Periodico Di Mineralogia最新文献

{"title":"Numerical Investigation of Forced Convective Heat Transfer and Fluid Flow Analysis in a Double Lid Driven Staggered Cavity With Various Blocks","authors":"M. Gurunathan","doi":"10.37896/pd91.4/91421","DOIUrl":"https://doi.org/10.37896/pd91.4/91421","url":null,"abstract":"The investigation reported in this project is dealt about the Steady-state laminar flow and heat transfer in a lid-driven staggered cavity with two heated blocks. Based on the aspect ratio (AR = H / L = 1, H / L = 2, H / L = 1 (circle)), three different block shapes for numerical experiments are introduced. Huge blocks with no slip or static wall conditions are considered and placed in the geometric center of the cavity. The simulation is run for Reynolds numbers 100, 200, 500, 1000, and 2000 and the block temperature is 573K. The top lid moves to the right and the bottom lid moves to the left. Both are considered the same speed.. It was found that the dynamics and structure of the primary vortex and the angular vortex are strongly influenced by the Reynolds number. Studies clearly show that as the Reynolds number increases, the total drag coefficient decreases. The study reveals the important flow physics such as flow separation, boundary-layer and recirculation. The results will be beneficial for similar situation occur in many industrial problems. shows a schematic diagram of a zigzag cavity driven by a double-sided lid. Here, both the top and bottom lids move at the same speed, the top wall moves parallel forward, and the bottom wall moves in the next direction. antiparallel backward direction. The two block is placed at the center of diagonally symmetric cavity. Blocks are maintained at uniform temperature. The top lid is assumed to move at a prescribed positive horizontal velocity value and the bottom lid moves with a negative velocity with a magnitude equal to the velocity of the top lid. while the left and right are adiabatic.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"39 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85818729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigating the Effect of Fsw Process Parameters on Microstructure, Residual Stress, Hardness and Tensile Strength of Welding Dissimilar Al Alloy","authors":"","doi":"10.37896/pd91.4/91467","DOIUrl":"https://doi.org/10.37896/pd91.4/91467","url":null,"abstract":"","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"32 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89188160","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"BIR-CAT Optimization Technique for Automatic Segmentation and Classification of Brain Tumours on Pre- and Post-Operative MRI","authors":"K. V. Shiny, N. Sugitha","doi":"10.37896/pd91.4/91471","DOIUrl":"https://doi.org/10.37896/pd91.4/91471","url":null,"abstract":"The main goal of this research is to find brain tumours by use MRI scan. After that, to find all the abnormalities in the brain and put them into groups. It is a challenging task to detect and segment the tumour tissues and other tissues from the brain. The MRI is initially fed into the preprocessing system and is then segmented using the Region Growing segmentation algorithm. This will produce the segmented area and is then forwarded for classification. In the classification step, the Bir-Cat optimization algorithm is used. This is a deep learning idea that trains the neural network using a Deep Belief Network. The Bird-Swarm algorithm and the Cat-Swarm algorithm are both parts of the Bir-Cat algorithm. This will give the classified tumour tissues and also classify the different types of tissues or abnormalities in a brain tumour. The extended idea is the segmentation and classification of a brain tumour after surgery. This includes all of the image processing steps that were done for the MRI before surgery. Finally, the segmented results of the pre-operative MRI and the post-operative MRI were compared to see if any pixels had changed. These both identify the post-surgery new tumour that has developed and demonstrates how well the procedure was performed.