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Mathematical modelling of cylindrical chimney effect in solar dryer 太阳能干燥机筒形烟囱效应的数学建模
Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.36.69
G. Habtay, J. Buzás, I. Farkas
A simple mathematical model of a solar chimney is proposed for the solar dryer. The physical model was made with a cylindrical channel. Outer surface of the chimney is provided with black paint which absorbing solar radiation to heat up the air inside the chimney. Openings provided at the bottom and top of the chimney allow moist air to enter from the drying chamber and leave the channel. Steady state heat transfer equations were set determining the heat transfer coefficient and the air flow in the chimney. The thermal performance of the solar chimney as determined from the surfaces, air temperatures, and air mass flow rate are presented.
提出了太阳能干燥机烟囱的简单数学模型。物理模型是用圆柱形通道制作的。烟囱外表面涂有黑色涂料,吸收太阳辐射,使烟囱内空气升温。在烟囱的底部和顶部提供的开口允许潮湿的空气从干燥室进入并离开通道。建立了确定换热系数和烟囱内风量的稳态传热方程。从表面、空气温度和空气质量流量来确定太阳能烟囱的热性能。
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引用次数: 2
The relation between online protection regulations and the intention to ‎use e-services/age perspective : A case study from Hungary 网络保护法规与使用电子服务意愿/年龄观点之间的关系:匈牙利个案研究
Pub Date : 1900-01-01 DOI: 10.17676/HAE.2020.38.15
Pierre Alassaf, Miriam Bahna, Basem Munir El-assaf
: As more regulations to protect privacy and security for online interactions is carrying out, as more complications to perform these transactions is coming forward, affecting the intention to execute these interactions online especially for old people. This study aims to reveal the relation between intention to use high secured e-services with the age of user. This study finds that there is a positive relation between the over-40 years online users’ ages and their retreating from completing online transactions due the complications of security and privacy procedures. Also, the study finds that 85% of people feel more comfortable to execute their transactions online with the high secure regulation, but from another perspective, 60% of persons between 40- 55 years old don’t prefer doing their transactions online due to the complication of transaction security procedures, where 92% of people over 65 are avoiding to do financial transaction online and they need another person help to perform it more than 82% of times.
随着越来越多的保护在线互动隐私和安全的法规的实施,随着越来越多的复杂交易的出现,影响了在线执行这些互动的意愿,特别是对老年人来说。本研究旨在揭示使用者使用高安全性电子服务的意愿与年龄之间的关系。本研究发现,40岁以上网络用户的年龄与他们因安全和隐私程序的复杂性而放弃完成网络交易之间存在正相关。此外,研究发现,85%的人觉得在高度安全的监管下进行网上交易更舒服,但从另一个角度来看,60%的40- 55岁的人不喜欢在网上进行交易,因为交易安全程序的复杂性,其中92%的65岁以上的人避免在网上进行金融交易,他们需要他人帮助执行的次数超过82%。
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引用次数: 1
Assessment and Modeling of Industrial-Scale Solar Thermal System Application in Hungary 匈牙利工业规模太阳能热系统应用评估与建模
Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.70
Rajab Ghabour, P. Korzenszky
With approximately 1.2% growth annually, the industrial sector accounts for 54% of the total consumed energy globally. Most of those facilities use fossil fuels to generate their needs. Renewable energies, mainly solar energy, can play a major role in meeting the global policies of reducing carbon dioxide emissions. Presently, Hungarian researchers exploit more energy from renewable energies such as solar sources, wind, and biomass. Knowing that reducing the carbon emission level is a general tendency in Hungary. This article presents an extensive analysis of the solar thermal system in the central European climate, especially in Hungary. The scope of this study is the low-to-medium heat generation in industries such as pharmaceutical, pulp & paper textile, food processing and beverages. Through all the applications, the heat is consumed in hot water form. Integrating solar thermal technology in the industrial sector depends mainly on solar radiation, conventional fuel prices, available installation area, and the complexity level of integrating the solar system with the existing process. Furthermore, more challenges show up during the integration of economic difficulties. This article analyses the feasibility of providing industrial hot water for small-to-medium enterprises (SMEs) in different Hungarian counties. The analysis was performed using T*Sol 5.5 software, and metrological data were obtained by MeteoSyn built-in software. Results indicate that the most suitable region for integrating solar thermal energy was Szeged, Szolnok, and Kecskemet, which supplied 54.89%, 54.16%, and 54.03% of the total heat load for the studied case, respectively. This result accounts for 849.57, 840.25 and 839.27 kWh/m2 of specific generated heat of the solar system. In addition, it results in points that the annual carbon dioxide saved amount is up to 4,442.3 kg and 2,100.7 m3 annual amount of natural gas. In conclusion, Hungary has a potentially attractive market for solar thermal systems to provide industrial hot water for small and medium-sized factories.
