International Journal of Engineering Science Technologies最新文献

{"title":"DETECTING OUTLIER IN THE MULTIVARIATE DISTRIBUTION USING PRINCIPAL COMPONENTS","authors":"Aldwin M. Teves","doi":"10.29121/ijoest.v7.i2.2023.488","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.488","url":null,"abstract":"It is crucial to make inference out of the data at hand. It makes sense to discard spurious observations prior to application of statistical analysis. This study advances a procedure of determining outliers based from the principal components of the original variables. These variables are sorted and given weights based on the magnitude of their inner product with the principal components formulated from the centered and scaled variables. The weights are the corresponding variances explained by the principal components. The measure of proximity among observations is proportionate to the variance (eigenvalues) associated with the principal components. The methodology defines two distinct subintervals where the suspected outliers settle in one of these subintervals based on the proximity measures δo. On the merit of simulated data, the procedure detected 100 percent when the outliers are coming from distinct distribution. On the other hand, the procedure detected 98.7 per cent when the distribution of outliers have equal variance-covariance matrix with the outlier-free distribution and a slight difference in the vector of means.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122884422","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}

{"title":"THE MATHEMATICAL ANALYSIS AND IMPROVEMENT OF MATRIX ALGORITHM FOR FEEDER FAULT LOCATION BASED ON FTU IN THE DISTRIBUTION NETWORK","authors":"Blaise Kevine Lenz Soronga, Shayan Zafar, Shaowu Shi, Binda Yumba Benjamin","doi":"10.29121/ijoest.v7.i2.2023.491","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.491","url":null,"abstract":"The mathematical analysis and improvement of matrix algorithm based on FTU has been proposed to solve fault location problem in complex multi-source and multi fault distribution networks of power system. Based on the structural characteristics of the distribution system, a description matrix D is established by assuming the power sources and a positive direction and it derived from the correlation between the positive direction and different power lines. As a function of the fault current direction transmitted by the terminal power supply unit which is our feeder terminal unit (FTU), the fault information vector F is set up. By combining the description matrix D and searching for non-zero elements in the fault information vector, the fault location vector is discovered according to the fault location criteria. During the observation of the elements in the fault location vector, by analyzing we immediately found the location of the defect area. This algorithm can solve problems that cannot be completely solved by other algorithms, such as power terminal failures, ring network failures, and multi-source failures. This method does not require matrix multiplication or normalization. The widespread use of distributed generation (DG) has made the distribution network more complex, and it leads to the failure of the traditional matrix algorithm. Therefore, the matrix algorithm is further improved to adapt the complex characteristics of DG. Considering the accuracy, we avoid random search operations by filtering fault candidate scenarios based on fault confidence and Each algorithm run 100 times in a loop, and the average time taken for a single run is used as a measure of the computational efficiency of the algorithm. The matrix algorithm utilizes the information uploaded by FTU to SCADA to create network description matrix, fault information matrix, which are then used to obtain the fault judgment matrix for fault location and isolation and it proves that the algorithm judgment is effective.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"350 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123419548","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}

{"title":"DESIGN AND CONSTRUCTION OF 625KVAR POWER FACTOR CORRECTING PANEL","authors":"Micheal Olusolade, F. Bello, Tope Akinbobola Akinseye, John Alesanmi Faweya","doi":"10.29121/ijoest.v7.i2.2023.465","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.465","url":null,"abstract":"In industry, most of the loads are inductive in nature which results in lagging power factor. This is the same for some commercial centers and homes with modern appliances, thus resulting in loss and wastage of energy leading to high power bills and heavy penalties from electricity boards in some developed countries. This electrical feature when low below certain values, below unity brings about low voltages, large copper loss, poor efficiency and hotness of the conductor used in the circuit. Power factor is the ratio of real or active power to apparent power. It is unit less. At unit (1) power factor, active and apparent power are equal. At this level, the reactive power is equal to zero and current is at minimum value. This 625kVar power factor correcting panel operates both manually and automatically for active load of 500kW at 0.8 power factors to bring it to 0.99 power factors. There are many ways to achieve this, but this project is employing only the use of capacitors and six capacitors were used. Conclusively, this design was successfully executed, and it is an indication that capacitors can be used to meet different initial and corrected power factor angle as losses were minimized hence reducing heat in the transformer, cables, and switch gear of the power system.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"191 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114104743","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}

