Methods of quality control multi-stage stochastic technological process

2015 ◽  
Vol 3 (5) ◽  
pp. 185-187
Author(s):  
Yu. Safonova ◽  
O. Avseeva
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Multi Stage

scholarly journals CERTIFICATION OF VEGETABLE OILS AND QUALITY CONTROL IN THE TECHNOLOGICAL PROCESS OF PRODUCTION

2019 ◽  
Vol 2019 (4) ◽  
pp. 119-126
Author(s):  
CH Bekmurotov ◽  
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Vegetable Oils ◽  
Raw Materials ◽  
Cottonseed Oil ◽  
Product Classification ◽  
Cotton Seeds ◽  
The Cost

The article reviewed the certification and quality control of the technological process for the production of vegetable oil. There is a procedure for packaging, quality control of products, determination of quality indicators and quality control of finished products. The procedure for using refined cottonseed oil and its varieties, the requirements for placement and storage of vegetable oils, as specified in the regulatory documents, the quality control of vegetable oils and other solutions for cottonseed oil are provided. The gas analyzer shows a solution for measuring the amount of solution by painting the tubes of a mixture of gas and air in oil. Detailed information on the production of vegetable oils, the cost of raw materials, the level of fat content of cotton seeds and the methods used to produce oil from cotton seeds. Methods for certification of vegetable oils, types of quality control, methods of testing and quality determination are presented. It was shown that the procedure for refined production of cottonseed oils and their types, as well as the state of the product classification of products based on the method of producing vegetable oils for consumer purposes, analysis of the sequence of refined oils and refining processes.

scholarly journals Quality control of aluminium melt in production process

2016 ◽  
Vol 61 (Special Issue) ◽  
pp. S43-S47 ◽  
Author(s):  
M. Kotus ◽  
E. Jankajová ◽  
M. Petrík
Keyword(s):  
Quality Control ◽  
Chemical Composition ◽  
Production Process ◽  
Aluminium Alloy ◽  
Technological Process ◽  
Casting Alloy

The quality of aluminium alloy in the production process on the chemical composition basis was evaluated. The quality of casting alloy depends on the chemical composition of melt and on the technological process of production process. The basic elements such as Si, Cu, Fe, Mg and Al in melting were evaluated. The obtained data were compared with the guide data referred to in the standard for aluminium alloy.

scholarly journals Analysis of the criteria of efficiency of work of separators for the field of hydrocarbon raw

2019 ◽  
pp. 114-119
Author(s):  
Valeriy V. Piven ◽  
Vladislav S. Shchelkonogov
Keyword(s):  
Technological Process ◽  
Raw Materials ◽  
Comprehensive Assessment ◽  
Technological Scheme ◽  
Qualitative Composition ◽  
Separation Processes ◽  
Process Flow ◽  
Multi Stage ◽  
Flow Diagrams

Assessment of the quality of separation of hydrocarbon raw during its field preparation is necessary to determine the efficiency of the entire technological process of preparation. The absence of complex criteria for assessing the quality of separation for multi-stage processes does not allow one to obtain unambiguous solutions in justifying the process flow diagrams and equipment for separation. We have analyzed the typical technological scheme of separation of hydrocarbon raw materials and existing criteria for separation processes. It is proposed to use the criterion for a comprehensive assessment of the separation processes of hydrocarbon raw materials, allowing calculating the efficiency of the process, taking into account the possible production of intermediate fractions and their qualitative composition

scholarly journals The phenomenon of zinc deficiency among children in China aged 3–5 years old

2020 ◽  
Vol 79 (OCE2) ◽  
Author(s):  
Ye Bi ◽  
Zhenyu Yang ◽  
Xuehong Pang ◽  
Yifan Duan ◽  
Jianqiang Lai ◽  
...  
Keyword(s):  
Quality Control ◽  
Zinc Deficiency ◽  
Rural Areas ◽  
Serum Zinc ◽  
Zinc Level ◽  
Urban Children ◽  
Rural Children ◽  
Country Level ◽  
Multi Stage ◽  
Control Samples

AbstractIntroductionzinc is an essential micro-nutrient for growth and proper immune function. Yet there are limited data available on the prevalence of zinc deficiency among children aged 3–5 at the country level. This information will enable health planners to determine the need for zinc intervention activities and to stimulate further research into these areas.materials and methodsThe data on children aged 3–5 were extracted from the Chinese National Nutrition and Health Surveillance in 2013. By multi-stage stratified cluster randomly sampling method, 30 children aged 3–5 years old were selected from each region for this study from 55 counties in China to analyze serum zinc. Finally, 1472 children aged 3–5 years were included in the study. The concentration of serum zinc was determined by high resolution inductively coupled plasm mass spectrometry. High and low level quality control samples were used, measured value was (1.63 ± 0.04)mg/l and (2.80 ± 0.06)mg/l, respectively. CV of quality control samples were 1.69%~2.45%. The zinc deficiency was defined as serum zinc level < 70μg/dl with the standard of WHO.Resultsserum zinc means of children aged 3–5 years was (95.3 ± 18.2)μg/dl and 3.9% children with zinc deficiency. serum zinc means level in urban children was (98.9 ± 17.6)μg/dl, and (91.6 ± 18.2)μg/dl in rural area. we showed that the serum zinc deficiency rate was higher in rural children (5.5%) than urban children (2.4%), and there were significant differences between these two areas. serum zinc means level in boys aged 3–5 years was (95.3 ± 18.7)μg/dl, and (95.3 ± 17.8)μg/dl in girls aged 3–5 years old. The prevalence of zinc deficiency was 1.5%, 6.6% and 1.8% in 3~,4~,5~ years old urban boys, respectively; 6.8%, 7.7% and 4.0% in rural boys, respectively. The prevalence of zinc deficiency was 2.3%, 0.8% and 1.7% in 3~,4~,5~ years old urban girls, respectively; 4.1%, 7.0% and 4.0% in rural girls, respectively. And there were differences between urban and rural areas in girls of 4~.5 years.DiscussionThe zinc level of children aged 3–5 years in China has been improved compared with ten years ago, but the zinc deficiency of rural children is still lower than that of urban children, especially those aged 4 to 5 years in rural areas, so we should pay more attention to this group.

