Pub Date : 2023-01-13DOI: 10.1080/02533839.2022.2161943
Tsong-Shing Lee, Te-Chun Hung, Kuan-Chieh Huang
ABSTRACT In this paper, a wireless charging system that can perform coil capacity optimization and dynamic protection is proposed for mobile robots. Poor wireless charging performance might be obtained because of the inability to achieve reliable capacity estimation and effective charging detection; therefore, in this study, suitable solutions were identified for capacity estimation and effective charging detection. First, resonance analysis was conducted on a systematic flexible coil design to maximize its charging capacity. Second, a dynamic protection mechanism was developed to handle unexpected charging mistakes caused by misalignment. Third, a pickup terminal feedback system integrated with a Bluetooth chip and microprocessor unit was embedded to maintain the requisite output voltage. This system was validated through simulations and hardware implementations. The experimental results indicate that a setup based on the proposed design delivers a power of 3.2 kW at an efficiency of 91.4%, which confirms the efficacy and feasibility of the proposed approach for robot charging.
{"title":"Wireless power transfer for mobile robot with capacity optimization and dynamic protection considerations","authors":"Tsong-Shing Lee, Te-Chun Hung, Kuan-Chieh Huang","doi":"10.1080/02533839.2022.2161943","DOIUrl":"https://doi.org/10.1080/02533839.2022.2161943","url":null,"abstract":"ABSTRACT In this paper, a wireless charging system that can perform coil capacity optimization and dynamic protection is proposed for mobile robots. Poor wireless charging performance might be obtained because of the inability to achieve reliable capacity estimation and effective charging detection; therefore, in this study, suitable solutions were identified for capacity estimation and effective charging detection. First, resonance analysis was conducted on a systematic flexible coil design to maximize its charging capacity. Second, a dynamic protection mechanism was developed to handle unexpected charging mistakes caused by misalignment. Third, a pickup terminal feedback system integrated with a Bluetooth chip and microprocessor unit was embedded to maintain the requisite output voltage. This system was validated through simulations and hardware implementations. The experimental results indicate that a setup based on the proposed design delivers a power of 3.2 kW at an efficiency of 91.4%, which confirms the efficacy and feasibility of the proposed approach for robot charging.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"88 1","pages":"128 - 140"},"PeriodicalIF":1.1,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78394884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-12DOI: 10.1080/02533839.2022.2161940
K. Brahim, Maher Manai, Amira Soussi-Baatout, I. Khattech
ABSTRACT The energetic contribution of various phenomena involved in the reaction between the Tunisia phosphate ore and a mixture of phosphoric and sulfuric acids was studied calorimetrically. The enthalpies of the sulfuric acid ionization ( ), the H2PO4 − neutralization ( ), and the phosphate ore dissolution in phosphoric acid alone ( ) or in the mixture of the latter with sulfuric acid ( ) were determined and equal to −58.7 ± 0.7 kJ mol−1, 12.7 ± 1.3 kJ mol−1H2SO4, −186.2 ± 2.2 J g−1 and – 425.6 ± 3.3 J g−1, respectively. The addition time of the sulfuric acid was systematically investigated to reduce the loss of P2O5 in gypsum and the optimal condition for a better yield was deduced.
