A Statistical Approach to Nondestructive Testing of Laser Welds

1983 ◽  
Vol 105 (3) ◽  
pp. 224-229 ◽  
Author(s):  
Hibbert A. Duncan
Keyword(s):  
Statistical Analysis ◽  
Laser Welding ◽  
High Intensity ◽  
Statistical Approach ◽  
Welded Joint ◽  
Bayes Rule ◽  
Nondestructive Technique ◽  
Pearson Criterion ◽  
Laser Welds

A statistical analysis of the data obtained from a relatively new nondestructive technique for laser welding is presented. The technique is one in which information relating to the quality of the welded joint is extracted from the high intensity plume which is generated from the materials that are welded. The system is such that the detected plume is processed to give a numerical value associated with the material vaporization and consequently, the weld quality. Optimum thresholds for the region in which a weld can be considered as acceptable are determined based on the Neyman-Pearson criterion and Bayes rule.

scholarly journals Fuzzy C-Means Partition Cluster Analysis and Validation Studies on a Subset of CiteScore Dataset

2019 ◽  
Vol 8 (9S3) ◽  
pp. 105-107
Keyword(s):  
Cluster Analysis ◽  
Laser Welding ◽  
Validation Studies ◽  
Welded Joint ◽  
Experimental Studies ◽  
Pulsed Laser ◽  
Welding Process ◽  
Pulsed Laser Welding ◽  
Fuzzy C Means

The article deals with promising areas of application of pulsed laser welding for products made of silver-based alloys. The results of experimental studies to improve the quality of the welded joint and the efficiency of the welding process with the use of activated absorption additives are presented

Features of Laser Welding Light Constructions from Cryogenic Austenitic Steel 316L

2019 ◽  
Vol 822 ◽  
pp. 512-519 ◽  
Author(s):  
M. Kuznetsov ◽  
Maksim Larin ◽  
Alexander Sorokin
Keyword(s):  
Laser Welding ◽  
Austenitic Steel ◽  
Welded Joint ◽  
Light Metal ◽  
Metal Structures ◽  
The Real ◽  
316L Steel ◽  
Real Objects

The publication describes the results of the research of the influence of laser welding mode parameters on geometry and quality of the formation of the welded joint of 316L steel with thickness of 1 mm. According to the results of research in the framework of pre-project works, in order to test the technology at the real objects, components of light metal structures were welded.

scholarly journals Seasonal Statistical Analysis on the Quality of Underwater Supplies in South-Eastern Romania

2019 ◽  
Vol 70 (3) ◽  
pp. 820-827 ◽  
Author(s):  
Gabriel Murariu ◽  
Mihaela Timofti ◽  
Ionelia Savinuta ◽  
Adrian Murariu ◽  
Catalina Iticescu ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Natural Resource ◽  
Statistical Approach ◽  
Monitoring Program ◽  
Preliminary Results ◽  
South Eastern ◽  
Water Well ◽  
Sampling Points ◽  
The Status

In this paper are presented preliminary results of seasonal statistical approach on monitoring of a series of drilled water well corresponding on a surface of about a quarter of Galati County which has a total area of 4,466 square km. In order to offer an adequate picture of the status of this natural resource we started a monthly monitoring program that cover approximatively 20 monitoring points for two years. The study is an extension of previous research, with a total of 21 sampling points.

The Effects of Exercise Commitment Facilitated by Service Quality of Smartphone Exercise Applications on Continued Exercise Intention

2019 ◽  
Vol 118 (1) ◽  
pp. 14-19
Author(s):  
Boo-Gil Seok ◽  
Hyun-Suk Park
Keyword(s):  
College Students ◽  
Factor Analysis ◽  
Regression Analysis ◽  
Statistical Analysis ◽  
Correlation Analysis ◽  
Service Quality ◽  
Frequency Analysis ◽  
Primary Data ◽  
Exercise Intention

Background/Objectives: The purpose of this study is to examine the effects of exercise commitment facilitated by service quality of smartphone exercise Apps on continued exercise intention and provide primary data for developing and/or improving smartphone exercise Apps. Methods/Statistical analysis: A questionnaire survey was conducted amongst college students who have experiences in using exercise App(s) and regularly exercise. The questionnaire is composed of four parts asking about service quality, exercise commitment, continued exercise intention, which were measured with a 5-point Likert Scale, and demographics. Frequency analysis, factor analysis, correlation analysis, and regression analysis were carried out to analyze the obtained data with PASW 18.0.

Peculiarities of AD33 aluminum alloy hand laser welding

2020 ◽  
Vol 2020 (12) ◽  
pp. 13-17
Author(s):  
Nikolay Proskuryakov ◽  
Uliana Putilova ◽  
Rasul Mamadaliev ◽  
Oleg Teploukhov
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Laser Welding ◽  
Welded Joint ◽  
Comparative Investigation ◽  
Micro Structure ◽  
Joint Quality ◽  
Beam Motion

The comparative investigation results of AD33 aluminum alloy welded joint quality dependence upon changes in a laser beam motion rate for conditions of hand and automatic laser welding are shown. A micro-structure of a welded joint at the hand and automatic laser welding of the AD33 alloy is investigated.

Relationships between Population Dynamics and Operating Parameters in an Activated Sludge-Plant by Statistical Analysis

1992 ◽  
Vol 25 (4-5) ◽  
pp. 399-400 ◽  
Author(s):  
L. Cingolani ◽  
M. Cossignani ◽  
R. Miliani
Keyword(s):  
Population Dynamics ◽  
Statistical Analysis ◽  
Activated Sludge ◽  
Treatment Plant ◽  
Operating Conditions ◽  
Statistical Analyses ◽  
Operating Parameters ◽  
Aerobic Treatment

Statistical analyses were applied to data from a series of 38 samples collected in an aerobic treatment plant from November 1989 to December 1990. Relationships between microfauna structure and plant operating conditions were found. Amount and quality of microfauna groups and species found in activated sludge proved useful to suggest the possible causes of disfunctions.

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