Key Construction Technology of Porous Concrete Permeable Base

2014 ◽  
Vol 587-589 ◽  
pp. 1162-1166
Author(s):  
Ai Ming Bai
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Base Material ◽  
Construction Technology ◽  
Technological Parameters ◽  
Composition Design ◽  
Porous Concrete ◽  
Construction Machinery

Porous concrete also be called macropterous concrete or porous lean concrete.As a new base material,it is a lean concrete between cement stabilized macadam and ordinary concrete.Based on Luoyang beltway project,this paper describes the composition design of porous concrete,and discusses the combination of construction machinery,technological process,QCS(quality control specification) and test detection of porous concrete permeable base.Also we do research on many technological parameters such as mixing,paving,molding,maintenance in the construction of porous concrete permeable base.This provides a reference on construction technology and its application.

Current Statistical Quality Control of Technological Process

2014 ◽  
Vol 11 (3) ◽  
pp. 1757-1759
Author(s):  
Victor Aleksandrovich Vlasov ◽  
Svetlana Victorovna Vlasova ◽  
Tolokonsky Andrey Olegovich
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Statistical Quality Control ◽  
Statistical Quality

scholarly journals Probabilistic Modeling for Manufacturing of Automotive Electric Equipment

2021 ◽  
Author(s):  
Vladimir Kozlovsky ◽  
Yury Klochkov
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Quality Criterion ◽  
Probabilistic Modeling ◽  
Electrical Equipment ◽  
Manufacturing Processes ◽  
Effective Management ◽  
Design And Manufacturing ◽  
Electric Equipment ◽  
The Relationship

Abstract A generalized quality criterion is proposed for the processes of designing and manufacturing electrical equipment. The relationship between the parameters of the technological process of manufacturing electrical equipment and the ones of statistical plans acceptance quality control is taking into account for the calculation of the criterion. This creates the prerequisites for effective management of design and manufacturing processes to achieve the desired level of quality.

scholarly journals Estimation of Consistency of Production of the Pertussis Component of DTP Vaccine in Terms of Immunogenic Activity and Specific Safety Using Shewhart Charts

2018 ◽  
Vol 18 (4) ◽  
pp. 243-248
Author(s):  
I. A. Alekseeva ◽  
O. V. Perelygina ◽  
E. D. Kolyshkina
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Control Charts ◽  
Whooping Cough ◽  
Primary Vaccination ◽  
Statistical Control ◽  
Shewhart Control ◽  
Dtp Vaccine ◽  
Time Basis ◽  
Shewhart Charts

WHO experts attribute the resurgence of whooping cough to the wide use of acellular pertussis vaccines (aPs) as components of combination products. In this regard, WHO encourages countries that have not yet switched to the use of aPs to continue to use whole-cell pertussis vaccines (wPs) for primary vaccination. The experience of using pertussis vaccines has shown that companies do not always produce highly efficacious products. The use of statistical methods of samples quality control helps to ensure consistency of the technological process, which results in the production of more homogeneous products, and rules out the possibility of producing low-quality products. This paper presents the results of retrospective evaluation of the consistency of the wP (as a pertussis component of the DTP vaccine) production using Shewhart control charts. It was shown that at some points in time during the analyzed period from January 2017 until March 2018 the technological process of the company lacked proper statistical control. This increased the risk of producing non-uniform and defective products. In order to improve the quality and consistency of pertussis component batches, the company’s quality control and quality assurance services should make extensive use of Shewhart charts on a real-time basis.

Aspects about the Quality Control at First Article Inspection (FAI) for Parts Obtained by Materials Composites Used in the Railway Sector

2018 ◽  
Vol 27 ◽  
pp. 262-267
Author(s):  
Cristina Ileana Pascu ◽  
Stefan Gheorghe ◽  
Dragos Popa ◽  
Ovidiu Popa
Keyword(s):  
Quality Control ◽  
Composite Materials ◽  
Technological Process ◽  
Control Implementation

In the railway sector, on the prototyping phase of product made by composite materials, it is necessary the implementation of a strict quality control using the instrument First Article Inpection (FAI). In this paper some of the most important steps in quality control implementation of FAI for composite parts at the prototyping parts made of composite materials in the railway field are presented. Thus, the necessary steps for developing FAI and the process diagram are given. Also, the method FMEA process is presented in order to eliminate the risks of errors and defects during the development of the technological process for obtaining the composite piece.

scholarly journals Quality control of building materials

2020 ◽  
Vol 164 ◽  
pp. 08017
Author(s):  
Valentina Loganina
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Building Materials ◽  
The State ◽  
Ceramic Brick ◽  
Normative Documents ◽  
Control Information ◽  
Construction Products

The purpose of the work is to assess the influence of the state of the technological process of production on the error of deciding on the suitability of the batch under control. Information is provided about the values of the error of representativeness at assessing the quality of building materials using ceramic brick as an example. It is shown that the rules for acceptance of the relevant normative documents for construction products should indicate the required number of samples for testing, taking into account the probability of an error-free forecast.

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