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"92 2 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89854496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of Mechanical and Corrosion behaviour of AZ61 Mg nanocomposites with boron carbide particles","authors":"","doi":"10.37896/pd91.3/9132","DOIUrl":"https://doi.org/10.37896/pd91.3/9132","url":null,"abstract":"","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"30 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83382504","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Parametric Analysis on Non-Lubricated Wear Over Hybrid Aluminium Metal Matrix Composite Material by Rsm","authors":"R. K. Kumaar, K. Vinoth, M. Kavitha","doi":"10.37896/pd91.4/91416","DOIUrl":"https://doi.org/10.37896/pd91.4/91416","url":null,"abstract":"The primary focus of this research was to investigate the parameters that influence the wear rate of a hybrid composite material. The parameters used are the percentages of two reinforcements used, applied weight, and sliding velocity. The methodology involves the production of the hybrid composite utilizing the stir casting process. The ASTM G99 standard is used to evaluate the produced composite materials utilizing a pin-on-disc equipment. The testing settings include changing weights of 10 [N], 20 [N], and 30 [N], as well as sliding velocities of 1 [m.s -1 ], 2 [m.s -1 ], and 3 [m.s -1 ] using RSM technique. The obtained results of wear rate for the composite materials were analyzed for the most influencing parameter and it was found that the sliding velocity is the major factor influencing the wear rate followed by applied load. The weight percentage of cenosphere and weight percentage of MoS 2 are least influencing factors in linear terms and the applied load factor was the only factor having influence in square term also. Interaction plot shows the combinational effect of the weight percentage of cenosphere - weight percentage of MoS 2 , weight percentage of MoS 2 – applied load, weight percentage of MoS 2 – sliding velocity and applied load – sliding velocity majorly influencing the wear rate. The weight percentage of cenosphere and MoS 2 found to have a significant influence on the wear behaviour of the composite material even though their percentage contribution is relatively low and the wear rate decreases as the weight percentage of cenosphere and MoS 2 tends to increase.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"54 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85759532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental Investigation on Heat Pipe-Assisted Cooling During Hard Turning of AISI 4340 using HSN2 Coated Inserts","authors":"","doi":"10.37896/pd91.4/91430","DOIUrl":"https://doi.org/10.37896/pd91.4/91430","url":null,"abstract":"","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"4 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80275432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Investigation on Antenna Substrate Materials for the Design of 5X20 Massive MIMO Antennas","authors":"M. Ramya, G. B. Murugan, C. Arunachalaperumal","doi":"10.37896/pd91.4/91428","DOIUrl":"https://doi.org/10.37896/pd91.4/91428","url":null,"abstract":"— The wireless technology resides at 5G global standard wireless communication. This standard enhances the network capacity, network coverage, lower latency and enormous bandwidth by increasing the operating frequencies of the communication standards. 5G standard promises to deliver a speed of 500 times faster than 4G by utilizing the technology such as massive MIMO, small cell, beam forming and full duplex technology. The higher operating frequencies leads to the path loss constrains and the device compact also one of the issues arises in the handheld wireless communication devices or massive machine type communications. To overcome these issues an effective antenna has to be designed for the new generation wireless standards. Most commonly used handheld communication devices, IoT devices and massive machine type communication uses microstrip patch antenna as radiating elements and the substrate materials associated with these antennas plays a key role for the development of an antenna. In this paper, investigations on six different substrate materials were done for the design of MIMO antenna. A rectangular microstrip antenna was designed under the operating frequency of 28 GHz using six different substrate materials such as Taconic TLY-5A, Arlon Diclad 880, Rogers Utralam, Rogers RO 3003, Rogers RO 3035 and Arlon AD 450. From this analysis an Arlon Diclad 880 substrate material is best suited for the developement of an array. An array of 10 elements and 100 elements microstrip patch antenna has been designed and simulated using CST microwave studio suite. A planar microstrip antenna array (2X5) was designed using Arlon Diclad 880 substrate material having the dielectric constant of 2.2 and a thickness of 0.127 mm, it gives a maximum gain of 13.74 dBi at 27.9 GHz, directivity of 14.29 dBi and the overall dimensions of 10×22.5×0.127 mm where as 5X20 massive MIMO antenna array gives a maximum gain of 23.66 dBi at 28.1 GHz, directivity of 24.15 dBi and the overall dimensions of 145×22.5×0.127 mm. Further slots will be introduced in the antenna for even more size reduction in the conventional microstrip patch antenna for the 5G wireless handheld communication devices and the IoT applications. Wireless Technology, Massive MIMO Antenna, 5X20 Antenna elements.