scholarly journals Production and Technological Parameters of Milled Peat Extraction Depending on Organization of Peat Machines Operation

2019 ◽  
Vol 105 ◽  
pp. 01002 ◽  
Author(s):  
Elena Chertkova ◽  
Victoria Sizova
Keyword(s):  
Technological Process ◽  
Cycle Time ◽  
Weather Conditions ◽  
Drying Rate ◽  
Technological Parameters ◽  
Design Standards ◽  
Peat Extraction ◽  
Milled Peat ◽  
Number Of Cycles ◽  
Thick Layers

The article presents two options of organizing the technological process of milled peat extraction with due consideration of weather conditions for peat drying. The first option of the technological process is the extraction based on cycle peat harvesting differentiation. The developed technological process of milled peat drying in thick layers based on pneumatic peat harvesting allows us to organize a technology of peat extraction with a constant cycle time, avoiding the necessity for drying rate prediction. This is due to the fact that under good weather conditions the spreading thickness of 45-50 mm is sufficient to maximize the number of harvesting cycles. Milling at roughly equal depths forms the basis for the second option of technological process. The article presents the methodology of calculating such technological parameters as cycle and seasonal harvesting, number of cycles and seasonal productivity of a harvesting machine. Seasonal harvesting and seasonal productivity of a harvesting machine are calculated by technological design standards. The analysis of calculations revealed that in the process of milled peat extraction based on cycle harvesting differentiation, it is necessary to apply coefficient 0.9 that takes into account the organization of harvesting machines operation.

scholarly journals Economic Assessment of Low Humidity Peat Production Practice

2021 ◽  
Vol 278 ◽  
pp. 01024
Author(s):  
Elena Chertkova ◽  
Victoria Sizova
Keyword(s):  
Moisture Content ◽  
Economic Assessment ◽  
Quality Parameters ◽  
Economic Feasibility ◽  
Operating Costs ◽  
Peat Extraction ◽  
Production Practice ◽  
Milled Peat ◽  
Drying Up ◽  
Number Of Cycles

The article presents a milled peat production practice based on deep bed drying up to a harvesting moisture content of 35%. The task of the developed technology is to minimize and stabilize the harvesting humidity in the field drying of peat, thereby reducing the time and thermal impact on the peat organic matter during a forced finish drying. The applied method of peat extraction provides for variable milling depth and differentiation of cycle harvesting to increase the number of cycles and the harvester seasonal output. An economic feasibility study has been carried out by the method of determining the operating costs per ton of a marketable product for each technological operation. It consists in a comparative assessment of two technological processes: the production practice based on intensification of milled peat drying up to a harvesting moisture content of 35% and the conventional harvesting of milled peat with moisture content of 45%. The developed technology of milled peat extraction makes it possible to ensure the required quality parameters in terms of humidity (≤ 35%) and to preserve natural bituminous components. Based on the economic assessment results, it has been found that there is a slight increase in operating costs per ton of a marketable product in comparison with the conventional practice.

scholarly journals Improved Calculation Methodology for Cycle Harvesting of Milled Peat

2020 ◽  
Vol 174 ◽  
pp. 01045
Author(s):  
Victoria Sizova ◽  
Elena Chertkova
Keyword(s):  
Weather Conditions ◽  
Reduction Factor ◽  
Calculation Methods ◽  
Design Standards ◽  
Production Region ◽  
Previous Cycle ◽  
Calculation Methodology ◽  
Milled Peat ◽  
Mechanical Extraction ◽  
The Given

The article presents the calculation methods for cycle harvesting of milled peat. They are recommended for the three flow sheets of milled peat production: (a) a method based on a mechanical extraction by means of tanker harvesters; (b) a separate method of peat harvesting and transporting to large stacks and (c) a method based on pneumatic peat harvesting. Positive and negative aspects of the given methods are described and the improved calculation methods for cycle harvesting of milled peat are offered. The proposed methods take into account the weather conditions of a peat production region, the decrease in the initial moisture in the second and subsequent cycles after precipitation, due to the loss of fragmented peat from the previous cycle. A drying rate reduction factor is introduced into calculations in view of the uneven spread of milled crumbs. The performed calculations show that the reduced to 15% cycle harvests are possible to use in a design in comparison with those calculated by the previous technical design standards.

