The Evaluation Model Efficiency of Ladle Graphitizing Inoculation of Cast Iron

2021 ◽  
Vol 316 ◽  
pp. 413-417
Author(s):  
D.A. Boldyrev ◽  
O.R. Latypov ◽  
R.N. Amirov
Keyword(s):  
Cast Iron ◽  
Boundary Conditions ◽  
Evaluation Model ◽  
Integral Model ◽  
Model Efficiency ◽  
Practical Conclusion

The model for evaluation of quality of ladle graphitizing inoculation of cast iron, according to the most common technological schemes, using the triple integral, is proposed and implemented. The necessary boundary conditions and parameters of the integral model are presented, described and justified. A concrete example confirms the practical conclusion that graphitizing inoculation of cast iron, melt into a stream in the process of filling a mold, is preferable.

scholarly journals Fuzzy Evaluation Model of Process Improvement Capability with Costs Consideration

2021 ◽  
Vol 11 (10) ◽  
pp. 4344
Author(s):  
Kuen-Suan Chen ◽  
Shui-Chuan Chen ◽  
Ting-Hsin Hsu ◽  
Min-Yi Lin ◽  
Chih-Feng Wu
Keyword(s):  
Process Improvement ◽  
Quality Evaluation ◽  
Evaluation Model ◽  
Fuzzy Evaluation ◽  
Sampling Errors ◽  
Capability Index ◽  
Testing Method ◽  
Improvement Potential ◽  
Testing Accuracy

The Taguchi capability index, which reflects the expected loss and the yield of a process, is a useful index for evaluating the quality of a process. Several scholars have proposed a process improvement capability index based on the expected value of the Taguchi loss function as well as the corresponding cost of process improvement. There have been a number of studies using the Taguchi capability index to develop suppliers’ process quality evaluation models, whereas models for evaluating suppliers’ process improvement potential have been relatively lacking. Thus, this study applies the process improvement capability index to develop an evaluation model of the supplier’s process improvement capability, which can be provided to the industry for application. Besides, owing to the current need to respond quickly, coupled with cost considerations and the limits of technical capabilities, the sample size for sampling testing is usually not large. Consequently, the evaluation model of the process improvement capability developed in this study adopts a fuzzy testing method based on the confidence interval. This method reduces the risk of misjudgment due to sampling errors and improves the testing accuracy because it can incorporate experts and their accumulated experiences.

Study on the Behavior of the Cast-Iron Bonded Grinding Wheel to Machining Properties of Hard and Brittle Materials

2007 ◽  
Vol 24-25 ◽  
pp. 229-232
Author(s):  
S.L. Ma ◽  
Wei Li ◽  
Cong Rong Zhu ◽  
J. Zhang ◽  
H.C. Ye
Keyword(s):  
Grain Size ◽  
Cast Iron ◽  
Tungsten Carbide ◽  
Surface Quality ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Different Grain Size ◽  
Grinding Efficiency ◽  
Machining Properties

Tungsten carbide which is a hard and brittle material was ground by cast-iron bonded diamond wheel with ELID (Electrolytic In-Process Dressing) technique, for the purpose of getting high efficiency, super-precision machining. Three kinds of cast-iron bonded diamond wheels with different grain size were adopted to get different grinding efficiency and surface quality of workpieces. The grinding properties of cast-iron bonded grinding wheels with different grain size and the ground surface quality of tungsten carbide are discussed in this paper. The experiment results indicate that, under the same feeding amount, the grinding efficiency of the wheel with bigger grain size is higher, and it could make the dimension accuracy of the workpiece controllable, but the wheel with smaller grain size could get better ground surface quality. The two grinding phases are decided by the ratio between the size of abrasive grain and the thickness of the oxide layer on the grinding wheel.

Integrated Quality Index of Organizational and Technological Solutions for Implementation of Burundian Capital Master Plan

2018 ◽  
Vol 931 ◽  
pp. 1295-1300
Author(s):  
Azariy A. Lapidus ◽  
Ndayiragije Yves
Keyword(s):  
Life Cycle ◽  
Quality Index ◽  
Construction Project ◽  
Phase Changes ◽  
Integral Model ◽  
Master Plan ◽  
Design Phase ◽  
Planning And Design

Construction project involves a complex array of specific interdependent activities, undertaken by multiple participants with contradictions of interests. It has phases to follow in its life cycle to meet the project’s objectives. Each phase will typically have multiple sub-phases and processes. The choice of technological and organizational solutions is carried out in the planning and design phase. Changes affecting any task (or the need to resolve conflicting elements of two or more tasks) can have a significant knock-on effect on the project’s success, regardless of the phase of the life cycle. This paper intends to develop an integral model of organizational and technological solutions, which allows to choose the optimal criteria for Burundian capital master plan as well as monitoring the quality of their implementation.

scholarly journals Evaluasi Reaksi Terhadap Pelaksanaan Diklat Penguatan Kepala Sekolah di BPSDM Provinsi DKI Jakarta

2020 ◽  
Vol 4 (2) ◽  
pp. 133-142
Author(s):  
Neny Rahmawati
Keyword(s):  
Random Sampling ◽  
Total Population ◽  
Evaluation Model ◽  
Faculty Evaluation ◽  
School Principal ◽  
Survey Method ◽  
Strategic Role ◽  
Level 1

