MATEC Web of Conferences最新文献_第6页

Flow control in paper-based microfluidic channel by using hydrophobic tape barrier on the paper surface 用纸表面疏水带屏障控制纸基微流控通道的流动

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338101009

Mubashar Ali, Ali Turab Jafry, Hamza Abbas, Hammas Ullah

{"title":"Flow control in paper-based microfluidic channel by using hydrophobic tape barrier on the paper surface","authors":"Mubashar Ali, Ali Turab Jafry, Hamza Abbas, Hammas Ullah","doi":"10.1051/matecconf/202338101009","DOIUrl":"https://doi.org/10.1051/matecconf/202338101009","url":null,"abstract":"Paper-based microfluidics offers a simple, cost-effective, and versatile platform for fluid manipulation and analysis. Despite significant advancements in paper fluidics, the flow control in paper channel remains a challenging task. In this regard, we have developed a flow delay channel in paper using rectangular tape patterns on the paper surface. We have investigated the effect of hydrophobic tape barriers with varying widths. The designing and cutting of the hydrophobic tape and paper channel was performed by CO2 laser machine using CorelDraw software. Once cut, the tape barriers were attached to the paper surface and then passed through the roller press machine for proper adhesion of tape pattern onto the paper’s surface. From experiments, we observed that by increasing the width of tape, the delay also increased. The hydrophobic tape on the paper surface caused resistance to the flowing fluid. Due to this surface resistance, flow velocity reduced, and the time delay increased. We believe that our novel approach will provide an alternative method of flow control for paper-based microfluidic devices and can be utilized in various food quality sensors and lateral flow devices.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"56 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83412655","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

Kinematics analysis of a medication delivery robot based on a 3-DOF manipulator 基于三自由度机械手的给药机器人运动学分析

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338201011

S. Huang

引用次数: 0

Research Progress of High Entropy Materials as Water Electrolysis Catalysts in Recent Years 高熵材料作为水电解催化剂的研究进展

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338201019

B. Wu

{"title":"Research Progress of High Entropy Materials as Water Electrolysis Catalysts in Recent Years","authors":"B. Wu","doi":"10.1051/matecconf/202338201019","DOIUrl":"https://doi.org/10.1051/matecconf/202338201019","url":null,"abstract":"Hydrogen energy has drawn considerable attention in recent years, among which the efficient production of hydrogen energy from water electrolysis has become a hot research topic in this field. The oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in water electrolysis are the core of the catalytic efficiency. High entropy materials have excellent combinatorial properties due to their \"cocktail effect\", high entropy effect, slow diffusion effect, and lattice distortion effect. They have outstanding catalytic effect in the process of water electrolysis, and thus become a hot research topic in recent years. This review combines the two hot topics by introducing the up-to-date research progress of high entropy materials in catalyzing water electrolysis. First, evaluation indexes of electrocatalytic performance are explained. Second, this review demonstrates specific materials from the classification of high entropy alloys, high entropy oxides and nitrided high entropy materials, which includes the structure of the materials and their specific catalytic performance. Finally, it summarizes the research progress of high entropy materials in water electrolysis catalysis as well as gives an outlook on the future design direction of the materials.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"70 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77821194","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

Performance Enhancement of VAWT using Diffuser for Energy Extraction from Cooling Tower Exhaust Air 利用扩散器从冷却塔排风中提取能量提高VAWT的性能

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337701022

E. Singh, Sukanta Roy, Y. San, Law Ming Chiat

{"title":"Performance Enhancement of VAWT using Diffuser for Energy Extraction from Cooling Tower Exhaust Air","authors":"E. Singh, Sukanta Roy, Y. San, Law Ming Chiat","doi":"10.1051/matecconf/202337701022","DOIUrl":"https://doi.org/10.1051/matecconf/202337701022","url":null,"abstract":"Renewable energy generation need to be accelerated to battle climate change and depletion of fossil fuel resources. Innovation to design wind recovery system which are efficient is vital to contribute green energy production. Many advancements in vertical axis wind turbines (VAWT) were made over the years however, it is still not as efficient as conventional turbines, and some countries does not have the luxury of strong consistent wind throughout the year. Therefore, this study focuses on extracting wind energy from unnatural sources, specifically for cooling tower exhaust air energy recovery. In this study, cycloidal diffuser with different shroud lengths was used to study the performance of a 3-bladed H-Darrieus VAWT (HDWT) with S-1046 airfoils under accelerated wind conditions in a 3-dimensional numerical study using shear stress transport k-ω turbulence model. The cycloidal diffuser with shroud length of 0.48D increased the HDWT power coefficient by 26.66% compared to the bare HDWT at tip speed ratio of 2.0. Aerodynamics around the energy extractor system was also discussed and this investigation has provided good understanding of the flow behaviour of the wind augmented HDWT under cooling tower exhaust air.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89844473","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

