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Controllable Synthesis of Hollow Multishell Structured Co3O4 with Improved Rate Performance and Cyclic Stability for Supercapacitors

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Chemical Research in Chinese Universities 2020年第1期36卷 68-73页

作者： WANG Cong WANG Jiangyan hu Wenping WANG dan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190P.R.China Department of Chemistry School of Science&Collaborative Innovation Center of Chemical Science and EngineeringTianjin UniversityTianjin 300072P.R.China

Hollow multishelled structures(HoMSs)Co3O4 with specially appointed shell number(double-,triple-and quadruple-)were accurately prepared by a sequential templating *** to the superiorities of inimitable porous multishelled structure,triple-HoMSs Co3O4 achieved the best performance among all the samples with a specific capacitance of 1028.9 F/g at 10 mV/s and 688.2 F/g at 0.5 A/g,***,the electrode delivered a high rate performance(89.8%retention at 10 A/g)and excellent cycle stability(6.8%loss over 2000 cycles),showing a great promise for practical application in the future.

关键词： Hollow multishelled structure Cobalt oxide Supercapacitor

Recent advances in“universal”influenza virus antibodies:the rise of a hidden trimeric interface in hemagglutinin globular head

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Frontiers of Medicine 2020年第2期14卷 149-159页

作者： Yulu Wang dan hu Yanling Wu Tianlei Ying MOE/NHC/CAMS Key Laboratory of Medical Molecular Virology School of Basic Medical SciencesShanghai Medical CollegeFudan UniversityShanghai 200032China

Influenza causes seasonal outbreaks yearly and unpredictable pandemics with high morbidity and mortality *** significant efforts to address influenza,it remains a major threat to human public *** issue is partially due to the lack of antiviral drugs with potent antiviral activity and broad reactivity against all influenza virus strains and the rapid emergence of drug-resistant ***,designing a universal influenza vaccine that is sufficiently immunogenic to induce universal antibodies is *** novel epitopes hidden in the hemagglutinin(HA)trimeric interface have been discovered recently,and a number of antibodies targeting these epitopes have been found to be capable of neutralizing a broad range of influenza *** findings may have important implications for the development of universal influenza vaccines and antiviral *** this review,we focused on the antibodies targeting these newly discovered epitopes in the HA domain of the influenza virus to promote the development of universal anti-influenza antibodies or vaccines and extend the discovery to other viruses with similar conformational changes in envelope proteins.

关键词： influenza virus neutralizing antibody hemagglutinin globular head region trimeric interface

Modulation of bone remodeling by the gut microbiota:a new therapy for osteoporosis

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Bone Research 2023年第3期11卷 497-511页

作者： Zhengtian Lyu Yongfei hu Yuming Guo dan Liu State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

The gut microbiota(GM)plays a crucial role in maintaining the overall health and well-being of the *** studies have demonstrated that the GM may significantly influence bone metabolism and degenerative skeletal diseases,such as osteoporosis(OP).Interventions targeting GM modification,including probiotics or antibiotics,have been found to affect bone *** review provides a comprehensive summary of recent research on the role of GM in regulating bone remodeling and seeks to elucidate the regulatory mechanism from various perspectives,such as the interaction with the immune system,interplay with estrogen or parathyroid hormone(PTH),the impact of GM metabolites,and the effect of extracellular vesicles(EVs).Moreover,this review explores the potential of probiotics as a therapeutic approach for *** insights presented may contribute to the development of innovative GM-targeted therapies for OP.

关键词： remodeling osteoporosis metabolism

Differences between CMIP6 and CMIP5 Models in Simulating Climate over China and the East Asian Monsoon

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Advances in Atmospheric Sciences 2020年第10期37卷 1102-1118,I0002-I0017页

作者： Dabang JIANG dan hu Zhiping TIAN and Xianmei LANG Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China University of Chinese Academy of Sciences Beijing 100049China

We compare the ability of coupled global climate models from the phases 5 and 6 of the Coupled Model Intercomparison Project(CMIP5 and CMIP6,respectively)in simulating the temperature and precipitation climatology and interannual variability over China for the period 1961–2005 and the climatological East Asian monsoon for the period 1979–*** 92 models are able to simulate the geographical distribution of the above variables reasonably *** with earlier CMIP5 models,current CMIP6 models have nationally weaker cold biases,a similar nationwide overestimation of precipitation and a weaker underestimation of the southeast–northwest precipitation gradient,a comparable overestimation of the spatial variability of the interannual variability,and a similar underestimation of the strength of winter monsoon over northern *** comparison indicates that models have improved from CMIP5 to CMIP6 for climatological temperature and precipitation and winter monsoon but display little improvement for the interannual temperature and precipitation variability and summer *** ability of models relates to their horizontal resolutions in certain *** the multi-model arithmetic mean and median display similar skills and outperform most of the individual models in all considered aspects.

关键词： global climate models climatology interannual variability model performance China East Asia

Molybdenum carbide as catalyst in biomass derivatives conversion

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Journal of Energy Chemistry 2022年第10期31卷 68-87,I0003页

作者： Xiangze Du Rui Zhang dan Li Changwei hu Hermenegildo Garcia Key Laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064SichuanChina Instituto Universitario de Tecnología Química Consejo Superior de Investigaciones Científicas.-Universitat Politecnica de ValenciaUniversitat Politecnica de ValenciaAv.De los Naranjos s/nValencia 46022Spain Department of Chemistry University of HelsinkiA.I.Virtasen Aukio 1P.O.Box 5500014Finland

The present energy dilemma in conjunction with the adverse environmental impacts caused by fossil fuel combustion motivates researchers to seek for new renewable energy with minimal CO_(2)*** a practice pathway,it is of significance to produce biofuel and platform chemicals from sustainable biomass ***,the research and development of high-efficiency catalysts remain one key scientific *** the catalysts developed,transition metal carbides,especially molybdenum carbide,show promising performances on biomass-based *** efforts have been made in past few decades on tuning the structure and electronic property of molybdenum carbide via controlling particle size and morphology,metal and nonmetal doping and vacancies,*** review summarizes recent developments of molybdenum carbide as catalysts in converting biomass into fuel,mainly focused on the preparation methods,the structure-dependent effects and the electronic *** controllable selective cleavage of C-C,C-O and C-H bonds over modified molybdenum carbides that has been demonstrated in the conversion of biomass feedstocks is then *** addition,the possible deactivation mechanisms of molybdenum carbide are also presented in the *** review provides systematic and fundamental information for the further design and development of molybdenum carbide for the conversion of biomass resources.

