New Approach to Bearing Steel Quality Evaluation

Metallurgist ◽  
2021 ◽  
Author(s):  
M. I. Kravtsova ◽  
T. I. Sidorenko ◽  
V. I. Voznaya
Keyword(s):  
Quality Evaluation ◽  
Bearing Steel ◽  
New Approach ◽  
Steel Quality

Quality Evaluation for Evolving Conceptual Database Design

2018 ◽  
pp. 2020-2030
Author(s):  
Elvira Immacolata Locuratolo
Keyword(s):  
Quality Evaluation ◽  
Database Design ◽  
Logical Object ◽  
New Approach ◽  
Computational Costs ◽  
Logical Models ◽  
Object Database ◽  
Conceptual Graph

The article is concerned with the proposal of a new approach of conceptual database design, called evolving conceptual database design, which exploits the structure for the preservation of database classes/concepts within the design. In order to discuss the opportunity to take into consideration this approach, the structure is constructed starting from a database conceptual graph. The leaves of the structure are mapped to a logical/object database graph. Horizontal steps of constructive logical database design extend the model. The computational costs required to design the structure for the preservation of database classes/concepts, as well as the qualitative/conceptual costs of the logical models resulting from the constructive design, are discussed.

Characterization and Combination of Agronomical Entities in Accordance with Spatial and Quantitative Imprecision

2015 ◽  
Vol 6 (3) ◽  
pp. 1-16
Author(s):  
Karima Zayrit ◽  
Eric Desjardin ◽  
Cyril de Runz ◽  
Herman Akdag
Keyword(s):  
Quality Evaluation ◽  
Agricultural Practices ◽  
Quantitative Information ◽  
New Approach

One of the objectives of the authors' studies on the monitoring of agricultural practices is to deal with imperfect spatial and quantitative information, and to always associate a quality evaluation with acquired or computed data from each location in the territory being studied. In order to produce quantitative information for each location and to consider the imprecision of data, this paper introduces the notion of fuzzy agronomical entities that consider both fuzzy spatial and quantitative information. Then, it proposes a new approach for propagating spatial imprecision to fuzzy quantitative values using two fuzzy combination operators. This method produces the fuzzy quantity of spatially disseminated chemicals for each location.

scholarly journals Co-occurrence between macrophytes and macroinvertebrates: towards a new approach for the running waters quality evaluation?

2014 ◽  
Vol 73 (AoP) ◽  
Author(s):  
Lorenzo Traversetti ◽  
Simona Ceschin ◽  
Alessandro Manfrin ◽  
Massimiliano Scalici
Keyword(s):  
Quality Evaluation ◽  
Running Waters ◽  
New Approach

Evaluating image quality using consistent grey relational grade

2014 ◽  
Vol 31 (2) ◽  
pp. 231-249 ◽  
Author(s):  
Yen-Ching Chang ◽  
Chun-Ming Chang ◽  
Liang-Hwa Chen ◽  
Tung-Jung Chan
Keyword(s):  
Image Quality ◽  
Contrast Enhancement ◽  
Quality Evaluation ◽  
New Approach ◽  
Content Type ◽  
Multi Criteria Evaluation ◽  
Grey Relational Grade ◽  
Enhancement Method ◽  
Efficient Scheme ◽  
Grey Relational

Purpose – Assessing image quality is a difficult task. Different demands need distinct criteria, so it is not realistic to decide which contrast enhancement method is better only through one criterion. The main purpose is to propose an efficient scheme to effectively evaluate image quality. Furthermore, the idea can be applied in other fields. Design/methodology/approach – To objectively and quantitatively assess image quality, the authors integrate four criteria into one composite criterion and use it to evaluate seven existing contrast enhancement methods. The mechanism of integration is through a newly proposed way of computing a grey relational grade (GRGd), called the consistent grey relational grade (CGRGd). Findings – In this paper, the authors propose the CGRGd, which is more efficient and consistent than other existing GRGds. When applied to image quality evaluation, the proposed CGRGd can effectively choose the best method than others. The results also indicate that the proposed CGRGd combined with appropriate criteria can be widely used in the field of multiple criteria. Originality/value – The proposed CGRGd is a new approach to the problem of multi-criteria evaluation, and its application to the evaluation of image quality is a novel idea. For readers interested in the field of multi-criteria decision-making, the CGRGd provides an efficient and effective alternative.

