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AUTOMATIC DEFECTS DETECTION BASED ON ADAPTIVE WAVELET PACKETS FOR LEATHER manufacture

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AUTOMATIC DEFECTS DETECTION BASED ON ADAPTIVE WAVELET PACKET...

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： HE Fuqiang, wang wen , chen zichen institute of advanced manufacture engineering, Zhejiang University, Hangzhou 310027, China

The visual inspection system for leather surfaces was developed to quality control and raw material cut, an important component of automatic CAD/CAM cutting systems. The industrial detection of leathe

关键词： defect detection wavelet packet leather inspection.

DESIGN OF FAULT DIAGNOSIS SYSTEM FOR 3D LASER SCANNING MACHINE BASED ON INTERNET

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DESIGN OF FAULT DIAGNOSIS SYSTEM FOR 3D LASER SCANNING MACHI...

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： LU Keqing, wang wen, chen zichen institute of advanced manufacture engineering, Zhejiang University, Hangzhou 310027,China

According to the weakness of 3D Laser Scanning Machine in fault diagnosis, a new design approach for fault diagnosis has been developed. The new system consists of three layers, including the local fa

关键词： Laser scanning machine fault diagnosis agent web service.

CNC NON-CONTACT MEASURING SYSTEM FOR FREEFORM SURFACE

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Chinese Journal of Mechanical engineering 2002年第2期15卷 103-106页

作者： JuHua wang wen chen zichen Li Jian wang Hengkui institute of Production engineering, Zhejiang University, Hangzhou 310027, China institute of Production engineering Zhejiang University Hangzhou 310027

Developing CNC measuring method on the base of coordinate machine can makethe best of the hardware resource of CNC system and realize the integration of CAD/CAM/CAT. Based onthe evenly spaced parallel planes scanning, a new adaptive digitizing approach for freeform surfacenamely arc length extrapolation is put forward. By this way, the digitizing approach can be addedto the CNC system, while the system's hardware and software are not changed.

关键词： Reverse engineering Freeform surface digitalization CNC non-contactmeasurement Arc extension

NON-CONTACT MEASUREMENT SYSTEM OF FREEFORM SURFACE AND NURBS RECONSTRUCTION OF MEASUREMENT POINTS

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Chinese Journal of Mechanical engineering 2002年第4期15卷 366-371页

作者： Li Jian wang wen chen zichen institute of advanced Manufacturing engineering, Zhejiang University, Hangzhou 310027, China institute of advanced Manufacturing engineering Zhejiang University Hangzhou 310027 institute of advanced Manufacturing engineering Zhejiang University Huangzhou 310027

Based on the development of the non-contact measurement system of free-formsurface, NURBS reconstruction of measurement points of freeform surface is effectively realized bymodifying the objective function and recursive procedure and calculating the optimum number ofcontrol points. The reconstruction precision is evaluated through Ja-cobi's transformation *** feasibility of the measurement system and effectiveness of the reconstruction algorithm aboveare proved by experiment.

关键词： freeform surface non-contact measurement NURBS precision evaluation

STUDY ON ALGORITHM TO GENERATING QUINTIC SPLINE CURVE

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STUDY ON ALGORITHM TO GENERATING QUINTIC SPLINE CURVE

2006年中国机械工程学会年会暨中国工程院机械与运载工程学部首届年会

作者： JI Guoshun, wang wen, chen zichen institute of advanced Manufacturing engineering, Zhejiang University, Hangzhou 310027, China

Quintic spline curve based on arc length parameterization can realize second derivative continuity of combined curve, so the smooth transition for feed rate, acceleration and jerk could be ensured in

关键词： Quintic spline curve arc length parameterization iterative improvement method adaptive interpolation.

STUDY ON EDGE DETECTION BASED ON SAMPLING IN CNC NON-CONTACT MEASURING SYSTEM

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STUDY ON EDGE DETECTION BASED ON SAMPLING IN CNC NON-CONTACT...

2006年中国机械工程学会年会暨中国工程院机械与运载工...

作者： wang wen, LU Keqing, chen zichen institute of advanced Manufacturing engineering, Zhejiang University, Hangzhou 310027, China

Along with the rapid development of aerospace, automobile, die & mold industries, free-form surface products are widely used, and the measurement and reverse engineering of free-form surface products

关键词： Non-contact measurement edge detection sampling free-form surface.

