International Journal of Material and Mathematical Sciences最新文献_第3页

Synthesis of Titanium Dioxide by Sol-Gel Method and Comparison with Titanium Dioxide Pure 溶胶-凝胶法合成二氧化钛及其与纯二氧化钛的比较

International Journal of Material and Mathematical Sciences Pub Date : 2022-06-30 DOI: 10.34104/ijmms.022.075082

引用次数: 0

Theoretical Results of the Extended Gamma Function and Its Applications 扩展伽玛函数的理论结果及其应用

International Journal of Material and Mathematical Sciences Pub Date : 2022-05-31 DOI: 10.34104/ijmms.022.061074

{"title":"Theoretical Results of the Extended Gamma Function and Its Applications","authors":"","doi":"10.34104/ijmms.022.061074","DOIUrl":"https://doi.org/10.34104/ijmms.022.061074","url":null,"abstract":"In recent years, there has been a lot of interest in the special functions of extended functions and their uses, some of which define the totality of partial analyses, provide useful tools for describing natural phenomena, and are thus more suitable for describing some applicable models. This work illustrates some of the rich theoretical and applied behaviors found in models of special functions, especially expansion-generalized gamma delta, and approaches to generalizing integrals and derivatives more comprehensively, through the weights provided by extended gamma functions. The researcher tried to link all the basic modifications that were obtained previously, and with a summary of the modifications that appeared on the most important special functions related to the extended generalized gamma function and the special functions overlapping with it related to the fractional calculus and more results about the generalized gamma function that occur in the diffraction theory, and some special functions related to fractional functions. Calculus and more results about the extended gamma function that occurs in diffraction theory that occurs in diffraction theory in most applications with full control over diffraction access to functions (of different scale) diffraction of light waves, in traditional diffraction theory.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133015702","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

A Numerical Investigation of the Structural Performance of Double-layered Grid Domes Using Software Packages 双层网架穹顶结构性能的软件包数值研究

International Journal of Material and Mathematical Sciences Pub Date : 2022-03-31 DOI: 10.34104/ijmms.022.035044

{"title":"A Numerical Investigation of the Structural Performance of Double-layered Grid Domes Using Software Packages","authors":"","doi":"10.34104/ijmms.022.035044","DOIUrl":"https://doi.org/10.34104/ijmms.022.035044","url":null,"abstract":"In the 21th-century, large exhibitions halls covered by domes were constructed. Development of domes promoted by using metal structures, which has opened a new era for civil engineers in connection with the decision of maintenance problems of high strength and weight reduction of structures. Grid domes are a preferred structural form of roofs coverage. The paper aims to study the structural performance of double-layered grid domes using SAP2000 (v.14) and ETABS18. Four different types of double-layered grid domes considered in this work were the Schwedler dome (Type 1), three-way grid dome (Type 2), grid dome with different layers (Type 3), and grid dome with hexagonal patterns (Type 4). The configurations of grid domes were generated by Formian program software. The static linear analysis and design of mentioned grid domes were done and different load cases and their combinations were applied according to ASCE 7-10. It was observed that a double-layered grid dome with different layers (Type 3) was the most efficient in structural performance because the density of members per joint gave a very good distribution of axial forces distribution of the whole dome and then minimized the axial force in members and vertical deflections. The present study indicates that further detailed studies of the subject may lead to a more precise understanding of the performance of grid domes subjected to different load cases and this may bring about increased structural safety and serviceability and the economy in cost constructions.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"528 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121788615","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

Solution of Large-Scale Linear Programming Problem by Using Computer Technique 利用计算机技术求解大规模线性规划问题

International Journal of Material and Mathematical Sciences Pub Date : 2022-02-28 DOI: 10.34104/ijmms.022.015034

引用次数: 1

Numerical Solution of Diffusion Equation with Caputo Time Fractional Derivatives Using Finite-Difference Method with Neumann and Robin Boundary Conditions 具有Neumann和Robin边界条件的Caputo时间分数阶导数扩散方程的有限差分法数值解

International Journal of Material and Mathematical Sciences Pub Date : 2022-01-31 DOI: 10.34104/ijmms.022.010014

{"title":"Numerical Solution of Diffusion Equation with Caputo Time Fractional Derivatives Using Finite-Difference Method with Neumann and Robin Boundary Conditions","authors":"","doi":"10.34104/ijmms.022.010014","DOIUrl":"https://doi.org/10.34104/ijmms.022.010014","url":null,"abstract":"Many problems in various branches of science, such as physics, chemistry, and engineering have been recently modeled as fractional ODEs and fractional PDEs. Thus, methods to solve such equations, especially in the nonlinear state, have drawn the attention of many researchers. The most important goal of researchers in solving such equations has been set to provide a solution with the possible minimum error. The fractional PDEs can be generally classified into two main types, spatial-fractional, and time-fractional differential equations. This study was designed to provide a numerical solution for the fractional-time diffusion equation using the finite-difference method with Neumann and Robin boundary conditions. The time fraction derivatives in the concept of Caputo were considered, also the stability and convergence of the proposed numerical scheme have been completely proven and a numerical test was also designed and conducted to assess the efficiency and precision of the proposed method. Eventually, it can be said that based on findings, the present technique can provide accurate results.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131234967","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: 4

