首页 > 最新文献

Journal of Engineering Studies and Research最新文献

英文 中文
A COMPARATIVE STUDY ON THE EFFECT OF SISAL FIBRE AND WASTE PLASTIC STRIPS IN STRUCTURAL STRENGTH IMPROVEMENT OF TROPICAL BLACK CLAY 剑麻纤维与废塑料条在提高热带黑粘土结构强度中作用的比较研究
Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.009
Yohanna Paul, Badamasi Abdulrahman, Ishola Kazeem, Odoh Kelvin Chukwuebuka, Abdulkadir Mohammed Nyako, Fwangshak Gayus Mije
A study on the effect of sisal fibre and waste plastic strips on tropical black clay (also called Black cotton soil, BCS) was carried out. Tests piloted on the natural and treated soil consist of California bearing ratio (CBR), Atterberg limits and compaction for different percentages inclusion of sisal fibre (0, 0.5, 1, 1.5 and 2%) and waste plastic strips (0, 0.5, 1, 1.5 and 2%) by dry weight of soil. Results obtained showed that the liquid limit of BCS initially fluctuated between 43.4% and 55.9% at 1% sisal fibre content, then dropped to 49.4% at 2% sisal fibre content. In the case soil treated with waste plastic strips, liquid values increased from 43.4% for the natural soil to a highest value of 58% at 1% waste plastic strips and thereafter decreased to 49.15% at 2% waste plastic strips content. Plastic limit for both BCS-sisal fibre/ waste plastic strips initially decreased from its natural value of 25.78 to 15.55 and 14.77% when treated with sisal fibre and waste plastic strips respectively at 0.5% admixtures content. In the case of plasticity index, values initially increase from its natural value of 17.66% to peak values of 35.39 and 43.23% for sisal fibre and waste plastic strips treated soil respectively, and thereafter decreased. Maximum dry density (MDD) initially increased from 1.55 mg/m3 at 0%, to 1.60 mg/m3 at 0.5% and thereafter decreased to 1.53 mg/m3 at 2% of fibre content. In the case of samples treated with waste plastic strips. The MDD progressively increased as the amount of waste plastic strips increased. OMC show an overall trend of increase for BCS treated with sisal fibre, and a general trend of decrease for soil treated with waste plastic strips. The CBR values initially lessened from their natural value of 13.59% to 4.76% at 1% sisal fibre and subsequently increased to 10.57% at 2% sisal fibre. Similar behaviour was observed for soil modified with waste plastic strips. Based on the results, BCS/waste plastic strips improved the soil more than BCS/sisal fibre treated soil and is recommended at optimal 2% waste plastic strips for geotechnical engineering application such as road payment.
研究了剑麻纤维和废塑料条对热带黑粘土(也称黑棉土,BCS)的影响。在天然和处理过的土壤上进行的试验包括加利福尼亚承载比(CBR)、阿太堡极限和压实度,以土壤干重计,不同百分比的剑麻纤维(0、0.5、1、1.5和2%)和废塑料带(0、0.5%、1、1.5%和2%)。结果表明,当剑麻纤维含量为1%时,BCS的液限最初在43.4%至55.9%之间波动,然后在剑麻纤维浓度为2%时降至49.4%。在用废塑料条处理的土壤中,液体值从天然土壤的43.4%增加到1%废塑料条时的最高值58%,然后在2%废塑料条含量时下降到49.15%。BCS剑麻纤维/废塑料带的塑性极限最初从25.78的自然值下降到15.55和14.77%,当分别用剑麻纤维和废塑料带处理时,外加剂含量为0.5%。在塑性指数的情况下,剑麻纤维和废塑料带处理土壤的值最初分别从17.66%的自然值增加到35.39%和43.23%的峰值,然后下降。最大干密度(MDD)最初从0%时的1.55 mg/m3增加到0.5%时的1.60 mg/m3,然后在纤维含量为2%时降低到1.53 mg/m3。对于用废塑料条处理过的样品。MDD随着废塑料条数量的增加而逐渐增加。用剑麻纤维处理的BCS的OMC总体呈上升趋势,而用废塑料带处理的土壤的OMC则总体呈下降趋势。在1%剑麻纤维的情况下,CBR值最初从13.59%的自然值降低到4.76%,随后在2%剑麻纤维时增加到10.57%。用废塑料条改性的土壤也观察到了类似的行为。根据研究结果,BCS/废塑料带比BCS/剑麻纤维处理的土壤对土壤的改善更大,建议在岩土工程应用(如道路付款)中使用2%的最佳废塑料带。
