Elaboration of indices complex and additional criterion of coals and charges quality evaluation for production and prediction of required and high quality coke

2021 ◽  
Vol 77 (6) ◽  
pp. 651-664
Author(s):  
Yu. A. Zolotukhin ◽  
N. S. Andreichikov ◽  
A. Ya. Eremin ◽  
T. F. Kraskovskaya ◽  
V. V. Kuprygin
Keyword(s):  
Coke Quality ◽  
Metallurgical Coke ◽  
Quality Prediction ◽  
Material Base ◽  
Technological Properties ◽  
High Quality ◽  
Petrographic Composition ◽  
Wide Range ◽  
A Charge

Coal raw material base of coking is the main factor characterizing the quality of coke. Therefore, it is very important to know technological properties and peculiarities of coals behavior in a charge during coking process for coals charge batching and coke quality control. One of the priority directions in study coals and charges is petrographic and reflectogram analysis, which enable to obtain data related to evaluation genuine (one-valued) technological properties of coals, coal blends and charges at production of coke of required quality. Using a broad material of study, including the one carried out by the authors of the article, a wide range of application of reflectogram analysis of coals, coals blends and charges in the coking production was shown. It was demonstrated also that application of the analysis enabled to exclude the problem of “twins”, to define the degree of genetic coals recoverability and coals grades or types relation in the mixtures for the coking. Based on the elaborated by the authors reflectogram criteria of charges for coking, a strategy of coals batching was proposed, which ensures production of metallurgical coke of required and high quality and safe running of coke ovens. Based on wide experimental studies of plastic-tough properties of coal charges, porosity of coke, its X-ray structure characteristics, strength and reaction ability, theoretical ideas were formed about mechanism of interaction in a charge of petrographically nonuniform coals comprising it during coking process, by using the proposed by the authors indices of coals nonuniformity. The indices of coals, comprising the charge, nonuniformity, differ by metamorphism degree (σR) and petrographic composition (σСК), explaining regularities of forming of quality of coke from the charge with participation of petrographically nonuniform coals. The package of the factors noted by the authors, revealed in the process of the study of coals, coals blends and charges, as well as quality of coke obtained from them, enabled to elaborate a complex index of charges coking ability (К.п.к.Vo), which enables to considerably simplify the mathematical model of coke quality prediction and to increase its reliability. Mathematical models of coke quality prediction were verified and implemented at several plants of Russia.

scholarly journals Production and quality of blast furnace coke in Ukraine

2007 ◽  
Vol 1 (2) ◽  
pp. 91-96
Author(s):  
Yevgen Kovalov ◽  
Keyword(s):  
Coke Quality ◽  
Coke Production ◽  
Raw Material ◽  
Metallurgical Coke ◽  
Material Base ◽  
Preparation Methods ◽  
Blast Furnace Coke ◽  
Coal Charge ◽  
Furnace Coke

This research displays the state of metallurgical coke production in Ukrainew with special attention to the raw material base for production of coke and its quality. Besides the following essay deals with the detailed analysis of preparation methods of coal charge for coking, including thermal treatment and stamp charging and formulates the main ways of upgrading coke quality considering the rational technology of coking.

An open-source R-package and web application for high-quality probabilistic predictions in hydrology

2021 ◽  
Author(s):  
Jason Hunter ◽  
Mark Thyer ◽  
Dmitri Kavetski ◽  
David McInerney
Keyword(s):  
Open Source ◽  
Web Application ◽  
R Package ◽  
Error Model ◽  
Objective Functions ◽  
High Quality ◽  
Wide Range ◽  
Probabilistic Error

