EngRN: Engineering Design Process (Topic)最新文献

{"title":"A New Modeling Approach of Mixing Quality and Axial Hold-up Distribution in Agitated Liquid-Liquid Flow Mixers for Enabling Process Intensification","authors":"K. H. Abid, James C. Godfreya, M. Slater, M. Al-Dahhan, Binbin Qi","doi":"10.2139/ssrn.3610710","DOIUrl":"https://doi.org/10.2139/ssrn.3610710","url":null,"abstract":"Liquid-liquid mixing, extraction, reaction, separation, and beneficiation have found a wide range of industrial applications. New theoretical based models have been developed and validated to enable process intensification by properly predicting the mixing quality and the local dispersed phase hold-up distributions in the axial direction of a continuous liquid-liquid flow mixer. The models relate the mixing index and axial hold-up distributions to a Peclet Number, the average dispersed phase hold-up, the input flow rates and the physical properties of the dispersion. The developed models offer a new understanding of the nature of the mixing process in continuous mixers with two liquid-liquid immiscible phases in flow. Experimental work was also performed to investigate the mixing index and axial dispersed phase hold-up distribution using Laser Transmission Technique (LTT) in a mixer setup. The experimental results were used in validating the models. The experimental and the predicted data agreed well for a wide range of impeller speeds/flow ratios.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84466122","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}

{"title":"Design and Implementation a New Approach for Enhancing Encryption and Decryption Mechanisms","authors":"F. Rashid","doi":"10.2139/ssrn.3590807","DOIUrl":"https://doi.org/10.2139/ssrn.3590807","url":null,"abstract":"In cryptography, encryption is the process of transforming information to make it unreadable to anyone except those possessing special knowledge, usually referred to as a key. The result of the process is encrypted information. This research is intended to introduce a new approach for encryption is the design and implement Kurdish and English languages cipher system. It uses Kurdish letters and their diacritics for encrypting English messages and vice versa. A pseudo random generator is used to generate integer numbers to represent each character in Kurdish language. The same numbers are used again after sorting them to represent the English characters. The conclusions that are extracted indicate the efficiency of KAELCS system according to security and time performance.<br>","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84890883","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}

{"title":"Impact Energy Harvesting by Fe-Co Fiber Reinforced Al-Si Matrix Composite","authors":"Manabu Seino, Lixin Jiang, Zhenjun Yang, K. Katabira, T. Satake, F. Narita, G. Murasawa","doi":"10.1016/j.mtla.2020.100644","DOIUrl":"https://doi.org/10.1016/j.mtla.2020.100644","url":null,"abstract":"","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74451944","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}

{"title":"Development of Methods for Identification of Information Controlling Signals of Unmanned Aircraft Complex Operator","authors":"O. Yudin, R. Ziubina, S. Buchyk, O. Matviichuk-Yudina, Olha Suprun, V. Ivannikova","doi":"10.15587/1729-4061.2020.195510","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.195510","url":null,"abstract":"Methods for verifying and identifying the operator by the features of the formation of biometric features of a speech signal in control systems of unmanned aerial systems are proposed. A method has been developed for the effective width of the spectrum of a speech signal, which allows identification and verification of the operator of an unmanned aerial vehicle based on an analysis of the informative components of voice prints under conditions of a high level of interference of various origins. A method has been developed for the highest informational weight of the fundamental tone, which is based on the use of the most informative components of the spectral representation of the prints of a speech signal. The first method allows to identify the operator of an unmanned aerial vehicle by the informative components of the spectral representation of the fingerprint of a speech signal under conditions of a high level of interference. High indicators, which are achieved by using this method, are obtained due to the uniqueness of the selected feature space, which retain their characteristics even with a fairly high level of interference. The second method provides speaker identification of an unmanned aerial vehicle by a specific space of unique voice features. The frequencies of the fundamental tone and overtones were chosen as the basic features. Such an approach to solving the identification problem provides a high probability of determining the operator with the existing rather high level of interference and reduces the processing time of information in comparison with the effective spectrum width method. The creation of control methods and models for unmanned aerial systems provides an increase in the level of noise immunity and safety of control systems from interventions by an unauthorized operator. Using operator identification methods allows to create a system for restricting access to the aircraft control process and thereby ensure the continuity of the operation of the information management system for unmanned aerial systems","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"55 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88468001","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}

