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Research on Solidification Layer Detection in Coal Transportation Process Based on Improved YOLOv8 Algorithm 基于改进型 YOLOv8 算法的煤炭运输过程中凝固层检测研究
Processes Pub Date : 2024-06-13 DOI: 10.3390/pr12061211
Baokang Xiang, Ruihong Zhou, Kaifeng Huang, Litong Dou
{"title":"Research on Solidification Layer Detection in Coal Transportation Process Based on Improved YOLOv8 Algorithm","authors":"Baokang Xiang, Ruihong Zhou, Kaifeng Huang, Litong Dou","doi":"10.3390/pr12061211","DOIUrl":"https://doi.org/10.3390/pr12061211","url":null,"abstract":"Railway transportation is one of the main modes of long-distance coal transportation, and it inevitably causes environmental pollution during the transportation process. In order to improve the environment along the railway and increase the utilization rate of coal resources, this paper proposes a detection algorithm for the scattered coal solidification layer during transportation based on the YOLOv8 model and designs an intelligent recognition model suitable for coal solidification layer detection devices by combining fluorescence detection methods. Through experimental analysis, we found that the model meets the requirements of practical detection and can play a crucial role in environmental protection, with high practical application value.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"64 41","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346888","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
Hydrometallurgical Processing of a Low-Grade Sulfide Copper–Nickel Ore Containing Pt and Pd 含铂和钯的低品位硫化铜镍矿的湿法冶金加工
Processes Pub Date : 2024-06-13 DOI: 10.3390/pr12061213
E. Latyuk, A. Goryachev, V. Melamud, A. Bulaev
{"title":"Hydrometallurgical Processing of a Low-Grade Sulfide Copper–Nickel Ore Containing Pt and Pd","authors":"E. Latyuk, A. Goryachev, V. Melamud, A. Bulaev","doi":"10.3390/pr12061213","DOIUrl":"https://doi.org/10.3390/pr12061213","url":null,"abstract":"The goal of the present work was to study the recovery of copper, nickel, and platinum group metals (PGMs) (Pt and Pd) from low-grade copper–nickel ore containing pyrrhotite, pentlandite, and chalcopyrite by column bioleaching followed by cyanidation. The ore sample contained the following: Ni—0.74%, Cu—0.23%, Fe—14.8%, Stotal—8.1%, and Ssulfide—7.8%. The Pt and Pd contents in the ore sample were 0.2535 and 0.515 g/t, respectively. Biological leaching in columns was carried out at 25, 35, and 45 °C for 140 days. A mixed culture of acidophilic microorganisms was used as an inoculum. Cu and Ni extraction depended on temperature, and at 45 °C, copper and nickel recovery was the highest, being 2.1 and 1.8 times higher than that at 25 °C, respectively. As a result, up to 35% of nickel and up to 10% of copper were recovered by bioleaching within 140 days. Bioleaching resulted in an increase in Pt and Pd recovery by cyanidation, but the effect on Pd recovery was insignificant. Pt recovery varied in the range of 3–40% depending on process conditions; Pd recovery was 44–55%.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"61 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346807","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
An Experimental Analysis of Taguchi-Based Gray Relational Analysis, Weighted Gray Relational Analysis, and Data Envelopment Analysis Ranking Method Multi-Criteria Decision-Making Approaches to Multiple-Quality Characteristic Optimization in the CNC Drilling Process 基于田口灰度关系分析法、加权灰度关系分析法和数据包络分析排序法的实验分析 数控钻孔工艺中多质量特性优化的多标准决策方法
Processes Pub Date : 2024-06-13 DOI: 10.3390/pr12061212
Fitore Abdullahu, Fatlume Zhujani, G. Todorov, K. Kamberov