{"title":"CRYPTOGRAPHIC METHOD TO ENHANCE DATA SECURITY USING RSA ALGORITHM AND MELLIN TRANSFORM","authors":"Akash Thakkar, Ravi Gor","doi":"10.29121/ijoest.v7.i2.2023.490","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.490","url":null,"abstract":"Cryptography is the technique of using mathematical algorithms to encrypt and decrypt the information. The process of converting plaintext to ciphertext is known as encryption, whereas the process of converting ciphertext to plaintext is known as decryption. Encryption and decryption methods based on Mellin Transform are unable to provide more security while transmitting the information. RSA algorithm is an Asymmetric key cryptography algorithm. The purpose of this study is to present a cryptographic method that uses the RSA algorithm and Mellin Transform to improve communication security.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130288376","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}

{"title":"THEORETICAL STUDY OF NEW CANDIDATE ORGANIC MATERIALS FOR PHOTOVOLTAIC APPLICATIONS","authors":"Anass El Karkri, Imane El mhamedi, Zakaria El malki, M. Bouachrine","doi":"10.29121/ijoest.v7.i2.2023.485","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.485","url":null,"abstract":"Our work consists of a theoretical prediction, through DFT and TD-DFT methods, of the electronic and optical properties of six conjugated organic compounds used as electron donor materials in BHJ solar cells, of which PCBM is the acceptor material. This study is necessary to discuss the effect of substituents (donor units) on the different properties of these compounds, and to predict promising materials in organic solar cells using the AMPS-1D simulation software. The results obtained show that all the molecules have good geometric, electronic and optical properties, thus showing an increase in the power conversion efficiency of photovoltaic cells based on these materials, which reaches a value of 17% for the molecule P-Eth-TEdotT-A.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128166404","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}

{"title":"CAVITATION FUSION BY ENERGY-INTENSIVE MULTIFUNCTION CAVITATION IN A STRONG MAGNETIC FIELD WITH LASER LIGHT EXCITATION","authors":"T. Yoshimura","doi":"10.29121/ijoest.v7.i2.2023.492","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.492","url":null,"abstract":"This paper introduces an experimental apparatus capable of producing cavitation fusion based on laser-assisted high-magnetic-field energy-intensive multifunction cavitation. Combining water jet, ultrasonic and magnetic field energy sources has been shown to increase the luminescence intensity in this system such that the threshold required for deuterium-tritium fusion can be exceeded. The incorporation of a laser provides a further improvement in emission intensity based on an increase in the internal temperature of bubbles. Multiphoton excitation induced by the laser irradiation raises the pressure generated during collisions between bubbles. Consequently, the probability of achieving cavitation fusion is greatly enhanced.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123616053","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}

{"title":"HYBRID SCHEMES BASED ON WAVELET TRANSFORM AND CONVOLUTIONAL AUTO-ENCODER FOR IMAGE COMPRESSION","authors":"H. Chakib, N. Idrissi, Oussama Jannani","doi":"10.29121/ijoest.v7.i2.2023.479","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.479","url":null,"abstract":"In recent years, image compression techniques have received a lot of attention from researchers as the number of images at hand keep growing. Digital Wavelet Transform is one of them that has been utilized in a wide range of applications and has shown its efficiency in image compression field. Moreover, used with other various approaches, this compression technique has proven its ability to compress images at high compression ratios while maintaining good visual image quality. Indeed, works presented in this paper deal with mixture between Deep Learning algorithms and Wavelets Transformation approach that we implement in different color spaces. In fact, we investigate RGB and Luminance/Chrominance YCbCr color spaces to develop three image compression models based on Convolutional Auto-Encoder (CAE). In order to evaluate the models’ performances, we used 24 raw images taken from Kodak database and applied the approaches on every one of them and compared achieved experimental results with those obtained using standard compression method. We draw this comparison in terms of performance parameters: Structural Similarity Index Metrix SSIM, Peak Signal to Noise Ratio PSNR and Mean Square Error MSE. Reached results indicates that with proposed schemes we gain significate improvement in distortion metrics over traditional image compression method especially SSIM parameter and we managed to reduce MSE values over than 50%. In addition, proposed schemes output images with high visual quality where details and textures are clear and distinguishable.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123931580","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}