{"title":"Sulfo-phosphoric attack of the phosphate ore: energetic contribution of each phenomenon intervening during the attack and effect of the time of addition of the sulfuric acid","authors":"K. Brahim, Maher Manai, Amira Soussi-Baatout, I. Khattech","doi":"10.1080/02533839.2022.2161940","DOIUrl":"https://doi.org/10.1080/02533839.2022.2161940","url":null,"abstract":"ABSTRACT The energetic contribution of various phenomena involved in the reaction between the Tunisia phosphate ore and a mixture of phosphoric and sulfuric acids was studied calorimetrically. The enthalpies of the sulfuric acid ionization ( ), the H2PO4 − neutralization ( ), and the phosphate ore dissolution in phosphoric acid alone ( ) or in the mixture of the latter with sulfuric acid ( ) were determined and equal to −58.7 ± 0.7 kJ mol−1, 12.7 ± 1.3 kJ mol−1H2SO4, −186.2 ± 2.2 J g−1 and – 425.6 ± 3.3 J g−1, respectively. The addition time of the sulfuric acid was systematically investigated to reduce the loss of P2O5 in gypsum and the optimal condition for a better yield was deduced.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"104 1","pages":"177 - 186"},"PeriodicalIF":1.1,"publicationDate":"2023-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88987733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-10DOI: 10.1080/02533839.2022.2161942
Xiaofei Liu, Hong Yao, Chengcheng Gong, Lite Zhang, Wenchao Lv, H. Jin, Chao Wang
ABSTRACT The flow-induced corrosion in gas-liquid flow usually occurs in the petrochemical and transportation industries, which has become a hot topic, especially for the elbow system. In this paper, a series of simulations using the VOF method and SST k-ω turbulence models were carried out to investigate the temporal and spatial distributions of the water wetting process in the elbow system. Combined with experiments, the relationship between the dynamic hydrophilic process and the corrosion mechanism was revealed. The results show that there is a stratified flow in the pipe at low speed. Wetness is always present in the inner wall of the elbow, and the corrosion rate reduces as the axial angle increases. As the velocity increases, the flow pattern changes to wave flow. Part of the water in the inner wall is entrained into the gas phase and thrown out onto the outer wall to form the water wetting. The location of maximum wall shear stress is transferred to outer wall, causing an increment of corrosion rate. The corrosion rate of the outer wall increases with the axial angle.
{"title":"Studies on the elbow corrosion associated with the wall-wetting process in stratified and wave flows","authors":"Xiaofei Liu, Hong Yao, Chengcheng Gong, Lite Zhang, Wenchao Lv, H. Jin, Chao Wang","doi":"10.1080/02533839.2022.2161942","DOIUrl":"https://doi.org/10.1080/02533839.2022.2161942","url":null,"abstract":"ABSTRACT The flow-induced corrosion in gas-liquid flow usually occurs in the petrochemical and transportation industries, which has become a hot topic, especially for the elbow system. In this paper, a series of simulations using the VOF method and SST k-ω turbulence models were carried out to investigate the temporal and spatial distributions of the water wetting process in the elbow system. Combined with experiments, the relationship between the dynamic hydrophilic process and the corrosion mechanism was revealed. The results show that there is a stratified flow in the pipe at low speed. Wetness is always present in the inner wall of the elbow, and the corrosion rate reduces as the axial angle increases. As the velocity increases, the flow pattern changes to wave flow. Part of the water in the inner wall is entrained into the gas phase and thrown out onto the outer wall to form the water wetting. The location of maximum wall shear stress is transferred to outer wall, causing an increment of corrosion rate. The corrosion rate of the outer wall increases with the axial angle.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"16 1","pages":"187 - 196"},"PeriodicalIF":1.1,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89343953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-10DOI: 10.1080/02533839.2022.2161941
Wendgoundi Abdoul Rasmané Savadogo, Chuang-Chieh Lin, Chih-Chieh Hung, Chien-Chang Chen, Z. Liu, Tingting Liu
ABSTRACT With population aging accelerating, people are currently facing a new challenge which is until now unexplored: elderly abuse. According to some statistics provided by World Health Organization, one in six elderlies, aged at least 60 years old, is a victim of physical offense by their relatives and caregivers. Elder people face many types of abuse. This work focuses on the physical abuse which is defined by the infliction of pain on a person. Physical abuse can severely damage a person, sometimes leading to long-term psychological consequences, hospitalization, and death. The contribution to solve this problem is as follows. A dataset is first built by collecting elder abuse videos. Second, the dataset are applied over three different networks: the standard 3D convolutional neural network (3D CNN), the 3D residual convolutional neural network (R3DCNN) and the factorized 3D convolutional neural network based on the residual network ‘R(2 + 1)D CNN’. Lastly, this paper introduces a new preprocessing method called the repeated frames extraction that has been shown to be efficient for action recognition. The project has been concluded with satisfying results with accuracies of 99.21%, 84.37%, and 85% for training, validation, and testing, respectively, on the standard 3D convolutional neural network.
