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A Supplier Selection Decision-Making Approach for Complex Product Development Based on Hesitant Fuzzy Information 基于犹豫模糊信息的复杂产品供应商选择决策方法
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-25 DOI: 10.3390/axioms12111006
Baodong Li, Jiafu Su, Boqiao Yuan, Lvcheng Li, Yihuan Zhao, Zhidan Qin, Li Qian
During the development process of complex products, selecting the best desirable alternative supplier is a challenge since an improperly selected alternative may cause losing capacity and increasing the cycle time and cost of development for a company. For this multiple-attribute decision-making problem of supplier selection, in this paper, a supplier selection problem in which the decision data are hesitant fuzzy information and the attribute weight is unknown in complex product development is investigated, and a supplier selection decision-making approach based on hesitant fuzzy information is proposed. Firstly, a bidirectional projection based on hesitant fuzzy information is established, and then the measurement equation for the degree of closeness is improved. Further, an attribute weight determination model which minimizes the projection total deviation for the hesitant fuzzy elements is constructed. By solving this model, scientific and reasonable attribute weights are provided. Subsequently, an illustrative example is employed to not only give the ranking result of alternative suppliers but also demonstrate the validity and feasibility of the developed approach. Meanwhile, sensitivity analysis and comparative analysis are put forward to illustrate the stability of the given final ranking result and the advantages and reliability of the constructed method. For alternative or strategy selection, this proposed approach can be used as a decision-making means when uncertainties are inherent.
在复杂产品的开发过程中,选择最理想的替代供应商是一个挑战,因为选择不当可能会导致公司丧失产能,增加开发周期时间和成本。针对供应商选择的多属性决策问题,研究了复杂产品开发中决策数据为犹豫模糊信息且属性权重未知的供应商选择问题,提出了一种基于犹豫模糊信息的供应商选择决策方法。首先建立了基于犹豫模糊信息的双向投影,然后改进了贴近度的度量方程;在此基础上,构造了模糊犹豫元素投影总偏差最小的属性权重确定模型。通过求解该模型,给出了科学合理的属性权重。最后,通过一个算例给出了备选供应商的排序结果,并验证了该方法的有效性和可行性。同时,通过灵敏度分析和对比分析来说明所给出的最终排序结果的稳定性以及所构建方法的优越性和可靠性。对于备选方案或策略选择,该方法可作为固有不确定性的决策手段。
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引用次数: 0
An Improved Intuitionistic Fuzzy Decision-Theoretic Rough Set Model and Its Application 改进的直觉模糊决策理论粗糙集模型及其应用
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-24 DOI: 10.3390/axioms12111003
Wajid Ali, Tanzeela Shaheen, Hamza Toor, Tmader Alballa, Alhanouf Alburaikan, Hamiden Abd El-Wahed Khalifa
The Decision-Theoretic Rough Set model stands as a compelling advancement in the realm of rough sets, offering a broader scope of applicability. This approach, deeply rooted in Bayesian theory, contributes significantly to delineating regions of minimal risk. Within the Decision-Theoretic Rough Set paradigm, the universal set undergoes a tripartite division, where distinct regions emerge and losses are intelligently distributed through the utilization of membership functions. This research endeavors to present an enhanced and more encompassing iteration of the Decision-Theoretic Rough Set framework. Our work culminates in the creation of the Generalized Intuitionistic Decision-Theoretic Rough Set (GI-DTRS), a fusion that melds the principles of Decision-Theoretic Rough Sets and intuitionistic fuzzy sets. Notably, this synthesis bridges the gaps that exist within the conventional approach. The innovation lies in the incorporation of an error function tailored to the hesitancy grade inherent in intuitionistic fuzzy sets. This integration harmonizes seamlessly with the contours of the membership function. Furthermore, our methodology deviates from established norms by constructing similarity classes based on similarity measures, as opposed to relying on equivalence classes. This shift holds particular relevance in the context of aggregating information systems, effectively circumventing the challenges associated with the process. To demonstrate the practical efficacy of our proposed approach, we delve into a concrete experiment within the information technology domain. Through this empirical exploration, the real-world utility of our approach becomes vividly apparent. Additionally, a comprehensive comparative analysis is undertaken, juxtaposing our approach against existing techniques for aggregation and decision modeling. The culmination of our efforts is a well-rounded article, punctuated by the insights, recommendations, and future directions delineated by the authors.