{"title":"NATION BRAND ARCHITECTURE- A REALITY OR REVERIE FOR AFRICAN NATIONS: THE CASE OF BOTSWANA","authors":"Tshepo Maswabi, Jane Monyake, P. Mburu","doi":"10.29121/ijoest.v7.i2.2023.467","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.467","url":null,"abstract":"Nation brand architecture gives a ‘sense of mission’ which can help unify key players, concentrate resources, increase efficiency, and create synergies in customer attraction Joao (2018). However, what seemingly works for product/ corporate brands appears to be more of a brown study for nation branding. Adoption of nation brand architecture is gaining traction in Western nations. Many countries in Africa such as Botswana seem not to be consciously employing this seemingly beneficial concept.This paper therefore explores the extent to which Botswana; an African nation has adopted this concept. It also focuses on how the nation embeds and applies the existing national identities such as national colours (reflected in the nation flag), symbols, animals, and plants in the brand architecture.The study employs a content analysis approach that investigates the nation against four overarching themes of brand architecture. Using the Dinnie (2008) Nation Brand Architecture Model (NBAR), the paper draws valuable insights from an analysis of brand architecture concepts as well as the current adopted or default brand architecture for the nation of Botswana. The paper forms the initial sequel of papers on Botswana nation brand architecture model. The initial findings present a tenuous understanding of the adopted architecture reflective of both the endorsed and branded house architecture.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131438890","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}

{"title":"ISOMORPHISM OF STANDARD TO DESIGN ADJUSTED, RESOURCES UTILIZATION EFFICIENCY AS A NEXUS FOR BUILDABILITY EVALUATION","authors":"Babatunde Adeniyi Yusuf, A. Anjonrin-Ohu","doi":"10.29121/ijoest.v7.i2.2023.471","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.471","url":null,"abstract":"In spite of the importance of the concept of design buildability, it has found little application in construction management because the concept is yet to be validly measured. It is for this purpose that this study aims at developing an evaluation technique that is mathematically valid, to generate a metric for measuring buildability which does not only preserve transitive order but that also measures distance. Buildability was modeled into the Resources Utilization Efficiency (RUE) equation as a disturbance (","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126562179","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}

{"title":"IDENTIFICATION OF THE DISCRIMINATING MOLECULAR PROFILES OF FIVE MAIN RUBBER TREE (HEVEA BRASILIENSIS) GENOTYPES RECOMMENDED IN IVORY COAST","authors":"H. M. Kouakou, Angeline. A. E. Elabo, I. J. Fofana, N. D. Pokou, K. Brou, Nafan, Diarrassouba, S. M. Yao, Arnaud Freddy Yapi, Y. Gnagne, S. Obouayeba","doi":"10.29121/ijoest.v7.i2.2023.463","DOIUrl":"https://doi.org/10.29121/ijoest.v7.i2.2023.463","url":null,"abstract":"This study was undertaken to identify the microsatellite markers characteristic of rubber tree genotypes, producers of natural rubber. Twelve pairs of microsatellite primers obtained from expressed sequence tags (EST), available in the GENBANK genomic bank, were used to screen a sample of 40 individuals, that is, 8 per genotype. These microsatellite loci are di, tri or tetranucleotides, patterned perfect, imperfect, compound or complex. This study on the GT1, PB217, IRCA41, IRCA230 and IRCA331 genotypes, recommended in Ivory Coast, showed that it is possible to characterize them by using three microsatellite loci, such as Hb36, Hb43 and Hb110. The abundance of repeats observed in the genome of rubber tree clones was similar to those reported in other works. These can be exploited and used in rubber tree clonal improvement programs.","PeriodicalId":331301,"journal":{"name":"International Journal of Engineering Science Technologies","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130238929","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}