{"title":"An Experimental Analysis of Taguchi-Based Gray Relational Analysis, Weighted Gray Relational Analysis, and Data Envelopment Analysis Ranking Method Multi-Criteria Decision-Making Approaches to Multiple-Quality Characteristic Optimization in the CNC Drilling Process","authors":"Fitore Abdullahu, Fatlume Zhujani, G. Todorov, K. Kamberov","doi":"10.3390/pr12061212","DOIUrl":"https://doi.org/10.3390/pr12061212","url":null,"abstract":"The goal of this research is to optimize the input parameters utilized in dry CNC drilling of forging steel to attain sustainable machining. Particular emphasis will be placed on achieving high productivity while minimizing the impact on surface quality. To achieve the aforementioned goal, three Taguchi-based multi-criteria decision-making (MCDM) approaches, such as traditional gray relational analysis (GRA), weighted gray relational analysis (WGRA), and data envelopment analysis ranking (DEAR), were used for simultaneous optimization of the MRR and Ra. In Taguchi’s L12 (24) orthogonal array design, the cutting mode parameters—such as cutting speed, depth of cut, feed rate, and point angle—have been chosen as the input parameters for the modeling and analysis of the drilling process characteristics. The process of determining the effect of the input parameters on the output parameters was carried out with the use of analysis of variance (ANOVA). The best results from the studies were Ra = 2.19 and MRR = 375 mm3/s, which corresponded to Taguchi’s single optimization levels, S2F1D1A2 and S2F2D2A1, respectively. In the next step, the performance values obtained for each MCDM technique were reoptimized using the Taguchi method, and the optimal levels were obtained: for traditional GRA, the level S2F1D2A1 (Ra = 2.52 µm, MRR = 125 mm3/s); for WGRA, the level S2F1D1A1 (Ra = 2.31 µm, MRR = 83 mm3/s); and for DEAR, the level S2F2D2A1 (Ra = 4.42 µm, MRR = 375 mm3/s), respectively. Lastly, in order to compare the experiments’ performance, validation tests were carried out. The results of the experiments using multi-objective optimization show that traditional GRA improved the overall quality response characteristics by 29.86% compared to the initial setup parameters, while weighted GRA improved them by 34.48%, with the DEAR method providing an improvement of 96%. Based on the findings of this investigation, the DEAR optimization method outperforms the GRA method. As a result, the proposed methods are useful tools for multi-objective optimization of cutting parameters.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"9 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141349161","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
Characteristics and Mechanisms of CO2 Flooding with Varying Degrees of Miscibility in Reservoirs Composed of Low-Permeability Conglomerate Formations 由低渗透性砾岩地层组成的储层中不同混溶程度的二氧化碳充注特征与机理
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061203
Yun Luo, Shenglai Yang, Yiqi Zhang, Gen Kou, Shuai Zhao, Xiangshang Zhao, Xing Zhang, Hao Chen, Xiuyu Wang, Zhipeng Xiao, Lei Bai
{"title":"Characteristics and Mechanisms of CO2 Flooding with Varying Degrees of Miscibility in Reservoirs Composed of Low-Permeability Conglomerate Formations","authors":"Yun Luo, Shenglai Yang, Yiqi Zhang, Gen Kou, Shuai Zhao, Xiangshang Zhao, Xing Zhang, Hao Chen, Xiuyu Wang, Zhipeng Xiao, Lei Bai","doi":"10.3390/pr12061203","DOIUrl":"https://doi.org/10.3390/pr12061203","url":null,"abstract":"The reservoir type of the MH oil field in the Junggar Basin is a typical low-permeability conglomerate reservoir. The MH oilfield was developed by water injection in the early stage. Nowadays, the reservoir damage is serious, and water injection is difficult. There is an urgent need to carry out conversion injection flooding research to improve oil recovery. The use of CO2 oil-flooding technology can effectively supplement formation energy, reduce greenhouse gas emissions, and improve economic benefits. In order to clarify the feasibility of CO2 flooding to improve oil recovery in conglomerate reservoirs with low permeability, strong water sensitivity, and severe heterogeneity, this paper researched the impact of CO2 miscibility on production characteristics and mechanisms through multi-scale experiments. The aim was to determine the feasibility of using CO2 flooding to enhance oil recovery. This study initially elucidated the oil displacement characteristics of varying degrees of miscibility in different dimensions using slim tube experiments and long core experiments. Subsequently, mechanistic research was conducted, focusing on the produced oil components, changes in interfacial tension, and conditions for pore mobilization. The results indicate that the minimum miscibility pressure (MMP) of the block is 24 MPa. Under the slim tube scale, the increase in the degree of miscibility can effectively delay the gas breakthrough