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Compression of image using multi-wavelet techniques 使用多小波技术压缩图像
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5768
Saba Abdul-Wahed, M. K. Hussein, H. Ahmed
Digital compression of images is a topic that has appeared in a lot of studies over the past decade to this day. As wavelet transform algorithms advance and procedures of quantization have helped to bypass current compression of image standards such as the JPEG algorithm. To get the highest effectiveness in compression of image transforms of wavelet need filters which gather a desirable character's number i.e., symmetry and orthogonally. Nevertheless, wave design capabilities are restricted due to their ability to have all of such desirable characters at the same time. The multi-wavelet technology removes a few of the restrictions of the wavelet play more than the options of design and thus able to gather all desired Characters of transforming. Wavelet andmulti-wave filter banks are tested on a larger scale with images, providing more useful analysis. Multiple waves indicate energy-compression efficiency (a higher compression ratio usually indicates a higher mean square error, MSE, in the compressed image). Filter bank Characters such as orthogonal and compact support, symmetry, and phase response are important factors that also affect MSE and professed quality of the image. The current work analyzes the multi-wave Characters effect on the performance of compression of images. Four multi-wavelength Characters (GHM, CL, ORT4) were used in this thesis and the compression of image performance of grayscale images was compared with common scalar waves (D4). SPIHT quantification device in stress chart and use of PSNR and subjective quality measures to assess performance. The results in this paper point out those multi wave characteristics that are most important for the compression of images. Moreover, PSNR results and subjective quality show similar performance to the best scalar and multi-waves. The analysis also shows that a programmer based on multi-band conversion significantly improves the perceived image quality.
从过去的十年到今天,图像的数字压缩是一个在许多研究中出现的话题。随着小波变换算法的进步和量化的过程已经帮助绕过当前的图像压缩标准,如JPEG算法。为了使小波图像变换的压缩效果达到最高,需要滤波器能够收集所需的特征数,即对称性和正交性。然而,波浪的设计能力受到限制,因为它们不能同时具有所有这些理想的特性。多小波技术消除了小波发挥的一些限制,而不是设计的选择,从而能够收集所有需要的变换特征。小波和多波滤波器组在更大规模的图像上进行了测试,提供了更有用的分析。多波表示能量压缩效率(较高的压缩比通常表示压缩图像中的均方误差MSE较高)。滤波器组的正交和紧凑支持、对称性和相位响应等特性也是影响图像MSE和图像质量的重要因素。本文主要分析了多波特征对图像压缩性能的影响。本文采用了四种多波长特征(GHM、CL、ORT4),并与普通标量波(D4)对灰度图像的压缩性能进行了比较。SPIHT在应力图中的量化装置,并使用PSNR和主观质量指标来评估性能。本文的研究结果指出了多波特征对图像压缩的重要性。此外,PSNR结果和主观质量表现出与最佳标量波和最佳多波相似的性能。分析还表明,基于多频带转换的编程器显著提高了图像感知质量。
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引用次数: 0
A new bond portfolio optimization model as two-stage stochastic programming problems in U.S. market 一种新的债券投资组合优化模型作为两阶段随机规划问题
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5771
Mohammed Ahmed Alkailany, Mohammed Sadiq Abdalrazzaq
We formulate a new bond portfolio optimization model as a two-stage stochastic programming problem in which a decision maker can optimize the cost of bond portfolio selection while deciding which bonds to sell, which bonds to hold, and which bonds to buy from the market, as well as determine the quantity of additional cash in period t under different scenarios and varying assumptions, The model proved its efficiency by finding the optimal values and giving an investment plan that, it will reduce the cost of the portfolio.