关键词： Molybdenum carbide Synthesis Modification Hydrogenation Biomass Selective cleavage

Thermal decomposition mechanism of low-content-fluorite Bayan Obo rare earth concentrate roasted with sodium carbonate and its consequent separation study

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Journal of Rare Earths 2020年第9期38卷 994-1002,I0003页

作者： dan Zou Ji Chen Jiashi hu Kai Li Deqian Li State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China University of Science and Technology of China Hefei 230026China College of Chemistry and Chemical Engineering Inner Mongolia UniversityHohhot 010021China

Thermal decomposition and phase transformation for the mixture of Bayan Obo rare earth concentrate(BORC)and sodium carbonate(Na2CO3)roasted at different temperatures with weight ratio of 100:20 were studied in detail in our *** aim of our study is to reveal the nature of roasting reaction between BORC and Na2CO3 and thus providing a new method for processing *** results indicate that BORC can be decomposed completely with Na2CO3 at around 600℃after 3 *** the calcination process,Ce0.5Nd0.5O1.75,NaF,Na3PO4,and a rare earth double phosphate phase Na3RE(PO4)2 are formed after the decomposition of BORC with *** addition,the thermal decomposition mechanism is determined in the *** on these facts,a clean technique processing BORC was *** a CeF3 powder,whose composition was measured and stability was also evaluated,was obtained for some potential application from the new *** research is of significance in terms of the Na2CO3-roasting BORC solid reaction study and sheds a light on a potential clean technique for BORC.

关键词： Thermal decomposition mechanism Bayan Obo RE concentrate Na2CO3 Technique CeF3 Rare earths

Robust dual-channel correlation algorithm for complex weak target detection with wideband radar

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Journal of Systems Engineering and Electronics 2023年第5期34卷 1130-1146页

作者： DAI Yan LIU dan LI Chuanming WEI Shaopeng hu Qingrong Beijing Institute of Radio Measurement Beijing 100854China College of Oceanography and Space Informatics China University of Petroleum(East China)Qingdao 257099China Defense Technology Academy of China Aerospace Science and Industry Corporation Limited Beijing 100070China

In the scene of wideband radar,due to the spread of target scattering points,the attitude and angle of view of the target constantly change in the process of *** is difficult to predict,and the actual echo of multiple scattered points is not fully matched with the transmitted ***,it is challenging for the traditional matching filter method to achieve a complete matching effect in wideband echo *** addition,the energy dispersion of complex target echoes is still a problem in radar target detection under broadband ***,this paper proposes a wideband target detection method based on dualchannel correlation processing of range-extended *** method fully uses the spatial distribution characteristics of target scattering points of echo signal and the matching characteristics of the dual-channel point extension function *** radial accumulation of wideband target echo signal in the complex domain is realized through the adaptive correlation processing of a dual-channel echo *** accu-mulation effect of high matching degree is achieved to improve the detection probability and the performance of wideband ***,electromagnetic simulation experiments and measured data verify that the proposed method has the advan-tages of high signal to noise ratio(SNR)gain and high detection probability under low SNR conditions.

关键词： wideband radar target detection dual-channel cor-relation

Request Merging Based Cross-User Deduplication for Cloud Storage with Resistance Against Appending Chunks Attack

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Chinese Journal of Electronics 2021年第2期30卷 199-209页

作者： TANG Xin ZHANG Yi ZHOU Linna LIU dan hu Bingwei School of Information Science and Technology University of International Relations School of Cyberspace Security Beijing University of Posts and Telecommunications

Cross-user deduplication is an emerging technique to eliminate redundant uploading in cloud storage. Its deterministic response indicating the existence of data creates a side channel to attackers, which makes the privacy in the cloud at risk. Such kind of attack as well as further appending chunks attack, still cannot be well resisted in current solutions, thus is becoming a big obstacle in using this technique. We propose a secure cross-user deduplication, called Request merging based deduplication scheme(RMDS), which takes the lead to consider resistance against appending chunks attack in a lightweight way, let alone side channel attack. We utilize the proposed XOR based chunk-level server-side storage structure together with a request merging strategy to obfuscate attackers in minimized communication overhead. The experiment results show that, with security guaranteed, the proposed scheme is more efficient comparing with the state of the art.

关键词： cryptography Request merging based cross-user deduplication appending chunks attack side channel attack cloud storage security of data cloud computing request merging strategy storage management secure cross-user deduplication XOR based chunk-level server-side storage structure called Request merging based deduplication scheme data privacy

The fractal structures of the exceptional sets of Lévy processes

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Science China Mathematics 2009年第7期52卷 1459-1466页

作者： KONG LingTao SHEN dan hu XiaoYu School of Mathematical Science Graduate University of the Chinese Academy of SciencesBeijing 100049China

In this paper we review some results on the fractal geometry properties of the sets of thick points,thin points,fast points and slow points derived from Lévy processes.

关键词： thick points thin points Hausdorff dimension 28A80 60G17