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Nano products in daily life:to know what we do not know

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National Science Review 2016年第4期3卷 414-415页

作者： Yongyi Wei bing yan School of Chemistry and Chemical Engineering Shandong University School of Environment Jinan University

Over the past decade,products based on nanotechnology and nanomaterials have created a fast-growing consumer market（http://***/）.Over 1827 consumer products have reached the supermarkets and millions of *** least about 39different nanomaterials were found in these products,such as those made from metals（Ag,Ti,Zn,Au）,metal oxides（TiO;,Fe;O;,ZnO）,carbonaceous（carbon,CNTs,fullerenes,graphene）

关键词： CNTs life Nano products in daily life Zn

Cooperative control for heterogeneous multi-agent systems: progress, applications, and challenges

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Science China(Information Sciences) 2024年第5期67卷 318-320页

作者： bing yan Peng SHI Jonathon CHAMBERS School of Electrical and Mechanical Engineering Faculty of Science Engineering and TechnologyThe University of Adelaide School of Engineering College of Science and Engineering University of Leicester

Cooperative control for heterogeneous multi-agent systems(MASs) is a critical and rapidly evolving field in modern automation and robotics. Characterized by the integration of agents with diverse capabilities and func... 详细信息

关键词： Multi agent systems

Coulomb Stress Evolution History as Implication on the Pattern of Strong Earthquakes along the Xianshuihe-Xiaojiang Fault System, China

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Journal of Earth Science 2018年第2期29卷 427-440页

作者： bing yan Shinji Toda Aiming Lin School of Earth Sciences and Engineering Nanjing University Department of Geophysics Graduate School of Science Kyoto University International Research Institute of Disaster Science Tohoku University

Coulomb stress accumulation and releasing history and its relationship with the occur- rence of strong historical earthquakes could deepen our understanding of the occurrence pattern of strong earthquakes and hence its seismic potential in future. The sinistral strike-slip Xianshuihe- Xiaojiang fault zone （XXFS） is one of the most dangerous fault zones in China, extending 1 500-km- long from the central Tibetan Plateau to the Red River fault zone. There are 35 M≥6.5 historical earth- quakes occurred since 1327, hence it is an ideal site for studying the Coulomb stress evolution history and its relationship with the occurrences of strong earthquakes. In this study, we evaluated the Cou- lomb stress change history along the XXFS by synthesizing fault geometry, GPS data and historical earthquakes. Coulomb stress change history also revealed different patterns of historical earthquakes on different segments of the XXFS, such as characteristic recurrence intervals along the Salaha-Moxi fault and super-cycles along the Xianshuihe fault. Based on the occurrence pattern of past historical earthquakes and current Coulomb stress field obtained in this study, we suggest positive ACFS and hence high seismic potential along the Salaha-Moxi fault and the Anninghe fault.

关键词： Tibetan Plateau Xianshuihe-Xiaojiang fault system Coulomb stress triggering theory recurrence interval seismic hazard.

Adaptive fault-tolerant control of heavy lift launch vehicle via differential algebraic observer

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Journal of Central South University 2013年第8期20卷 2142-2150页

作者： ZHAO Dang-jun JIANG bing-yan College of Mechanical and Electrical Engineering Central South University Changsha 410083 China School of Aeronautics and Astronautics Central South University Changsha 410083 China

A novel adaptive fault-tolerant control scheme in the differential algebraic framework was proposed for attitude control of a heavy lift launch vehicle （HLLV）. By using purely mathematical transformations, the decoupled input-output representations of HLLV were derived, rendering three decoupled second-order systems, i.e., pitch, yaw and roll channels. Based on a new type of numerical differentiator, a differential algebraic observer （DAO） was proposed for estimating the system states and the generalized disturbances, including various disturbances and additive fault torques. Driven by DAOs, three improved proportional-integral- differential （PID） controllers with disturbance compensation were designed for pitch, yaw and roll control. All signals in the closed-loop system were guaranteed to be ultimately uniformly bounded by utilization of Lyapunov＇s indirect method. The convincing numerical simulations indicate that the proposed control scheme is successful in achieving high performance in the presence of parametric perturbations, external disturbances, noisy corruptions, and actuator faults.

关键词： fault-tolerant control heavy lifting launch vehicle uniformly ultimately bounded attitude control differential algebra numerical differentiation

Retrieval of Eddy Thermal Conductivity in the Weakly Nonlinear Prandtl Model for Katabatic Flows

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Journal of Meteorological Research 2017年第5期31卷 965-975页

作者： bing yan Sixun HUANG Jing FENG Institute of Meteorology and Oceanography National University of Defense Technology State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyState Oceanic Administration

Because the nonlinearity of actual physical processes can be expressed more precisely by the introduction of a non- linear term, the weakly nonlinear Prandtl model is one of the most effective ways to describe the pure katabatic flow （no backgrotmd flow）. Features of the weak nonlinearity are reflected by two factors： the small parameter c and the gradually varying eddy thermal conductivity. This paper first shows how to apply the Wentzel-Kramers-Brillouin （WKB） method for the approximate solution of the weakly nonlinear Prandtl model, and then describes the retrieval of gradually varying eddy thermal conductivity from observed wind speed and perturbed potential temperature. Gradually varying eddy thermal conductivity is generally derived from an empirical parameterization scheme. We utilize wind speed and potential temperature measurements, along with the variational assimilation technique, to de- rive this parameter. The objective function is constructed by the square of the differences between the observation and model value. The new method is validated by numerical experiments with simulated measurements, revealing that the order of the root mean squre error is 10-2 and thus confirming the method＇s robustness. In addition, this me- thod is caoable of anti-interference, as it effectivelv reduces the influence of observation error.