EVALUATION OF THE REACTION TO THE IMPLEMENTATION OF STRENGTHENING SCHOOL PRINCIPAL IN BPSDM DKI JAKARTA PROVINCE. The strategic role of the headmaster in education requires the implementation of the school principal strengthening. This study aims to see the results of the reaction evaluation of the participants of the strengthening school principal, held by the BPSDM DKI Jakarta province with the evaluation model of Kirkpatrick Level 1. The method used is a descriptive evaluative with the survey method. The instruments used are questionnaires. Sampling with a random sampling purpose technique and selected 90 participants from the total population of 900 people. The results showed an average of the participants’ overall response to the faculty evaluation element of 3.61, so it could be stated that the Participants had a very good perception of the whole teacher. The average is obtained because the quality of module and quality of organizers have been good, while the quality of facilities and infrastructure is very good. The conclusion of this research is the response of participants in the implementation of the school's strengthening training (MCC) is very good towards the teacher evaluation element. So also the participants ' response to the quality of the modules and organizers is good, and the response is excellent to the facilities and infrastructure.

scholarly journals Opening Material as the Possibility of Elimination Veining in Foundries

2016 ◽  
Vol 16 (3) ◽  
pp. 157-161 ◽  
Author(s):  
M. Hrubovčáková ◽  
I. Vasková ◽  
M. Benková ◽  
M. Conev
Keyword(s):  
Thermal Conductivity ◽  
Particle Size ◽  
Thermal Expansion ◽  
Cast Iron ◽  
Granular Material ◽  
Surface Defects ◽  
Silica Sand ◽  
Iron Castings ◽  
Thermal Dilatation

Abstract The main bulk density representation in the molding material is opening material, refractory granular material with a particle size of 0.02 mm. It forms a shell molds and cores, and therefore in addition to activating the surface of the grain is one of the most important features angularity and particle size of grains. These last two features specify the porosity and therefore the permeability of the mixture, and thermal dilatation of tension from braking dilation, the thermal conductivity of the mixture and even largely affect the strength of molds and cores, and thus the surface quality of castings. [1] Today foundries, which use the cast iron for produce of casts, are struggling with surface defects on the casts. One of these defects are veining. They can be eliminated in several ways. Veining are foundry defects, which arise as a result of tensions generated at the interface of the mold and metal. This tension also arises due to abrupt thermal expansion of silica sand and is therefore in the development of veining on the surface of casts deal primarily influences and characteristics of the filler material – opening material in the production of iron castings.

scholarly journals Application of Analytical Hierarchy Process in Teaching Quality Analysis of English Writing

2020 ◽  
Vol 15 (14) ◽  
pp. 137
Author(s):  
Xiaoqin Zhang ◽  
Shengxin Wang ◽  
Yanling Cao ◽  
Guangqi Chen
Keyword(s):  
Analytical Hierarchy Process ◽  
Evaluation System ◽  
Evaluation Method ◽  
Evaluation Model ◽  
Teaching Quality ◽  
Quality Analysis ◽  
English Writing ◽  
Evaluation Systems ◽  
Hierarchy Process

There are two major problems in the evaluation of the teaching quality of English writing: the weak logic of the evaluation system and the low reliability of the evaluation model. To solve the problems, this paper put forward an evaluation method for the teaching quality of English writing based on the analytical hierarchy process (AHP). Firstly, the authors reviewed the current evaluation methods for the teaching quality of English writing. Next, hierarchical evaluation systems were established for the teaching quality of English writing from the perspectives of teachers and students, respectively. After that, the AHP method and the grey theory were introduced to set up an evaluation model for the teaching quality of English writing. Finally, several strategies were presented to improve the teaching quality of English writing. The proposed evaluation systems and model enriched the theories on teaching quality evaluation of English writing, and promoted the teaching quality of English writing.

scholarly journals Show cave websites in Serbia: Evaluation and potential improvements

2021 ◽  
Vol 9 (1) ◽  
pp. 11-25
Author(s):  
Aleksandar Antić ◽  
Nataša Dragović ◽  
Nemanja Tomić
Keyword(s):  
Evaluation Model ◽  
Tourism Industry ◽  
Website Design ◽  
Crucial Aspect ◽  
Website Evaluation ◽  
Cave Management ◽  
Show Caves ◽  
Show Cave ◽  
Negative Factors

Show caves and speleotourism can have a major impact on the tourism industry as well as the local and regional economic development. Promotion is a crucial aspect of generating plans and strategies for tourist caves. In the case of speleotourism, promotion needs to be professional, attractive and continuous because caves are often considered to be dangerous and inaccessible places. The main goal of this paper is to determine the quality of official show cave websites in Serbia. The assessment included the application of modified Website evaluation model. Website design techniques were also assessed, including the performance and the degree of optimization for search engines SEO. The results show extreme deficiencies and weaknesses regarding the level of internet promotion of Serbian show (tourist) caves. These results are of great importance for cave management teams and tourist organizations because they point out the negative factors of cave promotion in Serbia that need to be revised.

scholarly journals Construction of Evaluation Model of Dynamic Stratified Grade Point of Automobile Electrical System Diagnosis Course

2017 ◽  
Vol 1 (1) ◽  
pp. 176
Author(s):  
Fang Wang ◽  
Jingbing Lu ◽  
Weiqin Diao
Keyword(s):  
Grade Point Average ◽  
Theoretical Basis ◽  
Evaluation Model ◽  
Electrical System ◽  
Grade Point ◽  
Accurate Evaluation ◽  
Academic Achievements ◽  
Whole Process ◽  
System Diagnosis

The accurate evaluation of a course determines the quality of learning and is the basis for evaluating the students' academic achievements. This paper, on the theoretical basis of grade point, builds a dynamic stratified GPA (Grade Point Average) evaluation model for the course Automotive Electrical System Diagnosis, focuses on the whole process assessment and aims to stimulate the enthusiasm of learning to meet the demands of the training of social skilled talents.

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