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  • FAN Jing,WU Jiamin,YE Yang,WU Dongyan,WANG Hao
    .
    Abstract:The traditional panorama stitching technique based on manifold cant retain the contents
    of particular key areas in videos.The ability to express the motion information of video is poor
    and the speed is slow.In order to solve these problems,an efficient panoramic stitching method
    with significant region constraint is presented.Based on the manifold video stitching and the
    image feature points,this method will set significant area to generate the panorama with
    constraint for key frames firstly.Then the panoramas in the key frames are aligned and fused to
    obtain the motion panorama.The CUDA parallel computing is used to speed up.The
    experimental results showed that the proposed method can not only retain the specific form of
    specific object at a certain moment,but also can keep multiple movement patterns of moving
    objects in the panorama.It can effectively improve the speed of image stitching.
  • LIANG Xianrui,CHEN Xinlei
    .
    A novel synthesis method of (S)type ionic liquid immobilized imidazolethinones was reported in this paper.(S)3(3(1HImidazol1yl)propyl)5benzyl2,2dimethylimidazolidin4one was synthesized from Lphenylalanine via Bocprotection, amidation, Bocdeprotection, cyclization. Then it was followed the sulfurated reaction with using Lawesson reagent as sulfuration agent in toluene at 80 ℃ for 8 hrs to give the chiral imidazolethinone in high ee value. The reaction of the obtained imidazolethione with niodobutane produced the (S)type ionic liquid immobilized imidazolethinone. The Bocdeprotection product was obtained in quantitative yield by using the HCl/1,4dioxane as reaction reagents.
  • . 2016, 44(6): 608-613.
     The Revit 3Dbuilding model reconstructed in the browser combining WebGL and BIM
    technology can help user browsing 3D model in the browser conveniently.This article aims to
    reconstruct Revit 3Dbuilding model with full information.Through Revit API,the file of Revit
    3Darchitecture model can be converted to JSON format file with geometric information and
    property Information.Then the WebGL is used to parse JSON file in order to achieve Revit
    Architecture 3Dmodel reconstruction in the PC browser and mobile browser.In the meantime,a
    associated method between model object in JSON file and attribute information associated with
    the model is proposed.The LOD optimization algorithm based on Revit family in big scene is put
    forward.
  • DU Lihua,XU Liangliang,CHENG Bingzhuo
    .
    Abstract:In order to increase the fat-soluble of naringin which can make it obtain better
    bioavailability,vinyl esters(vinyl acetate,vinyl laurate,vinyl palmitate)were as the acyl donor
    to attack the naringin,the selective esterification were catalyzed by lipase TL IM from
    thermomyces lanuginosus.The volume ratio of solvents,mole ratio of substrate,temperature
    and time of the reaction were taken as the influence factors and explored systematically.As a
    result,all of factors can influence the reaction in different degrees and under the optimum
    condition the yield can reach about 85%.
  • .
  • LIANG Lihua,XIE Dan,JIANG Lizheng
    .
    Focusing on the assembly quality and reliability of the automatic interference fit for
    elbow,a simulation research on interference fit of the elbow is performed by using ANSYS,then
    the result is compared with formula of experience calculated,and experiments were carried out to
    verify it.The results show that the formula of experience calculated only considered about liner
    elastic deformation,which has a large deviation with the experiment result.The simulation result
    is close to the experiment result.Further simulation studies show that assembly stability is
    influenced by chamfer,and initial intrusive force is in direct ration to both interference amounts
    and yield limit of material.With the increase of displacement quantity of assembly,the intrusive
    force become be inverse ratio to both interference quantity and yield limit of material,and in the
    condition of the same quantity of interference,the thickness of elbow is in direct ration to
    intrusive force.
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  • HU Xiaxia,SONG Binbin,DAI Xiaoxia,LIU Xiaoman
    .
    Abstract:The problems of uneven load distribution and impact are caused by a curvature radius
    variation and a single-double meshing area in the process of gear meshing.Contact models and
    contact stresses are studied based on the Hertz contact theory.Synthetical curvature radii in
    different meshing positions are obtained after analysis,and by using an envelope line a continuous
    curve is drawn,and a characteristic surface based on the curve is generated.A gear contact model
    and a curved surface-plane contact model are analyzed through Finite Element method.The
    results indicate that the stress distributions of the two contact models are similar,the simplified
    gear contact model may provide a reference basis for gear contact stress experiment analysis.
  • ZHANG Yuanming,CHEN Miao,LU Jiawei,XU Jun, XIAO Gang
    .
    In order to improve the flexibility of data extraction from complex unstructured form document, this paper proposes an extraction approach and a structured data model. The document structural features and data flow characteristics of unstructured form document are studied in details. A set of data flow generation rules are concluded. A data extraction process including logical structure extraction, document preprocessing, data extraction, and data organization, is designed. Two extraction algorithms for singlevalue area and multivalue area of document are implemented. The extracted data are organized into a structured data model that is designed to facilitate data analysis by MapReduce. Experimental results show that the proposed approach has great accuracy rate and recall rate. The structured data model also can effectively meet the requirements of data analysis by MapReduce.
