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Paramonohystera weihaiensis ***.(Xyalidae,Nematoda) from the intertidal beach of the Yellow Sea, China

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Journal of Oceanology and Limnology 2019年第4期37卷 1403-1408页

作者： HUANG Yong sun jing College of Life Sciences Liaocheng University Liaocheng 252059 China Key Laboratory of Ecology and Biodiversity of Shandong Colleges and University Liaocheng 252059 China

A new species of free-living marine nematode of the genus Paramonohystera was described from the intertidal beach, Weihai. Paramonohystera weihaiensis sp. nov. is characterized by cervical region with a circle of long setae;tail sexual dimorphism, male tail angled dorsally with sharp narrowed of the body at the cloaca, female tail ordinary conico-cylindrical;spicules slender, 2.5 abd long;gubernaculum plate, enlarged distal end with two teeth, without apophysis;precloacal supplements absent;Four caudal gland cells obviously extended to tail. The new species differs from the other fourteen known valid congeners by the combination of its characteristics:a circle of long cervical setae, tail sexual dimorphism, spicules slender, 2.5 abd long, gubernaculum plate with a distal pair of teeth.

关键词： new species free-living marine nematode taxonomy

A pyramid-based approach to visual exploration of a large volume of vehicle trajectory data

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Frontiers of Earth Science 2012年第4期6卷 345-353页

作者： jing sun Xiang LI Key Laboratory of Geographical Information Science (Ministry of Education) East China Normal University Shanghai 200062 China

Advances in positioning and wireless commu- nicating technologies make it possible to collect large volumes of trajectory data of moving vehicles in a fast and convenient fashion. These data can be applied to traffic studies. Behind this application, a methodological issue that still requires particular attention is the way these data should be spatially visualized. Trajectory data physically consists of a large number of positioning points. With the dramatic increase of data volume, it becomes a challenge to display and explore these data. Existing commercial software often employs vector-based indexing structures to facilitate the display of a large volume of points, but their performance downgrades quickly when the number of points is very large, for example, tens of millions. In this paper, a pyramid-based approach is proposed. A pyramid method initially is invented to facilitate the display of raster images through the tradeoff between storage space and display time. A pyramid is a set of images at different levels with different resolutions. In this paper, we convert vector-based point data into raster data, and build a grid- based indexing structure in a 2D plane. Then, an image pyramid is built. Moreover, at the same level of a pyramid, image is segmented into mosaics with respect to the requirements of data storage and management. Algorithms or procedures on grid-based indexing structure, image pyramid, image segmentation, and visualization operations are given in this paper. A case study with taxi trajectory data in Shanghai is conducted. Results demonstrate that the proposed method outperforms the existing commercial software.

关键词： large volumes of trajectory data visualization grid-based indexing structure image pyramid

OPTIMUM ORDERING POLICY FOR PREVENTIVE AGE REPLACEMENT

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Journal of Systems Science and Systems Engineering 2009年第3期18卷 283-291页

作者： Young T. PARK jing sun Department of Systems Management Engineering Sungkyunkwan University School of Economics and Management Tsinghua University Beijing 100084 China

Most of the spare ordering policies treated up to now have assumed that preventive and corrective replacement costs are equal, which implies in essential that there is no significant need for preventive replacement. This paper presents an ordering policy for preventive age replacement with minimal repair. Introducing the replacement, repair, inventory holding and shortage costs, the expected cost rate is derived. A procedure to determine jointly the ordering time for a spare and the preventive replacement time for the operating unit so as to minimize the expected cost rate is proposed. To explain the ordering policy and the optimization procedure, a numerical example is also included.

关键词： Ordering policy spare age replacement minimal repair

Identifi cation of model structure parameters via combination of AFMM and ARX from seismic response data

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Earthquake Engineering and Engineering Vibration 2014年第3期13卷 411-423页

作者： Gong Maosheng sun jing Xie Lili Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering Mechanics CEA Institute of Civil Engineering Heilongjiang University

To identify the model structure parameters in shaking table tests from seismic response, especially from time- varying response records, this paper presents a new methodology by combining the online recursive Adaptive Forgetting through Multiple Models （AFMM） and offtine Auto-Regression with eXogenous variables （ARX） model. First, the AFMM is employed to detect whether the response of model structure is time-invariant or time-varying when subjected to strong motions. Second, if the response is time-invariant, the modal parameters are identified from the entire response record, such as the acceleration time-history using the ARX model. If the response is time-varying, the acceleration record is divided into three segments according to the accurate time-varying points detected by AFMM, and parameters are identified by only using the tail segment data, which is time-invariant and suited for analysis by the ARX model. Finally, the changes in dynamic properties due to various strong motions are obtained using the presented methodology. The feasibility and advantages of the method are demonstrated by identifying the modal parameters of a 12-story reinforced concrete （RC） frame structure in a shaking table test.

