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Hungarian Journal of Industry and Chemistry最新文献

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Weight Reduction of a Drone Using Generative Design 使用生成设计的无人机减重
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-16
Bálint Leon Seregi, P. Ficzere
{"title":"Weight Reduction of a Drone Using Generative Design","authors":"Bálint Leon Seregi, P. Ficzere","doi":"10.33927/hjic-2021-16","DOIUrl":"https://doi.org/10.33927/hjic-2021-16","url":null,"abstract":"Generative design has the potential to be optimized with different parameters using a design method based on artificial intelligence and by defining the design problem. The use of this method on a drone frame is presented with explanations of the various design phases. The goal of the optimisation was to be able to fit a battery with a larger capacity onto the Unmanned Aerial Vehicle and compensate for its increased weight by reducing the weight of the drone frame using a generative algorithm. As the production possibilities were limited, adaptation to the selected manufacturing technology was also taken into account during the optimization.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69557371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Experimental Implementation of a Resource-Constrained Multi-Project Scheduling Problem Solver 资源受限多项目调度问题求解器的实验实现
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-22
K. Mihály, Mónika Kulcsárné Forrai, G. Kulcsár
{"title":"Experimental Implementation of a Resource-Constrained Multi-Project Scheduling Problem Solver","authors":"K. Mihály, Mónika Kulcsárné Forrai, G. Kulcsár","doi":"10.33927/hjic-2021-22","DOIUrl":"https://doi.org/10.33927/hjic-2021-22","url":null,"abstract":"Nowadays, project-based planning and execution are becoming more and more important in product life cycles; from the conceptual idea and its design to manufacturing and maintenance. Companies execute several projects simultaneously and these projects usually share the same resources resulting in conflicting situations. Since all projects have different requirements, constraints and goals that need to be achieved, the creation of a company-wide optimal schedule is difficult if all the aspects of each project are to be taken into consideration. Our paper presents an extended model and a scheduling problem-solving approach for resource-constrained, multi-project scheduling problems. In addition to defining the theoretical solution, its experimental implementation and results are presented.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69557577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Roughness Parameters Determining Tribological Properties in Hard Turned Surfaces 决定硬车削表面摩擦学性能的粗糙度参数分析
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2021-01-01 DOI: 10.33927/hjic-2021-26
V. Molnár, I. Sztankovics
{"title":"Analysis of Roughness Parameters Determining Tribological Properties in Hard Turned Surfaces","authors":"V. Molnár, I. Sztankovics","doi":"10.33927/hjic-2021-26","DOIUrl":"https://doi.org/10.33927/hjic-2021-26","url":null,"abstract":"Hard-machined components built into automotive industrial products play an important role because they incorporate working surfaces. The machining of them is crucial; the accuracy, surface quality and lifetime have to be ensured. In this paper the tribological properties of hard-turned surfaces are characterized and analyzed based on 3D and 2D surface roughness parameters. Functional parameters that provide quantitative information about the wear resistance and fluid retention of the machined surfaces were studied. The aim of the study was to summarize the relevant roughness parameters in terms of the functionality of the surfaces and to collect experimental results for their application.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69557688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Combination of Chemical and Biological Methods for Effective Plant Protection 化学与生物相结合的有效植物保护方法
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-20
Dávid Vozik, K. Bélafi-Bakó
{"title":"Combination of Chemical and Biological Methods for Effective Plant Protection","authors":"Dávid Vozik, K. Bélafi-Bakó","doi":"10.33927/hjic-2020-20","DOIUrl":"https://doi.org/10.33927/hjic-2020-20","url":null,"abstract":"Nowadays, one of the most important challenges worldwide is the sufficient cultivation of edible plants and crops due to the rising trend in population growth and food demand. Moreover, it is important to solve this problem by implementing sustainable agriculture which prefers natural protection and tries to minimize the intervention of radical chemicals. It was confirmed recently that some synthetic pesticides are environmental hazards. Since the biological degradation of certain pesticides is slow, their bioaccumulation might cause significant damage to