{"title":"A study on constructing an elderly abuse detection system by convolutional neural networks","authors":"Wendgoundi Abdoul Rasmané Savadogo, Chuang-Chieh Lin, Chih-Chieh Hung, Chien-Chang Chen, Z. Liu, Tingting Liu","doi":"10.1080/02533839.2022.2161941","DOIUrl":"https://doi.org/10.1080/02533839.2022.2161941","url":null,"abstract":"ABSTRACT With population aging accelerating, people are currently facing a new challenge which is until now unexplored: elderly abuse. According to some statistics provided by World Health Organization, one in six elderlies, aged at least 60 years old, is a victim of physical offense by their relatives and caregivers. Elder people face many types of abuse. This work focuses on the physical abuse which is defined by the infliction of pain on a person. Physical abuse can severely damage a person, sometimes leading to long-term psychological consequences, hospitalization, and death. The contribution to solve this problem is as follows. A dataset is first built by collecting elder abuse videos. Second, the dataset are applied over three different networks: the standard 3D convolutional neural network (3D CNN), the 3D residual convolutional neural network (R3DCNN) and the factorized 3D convolutional neural network based on the residual network ‘R(2 + 1)D CNN’. Lastly, this paper introduces a new preprocessing method called the repeated frames extraction that has been shown to be efficient for action recognition. The project has been concluded with satisfying results with accuracies of 99.21%, 84.37%, and 85% for training, validation, and testing, respectively, on the standard 3D convolutional neural network.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"70 1","pages":"118 - 127"},"PeriodicalIF":1.1,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77641548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-20DOI: 10.1080/02533839.2022.2141334
Xinyang Li, Jun Zhang, Z. Ren, Weichang Lu
ABSTRACT When processing deep and small holes in optical glass with a diamond core drill, the cutting force is minimal and very variable. It is challenging to measure the cutting force because of the high cutting frequency and small value of the cutting operation. In this study, a piezoelectric three-component dynamometer with excellent axial sensitivity is developed based on the measuring properties of quartz wafers and characteristics of cutting forces during processing. The dynamometer’s four sensors are positioned vertically, which could increase the dynamometer’s axial sensitivity. The dynamometer’s calibration studies were conducted in both static and dynamic modes. The output consists of the dynamometer was verified using a multi-point loading experiment. According to the experimental findings, the dynamometer’s linearity error and repeatability error are both less than 0.5%. Less than 1.6% and 2.9%, respectively, are found in the output error and crosstalk of multi-point loading experiment. The frequency of nature is higher than 1500 Hz. An experiment measuring cutting force was completed lastly. The findings of the experiment confirm the viability of the dynamometer by demonstrating that it performs well and can identify changes in cutting force caused by two distinct cutting tools when operating under various conditions.
{"title":"Development of the piezoelectric dynamometer for brittle material drilling","authors":"Xinyang Li, Jun Zhang, Z. Ren, Weichang Lu","doi":"10.1080/02533839.2022.2141334","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141334","url":null,"abstract":"ABSTRACT When processing deep and small holes in optical glass with a diamond core drill, the cutting force is minimal and very variable. It is challenging to measure the cutting force because of the high cutting frequency and small value of the cutting operation. In this study, a piezoelectric three-component dynamometer with excellent axial sensitivity is developed based on the measuring properties of quartz wafers and characteristics of cutting forces during processing. The dynamometer’s four sensors are positioned vertically, which could increase the dynamometer’s axial sensitivity. The dynamometer’s calibration studies were conducted in both static and dynamic modes. The output consists of the dynamometer was verified using a multi-point loading experiment. According to the experimental findings, the dynamometer’s linearity error and repeatability error are both less than 0.5%. Less than 1.6% and 2.9%, respectively, are found in the output error and crosstalk of multi-point loading experiment. The frequency of nature is higher than 1500 Hz. An experiment measuring cutting force was completed lastly. The findings of the experiment confirm the viability of the dynamometer by demonstrating that it performs well and can identify changes in cutting force caused by two distinct cutting tools when operating under various conditions.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"73 1","pages":"53 - 62"},"PeriodicalIF":1.1,"publicationDate":"2022-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80422381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ABSTRACT Aiming at the low processing efficiency, low daily output, and long processing time of production logistics systems in small and medium-sized automobile enterprises, this study designed a novel production logistics system based on an extensive process. After improving the processing procedures, an extensive process method is adopted to classify product materials and number the process flow. Next, an automatic identification method for single and multi-process process changes is designed, and real-time control and feedback of the production process are realized. Finally, the design and implementation of the system structure and function are completed. The problem of chaotic and disorderly production in the workshop is solved, and the processing efficiency and daily output are improved. The efficiencies of the SVW Limit Arm (SVW) and FAW Limit Arm (FAW) increased by 37.33% and 39.85%, respectively. The daily output of the two products increased by 55.65% and 32.04%.