工业部门的年增长率约为1.2%,占全球能源消耗总量的54%。这些设施大多使用化石燃料来满足其需求。可再生能源,主要是太阳能,可以在满足减少二氧化碳排放的全球政策方面发挥重要作用。目前,匈牙利的研究人员从太阳能、风能和生物质能等可再生能源中开发了更多的能源。知道降低碳排放水平是匈牙利的总体趋势。这篇文章提出了太阳能热系统在中欧气候的广泛分析,特别是在匈牙利。本研究的范围是制药、纸浆造纸、纺织、食品加工和饮料等行业的低至中热量产生。通过所有的应用,热量以热水的形式消耗。在工业部门整合太阳能热技术主要取决于太阳辐射、常规燃料价格、可用安装面积以及将太阳能系统与现有工艺整合的复杂程度。此外,在经济一体化的过程中出现了更多的挑战。本文分析了匈牙利不同县为中小企业提供工业热水的可行性。分析采用T*Sol 5.5软件,计量数据采用MeteoSyn内置软件获取。结果表明,seeged、Szolnok和Kecskemet是最适合集成太阳能的区域,分别占研究案例总热负荷的54.89%、54.16%和54.03%。这一结果分别为849.57、840.25和839.27 kWh/m2的太阳系比热。此外,每年可节省二氧化碳量4,442.3 kg,每年可节省天然气量2,1000.7 m3。综上所述,匈牙利有一个潜在的有吸引力的太阳能热系统市场,为中小型工厂提供工业热水。
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引用次数: 0
Dehydrating Using Combined Energy Intake Method 联合能量摄入法脱水
Pub Date : 1900-01-01 DOI: 10.17676/hae.2022.41.24
V. Madár, János Gubó, L. Toth
Our paper introduces the research and development of a new, continuously operational food dehydrator, and the prototype of said machine. Conditions related to heating technology are required for dehydrators that prevent the vegetables and fruits from suffering too much damage to their internal components. In the new system, traditional convective heat transfer was combined with microwave dehydration, which is well-known for its better efficiency. The final goal is to create an industrial system that can satisfy both small works and industrial demands, while being more energy efficient than traditional solutions, and has faster dehydration potential. However, at the same time, due to dehydrating on lower temperature, it should end up in a gentler drying process. It is fundamental to keep the valuable components of the products intact. The system is continuously operational. The material is sent via conveyor belt through the canal, while magnetrons are operating, and low- heat and moisture airflow is moving above it. Materials dried with the machine were evaluated by the Institute of Horticulture, at the Hungarian University of Agriculture and Life Sciences s (MATE).