time; under the core scale, once the pressure reaches the near mixing phase, the drive state can transition from a non-mixed “closed-seal” to a “mixed-phase” state. Compared to the immiscible phase, the near-miscible and completely miscible phase can improve the final recovery efficiency by 9.27% and 18.72%. The component differences in the displacement products are mainly concentrated in the high-yield stage and gas breakthrough stage. During the high-yield stage, an increase in miscibility leads to a higher proportion of heavy components in the produced material. Conversely, in the gas breakthrough stage, extraction increases as the level of mixing increases, demonstrating the distinct extracting characteristics of different degrees of mixed phases. The core experiences significant variations in oil saturation mostly during the pre-gas stage. CO2 miscible flooding can effectively utilize crude oil in tiny and medium-sized pores during the middle stage of flooding, hence reducing the minimum threshold for pore utilization to 0.3 μm.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"28 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353630","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
Rice Bran Valorization through the Fabrication of Nanofibrous Membranes by Electrospinning 通过电纺丝制造纳米纤维膜实现米糠增值
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061204
María Alonso‐González, M. Felix, Alberto Romero
{"title":"Rice Bran Valorization through the Fabrication of Nanofibrous Membranes by Electrospinning","authors":"María Alonso‐González, M. Felix, Alberto Romero","doi":"10.3390/pr12061204","DOIUrl":"https://doi.org/10.3390/pr12061204","url":null,"abstract":"The high production rate of fossil-based plastics, coupled with their accumulation and low degradability, is causing severe environmental problems. As a result, there is a growing interest in the use of renewable and natural sources in the polymer industry. Specifically, rice bran is a highly abundant by-product of the agro-food industry, with variable amounts of protein and starch within its composition, which are usually employed for bioplastic development. This study aims to valorize rice bran through the production of nanofiber membranes processed via electrospinning. Due to its low solubility, the co-electrospinning processing of rice bran with potato starch, known for its ability to form nanofibers through this technique, was chosen. Several fiber membranes were fabricated with modifications in solution conditions and electrospinning parameters to analyze their effects on the synthesized fiber morphology. This analysis involved obtaining micrographs of the fibers through scanning electron microscopy (SEM) and fiber diameter analysis. Potato starch membranes were initially investigated, and once optimal electrospinning conditions were identified, the co-electrospinning of rice bran and potato starch was conducted. Attempts were made to correlate the physical properties of the solutions, such as conductivity and density, with the characteristics of the resulting electrospun fibers. The results presented in this study demonstrate the potential valorization of a rice by-product for the development of bio-based nanofibrous membranes. This not only offers a solution to combat current plastic waste accumulation but also opens up a wide range of applications from filtration to biomedical devices (i.e., in tissue engineering).","PeriodicalId":506892,"journal":{"name":"Processes","volume":"73 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350389","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
BA-Optimized Variable Domain Fuzzy PID Control Algorithm for Water and Fertilizer Ratio Control System in Cotton Field 用于棉田水肥比控制系统的 BA 优化变域模糊 PID 控制算法
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061202
Zhenhua Guo, Fenglei Zhu, Peng Zhao, Huanmei Chen