{"title":"Design and implementation of an extensive-process method for improving the processing efficiency and capacity of the production logistics system","authors":"Heng Ding, Yude Dong, Zhonghang Yuan, Jinbiao Wang, Yuanchang Chen, Zhihao Huang, Haoyu Gao, Suyun Huang","doi":"10.1080/02533839.2022.2141340","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141340","url":null,"abstract":"ABSTRACT Aiming at the low processing efficiency, low daily output, and long processing time of production logistics systems in small and medium-sized automobile enterprises, this study designed a novel production logistics system based on an extensive process. After improving the processing procedures, an extensive process method is adopted to classify product materials and number the process flow. Next, an automatic identification method for single and multi-process process changes is designed, and real-time control and feedback of the production process are realized. Finally, the design and implementation of the system structure and function are completed. The problem of chaotic and disorderly production in the workshop is solved, and the processing efficiency and daily output are improved. The efficiencies of the SVW Limit Arm (SVW) and FAW Limit Arm (FAW) increased by 37.33% and 39.85%, respectively. The daily output of the two products increased by 55.65% and 32.04%.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"20 1","pages":"86 - 105"},"PeriodicalIF":1.1,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82619962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-13DOI: 10.1080/02533839.2022.2141337
Dorra Ben Hassen, Anoire Ben Jdidia, T. Hentati, M. Abbes, M. Haddar
ABSTRACT Facing the increasing rhythm of technological progress we are witnessing with the fast pace of modern life and the growing interest in the environment, machine tools energy estimation has become intrinsic for the manufacturing industries. Basically, during material removal, investigators tend to neglect the cutting forces nonlinearities entailed by the trochoidal trajectories of the cutting edge and the tool run-out despite their effect on the consumed cutting energy. From this perspective, in this research paper, we set forward the Independent Component Analysis (ICA) algorithm as another alternative allowing the estimation of the dynamic cutting forces in the first place, then at a later stage the computation of the estimated cutting energy and power during material removal using the CNC machine tool. Both of the finite element method and the formulation of the equation of motion were applied to validate the estimated cutting forces. The achieved power and energy results were validated through experimental measurements. The obtained experimental results go in good consistency with the numerical ones. Thus, the ICA can be considered as a novel and promising technique in the manufacturing field in terms of the estimation of energy consumption.
{"title":"A novel intelligent reasoning method to estimate the cutting system energy consumption for a sustainable manufacturing","authors":"Dorra Ben Hassen, Anoire Ben Jdidia, T. Hentati, M. Abbes, M. Haddar","doi":"10.1080/02533839.2022.2141337","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141337","url":null,"abstract":"ABSTRACT Facing the increasing rhythm of technological progress we are witnessing with the fast pace of modern life and the growing interest in the environment, machine tools energy estimation has become intrinsic for the manufacturing industries. Basically, during material removal, investigators tend to neglect the cutting forces nonlinearities entailed by the trochoidal trajectories of the cutting edge and the tool run-out despite their effect on the consumed cutting energy. From this perspective, in this research paper, we set forward the Independent Component Analysis (ICA) algorithm as another alternative allowing the estimation of the dynamic cutting forces in the first place, then at a later stage the computation of the estimated cutting energy and power during material removal using the CNC machine tool. Both of the finite element method and the formulation of the equation of motion were applied to validate the estimated cutting forces. The achieved power and energy results were validated through experimental measurements. The obtained experimental results go in good consistency with the numerical ones. Thus, the ICA can be considered as a novel and promising technique in the manufacturing field in terms of the estimation of energy consumption.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"34 1","pages":"74 - 80"},"PeriodicalIF":1.1,"publicationDate":"2022-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78290419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-13DOI: 10.1080/02533839.2022.2141339
Tzu-Ying Chen, Hui-Hsin Chen, T. Teo, P. T. Shih
ABSTRACT This study examined the effectiveness of the red-edge band using RapidEye satellite images for land cover classification. The analysis comprises three schemes for evaluating the effectiveness of the red-edge band: principal component analysis (PCA), vegetation index, and supervised image classification. The factor loadings computed by means of PCA were applied to analyze the importance of each band in the training samples. The analysis results of the factor loadings indicated that the red-edge band performed better than the visible band in the vegetation region. When rice paddy and peanuts were classified using the NDVI_RE, the improvement in accuracy was approximately 7%. Further, the accuracy of rice paddy classification using CMFI_RE was improved by approximately 6%. It can thus be inferred that the red-edge band made a certain contribution to vegetation classification. In land cover classification using reflectance, the accuracy of the support vector machine (SVM) was higher than that of the maximum likelihood classifier (MLC), the iterative self-organizing data analysis technique, and the K-means algorithm. When the red-edge band was included, the overall accuracy improved from 1% to 3%. The results of our experiments indicated that the red-edge band contributed marginally to land cover classification.