<p>Probabilistic predictions provide crucial information regarding the uncertainty of hydrological predictions, which are a key input for risk-based decision-making. However, they are often excluded from hydrological modelling applications because suitable probabilistic error models can be both challenging to construct and interpret, and the quality of results are often reliant on the objective function used to calibrate the hydrological model.</p><p>We present an open-source R-package and an online web application that achieves the following two aims. Firstly, these resources are easy-to-use and accessible, so that users need not have specialised knowledge in probabilistic modelling to apply them. Secondly, the probabilistic error model that we describe provides high-quality probabilistic predictions for a wide range of commonly-used hydrological objective functions, which it is only able to do by including a new innovation that resolves a long-standing issue relating to model assumptions that previously prevented this broad application.  </p><p>We demonstrate our methods by comparing our new probabilistic error model with an existing reference error model in an empirical case study that uses 54 perennial Australian catchments, the hydrological model GR4J, 8 common objective functions and 4 performance metrics (reliability, precision, volumetric bias and errors in the flow duration curve). The existing reference error model introduces additional flow dependencies into the residual error structure when it is used with most of the study objective functions, which in turn leads to poor-quality probabilistic predictions. In contrast, the new probabilistic error model achieves high-quality probabilistic predictions for all objective functions used in this case study.</p><p>The new probabilistic error model and the open-source software and web application aims to facilitate the adoption of probabilistic predictions in the hydrological modelling community, and to improve the quality of predictions and decisions that are made using those predictions. In particular, our methods can be used to achieve high-quality probabilistic predictions from hydrological models that are calibrated with a wide range of common objective functions.</p>

scholarly journals An Adaptive Bitrate Switching Algorithm for Speech Applications in Context of WebRTC

2021 ◽  
Vol 17 (4) ◽  
pp. 1-21
Author(s):  
Mohannad Alahmadi ◽  
Peter Pocta ◽  
Hugh Melvin
Keyword(s):  
Real Time ◽  
Data Exchange ◽  
Quality Of Experience ◽  
End User ◽  
High Quality ◽  
Content Type ◽  
Switching Algorithm ◽  
Wide Range ◽  
The Impact

Web Real-Time Communication (WebRTC) combines a set of standards and technologies to enable high-quality audio, video, and auxiliary data exchange in web browsers and mobile applications. It enables peer-to-peer multimedia sessions over IP networks without the need for additional plugins. The Opus codec, which is deployed as the default audio codec for speech and music streaming in WebRTC, supports a wide range of bitrates. This range of bitrates covers narrowband, wideband, and super-wideband up to fullband bandwidths. Users of IP-based telephony always demand high-quality audio. In addition to users’ expectation, their emotional state, content type, and many other psychological factors; network quality of service; and distortions introduced at the end terminals could determine their quality of experience. To measure the quality experienced by the end user for voice transmission service, the E-model standardized in the ITU-T Rec. G.107 (a narrowband version), ITU-T Rec. G.107.1 (a wideband version), and the most recent ITU-T Rec. G.107.2 extension for the super-wideband E-model can be used. In this work, we present a quality of experience model built on the E-model to measure the impact of coding and packet loss to assess the quality perceived by the end user in WebRTC speech applications. Based on the computed Mean Opinion Score, a real-time adaptive codec parameter switching mechanism is used to switch to the most optimum codec bitrate under the present network conditions. We present the evaluation results to show the effectiveness of the proposed approach when compared with the default codec configuration in WebRTC.

scholarly journals Enhancement of Satellite Imagesusing Image Sharpening Technique

2019 ◽  
Vol 8 (6S2) ◽  
pp. 351-354
Keyword(s):  
Image Processing ◽  
Color Image ◽  
Histogram Equalization ◽  
Grayscale Image ◽  
Original Image ◽  
High Quality ◽  
Wide Range ◽  
Equalization Technique ◽  
The Difference

In many image processing applications, a wide range of image enhancement techniques are being proposed. Many of these techniques demanda lot of critical and advance steps, but the resultingimage perception is not satisfactory. This paper proposes a novel sharpening method which is being experimented with additional steps. In the first step, the color image is transformed into grayscale image, then edge detection process is applied using Laplacian technique. Then deduct this image from the original image. The resulting image is as expected; After performing the enhancement process,the high quality of the image can be indicated using the Tenengrad criterion. The resulting image manifested the difference in certain areas, the dimension and the depth as well. Histogram equalization technique can also be applied to change the images color.