{"title":"A COMPARATIVE STUDY ON THE EFFECT OF SISAL FIBRE AND WASTE PLASTIC STRIPS IN STRUCTURAL STRENGTH IMPROVEMENT OF TROPICAL BLACK CLAY","authors":"Yohanna Paul, Badamasi Abdulrahman, Ishola Kazeem, Odoh Kelvin Chukwuebuka, Abdulkadir Mohammed Nyako, Fwangshak Gayus Mije","doi":"10.29081/jesr.v28i2.009","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.009","url":null,"abstract":"A study on the effect of sisal fibre and waste plastic strips on tropical black clay (also called Black cotton soil, BCS) was carried out. Tests piloted on the natural and treated soil consist of California bearing ratio (CBR), Atterberg limits and compaction for different percentages inclusion of sisal fibre (0, 0.5, 1, 1.5 and 2%) and waste plastic strips (0, 0.5, 1, 1.5 and 2%) by dry weight of soil. Results obtained showed that the liquid limit of BCS initially fluctuated between 43.4% and 55.9% at 1% sisal fibre content, then dropped to 49.4% at 2% sisal fibre content. In the case soil treated with waste plastic strips, liquid values increased from 43.4% for the natural soil to a highest value of 58% at 1% waste plastic strips and thereafter decreased to 49.15% at 2% waste plastic strips content. Plastic limit for both BCS-sisal fibre/ waste plastic strips initially decreased from its natural value of 25.78 to 15.55 and 14.77% when treated with sisal fibre and waste plastic strips respectively at 0.5% admixtures content. In the case of plasticity index, values initially increase from its natural value of 17.66% to peak values of 35.39 and 43.23% for sisal fibre and waste plastic strips treated soil respectively, and thereafter decreased. Maximum dry density (MDD) initially increased from 1.55 mg/m3 at 0%, to 1.60 mg/m3 at 0.5% and thereafter decreased to 1.53 mg/m3 at 2% of fibre content. In the case of samples treated with waste plastic strips. The MDD progressively increased as the amount of waste plastic strips increased. OMC show an overall trend of increase for BCS treated with sisal fibre, and a general trend of decrease for soil treated with waste plastic strips. The CBR values initially lessened from their natural value of 13.59% to 4.76% at 1% sisal fibre and subsequently increased to 10.57% at 2% sisal fibre. Similar behaviour was observed for soil modified with waste plastic strips. Based on the results, BCS/waste plastic strips improved the soil more than BCS/sisal fibre treated soil and is recommended at optimal 2% waste plastic strips for geotechnical engineering application such as road payment.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48053077","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
ADSORPTION OF NICKEL (II) IONS FROM SOLUTION USING SAWDUST AND MODIFIED SAWDUST 木屑和改性木屑对溶液中镍离子的吸附
Pub Date : 2022-09-01 DOI: 10.29081/jesr.v28i2.007
B. Olufemi, Emeka Nnanna
By varying adsorbate concentration, temperature, contact time, pH, and adsorbent weight, the capacity of non-modified (NM) and modified (M) sawdust adsorbents to adsorb Ni2+ ions were studied in this work. The adsorption of Ni (II) ions rose as the adsorbent weight increased but reduced as the adsorbate concentration increased. Adsorption was greatest at pH 6, with the NM and M adsorbents removing 95.09 and 96.95% of Ni2+ ions, respectively. The highly dependent nature of the percent removal on operational variables was established by employing Analysis of Variance (ANOVA) as well as the Bonferroni-Holm Posthoc statistical test relationship significance. It was discovered that the NM and M sawdust are adequate adsorbents in removing Ni2+ cations from its solution. Freundlich, Langmuir, Temkin and Dubinin Raduschkevich (DR) isotherms were applied to match the sorption data. The adsorption of the two biosorbents was best characterized by the Freundlich isotherm model. Chemisorption was suspected based on the energy values obtained from the Temkin and DR isotherms. The second order kinetics best fit both the NM and M adsorption activities. The ability to absorb Ni (II) ions is impressive.
