure was synthesized by a simple self-templating method, and obtained ZnO@2-methylimidazole zinc salt(ZIF-8) nanorods array on magnesium(Mg)alloy. ZnO nanorods not only act as the template but also provide Zn^(2+) for ZIF-8. In addition, we proved that the ligand concentration,synthesis time and temperature are the keys to the preparation of ZnO@ZIF-8 nanorods. As we expect, the ZnO@ZIF-8 nanorods array can trap air in the gaps to form an air layer, and the coating exhibits superhydrophobic properties(154.81°). Excitingly, ZnO@ZIF-8 nanorods array shown a superhydrophobic property, without the requirement of fluorination or silane treatment. The results shown that the coating has good chemical stability and self-cleaning performance. Meanwhile, the corrosion resistance has been significantly improved, R_(ct) was increased from 1.044×10^(3) to 1.414×10^(6) Ω/cm^(2) and I_(corr) was reduced from 4.275×10^(-5) to 5.611×10^(-9)A/cm^2. Therefore, the semiconductor@MOFs core-shell structure has broad application prospects in anti-corrosion. | Shiquan Jiang Weidong Li Jinyu Liu Jiqiong Jiang Zhe Zhang Wei Shang Ning Peng Yuqing Wen | 2023 | Journal of Magnesium and Alloys2023，11，9： | 0 |
| 13 | Convergence Analysis of Village Collective Economy Based on a Long-Term (1978-2018) Observation of 40 Villages in the Suburbs of Beijing显示文摘This paper uses the follow-up survey data of six time points between 1978 and 2018 from 40 fixed observation points in Beijing suburbs by stratified sampling,and makes a long-term observation and analysis of the convergence of village collective economy(VCE).The main findings are as follows.(1)Since the start of reform and opening-up,the gap between villages in terms of total village economic income(TVEI)and total assets of village collectives has obviously widened,and the gap between villages in terms of the number of members of VCE organizations has also widened to a certain extent.(2)There is a big gap in VCE between villages in urban-rural fringe,plain and mountainous areas,and the convergence of'space club'appears.(3)In the early stage of reform and opening up,the VCE development had the opportunity to reshuffle,but from 1998 to 2018,village development showed a trend of'goodmedium-poor''hierarchical solidification.Therefore,it is necessary to explore a new path of cross-village joint development,especially to develop and strengthen the township-level collective economy,so as to promote farmers'common prosperity in ruralareas. | Xueyuan Chen Yuqing Zhou Ning Weng | 2023 | China Finance and Economic Review2023，12，1： | 0 |
| 14 | Preparation and property of self-sealed plasma electrolytic oxide coating on magnesium alloy显示文摘Plasma electrochemical oxidation (PEO) is a surface modification technology to form ceramic coatings on magnesium alloys However,its application is limited due to its defects.This work reports a novel preparation of in-situ sealing of PEO coatings by four-layer voltage and sol addition.The morphology and structure were characterized by scanning electron microscopy (SEM),energy dispersive X-ray spectroscopy (EDS),and X-ray diffractometer (XRD).Image-Pro Plus 6.0 was used to determine the porosity of the coating,which was decreased from 8.53%to 0.51%.Simultaneously,the coating thickness was increased by a factor of four.The anti-corrosion performance of each sample was evaluated using electrochemical tests,and the findings revealed that the corrosion current density of coatings (i_(corr)) of the samples were lowered from 9.152×10^(-2) to 6.152×10^(-4) mA·cm^(-2),and the total resistance (R_(T)) of the samples were enhanced from 2.19×10^(4) to 2.33×10^(5)Ω·cm^(2).The salt spray test used to simulate the actual environment showed that corrosion points appeared on the surface of the coating only at the 336 h.In addition,the mechanism of PEO self-sealing behavior was described in this article. | Chen Ma Dong Wang Jinyu Liu Ning Peng Wei Shang Yuqing Wen | 2023 | International Journal of Minerals,Metallurgy and Materials2023，30，5： | 0 |
| 15 | kLDM:Inferring Multiple Metagenomic Association Networks Based on the Variation of Environmental Factors显示文摘Identification of significant biological relationships or patterns is central to many metagenomic studies.Methods that estimate association networks have been proposed for this purpose;however,they assume that associations are static,neglecting the fact that relationships in a microbial ecosystem may vary with changes in environmental factors(EFs),which can result in inaccurate estimations.Therefore,in this study,we propose a computational model,called the k-Lognormal-Dirichlet-Multinomial(kLDM)model,which estimates multiple association networks that correspond to specific environmental conditions,and simultaneously infers microbe-microbe and EF-microbe associations for each network.The effectiveness of the kLDM model was demonstrated on synthetic data,a colorectal cancer(CRC)dataset,the Tara Oceans dataset,and the American Gut Project dataset.The results revealed that the widely-used Spearman’s rank correlation coefficient method performed much worse than the other methods,indicating the importance of separating samples by environmental conditions.Cancer fecal samples were then compared with cancer-free samples,and the estimation achieved by kLDM exhibited fewer associations among microbes but stronger associations between specific bacteria,especially five CRC-associated operational taxonomic units,indicating gut microbe translocation in cancer patients.Some EF-dependent associations were then found within a marine eukaryotic community.Finally,the gut microbial heterogeneity of inflammatory bowel disease patients was detected.These results demonstrate that kLDM can elucidate the complex associations within microbial ecosystems.The kLDM program,R,and Python scripts,together with all experimental datasets,are accessible at http://gffzz188fe103f8f1460asvfq66puqvpx966kp.ffgz.tsg.suse.edu.cn/tinglab/kLDM.git. | Yuqing Yang Xin Wang Kaikun Xie Congmin Zhu Ning Chen Ting Chen | 2021 | Genomics, Proteomics & Bioinformatics2021，19，5： | 0 |