scholarly journals QUALITY PREDICTION OF DENSE POINTS GENERATED BY STRUCTURE FROM MOTION FOR HIGH-QUALITY AND EFFICIENT AS-IS MODEL RECONSTRUCTION

2019 ◽  
Vol XLII-2/W13 ◽  
pp. 95-101
Author(s):  
R. Moritani ◽  
S. Kanai ◽  
H. Date ◽  
Y. Niina ◽  
R. Honma
Keyword(s):  
Structure From Motion ◽  
Point Clouds ◽  
Quality Prediction ◽  
Construction Site ◽  
Model Reconstruction ◽  
High Quality ◽  
Bridge Column ◽  
Dense Point ◽  
Selection Of

<p><strong>Abstract.</strong> In this paper, we introduce a method for predicting the quality of dense points and selecting low-quality regions on the points generated by the structure from motion (SfM) and multi-view stereo (MVS) pipeline to realize high-quality and efficient as-is model reconstruction, using only results from the former: sparse point clouds and camera poses. The method was shown to estimate the quality of the final dense points as the quality predictor on an approximated model obtained from SfM only, without requiring the time-consuming MVS process. Moreover, the predictors can be used for selection of low-quality regions on the approximated model to estimate the next-best optimum camera poses which could improve quality. Furthermore, the method was applied to the prediction of dense point quality generated from the image sets of a concrete bridge column and construction site, and the prediction was validated in a time much shorter than using MVS. Finally, we discussed the correlation between the predictors and the final dense point quality.</p>

FACTORS OF MOTIVATION OF PURCHASE OF DRUGS - THE FOUNDATION OF ART SALES

2021 ◽  
pp. 59-63
Author(s):  
А.Н. Жарылқасын ◽  
А. Жунусов ◽  
К.Д. Шертаева ◽  
Г.Ж. Умурзахова ◽  
Г.И. Утегенова ◽  
...  
Keyword(s):  
Customer Loyalty ◽  
High Quality ◽  
Medical Products ◽  
Customer Commitment ◽  
Wide Range ◽  
The Face

В условиях серьезной конкуренции аптеки вынуждены прибегать к различным способам привлечения и удержания покупателей. Приоритетными факторами в плане воспитания и поддержания лояльности покупателей являются традиционный набор приемлемых цен, широкий ассортимент, высокое качество лекарственных средств, космецевтики и изделий медицинского назначения, а также удобное расположение аптеки и выкладка аптечных товаров. Однако сегодня это обязательные, но недостаточные атрибуты приверженности покупателей к конкретной аптеке. В данной статье рассматриваются основные элементы "искусства продаж", которые, по мнению экспертов, являются основополагающими для мотивации покупок в аптеке. In the face of serious competition, pharmacies have to resort to various means of attracting and retaining customers. Priority factors in terms of cultivating and maintaining customer loyalty are the traditional set of acceptable prices, wide range, high quality of pharmaceuticals, cosmeceuticals and medical products, as well as the convenient location of the pharmacy and the display of pharmacy products. However, today these are mandatory, but not sufficient attributes of customer commitment to a particular pharmacy. This article discusses the main elements of the "art of sales", which, according to experts, are fundamental for motivating purchases in a pharmacy.

Election Forecasts in 1984: How Accurate Were They?

