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Now showing items 49 - 64 of 853

  • DOA AND POLARIZATION ESTIMATION ALGORITHM BASED ON THE VIRTUAL MULTIPLE BASELINE THEORY

    Wang, Guibao   Fu, Mingxing   Zhao, Feng   Liu, Xiang  

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  • Textiles and Clothing Excavated from the Tombs of Buzak in Khotan

    Zhao, Feng   Wang, Le  

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  • HIGH TEMPERATURE GASIFYING PROCESS WITH BIOMASS AND SYSTEM THEREOF

    High temperature gasifying process with biomass includes feeding, carbonization, powder making of charcoal, transporting of powdery charcoal and gasifying in gasifier, wherein carbonization is carried out in the carbonization furnace for pyrolysis of biomass with the heat released by the direct combustion of additionally provided combustible gas and oxygen, the product of carbonization is pyrolysis gas and charcoal. The temperature in the carbonization furnace is controlled at 400~600℃through adjusting the amount of oxygen, the molar number of combustible gas is greater than 1 and less than 5 based on that the molar number of combustible gas is 1 when it is completely combusted with oxygen. The temperature of the flame at the nozzle of the carbonization furnace is controlled at 1800~1200℃ through adjusting the amount of additionally provided combustible gas entering into the carbonization furnace. Powdery charcoal is formed through reducing the temperature of charcoal, reducing pressure, powder making, increasing pressure and fluidization, and the powdery charcoal is sent to gasifier through adjusting the transportation amount of the pyrolysis gas. The system for performing the process includes a carbonizing furnace, a powder-making system and so on.
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  • METHODS AND APPARATUSES FOR FACILITATING CONTENT-BASED IMAGE RETRIEVAL

    Methods and apparatuses are provided for facilitating content-based image retrieval. A method may include determining a selected target image. The method may further include generating a candidate region of interest set including one or more regions of interest within the target image. The method may additionally include determining a recommended region of interest set including one or more recommended regions of interest selected from the candidate region of interest set based at least in part upon evaluation criteria. The evaluation criteria may be determined based at least in part upon analysis of maintained region of interest-based searching history. The method may also include providing the recommended region of interest set for user selection of one or more target regions of interest from the recommended region of interest set as query criteria for searching an image library for one or more result images. Corresponding apparatuses are also provided.
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  • Antiviral anthraquinones from the roots of Knoxia valerianoides

    Zhao, Feng   Zhao, Shuai   Han, Jing-Tian   Wang, Yuan-Fang   Wang, Ya-Nan   Wang, Chun-Hua  

    Three new anthraquinones, (2S)-8-carboxy-9-hydroxy-2-(2-hydroxypropan-2-yl)-1,2-dihydroanthra[2,1-b] furan-6,11-dione (1), 1,2,3,6-tetrahydroxy-9,10-anthraquinone (2), and 1,2,3,5,6-pentahydroxy-9,10-anthraquinone (3), as well as four known 9,10-anthraquinones (4-7) and five known triterpenes (8-12), were isolated from the roots of Knoxia valerianoides. Their structures and the absolute configuration of 1 were determined through interpretation of spectroscopic data, including UV, IR, NMR and CD spectra. The isolates were evaluated for their antiviral activities, and compounds 1 and 4 showed inhibitory effects on Coxsackie virus B3 replication with IC50 values of 19.24 mu M and 11.11 mu M, respectively. Compound 4 showed activity against influenza virus A/Hanfang/359/95 with an IC50 value of 11.11 mu M. (C) 2014 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.
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  • New sesquiterpenes from the rhizomes of homalomena occulta

    Zhao, Feng   Sun, Chao   Ma, Li   Wang, Ya-Nan   Wang, Yuan-Fang   Sun, Ju-Feng   Hou, Gui-Ge   Cong, Wei   Li, Hong-Juan   Zhang, Xiao-Hua   Ren, Yan   Wang, Chun-Hua  

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  • POLYMER COMPOSITION WITH IMPROVED PROPERTIES AND PREPARATION METHOD THEREOF