| 16 | Spatio-temporal Granularity Co-optimization Based Monthly Electricity Consumption Forecasting显示文摘Monthly electricity consumption forecasting(ECF)plays an important role in power system operation and electricity market trading.Widespread popularity of smart meters enables collection of fine-grained load data,which provides an opportunity for improvement of monthly ECF accuracy.In this letter,a spatio-temporal granularity co-optimization-based monthly ECF framework is proposed,which aims to find an optimal combination of temporal granularity and spatial clusters to improve monthly ECF accuracy.The framework is formulated as a nested bi-layer optimization problem.A grid search method combined with a greedy clustering method is proposed to solve the optimization problem.Superiority of the proposed method has been verified on a real smart meter dataset. | Kangping Li Yuqing Wang Ning Zhang Fei Wang Chunyi Huang | 2023 | CSEE Journal of Power and Energy Systems2023，9，5： | 0 |
| 17 | Accelerometer Bias and Star Sensor Installation Error Joint Calibration for the SINS/CNS Integrated Navigation System Using Attitude Maneuver显示文摘The integrated strap-down inertial nav igation system/olelestial navigation system(SINS/CNS)i an important autonomous navigation method with efective concealment and high predision.Both accelerometer biss and star ensor installation error ame important factors that aflect the performanoe of this mavigation system,which needl to be calibratexd and compensatedl.A new acelerometer bias and star sensor installation error joint calibration method for the SINS/CNS integrated navigation system i propoeed.In this newly propoeed method,the installation error of star sensor is augmented to the state vector,and the star vector,nadir angle,horkzontal poeition error and velbcity error ame ueed a8 measurementa to calbrate the two errors mentioned above.Simulations show that both accelerometer bias and star sensor installation enror an be calibratedl efectively. | Xiaolin Ning Yuqing Yang Xiaoyu Liang Jie Zhang | 2022 | Guidance, Navigation and Control2022，2，2： | 0 |
| 18 | A new SINS/RCNS integrated navigation method based on star pixel coordinates显示文摘The traditional strapdown inertial navigation system(SINS)/celestial navigation system(CNS)integrated navigation system using the starlight vector or posture difference calculated by SINS and CNS as a measurement can correct the posture error of SINS,but not the position error[1].The refraction celestial navigation system(RCNS)can independently provide the position information. | Guangxin SONG Yuqing YANG Xiaolin NING Jiancheng FANG Weiren WU | 2023 | Science China(Information Sciences)2023，66，9： | 0 |
| 19 | An improved underwater acoustic communication channel estimation based on the A*OMP algorithm显示文摘A*Orthogonal Matching Pursuit(A*OMP)was modified and applied to underwater acoustic channel estimation,which outperformed than OMP.A*OMP is a pseudo-greedy algorithm,and can improve the problem of OMP algorithm falling into local optimization.Even though A*OMP has better performance than OMP,the channel estimation error cannot decrease as signal-to-noise ratio(SNR)increases.To solve the problem,the initialization procedure and termination criterion of A*OMP was modified for channel estimation,to select right initial searching path and avoid too many iterations which cause unknown errors.Based on orthogonal frequency division multiplexing(OFDM)system,numerical simulation results showed that the pilot interval did not obviously affect the performance of the modified A*OMP.And there was no channel estimation error floor for the modified A*OMP.The error of the proposed algorithm was reduced by two and one orders of magnitude respectively from those of OMP and A*OMP.The proposed method outperformed the OMP and traditional A*OMP algorithm in both estimation accuracy and communication performance,with bit error rate(BER)reductions of 42.0%and 4.7%,respectively. | LIU Biao JIA Ning HUANG Jianchun XIAO Dong JIA Yuqing GUO Shengming MA Li | 2023 | Chinese Journal of Acoustics2023，42，1： | 0 |
| 20 | Preparation of bimetal Co-Ni supported on Mg-Al oxide for chemocatalytic upgrading of tailored fermentation products to energy intensive fuels显示文摘The great challenge in the aldol condensation of tailored fermentation products(acetone-butanol-ethanol,ABE)into energy intensive fuels is to develop a suitable catalyst with high activity and low-cost.In this study,Co,Ni,and Co-Ni supported on Mg-Al oxide catalysts were prepared and their pore diameters were enlarged via adding active carbon as a hard template into Mg-Al hydrotalcite.During the aldol condensation reaction,the catalyst activity was enhanced after enlarging the pore diameter and Co-Ni bimetal supported catalyst presented the highest activity,which was resulted from that the electron transfer between Co and Ni in Co-Ni alloy enhanced the dehydrogenation activity and large pore lowered the mass transfer resistance.After optimizing the reaction conditions,acetone conversion and the total selectivity of C_(5)-C_(11)desired products in the aldol condensation of ABE reached up to 76%and 90%,respectively.The stability study showed that the activity was decreased with the increase of reaction number because of the oxidation of metallic Co and Ni,but this could be solved via a simple hydrogen reduction method. | Jiajun Liu Kui Wu Zhengke Li Wensong Li Yuqing Ning Weiyan Wang Yunquan Yang | 2022 | Green Energy & Environment2022，7，3： | 0 |
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