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Efficient ozone decomposition over bifunctional Co_(3)Mn-layered double hydroxide with strong electronic interaction

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Chinese Chemical Letters 2022年第10期33卷 4679-4682页

作者： Bin Liu Minxian Zhang Jingling Yang Mingshan zhu Guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou 511443China

Ground-level ozone is one of the primary pollutants detrimental to human health and *** ozone decomposition still suffers from low efficiency and unsatisfactory *** this work,we report a manganese-based layered double hydroxide catalyst(Co_(3)Mn-LDH),which exhibited a superior ozone decomposition performance with the efficiency of 100% and stability over 7 h under a GHSV of 2,000,000 mL g^(-1)h^(-1) and relative humidity of 15%.Even when the relative humidity increased to 50%,the ozone decomposition also reached 86%,which significantly exceeds as-synthesized MnO_(2) and commercial MnO_(2) in *** catalytic mechanism was studied by H_(2)-TPR,FT-IR and *** excellent performance of Co_(3)Mn-LDH can be attributed to its abundant surface hydroxyl groups that ensured the preferentially surface enrichment of ozone,as well as the cyclic dynamic replenishment of electrons between multivalent Co^(2+)/Co^(3+),Mn^(2+)/Mn^(3+)/Mn^(4+)and oxygen species that endowed the stable ozone *** work offers new insights into the design of efficient catalysts for ozone pollution control.

关键词： Co_(3)Mn-layered double hydroxide Ozone removal Hydroxyl groups Bifunctional catalysis Heterogeneous catalysis

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Noncollinear Magnetism Calculation of Iron Clusters with Spin-Orbit Coupling

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Chinese Physics Letters 2011年第3期28卷 199-202页

作者： CHENG Zhi-Da zhu Jing TANG Zheng Beijing National Center for Electron Microscopy Lab of Advanced MaterialsDepartment of Materials Science and EngineeringTsinghua UniversityBeijing 100084 China Iron and Steel Research Institute Group Beijing 100081 Key Laboratory of Polar Materials and Devices(Ministry of Education) East China Normal UniversityShanghai 200241

We study iron clusters containing 2~13 atoms by ab initio calculations with both collinear and noncollinear magnetic ***-orbit coupling is only available in the noncollinear *** full structural relaxations,it is found that atom positions derived from the noncollinear method have better stability in all clusters,including those having coparallel spin *** energies of clusters calculated by the noncollinear method are also 17.3~19.8 meV/atom lower,which are too large to *** comparing the magnetic properties and electronic structures from the two methods,we believe that the difference has resulted from spin-orbit *** recommend reconsidering the importance of the noncollinear magnetic method with spin-orbit coupling in magnetic *** in transition metal clusters when atom positions and energy values are important for determining the crucial properties.

关键词： properties methods method

Statistical Property and Model for the Inter-Event Time of Terrorism Attacks

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Chinese Physics Letters 2010年第6期27卷 273-276页

作者： zhu Jun-Fang HAN Xiao-Pu WANG Bing-Hong Department of Modern Physics University of Science and Technology of China Hefei 230026 Institute of Complex Adaptive Systems Shanghai Academy of System Science Shanghai 200093

The inter-event time of terrorism attack events is investigated by empirical data and model analysis. Empirical evidence shows that it follows a scale-free property. In order to understand the dynamic mechanism of such a statistical feature, an opinion dynamic model with a memory effect is proposed on a two-dimensional lattice network. The model mainly highlights the role of individual social conformity and self-affirmation psychology. An attack event occurs when the order parameter indicating the strength of public opposition opinion is smaller than a critical value. Ultimately, the model can reproduce the same statistical property as the empirical data and gives a good understanding for the possible dynamic mechanism of terrorism attacks.

关键词： STATISTICAL physics TERRORISM EMPIRICAL research COMPUTER storage devices CONFORMITY ELECTRONIC data processing

Elastic Modulus of Fe72.5Ga27.5 Magnetostrictive Alloy

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Chinese Physics Letters 2010年第6期27卷 213-216页

作者： zhu Xiao-Xi LIU Jing-Hua JIANG Cheng-Bao School of Materials Science and Engineering Beihang University Beijing 100083

The elastic modulus of Fe72.5Ga27.5 magnetostrictive alloy is determined by testing ac impedance resonance frequency and first-principle calculations. The observed elastic modulus is 90.2 GPa for a directionally solidified sample and 103.4 GPa for a water-quenched sample tested in a dc magnetic field of 32. 7mT without compressive pre-stress. The bulk modulus by first-principles calculation is 179.3GPa which is basically consistent with the experimental result. The elastic modulus first increases and then decreases with increasing dc magnetic field, attributed to magnetostriction occurrence in the Fe72.5Ga27.5 alloy. The elastic modulus increases with increasing compressive pre-stress, resulting from the initial magnetic states change under the applied compressive pre-stress. The elastic modulus increases match well with the improved magnetostriction after quenching.

关键词： ELASTICITY IRON alloys MAGNETOSTRICTION IMPEDANCE spectroscopy SOLIDIFICATION WATER COMPRESSIBILITY METALS -- Quenching

Gold-Catalyzed Direct Indolation of Tetrahydroisoquinolines

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Chinese Journal of Chemistry 2012年第12期30卷 2741-2746页

作者： Zhang Yan Luo Sha Feng Bainian zhu Chengjian School of Medicine and Pharmaceutics Jiangnan University Wuxi diangsu 214122 China State Key Laboratry of Coordination Chemistrry School of Chemistry and Chemical Engieering Nanjing University Nanjing Jiangsu 210093 China

Nitrogen-containing heterocyclic compounds are important motifs of pharmaceuticals and functional materials, and there has been a growing interest in new synthetic methods for their preparations. In this paper, we report a direct cross-coupling reaction of indole with N-aryl tetrahydroisoquinolines in the presence of gold catalyst. The reaction is compatible with a wide range of substituted indoles, to enable the tbrmation of various alkylated heteroarenest, nder very mild reaction conditions.

