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RISS 인기검색어
- 검색키워드
- 저자 : Ce Fu (검색결과 3 건)
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Closed T-Spline Surface Reconstruction from Medical Image Data
Ce Shang,Jianzhong Fu,Zhiwei Lin,Jiawei Feng,Bin Li 한국정밀공학회 2018 International Journal of Precision Engineering and Vol.19 No.11
The reconstruction from medical image data to CAD model is an essential process of Bio-medical engineering. So far, it is still challenging to create medical model which is suitable for both design and manufacturing. This paper introduces a process of constructing a single-patched closed T-spline surface model based on medical image data. The image data is first converted into triangular mesh and then parameterized onto a rectangular domain. An iterative least-squares fitting process is proposed to finally obtain the T-spline surface model with a user-specified tolerance. In this fitting process, the smoothing part of the algorithm is redesigned, considering the flexible structure of T-mesh and the geometric complexity of the T-spline surface. Local smoothness weighting factors are introduced to the fitting formula to locally adjust the smoothness of the surface. An adaptive smoothness checking points distribution method is proposed to reduce the computational cost. These algorithms are easy to implement and the obtained model is simple in form. Compared with the STL and NURBS model, the T-spline surface model requires less storage space and can be easily modified. The obtained model is suitable for Bio-medical engineering applications like bone scaffolds design, surgical planning and related manufacturing process.
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Research on the structure design of the LBE reactor coolant pump in the lead base heap
Yonggang Lu,Rongsheng Zhu,Qiang Fu,Xiuli Wang,Ce An,Jing Chen 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.2
Since the first nuclear reactor first critical, nuclear systems has gone through four generations of history,and the fourth generation nuclear system will be truly realized in the near future. The notions of SVBRand lead-bismuth eutectic alloy coolant put forward by Russia were well received by the internationalnuclear science community. Lead-bismuth eutectic alloy with the ability of the better neutron economy,the low melting point, the high boiling point, the chemical inertness to water and air and other features,which was considered the most promising coolant for the 4th generation nuclear reactors. This studymainly focuses on the structural design optimization of the 4th-generation reactor coolant pump,including analysis of external characteristics, inner flow, and transient characteristic. It was found that:the reactor coolant pump with a central symmetrical dual-outlet volute structure has better radialdirectionbalance, the pump without guide vane has better hydraulic performance, and the pumpwith guide vanes has worse torsional vibration and pressure pulsation. This study serves as experienceaccumulation and technical support for the development of the 4th generation nuclear energy system.
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