    The present invention relates to a polymer composition with improved optical and surface properties and a preparation method thereof. The polymer composition comprises a) 1-90 wt% of a polyblend A comprising polybutadiene and a methyl methacrylate based polymer, b) 1-90 wt% of a polymer B, which is a methyl methacrylate based polymer, and c) 1-20 wt% of a copolymer C comprising 18-35 wt% maleic anhydride and 65-82 wt% styrene.
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  • CENTRALIZED CONTROL SYSTEM FOR INTELLIGENT LIGHTING STREET LAMP

    The present invention is applicable to a street lamp lighting system, and provided is a centralized control system for an intelligent lighting street lamp, comprising a remote monitoring centre, at least one centralized controller and at least one street lamp controller for controlling the working of a street lamp and monitoring a working state parameter of the street lamp in real time, wherein the centralized controller is connected to one or more street lamp controllers via a power line, and transceives the same information with the street lamp controller in two modes, namely, power line carrier communication (PLC) and radio communication (RF); and the street lamp controller is used for transmitting the monitored working state parameter of the street lamp to the remote monitoring centre via the centralized controller, and executing a corresponding control operation on the street lamp when receiving a monitoring instruction which is forwarded by the centralized controller and from the remote monitoring centre. The present invention can fully upgrade a city public lighting management system, thereby reducing energy waste, and achieving centralized management and controlling, informatized operation and maintenance, and intelligent lighting of street lamps.
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  • Activated Carbon Cloth as Anode for Sulfate Removal in a Microbial Fuel Cell

    Zhao, Feng   Rahunen, Nelli   Varcoe, John R.   Chandra, Amreesh   Avignone-Rossa, Claudio   Thumser, Alfred E.   Slade, Robert C. T.  

    By employing the sulfate-reducing bacterium Desulfovibrio desulfuricans we demonstrate the possibility of electricity generation in a microbial fuel cell (MFC) with concomitant sulfate removal. This approach is based on an in situ anodic oxidative depletion of sulfide produced by D. desulfuricans. Three different electrode materials, graphite foil (GF), carbon fiber veil (CFV), and high surface area activated carbon cloth (ACC), were evaluated for sulfide electrochemical oxidation. In comparison to CFV and GF electrodes, ACC was a superior material for sulfide adsorption and oxidation and showed significant potential for harvesting energy from sulfate-rich solutions in the form of electricity. Sulfate (3.03 g dm(-3)) was removed from a bacterial suspension, which represented 99% removal. A maximum power density of 0.51 mW cm(-2) (normalized to geometric electrode area) was obtained with a one-chamber, air-breathing cathode and continuous flow MFC operated in batch mode at 22 degrees C.
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  • Effect of fixation on neovascularization during bone healing

    Zhao, Feng   Zhou, Zhilun   Yan, Yang   Yuan, Zhen   Yang, Guanzhong   Yu, Hao   Su, Hao   Zhang, Tao   Fan, Yubo  

    Fixation and vascularity after bone fracture are two critical factors for successful healing, and their influences on bone healing have been studied by many researchers. This research aims to obtain three-dimensional (3D) reconstruction images of neovascularization of the soft tissues surrounding the fracture with vascular perfusion and micro-computer tomography (micro-CT) imaging, and to investigate the effect of stable fixation on neovascularization and the pattern of vascularity during the process of bone healing. To accomplish this, 36 Sprague-Dawley (SD) rats underwent mid-shaft transverse osteotomy of the right tibia. Half of them received stable fixation with a newly custom-designed external fixator (FSF, the group of fracture with stable fixation), while the rest received no fixation (FNF, the group of fracture with no fixation). The results indicated that FNF samples had more transversal vascular distribution than FSF samples; FSF samples had more longitudinal vascular distribution than FNF samples; and the spatio-temporal pattern of vascularity in FSF samples was more similar to that in the control group (CON, the group without fracture) than that in FNF samples. At the time of 2 and 4 weeks postoperatively, FNF samples had significantly higher vessel volume ratio (VV/TV), larger vessel number (VN) and higher vessel surface density (VS/TV) than CON samples. At all sacrifice times, FSF samples contained significantly higher VV/TV, VN and VS/TV values compared with FNF samples. In summary, neovascularization and its pattern are obviously influenced by the mechanical fixation. Stable fixation can promote longitudinal vascularity pattern formation, which tends to be similar to the natural vascularity pattern, and this benefits the inter-fragmentary blood fluid connectivity during bone healing process. (C) 2014 IPEM. Published by Elsevier Ltd. All rights reserved.
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  • Termination of paroxysmal supraventricular tachycardia with P6 acupressure