scholarly journals New approach to equipment quality evaluation method with distinct functions

2016 ◽  
Vol 20 (2) ◽  
pp. 743-752 ◽  
Author(s):  
Vladimir Milisavljevic ◽  
Dragan Medenica ◽  
Vojin Cokorilo ◽  
Ivica Ristovic
Keyword(s):  
Quality Evaluation ◽  
Evaluation Method ◽  
New Approach

scholarly journals A New Approach to Calculate the Velocity of Interdendritic Fluid Flow during Solidification Using Etched Surface Height of Actual Metal Ingot

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 927
Author(s):  
Zibing Hou ◽  
Zhiqiang Peng ◽  
Qian Liu ◽  
Zhongao Guo ◽  
Hongbiao Dong
Keyword(s):  
Fluid Flow ◽  
Fluid Velocity ◽  
Three Dimensional ◽  
Bearing Steel ◽  
New Approach ◽  
Velocity Magnitude ◽  
Interdendritic Fluid Flow ◽  
Gcr15 Bearing Steel ◽  
Etched Surface ◽  
Calculated Velocity

Macrosegregation remains one of main defects affecting metal materials properties, which is mainly caused by interdendritic fluid flow during solidifying. However, as for controlling actual specific segregation, it is still difficult to effectively measure or simulate this kind flow instead of pure fluid flow, especially in complex casting processes of high-grade materials. Herein, a new method for obtaining velocity magnitude and direction of interdendritic fluid flow during metal solidifying is proposed from boundary layer and standard deviation obtained by measuring etched surface heights of the actual ingot and using statistical principles. Taking continuous casting bloom of GCr15 bearing steel as an example, it is indicated that the calculated velocity magnitudes under different sides and superheats can be explained by process features and, hence, solidification mechanism. The velocity magnitude and fluctuation are higher on the inner curve side and under low superheat. Meanwhile, it is found that the fluctuation extent of secondary arm spacing is more relevant with interdendritic fluid flow, although its magnitude is mainly determined by the cooling rate. Moreover, on the basis of the calculated velocity directions and magnitudes, there is a positive correlation between segregation area ratio and the effective ratio between interdendritic flow velocity and growth velocity especially in the equiaxed grain zone, which corresponds with classic macrosegregation formation theory. The above findings and comparison with other results demonstrate the validity of the new approach, which can obtain the magnitude and the direction of interdendritic fluid velocity for two or three-dimensional multiscale velocity distribution by tailoring measuring length and numbers.

Digitalisierte Tragbilder im Werkzeug-Tryout */Digital spotting images as a quantitative criteria for quality evaluation during tryout

2019 ◽  
Vol 109 (10) ◽  
pp. 722-726
Author(s):  
M. Liewald ◽  
P. Essig ◽  
C. Bolay
Keyword(s):  
Automotive Industry ◽  
Quality Evaluation ◽  
Optical Measurement ◽  
Measurement Technology ◽  
Manufacturing Companies ◽  
New Approach ◽  
Forming Simulation ◽  
Data Feedback ◽  
Grinding Operations

Steigende Anforderungen an die Qualität von Außenhautteilen stellen Unternehmen in der Automobilindustrie vor neue Herausforderungen. Eine wichtige Rolle spielt dabei der Werkzeugentstehungsprozess, der von zeitintensiven Schleifarbeiten geprägt ist. Der Beitrag zeigt einen neuartigen Ansatz zur Datenrückführung von Traganteilen bestimmter Wirkflächenzonen in die Umformsimulation durch optische Messtechnik. Damit kann der aktuelle Tryout-Zustand mit der Simulation verglichen werden.   Increasing demands on the quality of outer car panels pose new challenges for manufacturing companies in the automotive industry. The tryout process of dies needs special consideration as it is characterized by time-consuming manual grinding operations. This paper focusses on a new approach for data feedback of contact areas into forming simulation by optical measurement technology. This allows for comparing the current tryout state with the forming simulation.

scholarly journals A new approach on the quality evaluation of tourist services

2018 ◽  
Vol 31 (1) ◽  
pp. 1418-1436 ◽  
Author(s):  
Gina Ionela Butnaru ◽  
Amanda Miller ◽  
Valentin Nita ◽  
Mirela Stefanica
Keyword(s):  
Quality Evaluation ◽  
New Approach
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