Design of 2500 KVA 11/0.4 KV Distribution Substation Based on Load Flow Analysis Using ETAP Software 基于ETAP软件的2500kva 11/0.4 KV变电站潮流分析设计

International Journal of Material and Mathematical Sciences Pub Date : 2021-12-31 DOI: 10.34104/ijmms.021.01330138

Md. Sarowar Hossain Chowdhury, Md.Taslim Uddin, Md. Moniruzzaman, Dipasri Saha, Al Helal, Motasim Billah, Md. Aliuzzaman Sarder

{"title":"Design of 2500 KVA 11/0.4 KV Distribution Substation Based on Load Flow Analysis Using ETAP Software","authors":"Md. Sarowar Hossain Chowdhury, Md.Taslim Uddin, Md. Moniruzzaman, Dipasri Saha, Al Helal, Motasim Billah, Md. Aliuzzaman Sarder","doi":"10.34104/ijmms.021.01330138","DOIUrl":"https://doi.org/10.34104/ijmms.021.01330138","url":null,"abstract":"For the development and growth of economy and social condition of any country, constant supply of good quality electrical power is essential. The main barrier to achieving this goal is the variation of voltage in the network. The load connected in a system varies with time, which causes the variation in the bus voltages. By properly designing and installing the substation, these voltage regulations can be reduced. Load flow analysis provides the steady-state characteristic data and generates reports for voltage magnitude, phase angle, the flow of active and reactive power, losses in the system, etc. Accurate and highly reliable results of Load Flow Analysis (LFA) can be obtained by using ETAP (Electrical Transient Analyzer Program) software. In this research, ETAP software, which utilizes the Adaptive Newton-Raphson method, has been used for performing the load flow analysis of 2500 KVA 11 /.4 KV substation. Actual manufacturer data is utilized for transformers, VCBs, circuit breakers, cables, and other components, whereas computed data is used for loads on the system. The main focus of this study is to improve the voltage regulation and the overall power factor (PF) of the network by inserting capacitor bank also known as the PFI plant in the system. This technique also minimizes the input current and power losses.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"30 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114046068","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

Determination of Piles Bearing Capacity using Empirical Methods and (AllPile 6) Software -Cases studies Portsudan and Khartoum Cities 基于经验方法和(AllPile 6)软件的桩承载力确定——以苏丹和喀土穆为例

International Journal of Material and Mathematical Sciences Pub Date : 2021-10-31 DOI: 10.34104/ijmms.021.01130121

Abusamra A. A. Yousif, Elkhomuini H. M. Ali

{"title":"Determination of Piles Bearing Capacity using Empirical Methods and (AllPile 6) Software -Cases studies Portsudan and Khartoum Cities","authors":"Abusamra A. A. Yousif, Elkhomuini H. M. Ali","doi":"10.34104/ijmms.021.01130121","DOIUrl":"https://doi.org/10.34104/ijmms.021.01130121","url":null,"abstract":"Different methods have been used to determine the pile bearing capacity such as static equations, dynamic equations, empirical methods (EMs), numerical methods, computer software programs, and the pile static load test, these methods were giving different values for pile bearing capacity. In this paper, three empirical methods (Ems) have been selected (Brinch-Hansen, Chin-Kondner, and Decourt) and (AllPile 6) software (AP) has been applied to determine the capacity load of piles for six cases study of drilled concrete piles with a diameter ranging from 800 mm to 1500mm and embedded length ranged 10.5m to 26m. Four of those six piles are located at Portsudan city near the red seacoast and two piles are located in Khartoum city. The results of the pile bearing capacity (PC) calculations obtained using the above-mentioned different methods were compared with results produced by the pile load test. In all six cases study, the settlement of piles was limited, settlement failure was not reached. The results show that the AllPile 6 (AP) and the three mentioned empirical methods (Ems) gave reasonable piles bearing capacity, the (AP) and (BHM) gave the better result than the CKM and DM. While (DM) gave results similar to results determined using the (CKM). However, it was not preferred to use the (CKM) and (DM), unless the failure settlement has occurred in the pile load test.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130334954","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: 3