  • YANG Xuhua,LING Fei
    .
    Abstract:The common neighbors index is often used in the study of link prediction in the past
    research.Based on the topological information of local community networks,global information
    such as co-ordination coefficients is also introduced into the prediction algorithm,but the LCII
    prediction algorithm is proposed based on local community and global information.Several real
    networks are employed to simulate the link prediction.It is found that LCII gets better
    effectiveness of prediction compared with CAR and CN.The results denote that the new contents
    of LCII index,which consist of local community and global information,can provide more
    information between candidate nodes.Therefore the LCII index has better link prediction
    performance.
  • HUANG Hong,CHEN Derui
    .
    Abstract:The existing Chinese sentence similarity algorithms based on semantic dependency only
    consider the effective word pairs based on the core word.Depending on whether or not the words
    in the effective word pairs of two sentences are same words or synonyms,it simply sets the
    matching weight to 0,0.5or 1.Those words which are not depended on the core word directly
    are not considered.This results in a bad discrimination in sentence similarity computing.In order
    to get a comprehensive characterization of sentence semantics and improve the accuracy and
    discrimination of the algorithm,the improved algorithm sets a more precise matching weight by
    computing the similarity of the core words and the key words,those words which are not
    depended on the core word directly are taken into the sentence similarity computation as well.
    The experimental results show that the improved algorithm has better accuracy and better
    discrimination than the original algorithms.
  • WANG Wenxi 1,CHEN Lina1,HUANG Xinyan2
    .
    In order to prepare minoxidil loaded solid lipid nanoparticles(MXD-SLN)and evaluate
    its quality and skin permeation,the MXD-SLN was prepared by a hot high pressure
    homogenization method,in which stearic acid was used as solid lipid while tween 80and span 80
    were used as surfactant.The particle size and zeta potential of SLN was measured with a
    DelsaTM Nano C Particle Analyzer.The entrapment efficiency(EE)and drug loading capacity
    (DL)of MXD in SLN dispersions were determined by a centrifugation method.In vitro drug
    release and skin permeation were conducted using transdermal diffusion test apparatus.The
    average particle size was(422.2±10.2)nm with PDI of(0.210±0.024)and the zeta potential
    was(-31.29±3.20)mV.The average EE and DL of MXD-SLN dispersions were(66.34±
    1.42)%and (8.12±0.23)%,respectively.The in vitro drug release test indicated that the
    MXD-SLN has a sustained-release performance.Moreover,the skin permeation study showed
    that SLN is suitable for the transdermal administration.All these results demonstrate the
    developed MXD-SLN possesses satisfactory qualities and a better application prospect. 
  • XU Yangjian, WU Pengwei, XU Lei, LIANG Lihua
    .
    The effects of particle volume fraction, particle diameter, particle material property and void etc. on particle reinforced composites were studied. A twodimensional RVE model was built by programming, and the periodic displacement boundary conditions were given. Homogenization method was implemented by second development in the platform of ABAQUS, and the mechanical response of RVE was calculated and analyzed by using this method. The study shows that the influence range of softening particles on the mechanical properties of the matrix is larger than reinforcing particles, and its mechanical properties were greatly weakened by the void defects.
  • .
    In order to improve the hysteresis problem of adaptive transit priority control of isolated intersection, the predicted minimum green split for each phase in each intersection is computed based on predicted traffic states firstly; then the punctual headway and the passenger occupancy rate are selected as indices to optimize the bus weight on each phase and the objective function is built with minimizing the average bus waiting time as the target. The proposed methods not only reduce delay of competitive phases, but also increase the rates of transit priority. The results show that the traffic trend can be captured through short-term prediction, which can be used to optimize green split for each phase, improve accuracy of phase model and decrease both person and vehicle delay for isolated intersection. 
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  • CHEN Tingting1,HUANG Jin1,CHEN Weiqing2,WANG Pu1
    .
    A pre-column derivatization-high performance liquid chromatographic(HPLC)method
    was established for the determination of L-tert-leucine(L-Tle)with 2,3,4,6-tetra-O-acetyl-β-Dglucopyranosyl
     isothiocyanate(GITC)as a chiral derivatization reagent.L-Tle was derivatized
    with GITC and the conditions of derivatization such as the quantity of GITC and the derivatized
    time were optimized.The resulting samples were analyzed by HPLC using an InterSustain C18
    column (250×4.6 mm,5μm).The mobile phase was a 58∶42 mixture of methanol and
    phosphate buffer(pH=2.8).The flow rate was 0.6mL/min,and the detection wavelength was
    254nm.The column temperature was 30 ℃ and injection volume was 10μL.The obtained
    diastereomers of L-Tle were well separated,and had good linear relationship in the concentration
    range of 0.2~1.0mmol/L(r=0.999 6).This method is accurate,reliable and available for the
    determination of L-Tle.
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