ChemDFM-X: towards large multimodal model for chemistry

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Science China(Information Sciences) 2024年第12期67卷 99-100页

作者： Zihan ZHAO Bo chen Jingpiao LI Lu chen Liyang wen Pengyu wang zichen ZHU Danyang ZHANG Yansi LI Zhongyang DAI Xin chen Kai YU X-LANCE Lab Department of Computer Science and EngineeringMoE Key Lab of Artificial Intelligence AI Institute Shanghai Jiao Tong University Suzhou Laboratory

Chemistry, as a naturally multimodal discipline, plays a crucial role in various vital fields such as pharmaceutical research and material manufacturing. Therefore, research on artificial intelligence(AI) for chemistry has garnered increasing attention. Despite the rapid development, most of the chemical AI models today mainly focus on single tasks with unimodal input [1].

关键词：

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Influence of Al_(2)0_(3) content on mechanical properties of silica-based ceramic cores prepared by stereolithography

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Journal of advanced Ceramics 2021年第6期10卷 1381-1388页

作者： wen ZHENG Jia-Min WU Shuang chen Chang-Shun wang Chun-Lei LIU Shuai-Bin HUA Kang-Bo YU Jie ZHANG Jing-Xian ZHANG Yu-Sheng SHI State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China engineering Research Center of Ceramic Materials for Additive Manufacturing Ministry of EducationWuhan 430074China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Silica ceramic cores have played an important part in the manufacture of hollow blades due to their excellent chemical stability and moderate high-temperature mechanical *** this study,silica-based ceramics were prepared with Al_(2)0_(3) addition by stereolithography,and the influence of Al_(2)0_(3) content on mechanical properties of the silica-based ceramics was *** Al_(2)0_(3) in silica-based ceramics can improve the mechanical properties by playing a role as a seed for the crystallization of fused silica into *** a result,with the increase of Al_(2)0_(3) content,the linear shrinkage of the silica-based ceramics first decreased and then increased,while the room-temperature flexural strength and the high-temperature flexural strength first increased and then *** the Al_(2)0_(3) content increased to 1.0 vol%,the linear shrinkage was reduced to 1.64%because of the blocked viscous flow caused by Al_(2)0_(3).Meanwhile,the room-temperature flexural strength and the high-temperature flexural strength were improved to 20.38 and 21.43 MPa with 1.0 vol%Al_(2)0_(3),respectively,due to the increased a-cristobalite and P-cristobalite ***,using the optimal content of Al_(2)0_(3) in silica-based ceramics can provide excellent mechanical properties,which are suitable for the application of ceramic cores in the manufacturing of hollow blades.

关键词： silica ceramic core stereolithography AI2O3 mechanical properties hollow blades

TC4合金表面激光复合微弧氧化涂层制备及热腐蚀失效研究

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稀有金属 2024年第6期48卷 774-785页

作者：吴国龙王睿陈祥辉王晔文陈姚建华浙江工业大学激光先进制造研究院浙江杭州310023 浙江工业大学机械工程学院浙江杭州310023 高端激光制造装备协同创新中心浙江杭州310023 北京卫星制造厂有限公司北京100089 浙江工业大学材料科学与工程学院浙江杭州310014

为了提高钛合金的耐热腐蚀性能,采用激光复合微弧氧化(LMAO)的方法在TC4合金表面制备了陶瓷防护涂层,研究了NaAlO_(2)盐电解液体系下激光同步辐照对涂层结构和热腐蚀行为的影响。结果发现,相比于单一微弧氧化涂层,激光复合微弧氧化涂层... 详细信息

为了提高钛合金的耐热腐蚀性能,采用激光复合微弧氧化(LMAO)的方法在TC4合金表面制备了陶瓷防护涂层,研究了NaAlO_(2)盐电解液体系下激光同步辐照对涂层结构和热腐蚀行为的影响。结果发现,相比于单一微弧氧化涂层,激光复合微弧氧化涂层表面平整度有所提高,表面的孔隙率和孔径尺寸降低,涂层具有更高的Al含量,致密和均匀性得到了改善。涂层主要由Al_(2)TiO_(5),金红石型TiO_(2),锐钛矿型TiO_(2)和少量α-Al2O3高温稳定相构成,激光提供的能量有利于高温相的形成。TC4基体最大氧化增重达2.88 mg·cm^(-2),形成了33.3μm厚的氧化层,微弧氧化涂层最大氧化增重降低至1.13 mg·cm^(-2),氧化层厚为1.05μm。相比之下,激光复合微弧氧化涂层最大氧化增重进一步下降至0.91 mg·cm^(-2),形成的氧化层最薄,仅为0.33μm。激光复合微弧氧化涂层孔洞缺陷少,涂层中高的Al元素含量使腐蚀产物更加致密,减少裂纹和空洞形成,腐蚀区域得到有效控制,增强了涂层对O和腐蚀性介质的阻挡效果,对基体钛合金的保护作用提高。

关键词： TC4合金热腐蚀微弧氧化(MAO) 激光复合