关键词： weakly nonlinear Prandtl model parameter retrieval variational method Wentzel-Kramers-Brillouin(WKB) method

Preparation and characterization of porous ceramics prepared by kaolinite gangue and Al(OH)_3 with double addition of MgCO_3 and CaCO_3

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International Journal of Minerals,Metallurgy and Materials 2011年第4期18卷 450-454页

作者： Wen yan Nan Li bing-qiang Han The Key State Laboratory Breeding Base of Refractories and Ceramics Wuhan University of Science and Technology Wuhan 430081 China

Porous ceramics were prepared from kaolinite gangue and Al（OH）3 with double addition of MgCO3 and CaCO3 by the pore-forming in-situ *** characterizations of porous ceramics were investigated by X-ray diffractometry,scanning electron microscopy,and mercury porosimetry measurements,*** is found that although the decomposition of MgCO3 and CaCO3 has little contribution to the porosity,the double addition of MgCO3 and CaCO3 strongly affects the formation of liquid phase,and then changes the phase compositions,pore characterization,and *** appropriate mode is the sample containing 1.17wt% MgCO3 and 1.17wt% CaCO3,which has high apparent porosity（41.0%）,high crushing strength（53.5 MPa）,high mullite content（76wt%）,and small average pore size（3.24 μm）.

关键词： porous ceramics characterization kaolinite aluminum hydrxide additives

A new method for particle manipulation by combination of dielectrophoresis and field-modulated electroosmotic vortex

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Applied Mathematics and Mechanics(English Edition) 2018年第3期39卷 409-422页

作者： Chuanchuan XIE Bo CHEN bing yan Jiankang WU School of Civil Engineering and Mechanics Huazhong University of Science and Technology Department of Mechanical and Electrical Engineering Wenhua College

A field-modulated electroosmotic flow （FMEOF） in a microchannel can be obtained by applying modulating electric fields in a direction perpendicular to the channel wall. Micro-vortexes are generated around the electrodes along with an EOF due to the surface charge on the modulated wall. When polarizable particles are suspended near the electrodes, they experience dielectrophoretic forces due to a non-uniform electric field. In this paper, micro-vortexes and dielectrophoretic forces are combined to achieve separation and trap different sized particles in a continuous flow. Numerical results indicate that by adjusting the driving electric field parallel to the channel wall and the modulating electric field, the ratio of dielectrophoretic and hydrodynamic forces can be altered. One type of particles can be trapped by micro-vortexes （negative dielectrophoresis （DEP））, and the other particles are transported to the downstream so that the particles are separated. The influence of the electrode length and the channel height on the trapping rate is investigated.

关键词： electroosmotic dielectrophoretic micro-vortex particle separation

A high propylene productivity over B2O3/SiO2@honeycomb cordierite catalyst for oxidative dehydrogenation of propane

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2778-2784页

作者： Yuxi Zhou yangWang Wenduo Lu bing yan Anhui Lu State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Catalytic Conversion Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

Boron-based metal-free catalysts for oxidative dehydrogenation of propane(ODHP)have drawn great attention in both academia and industry due to their impressive activity and olefin ***,the SiO2 and B2O3 sequentially coated honeycomb cordierite catalyst is designed by a two-step wash-coat method with different B2O3 loadings(0.1%–10%)and calcination temperatures(600,700,800℃).SiO2 obtained by TEOS hydrolysis acts as a media layer to bridge the cordierite substrate and boron oxide via abundant Si\\OH *** welldeveloped straight channels of honeycomb cordierite make it possible to carry out the reactor under high gas hourly space velocity(GHSV)and the thin wash-coated B2O3 layer can effectively facilitate the pore diffusion on the *** prepared B2O3/SiO2@HC monolithic catalyst exhibits good catalytic performance at low boron oxide loading and achieves excellent propylene selectivity(86.0%),olefin selectivity(97.6%,propylene and ethylene)and negligible CO2(0.1%)at 16.9%propane conversion under high GHSV of 345,600 ml·(g B2O3)^-1·h^-1,leading to a high propylene space time yield of 15.7 g C3H6·(g B2O3)^-1·h^-1 by suppressing the *** obtained results strongly indicate that the boron-based monolithic catalyst can be properly fabricated to warrant the high activity and high throughput with its high gas/surface ratio and straight channels.

关键词： Oxidative dehydrogenation Boron-based catalyst Alkane Propylene Monolith High GHSV

Extraskeletal Chondroma in the Popliteal Region: A Case Report

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Chinese Medical Sciences Journal 2015年第4期30卷 270-272页

作者： bing-yan Mao Department of Orthopaedic Surgery Shimen Hospital of Changsha Medical University

EXTRASKELETAL chondroma is a rare benigntumor that usually develops in the soft tissue,which commonly occurs in the limbs of adults andgenerally presents as painless masses without thesurrounding tissues involvement. The diagnosis mainlydepends on computed tomography, magnetic resonanceimaging （MRI） examination, and postoperative pathologicalexamination. This paper reports a case of extraskeletalchondroma in the popliteal region.

关键词： extraskeletal chondroma popliteal region