通过改变吸附剂浓度、温度、接触时间、pH和吸附剂重量,研究了未改性(NM)和改性(M)木屑吸附剂对Ni2+离子的吸附能力。对Ni (II)离子的吸附量随吸附剂质量的增加而增加,随吸附剂浓度的增加而降低。在pH为6时吸附效果最好,NM和M吸附剂对Ni2+的去除率分别为95.09和96.95%。通过方差分析(ANOVA)和Bonferroni-Holm postthoc统计检验关系显著性,确定了去除率对操作变量的高度依赖性质。发现NM和M木屑是去除溶液中Ni2+阳离子的较好吸附剂。采用Freundlich, Langmuir, Temkin和Dubinin Raduschkevich (DR)等温线对吸附数据进行拟合。两种生物吸附剂的吸附用Freundlich等温线模型进行了最好的表征。根据从Temkin和DR等温线得到的能量值,怀疑是化学吸附。二级动力学最适合NM和M的吸附活性。吸收Ni (II)离子的能力令人印象深刻。
{"title":"ADSORPTION OF NICKEL (II) IONS FROM SOLUTION USING SAWDUST AND MODIFIED SAWDUST","authors":"B. Olufemi, Emeka Nnanna","doi":"10.29081/jesr.v28i2.007","DOIUrl":"https://doi.org/10.29081/jesr.v28i2.007","url":null,"abstract":"By varying adsorbate concentration, temperature, contact time, pH, and adsorbent weight, the capacity of non-modified (NM) and modified (M) sawdust adsorbents to adsorb Ni2+ ions were studied in this work. The adsorption of Ni (II) ions rose as the adsorbent weight increased but reduced as the adsorbate concentration increased. Adsorption was greatest at pH 6, with the NM and M adsorbents removing 95.09 and 96.95% of Ni2+ ions, respectively. The highly dependent nature of the percent removal on operational variables was established by employing Analysis of Variance (ANOVA) as well as the Bonferroni-Holm Posthoc statistical test relationship significance. It was discovered that the NM and M sawdust are adequate adsorbents in removing Ni2+ cations from its solution. Freundlich, Langmuir, Temkin and Dubinin Raduschkevich (DR) isotherms were applied to match the sorption data. The adsorption of the two biosorbents was best characterized by the Freundlich isotherm model. Chemisorption was suspected based on the energy values obtained from the Temkin and DR isotherms. The second order kinetics best fit both the NM and M adsorption activities. The ability to absorb Ni (II) ions is impressive.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47494330","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
DIMETHYL N-CYANODITHIOIMINOCARBONATE AND TRIPHENYLPHOSPHINE OXIDE METAL HALIDE COMPLEXES: MOLECULAR CRYSTAL ELUCIDATION 二甲基氰二硫代亚胺碳酸酯和氧化三苯基膦金属卤化物配合物:分子晶体解析
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.284
M. Diop, M. Sarr, L. Diop,, A. Oliver, D. Hughes
Two MX2 (M = Ni, Zn; X = Cl, Br) dimethyl N-cyanodithioiminocarbonate compounds and one CrCl2 triphenylphosphine oxide complex were isolated and elucidated by single crystal X-ray crystallography. NiCl2[(CH3S)2C═NC≡N]2 (1) features inversion-related hydrogen bonded dimers linked into chains interacting through C-H···Cl growing layers along [110] whose junction into a 3D structure is enabled by H-bonds. ZnBr2[(CH3S)2C═NC≡N]2 (2) also exhibits inversion-related H-bonded dimers. In contrast with 1, the structure of 2 comprises chains along [110], connected via C-H···Br and C-H···S into a 2D layer along [-110]. CrCl2(OPPh3)2 (3) obtaining undergone redox processes, oxidizing [CH3C(O)CH2PPh3]+ to form PPh3PO, and reducing Cr from CrVI to CrII. In the structure, each molecule is linked to height neighbors through H-bonds affording a 3D network.
