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Technical system design and construction of China’s HJ-1 satellites

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International Journal of Digital Earth 2012年第3期5卷 202-216页

作者： qiao wang Satellite Environment Center Ministry of Environmental ProtectionBeijingChina

The Chinese Government attaches great importance to applications of satellite remote sensing in environmental *** 6 September 2008,the first two satellites of the Environment and Disaster Monitoring and Prediction Satellite Constellation(HJ),HJ-1A and HJ-1B,were successfully launched,which started a new era of satellite applications for environmental monitoring in *** introduction to the satellite,instrument,and ground systems of HJ-1A and HJ-1B is presented in this article,and an analysis of their technical performance and characteristics is also *** on the operational needs of environmental monitoring in China,the general design,functional construction,and operational mode of the application system of HJ-1A and HJ-1B are detailed,and the operations and applications of the two satellites are also discussed.

关键词： HJ-1 satellites environmental remote sensing system design application system development

Edge Coloring of Graphs Embedded in a Surface of Nonnegative Characteristic

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Acta Mathematicae Applicatae Sinica 2017年第3期33卷 709-716页

作者： Yi-qiao wang School of Management Beijing University of Chinese MedicineBeijing 100029China

Let G be a graph embeddable in a surface of nonnegative characteristic with maximum degree six. In this paper, we prove that if G contains no a vertex v which is contained in all cycles of lengths from 3 to 6, then G ... 详细信息

关键词： embedded Graph chromatic index cycle class 1

PhotoNs-GPU:A GPU accelerated cosmological simulation code

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Research in Astronomy and Astrophysics 2021年第11期21卷 98-104页

作者： qiao wang Chen Meng Key Laboratory for Computational Astrophysics National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China

We present a GPU-accelerated cosmological simulation code,PhotoNs-GPU,based on an algorithm of Particle Mesh Fast Multipole Method(PM-FMM),and focus on the GPU utilization and optimization.A proper interpolated method for truncated gravity is introduced to speed up the special functions in *** verify the GPU code in mixed precision and different levels of the interpolated method on GPU.A run with single precision is roughly two times faster than double precision for current practical cosmological *** it could induce an unbiased small noise in power *** with the CPU version of PhotoNs and Gadget-2,the efficiency of the new code is significantly *** all the optimizations on the memory access,kernel functions and concurrency management,the peak performance of our test runs achieves 48%of the theoretical speed and the average performance approaches to~35%on GPU.

关键词： methods:numerical cosmology:theory large-scale structure of universe

Upper bound of the third edge-connectivity of graphs

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Science China Mathematics 2005年第3期48卷 360-371页

作者： wang Yingqian LI qiao Department of Mathematics Zhejiang Normal University Jinhua 321004 China Department of Applied Mathematics Shanghai Jiaotong University Shanghai 200030 China

Let G be a simple connected graph of order n ≥ 6. The third edge-connectivity of G is defined as the minimum cardinality over all the sets of edges, if any, whose deletion disconnects G and every component of the resulting graph has at least 3 vertices. In this paper, we first characterize those graphs whose third-edge connectivity is well defined,then establish the tight upper bound for the third edge-connectivity.

关键词： third edge-connectivity, upper bound.

Theoretical demonstration of surface plasmon polaritons in plasma/vacuum interface in GHz frequency

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Plasma Science and Technology 2019年第10期21卷 1-8页

作者： qiao wang Liyun MA Department of Physics Dalian University of Technology

Negative permittivity of the material may lead to the enhanced radiation of an antenna embedded in a finite plasma,which suggests a potential way to solve blackout problem in space ***,the enhanced radiation phenomenon is still lack of strict theoretical investigations of surface plasmon polaritons(SPPs) in plasma in GHz *** this paper,we demonstrate the SPPs excited at a plasma/vacuum interface in GHz frequency by the consistency of the simulated and theoretical *** SPPs,plasma layer thicker than skin depth can be penetrated with w

关键词： enhanced radiation surface plasmon polaritons skin depth

DNA-Polyelectrolyte Composite Responsive Microparticles for Versatile Chemotherapeutics Cleaning

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Research 2023年第4期2023卷 349-359页

作者： Chong wang Jiali wang Zhuohao Zhang qiao wang Luoran Shang Shanghai Xuhui Central Hospital Zhongshan-Xuhui Hospitaland the Shanghai Key Laboratory of Medical Epigeneticsthe International Co-laboratory of Medical Epigenetics and Metabolism(Ministry of Science and Technology)Institutes of Biomedical SciencesFudan UniversityShanghai200032China