决策理论粗糙集模型是粗糙集领域的一个引人注目的进步,提供了更广泛的适用性。这种方法深深植根于贝叶斯理论,对描绘最小风险区域有重要贡献。在决策理论粗糙集范式中,通用集经历了三方划分,其中出现了不同的区域,并且通过利用隶属函数智能地分配损失。本研究努力提出决策理论粗糙集框架的增强和更全面的迭代。我们的工作最终创造了广义直觉决策理论粗糙集(GI-DTRS),它融合了决策理论粗糙集和直觉模糊集的原理。值得注意的是,这种综合弥补了传统方法中存在的差距。该方法的创新之处在于将误差函数与直觉模糊集固有的犹豫等级相结合。这种集成与隶属函数的轮廓无缝协调。此外,我们的方法通过基于相似性度量构建相似类来偏离既定规范,而不是依赖等价类。这种转变在聚合信息系统的背景下具有特别的相关性,有效地规避了与该过程相关的挑战。为了证明我们提出的方法的实际功效,我们深入研究了信息技术领域的具体实验。通过这种实证探索,我们的方法在现实世界中的效用变得生动明显。此外,还进行了全面的比较分析,将我们的方法与现有的聚合和决策建模技术并列。我们努力的最终成果是一篇全面的文章,其中穿插了作者所描述的见解、建议和未来方向。
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引用次数: 0
Nonlinear 2D C1 Quadratic Spline Quasi-Interpolants on Triangulations for the Approximation of Piecewise Smooth Functions 用于分段光滑函数逼近的非线性二维C1二次样条拟插值
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12101002
Francesc Aràndiga, Sara Remogna
The aim of this paper is to present and study nonlinear bivariate C1 quadratic spline quasi-interpolants on uniform criss-cross triangulations for the approximation of piecewise smooth functions. Indeed, by using classical spline quasi-interpolants, the Gibbs phenomenon appears when approximating near discontinuities. Here, we use weighted essentially non-oscillatory techniques to modify classical quasi-interpolants in order to avoid oscillations near discontinuities and maintain high-order accuracy in smooth regions. We study the convergence properties of the proposed quasi-interpolants and we provide some numerical and graphical tests confirming the theoretical results.
本文的目的是在均匀交叉三角剖分上给出并研究用于分段光滑函数逼近的非线性二元C1二次样条拟插值。实际上,通过使用经典样条拟插值,在逼近近不连续点时出现了吉布斯现象。在这里,我们使用加权本质上的非振荡技术来修改经典的准插值,以避免在不连续区域附近的振荡,并保持光滑区域的高阶精度。我们研究了所提出的拟插值的收敛性,并给出了一些数值和图形测试来证实理论结果。
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引用次数: 0
Interpretable Model-Agnostic Explanations Based on Feature Relationships for High-Performance Computing 高性能计算中基于特征关系的可解释模型不可知解释
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12100997
Zhouyuan Chen, Zhichao Lian, Zhe Xu
In the explainable artificial intelligence (XAI) field, an algorithm or a tool can help people understand how a model makes a decision. And this can help to select important features to reduce computational costs to realize high-performance computing. But existing methods are usually used to visualize important features or highlight active neurons, and few of them show the importance of relationships between features. In recent years, some methods based on a white-box approach have taken relationships between features into account, but most of them can only work on some specific models. Although methods based on a black-box approach can solve the above problems, most of them can only be applied to tabular data or text data instead of image data. To solve these problems, we propose a local interpretable model-agnostic explanation approach based on feature relationships. This approach combines the relationships between features into the interpretation process and then visualizes the interpretation results. Finally, this paper conducts a lot of experiments to evaluate the correctness of relationships between features and evaluates this XAI method in terms of accuracy, fidelity, and consistency.