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"5 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80197340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Computation of Real and Complex Valued Signal in Parallel Pipeline FFT Architectures","authors":"","doi":"10.37896/pd91.4/91466","DOIUrl":"https://doi.org/10.37896/pd91.4/91466","url":null,"abstract":"","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"31 2","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72567473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Innovative Study on the Performance of Banyan Prop Root Fiber Reinforced Polymer Concrete","authors":"","doi":"10.37896/pd91.4/91434","DOIUrl":"https://doi.org/10.37896/pd91.4/91434","url":null,"abstract":"This study focuses on the use of explicit banyan fiber to predict the behavior of fiber-reinforced polymer (FRP)and composite grid reinforced concrete beams subjected to four-point bending. The load-deflection characteristics obtained from the simulations show good correlation with the experimental data. The fibre reinforced concrete was made with the same percentage of concrete materials as before, but with a banyan prop root fibre content of 1%, 2%, 3%, 4%, and 5% by weight of cement taken. The main aim of the research was to use sustainable materials from natural occurrence or the materials can be prepared by own was preferred. The natural fibers obtained from banyan prop roots was extracted and it is utilized for the production of fiber reinforced concrete. The recent trends in any field of work is sustainability and this can be achieved by the production of FRPC. Since the fibers used in FRC lags in durability and this property can be enhanced with the application of polymer resulting in the production of FRPC. In order to study the durability properties of polymer concrete (PC), Fiber reinforced concrete (FRC) and Fiber reinforced polymer concrete (FRPC), these composites are immersed in acid and sulphate solutions and its compressive strength after certain period of immersion was computed. The use of fiber and polymer in concrete thus reduces the effect of corrosion in reinforced cement concrete structures. Hence it is essential to study the effect of polymer and fiber in concrete in the corrosion resistance of steel in concrete.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"146 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78503856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Graph Ontology Based IAFCM Model for Itemset Mining in Transactional Database: An Optimized Fuzzy Framework","authors":"Dr. P. Perumal, Dr. P. Amudhavalli, DR P Sherubha","doi":"10.37896/pd91.4/91422","DOIUrl":"https://doi.org/10.37896/pd91.4/91422","url":null,"abstract":"HUIM (High Utility Itemset Mining) is one of the most analyzed data mining activities. Product suggestion, e-learning, bioinformatics, text mining, market basket analysis, and web click stream analysis are few of the areas where it can be used. Cost savings, greater competitive advantage, and increased revenue are the advantages gained by pattern analysis. However, because HUIM approaches do not examine the correlation of retrieved patterns, they may uncover false patterns. As a result, a number of technique for mining related HUIs have been presented. These algorithms still have issues with computational cost, both in conditions of period and memory usage. As a result, a method for mining weighted temporal patterns is proposed. The suggested method begins by preprocessing time series-based data into fuzzy itemsets. These are fed into the Improved Adaptive Fuzzy C Means (IAFCM) technique, which is a hybrid of the FCM clustering method and the Graph based Ant Colony Optimization (GACO) technique. The proposed IAFCM technique accomplishes two goals: IAFCM clustering and data reduction in FCM clusters, and ii) optimal itemet placement in clusters using GACO. Using GACO, the suggested technique produces high-quality clusters. On these clusters, weighted sequential pattern mining is used to find the most effective sequential patterns, which take into account knowledge of patterns with low frequency and high weight in a repository that is updated over time. The results of this method show that when compared to other traditional methodologies, the IAFCM with GACO improves execution time. Furthermore, it improves the data representation process by increasing accuracy while using less memory.","PeriodicalId":20006,"journal":{"name":"Periodico Di Mineralogia","volume":"43 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88967467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}