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.

scholarly journals Validation of technological process of preparation hymoding cream with hyaluronic acid

2021 ◽  
pp. 27-35
Author(s):  
Т. Г. Ярних ◽  
Г. М. Мельник ◽  
О. А. Рухмакова
Keyword(s):  
Risk Assessment ◽  
Hyaluronic Acid ◽  
Technological Process ◽  
Critical Parameters ◽  
Documentary Evidence ◽  
Technological Parameters ◽  
Eligibility Criteria ◽  
Critical Control Points ◽  
Definition Of ◽  
The Impact

To date, in the mass production of medicines both in pharmaceutical companies and in pharmacies, more and more attention is paid to the practice of process validation. Validation is a key condition for the implementation of Good Manufacturing (GMP) and Pharmacy (GPP) practices, the standards of which are mandatory for medicines worldwide and in Ukraine. The aim of the work – validation of the technological process of preparation extemporaneous hymoding cream with hyaluronic acid in order to obtain documentary evidence of effective reproduction of the preparation of this medicine. The study design is based on research on the development of dosage form technology, analysis of the impact of critical manufacturing points and evaluation of their impact on the final quality of the cream, taking into account the requirements of GPP. The object of validation is the technological process of preparation hymoding cream with hyaluronic acid. The validation procedure was performed on 3 experimental batches of the medicine. In order to check and optimize the selected technological process of preparation hymoding cream in pharmacies, its validation was carried out. According to the calculated quantities of the components of the studied cream, as well as the identified critical parameters, three batches of the medicine of 100.00 g were developed. On the series of cream, the optimization of technological parameters, testing of critical parameters for all planned stages of production with the definition of eligibility criteria and validation scheme was carried out. Acceptance criteria for all critical parameters were determined during the optimization of technology on batches of the studied medicine. The general risk assessment was carried out at the stage of pharmaceutical development according to the procedure «identification – analysis – risk assessment» to determine the scheme of validation work on batches of the medicine. During the technological process, critical indicators were checked and appropriate forms were filled out. A study on the validation of the technological process of preparation hymoding cream with hyaluronic acid in pharmacies was performed. Documentary evidence of effective reproduction of the manufacture of this medicine has been obtained. A comprehensive analysis of the developed manufacturing process makes it possible to identify critical control points that minimize the occurrence of possible risks in the manufacture of the investigated medicine. According to the results of the research, it can be concluded that the developed cream with hyaluronic acid meets the requirements of State Pharmacopoeia of Ukraine in all quality indicators, which allows to recommend it for use in dermatology.

scholarly journals Yield and some quality traits of winter wheat (Triticum aestivum L.) grain as influenced by the application of different rates of nitrogen

2013 ◽  
Vol 66 (3) ◽  
pp. 67-72 ◽  
Author(s):  
Elżbieta Harasim ◽  
Marian Wesołowski
Keyword(s):  
Winter Wheat ◽  
Nitrogen Fertilization ◽  
Weather Conditions ◽  
Triticum Aestivum L ◽  
Quality Traits ◽  
Technological Parameters ◽  
Study Results ◽  
Soil Complex ◽  
Basic Quality ◽  
The University

A field study was conducted in the period 2004–2007 at the Czesławice Experimental Farm, belonging to the University of Life Sciences in Lublin, on loess-derived grey brown podzolic soil (good wheat soil complex). This study determined the effect of two levels of nitrogen fertilization on yield and the basic quality traits of grain of the winter wheat cultivar ‘Muza’. The study results show the dependence of the grain quality characters mainly on variable weather conditions throughout the study period and to a lesser extent on the level of nitrogen fertilization. Good technological parameters were obtained in the seasons with low rainfall and high air temperature. The study also demonstrated that the higher rate of nitrogen tended to have a positive effect on total protein and wet gluten content, falling number, sedimentation value, and grain test weight. In spite of the lack of significant differences, the quality of gluten was found to decrease with the increasing rate of nitrogen.