    Zhao, Feng   Cui, Suyang   Zheng, Man  

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  • FRAMEWORK AND APPLICATIONS FOR PROXIMITY-BASED SOCIAL INTERACTION

    A framework for use in developing proximity-based social interactions (PSIs) shows energy efficiency, topology robustness, and a lessened load for group participants. Implementations of the framework may include PSI-specific application hints to aggregate and schedule pending transmissions and match delivery requirement, topology structure and maintenance schemes that provide robustness and improve efficiency, and load-distributing group dissemination protocols.
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  • INORGANIC THERMAL INSULATION MATERIAL AND PREPARATION METHOD THEREOF

    An inorganic thermal insulation material and a preparation method thereof. The inorganic heat preservation material is obtained by mixing silica aerogel, soluble silicate, a compound in a structure of formula (I), antimony tin oxide and hollow glass beads, adding a coupling agent for modification, mixing with water and infiltrating into a glass fiber felt, and conducting hot-press forming. l≤n≤24 and X is F, Br, or Cl.
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  • Joint beamforming and power control for auction-based spectrum allocation in CoMP systems

    Zhao, Feng   Miao, Yantao   Chen, Hongbin  

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  • Electromagnetic Transient Simulation Model of UHVDC Transmission Based on PSASP Parameters

    Zhao, Feng   Lu, Jiali   Wu, Tao   Zhang, Hanzhi   Hao, Jing   Li, Ran   Hao, Lili   Ran, Ziqiang   Wang, Xinhao   Xie, Huan  

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  • Reunderstanding of Garden Type I Femoral Neck Fractures by 3-dimensional Reconstruction

    Du, Chang-ling   Ma, Xin-long   Zhang, Tao   Zhang, Hua-feng   Wang, Chen-guang   Zhao, Feng   Ma, Jian-xiong   Fu, Xin   Li, Zhi-jun  

    Garden type I fractures include incomplete fractures and impacted fractures. With advances in scientific technology and medical treatment, certain deficiencies of the Garden classification have become apparent. The authors hypothesized that the incidence of incomplete femoral neck fractures was low and that impacted femoral neck fractures were not undisplaced and stable fractures. A new method was developed to precisely measure the spatial displacement of the femoral head in impacted femoral neck fractures. Between 2008 and 2011, nine hundred sixty-six patients with femoral neck fractures were treated, 48 of whom had Garden type I fractures, as seen on anteroposterior radiographs. Seven fractures were classified as incomplete on radiographs; however, after 3-dimensional reconstruction, 3 were classified as incomplete and 4 as complete fractures. Furthermore, the remaining 41 Garden I fractures that were classified as impacted on radiographs showed large spatial displacement on 3-dimensional reconstruction. The average rotational displacement of the femoral head was 19.29 degrees +/- 10.51 degrees, and the average displacements of the femoral head center and the lowest point of the fovea capitis were 8.76 +/- 4.45 and 14.39 +/- 8.08 mm, respectively. This study showed that the incidence of incomplete femoral neck fractures was low. Impacted femoral neck fractures showed variable degrees of displacement and were not undisplaced, stable fractures. Garden classification for impacted femoral neck fractures has certain limitations. Impacted femoral neck fractures should be differentiated from Garden type I fractures so clinicians can select appropriate treatments for these fractures.
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