本文介绍了一种新型连续运转食品脱水机的研制及样机。为了防止蔬菜和水果的内部成分受到过多的损害,脱水机需要与加热技术相关的条件。在新系统中,将传统的对流换热与微波脱水相结合,其效率更高。最终目标是创建一个既能满足小型工程和工业需求的工业系统,同时比传统解决方案更节能,并且具有更快的脱水潜力。然而,与此同时,由于在较低的温度下脱水,它应该在一个更温和的干燥过程中结束。保持产品中有价值的部件完好无损是至关重要的。系统持续运行。物料通过传送带通过管道输送,同时磁控管运行,低热低湿气流在物料上方流动。用机器干燥的材料由匈牙利农业和生命科学大学园艺研究所(MATE)进行评估。
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引用次数: 0
Testing axial flow solar chimney turbine using wind tunnel 利用风洞试验轴流太阳能烟囱涡轮机
Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.59
W. M. Elmagid
The solar chimney power plant (SCPP) is a modernistic and promising technology, which utilizes the combination of solar heating and chimney effect for producing electricity. Solar collector, updraft tower and air turbine are the main components of a solar chimney unit, however, the turbine plays a royal role because it converts the kinetic energy of the heating air into useful mechanical energy. In this study, I measured the power, flow rate, rotational speed and pressure drop of the designed and industrial turbines within the wind tunnel, and the power coefficient of the turbines are calculated by measured values. The turbine was designed according to the blade element theory modified to consider the surrounding duct. we measured the electric power, flow rate and pressure drop of the turbine, and the power coefficient of the turbine is calculated by measured values. Testing of the designed and industrial turbine within wind tunnel shows that the highest power coefficient of the designed turbine is 0.45, while the highest power coefficient of the industrial turbine is 0.32. The designed turbine produces 28.89% higher than the industrial one.
太阳能烟囱电厂是一种利用太阳能加热和烟囱效应相结合的发电技术,是一种具有现代发展前景的发电技术。太阳能集热器、上升气流塔和空气涡轮机是太阳能烟囱装置的主要组成部分,其中,涡轮机起着至关重要的作用,因为它将加热空气的动能转化为有用的机械能。在本研究中,我在风洞内测量了设计涡轮和工业涡轮的功率、流量、转速和压降,并根据测量值计算了涡轮的功率系数。在考虑周围风道的基础上,对叶片单元理论进行了改进。测量了水轮机的电功率、流量和压降,并根据测量值计算水轮机的功率系数。在风洞内对设计型和工业型水轮机进行试验,结果表明,设计型水轮机的最高功率系数为0.45,工业型水轮机的最高功率系数为0.32。设计的汽轮机产出率比工业汽轮机高出28.89%。
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引用次数: 0
Utilizing machine learning techniques to process customer claims automatically 利用机器学习技术自动处理客户索赔
Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.36.15
S. Sader
In this paper, Supervised Machine Learning was used to develop a new approach to handle customers’ claims which were gathered from a real-case company. Supervised machine learning was used with accurate data in order to develop a machine learning model. This model was deployed and used to evaluate new un-evaluated claims by examining their content variables and assigning a ranking value for each claim expressing its priority. The goal of this experiment was to show evidence on the ability of new technologies such as Machine Learning to automate quality management traditional activities, improve efficiency and effectiveness, and support a new approach to “Quality 4.0”. Other goals were to improve customer satisfaction by enhancing responsiveness to their claims and to convince the company (the real case of this study) to extend the project for further applications.
在本文中,监督机器学习被用于开发一种新的方法来处理从真实案例公司收集的客户索赔。监督式机器学习与准确的数据一起使用,以开发机器学习模型。该模型被部署并用于评估新的未评估的索赔,方法是检查它们的内容变量,并为每个索赔分配一个表示其优先级的排序值。该实验的目的是证明机器学习等新技术能够自动化质量管理传统活动,提高效率和有效性,并支持实现“质量4.0”的新方法。其他目标是通过增强对客户要求的响应来提高客户满意度,并说服公司(本研究的真实案例)将项目扩展为进一步的应用程序。
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引用次数: 0
Detection of the efficiency of enzymatic hydrolysis and fermentation processes by dielectric measurement 电介质法测定酶解和发酵过程的效率
Pub Date : 1900-01-01 DOI: 10.17676/hae.2020.37.21
S. Beszédes, Z. Jákói, Balázs Lemmer, I. Czupy, C. Hodúr
: In our work the efficiency of enzymatic degradation of cellulosic biomass was investigated by conventional analytical methods and dielectric measurements. Our results show, that the dielectric measurements proved to be efficient and rapid method to detect the chemical and physicochemical change of biomass during the enzymatic hydrolysis of cellulose. Because of molecular weight decreasing, and the increasing of the concentration of polar and ionic components, the polarization ability of the system has been changed, what manifested in the change of dielectric parameters. Furthermore, dielectric measurements were suitable to detect the efficiency of biomass pre-treatment, as well.