关键词： parameter identification time-varying response model structure shaking table test

Advances of graphene application in electrode materials for lithium ion batteries

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Science China(Technological Sciences) 2015年第11期58卷 1829-1840页

作者： LU XiaoYu JIN XiHai sun jing State Key Lab of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences

The demands for better energy storage devices due to fast development of electric vehicles(EVs) have raised increasing attention on lithium ion batteries(LIBs) with high power and energy densities. In this paper, we provide an overview of recent progress in graphene-based electrode materials. Graphene with its great electrical conductivity and mechanical properties have apparently improved the performance of traditional electrode materials. The methods and electrochemical properties of advanced graphene composite as cathode and anode for LIBs are reviewed. Two novel kinds of graphene hybrid materials are specially highlighted: three-dimensional porous and flexible binder-free graphene-based materials. Challenges for LIBs and future research trend in the development of high-performance electrode materials are further discussed.

关键词： lithium ion batteries (LIBs) graphene cyclability rate capability nanomaterials three dimensional structure flexibleand binder-free electrode

Towards Understanding Why the Thin Membrane Transducer Deforms:Surface Stress-Induced Buckling

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Acta Mechanica Solida Sinica 2016年第2期29卷 192-199页

作者： Jianlin Liu jing sun Pingcheng Zuo Department of Engineering Mechanics College of Pipeline & Civil EngineeringChina University of Petroleum(East China)

This study is directed towards a comprehensive exploration on the deformation mechanism of the thin membrane transducer（TMT） caused by surface stress *** stress that the biomolecular interaction has changed the magnitude of the surface stress;and when the surface stress exceeds a critical value the TMT will buckle and *** upon Gurtin＇s theory of surface elasticity and principle of finite deformation,we abstract the TMT as a nanobeam with two clamped ends,and the close-formed governing equation set is derived accordingly.A computer code via the shooting method is developed to solve the presented two-point boundary value *** succession,the nanobeam deflection and critical parameters for buckling are quantitatively *** investigation lays the theoretical foundation of TMTs;and it is also beneficial to gain deep insight into characterizing mechanical properties of nanomaterials and engineering nano-devices.

关键词： surface elasticity residual surface stress large deformation buckling transducer

Dynamic shear modulus of undisturbed soil under different consolidation ratios and its effects on surface ground motion

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Earthquake Engineering and Engineering Vibration 2013年第4期12卷 561-568页

作者： sun jing Gong Maosheng Tao Xiaxin Institute of Civil Engineering Heilongjiang University Key Laboratory of Earthquake Engineering and Engineering Vibration Institute of Engineering MechanicsChina Earthquake Administration School of Civil Engineering Harbin Institute of Technology

The dynamic shear modulus for three types of undisturbed soil under different consolidation ratios is presented by using the resonant column test method. Its effects on surface ground motion is illustrated by calculation. The test results indicate that the power function is a suitable form for describing the relationship between the ratio of the maximum dynamic shear modulus due to anisotropic and isotropic consolidations and the increment of the consolidation ratio. When compared to sand, the increment of the maximum dynamic shear modulus for undisturbed soil due to anisotropic consolidation is much larger. Using a one-dimensional equivalent linearization method, the earthquake influence factor and the characteristic period of the surface acceleration are calculated for two soil layers subjected to several typical earthquake waves. The calculated results show that the difference in nonlinear properties due to different consolidation ratios is generally not very notable, but the degree of its influence on the surface acceleration spectrum is remarkable for the occurrence of strong earthquakes. When compared to isotropic consolidation, the consideration of actual anisotropic consolidation causes the characteristic period to decrease and the earthquake influence factor to increase.

关键词： dynamic shear modulus consolidation ratio undisturbed soil resonant column test surface ground motion

Laser-Catalyzed Domain Formation in Spinor-1 Bose Condensates

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Chinese Physics Letters 2012年第11期29卷 13-16页

作者： JIANG Ya-jing sun jing-Xin jing Hui Department of Physics Henan Normal UniversityXinxiang 453007

We show theoretically that it is possible to optically control domain formation in a spinor-1^(87)Rb gas.A model is proposed to include the photoassociation(PA)interaction characterizing the symmetry breaking of MF=±1 ferromagnetic *** find that the dynamical process of the domain formation can be greatly controlled by the PA *** PA field can enhance or suppress the spatial separation of domains,which can provide a flexible tool to modulate the domain structure and indicate an interesting research field of laser-catalyzed in spinor condensate.

关键词： field symmetry breaking

An oscillating multiplier on Herz type spaces

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Applied Mathematics(A Journal of Chinese Universities) 2011年第1期26卷 93-103页

作者： CAO Wei sun Li-jing Department of Mathematics Zhejiang University Hangzhou 310027 China Department of Mathematical Science University of Wisconsin-Milwaukee Milwaukee WI 53217 USA

In this paper, the boundedness of an oscillating multiplier mγ,β for different β on the Herz type spaces is obtained. This operator was initially studied by Wainger and FeffermanStein. Our results extend one of the main results in a paper by Xiaochun Li and Shanzhen Lu for the non-weighted case, if β is close to 1 or α is suitably large. For β ≥ 1, the results with no weights on the Herz type spaces are also new.

关键词： Oscillating multiplier Herz space atomic decomposition.