{"title":"Effectiveness of the red-edge band of RapidEye in land cover classification","authors":"Tzu-Ying Chen, Hui-Hsin Chen, T. Teo, P. T. Shih","doi":"10.1080/02533839.2022.2141339","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141339","url":null,"abstract":"ABSTRACT This study examined the effectiveness of the red-edge band using RapidEye satellite images for land cover classification. The analysis comprises three schemes for evaluating the effectiveness of the red-edge band: principal component analysis (PCA), vegetation index, and supervised image classification. The factor loadings computed by means of PCA were applied to analyze the importance of each band in the training samples. The analysis results of the factor loadings indicated that the red-edge band performed better than the visible band in the vegetation region. When rice paddy and peanuts were classified using the NDVI_RE, the improvement in accuracy was approximately 7%. Further, the accuracy of rice paddy classification using CMFI_RE was improved by approximately 6%. It can thus be inferred that the red-edge band made a certain contribution to vegetation classification. In land cover classification using reflectance, the accuracy of the support vector machine (SVM) was higher than that of the maximum likelihood classifier (MLC), the iterative self-organizing data analysis technique, and the K-means algorithm. When the red-edge band was included, the overall accuracy improved from 1% to 3%. The results of our experiments indicated that the red-edge band contributed marginally to land cover classification.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"24 1","pages":"21 - 30"},"PeriodicalIF":1.1,"publicationDate":"2022-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83766152","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-13DOI: 10.1080/02533839.2022.2141343
Yu-Fang Liu, C. Chou, GuanRu Peng, Kuan-Ju Chen
ABSTRACT The AISC 341–16 (2016) has loading protocols for beam-to-column moment connections and buckling-restrained braces, but it does not have a loading protocol for columns. Because a first-story column base is expected to form a plastic hinge in a building, a loading protocol for first-story columns in a dual system that comprises moment-resisting frames and buckling-restrained braced frames under varied axial force and lateral drift is required. Moreover, the symmetric cyclic loading protocols of AISC 341 do not include the effect of near-fault earthquakes, which is common in Taiwan. Therefore, the effect of near-fault earthquakes on first-story columns must be considered during the development of a loading protocol for dual systems. In the present study, four dual systems (representing 3-story, 7-story, 15-story, and 25-story frames) are subjected to 11 near-fault earthquake motions, used for developing near-fault loading protocols of first-story columns for the lateral drift and axial load responses.