本文建立了一个新的债券投资组合优化模型,该模型是一个两阶段随机规划问题,在不同情景和不同假设条件下,决策者可以优化债券投资组合选择的成本,同时决定从市场上卖出哪些债券、持有哪些债券和购买哪些债券,并确定t时期的额外现金量,通过找到最优值并给出投资计划,证明了模型的有效性。这将降低投资组合的成本。
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引用次数: 0
Performance analysis of local binary pattern and k-nearest neighbor on image classification of fingers leaves 局部二值模式和k近邻在手指叶片图像分类中的性能分析
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5785
A. Ningtyas, E. Nababan, S. Efendi
The K-Nearest Neighbor (KNN) method is often used by researchers for the classification process because it has a relatively great level of accuracy, however it also has a weakness which is sensitive of the noises. This research is aims to introduce an object recognition (identification) system of fingers leaves by classified using the KNN method. To resolves the weaknesses of the KNN method, the researcher has used the Local Binary Pattern (LBP) method to extract features of the leaves. For the comparison in feature extraction, the researcher has used the Gray Level Co-Occurrence Matrix (GLCM) method. The data that were used on this research are papaya leaves and chaya leaves (with the labels such as good and damage forms). In this research, an experimental design has been carried out that was differentiated by according to the comparison (of ratio) between training data and testing data (NI/Np), there were 90 training data and 45 testing data, where the feature extraction method used the 10 of features. Experimentally, it was shown that by using the ratio NI/Np = 67%:33%, the performance or system performance for classifying the images of fingers leaves by using the LBP extraction method showed that training data was obtained the results close to 95% and testing data was obtained the results close to 76%, while by using the GLCM extraction showed that training data was obtained the results close to 83% and testing data was obtained the results close to 58%.
由于k -最近邻(KNN)方法具有较高的分类精度,因此经常被研究人员用于分类过程,但它也存在对噪声敏感的缺点。本研究旨在介绍一种利用KNN方法对手指叶片进行分类的物体识别系统。为了解决KNN方法的不足,研究人员采用了局部二值模式(Local Binary Pattern, LBP)方法来提取叶子的特征。在特征提取的比较方面,研究者采用了灰度共生矩阵(GLCM)方法。在这项研究中使用的数据是木瓜叶和茶叶(有良好和有害形式的标签)。在本研究中,我们进行了一个实验设计,根据训练数据和测试数据的比值(NI/Np)进行区分,有90个训练数据和45个测试数据,其中特征提取方法使用了10个特征。实验表明,在NI/Np = 67%:33%的比例下,LBP提取方法对手指叶片图像进行分类的性能或系统性能表明,训练数据的分类结果接近95%,测试数据的分类结果接近76%,而GLCM提取方法的分类结果表明,训练数据的分类结果接近83%,测试数据的分类结果接近58%。
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引用次数: 1
Estimation of multi-truncated rayleigh and Weibull distributions with application 多截尾瑞利分布和威布尔分布估计及其应用
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/ijnaa.2022.6061
K. Alhasan, K. A. Al-Kadim
In this paper, we introduced the estimation of parameters for distributions that have multi-double truncation by the maximum likelihood method. We depended in the applied study on data of disease of Covid-19 by using one double truncation. Some statistical data were analyzed and unknown parameters and were compared with some distribution.
本文介绍了用极大似然法估计具有多重截断的分布的参数。在应用研究中,我们采用双截尾法对Covid-19疾病资料进行分析。对一些统计数据和未知参数进行了分析,并与一些分布进行了比较。
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引用次数: 0
Comparison between Sinc approximation and differential transform methods for nonlinear Hammerstein integral equations 非线性Hammerstein积分方程的Sinc逼近与微分变换方法的比较
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2020.19923.2111
G. K. Gelian, R. Shirvani, M. A. Araghi
Here, the comparison between Sinc method in combination with double exponential transformations (DE) and approximation by means of differential transform method (DTM) for nonlinear Hammerstein integral equations is considered. Convergence analysis is presented. Detection of effectiveness from various aspects such as run time, different norms, condition number are highlighted and plotted graphically. Results of two schemes are practically well, but in manner of separable kernel, DTM solution is more accurate and so fast.