Comparative experiments on a new CaCl2-based composite material and zeolite 13X inside a thermochemical heat storage reactor 在热化学储热反应器内对一种新型cacl2基复合材料与沸石13X进行了对比实验

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337904004

Élise Bérut, J. Outin, M. Ondarts, Hugo Lange, Nolwenn Le Pierrès

引用次数: 0

Efficiency Improvement in Sugar Mills; The Role of High-Pressure Boiler Technology in Cogeneration 糖厂生产效率的提高;高压锅炉技术在热电联产中的作用

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338101001

Muhammad Umer, Inaam Ullah Mesum, Abdullah Hashim Zahid

{"title":"Efficiency Improvement in Sugar Mills; The Role of High-Pressure Boiler Technology in Cogeneration","authors":"Muhammad Umer, Inaam Ullah Mesum, Abdullah Hashim Zahid","doi":"10.1051/matecconf/202338101001","DOIUrl":"https://doi.org/10.1051/matecconf/202338101001","url":null,"abstract":"Pakistan’s electricity shortage has had a significant impact on its economic growth, people’s livelihoods, and industrial operations. Currently, thermal methods like oil and gas satisfy around 67% of its electricity needs, with hydropower generating 30% and nuclear means generating only 3%. Bagasse, a solid waste produced during sugar production, accounts for only 0.9% of Pakistan’s energy production. However, by implementing co-generation retrofits, bagasse’s capacity can increase up to 3000 MW. Sugarcane is a significant crop in Pakistan, and sugarcane crushing mills have been utilizing boiler technology for many decades as a means of generating steam and producing electricity. The process of cogeneration, which uses bagasse to generate steam and produce electricity, has several advantages, including reducing reliance on fossil fuels, providing a reliable source of electricity, and a source of revenue for sugarcane mills. High-pressure boilers have several advantages, including higher energy efficiency, higher electricity generation, less wear and tear on equipment, lower installation and maintenance costs, and a smaller footprint. As most sugar mills are in rural areas so we can also use this as a benefit and & provide electricity to remote areas. A case study related to JDW Sugar mill has been added at the end to compare the results of High- and Low-pressure boilers. From the results, it is clear that if we want to have highly efficient Cogeneration scheme in Sugar mills, we need to shift urgently towards High pressure boilers.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86245711","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

Carbon Dioxide Capture with Choline-Based DESs Solvents 以胆碱为基础的DESs溶剂捕集二氧化碳

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337907006

Gabriela Ciriaco, A. Ledoux, L. Estel

引用次数: 0

A comparison study between different kernel functions in the least square support vector regression model for penicillin fermentation process 青霉素发酵过程最小二乘支持向量回归模型中不同核函数的比较研究

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337701025

J. Malang, Wan sieng Yeo, Zhen Yang Chua, J. Nandong, A. Saptoro

{"title":"A comparison study between different kernel functions in the least square support vector regression model for penicillin fermentation process","authors":"J. Malang, Wan sieng Yeo, Zhen Yang Chua, J. Nandong, A. Saptoro","doi":"10.1051/matecconf/202337701025","DOIUrl":"https://doi.org/10.1051/matecconf/202337701025","url":null,"abstract":"Soft sensors are becoming increasingly important in our world today as tools for inferring difficult-to-measure process variables to achieve good operational performance and economic benefits. Recent advancement in machine learning provides an opportunity to integrate machine learning models for soft sensing applications, such as Least Square Support Vector Regression (LSSVR) which copes well with nonlinear process data. However, the LSSVR model usually uses the radial basis function (RBF) kernel function for prediction, which has demonstrated its usefulness in numerous applications. Thus, this study extends the use of non-conventional kernel functions in the LSSVR model with a comparative study against widely used partial least square (PLS) and principal component regression (PCR) models, measured with root mean square error (RMSE), mean absolute error (MAE) and error of approximation (Ea) as the performance benchmark. Based on the empirical result from the case study of the penicillin fermentation process, the Ea of the multiquadric kernel (MQ) is lowered by 63.44% as compared to the RBF kernel for the prediction of penicillin concentration. Hence, the MQ kernel LSSVR has outperformed the RBF kernel LSSVR. The study serves as empirical evidence of LSSVR performance as a machine learning model in soft sensing applications and as reference material for further development of non-conventional kernels in LSSVR-based models because many other functions can be used as well in the hope to increase the prediction accuracy.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79194157","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