用单晶X射线晶体学分离鉴定了两个MX2(M=Ni,Zn;X=Cl,Br)二甲基N-氰基二硫代亚氨基碳酸酯化合物和一个CrCl2三苯基氧化膦配合物。NiCl2[(CH3S)2C═NC lect N]2(1)的特征是通过沿[110]生长的C-H··Cl层连接成链的与反转相关的氢键二聚体,其通过氢键连接成3D结构。ZnBr2[(CH3S)2C═NC≠N]2(2)也表现出与反转相关的氢键二聚体。与1相反,2的结构包括沿[110]的链,通过C-H··Br和C-H·S连接成沿[-110]的2D层。CrCl2(OPPh3)2(3)经过氧化还原过程,氧化[CH3C(O)CH2PPh3]+形成PPh3PO,并将Cr从CrVI还原为CrII。在该结构中,每个分子通过氢键与高度相邻分子连接,形成3D网络。
{"title":"DIMETHYL N-CYANODITHIOIMINOCARBONATE AND TRIPHENYLPHOSPHINE OXIDE METAL HALIDE COMPLEXES: MOLECULAR CRYSTAL ELUCIDATION","authors":"M. Diop, M. Sarr, L. Diop,, A. Oliver, D. Hughes","doi":"10.29081/jesr.v27i3.284","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.284","url":null,"abstract":"Two MX2 (M = Ni, Zn; X = Cl, Br) dimethyl N-cyanodithioiminocarbonate compounds and one CrCl2 triphenylphosphine oxide complex were isolated and elucidated by single crystal X-ray crystallography. NiCl2[(CH3S)2C═NC≡N]2 (1) features inversion-related hydrogen bonded dimers linked into chains interacting through C-H···Cl growing layers along [110] whose junction into a 3D structure is enabled by H-bonds. ZnBr2[(CH3S)2C═NC≡N]2 (2) also exhibits inversion-related H-bonded dimers. In contrast with 1, the structure of 2 comprises chains along [110], connected via C-H···Br and C-H···S into a 2D layer along [-110]. CrCl2(OPPh3)2 (3) obtaining undergone redox processes, oxidizing [CH3C(O)CH2PPh3]+ to form PPh3PO, and reducing Cr from CrVI to CrII. In the structure, each molecule is linked to height neighbors through H-bonds affording a 3D network.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":"13 9-10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41288628","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
HETEROGENEOUS CATALYSIS USING BENTONITE-SUPPORTED Fe-Co-Ni TRIMETALLIC NANOPARTICLES 膨润土负载铁钴镍三金属纳米颗粒的非均相催化
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.282
Aderibigbe F Alade, Adewoye Tunmise Latifat, M. S. Ishola, M. Alhassan, Saka H. Bamidele, Ajala Elijah Olawale, Oluwaseyi Soile Samuel
Herein, the synthesis and characterization of a bentonite-supported Fe-Co-Ni trimetallic nanocatalyst applied in transesterification reaction was reported. The synthesized heterogeneous catalyst was used to investigate the production of biodiesel by varying the reaction parameters using Box-Behnken design response surface methodology (RSM-BBD). An optimum biodiesel yield of 95.2 % was obtained at methanol to oil ratio of 10:1, reaction time of 2 hours, reaction temperature of 55  and catalyst concentration of 5 % (w/w of the oil). The biodiesel produced was later analysed using GC-MS analysis and the results shows a fatty acid methyl esters (FAME) profile that confirms the presence of biodiesel.
本文报道了一种用于酯交换反应的膨润土负载的Fe-Co-Ni三金属纳米催化剂的合成和表征。采用Box-Behnken设计响应面法(RSM-BBD),通过改变反应参数,对合成的多相催化剂制备生物柴油进行了研究。在甲醇油比为10:1、反应时间为2小时、反应温度为55、催化剂浓度为5% (w/w)的条件下,生物柴油的最佳产率为95.2%。生产的生物柴油随后使用气相色谱-质谱分析进行分析,结果显示脂肪酸甲酯(FAME)谱图证实了生物柴油的存在。
{"title":"HETEROGENEOUS CATALYSIS USING BENTONITE-SUPPORTED Fe-Co-Ni TRIMETALLIC NANOPARTICLES","authors":"Aderibigbe F Alade, Adewoye Tunmise Latifat, M. S. Ishola, M. Alhassan, Saka H. Bamidele, Ajala Elijah Olawale, Oluwaseyi Soile Samuel","doi":"10.29081/jesr.v27i3.282","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.282","url":null,"abstract":"Herein, the synthesis and characterization of a bentonite-supported Fe-Co-Ni trimetallic nanocatalyst applied in transesterification reaction was reported. The synthesized heterogeneous catalyst was used to investigate the production of biodiesel by varying the reaction parameters using Box-Behnken design response surface methodology (RSM-BBD). An optimum biodiesel yield of 95.2 % was obtained at methanol to oil ratio of 10:1, reaction time of 2 hours, reaction temperature of 55  and catalyst concentration of 5 % (w/w of the oil). The biodiesel produced was later analysed using GC-MS analysis and the results shows a fatty acid methyl esters (FAME) profile that confirms the presence of biodiesel.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44011672","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
