Development of Flux for Protection of the Surface of Liquid-Metallic Low-Melting-Point Fusible Melt

2020 ◽  
Vol 854 ◽  
pp. 126-132
Author(s):  
Aleksei V. Sivenkov ◽  
Olga S. Chirkova ◽  
Darina A. Konchus ◽  
Andrey V. Mihailov
Keyword(s):  
Sample Surface ◽  
Coated Sample ◽  
Practical Application ◽  
High Quality ◽  
Diffusion Coatings ◽  
Nickel Coatings ◽  
Prolonged Contact ◽  
Negative Effect ◽  
Metal Products ◽  
Vacuum Furnaces

The results of the development of the flux CaO-Li2CO3-B2O3, operating in the oxidizing environment of the furnace, are shown. Flux is used to protect the melt from oxidation and removal of oxides from the coated sample surface. The use of this flux in open furnaces made it possible to apply high-quality nickel coatings with a thickness of 18 μm, which is comparable to the thickness of coatings obtained in vacuum furnaces in argon atmosphere. The negative effect of flux components on the sample surface was noted during prolonged contact under the conditions of the oxidizing environment of the furnace. Practical application of the research results will provide high-quality diffusion coatings on metal products. In addition, economic efficiency is maintained through accessibility of the equipment and flux components.

scholarly journals A Proposed Land Exchange Algorithm for Eliminating the External Plot Patchwork

Land ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Żanna Stręk ◽  
Przemysław Leń ◽  
Justyna Wójcik-Leń ◽  
Paweł Postek ◽  
Monika Mika ◽  
...  
Keyword(s):  
Spatial Structure ◽  
Rural Areas ◽  
Agricultural Land ◽  
Test Sample ◽  
Practical Application ◽  
Exchange Algorithm ◽  
The World ◽  
Negative Effect ◽  
Structure Improvement ◽  
Land Exchange

In many countries of the world, rural areas are characterized by a defective spatial structure of agricultural land. The most frequent defects are large fragmentation and distribution of farmland. The fragmentation of land has been an issue widely described by many authors throughout the world. The problem of the distribution of land owned by individual farmers is slightly different, since due to the complexity of the problem this issue was not widely explored in Poland (plot patchwork) or in other countries of Europe and the world. Land fragmentation and distribution of plots in rural areas has a negative effect on the profitability and efficiency of agricultural production. Land consolidation and exchange is an operation facilitating spatial structure improvement. The authors attempted to develop a universal land exchange algorithm for eliminating the external plot patchwork. As it turns out, so far no land exchange algorithm has been developed. Specific analyses were carried out in Puchaczów commune, county of Łęczna, Lublin voivodeship in the eastern part of Poland, covering an area of 6907.80 ha, split into 15,211 plots. The chequerboard arrays method was used. The publication presents the algorithm and its practical application using a test sample. A result of the studies is a proposal concerning the exchange of land between landowners in the villages of the commune of Puchaczów. Using the algorithm, the area of individual lands in the commune, after the exchange, will increase by 172.09 ha, which is 2.5% for the area of individual lands, and 1.9% for the commune.

scholarly journals Semi-Supervised Multi-View Clustering with Weighted Anchor Graph Embedding

2021 ◽  
Vol 2021 ◽  
pp. 1-22
Author(s):  
Senhong Wang ◽  
Jiangzhong Cao ◽  
Fangyuan Lei ◽  
Qingyun Dai ◽  
Shangsong Liang ◽  
...  
Keyword(s):  
State Of The Art ◽  
Graph Embedding ◽  
Multiple Views ◽  
Time Cost ◽  
Practical Application ◽  
Real World Data ◽  
High Quality ◽  
Free Graph ◽  
Anchor Points ◽  
Almost All