Some Characterizations of the Extended Beta and Gamma Functions: Properties and Applications 扩展Beta和Gamma函数的一些表征:性质和应用

International Journal of Material and Mathematical Sciences Pub Date : 2021-09-30 DOI: 10.34104/ijmms.021.01010112

Bachioua Lahcene

{"title":"Some Characterizations of the Extended Beta and Gamma Functions: Properties and Applications","authors":"Bachioua Lahcene","doi":"10.34104/ijmms.021.01010112","DOIUrl":"https://doi.org/10.34104/ijmms.021.01010112","url":null,"abstract":"The article represents the elementary and general introduction of some characterizations of the extended gamma and beta Functions and their important properties with various representations. This paper provides reviews of some of the new proposals to extend the form of basic functions and some closed-form representation of more integral functions is described. Some of the relative behaviors of the extended function, the special cases resulting from them when fixing the parameters, the decomposition equation, the integrative representation of the proposed general formula, the correlations related to the proposed formula, the frequency relationships, and the differentiation equation for these basic functions were investigated. We also investigated the asymptotic behavior of some special cases, known formulas, the basic decomposition equation, integral representations, convolutions, recurrence relations, and differentiation formula for these target functions by studying. Applications of these functions have been presented in the evaluation of some reversible Laplace transforms to the complex of definite integrals and the infinite series of related basic functions.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127062164","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

An analysis on the job preference of Jatiya Kabi Kazi Nazrul Islam University Students Jatiya Kabi Kazi Nazrul Islam大学学生就业偏好分析

International Journal of Material and Mathematical Sciences Pub Date : 2021-08-30 DOI: 10.34104/ijmms.021.0850100

Kabiruddine Kazi, N. Islam, Jatiya Kabi, Kazi Nazrul Islam

{"title":"An analysis on the job preference of Jatiya Kabi Kazi Nazrul Islam University Students","authors":"Kabiruddine Kazi, N. Islam, Jatiya Kabi, Kazi Nazrul Islam","doi":"10.34104/ijmms.021.0850100","DOIUrl":"https://doi.org/10.34104/ijmms.021.0850100","url":null,"abstract":"This study examined the job preference among students of different subjects of different faculties in the campus of Jatiya Kabi Kazi Nazrul Islam University, Trishal, Mymensingh. Qualitative variables and variables which are quantitative in nature have been used for this study. We have chosen the topic job preference of students of the different faculties because now-a-days every sector for a job is strict about their rules and regulations. At present time students are frustrated about the lengthy process of jobs and dissimilarities between academic studies and job conditions. The main aims and objectives of this study were to find out information about the job preference of University students in Bangladesh. The research ensured the following objectives; such as Known about the present condition of job preference of Jatiya Kabi Kazi Nazrul Islam University. Found out and identified factors affecting their Job Preference. So the aims and objectives of this research contained various issues. Such as knowing how many students are expected, how many students want to be an entrepreneur, and how many students are going to be in a foreign country for a job. Study of the plan decorated sequentially.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125123680","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

Portfolio Optimization in DSE Using Financial Indicators, LSTM & PyportfolioOpt 基于财务指标、LSTM和PyportfolioOpt的证券市场投资组合优化

International Journal of Material and Mathematical Sciences Pub Date : 2021-07-31 DOI: 10.34104/ijmms.021.074084

Hasan M Sami, Lana Fardous, Debangshu Saha Ruhit

{"title":"Portfolio Optimization in DSE Using Financial Indicators, LSTM & PyportfolioOpt","authors":"Hasan M Sami, Lana Fardous, Debangshu Saha Ruhit","doi":"10.34104/ijmms.021.074084","DOIUrl":"https://doi.org/10.34104/ijmms.021.074084","url":null,"abstract":"Due to its suitable power to anticipate using Non-Linear forecasting methodologies, LSTM (Long Short-Term Memory) has changed the approach to time series prediction several folds. Process compatibilities of technical identifiers and various financial benchmarks that are defining financial decision-making in international markets are affecting Bangladesh Market as well. Issues like MACD and RSI as a technical investigator and financial ratio aspects of EPS and PE Ratio play an important role in the selection of assets in DSE. Given adequate training in line with intended functionality models, RNN has the potential to think through in a similar manner and the probable results are exhibited in this paper. Because of the Gated Structure, which refers to retaining important information and discarding irrelevant information through diminishing gradient and exploding gradient, LSTM has achieved significant advances in nonlinear forecasting that is based on human behavior. In this study, we compared two alternative portfolios that will be dependent on LSTM's future forecasting capabilities in terms of projecting the greatest potential output, which is demonstrated using Portfolio Optimization principles.","PeriodicalId":220610,"journal":{"name":"International Journal of Material and Mathematical Sciences","volume":"91 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128010926","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: 7