ecosystems, soil, natural waters, etc. Therefore, the idea of protecting crops has been extended and a new concept, “Integrated Pest Management” (IPM), introduced which involves chemical, biological and biotechnological methods together with modern cropping, cultivation and breeding technologies [1] in a way which minimizes any risk of environmental damage. To apply this concept in practice requires comprehensive knowledge of the crops, fitopathogenic microorganisms as well as their enemies, and the behaviour of chemicals (e.g. pesticides) that may be used. A field that has hardly been researched are the so-called entomopathogenic nematodes and bacteria which have been studied in Hungary for a significant period of time [2].","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49254355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
New Chaining Criteria in Dipolar Fluids Based on Monte Carlo Simulations 基于蒙特卡罗模拟的新的偶极流体链式判据
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-28
S. Nagy
{"title":"New Chaining Criteria in Dipolar Fluids Based on Monte Carlo Simulations","authors":"S. Nagy","doi":"10.33927/hjic-2020-28","DOIUrl":"https://doi.org/10.33927/hjic-2020-28","url":null,"abstract":"A new energy-based chaining criterion was introduced in dipolar systems based on an earlier article by the author, in which the probability of chaining for adjacent particles in a new formula of magnetic susceptibility was used. The probability of chaining and the magnitude of the energy criterion can be calculated from the Monte Carlo (MC) simulation values of magnetic susceptibility. The energy criterion also depends on the dipole moment and the density. At high densities, the energy criterion is well below 70−75%. In addition, it was confirmed by simulation results that the chain length distribution follows a geometric distribution. How the probability of chaining depends on the energy criterion was given empirically and two parameters were fitted to it.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46056313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature and Electric Field Dependence of the Viscosity of Electrorheological (ER) Fluids: Warming up of an Electrorheological Clutch 电流变液粘度对温度和电场的依赖性:电流变离合器的预热
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-29
S. Mester, I. Szalai
{"title":"Temperature and Electric Field Dependence of the Viscosity of Electrorheological (ER) Fluids: Warming up of an Electrorheological Clutch","authors":"S. Mester, I. Szalai","doi":"10.33927/hjic-2020-29","DOIUrl":"https://doi.org/10.33927/hjic-2020-29","url":null,"abstract":"Cognition of the temperature-dependence of intelligent fluids, e.g. electrorheological (ER) and magnetorheological (MR) fluids, is critical for their application. In this paper, the dependence of the viscosity of ER fluids on temperature and electric field strength is examined. A new correlation equation is presented to describe the dependence of the viscosity on temperature by extending the Andrade equation. Considering the dependence of viscosity on the electric field strength and temperature, that equation is used to model the warming up of an ER clutch.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46450079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Role of Water Activity in Terms of Enzyme Activity and Enantioselectivity during Enzymatic Esterification in Non-conventional Media 在非常规介质中酶酯化过程中，水活性在酶活性和对映选择性方面的作用
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-22
Piroska Lajtai-Szabó, N. Nemestóthy, L. Gubicza
{"title":"The Role of Water Activity in Terms of Enzyme Activity and Enantioselectivity during Enzymatic Esterification in Non-conventional Media","authors":"Piroska Lajtai-Szabó, N. Nemestóthy, L. Gubicza","doi":"10.33927/hjic-2020-22","DOIUrl":"https://doi.org/10.33927/hjic-2020-22","url":null,"abstract":"During enzymatic esterification in non-conventional media, the activity and enantioselectivity of the enzyme is significantly influenced by the water content of the reaction medium, which continuously changes as water is produced during the esterification. To provide constant reaction parameters, water activity should be kept constant. The commonly used salt hydrate pairs may be difficult to apply and often hinder enzyme activity. During the enantioselective esterification of racemic 2-bromopropanoic acid in various solvents (organic solvents, ionic liquids), it was proven that the conditions related to the optimal water content required for kinetic examinations can be provided without using any salt or salt hydrate pairs. This conclusion is based on the realization that the optimal water activity can be set by first determining the initial water content that is necessary to achieve the maximum reaction rate in the given solvent.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46220824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The Effect of pH on Biosurfactant Production by Bacillus Subtilis DSM10 pH对枯草芽孢杆菌DSM10生产生物表面活性剂的影响