{"title":"Development of near-fault loading protocols for first-story steel columns in dual systems with BRBs","authors":"Yu-Fang Liu, C. Chou, GuanRu Peng, Kuan-Ju Chen","doi":"10.1080/02533839.2022.2141343","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141343","url":null,"abstract":"ABSTRACT The AISC 341–16 (2016) has loading protocols for beam-to-column moment connections and buckling-restrained braces, but it does not have a loading protocol for columns. Because a first-story column base is expected to form a plastic hinge in a building, a loading protocol for first-story columns in a dual system that comprises moment-resisting frames and buckling-restrained braced frames under varied axial force and lateral drift is required. Moreover, the symmetric cyclic loading protocols of AISC 341 do not include the effect of near-fault earthquakes, which is common in Taiwan. Therefore, the effect of near-fault earthquakes on first-story columns must be considered during the development of a loading protocol for dual systems. In the present study, four dual systems (representing 3-story, 7-story, 15-story, and 25-story frames) are subjected to 11 near-fault earthquake motions, used for developing near-fault loading protocols of first-story columns for the lateral drift and axial load responses.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"55 1","pages":"39 - 52"},"PeriodicalIF":1.1,"publicationDate":"2022-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85697045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-13DOI: 10.1080/02533839.2022.2141336
Ya‐Wen Lin, Wei-Hao Lee, Bo-Yi Kuo, Kae‐Long Lin
ABSTRACT In this study, the silicon source and aluminum source rich in stone mud were extracted, and the best alkali fusion process for different alkali fusion temperatures and alkali agent ratios was determined by the alkali fusion salt method. The surface of the material was grafted by 3-aminopropyltriethoxysilane to obtain an amine grafted functionalized groups MCM-41 material (APTES/MCM-41). The APTES/MCM-41 material was analyzed and water adsorption/desorption experiment was performed. Utilizing stone sludge to obtain APTES/MCM-41, which has a high specific surface area (25.19 m2/g) and, an adjustable pore size and an easy structural surface grafted can use different functional groups for the development of new materials. The 24-h moisture adsorption capacity of the APTES/MCM-41 with 2.5 vol.% amine functional groups was 37.02 g/m2, which conforms to JIS A 1470–1 specifications and far exceeds that of diatomaceous earth and inorganic materials in humidity control coatings (18.6 g/m2). APTES/MCM-41 could be used as an alternative to mechanical dehumidifiers.
摘要本研究提取了富含石泥的硅源和铝源，采用碱熔盐法确定了不同碱熔温度和碱剂配比下的最佳碱熔工艺。在材料表面用3-氨基丙基三乙氧基硅烷接枝，得到胺接枝官能团MCM-41材料(APTES/MCM-41)。对APTES/MCM-41材料进行了分析，并进行了水吸附/解吸实验。利用石泥制备的APTES/MCM-41具有较高的比表面积(25.19 m2/g)，孔径可调，结构表面易于接枝，可以利用不同的官能团开发新材料。含2.5 vol.%胺官能团的APTES/MCM-41的24 h吸湿量为37.02 g/m2，符合JIS A 1470-1规范，远远超过湿度控制涂料中硅藻土和无机材料的吸湿量(18.6 g/m2)。APTES/MCM-41可用作机械除湿机的替代品。
{"title":"Effect of the indoor humidity control characteristics for amine grafted functionalized mesoporous silica nanomaterials","authors":"Ya‐Wen Lin, Wei-Hao Lee, Bo-Yi Kuo, Kae‐Long Lin","doi":"10.1080/02533839.2022.2141336","DOIUrl":"https://doi.org/10.1080/02533839.2022.2141336","url":null,"abstract":"ABSTRACT In this study, the silicon source and aluminum source rich in stone mud were extracted, and the best alkali fusion process for different alkali fusion temperatures and alkali agent ratios was determined by the alkali fusion salt method. The surface of the material was grafted by 3-aminopropyltriethoxysilane to obtain an amine grafted functionalized groups MCM-41 material (APTES/MCM-41). The APTES/MCM-41 material was analyzed and water adsorption/desorption experiment was performed. Utilizing stone sludge to obtain APTES/MCM-41, which has a high specific surface area (25.19 m2/g) and, an adjustable pore size and an easy structural surface grafted can use different functional groups for the development of new materials. The 24-h moisture adsorption capacity of the APTES/MCM-41 with 2.5 vol.% amine functional groups was 37.02 g/m2, which conforms to JIS A 1470–1 specifications and far exceeds that of diatomaceous earth and inorganic materials in humidity control coatings (18.6 g/m2). APTES/MCM-41 could be used as an alternative to mechanical dehumidifiers.","PeriodicalId":17313,"journal":{"name":"Journal of the Chinese Institute of Engineers","volume":"1 1","pages":"11 - 20"},"PeriodicalIF":1.1,"publicationDate":"2022-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83946579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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