在可解释人工智能(XAI)领域,算法或工具可以帮助人们理解模型是如何做出决策的。这有助于选择重要的特征来降低计算成本,从而实现高性能计算。但现有的方法通常用于可视化重要特征或突出显示活动神经元,很少有方法显示特征之间关系的重要性。近年来,一些基于白盒方法的方法考虑了特征之间的关系,但大多数方法只能在某些特定的模型上工作。虽然基于黑盒方法的方法可以解决上述问题,但大多数方法只能应用于表格数据或文本数据,而不能应用于图像数据。为了解决这些问题,我们提出了一种基于特征关系的局部可解释模型不可知的解释方法。这种方法将特征之间的关系结合到解释过程中,然后将解释结果可视化。最后,本文进行了大量的实验来评估特征之间关系的正确性,并从准确性、保真度和一致性三个方面对这种XAI方法进行了评估。
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引用次数: 0
Optimality Conditions for Approximate Solutions of Set Optimization Problems with the Minkowski Difference 具有Minkowski差分的集优化问题近似解的最优性条件
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12101001
Yuhe Zhang, Qilin Wang
In this paper, we study the optimality conditions for set optimization problems with set criterion. Firstly, we establish a few important properties of the Minkowski difference for sets. Then, we introduce the generalized second-order lower radial epiderivative for a set-valued maps by Minkowski difference, and discuss some of its properties. Finally, by virtue of the generalized second-order lower radial epiderivatives and the generalized second-order radial epiderivatives, we establish the necessary optimality conditions and sufficient optimality conditions of approximate Benson proper efficient solutions and approximate weakly minimal solutions of unconstrained set optimization problems without convexity conditions, respectively. Some examples are provided to illustrate the main results obtained.
本文研究了具有集准则的集优化问题的最优性条件。首先,我们建立了集的闵可夫斯基差分的几个重要性质。然后,利用Minkowski差分引入集值映射的广义二阶下径向表皮,并讨论了它的一些性质。最后,利用广义二阶下径向表皮子和广义二阶径向表皮子,分别建立了无凸条件下无约束集优化问题近似Benson固有有效解和近似弱极小解的必要最优性条件和充分最优性条件。给出了一些例子来说明所得到的主要结果。
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引用次数: 0
Two Convergence Results for Inexact Orbits of Nonexpansive Operators in Metric Spaces with Graphs 带图度量空间中非膨胀算子非精确轨道的两个收敛结果
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12100999
Alexander J. Zaslavski
In this work we show that if iterates of a nonexpansive self-mapping of a complete metric with a graph converge uniformly on a subset of the space, then this convergence is stable under the presence of small computational errors.
在本文中,我们证明了如果具有图的完备度量的非扩张自映射的迭代在空间的子集上一致收敛,那么这种收敛在较小的计算误差下是稳定的。
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引用次数: 0
Lipschitz Continuity for Harmonic Functions and Solutions of the α¯-Poisson Equation 调和函数的Lipschitz连续性及α¯-Poisson方程的解
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12100998
Miodrag Mateljević, Nikola Mutavdžić, Adel Khalfallah
In this paper we investigate the solutions of the so-called α¯-Poisson equation in the complex plane. In particular, we will give sufficient conditions for Lipschitz continuity of such solutions. We also review some recently obtained results. As a corollary, we can restate results for harmonic and (p,q)-harmonic functions.
本文研究了复平面上α¯-泊松方程的解。特别地,我们将给出这类解的Lipschitz连续性的充分条件。我们还回顾了一些最近取得的成果。作为推论,我们可以重述调和函数和(p,q)-调和函数的结果。
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引用次数: 0
A Visualization in GeoGebra of Leibniz’s Argument on the Fundamental Theorem of Calculus 莱布尼茨关于微积分基本定理的论证在GeoGebra中的可视化
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-23 DOI: 10.3390/axioms12101000
Weimar Muñoz, Olga Lucía León, Vicenç Font
In the literature, it is usually assumed that Leibniz described proof for the Fundamental Theorem of Calculus (FTC) in 1693. However, did he really prove it? If the answer is no from today’s perspective, are there works in which Leibniz introduced arguments that can be understood as formulations and justifications of the FTC? In order to answer this question, we used a historiographic methodology with expert triangulation. From the study of Leibniz’s manuscripts describing the inverse problem of tangents and its relationship with the quadrature problem, we found evidence of a geometrical argument from which the FTC can be inferred. We present this argument using technological resources and modern notation. This result can be used to teach the FTC due to the existence of dynamic and geometrical software, which makes it suitable for the classroom. Moreover, it provides another interpretation of the FTC complementary to the interpretation using Riemann sums.