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-25
Réka Czinkóczky, Á. Németh
{"title":"The Effect of pH on Biosurfactant Production by Bacillus Subtilis DSM10","authors":"Réka Czinkóczky, Á. Németh","doi":"10.33927/hjic-2020-25","DOIUrl":"https://doi.org/10.33927/hjic-2020-25","url":null,"abstract":"The genus Bacillus has long been known for its ability to produce many industrially useful products. These bacteria mostly produce extracellular products like organic acids, enzymes and biosurfactants. In this paper, the production of surfactin using the Bacillus subtilis strain DSM10 is investigated. Biosurfactant was produced in a lab-scale 1-liter fermenter. pH control using different bases (NH 4 OH and NaOH) was compared to observe whether the amount of produced biosurfactant or the quality of the product was influenced. The formation of the product was followed by measuring the surface tension, and the product formed was analyzed by reversed-phase chromatography. The investigation of the effect of pH control showed that it can be omitted during the fermentation of the biosurfactant. The highest concentration of surfactin ( 5 g/L) was achieved without pH control in contrast with when the pH was kept constant ( pH = 7 ).","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41904265","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Informative Environment Qualifying Index 信息化环境合格指数
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-24
Anett Utasi, V. Sebestyén, A. Redey
{"title":"Informative Environment Qualifying Index","authors":"Anett Utasi, V. Sebestyén, A. Redey","doi":"10.33927/hjic-2020-24","DOIUrl":"https://doi.org/10.33927/hjic-2020-24","url":null,"abstract":"Improvement in the quality of the environment and, as a result, in the quality of life, including environmental impact assessments and environmental management, play an important role in the practical implementation of environmental regulations. The goal of this paper is to develop a new type of quantitative environmental impact assessment method to describe changes in environmental elements as well as the environment in an objective and reliable manner for various projects, investments, plans and proposals. An easily adaptable method was sought which provides a clear and well-interpretable result on the condition of and foreseeable changes in the environment. The algorithm operates using the limit values of environmental elements set forth by national regulations. The evaluation is independent of the number of environmental parameters chosen as it was included in the informativity rates of the method. The process results in an aggregated index for qualifying the total environment but, nonetheless, the affected environmental elements and measured environmental parameters can be analysed independently. The Informative Environment Qualifying Index evaluates the environmental parameters in proportion to the strictness of the limit values. The final assessment of the total environment is performed by using varying intervals, therefore, the different cases can be compared to each other. Experts interpret the results as well as explain the changes in the state of the environment and, therefore, identify the cause-effect relationships.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45339371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Follow-up Control of a Second Order System in Sliding Mode 滑模二阶系统的随动控制
IF 0.2
Hungarian Journal of Industry and Chemistry Pub Date : 2020-12-12 DOI: 10.33927/hjic-2020-23
Márk Domonkos, Nándor Fink
{"title":"Follow-up Control of a Second Order System in Sliding Mode","authors":"Márk Domonkos, Nándor Fink","doi":"10.33927/hjic-2020-23","DOIUrl":"https://doi.org/10.33927/hjic-2020-23","url":null,"abstract":"This paper deals with an instantaneous feedback controlled inverter using sliding mode control. The theoretical contribu-tion of this paper is that a common state-space-based sliding surface design method is extended for follow-up control. Starting from the basic theory of sliding mode control, the trajectory of the error signal is modelled. The practical contri-bution of this paper is the relationship between the trajectory of the error signal and the Total Harmonic Distortion (THD) of the output voltage signal. The conditions of the sliding mode control using an Uninterruptible Power Supply (UPS) are discussed. A rectifier as a non-linear load is simulated. Experimentally validated simulation results are presented.","PeriodicalId":43118,"journal":{"name":"Hungarian Journal of Industry and Chemistry","volume":null,"pages":null},"PeriodicalIF":0.2,"publicationDate":"2020-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44227824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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