A number of literature reports have shown that multi-view clustering can acquire a better performance on complete multi-view data. However, real-world data usually suffers from missing some samples in each view and has a small number of labeled samples. Additionally, almost all existing multi-view clustering models do not execute incomplete multi-view data well and fail to fully utilize the labeled samples to reduce computational complexity, which precludes them from practical application. In view of these problems, this paper proposes a novel framework called Semi-supervised Multi-View Clustering with Weighted Anchor Graph Embedding (SMVC_WAGE), which is conceptually simple and efficiently generates high-quality clustering results in practice. Specifically, we introduce a simple and effective anchor strategy. Based on selected anchor points, we can exploit the intrinsic and extrinsic view information to bridge all samples and capture more reliable nonlinear relations, which greatly enhances efficiency and improves stableness. Meanwhile, we construct the global fused graph compatibly across multiple views via a parameter-free graph fusion mechanism which directly coalesces the view-wise graphs. To this end, the proposed method can not only deal with complete multi-view clustering well but also be easily extended to incomplete multi-view cases. Experimental results clearly show that our algorithm surpasses some state-of-the-art competitors in clustering ability and time cost.

scholarly journals Análisis comparativo de una metaheurística en base a algoritmo genético vs un método de ramificación y corte para un caso de entrega y recolección con restricciones de ventana de horario

2017 ◽  
Vol 1 (2) ◽  
Author(s):  
Fabian López
Keyword(s):  
Time Window ◽  
Time Frame ◽  
Branch And Cut ◽  
Pickup And Delivery ◽  
Np Hard ◽  
Practical Application ◽  
High Quality ◽  
Method Of Solution ◽  
Time Window Constraints ◽  
Computational Resources

Palabras claves: Algoritmos genéticos, logística de ruteo, metaheuristicas, secuenciaciónResumen. En la solución de problemas combinatorios, es importante evaluar el costo-beneficio entre la obtención de soluciones de alta calidad en detrimento de los recursos computacionales requeridos. El problema planteado es para el ruteo de un vehículo con entrega y recolección de producto y con restricciones de ventana de horario. En la práctica, dicho problema requiere ser atendido con instancias de gran escala (nodos ≥100). Existe un fuerte porcentaje de ventanas de horario activas (≥90%) y con factores de amplitud ≥75%. El problema es NP-hard y por tal motivo la aplicación de un método de solución exacta para resolverlo en la práctica, está limitado por el tiempo requerido para la actividad de ruteo. Se propone un algoritmo genético especializado, el cual ofrece soluciones de buena calidad (% de optimalidad aceptables) y en tiempos de ejecución computacional que hacen útil su aplicación en la práctica de la logística. Para comprobar la eficacia de la propuesta algorítmica se desarrolla un diseño experimental el cual hará uso de las soluciones óptimas obtenidas mediante un algoritmo de ramificación y corte sin límite de tiempo. Los resultados son favorables.Key words: Genetic algorithms, routing logistics, metaheuristics, schedulingAbstract. In an attempt to sovle the combinatorics problems, it is important to evaluate the costbenefit ratio between obtaining solutions of high quality and the loss of the computational resources required. The problem presented is for the routing of a vehicle with pickup and delivery of products with time window constraints. This problem requires instances of great scale (nodes≥100). A strong active time window percentage exists (≥90%) with factors of amplitude ≥75%. The problem is NP-hard and hence, the application of an exact method of solution, is limited by the time frame required for routing activity. A specialized genetic algorithm is proposed, which offers solutions of high precision and in computational times that makes its practical application useful. An experimental design is developed with good results that makes use of optimum solutions obtained by means of branch and cut algorithm without time limit.

Diffusion Saturation by Titanium from Liquid-Metal Media as Way to Increase Carbide-Tipped Tool Life

2017 ◽  
Vol 265 ◽  
pp. 181-186 ◽  
Author(s):  
A.G. Sokolov ◽  
E.E. Bobylyov
Keyword(s):  
Liquid Metal ◽  
Hard Alloy ◽  
Hard Alloys ◽  
Functional Coatings ◽  
High Quality ◽  
Diffusion Coatings ◽  
Coating Composition ◽  
The Media ◽  
Diffusion Metallization ◽  
Titanium Diffusion

