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Now showing items 1 - 16 of 3198

  • PARAMETER CALIBRATION METHOD, DEVICE, AND SYSTEM FOR X-RAY MACHINE

    A parameter calibration method, device, and system for an X-ray machine. The method comprises: controlling a rotating arm of an X-ray machine to rotate about and scan a standard phantom, and acquiring projection results of the standard phantom at multiple preset rotation positions (S110); recording, at each of the preset rotation positions, a mechanical structure motion state of the rotating arm (S120); calibrating, at each of the preset rotation positions and according to the projection results of the standard phantom, an error parameter to obtain a calibration result of the error parameter (S130); and generating, according to the mechanical structure motion state of the rotating arm at each of the preset rotation positions and the calibration result of the error parameter, a dynamic correction matrix for correcting an actual project result of the X-ray machine (S140).
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  • Multi-level chirality in liquid crystals formed by achiral molecules

    Salamończyk, Mirosław   Vaupotič, Nataša   Pociecha, Damian   Walker, Rebecca   Storey, John M. D.   Imrie, Corrie T.   Wang, Cheng   Zhu, Chenhui   Gorecka, Ewa  

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  • STAINLESS STEEL AND PLASTIC COMBINED PIECE AND PROCESSING METHOD THEREFOR

    A stainless steel and plastic combined piece and a processing method therefor. The combined piece comprises a stainless substrate (1). When etched by an etchant, the surface of the stainless steel substrate (1) is provided with several recessed structures (11). The average depth of the recessed structures (11) is 0.1-30 micrometers and the average width is 0.2-15 micrometers. A plastic (2) is injection molded on the stainless steel substrate (1). Parts of the structure of the plastic (2) are embedded in the recessed structures (11). The recessed structures (11) formed when the stainless steel substrate (1) is etched by the etchant are of the micrometer level, the combined piece is provided with improved stability and increased airtightness when the plastic (2) is injection molded, thus reducing process steps, reducing production costs, being applicable in large-scale production, placing no special material requirement with respect to the injection molded plastic (2), and having a widened range of applications.
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  • STAINLESS STEEL AND PLASTIC COMBINED PIECE AND PROCESSING METHOD THEREFOR

    A stainless steel and plastic combined piece comprising a stainless steel substrate (1). The stainless steel substrate is provided on the surface thereof with honeycomb pores (11). The stainless steel substrate is provided on the surface thereof with a nitrided layer by means of a solid solution nitriding treatment. The thickness of the nitrided layer is greater than 10 nm. A plastic material (2) is injection molded on the stainless steel substrate. The plastic material is embedded into the honeycomb pores. Also disclosed is a processing method for the stainless steel and plastic combined piece. The combined piece increases the binding force between the stainless steel substrate and the plastic material.
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  • METHOD AND DEVICE FOR TRACKING RIDGE LINE OF BLOOD VESSEL

    A method and device for tracking a ridge line of a blood vessel. The method comprises: performing global ridge point detection on an angiographic image to determine a ridge point space (101); randomly selecting a ridge point in the ridge point space as a tracking starting point, and determining two neighboring ridge points and two initial tracking directions of the tracking starting point on a tracking ridge line (102); using the two neighboring ridge points as end points, separately sequentially tracking other ridge points on the tracking ridge line along the two initial tracking directions, and continuously updating end points and current tracking directions in a tracking process (103); marking a tracked ridge line, deleting traversed ridge points on the tracked ridge line, and updating the ridge point space (104); and repeating a ridge line tracking process according to the updated ridge point space until the number of ridge points in the updated ridge point space is less than a first threshold value, and then ending ridge line tracking (105). The method features fewer iteration parameters, small amount of computation, and a simple algorithm, and can quickly completing ridge line tracking of a vascular centerline.
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  • Penetration of shaped charge into layered and spaced concrete targets

    Wang, Cheng   Xu, Wenlong   Chung Kim Yuen, Steeve  

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  • A novel limiting current oxygen sensor prepared by slurry spin coating

    Wang, Cheng   Liu, Tao   Wang, Xiangnan   Li, Jingyun   Jin, Hongbin   Yu, Jingkun   Yi, Maoyi   Mo, Yangcheng  

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  • Study on heating mechanism of GRP rod in a composite insulator

    Yuan, Zhikang   Tu, Youping   Jiang, Han   Wang, Cheng   Wang, Cong  

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  • Image Captioning with Deep Bidirectional LSTMs and Multi-Task Learning

    Wang, Cheng   Yang, Haojin   Meinel, Christoph  

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  • Controllable and flexible cellular network for virus cell-to-cell spread

    Yan, Qiong   Wang, Cheng   Wang, Ji   Pan, Liangjun   Zhang, Zhiling  

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  • Production of a large area diffuse arc plasma with multiple cathode

    Wang, Cheng   Cui, Hai-Chao   Li, Wan-Wan   Liao, Meng-Ran   Xia, Wei-Luo   Xia, Wei-Dong  

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  • Filling the Gap: Silicon Terahertz Integrated Circuits Offer Our Best Bet

    Han, Ruonan   Hu, Zhi   Wang, Cheng   Holloway, Jack   Yi, Xiang   Kim, Mina   Mawdsley, James  

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  • Energy saving with Optic-Variable Wall for stable air temperature control

    Wang, Cheng   Guo, Xiaofeng   Zhu, Ye  

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  • Aitken-Based Stochastic Gradient Algorithm for ARX Models with Time Delay

    Wang, Cheng   Li, Kaicheng  

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  • Simulating Powder X-ray Diffraction Patterns of Two-Dimensional Materials

    Jiang, Yibin   Cao, Lingyun   Hu, Xuefu   Ren, Zikun   Zhang, Cankun   Wang, Cheng  

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  • Observation of arc modes in a magnetically rotating arc plasma generator

    Wang, Cheng   Cui, Haichao   Zhang, Zelong   Xia, Weiluo   Xia, Weidong  

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