{"title":"Development and Research of a Label Caseine Adhesive for Packaging the Industrial and Household Products","authors":"A. Cherkashina, A. Rassokha, I. Ryshchenko, O. Komarova","doi":"10.15587/1729-4061.2020.201689","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.201689","url":null,"abstract":"A new composition of the environmentally friendly water-based casein adhesive glue with the increased adhesion to the substrate (glass, polyethylene terephthalate, etc.) and the improved water resistance has been developed and explored. The glue is easily washed away when labeling products that are packaged in reusable containers, but, at the same time, possesses high adhesion to different surfaces. The optimal formulation for the developed glue adhesive composition based on casein has been determined with the help of the investigated properties. The effect of the amount of a modifying additive on the dynamic viscosity at different deformation rates, the stickiness of the adhesive composition, and the hydrogen ions index (pH) has been studied. Such technological properties of the glue adhesive composition were investigated as viscosity – 170 Pa∙s; pH – 7.21; the mass share of dry residue – 38.2 %; stickiness – 58.17 a.u.; working temperature – +20…+25 °С. The optimal technological parameters for using the glue have been defined: optimal viscosity, from 130 Pa∙s to 170 Pa∙s; temperature, 25 °C, and 35 °C, respectively. The adhesive strength between a paper label and glass is 4 points, polyethylene terephthalate – 3 points. The operation properties were assessed based on the resistance of the glue adhesive composition against changes in temperature and environmental conditions, humidity, and mechanical impact. The requirements for the glue adhesive have been stated that are to be taken into consideration in its operation: resistance against the condensed and icy water and the ability of the label to be removed from the surface of the container in a washing machine at a temperature of 70–80 °C. The glue adhesive composition was examined by a SAB Miller method to assess its quality during an ice water resistance test. A copy paper method was used to assess the label gluing quality. The requirements for the glue adhesive have been defined, which should be taken into consideration in its operation (the resistance against the condensed and icy water and the removal of a label in a washing machine at a temperature of 70–80 °C with the addition of NaOH or surface-active substances)","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76354435","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}

{"title":"Thermotechnical Properties of the Fire-Extinguishing Powder for Extinguishing Materials Based on Magnesium Alloy Chips","authors":"B. Gusar, V. Kovalyshyn, S. Pozdieiev, V. Kovalyshyn, O. Zemlianskyi, K. Myhalenko","doi":"10.15587/1729-4061.2020.201748","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.201748","url":null,"abstract":"The article addresses the relevant issue of determining the thermotechnical characteristics of the fire-extinguishing powder for thermal insulation of the fire center of materials based on magnesium alloy chips to prevent fire development and propagation and its effective extinguishing. To solve this problem, laboratory and field experimental studies of the heat-insulating ability of the fire-extinguishing powder of combined effect were conducted. As a result, we obtained the data on the temperature in the center of the fire of materials based on magnesium alloy chips and outside during their suppressing by the fire-extinguishing powder with a combined effect. In this case, the temperature of the non-heated side of the fire-extinguishing powder layer does not exceed 170 °C at the average temperature of the fire center of 740 °C, which indicates high insulation capacity of the powder and, consequently, its high fire-fighting efficiency in extinguishing the fires of materials based on magnesium alloy chips. The obtained temperature data were used to determine the thermophysical parameters of the layer of the fire-fighting powder using the created mathematical model of the heat transfer process in the powder layer at the heat insulation of the fire center. To create a mathematical model of the heat transfer process, the main provisions during consecutive consideration of several experimental situations were stated. The first experimental situation meets the conditions of the stationary thermal process, and other experimental situations meet the conditions of the non-stationary thermal process. These experimental situations were created with the help of changing the thickness of the fire-fighting powder layer at different parameters of its feeding to the fire center. The mathematical model of the process is based on the use of the differential equation of heat transfer at its approximation by the method of finite differences. At the same time, it is believed that the heat transfer conditions at the boundary between the non-heated side of the insulating layer of the fire-extinguishing powder and the environment in each experimental situation are the same. Using the created model, the coefficient of heat transfer between the non-heated side of the insulating layer of the fire-extinguishing powder and the environment was determined. It amounted to 395.7 W(m 2 ×°С). The dependence of the effective thermal conductivity coefficient on the thickness of the insulating layer was explored. It was shown that this dependence can be approximated by linear dependence l(d)=–0.016+93.907×d (d is the thickness of the layer of the fire-extinguishing powder in meters). After conducting the necessary calculations, we obtained the value of the required thickness of the layer of fire-extinguishing powder d=45.2 mm","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81567155","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}

{"title":"Enhanced Age-Hardening by Synergistic Strengthening from Mg-Si and Mg-Zn Precipitates in Al-Mg-Si Alloy with Zn Addition","authors":"Wenchao Yang, Weiwei Shen, Kaili Cao, Jun Zhang, Lin Liu","doi":"10.2139/ssrn.3580451","DOIUrl":"https://doi.org/10.2139/ssrn.3580451","url":null,"abstract":"The accelerated age-hardening response and the enhanced peak-hardness in Al-Mg-Si with Zn addition was investigated by three-dimensional atom probe and transmission electron microscopy. The results showed that Zn addition significantly increased the number density of solute aggregates by stimulating the formation of more Mg-Si precipitates and resulted in a higher Mg/Si ratio because of the formation of Mg-Zn precipitates. A synergistic strengthening from Mg-Si and Mg-Zn-(Si) solute aggregates was estimated to accelerate the age-hardening response at the early aging stage, and that from β\" phases for Mg2Si system and Guinier-Preston (GP) I zones/η′ phases for MgZn2 system enhanced the peak-harness.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"15 12 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86985080","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}