AN AUTOMATED SKIN DISEASE DIAGNOSTIC SYSTEM BASED ON DEEP LEARNING MODEL 基于深度学习模型的皮肤病自动诊断系统
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.287
L. Omotosho, K. Sotonwa, B. Adegoke, Oluwashina A. Oyeniran, Joshua O. Oyeniyi
The use of computer technology has significantly advanced the medical sector, and many computer technologies have been used to develop healthcare, such as the patient management system, monitoring and control systems, and diagnostic systems. Technological advances in healthcare have also helped in saving numerous patients and are constantly improving our quality of life. Technology in the medical sector has also had a major effect on almost all healthcare professional techniques and practices. In order to facilitate rapid diagnosis and treatment of different skin diseases by the use of a deep learning model, this study developed a comprehensive framework to improve the decision-making of dermatologists in Nigeria in terms of the diagnosis of selected skin diseases. The developed system achieved the network accuracy of 98.44 % and the validation accuracy of the test set is 99.44 % as specified by the training results, further testing reveal that the developed system yielded rejection rate of 2.2 % and recognition accuracy of 97.8 %.
计算机技术的使用极大地促进了医疗部门的发展,许多计算机技术已被用于开发医疗保健,如患者管理系统、监测和控制系统以及诊断系统。医疗保健的技术进步也帮助挽救了许多患者,并不断提高我们的生活质量。医疗部门的技术也对几乎所有的医疗专业技术和实践产生了重大影响。为了通过使用深度学习模型促进不同皮肤病的快速诊断和治疗,本研究开发了一个全面的框架,以改进尼日利亚皮肤科医生在诊断选定皮肤病方面的决策。根据训练结果,所开发的系统实现了98.44%的网络准确率和99.44%的测试集验证准确率,进一步的测试表明,所开发系统的拒绝率为2.2%,识别准确率为97.8%。
{"title":"AN AUTOMATED SKIN DISEASE DIAGNOSTIC SYSTEM BASED ON DEEP LEARNING MODEL","authors":"L. Omotosho, K. Sotonwa, B. Adegoke, Oluwashina A. Oyeniran, Joshua O. Oyeniyi","doi":"10.29081/jesr.v27i3.287","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.287","url":null,"abstract":"The use of computer technology has significantly advanced the medical sector, and many computer technologies have been used to develop healthcare, such as the patient management system, monitoring and control systems, and diagnostic systems. Technological advances in healthcare have also helped in saving numerous patients and are constantly improving our quality of life. Technology in the medical sector has also had a major effect on almost all healthcare professional techniques and practices. In order to facilitate rapid diagnosis and treatment of different skin diseases by the use of a deep learning model, this study developed a comprehensive framework to improve the decision-making of dermatologists in Nigeria in terms of the diagnosis of selected skin diseases. The developed system achieved the network accuracy of 98.44 % and the validation accuracy of the test set is 99.44 % as specified by the training results, further testing reveal that the developed system yielded rejection rate of 2.2 % and recognition accuracy of 97.8 %.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46708344","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 ANALYTICAL DETERMINATION OF THERMAL PROTECTION BEHAVIOR FOR EXPERIMENTAL MODELS MADE OF STRATIFIED BIOCOMPOSITE BOARDS OF LIGNO-CELLULOSE NATURE 木质细胞性分层生物复合板实验模型热防护性能的比较分析测定
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.286
S. A. Nitu, R. Iatan, Ion Durbacă, Gabriel Petrosel, Elena Surdu, D. C. FARCAS - FLAMAROPOL
The paper addresses the comparative analytical determination of thermal insulation behavior for various experimental models made of stratified and hybrid biocomposites of ligno-cellulose nature. The analytical determination of the thermal resistance and the overall thermal insulation coefficient for each experimental model is performed using the calculation methodology for energy efficiency. The results obtained after the analysis of the thermal insulation behavior for the biocomposite panels highlighted the fact that they have thermal insulation properties with high values for thermal resistance and global thermal insulation coefficients.
