scholarly journals Research of a contact impact of a root crop with a screw auger

2020 ◽  
Vol 66 (No. 1) ◽  
pp. 33-42
Author(s):  
Viktor Baranovsky ◽  
Olena Truchanska ◽  
Maria Pankiv ◽  
Valentina Bandura
Keyword(s):  
Process Model ◽  
Empirical Process ◽  
Experimental Studies ◽  
Kinematic Parameters ◽  
Fodder Beet ◽  
Root Crop ◽  
Cleaning System ◽  
Screw Diameter ◽  
Contact Impact ◽  
Further Development

The purpose of this research is the further development of the methodology and methods of optimising the parameters of root pile  combined cleaners of a root crop harvesting machine. We have conducted theoretical and experimental studies of the combined  cleaning system’s functioning process. By executing the analysis, we found the motion of the fodder beet through the working surfaces of the feeding conveyor and the auger installed above it. We have got an analytical and empirical process model for the fodder beet’s oblique sub-hit on the auger turn. It characterises the dependence of the total rate of the sub-hit coefficient of the technological  interaction of the roots and the depth of the root damage, which depend on the main parameters of the combined cleaning system. We found out the rational limits of the basic structural and kinematic parameters of the combined cleaning system by the provided minimum fodder beet damage. It is theoretically justified that the minimum damage to roots of the beet roots will be at a contact angle of zero (γ ≅ 0) or close to it. This condition is protected with the following combinations of parameters: a screw diameter of D = 0.4, 0.6, 0.8 m and a screw speed of n = 99, 72, 50 rpm, respectively.

scholarly journals DETERMINATION OF TECHNICAL-AND-ECONOMIC INDICES OF ROOT CROP CONVEYER-SEPARATOR DURING THEIR MOTION ON CURVED PATH

2020 ◽  
Vol 61 (2) ◽  
pp. 175-182
Author(s):  
R.B. Hevko ◽  
I.G. Tkachenko ◽  
N.I. Khomyk ◽  
Y.P. Gumeniuk ◽  
I.V. Flonts ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Efficient Design ◽  
Key Factors ◽  
Kinematic Parameters ◽  
Root Crop ◽  
Root Crops ◽  
Rubber Belt ◽  
Variable Direction ◽  
Economic Indices ◽  
The Impact

The results of theoretical and experimental study of the process of root crops carrying by a conveyer-separator of a three-row trailed root crop harvester whose rubber belt with rods is equipped with scrapers and has a sign-variable direction of transportation to minimize the machine length have been described in the article. Some analytical dependencies describing the impact of design and kinematic parameters of the conveyer-separator on the root crops motion pattern have been given and analysed. The results of the research including the key factors identification affecting the process of root crops transportation on the curvilinear path between the conveyer-separator members are presented in the experimental part. The theoretical and experimental studies have been compared and the boundaries of the most efficient design and kinematic parameters choice of the conveyer-separator under discussion have been suggested.

scholarly journals EXPERIMENTAL STUDIES OF QUALITY INDICATORS OF THE TRANSPORT CLEANING SYSTEM

2020 ◽  
Vol 6 (42) ◽  
pp. 177
Author(s):  
M. Pankiv ◽  
M. Pidhurskyi
Keyword(s):  
Quality Indicators ◽  
Technological Process ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Regression Equations ◽  
Factorial Experiments ◽  
Kinematic Parameters ◽  
Root Crops ◽  
Cleaning System ◽  
Clearing System

The efficiency of the technological process of cleaning root crops from impurities is ensured by developing, justifying the parameters and application of advanced cleaning systems of the heap of root crops. The description of a design and the principle of work of transport and clearing system of a heap of root crops is resulted. According to the results of field planned factorial experiments, regression equations were obtained, which characterize the change of components of the heap of root crops depending on the structural and kinematic parameters of the transport and cleaning system and the operating conditions of the root harvesting machine. The results of the study are the prerequisites for the development of methodology and methods for optimizing the parameters of treatment systems of root harvesting machines.Kеу wоrds: loading conveyor, cleaning slide, auger system, roots, general impurities, damage to roots.

Ball Grid Array Thermomechanical Response During Reflow Assembly

1996 ◽  
Vol 118 (4) ◽  
pp. 214-222 ◽  
Author(s):  
T. E. Voth ◽  
T. L. Bergman
Keyword(s):  
Process Model ◽  
Experimental Studies ◽  
Ball Grid Array ◽  
Mechanical Processing ◽  
Processing Conditions ◽  
System Behavior ◽  
Reflow Soldering ◽  
Thermomechanical Response ◽  
Model Predictions ◽  
Representative System

The thermomechanical response of ball-grid array assemblies during reflow soldering is considered here. Experiments are performed to investigate the thermomechanical response of a representative system and the results are used to validate a numerical model of system behavior. The conclusions drawn from the experimental studies are used to guide development of a process model capable of describing more realistic BGA soldering scenarios. Process model predictions illustrate the system’s thermomechanical response to thermal and mechanical processing conditions, as well as component properties. High thermal conductivity assemblies show the greatest sensitivity to mechanical loading conditions.

