scholarly journals Use of reverse engineering method for respirator devices in COVID-19 crisis

Author(s):  
Mohamed Zied Chaari ◽  
Rashid Al-Rahimi ◽  
Mohamed Abdelfatah ◽  
Abdulrahman Saleh Khamis
2021 ◽  
Vol 1098 (6) ◽  
pp. 062108
Author(s):  
A P Budijono ◽  
S S Syah ◽  
W D Kurniawan ◽  
B N Habib

2013 ◽  
Vol 655-657 ◽  
pp. 1237-1241
Author(s):  
Chuan Qi Wang ◽  
Jian Zhang ◽  
Wei Rong Wang ◽  
Xue Jing Gu

Currently, the ancient calligraphy and painting are widely used in decoration screen; however, the processing technic is normally based on manual manipulation. Normally, this kind of processing is not efficient, and with highly cost. In addition, it could not maintain the original artistic style in maximum. the paper proposes to process the sculpture of ancient calligraphy according to its photo, by adopting the CNC technology based on reverse engineering method, which enables to mostly keep the original artistic style, and to create the CNC code automatically with the assistant of image processing to achieve intelligent machining.


2011 ◽  
Author(s):  
G. S. Djordjevic ◽  
C. A. Sporea ◽  
D. N. Vulcanov ◽  
Madalin Bunoiu ◽  
Iosif Malaescu

2014 ◽  
Vol 556-562 ◽  
pp. 5526-5530
Author(s):  
Hai Yan Liu ◽  
Yue Zhao ◽  
Rui Huang

Discovering the vulnerabilities in network protocols is the key for network attacks and defenses. Basing on the analysis of some currently used vulnerability discovering methods, a method combining reverse engineering and fuzzy testing is put forward for vulnerability discovering of network protocols, where reverse engineering method is first used to analyze the details of the communication protocol, then fuzzy testing is used to test the target software. This combination can promote the efficiency of the fuzzy testing. By using this method to test a real network application, several vulnerabilities are discovered, which verifies the validity of this method.


2017 ◽  
Vol 2017 (11) ◽  
pp. 1877-1882 ◽  
Author(s):  
Josef Sedlak ◽  
Ales Polzer ◽  
Josef Chladil ◽  
Martin Slany ◽  
Ales Jaros

Author(s):  
Alexander Lange ◽  
Dean Johnson ◽  
Nicole Key

Abstract This paper presents two turbomachinery-specific methods for profile tolerance assessment of compressor airfoils that process 3D scan data. This optical inspection technology digitizes the entire surface of the part into a triangulated mesh, which is aligned to nominal geometry and then processed to extract densely arranged profile sections. For the reverse engineering method, the profile sections are decomposed into thickness and camber distributions. These distributions and the camber line are used to identify the profile parameter vector of the reverse engineering model. The deviation of the actual geometry is obtained by subtracting its parameters from those of the nominal geometry. Parameter-span graphs reveal airfoil shape deviation and allow for quantification of blisk scatter. The design-like parameters are meaningful and enable an intuitive engineering judgement of the actual geometry deviation. The profile tolerance assessment method utilizes the camber line from the reverse engineering method to elegantly check against variable profile tolerance limits. The actual section is best-fitted to its nominal counterpart and assessed regarding its deviation relative to the allowed local tolerance. This ratio is plotted in a developed view summarizing the result of the profile tolerance assessment for the whole airfoil in a single graph. Thus, the condensed results allow for effective utilization of the high-resolution in airfoil sections. Ultimately, the paper widens the view from one airfoil towards the assessment of the entire blisk. The blisk data is presented by statistical processing of deviation fields of all airfoils, in terms of mean and standard deviation. These statistical quantities are plotted onto the airfoil contour to e.g. represent the average airfoil thickness of the blisk. The standard deviation plot points to airfoil sections of larger geometric scatter and reveals areas of a non-robust manufacturing process.


2012 ◽  
Vol 226-228 ◽  
pp. 2207-2210
Author(s):  
Qi Wang ◽  
Qing Ming Wang

The purpose of this study is to investigate the effects of two kinds of total contact insoles (TCI). Traditional TCI reflects the shape of foot, while deformed total contact insole(DTCI) was established basing on the shape of footprints on clay prototypes. A female experimenter was asked to exert different loadings on clay prototypes to make footprints. Shapes of the footprints have been recorded by a reverse engineering method. Force distribution results in given preconditions were reflected and recorded for quantified comparison. shapes of two total contact insoles were rebuilt under different loadings. Having deformation of different magnitude over each area as a reference, effect and possibility of further improvement have been explored. Our findings showed that insoles based on larger deformation can be utilized to redistribute peak pressure effectively under normal loading. The results indicates that DTCI in this study can be used as a more important tool in adjusting functions or comfort ratings of shoes.


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