本文讨论了由木质纤维素性质的分层和混合生物复合材料制成的各种实验模型的隔热性能的比较分析测定。使用能效计算方法对每个实验模型的热阻和总隔热系数进行分析确定。在分析生物复合材料面板的隔热行为后获得的结果强调了这样一个事实,即它们具有高热阻值和全局隔热系数的隔热性能。
{"title":"COMPARATIVE ANALYTICAL DETERMINATION OF THERMAL PROTECTION BEHAVIOR FOR EXPERIMENTAL MODELS MADE OF STRATIFIED BIOCOMPOSITE BOARDS OF LIGNO-CELLULOSE NATURE","authors":"S. A. Nitu, R. Iatan, Ion Durbacă, Gabriel Petrosel, Elena Surdu, D. C. FARCAS - FLAMAROPOL","doi":"10.29081/jesr.v27i3.286","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.286","url":null,"abstract":"The paper addresses the comparative analytical determination of thermal insulation behavior for various experimental models made of stratified and hybrid biocomposites of ligno-cellulose nature. The analytical determination of the thermal resistance and the overall thermal insulation coefficient for each experimental model is performed using the calculation methodology for energy efficiency. The results obtained after the analysis of the thermal insulation behavior for the biocomposite panels highlighted the fact that they have thermal insulation properties with high values for thermal resistance and global thermal insulation coefficients.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49306685","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
ELECTRICITY METER WITH THE FACILITY TO DETERMINE THE QUALITY OF THE ELECTRICITY SUPPLIED 具有确定供电质量的设施的电表
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.290
D. Rotar, George Culea
Many areas of activity face the problem of electricity quality. At the same time, diagnosing the quality of the energy provided makes it possible to identify and remedy problems that have arisen in the system. Advanced signal processing techniques and the use of advanced systems allow for a complex analysis of the phenomenon. The paper presents an electricity meter equipped with an electricity quality analysis system. It was developed based on the Xilinx Artix-7 programmable logic matrix. A Digilent Arty A7 development board was used due to its design and experimentation facilities. The developed system determines the power consumed and the main elements that define the quality of electricity: harmonics and other deviations from the frequency of nominal power supply, flicker, voltage gaps, voltage variations, transient surge, temporary surge, etc. The possibility of using an embedded system equipped with the Microblaze soft microprocessor, the existence of a 12-bit analog-digital converter and the maximum sampling frequency of 1 MSPS and the possibility of assisted design allows to obtain a measurement system with superior characteristics. The results obtained and the experiments carried out confirm the expected performance for the electricity meter.
许多地区的活动都面临着电力质量的问题。同时,对所提供能源的质量进行诊断,使识别和纠正系统中出现的问题成为可能。先进的信号处理技术和先进系统的使用允许对这种现象进行复杂的分析。本文介绍了一种装有电能质量分析系统的电能表。它是基于赛灵思Artix-7可编程逻辑矩阵开发的。由于其设计和实验设施,使用了Digilent Arty A7开发板。所开发的系统确定了所消耗的功率和定义电力质量的主要因素:谐波和其他偏离标称电源频率的偏差、闪烁、电压间隙、电压变化、瞬态浪涌、临时浪涌等。使用配备Microblaze软微处理器的嵌入式系统的可能性,12位模数转换器的存在和1msps的最大采样频率以及辅助设计的可能性允许获得具有优越特性的测量系统。所得到的结果和所进行的实验证实了该电能表的预期性能。
{"title":"ELECTRICITY METER WITH THE FACILITY TO DETERMINE THE QUALITY OF THE ELECTRICITY SUPPLIED","authors":"D. Rotar, George Culea","doi":"10.29081/jesr.v27i3.290","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.290","url":null,"abstract":"Many areas of activity face the problem of electricity quality. At the same time, diagnosing the quality of the energy provided makes it possible to identify and remedy problems that have arisen in the system. Advanced signal processing techniques and the use of advanced systems allow for a complex analysis of the phenomenon. The paper presents an electricity meter equipped with an electricity quality analysis system. It was developed based on the Xilinx Artix-7 programmable logic matrix. A Digilent Arty A7 development board was used due to its design and experimentation facilities. The developed system determines the power consumed and the main elements that define the quality of electricity: harmonics and other deviations from the frequency of nominal power supply, flicker, voltage gaps, voltage variations, transient surge, temporary surge, etc. The possibility of using an embedded system equipped with the Microblaze soft microprocessor, the existence of a 12-bit analog-digital converter and the maximum sampling frequency of 1 MSPS and the possibility of assisted design allows to obtain a measurement system with superior characteristics. The results obtained and the experiments carried out confirm the expected performance for the electricity meter.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43099731","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
ASPECTS REGARDING THE CUTTING CAPACITY OF DIAMOND DISCS USED IN THE FLAT GRINDING OF HARD GRANITE AND BASALT MINERAL MATERIALS 关于用于硬质花岗岩和玄武岩矿物材料平面磨削的金刚石圆盘的切削能力的几个方面
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.292
Petre Valea
The paper presents how to determine the partial and global cutting capacity (CC) based on technological evaluation criteria (sustainability, specific energy consumption, cutting forces, roughness) and technical economic criteria (grinding productivity and cost). The theoretical-experimental model that allows the determination of the global CC for diamond discs takes into account the specific features of these super abrasive tools and the cutting process for flat grinding of hard mineral materials granite and basalt. Also, are presented the characteristics of diamond discs, the experimental stand and the factorial plans used in the experimental part.