在文献中,通常假设莱布尼茨在1693年描述了微积分基本定理(FTC)的证明。然而,他真的证明了这一点吗?如果从今天的角度来看,答案是否定的,那么莱布尼茨在其中引入的论点是否可以被理解为联邦贸易委员会的表述和理由?为了回答这个问题,我们使用了史学方法和专家三角测量法。通过对莱布尼茨描述切线逆问题及其与正交问题关系的手稿的研究,我们发现了可以推断出FTC的几何论证的证据。我们使用技术资源和现代符号来提出这个论点。由于动态和几何软件的存在,这一结果可以用于FTC的教学,使其适合于课堂。此外,它还提供了对FTC的另一种解释,以补充使用黎曼和的解释。
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引用次数: 0
Normed Space of Fuzzy Intervals and Its Topological Structure 模糊区间的赋范空间及其拓扑结构
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-22 DOI: 10.3390/axioms12100996
Hsien-Chung Wu
The space, Fcc(R), of all fuzzy intervals in R cannot form a vector space. However, the space Fcc(R) maintains a vector structure by treating the addition of fuzzy intervals as a vector addition and treating the scalar multiplication of fuzzy intervals as a scalar multiplication of vectors. The only difficulty in taking care of Fcc(R) is missing the additive inverse element. This means that each fuzzy interval that is subtracted from itself cannot be a zero element in Fcc(R). Although Fcc(R) cannot form a vector space, we still can endow a norm on the space Fcc(R) by following its vector structure. Under this setting, many different types of open sets can be proposed by using the different types of open balls. The purpose of this paper is to study the topologies generated by these different types of open sets.
R中所有模糊区间的空间Fcc(R)不能构成一个向量空间。然而,空间Fcc(R)通过将模糊区间的加法处理为向量加法,将模糊区间的标量乘法处理为向量的标量乘法来保持向量结构。计算Fcc(R)的唯一困难是缺少加性逆元。这意味着从自身减去的每个模糊区间不可能是Fcc(R)中的零元素。虽然Fcc(R)不能形成一个向量空间,但我们仍然可以按照Fcc(R)空间的向量结构赋予它一个范数。在此设置下,通过使用不同类型的开球,可以提出许多不同类型的开球。本文的目的是研究这些不同类型的开集所产生的拓扑结构。
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引用次数: 0
Detection of Internal Wire Broken in Mining Wire Ropes Based on WOA–VMD and PSO–LSSVM Algorithms 基于WOA-VMD和PSO-LSSVM算法的矿用钢丝绳内部断丝检测
3区 数学 Q1 MATHEMATICS, APPLIED Pub Date : 2023-10-21 DOI: 10.3390/axioms12100995
Pengbo Li, Jie Tian, Zeyang Zhou, Wei Wang
To quantitatively identify internal wire breakage damage in mining wire ropes, a wire rope internal wire breakage signal identification method is proposed. First, the whale optimization algorithm is used to find the optimal value of the variational mode decomposition parameter [K, α] to obtain the optimal combination of the parameters, which reduces the signal noise with a signal-to-noise ratio of 29.29 dB. Second, the minimum envelope entropy of the noise reduction signal is extracted and combined with the time-domain features (maximum and minimum) and frequency-domain features (frequency–amplitude average, average frequency, average power) to form a fusion feature set. Finally, we use a particle swarm optimization–least squares support vector machine model to identify the internal wire breakage of wire ropes. The experimental results show that the method can effectively identify the internal wire rope breakage damage, and the average recognition rate is as high as 99.32%, so the algorithm can greatly reduce the system noise and effectively identify the internal damage signal of the wire rope, which is superior to a certain extent.
为了定量识别矿用钢丝绳断丝损伤,提出了一种钢丝绳断丝信号识别方法。首先,利用鲸鱼优化算法寻找变分模态分解参数[K, α]的最优值,得到参数的最优组合,降低了信号噪声,信噪比达到29.29 dB。其次,提取降噪信号的最小包络熵,并结合时域特征(最大值和最小值)和频域特征(频幅平均值、平均频率、平均功率)构成融合特征集;最后,采用粒子群优化-最小二乘支持向量机模型对钢丝绳内部断丝进行识别。实验结果表明,该方法可以有效识别钢丝绳内部断裂损伤,平均识别率高达99.32%,因此该算法可以大大降低系统噪声,有效识别钢丝绳内部损伤信号,在一定程度上具有优越性。
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引用次数: 0
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