scholarly journals CHOICE THE RESTORING METHOD OF DETAILS BY QUALITY CRITERIA

2020 ◽  
Vol 1 (46) ◽  
pp. 83-91
Author(s):  
Horbenko S ◽  
Keyword(s):  
Surface Layer ◽  
Technological Process ◽  
Quality Criteria ◽  
Technological Parameters ◽  
Ion Nitriding ◽  
Optimal Method ◽  
Advantages And Disadvantages ◽  
Modification Process ◽  
Object Of Study ◽  
Quantitative Indicators

The purpose of the article is to analyze the existing methods of surface layer modification and to choose such a method of restoration of parts, which takes into account the quality criteria that affect the op­erational properties and ensure their required level after the modification process. The main methods of surface layer modification are considered in the article, the main advantages and disadvantages of technological process that can be applied are analyzed and systematized. In the article quantitative indicators of the main technological parameters of each of the considered methods of restoration of operational properties are considered and presented as a table. According to the results of the analysis, a method for choosing a rational technological process of res­toration was proposed and criteria were formed according to which the most optimal method of surface layer modification would be fulfilled. . The object of study is the quality criteria and the basic methods for restoring the performance of en­gine parts that satisfy these criteria. Using the developed methodology and the data from Table 2, a diagram of the dependence of energy consumption costs, which will be consumed when provided with a layer of certain hardness for a given thickness, was constructed. Based on the analysis, which included a comparison of the characteristics of surface hardening meth­ods and their evaluation by quality criteria, it was found that the most promising method is ion nitriding and laser thermal hardening. KEYWORDS: MODIFICATION, SURFACE LAYER, RESTORATION, QUALITY CRITERIA

scholarly journals Study of technological parameters and the numerical indicators of the quality of crude materials of canadian goldenrod herb (Solidago canadensis L.)

2018 ◽  
pp. 64-68
Author(s):  
F. Sh. Suleymanova ◽  
O. V. Nesterova ◽  
A. A. Matyushin
Keyword(s):  
Hydrochloric Acid ◽  
Free Volume ◽  
Technological Process ◽  
Solidago Canadensis ◽  
Technological Parameters ◽  
Specific Mass ◽  
Extractive Substances ◽  
Ash Residue ◽  
Mass Volume

The article presents the results of a study of technological parameters (specific mass, bulk mass, volume mass, porosity, quantity cavities between particles, free volume of a layer of the crude materials and coefficient of absorption of solvents) and individual the numerical indicators of the quality (moisture; ash residue: total and insoluble in 10% solution of hydrochloric acid; chopped crude materials; extraneous materials) of the Canadian goldenrod herb. The content of extractive substances was determine. The obtained data will be used in the technological process in the production of extraction preparations.

scholarly journals Assessment of Influence of Technological Parameters on Peat Extraction

2020 ◽  
Vol 174 ◽  
pp. 01039
Author(s):  
Olga Puhova ◽  
Vladimir Lebedev
Keyword(s):  
Ground Water ◽  
Water Level ◽  
Water Regime ◽  
Weather Conditions ◽  
Ground Water Level ◽  
Water Level Fluctuations ◽  
Peat Deposit ◽  
Technological Parameters ◽  
Open Drainage ◽  
Moisture Movement

The article evaluates the weather and hydrological impact on geotechnology when fragmented peat is milled and dried at a peat deposit. The amount of moisture feeding the fragmented peat of a deposit was studied and was determined to depend on the ground water level. The influence of drainage on the water regime of a high-more peat deposit and that of weather conditions on ground water level fluctuations over time have been evaluated at production sites with an open drainage network. When a peat deposit is drained, under the action of gravitation (the pressure differential in the ground and a drain), ground water seeps into the drains and is transported along them, down-grade, to the collection network and diverted from the drained area. The processes of moisture movement at a peat deposit help evaluate and justify measures to improve its water-air regime which is used in the development of intensive draining methods for a peat deposit and the maintenance of the necessary water regime in peat deposits.