在我们的工作中,通过传统的分析方法和电介质测量来研究纤维素生物质的酶降解效率。结果表明,电介质测量是检测纤维素酶解过程中生物质化学和物理化学变化的一种高效、快速的方法。由于分子量的减小,极性组分和离子组分浓度的增加,改变了体系的极化能力,表现为介电参数的变化。此外,电介质测量也适用于检测生物质预处理的效率。
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引用次数: 2
Technical and Technological Parameters of ISOBUS System Supported Machinery Management ISOBUS系统支持的机械管理技术参数
Pub Date : 1900-01-01 DOI: 10.17676/hae.2019.35.34
L. Magó, I. Kovacs
ISO organization in early 90s defined an industry standard for the communication protocol among electronic devices of different manufacturers of agricultural machines. After that, all of the market actors recognised that this technology would be very important for agricultural electronics. The appearance of ISOBUS products in the market was in the mid-2000s. ISOBUS description could be found in ISO-11783. It is a very complex and large electronics protocol standard based on CAN and SAE-J1939 standards, extended for the Agricultural Industry. The standard consists of 14 different parts and more than thousands of specification pages. Through the standards and the related technical background, the production processes and the operations could be followed and monitored by the extensive Data Management. Farmers' and users legitimate needs and developing goal is to elaborate a decision support systems that follow-up the utilisation of the machines and ensure the quality of operations. For this purpose, it is essential to determine which technical, economical, technological parameters, detection, measurement, transmission, processing, and evaluation becomes necessary. In our work, we reviewed which mechanical characteristics, settings are monitored within the ISOBUS system by the major machine manufacturers. We developed the system of parameters and derived features that provide effective farm-, and land-management in case of attached equipment for spreading of input materials and tillage implements.
ISO组织在90年代初为不同农业机械制造商的电子设备之间的通信协议定义了一个行业标准。在那之后,所有的市场参与者都认识到这项技术对农业电子产品非常重要。ISOBUS产品在市场上的出现是在2000年代中期。ISOBUS的描述可以在ISO-11783中找到。它是一个非常复杂的大型电子协议标准,基于CAN和SAE-J1939标准,为农业工业扩展。该标准由14个不同的部分和数千多个规范页组成。通过标准和相关的技术背景,广泛的数据管理可以跟踪和监控生产过程和操作。农民和用户的合法需求和发展目标是制定一个决策支持系统,跟踪机器的使用并确保操作质量。为此,必须确定哪些技术、经济、工艺参数、检测、测量、传输、处理和评价是必要的。在我们的工作中,我们回顾了主要机器制造商在ISOBUS系统中监控的机械特性和设置。我们开发了参数和衍生特征系统,在附加设备用于传播投入材料和耕作工具的情况下,提供有效的农场和土地管理。
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引用次数: 1
Application of Two Techniques Used for Measuring the Soil Strength : A Review 两种土壤强度测量技术的应用综述
Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.39.29
N. D. Salman, P. Kiss
This paper reviews the application of two techniques are used for the measurement of soil strength. The two techniques (cone penetrometer and bevameter) enable measurements to be made in situ. However, the penetrometer is the only equipment that can evaluate soil resistance variation with depth. Neither the cone index nor the gradient that belongs to it concerning the depth is uniquely associated with density or soil cohesion but varies with structural state and moisture content. Moreover, the formation of compaction zones and soil bodies ahead of the cone efficiently alters its geometry, thus the penetration no longer reveals the original characteristics of the soil. Furthermore, the bevameter technique only identifies surface soil properties. Nonetheless, among all the presently available techniques, the bevameter gives the closest imitation of vehicle-terrain interaction.