关键词： C-H activation sp3 bonds indolation gold heterocyclic compounds

Construction of CoNi_(2)S_(4) nanocubes interlinked by few-layer Ti_(3)C_(2)T_(x) MXene with high performance for asymmetric supercapacitors

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Rare Metals 2022年第12期41卷 4116-4126页

作者： Ji-Qiu Qi Meng-Yuan Huang Chen-Ya Ruan Dong-Dong zhu Lei zhu Fu-Xiang Wei Yan-Wei Sui Qing-Kun Meng Jiangsu Province Engineering Laboratory of High Efficient Energy Storage Technology and Equipments School of Materials Science and PhysicsChina University of Mining and TechnologyXuzhou 221116China Key Laboratory of Air-Driven Equipment Technology of Zhejiang Province Quzhou UniversityQuzhou 324000China

Both MXene and zeolitic imidazolate framework(ZIF)derivatives are tend to agglomerate during the compound process,which adversely affects their electrochemical *** alleviate this phenomenon,fewlayer MXene was stripped by mechanical method,and electrostatic self-assembly with ZIF-67 in the presence of cationic ***,CoNi_(2)S_(4)/MXene composite was synthesized by the facile hydrothermal ***_(2)S_(4)well retained the cube frame structure of the ZIF-67 with the sagging outer frame and rough *** the composite,CoNi_(2)S_(4)nanocubes were interlinked by MXene nanosheets,which can effectively improve the structural stability and make full use of the active ***_(2)S_(4)/MXene composite electrode exhibits an outperforming specific capacitance(751 C·g^(-1)at 1 A·g^(-1)),far higher than that of pure CoNi2S4(600 C·g^(-1)at 1 A·g^(-1)).An asymmetric supercapacitor(CoNi_(2)S_(4)/MXene//reduced graphene oxide(RGO))assembling delivers high energy density of 33.8 Wh·kg^(-1)and excellent cycling *** study indicates the potential of MXene/ZIF derivatives in the application of supercapacitor.

关键词： Cubic frame structure Few-layer MXene ZIF-67 Asymmetric supercapacitor

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Practical two-dimensional correlation power analysis and its backward fault-tolerance

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Science China(Information Sciences) 2017年第6期60卷 257-259页

作者： An WANG Wenjing HU Weina TIAN Guoshuang ZHANG Liehuang zhu School of Computer Science Beijing Institute of Technology State Key Laboratory of Cryptology The Institution of Beijing Jinghang Computing Communication College of Bioengineering Beijing Polytechnic Science and Technology on Information Assurance Laboratory

Side-channel analysis was introduced by Kocher et al.[1,2]which marked the outbreak of this new research field in the applied cryptography ***,many side-channel analysis methods have been published,for example,correla... 详细信息

关键词： DCPA In Practical two-dimensional correlation power analysis and its backward fault-tolerance CCA rate TP

Researching on quadrature conversion structures For an UWB demonstrative receiver

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Journal of Systems Engineering and Electronics 2006年第4期17卷 875-882页

作者： zhu Canyan Wang Yiming Yang Huibao Liu Jiasheng School of Electronics and Information Engineering Sonchow Univ. Suzhou 215021 P.R.China

Some structures of digital quadrature AD conversion for soft-ware-defined radio （SDR） systems are studied. Their performances and affections on the SDR systems are also analyzed. Two generalized quadrature AD schemes are proposed. In one of them, the AD sampling speed can be reduced by 2 times; and in the other both the output data rate of every channel and AD sampling speed can be lowered by paralleling the digital quadrature filtering structure. These structures can be also easily implemented into modules, and the polyphase filters can be flexibly realized by VHDL language based one chip of FPGA. To assess the proposed schemes, their applications to a particular ultra wideband （UWB） demonstrative receiver system are introduced. Some experimental results are also given. It is shown that the generalized quadrature AD structures are reliable and feasible for its module design, and performances are improved obviously for its better performance to price ratio.

关键词： software defined radio (SDR). digital auadrature sonversion nolvohase filtering ultra wideband (UWB)

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Edge computing powers aerial swarms in sensing, communication, and planning

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The Innovation 2023年第6期4卷 11-12页

作者： Hai zhu Quan Chen Xiaozhou zhu Wen Yao Xiaoqian Chen Defense Innovation Institute Chinese Academy of Military SciencesBeijing 100071China College of Aerospace Science and Engineering National University of Defense TechnologyChangsha 410073China Intelligent Game and Decision Laboratory Beijing 100071China

The last decade has witnessed significant progress and extensive applications of unmanned aerial vehicles(UAVs),thanks to their exceptional mobility,cost-effectiveness,and versatile deployment capabilities.1 With continuous advances in sensing,communication,and processing technologies,using UAV swarms to provide cost-effective services in future smart cities is expected to become *** services encompass a wide spectrum of applications,ranging from large-scale infrastructure inspection,geospatial land surveying,and traffic/crowd monitoring,to three-dimensional terrain mapping.2 In these scenarios,UAVs are typically equipped with onboard sensors such as cameras and LiDARs,to gather environmental information by analyzing the sensor data such as captured videos and point *** key technologies to achieve autonomous information-gathering flight for UAV swarms include information extraction from sensor data,transmission and fusion of the extracted information among UAVs,and planning and coordination of their trajectories to ensure safe and efficient mission accomplishment.

关键词： communication gathering surveying