本文对非线性Hammerstein积分方程的Sinc法与双指数变换法(DE)和微分变换近似法(DTM)进行了比较。给出了收敛性分析。从运行时间、不同规范、条件数等方面突出显示了检测的有效性,并绘制了图形。两种方案的实际结果都很好,但在可分离核的情况下,DTM解决方案更准确,速度更快。
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引用次数: 0
A numerical scheme for solving variable order Caputo-Prabhakar fractional integro-differential equation 求解变阶Caputo-Prabhakar分数阶积分微分方程的数值格式
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2020.21181.2240
Bagher Bagharzadehtvasani, A. Sheikhani, H. Aminikhah
In this paper we apply the Chebyshev polynomials method for the numerical solution of a class of variable-order fractional integro-differential equations with initial conditions. Moreover, a class of variable-order fractional integro-differential equations with fractional derivative of Caputo-Prabhakar sense is considered. The main aim of the Chebyshev polynomials method is to derive four kinds of operational matrices of Chebyshev polynomials. With such operational matrices, an equation is transformed into the products of several dependent matrices, which can also be viewed as the system of linear equations after dispersing the variables. Finally, numerical examples have been presented to demonstrate the accuracy of the proposed method, and the results have  been compared with the exact solution.
本文应用Chebyshev多项式方法求解了一类具有初始条件的变阶分数阶积分微分方程的数值解。此外,考虑了一类具有Caputo-Prabhakar意义的分数阶积分微分方程。切比雪夫多项式方法的主要目的是推导出四种切比雪夫多项式的运算矩阵。利用这样的运算矩阵,将一个方程转化为若干相关矩阵的乘积,也可以看作是分散变量后的线性方程组。最后,通过数值算例验证了所提方法的准确性,并与精确解进行了比较。
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引用次数: 2
The impact of petrochemical industry economic activities on environmental factors using a fuzzy mathematical programming model 利用模糊数学规划模型分析了石油化工行业经济活动对环境因素的影响
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.23377.2525
Abdolkhalegh Vadian, M. Movahedi, A. Abri, M. Lotfi
Due to the nature of activities and processes, the petrochemical industry causes the production of industrial effluents, emissions and wastes that have adverse effects on the environment. The purpose of this study is to investigate the effect of petrochemical economic activities on environmental factors. In this paper, in order to minimize the costs and the amount of pollution caused by the emission of harmful gases, the closed-loop green supply chain model has been used, in which direct and reverse logistics networks have been considered. As a result, a fuzzy mathematical programming model has been developed for when the data are not definitively known. After the demand parameters and the amount of pollution are considered fuzzy, the maximum and bisector mean methods of the area are considered as methods (diffusion) of comparison and ranking of fuzzy definite numbers, and by adding Limitations of these two methods, the model was developed. To solve the model with real data, a plant from the petrochemical industry was selected and the data were prepared for a solution with very good estimates. Finally, the colonial competition algorithm was used to solve it. According to the model, its applicability was shown to reduce the number of environmental pollutants along with the reduction of transportation and waste, and the model for the closed-loop supply chain, which simultaneously considers two direct and inverse logistics networks. It is appropriate.
由于活动和过程的性质,石化工业产生对环境有不利影响的工业废水、排放物和废物。本研究旨在探讨石化经济活动对环境因子的影响。为了使有害气体排放的成本和污染量最小化,本文采用闭环绿色供应链模型,其中考虑了直接和逆向物流网络。因此,在数据不确定的情况下,开发了一个模糊数学规划模型。在考虑需求参数和污染量的模糊性后,将区域的最大值法和平分均值法作为模糊定数比较排序的方法(扩散),并将这两种方法的局限性相加,建立模型。为了用真实的数据求解模型,我们选择了一个石化工业的工厂,并为一个具有很好的估计的解决方案准备了数据。最后,采用群体竞争算法对其进行求解。模型的适用性表明,在减少运输和浪费的同时减少了环境污染物的数量,该模型适用于闭环供应链,同时考虑了两个直接和逆向物流网络。这是合适的。
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引用次数: 0
Evaluating the performance of company risk disclosure on improving the decision-making power of investors using hierarchical analysis technique(AHP) 运用层次分析法评价公司风险披露对提高投资者决策权的作用
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.23520.2553
M. Ahmadi, Farzin Rezaei, N. Hamidi
Researchers have traditionally focused more on the quantity of company information disclosures, but in recent years, the quality of the information disclosed is more important than their quantity. On the other hand, the primary purpose of financial reporting is to provide useful information to stakeholders in relation to the conditions of the company to help investors' economic decisions, which is a function of the quality of the information provided by companies. Therefore, in the present study, by examining the opinions of experts and using the process of hierarchical analysis technique, the weight and importance of risk information disclosure criteria at three different levels (general, company specific and industry specific) were extracted in comparison, then by prioritizing them, Compatibility rate was calculated. Using statistical methods of two-way analysis of variance within the subject, it was concluded that there is no significant difference between the effect of risk information disclosure criteria on corporate investors' decision making.