THE HEAP PARTS MOVEMENT ON THE SHAREBOARD SURFACE OF THE POTATO HARVESTING MACHINE

2021 ◽  
Vol 14(63) (1) ◽  
pp. 127-140
Author(s):  
Serhii HRUSHETSKYI ◽  
Vitaly YAROPUD ◽  
Ihor KUPCHUK ◽  
Ruslana SEMENYSHENA
Keyword(s):  
Mathematical Model ◽  
Experimental Studies ◽  
Separation Process ◽  
Kinematic Parameters ◽  
Quality Performance ◽  
Machine Operation ◽  
Degree Of Damage ◽  
Total Capacity ◽  
Comparison Of The Results

The article is devoted to the problem of the reduction of tubers mechanical damages while providing qualitative indicators of the potato heap separation process. Theoretical and experimental dependences of the influence of design and kinematic parameters of the machine operation on the quality performance are obtained. Within the field of experimental studies, a field installation was made to investigate the potato harvester as a whole on the efficiency of separation, the degree of damage, the magnitude of losses and the total capacity for aggregation. Comparison of the results of theoretical and experimental studies showed that the developed mathematical model of the process of separation of potato heap is adequate.

HETEROPHYLLY IN HIPPURIS, A PROBLEM IN IDENTIFICATION

1961 ◽  
Vol 39 (5) ◽  
pp. 1099-1116 ◽  
Author(s):  
Margaret E. McCully ◽  
Hugh M. Dale
Keyword(s):  
Water Relations ◽  
Leaf Morphology ◽  
Experimental Studies ◽  
Main Criterion ◽  
Leaf Form ◽  
Diverse Origin ◽  
Great Uniformity ◽  
Further Development ◽  
Foliar Morphology

Although the primordia of all types of leaves in Hippuris show no distinguishing characteristics until they are 50 microns long, their further development is strongly influenced by their environment. At maturity they can, for convenience, be thought of as belonging to one of five types, or some intermediate of these types. The five types of leaves are: rhizome, juvenile aquatic, adult aquatic, juvenile aerial, and adult aerial. Field and experimental studies indicate that the leaf form in Hippuris is influenced by light and the water relations between the plant and its environment. There is great uniformity of foliar morphology on plants from stocks of diverse origin when grown under uniform conditions, and there is wide diversity of foliar morphology on plants of the same stock material when grown under different environments in the laboratory. Thus the taxonomic subdivision of genus Hippuris into species, varieties, and forms using leaf morphology as the main criterion appears questionable.

Validating Structural Metrics for BPEL Process Models

2020 ◽  
Author(s):  
Geoffrey Muchiri Muketha ◽  
Abdul Azim Abd Ghani ◽  
Rodziah Atan 
Keyword(s):  
Business Process ◽  
Process Model ◽  
Experimental Studies ◽  
Process Models ◽  
Business Process Execution Language ◽  
Regression Test ◽  
Correlation Tests ◽  
Business Process Execution ◽  
Structural Metrics ◽  
Model Understandability

Business process models tend to get more and more complex with age, which hurts the ease with which designers can understand and modify them. Few metrics have been proposed to measure this complexity, and even fewer have been tested in the Business Process Execution Language (BPEL) context. In this paper, we present three related experimental studies whose aim was to analyse the ability of four selected structural metrics to predict BPEL process model understandability and modifiability. We used Spearman’s rho and regression analysis in all three experiments. All metrics passed the correlation tests meaning that they can serve as understandability and modifiability indicators. Further, four of the metrics passed the regression test for understanding time implying that they can serve as understandability predictors. Finally, only one metric passed the regression test for modification time implying that it can serve as a modifiability predictor.

scholarly journals EXPERIMENTAL STUDIES OF THE PROCESS OF CUTTING THE HEAD OF CHICORY ROOTS

2021 ◽  
Vol 2 (46) ◽  
pp. 5
Author(s):  
E. Berezhenko ◽  
V. Pankiv ◽  
B. Berezhenko
Keyword(s):  
Experimental Studies ◽  
Regression Equation ◽  
Initial Speed ◽  
Kinematic Parameters ◽  
Main Mass ◽  
Methods Of Calculation ◽  
Cutting Length ◽  
Working Bodies ◽  
Root Buds ◽  
Chicory Roots

Reducing the energy consumption of the technological process of harvesting the main mass of chicory root buds is provided by developing, justifying the parameters and the use of advanced hooking modules. According to the results of field planned factor experiments, a regression equation is obtained, which characterizes the change in the cutting length of root heads from the initial speed of the knife, which is mounted rigidly on the pendulum of the copra at an angle to the direction of knife movement. The results of the study are the prerequisites for the development and improvement of methodology and methods of calculation and justification of rational structural and kinematic parameters of the working bodies of hook-harvesting modules of root-harvesting machines.Kеу wоrds: pendulum copier, hard knife, cutting length, knife speed, knife mounting angle, regression equation.

scholarly journals Autochemistry: A Research Paradigm Based on Artificial Intelligence and Big Data

2019 ◽  
Author(s):  
Thorsten Gressling
Keyword(s):  
Artificial Intelligence ◽  
Big Data ◽  
Process Model ◽  
Current System ◽  
Building Blocks ◽  
Research Paradigm ◽  
Chemistry Research ◽  
Common Process ◽  
Scientific Principles ◽  
Further Development

Artificial Intelligence technologies affect every domain and process in industry. Many solutions with different maturity levels have been created or are in development. With this paper we collect initiatives in the domain of chemical science and bring these resources together into a common process model. <div>We define ten building blocks, analyse their role in the architecture and evaluate their impact to the current system. Finally we discuss the changes and the transition that occurs to the lab worker and the chemist.<br></div><div>This paper introduces <i>Autochemistry</i> as a meme and for further development and discussion. We just can provide a first sketch to this exciting new area of scientific principles changing the anthropocentric fundament of chemistry research to a technocentric one.<br></div>

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