The analysis of the strengths and weaknesses of the existing technologies aimed at improving the performance properties of carbide-tipped tools is presented. The results of studies into the process of diffusion metallization by titanium of a carbide-tipped tool TK type from the media of fusible liquid-metal solutions is given. The influence of titanium diffusion coatings on the durability of carbide tools is investigated. A method of providing formation on hard alloys for wear-resistant titanium high-quality functional coatings is described. The thickness of the coating varies depending on the temperature and exposure time, and ranges from 4 to 6 μm. The hardness of the coatings obtained depends on the temperature of the coating and modes of pre-carburizing, and varies from 24100 to 30000 MPa. The microstructure of the coatings is investigated. The coating consists of two layers: the coating and the transition zone, the size and hardness of which depends on the conditions of pre-carburization and modes of application of the coating. The dependence of the coatings thickness on the duration of the plates exposure in the melt, the temperature of coating composition from the coated hard alloy is investigated.

Using BP Neural Network to Predict the Sinter Comprehensive Performance: TFe and Fuel Consumption

2013 ◽  
Vol 771 ◽  
pp. 213-216
Author(s):  
Wei Chen ◽  
Bao Xiang Wang ◽  
Ying Chen ◽  
Hui Juan Zhang ◽  
Xing Li
Keyword(s):  
Neural Network ◽  
Chemical Composition ◽  
Fuel Consumption ◽  
Bp Neural Network ◽  
Raw Material ◽  
High Rate ◽  
Production Data ◽  
Practical Application ◽  
High Quality ◽  
Comprehensive Performance

The principal objective of blast furnace is to produce high quality molten iron at a high rate with a low consumption. It is very important to control sinter chemical composition and comprehensive performance. This is because the sinter is the main raw material for ironmaking. In this paper, a predictive system for sinter chemical composition TFe and the solid fuel consumption was established based on BP neural network, which was trained by actual production data. The MATLAB m file editor was used to write code directly in this paper. Practical application shows the applications of the system not only can reduce the work difficulty of technical personnel, but also can improve the hit ratio of production index and the productivity.

scholarly journals The MetaboLights repository: curation challenges in metabolomics

Database ◽  
2013 ◽  
Vol 2013 ◽  
Author(s):  
Reza M. Salek ◽  
Kenneth Haug ◽  
Pablo Conesa ◽  
Janna Hastings ◽  
Mark Williams ◽  
...  
Keyword(s):  
Experimental Data ◽  
Quality Control ◽  
Open Access ◽  
General Purpose ◽  
Complex Data ◽  
Practical Application ◽  
File Size ◽  
High Quality ◽  
Data Representations ◽  
Access Data

Abstract MetaboLights is the first general-purpose open-access curated repository for metabolomic studies, their raw experimental data and associated metadata, maintained by one of the major open-access data providers in molecular biology. Increases in the number of depositions, number of samples per study and the file size of data submitted to MetaboLights present a challenge for the objective of ensuring high-quality and standardized data in the context of diverse metabolomic workflows and data representations. Here, we describe the MetaboLights curation pipeline, its challenges and its practical application in quality control of complex data depositions. Database URL: http://www.ebi.ac.uk/metabolights

scholarly journals Diffusion Coatings as Corrosion Inhibitors

2016 ◽  
Vol 3 (1) ◽  
pp. 40-44
Author(s):  
Radoslav Ivanov ◽  
Tsveteslava Ignatova-Ivanova
Keyword(s):  
Corrosion Resistance ◽  
Diffusion Saturation ◽  
Metal Base ◽  
Diffusion Coatings ◽  
Diffusion Layers ◽  
Steel Container ◽  
Structure Thickness ◽  
Metal Products ◽  
Composition Structure ◽  
Harmful Effects

Abstract Corrosion is the cause of irretrievable loss of huge amounts of metals and alloys. The harmful effects of corrosion can be reduced significantly by applying appropriate methods of corrosion protection. One method to protect metals against corrosion is the formation of diffusion coatings on them. High corrosion resistance is typical for the boride diffusion layers. Aluminothermy is one of the main methods for diffusion saturation of the surface of metal products with various elements, including boron, and under certain conditions with aluminum, too. Samples of steel 45 were put to aluminothermic diffusion saturation with boron in a pressurized steel container at a temperature of 1100K, for 6 hours in powdered aluminothermic mixtures. The content of В2О3 in the starting mixtures decreased from the optimum - 20% to 0%, and the content of Al and the activator - (NH4)2.4BF3 is constant, respectively 7% and 0.5%. Al2O3 was used as filler. The borided samples were tested for corrosion resistance in 10% HCl for 72 hours. The results show that their corrosion resistance depends on the composition of the starting saturating mixture (mainly on the content of В2О3), and respectively on the composition, structure, thickness and degree of adhesion of the layer to the metal base.