{"title":"BA-Optimized Variable Domain Fuzzy PID Control Algorithm for Water and Fertilizer Ratio Control System in Cotton Field","authors":"Zhenhua Guo, Fenglei Zhu, Peng Zhao, Huanmei Chen","doi":"10.3390/pr12061202","DOIUrl":"https://doi.org/10.3390/pr12061202","url":null,"abstract":"Due to the time-varying, hysteresis and nonlinear characteristics of fertilizer concentration control in the water–fertilizer ratio control system, common control algorithms such as PID and fuzzy PID cannot obtain the expected control effect. In order to accurately control the cotton field water–fertilizer ratio regulation system drip irrigation process of the water–fertilizer ratio that will be controlled within a reasonable range, it is needed to design a bat-optimized variable-domain fuzzy PID water–fertilizer ratio control strategy, through the use of bat algorithm to find out the optimal expansion factor and the best domain of the current conditions, and then according to the changes in working conditions to automatically adjust the fuzzy control of the domain, through the control of the valve openings to change the fertilizer pump back to the amount of water. Realize the fast and precise control of fertilizer concentration in the water–fertilizer ratio control system. Comparative tests were conducted to verify the traditional PID, fuzzy PID, variable domain fuzzy PID and bat-optimized variable-domain fuzzy PID control algorithms. The results show that: if the water–fertilizer ratio is adjusted to 50:1 from the startup, the adjustment time required to reach the target water–fertilizer ratio under the bat-optimized variable-domain fuzzy PID control is 15.29 s, and the maximum overshooting amount is 16.28%, which is a smaller adjustment time and overshooting amount; if the water–fertilizer ratio is adjusted to 40:1 from 50:1, the advantages of bat-optimized variable-domain fuzzy PID are more obvious, with the best balance of response speed, overshooting amount and optimal control effect. In terms of response speed, overshooting amount and regulation time, the optimal balance is achieved, showing the optimal control effect. It is proved that the performance of the water–fertilizer ratio regulation system in cotton field under bat-optimized variable-domain fuzzy PID control designed in this paper can meet the actual production requirements, and these findings can help to develop precise irrigation technology for cotton cultivation under drip irrigation conditions.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"12 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141355065","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
Effects of Olive Oil and Tween 80 on Production of Lipase by Yarrowia Yeast Strains 橄榄油和吐温 80 对雅罗氏酵母菌株产生脂肪酶的影响
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061206
Gizella Sipiczki, Stefan Savo Micevic, Csilla Kohári-Farkas, Edina Szandra Nagy, Quang D. Nguyen, A. Gere, E. Bujna
{"title":"Effects of Olive Oil and Tween 80 on Production of Lipase by Yarrowia Yeast Strains","authors":"Gizella Sipiczki, Stefan Savo Micevic, Csilla Kohári-Farkas, Edina Szandra Nagy, Quang D. Nguyen, A. Gere, E. Bujna","doi":"10.3390/pr12061206","DOIUrl":"https://doi.org/10.3390/pr12061206","url":null,"abstract":"Lipase is one of the most commonly used biocatalysts in the food, pharmaceutical and cosmetic industries, and can be produced by Yarrowia lipolytica yeast. Despite the intensive studies of lipase from Yarrowia, there are still many open questions regarding the enzyme secretion process, especially by new isolates of this genus as well as the effect of substrates or surfactants, or both on the production of lipase. This research focused on the effect of olive oil and surfactant Tween 80 including the optimisation of the concentration of these compounds on the production of lipase by some novel Yarrowia isolates. Moreover, the optimal environmental parameters (pH, temperature) of crude enzyme synthetised by Yarrowia strains were determined. All investigated strains were able to produce lipase in both intracellular and extracellular fractions. The extracellular lipase activities were higher than the intracellular ones (Y. divulgata Y.02062 and Yarrowia lipolytica 854/4 147 U/L, 80 U/L and 474 U/L, 122 U/L, respectively). In the case of extracellular lipase, supplementing olive oil and Tween 80 enhanced significantly the synthesis and secretion of the enzyme. The lipase activity can even be enhanced by 20 times higher from 25 U/L to 474 U/L in the case of Yarrowia lipolytica 854/4 strain. In the case of intracellular, supplementation of Tween 80 generally reduces lipase activity except for the Y. lipolytica 1/4 strain, which