本文综述了两种技术在土强度测量中的应用。这两种技术(锥贯仪和井径仪)可以在现场进行测量。然而,贯入仪是唯一可以评估土壤阻力随深度变化的设备。锥指数和属于锥指数的深度梯度与密度和土壤黏聚力没有唯一的关系,而是随结构状态和含水量的变化而变化。此外,锥体前方的压实带和土体的形成有效地改变了锥体的几何形状,因此穿透不再显示土壤的原始特征。此外,测厚仪技术只能识别表层土壤性质。尽管如此,在目前所有可用的技术中,测深仪提供了最接近车辆-地形相互作用的模拟。
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引用次数: 0
The main influencing factors of mobile banking adoption in the open innovation business environment (Case study) 开放式创新商业环境下手机银行采用的主要影响因素(案例分析)
Pub Date : 1900-01-01 DOI: 10.17676/hae.2021.40.28
Thabit Atobishi, Miriam Bahna, C. Fogarassy
Mobile banking is a mobile commerce application that is revolutionizing financial services. Accepting and using a virtual system is not easy for users, either technologically or emotionally. The purpose of this research is to find out the effects of "Effect of Risk Perception", "Perceived Ease of Use" and "Perceived Usefulness of Mobile Banking" on mobile banking attitude and adoption. For this study, data was collected in 2019 from N=220 participants using 19 items of five Likert-type questionnaires. The data was analyzed using Statistical Package for Social Sciences and Regression Analysis through the enter method was used. It was found out that there is a positive significant effect of perceived ease of use and perceived usefulness of mobile banking on mobile banking attitude. The results also showed, that attitude towards switching to mobile banking has a positive significant effect on the intentions of mobile banking adoption. It can be concluded that the perceived ease of use of mobile banking will have a significant impact on attitudes towards switching to mobile banking services. The results of the research show that the perceived risk has a significant effect on the mobile. Also, for the ractitioners it is very important to take into consideration these results to promote the usage of mobile banking among the customers in Jordan. Our research results also show similarities and differences from previous research results, confirming the unique characteristics of the rapidly developing Arab region. User behavior related to mobile banking is shaped by the combined effect of custom and culture. Mobile banking services may be a very efficient and cost-effective tool in the future, accelerating industry development processes.
移动银行是一种移动商务应用程序,正在彻底改变金融服务。无论是技术上还是情感上,接受和使用虚拟系统对用户来说都不是一件容易的事。本研究的目的是找出“风险感知效应”、“感知易用性”和“感知手机银行有用性”对手机银行态度和采用的影响。在这项研究中,数据是在2019年从N=220名参与者中收集的,使用了5份李克特型问卷中的19个项目。数据分析采用Statistical Package for Social Sciences,回归分析采用进入法。研究发现,手机银行的感知易用性和感知有用性对手机银行态度有显著的正向影响。结果还表明,转向手机银行的态度对采用手机银行的意图有显著的正向影响。可以得出的结论是,手机银行的易用性将对转向手机银行服务的态度产生重大影响。研究结果表明,感知风险对手机有显著影响。此外,对于从业者来说,考虑到这些结果来促进约旦客户使用手机银行是非常重要的。我们的研究结果也显示出与以往研究结果的异同,印证了快速发展的阿拉伯地区的独特性。与手机银行相关的用户行为受到习俗和文化的综合影响。手机银行服务在未来可能是一种非常高效和具有成本效益的工具,加速行业发展进程。
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引用次数: 0
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Hungarian Agricultural Engineering
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