Drug therapy is among the most widely used methods in disease ***,there remains a trade-off problem between drug dosage and *** purification by adsorption of excessive drugs during clinical treatment could be a solution for enhancing therapeutic efficacy while maintaining normal body ***,inspired by the intrinsic action mechanism of chemotherapeutic agents in targeting DNA in the cell nucleus,we present DNA-polyelectrolyte composite responsive microparticles for chemotherapeutics *** presence of DNA in the microparticles enabled the adsorption of multiple common chemotherapy ***,the microparticles are endowed with a porous structure and a photothermal-responsive ability,both of which contribute to improved adsorption by enhancing the contact of the microparticles with the drug *** the basis of that,the microparticles are integrated into a herringbone-structured microfluidic *** fluid mixing capacity and the enhanced drug cleaning efficiency of the microfluidic platform are validated *** results indicate the value of the DNA-polyelectrolyte composite responsive microparticles for drug capture and blood *** believe the microparticle-integrated microfluidic platform could provide a solution for settling the dosage-toxicity trade-off problems in chemotherapy.

关键词： dosage drugs chemotherapy

Strict Neighbor-Distinguishing Total Index of Graphs

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Acta Mathematica Sinica,English Series 2022年第4期38卷 770-776页

作者： Jing GU Wei Fan wang Yi qiao wang Department of Mathematics Zhejiang Normal UniversityJinhua 321004P.R.China School of Management Beijing University of Chinese MedicineBeijing 100029P.R.China

A total-coloring of a graph G is strict neighbor-distinguishing if for any two adjacent vertices u and v,the set of colors used on u and its incident edges and the set of colors used on v and its incident edges are not included with each *** strict neighbor-distinguishing total indexχ"_(snd)(G)of G is the minimum number of colors in a strict neighbor-distinguishing total-coloring of *** this paper,we prove that every simple graph G withΔ(G)≥3 satisfiesχ"_(snd)(G)≤2Δ(G).

关键词： Strict neighbor-distinguishing total-coloring Strict neighbor-distinguishing total index Maximum degree

Passive control of Permanent Magnet Synchronous Motor chaotic system based on state observer

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2006年第12期7卷 1979-1983页

作者： QI Dong-lian wang qiao School of Electrical Engineering Zhejiang University Hangzhou 3 I0027. China

Passive system theory was applied to propose a new passive control method with nonlinear observer of the Permanent Magnet Synchronous Motor chaotic system. Through constructing a Lyapunov function, the subsystem of the Permanent Magnet Synchronous Motor chaotic system could be proved to be globally stable at the equilibrium point. Then a controller with smooth state feedback is designed so that the Permanent Magnet Synchronous Motor chaotic system can be equivalent to a passive system. To get the state variables of the controller, the nonlinear observer is also studied. It is found that the outputs of the nonlinear observer can approximate the state variables of the Permanent Magnet Synchronous Motor chaotic system if the system’s nonlinear function is a globally Lipschitz function. Simulation results showed that the equivalent passive system of Permanent Magnet Synchronous Motor chaotic system could be globally asymptotically stabilized by smooth state feedback in the observed parameter convergence condition area.

关键词： Permanent Magnet Synchronous Motor Passive system State observer

Vaporization model of MgCl2-CaCl2 binary melts in fluidized bed

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Chinese Journal of Chemical Engineering 2017年第1期25卷 123-129页

作者： qiao wang Qingshan Zhu Chuanlin Fan Zhen wang Hongzhong Li State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

The present study investigated the vaporization kinetics of MgCl_2,CaCl_2 and their binary melts in a fluidized bed at1073-1273 K,and developed a vaporization model for the binary melts to explore the possibility of achieving enhanced vaporization rate for the feedstock containing CaO greater than 0.2 wt%.The vaporization rate constant of MgCl_2 is more than seven times than that of CaCl_2 at 1273 *** vaporization rate of the binary melt was significantly affected by the composition,a small quantity of CaCl_2 can remarkably deteriorate the overall vaporization *** results coincide well with the numerical simulation by the vaporization model which regards the evolution of vaporization rate with melts composition.A correlation between the necessary operation temperature and the CaO/(CaO + MgO) of the feedstock was *** reveal that a similar vaporization rate for 0.2 wt%-0.4 wt%CaO content feedstock with 0.2 wt%could be achieved at lower than 1365 K.

关键词： MgCl2 CaCl2 Binary melts Vaporization kinetics Kinetics model