传统上,研究人员更多地关注公司信息披露的数量,但近年来,信息披露的质量比数量更重要。另一方面,财务报告的主要目的是向利益相关者提供有关公司状况的有用信息,以帮助投资者进行经济决策,这是公司提供的信息质量的函数。因此,在本研究中,通过考察专家意见,运用层次分析法的过程,在比较中提取了三个不同层次(一般、公司特定和行业特定)的风险信息披露准则的权重和重要性,并对其进行优先级排序,计算出相容率。采用主体内双向方差分析的统计方法,得出风险信息披露准则对企业投资者决策的影响不存在显著差异。
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引用次数: 0
Homoclinic Orbits and Localized Solutions in Discrete Nonlinear Schrodinger Equation with Long-Range Interaction 具有远程相互作用的离散非线性薛定谔方程的同斜轨道和定域解
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2021.23619.2588
Allal Mehazzem, Mohamed Saleh Abdelouahab, K. Haouam
In this paper, we use the homoclinic orbit approach without using small perturbations to prove the existence of soliton solutions of the discrete nonlinear Schrodinger equations with long-range interaction by employing the properties of the symmetries of reversible planar maps. Moreover, the long-range interaction by a potential proportional to $1/l^{1+alpha} $ with fractional $alpha < 1 $ and $l $ as natural number.
本文利用可逆平面映射对称性的性质,利用不使用小扰动的同斜轨道方法,证明了具有远距离相互作用的离散非线性薛定谔方程孤子解的存在性。此外,远程相互作用由一个与$1/l^{1+alpha} $成比例的势,分数$alpha < 1 $, $l $为自然数。
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引用次数: 0
Generalized Euler and Runge-Kutta methods for solving classes of fractional ordinary differential equations 求解一类分数阶常微分方程的广义欧拉和龙格-库塔方法
Q4 Mathematics Pub Date : 2022-01-01 DOI: 10.22075/IJNAA.2022.5788
M. Mechee, S. H. Aidi
A third-order fractional ordinary differential equation (FrODE) is very important in the mathematical modelling of physical problems. Generally, the third-order ODE is solved by converting the differential equation to a system of first-order ODEs. However, it is a lot more efficient in terms of accuracy, a number of function evaluations as well as computational time if the problem can be solved directly using numerical methods. In this paper, we are focused on the derivation of the direct numerical methods which are one, two and three-stage methods for solving third-order FrODEs. The RKD methods with two- and three stages for solving third-order ODEs are adapted for solving special third-order FrDEs. Numerical examples have been evaluated to show the effectiveness of the new methods compared with the analytical method. Numerical experiments are carried out to verify the accuracy and efficiency of the proposed methods. Applications of proposed methods are also presented which yield impressive results for the proposed and modified methods. The numerical solutions of the test problems using proposed methods agree well with the analytical solutions. From the numerical results obtained using proposed methods, we can conclude that the proposed methods in which derived or modified in this paper are very efficient.
三阶分数阶常微分方程(FrODE)在物理问题的数学建模中是非常重要的。通常,通过将微分方程转化为一阶ODE系统来求解三阶ODE。然而,如果问题可以直接使用数值方法解决,则在精度,许多函数评估以及计算时间方面效率更高。本文重点推导了求解三阶frode的直接数值方法,即一阶法、二阶法和三阶法。求解三阶微分方程的二阶和三阶RKD方法适用于求解特殊的三阶微分方程。数值算例表明了新方法与解析方法的有效性。数值实验验证了所提方法的准确性和有效性。本文还介绍了所提出的方法的应用,并对所提出的方法和改进的方法产生了令人印象深刻的结果。所提方法的数值解与解析解吻合较好。从所提出的方法得到的数值结果可以看出,本文所推导或修正的方法是非常有效的。
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引用次数: 1
期刊
International Journal of Nonlinear Analysis and Applications
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