本文介绍了如何根据技术评估标准(可持续性、比能耗、切削力、粗糙度)和技术经济标准(磨削生产率和成本)来确定局部和全局切削能力。理论实验模型允许确定金刚石圆盘的全局CC,该模型考虑了这些超级研磨工具的具体特征以及用于平面研磨硬质矿物材料花岗岩和玄武岩的切割过程。此外,还介绍了金刚石圆盘的特性、实验台和实验部分使用的析因方案。
{"title":"ASPECTS REGARDING THE CUTTING CAPACITY OF DIAMOND DISCS USED IN THE FLAT GRINDING OF HARD GRANITE AND BASALT MINERAL MATERIALS","authors":"Petre Valea","doi":"10.29081/jesr.v27i3.292","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.292","url":null,"abstract":"The paper presents how to determine the partial and global cutting capacity (CC) based on technological evaluation criteria (sustainability, specific energy consumption, cutting forces, roughness) and technical economic criteria (grinding productivity and cost). The theoretical-experimental model that allows the determination of the global CC for diamond discs takes into account the specific features of these super abrasive tools and the cutting process for flat grinding of hard mineral materials granite and basalt. Also, are presented the characteristics of diamond discs, the experimental stand and the factorial plans used in the experimental part.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48667018","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
REDUCING THE ENERGY CONSUMPTION OF SYSTEMS WITH THE INTEGRATED CIRCUIT TI 430FR2433 采用ti 430fr2433集成电路,降低系统能耗
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.291
D. Rotar, Dragoș Andrioaia
The Texas Instruments microcontrollers in the MSP 430 series offer four ways to save power in operation in such a way as to allow for consistent reduction of the electricity consumed. Code Composer Studio programming environment also provides support in making low-power applications. In addition to these, the MSP430FR2433 microcontroller with ferroelectric RAM allows data to be stored even in the absence of power voltage. In view of these properties of the microcontroller, a data logger application has been developed to monitor the quality of the environment in a building. Given that the MSP430FR2433 microcontroller can process both analog and numerical signals, the device monitors the temperature, humidity, carbon dioxide concentration and amount of light present in the enclosure. Thanks to energy-saving mechanisms and the possibility of keeping information for an indefinite period without the need for energy consumption, the ambient quality monitoring device can operate for a long time in places without energy resources. The device has also been tested with good results for autonomous operation using solar energy and has also been used to determine the energy performance of buildings.