Simultaneous Determination of nicotinamide, kojic acid, Tranexamic acid, raspberry glycoside, azelaic acid, magnesium ascorbate phosphate and β-Arbutin in whitening cosmetics by UPLC-MS/MS UPLC-MS/MS同时测定美白化妆品中烟酰胺、曲酸、氨甲环酸、覆盆子苷、壬二酸、磷酸抗坏血酸镁和β-熊果苷的含量

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202338001005

Xiao Zou, Lixiu Yan, Xiaofang Luo, Enting Wang, Mingjuan Zhang, Wuping Huang, Wulin Li, L. Tong

{"title":"Simultaneous Determination of nicotinamide, kojic acid, Tranexamic acid, raspberry glycoside, azelaic acid, magnesium ascorbate phosphate and β-Arbutin in whitening cosmetics by UPLC-MS/MS","authors":"Xiao Zou, Lixiu Yan, Xiaofang Luo, Enting Wang, Mingjuan Zhang, Wuping Huang, Wulin Li, L. Tong","doi":"10.1051/matecconf/202338001005","DOIUrl":"https://doi.org/10.1051/matecconf/202338001005","url":null,"abstract":"A UPLC-MS/MS method was developed for simultaneous determination of 7 whitening ingredients: nicotinamide, kojic acid, Tranexamic acid, raspberry glycoside, azelaic acid, magnesium ascorbate phosphate and β-Arbutin in cosmetics. The whitening active components were extracted from cosmetics by supersonic extraction with sodium chloride and dichloromethane to disperse the sample, and supersonic extraction with 0.015 mol/L potassium dihydrogen phosphate solution purified by HLB solid phase extraction column, scanned and detected by electrospray ionization source with positive and negative ion alternate scanning mode and multiple reaction monitoring mode. The results showed that the whitening active ingredients were separated within 3 minutes, with a good linear relationship (R>0.999), and the detection limit was 0.10mg/kg~0.75mg/kg. The recoveries (n=6) were 78.84%-104.85%, and the RSDs were 0.24%-11.35%. This method is suitable for the rapid determination of whitening active ingredients in cosmetics.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81282435","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

Self-Waterproofing Performance of Repair Mortars With Inorganic Healing Agents 无机愈合剂修补砂浆的自防水性能

MATEC Web of Conferences Pub Date : 2023-01-01 DOI: 10.1051/matecconf/202337803001

Padmapriya Arul Kumar, S. Rengaraju, A. Al-Tabbaa

{"title":"Self-Waterproofing Performance of Repair Mortars With Inorganic Healing Agents","authors":"Padmapriya Arul Kumar, S. Rengaraju, A. Al-Tabbaa","doi":"10.1051/matecconf/202337803001","DOIUrl":"https://doi.org/10.1051/matecconf/202337803001","url":null,"abstract":"In Europe, about 55% of concrete bridges are about 50 years old and require non-structural rapid repair strategies to reinstate the aesthetic and durability performances. Existing strategies focus primarily on superficial restoration that continues to demonstrate premature deterioration due to inevitable micro-crack formations that further propagate to macro-cracks leading to the ingress of moisture along with harmful ions. In this study, the benefits of self-healing technology to control moisture ingress at the microscale were investigated. For this, tailored microcapsule with inorganic healing agent, specifically, commercially available water-repellent agent (SIKAGARD 705L) was added to mortar with two types of commonly used binders namely CEMI 52.5N and CEMI 52.5R. The compatibility assessment in terms of capsule integration, fresh and hardened properties was done. The baseline healing efficiency of the mortars without any healing additions was obtained to understand the autogenous healing capacity of the reference mortars. Subsequently, the reference mortar mixes were compared with mixes containing varying fractions of microcapsules (3, 5, and 10%) for autonomous healing efficiency with capillary absorption as the main durability function. The healing efficiency was further investigated for two different crack mouth widths (<250 μm and >350 μm); representative of non-structural residual crack widths. In mortars with microcapsules, a maximum reduction of sorptivity coefficients up to 82% and 78% with CEMI 52.5N and CEMI 52.5R mortars, respectively, for specimens cracked after 7 days of curing was observed. Subsequently, a synergetic effect of autogenous healing action and autonomous water-repellent action for durability recovery was identified and proved useful for repair mortar applications. The healing agent investigated, capsule content, and healing environment considered in the current study lay a foundation for further optimisation to improve the performance and to suit different applications.","PeriodicalId":18309,"journal":{"name":"MATEC Web of Conferences","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83503348","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