1985 ◽  
Vol 18 (01) ◽  
pp. 53-62 ◽  
Author(s):  
Michael S. Lewis-Beck
Keyword(s):  
Presidential Candidate ◽  
High Quality ◽  
Election Forecasting ◽  
Personal Favorite ◽  
World Series ◽  
The Poor ◽  
Wide Range ◽  
The World ◽  
Do So

One autumn out of four, election forecasting surpasses baseball as America's national pastime. Then, everyone wants to know who will win, and everyone has a guess. Now, with the ballots carefully counted, forecasters await their awards. Below, I evaluate the quality of a wide range of 1984 presidential and congressional forecasts. The evaluation proceeds from nonscientific to scientific approaches, although this distinction is sometimes blurred. To lower the level of suspense, I should say that some forecasts turned out to be quite good. By way of conclusion, I offer a set of rules for selecting a high-quality forecasting instrument.Lucky GuessesMany popular election forecasting rules take advantage of chance, which has been working in their favor. Perhaps the most famous is the World Series forecast, which says, “If the American League wins the World Series, then the Republican presidential candidate will win.” This technique was accurate from 1952 to 1976, missed in 1980, but worked again in 1984 with the victory of the Detroit Tigers. A lesser known rule of this type, which is my personal favorite, is based on the Beaujolais wine harvest. Accordingly, “If the Beaujolais vintage looks bad, then the Republican will take the presidency.” This has held post-1960, and continues to do so with the poor 1984 crop (yielding a wine too light, with little color). There are other such rules that relate more directly to the candidates themselves and, in that sense, have more verisimilitude.

scholarly journals Regional Features of the Development of the Flax Sub-complex in the Context of Growing Crisis Phenomena

2020 ◽  
Author(s):  
И.В. Великанова ◽  
Р.А. Попов
Keyword(s):  
Linum Usitatissimum ◽  
Production Efficiency ◽  
Import Substitution ◽  
Raw Material ◽  
Main Task ◽  
Material Base ◽  
Fibre Flax ◽  
Regular Production ◽  
Wide Range

Целью настоящей работы является оценка состояния льноводства в Российской Федерации в целом и в отдельных льносеющих регионах, выявление текущих проблем в отрасли, изучение программ государственной поддержки льняного комплекса и определение возможностей для его развития. В процессе исследования использовался широкий спектр аналитических методов изучения экономических явлений – монографический, статистический и другие. Особое внимание уделялось сопоставимости показателей для анализа динамики изучаемых процессов. Для России лён-долгунец – важнейшая техническая культура, максимально адаптированная к её почвенно-климатическим условиям, позволяющая в значительной мере обеспечить импортозамещение хлопка. Основная задача, стоящая перед льняной отраслью сегодня – создание надёжной отечественной сырьевой базы для льноперерабатывающих предприятий. От её решения зависит экономическая и стратегическая безопасность страны, которая определяется необходимостью наличия отлаженного производства отечественного волокнистого сырья и продуктов его переработки гражданского и оборонного назначения. Исследования показали, что реализуемые меры по поддержке отрасли на федеральном и региональном уровнях положительно влияют на её состояние, но пока не могут обеспечить высокую эффективность производства. Валовые сборы льноволокна не растут и стабилизировались на уровне 40 тыс. тонн, а площади посева льна-долгунца не достигают и 50 тыс. гектаров. Низким остаётся и качество льнопродукции. В условиях высокой затратности производства льнопродукции, диспаритета цен, недостаточного уровня инвестиций рентабельность производства льнопродукции довольно низка. Важными и актуальными задачами в развитии льняной отрасли являются увеличение объёмов и эффективности производства льна, повышение качества волокнистой и семенной продукции, техническая и технологическая модернизация льноводства. Поэтому, наряду с действующими программами (льготное кредитование, лизинг техники, субсидирование затрат), необходима разработка целевой комплексной программы «Развитие льняного подкомплекса региона», охватывающей не только сельскохозяйственных товаропроизводителей, но и предприятия перерабатывающей и лёгкой промышленности. The purpose of this work is to assess the state of flax cultivation in the Russian Federation as a whole and in certain flax-sowing regions, to identify current problems in the industry, to study state support programs for the flax complex and to determine opportunities for its development. A wide range of analytical methods for studying economic phenomena – monographic, statistical and others was used in the research process. Particular attention was paid to the comparability of indicators for the analysis of the dynamics of the studied processes. For Russia, the fibre flax (Linum usitatissimum) is the most important industrial crop adapted to its soil and climatic conditions as much as possible, which allows to significantly ensuring the import substitution of cotton. The main task facing the flax industry today is to create a reliable domestic raw material base for flax processing enterprises. The economic and strategic security of the country depends on its decision which is determined by the need for regular production of domestic fibrous raw materials and its derived products for civil and defense purposes. Researches have shown that the measures implemented to support the industry at the federal and regional levels positively affect its condition, but so far cannot ensure high production efficiency. Whole yields of flax fiber do not increase and have stabilized at the level of 40 thousand tons and the area of planting fibre flax (Linum usitatissimum) does not reach 50 thousand hectares. The quality of flax products remains low. In conditions of high cost of flax production, price disparity, insufficient level of investments, the profitability of flax production is rather low. Important and relevant tasks in the development of the flax industry are increasing the volume and efficiency of flax production, improving the quality of fibrous and seed products and technical and technological modernization of flax cultivation. Therefore, along with existing programs (easy credit terms, finance lease of equipment, subsidizing of costs) it is necessary to develop a targeted integral program "Development of the flax sub-complex of the region", covering not only agricultural commodity producers but also enterprises of the processing and light industries.