{"title":"A Study of the Structural, Morphological and Luminescence Characteristics of Polyvinyl Pyrrolidone and Chitosan Capped Calcium Sulfide Nanoparticles","authors":"R. S","doi":"10.2139/ssrn.3611862","DOIUrl":"https://doi.org/10.2139/ssrn.3611862","url":null,"abstract":"Semiconductor nanoparticles have gained impressive attention due to their novel optical and electronic properties. Here we report the synthesis of calcium sulfide (CaS) nanophosphors through a simple wet chemical co-precipitation method using two different capping agents polyvinyl pyrrolidone (PVP) and chitosan. The role of capping agents in determining the particle size, morphology and luminescence of CaS nanoparticles was determined using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), room temperature Photoluminescence (PL), UV-Vis spectroscopy and Fourier Transform Infrared (FTIR) spectroscopy. XRD studies confirmed that the nanoparticles were crystallized in cubic phase with space group 3 Fm m. PL emission spectra of the capped samples consisted of broad peaks in the range 350-500 nm with enhanced PL intensity compared to that of uncapped sample. An increase in bandgap was observed due to capping which may be attributed to size quantization effects. Capped nanoparticles showed better structural and optical properties compared to uncapped samples which can be exploited in various optoelectronic and biomedical applications.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86628200","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}

{"title":"Effect of the Tool Geometry on the Force Mode of the Combined Radial-Direct Extrusion With Compression","authors":"L. Aliieva, N. Hrudkina, I. Aliiev, I. Zhbankov, Oleg Markov","doi":"10.15587/1729-4061.2020.198433","DOIUrl":"https://doi.org/10.15587/1729-4061.2020.198433","url":null,"abstract":"A possibility has been investigated to use an energy method to calculate the energy-force parameters for the cold extrusion processes involving components of complex configuration. A mathematical model has been proposed for the process of combined sequential radial-direct extrusion with compression with the presence of triangular kinematic modules. The use of the triangular kinematic modules with curvilinear and straight-line boundaries has made it possible to describe the sites of intense deformation, which correspond to the steady stage of the deformation process. It has been proposed to apply an upper estimate of the power of forces that deform a kinematic module of the triangular shape of the transition zone from the radial flow of metal to direct extrusion. This has made it possible to derive the magnitude of the reduced deformation pressure in the analytical form as a function of the geometric and technological parameters of the extrusion process. The margin of error, compared to numerical calculations without the use of the upper estimate, does not exceed 0.2‒1 %. The role of an optimization parameter belongs to aI(0,1), which is responsible for the shape of the curvilinear boundary of the inner triangular kinematic module. We have derived an analytical expression for the optimal value of the α parameter and analyzed a change in the magnitude of the reduced deformation pressure at different ratios of the process geometric parameters. It has been established that the optimal values of the angle of inclination of the forming mandrel β lie between 20° and 30° for different ratios of the deformation process. It has been justified that the use of combined sequential extrusion in the manufacture of hollow components with a flange, when compared to the application of simple deformation schemes, improves the process technological possibilities. The lack of study of the schemes of the combined radial-direct extrusion process with the compression of components of the type of sleeve, as well as the lack of recommendations for calculating the energy force parameters of the process, have been confirmed. The calculation scheme of a given process, developed on the basis of an energy method, makes it possible to predict the force mode for the steady stage under different technological parameters of the deformation process. The data acquired on the estimation of the optimal parameters for tool configuration would help devise appropriate design and technology recommendations","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"248 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86708688","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}

{"title":"Automatic Temperature Based Fan Speed Controller Using Arduino","authors":"Shivani Mohite, Shivshankar Adsule, Rahul Patil, N. Dhawas","doi":"10.2139/ssrn.3645388","DOIUrl":"https://doi.org/10.2139/ssrn.3645388","url":null,"abstract":"The temperature-based fan speed control system can be done by using an electronic circuit using an Arduino board. Now Arduino board is very progressive among all electronic circuits, thus we employed the Arduino board for fan speed control. The proposed system is designed to detect the temperature of the room and send that information to the Arduino board. Then the Arduino board executes the contrast of current temperature and sets the temperature based on the inbuilt program of the Arduino.","PeriodicalId":11974,"journal":{"name":"EngRN: Engineering Design Process (Topic)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72780377","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}