Design and Realization of Quality Control System for Individual Character Manufacturing

2010 ◽  
Vol 108-111 ◽  
pp. 1477-1481
Author(s):  
Xiao Hong Shen ◽  
Gao Shan Wang
Keyword(s):  
Quality Control ◽  
Control System ◽  
Process Quality ◽  
Quality Control System ◽  
Practical Application ◽  
High Quality ◽  
Synthetic Process ◽  
Customer Needs ◽  
Individual Character ◽  
Manufacturing Mode

With the progress of our society, the consumer needs present a trend of individuation. Hence the manufacturing modes of many products change to individual character manufacturing mode, in which the producer should acquire the customer needs exactly and timely and translate them to high quality products. In this process, quality control plays a key role. This paper develops a quality control system, in which a synthetic process quality judging method against individual manufacturing is adopted. The method makes up the blemish of traditional SPC method and can work well even when it lacks enough data. The practical application of the system has proved its effectiveness and practicability.

scholarly journals Grand Duchess Elizaveta Feodorovna as a patron of music education

2021 ◽  
pp. 409-420
Author(s):  
А.В. Громова
Keyword(s):  
Music Education ◽  
Quality Teaching ◽  
Practical Application ◽  
High Quality ◽  
Performance Arts ◽  
Stage Performance ◽  
And Performance

Статья посвящена покровительству Великой княгини Елизаветы Федоровны музыкальному образованию на примере двух основных московских училищ музыкального направления. Рассматриваются различные аспекты попечительства в целях качественного обеспечения учебного процесса, помощи «недостаточным учащимся», поощрения наиболее талантливых учеников, создания условий для широкого практического применения учащимися полученных знаний в лучших творческих коллективах России. Также уделено внимание содействию Великой княгини возникновению в России новых музыкальных и театральных направлений при участии преподавателей и выпускников Музыкально-драматического и Синодального училищ. The article is devoted to Grand Duchess Elizaveta Feodorovna’s activities as a patron of music education in Russia, focusing on the two main Moscow schools specializing in music as a case study. The author analyzes various aspects of her patronage aimed at providing high-quality teaching, assisting poor pupils, and encouraging the most talented ones, creating a wide basis for practical application of knowledge acquired by graduates in the best on-stage performance groups of Russia. Attention is also paid to the Grand Duchess’s effort to encourage new trends in Russian musical and performance arts through the contribution of the two Schools’ teachers and graduates.

scholarly journals STRUCTURE AND PROPERTIES MULTICOMPONENT BORIDE AND CARBIDE COATINGS FORMED IN MELTS

2020 ◽  
pp. 69-75
Author(s):  
V. A. Teldekov ◽  
L. M. Gurevich
Keyword(s):  
Corrosion Resistance ◽  
Heat Resistance ◽  
Multicomponent Diffusion ◽  
Alloying Elements ◽  
Structure And Properties ◽  
High Quality ◽  
Diffusion Coatings ◽  
Carbide Coatings ◽  
Hcl Solution

High-quality multicomponent diffusion boride and carbide layers on steel 40Cr and 25CrMnTi cemented steel were obtained by processing from 3 to 6 hours at 950 ° C in melts. The melts contained borax and ferroalloy additives. Chrome, vanadium and titanium were alloying elements. Comparative tests of heat resistance and corrosion resistance of diffusion coatings are carried out. Samples with carbide coatings Cr + V and Cr + V + Ti had the highest heat resistance. Samples with a diffusion layer based on iron borides and alloying elements showed the best corrosion resistance during long-term tests in a 10% HCl solution.

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