was affected by two times the increase. The optimised concentration of olive oil and Tween 80 were determined for Y. divulgata Y.02062, Y. divulgata 5257, Y. lipolytica 1/4, and Yarrowia lipolytica 854/4 strains as 1.6% olive oil and 0.09% Tween 80, 1.6% olive oil and 0.06% Tween 80, 1.4% olive oil and 0.09% Tween 80 as well as 1.6% olive oil and 0.065% Tween 80, respectively. The optimum pH and temperature of crude lipases (intra and extracellular) synthetised by the tested Yarrowia lipolytica and Y. divulgata yeast strains were found to be pH 7.2 and 37 °C, respectively. Our results confirmed that the new isolate Y. divulgata is a very promising species for further development for industrial use as Y. lipolytica.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"4 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353939","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
Modeling of the Arc Characteristics inside a Thermal Laminar Plasma Torch with Different Gas Components 使用不同气体成分的热层压等离子体炬内电弧特性建模
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061207
Jing Tao, Changpeng Li, Xiuquan Cao, Shuangliang Li, Jingdong Wang, Guangzhong Hu
{"title":"Modeling of the Arc Characteristics inside a Thermal Laminar Plasma Torch with Different Gas Components","authors":"Jing Tao, Changpeng Li, Xiuquan Cao, Shuangliang Li, Jingdong Wang, Guangzhong Hu","doi":"10.3390/pr12061207","DOIUrl":"https://doi.org/10.3390/pr12061207","url":null,"abstract":"For low costs, numerical simulation is an effective method to reveal the internal mechanisms inside a thermal plasma torch. Various simulation models for studying the inside or outside characteristics of thermal plasma torches have been built and discussed. However, to reveal the inside mechanisms of thermal plasma torches under various working conditions to support the materials processing, more attention should be paid to building precise models of laminar plasma torches. Thus, based on the user-defined function (UDF) and user-defined scalar (UDS) of ANSYS Fluent software, the assumptions, governing equations, boundary conditions, and solving method were discussed in detail, and a corresponding numerical model of a homemade laminar plasma torch was first built. For verifying the effectiveness of the proposed numerical model and studying the influence of the gas components on the arc characteristics, the working conditions and experimental setups were introduced in sequence. Finally, the numerical and experimental results of the homemade laminar plasma torch were obtained and discussed in detail. The study results show that: ① The axial temperature of the plasma torch could be divided into three sections along the axis: peak temperature area (10 mm < x < 20 mm), stable temperature area (20 mm < x < 62 mm) and decrease temperature area (62 mm < x < 95 mm). Under the same input conditions, when pure argon gas was used, the peak temperature at the outlet was reached at approximately 7590 K, while for pure nitrogen and 50%Ar + 50%N2, the corresponding peak temperatures were 6785 K and 7402.2 K, respectively. ② The axial velocity of pure nitrogen is much higher than that of pure argon and 50%Ar + 50%N2, while that of pure argon and 50%Ar + 50%N2 has little difference. In addition, when nitrogen gas was used, the peak velocity at the outlet reached 185 m/s, whereas, for argon gas and 50%Ar + 50%N2, the corresponding peak velocities were 146 m/s and 169 m/s, respectively. ③ The simulated arc voltage trends under different working conditions are well in accordance with the experimental arc voltage trends.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"99 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141352229","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
Experimental Investigations and Optimum Performance Evaluation of Wire-EDM Characteristics of Aluminium 6061-Magnesite Composites 铝 6061 镁复合材料线切割特性的实验研究和最佳性能评估
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061200
Matheshwaran Saminathan, Solaiyappan Ayyappan, Sivanandi Periyasamy, Mahalingam Sivakumar