scholarly journals Observe and be mindful

2019 ◽  
Vol 13 (2) ◽  
pp. 95-96
Author(s):  
Jorge M Mizusaki
Keyword(s):  
Quality Of Life ◽  
Working Conditions ◽  
Technological Development ◽  
Scientific Development ◽  
High Quality ◽  
Social Wellbeing ◽  
Wide Range ◽  
Ankle And Foot

The members of ABTPé deserve recognition for the effective and prolific work they produce when the goal is scientific, with emphasis on our professional improvement. The concern about technical and scientific development and improvement of the association’s members is clearly highlighted by the high quality of our presentations. In our country of continental dimensions, we see many different approaches that we can apply to patients in a search for the best solutions for individuals affected by ankle and foot conditions. When evaluating our results, the interest and rights of patients should be considered, and therefore, we must keep in mind the need to accurately plan our routine practices. The care for these individuals should include a wide range of services that promote their psychological and social wellbeing and their working conditions. This is how we view a broader perspective that involves questions reflecting on how our actions affect individuals’ lives. This concern should also address the needs regarding our own quality of life. It thus becomes necessary to identify and focus on the factors that are worth the expenditure of our energy and to act mindfully in the pursuit of rewards for our actions. The diversity of our practice has demonstrated that we will be able to keep pace with technological development and apply it in a way that preserves the greater interest of patients. The format of this care will be very important in light of the enormous variety of disorders that affect the feet, as shown by the number of subjects addressed in this edition. Have a great reading. Act ethically, be mindful.   Jorge Mitsuo MizusakiEditor-in-Chief

scholarly journals Smart City Technology: Ecological Sustainability

2021 ◽  
Vol 295 ◽  
pp. 01032
Author(s):  
Anton Nazarov ◽  
Natalya Tovmasyan ◽  
Denis Kovtun
Keyword(s):  
Smart City ◽  
Smart Cities ◽  
Modern Society ◽  
Well Being ◽  
Ecological Sustainability ◽  
High Quality ◽  
Wide Range ◽  
Quality Of Living ◽  
High Level

The Smart City concept includes a fairly wide range of characteristics of this new phenomenon for modern society. The main goal of creating smart cities is the comfortable living in them of people with a high level of well-being. The quality of living conditions for people in smart cities directly depends on how clean their natural environment is. The article examines the features of the development of the ecological vector of creating cities with maximum amenities for residents. Possible risks associated with negligence towards objects of animate and inanimate nature are listed, ways of high-quality environmental protection of cities of the future are outlined.

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