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| 1 | ADAPTIVE REPAIR APPROACH FOR RECOVERING COMPONENTS FROM DEFECTS显示文摘The geometry of each worn part is unique,so that a repair has to be tailored to each part individually. To ensure that a high quality repair is carried out,tool paths have to be generated adaptively for the unique geometry and pose of the part being repaired. A polygonal modelling approach is introduced to rapidly construct a geometric model of the part to be repaired,together with a defect-free model with identical geometry and poise. The two models are compared so that the defects are identified for direct use by the laser cladding,machining and inspection processes. | GAO Jian CHEN Xin ZHENG Detao GINDY Nabil | 2008 | Chinese Journal of Mechanical Engineering2008，21，1： | 3 |
| 2 | Advantage of dual wavelength light-emitting diodes with dip-shaped quantum wells显示文摘Dual-wavelength light-emitting diodes (DW-LEDs) with dip-shaped quantum wells have been studied by numerical simulation.The emission spectra,light output power,carrier concentration in the quantum wells and internal quantum efficiency are investigated.The simulation results indicate that the DW-LEDs with dip-shaped quantum wells perform better than conventional LEDs with rectangular quantum wells in terms of light output power,leakage current and efficiency droop.These improvements in the electrical and optical characteristics are mainly attributed to the alleviation of the electrostatic field in the dip-shaped quantum wells. | XU YiQin FAN GuangHan ZHOU DeTao LI Xin LU TaiPing ZHAO Fang ZHANG YunYan ZHENG ShuWen GONG ChangChun | 2012 | Chinese Science Bulletin2012，57，20： | 2 |
| 3 | Adaptive restoration of complex geometry parts through reverse engineering application显示文摘 | Gao Jian Chen Xin Zheng Detao | 2006 | Advances in Engineering Software2006，37，9： | 1 |
| 4 | Adaptive restoration of complex geometry parts through reverse engineering application显示文摘 | Jian Gao Xin Chen Detao Zheng Oguzhan Yilmaz Nabil Gindy | 2006 | Advances in Engineering Software2006，，9： | 1 |
| 5 | Adaptive restora- tion of complex geometry parts through reverse engineering application 显示文摘 | Gao Jian Chen Xin Zheng Detao | 2006 | Advances in Engineering Software2006，，1： | 1 |
| 6 | Mathematical Representation of Feature Conversion for CAD/CAM System Integration显示文摘 | Gao Jian Zheng Detao Gindy N | 2004 | Robotics and Computer- Integrated Manufacturing2004，20，5： | 1 |
| 7 | Mathenatical repre- sentation of feature conversion for CAD/CAM system integra- tion 显示文摘 | GAO Jian ZHENG Detao GINDY Nabil | 2004 | Robotics and Computer-Integrated Manufacturing2004，20，5： | 1 |
| 8 | Mathematical Representation of Feature Conversion for CAD/CAM System Integration显示文摘 | Jian Gao Detao Zheng Nabil Gindy | 2004 | Robotics and Computer-Integrated Manufacturing2004，20，： | 1 |
| 9 | A preliminary study of a new high-resolution detector matrix applied to three-dimensional dose verification in intensity-modulated radiotherapy显示文摘Objective:To test the basic dosimetry characteristics of a new high-resolution matrix and to perform a preliminary study on the three-dimensional(3D)dose verification of intensity-modulated treatment(IMRT).Methods:The dosimetry characteristics of the new matrix were investigated,including repeatability,dose-rate response,and dose linearity.Twenty cases of nasopharyngeal carcinoma(NPC)and 20 cases with lung cancer were randomly selected for IMRT plans,and the novel matrix was employed for 3D dose verification.The measured results were evaluated using the gamma passing rate(GPR)and dose volume histogram(DVH).The action limit(AL)and tolerance limit(TL)of the target volume and each organ at risk(OAR)were calculated with reference to the American Association of Physicists in Medicine(AAPM)TG218 report.Results:The matrix performed well for all dosimetry characteristic tests,with a deviation of<1%.The average GPRs of the body were(99.32±0.32)%,(98.36±0.59)%,and(96.27±1.20)%for NPC,and(99.17±0.74)%,(98.09±1.33)%,and(95.83±2.22)%for lung cancer at the gamma standards of 3%/3 mm,3%/2 mm,and 2%/2 mm.The average GPRs difference between the head-neck and thorax-abdomen plans were<1%for the same gamma standard.For both the target volumes and OARs,the average GPRs were>90%under the relatively strict standard of 2%/2 mm.The DVH showed that the measurement results of D_(98) and D_(95) for the target volumes were slightly lower and D_(2) were higher than those of treatment planning system(TPS)(P<0.01).In addition,with the same standard,there may be significant differences in the values of AL and TL between different structures for target volumes and OARs,especially small-volume OARs such as the chiasma and optic nerve-L.Conclusions:The new matrix showed good dosimetry characteristics and can be effectively applied to the treatment planning dose verification of the head-neck and lung cancer.Further research is needed to establish how to analyze the GPR and DVH of the target volume and OARs,and to determine more precise dose verification standards combined with the parameters of AL and TL to better guide 3D dose verification in clinic. | Renchuan Zheng Along Chen Jinhan Zhu Lixin Chen Shengxiu Jiao Detao Xiao | 2021 | Radiation Medicine and Protection2021，2，3： | 0 |
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