Clarification of the method substantiation of parameters energy remedy for the performance of technological operations in inter rows of industrial orchards of a walnut

2020 ◽  
pp. 227-234
Author(s):  
S. O. Krupych
Keyword(s):  
Regression Analysis ◽  
Technological Process ◽  
Lateral Displacement ◽  
Traction Force ◽  
World Market ◽  
Technological Parameters ◽  
The World ◽  
A New Technique ◽  
Working Bodies

Annotation Purpose. Improving the methodology of substantiation of the selection of energy means for performing technological operations in walnut orchards, which is the basis for further determination of their rational parameters. Methods. The research uses the principles of systems analysis, as well as monographic and graph analytical methods. Results. Performing technological operations in walnut orchards requires special features from tractors: movement in the rows of the garden without damaging the tree crown; providing aggregation of symmetrical machines and with lateral displacement; availability of a universal hydraulic system for the drive of working bodies; to provide statistical and dynamic stability when hanging agricultural machines. To achieve this goal, it is advisable to consider the tractor on a two-parameter classification system, ie the transition from traction to traction-energy concept, take into account the traction force of the tractor on the hook and the effective power of the tractor engine. To substantiate the parameters of the energy means of performing technological operations in perennial walnut plantations, an algorithm is proposed that allows taking into account the technical and technological parameters of MTU. It is developed on the basis of information on the technologies of growing walnuts available on the world market and technical means for their implementation. It is developed on the basis of information about the technologies and technical means of walnut production available on the world market and allows carrying out their system-structural analysis. The identification of domestic and foreign energy remedy available on the market to ensure the technological process of walnuts production was carried out and correlation-regression analysis was performed, which allowed establishing the relationship between tractor cost and their parameters: engine power, operating weight. The proposed dependences make it possible to substantiate the rational (optimal) parameters of the technical support of the entire technological process with different subject-production characteristics. Conclusions. Based on the analysis of existing methods of substantiation of parameters of energy remedy for technological operations of agricultural production it is established that specialized methods that would take into account the peculiarities of walnut production absent. A new technique has been developed that will increase the efficiency of substantiation of energy parameters during the technological operations of walnut cultivation. The identification of available on the market energy remedy, machines and tools for technological operations of walnut production is carried out and their parametric and cost indicators are established. Based on these data, a regression analysis was performed, which made it possible to establish the relationships between price and their parametric indicators. Keywords: energy remedy, garden, walnuts, weight, traction force, method, rational parameters.

Optimizing SiGe HBTs technology using small-signal and high frequency noise device's modeling

2004 ◽  
Vol 809 ◽  
Author(s):  
J.G Tartarin ◽  
G. Cibiel ◽  
A. Monroy ◽  
V. Le Goascoz ◽  
J. Graffeuil
Keyword(s):  
Technological Process ◽  
High Frequency ◽  
Low Noise ◽  
Rapid Expansion ◽  
Base Layer ◽  
Frequency Noise ◽  
Small Signal ◽  
Technological Parameters ◽  
High Frequency Noise ◽  
Noise Parameters

ABSTRACTThe rapid expansion of SiGe technologies during the last decade essentially due to civil telecommunication's applications have led Si/SiGe based heterojunction bipolar transistors (HBTs) to excellent performance levels, allowing high frequency low noise circuit designs such as linear low noise amplifiers( RF noise) or also low-phase noise oscillators (LF noise). Among these technologies, the SiGe BiCMOS one integrates digital and RF functions on the same chip. Fast improvements of the technological process have been performed thanks to large efforts allowed to characterization and modeling of the devices. We have investigated on the influence of technological parameters such as Germanium profile, doping level and thickness of the base layer (5 different wafers) on the dynamic and high frequency noise performances to converge towards the optimum technological process (now available with the BiCMOS6G processed by ST microelectronics). We made use of scattering parameters [S] measurements on the devices to extract the electrical parameters of our small signal model. The high frequency noise parameters based on the electrical model (with noise sources added to the junction, resistances) are simulated and compared with the measured noise parameters of the devices. The four noise parameters (Fmin, Rn, and complex Γopt) measurements have been performed from 1 GHz to 12 GHz, and the dynamic S parameters measurements have been realized in the 40 MHz-40 GHz range. These models have been used to enable the identification of the limiting parameters on the dynamic performances and on the high frequency noise parameters.

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