{"title":"Experimental Investigations and Optimum Performance Evaluation of Wire-EDM Characteristics of Aluminium 6061-Magnesite Composites","authors":"Matheshwaran Saminathan, Solaiyappan Ayyappan, Sivanandi Periyasamy, Mahalingam Sivakumar","doi":"10.3390/pr12061200","DOIUrl":"https://doi.org/10.3390/pr12061200","url":null,"abstract":"It is essential to determine the most suitable machining method for magnesite-reinforced Aluminium 6061 composites, which possess excellent mechanical properties, especially notable tensile strength and hardness. The composites were produced using a stir-casting technique, incorporating reinforcements of lightly-calcined magnesite, dead burnt magnesite, and waste magnesite in weight fractions of 2.5%, 5%, and 7.5% within an aluminium 6061 matrix. Wire electrical discharge machining was employed to investigate the machining characteristics of these composites, using controllable process parameters such as cutting speed, pulse-on and pulse-off times, and the weight fraction of magnesites. Two performance indicators such as surface roughness and material removal rate were tested for various parameter combinations by central composite design. To comprehend the impact of the study parameters, contour charts were drawn. MRR increases at a high cutting speed of 2 mm/min when the pulse-on time changes from 120 μs to 125 μs. SR increases when the pulse-on times above 120 μs at all cutting speeds. High cutting speeds make high MRR irrespective of the weight fractions of reinforcement. High pulse-on times make the material melt more, which increases the material removal rate. Because specimen surface material erodes quickly and forms microcracks, high pulse-on time also results in high surface roughness. To optimize the WEDM machining conditions for each composite, hybrid SSO-DF and DFO-DF optimizers were developed by combining the desirability function with Salp-swarm optimization and Dragonfly optimization algorithms. The cutting speed of 2 mm/min and the pulse-on time of 114 μs produce the best performances on the composites.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"76 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141353206","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
Extracts of Senecio brasiliensis and Solanum viarum as Potential Antifungal and Bioherbicidal Agents 作为潜在抗真菌和生物杀草剂的巴西茄和茄属植物提取物
Processes Pub Date : 2024-06-12 DOI: 10.3390/pr12061208
T. Confortin, Izelmar Todero, Luciana Luft, Silvana Schmaltz, João H. C. Wancura, M. S. D. dos Santos, T. Brun, M. Mazutti, G. Zabot, Crisleine P. Draszewski, Ederson R. Abaide, M. Tres
{"title":"Extracts of Senecio brasiliensis and Solanum viarum as Potential Antifungal and Bioherbicidal Agents","authors":"T. Confortin, Izelmar Todero, Luciana Luft, Silvana Schmaltz, João H. C. Wancura, M. S. D. dos Santos, T. Brun, M. Mazutti, G. Zabot, Crisleine P. Draszewski, Ederson R. Abaide, M. Tres","doi":"10.3390/pr12061208","DOIUrl":"https://doi.org/10.3390/pr12061208","url":null,"abstract":"Ultrasound-assisted extraction is an interesting tool for obtaining bioactive compounds from plant matrices applicable as agricultural bio-inputs, as it increases the extraction efficiency, reducing the process time and the use of solvents. This technique uses ultrasonic waves to break down plant cell walls, releasing bioactive compounds quickly and effectively and promoting a sustainable path to obtaining bio-inputs. Accordingly, this research study reports pioneering results regarding the herbicidal and fungicidal potential of different extracts obtained from Senecio brasiliensis (samples from flowers, leaves, and stalks) and Solanum viarum (samples from fruits and roots), two weeds typically found in rural areas of South America. The fungicidal activity of the samples was tested on two fungi, i.e., Fusarium graminearum and Sclerotinia sclerotiorum, while the herbicidal action of the extracts was evaluated in pre-emergence tests in cucumber (Cucumis sativus) seeds. The successful results indicated a high antifungal and herbicidal potential of the extracts obtained for both weeds, with the inhibitory effect against both fungi achieving up to 82%, and the inhibition of C. sativus seed germination reaching 100% for all samples.","PeriodicalId":506892,"journal":{"name":"Processes","volume":"138 32","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350924","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
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