MSP430系列中的德州仪器微控制器提供了四种在运行中节省电力的方法,从而可以持续减少电力消耗。Code Composer Studio编程环境还支持制作低功耗应用程序。除此之外,带有铁电RAM的MSP430FR2433微控制器允许即使在没有电源电压的情况下也可以存储数据。鉴于微控制器的这些特性,已经开发了一种数据记录器应用程序来监测建筑物中的环境质量。考虑到MSP430FR2433微控制器可以处理模拟和数字信号,该设备可以监测外壳中的温度、湿度、二氧化碳浓度和光量。由于节能机制和在不需要能源消耗的情况下无限期保存信息的可能性,环境质量监测设备可以在没有能源资源的地方长时间运行。该设备还经过测试,在使用太阳能的自主运行中取得了良好的结果,并被用于确定建筑物的能源性能。
{"title":"REDUCING THE ENERGY CONSUMPTION OF SYSTEMS WITH THE INTEGRATED CIRCUIT TI 430FR2433","authors":"D. Rotar, Dragoș Andrioaia","doi":"10.29081/jesr.v27i3.291","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.291","url":null,"abstract":"The Texas Instruments microcontrollers in the MSP 430 series offer four ways to save power in operation in such a way as to allow for consistent reduction of the electricity consumed. Code Composer Studio programming environment also provides support in making low-power applications. In addition to these, the MSP430FR2433 microcontroller with ferroelectric RAM allows data to be stored even in the absence of power voltage. In view of these properties of the microcontroller, a data logger application has been developed to monitor the quality of the environment in a building. Given that the MSP430FR2433 microcontroller can process both analog and numerical signals, the device monitors the temperature, humidity, carbon dioxide concentration and amount of light present in the enclosure. Thanks to energy-saving mechanisms and the possibility of keeping information for an indefinite period without the need for energy consumption, the ambient quality monitoring device can operate for a long time in places without energy resources. The device has also been tested with good results for autonomous operation using solar energy and has also been used to determine the energy performance of buildings.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47886832","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
STABILITY CONTROL MODELLING UNDER DYNAMIC MOTION SCENARIO OF A DIFFERENTIAL DRIVE ROBOT 差动驱动机器人动态运动场景下的稳定性控制建模
Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.289
Adedotun O. Owojori, K. Akingbade, W. Apena, E. Ogunti
Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomous driving in differential drive robot. Basically, differential drive robotic system describes an unstable, nonlinear system related to an inverted pendulum. The research attempts to harness the parameters obtained from a computer-aided design tool (Solid works) to model the system for complete stability control and dynamic motion of the system within a planned trajectory. A linearized dynamic equation is obtained for the overall system design of a mobile robot, and the linear quadratic regulator concept is adopted to obtain an optimum state feedback gain. The simulation results are obtained on MATLAB software interfaced with an Arduino board with deployable sensor technologies. Scenarios of disturbance would be simulated to ascertain the stability conditions of the system at static position or dynamic position. Signal analysis and computer vision techniques serve as leverage to make the design achievable. Localization and navigation referred to as tracking a planned trajectory or moving through paths filled with obstacles in a given space are also included.
将智能融入许多设备中,使差动驱动机器人更容易实现自平衡和自动驾驶。基本上,差速驱动机器人系统描述了一个与倒立摆有关的不稳定、非线性系统。该研究试图利用从计算机辅助设计工具(Solidworks)获得的参数来对系统进行建模,以实现系统在计划轨迹内的完全稳定性控制和动态运动。针对移动机器人的整体系统设计,得到了一个线性化的动力学方程,并采用线性二次调节器的概念来获得最佳状态反馈增益。仿真结果是在MATLAB软件上获得的,该软件与具有可部署传感器技术的Arduino板接口。将模拟扰动场景,以确定系统在静态位置或动态位置的稳定性条件。信号分析和计算机视觉技术是实现设计的杠杆。还包括定位和导航,称为跟踪计划轨迹或在给定空间中穿过充满障碍物的路径。
{"title":"STABILITY CONTROL MODELLING UNDER DYNAMIC MOTION SCENARIO OF A DIFFERENTIAL DRIVE ROBOT","authors":"Adedotun O. Owojori, K. Akingbade, W. Apena, E. Ogunti","doi":"10.29081/jesr.v27i3.289","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.289","url":null,"abstract":"Intelligence incorporated in many devices makes it easier to achieve self-balancing and autonomous driving in differential drive robot. Basically, differential drive robotic system describes an unstable, nonlinear system related to an inverted pendulum. The research attempts to harness the parameters obtained from a computer-aided design tool (Solid works) to model the system for complete stability control and dynamic motion of the system within a planned trajectory. A linearized dynamic equation is obtained for the overall system design of a mobile robot, and the linear quadratic regulator concept is adopted to obtain an optimum state feedback gain. The simulation results are obtained on MATLAB software interfaced with an Arduino board with deployable sensor technologies. Scenarios of disturbance would be simulated to ascertain the stability conditions of the system at static position or dynamic position. Signal analysis and computer vision techniques serve as leverage to make the design achievable. Localization and navigation referred to as tracking a planned trajectory or moving through paths filled with obstacles in a given space are also included.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":"39 34","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41331578","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
期刊
Journal of Engineering Studies and Research
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1