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Motion Primitive Recognition on Human Guided Robotic Arm using Machine Learning
Shih-Kang Chen,Chin-Sheng Chen 제어로봇시스템학회 2019 제어로봇시스템학회 국제학술대회 논문집 Vol.2019 No.10
This paper proposed a novel intuitive teaching technologies by reconstructing the recorded motion information during human guided robotic arm. A learning algorithm is proposed in this paper to recognize the motion primitives according to therbligs definition. The hybrid sensing interface is used to record and modified the positional trajectory, force/torque, and gripper information. Furthermore, an extended Kalman filter is used to pre-process the data and estimate the velocity and acceleration profile as motion features. The motion features, output data via the hybrid sensing interface, is finally used to recognize the target therblig by proposed cascade support vector machine. The experimental results show that the proposed method can recognize the motion features into therbligs correctly and efficiently. The recognition results can be further used to reconstruct an assembly operation.
Effects of substrate treatment on the electroluminescence performance of flexible OLEDs
Chin H.Chen,Shih Feng Hsu,Shiao Wen Hwang,Shih-Nan Lee 한국물리학회 2004 Current Applied Physics Vol.4 No.6
Electroluminescence (EL) performance of exible organic light-emitting device (FOLED) has been found to be highly dependentupon the morphology of the surface of the indium thin oxide (ITO)/plastic substrate as well as the patterning and processingconditions of the substrate. We will present evidence showing that luminance eciency of FOLED can be greatly improved bypretreatment. Surface analysis of the ITO/PET by means of atomic force microscope (AFM) and optical microscope will becompared with that of the ITO/glass and the inuence of exible OLEDs substrate treatment by various methods on EL perfor-mance will also be discussed.
Fabrication of blue top-emitting organic light-emitting devices with highly saturated color
Chin H.Chen,Chung-Chun Lee,Andrew T.Hu,Shih Feng Hsu 한국물리학회 2004 Current Applied Physics Vol.4 No.6
Blue top-emitting organic light-emitting devices (TOLEDs) with highly saturated color were developed by microcavity eect. Thedevice structure studied was glass/reective silver/indium-tin oxide (ITO)/organic electroluminescent stack/semi-transparent cathode(calcium/silver). By changing the thicknesses of ITO and organic layers in the microcavity structure device doped withp-bis(p-N,N-di-phenyl-aminostyryl)benzene (DSA-ph), highly saturated color with Commission Internationale de L’Eclairage chromaticitycoordinates (CIEx;y) of (0.14, 0.08) was obtained.
FEM ANALYSIS AND EXPERIMENT VALIDATION ON MULTI-PASS FORGING OF TORX ROUND FLANGE BOLT
Shih-Hsien Lin,Dyi-Cheng Chen,Un-Chin Chai,Gow-Yi Tzou 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.5
This study aims at exploring the multi-pass forging of Torx Round Flange Bolt (automotive fastener) to simulate each pass forging process using FEM simulation. The software is used to carry out the simulation analysis. Constant shear friction is always assumed at the interface between die and workpiece to explore the effective stress, the effective strain, the velocity filed, and the forging force for each pass. Through the pass schedule plan and design based on FEM analysis, the four-pass forging process is designed to form the Torx Round Flange Bolt compared the five-pass forging. It is noted that the total forging force is 1204kN, so the 200 tons machinery in the factory can be chosen to manufacture this automotive fastener. The die stress analysis for each pass has been explored to realize whether the dies are damaged or not. The forming feasibility of Torx Round Flange Bolt can be performed by FEM simulation. All dies designs and forming results can be proposed to the dies manufacture so as to perform the realistic experiments. Comparisons between FEM and experiment for final product dimensions can be carried out. The maximum dimension error is just around 3.32% to show a good agreement with the experiment. The research results can provide to the industries as the references of establishment of multi-pass forging technology.
Shih-Hung Tsai,Yen-Yue Lin,Chin-Wang Hsu,Yu-Long Chen,Min-Tser Liao,Shi-Jye Chu 연세대학교의과대학 2009 Yonsei medical journal Vol.50 No.2
Purpose: Aortic dissection (AoD) is one of the most common catastrophes involving the aorta. Nevertheless, early diagnosis remains to be a challenge in the Emergency Department (ED), particularly in young individuals. In this study, we attempted to identify the characteristics of acute AoD among young individuals, particular in patients with Marfan syndrome. Materials and Methods: This was an retrospective chart-review study conducted in a tertiary referring hospital. The hospital database was queried for the combination of AoD and patients under age of 40 years. The medical charts were reviewed to obtain demographic data, clinical data and laboratory characteristics by using a standardized data collection sheet. A comparison between Marfan syndrome and non-Marfan syndrome patients was performed. Results: During the 10- years period, 18 of 344 patients with acute AoD were younger than 40 years-old. Patients with Marfan syndrome developed acute AoD at a younger age than patients without Marfan syndrome. The mean diastolic blood pressure was significantly lower in patients with Marfan syndrome upon presenting to the ED than those without. Patients with Marfan syndrome had trends toward higher risk of development of type A AoD, increased recurrence rate and higher mortality rate than those without. However, statistical significance was not present. Conclusion: ED physicians should have high alert to acute AoD in young patients presenting with severe unexplained chest and back pain, particularly in those patients with a history of heart diseases, hypertension, and Marfan syndrome or featuring Marfanoid habitus. Acute coronary syndrome, unexplained abdominal symptoms, and sudden cardiac arrest could be the initial manifestation of AoD in young patients. A low threshold to perform enhanced computed tomography may facilitate early diagnosis and timely treatment in this patient population. Purpose: Aortic dissection (AoD) is one of the most common catastrophes involving the aorta. Nevertheless, early diagnosis remains to be a challenge in the Emergency Department (ED), particularly in young individuals. In this study, we attempted to identify the characteristics of acute AoD among young individuals, particular in patients with Marfan syndrome. Materials and Methods: This was an retrospective chart-review study conducted in a tertiary referring hospital. The hospital database was queried for the combination of AoD and patients under age of 40 years. The medical charts were reviewed to obtain demographic data, clinical data and laboratory characteristics by using a standardized data collection sheet. A comparison between Marfan syndrome and non-Marfan syndrome patients was performed. Results: During the 10- years period, 18 of 344 patients with acute AoD were younger than 40 years-old. Patients with Marfan syndrome developed acute AoD at a younger age than patients without Marfan syndrome. The mean diastolic blood pressure was significantly lower in patients with Marfan syndrome upon presenting to the ED than those without. Patients with Marfan syndrome had trends toward higher risk of development of type A AoD, increased recurrence rate and higher mortality rate than those without. However, statistical significance was not present. Conclusion: ED physicians should have high alert to acute AoD in young patients presenting with severe unexplained chest and back pain, particularly in those patients with a history of heart diseases, hypertension, and Marfan syndrome or featuring Marfanoid habitus. Acute coronary syndrome, unexplained abdominal symptoms, and sudden cardiac arrest could be the initial manifestation of AoD in young patients. A low threshold to perform enhanced computed tomography may facilitate early diagnosis and timely treatment in this patient population.