### 统计代写|贝叶斯网络代写Bayesian network代考|ENGG2100

statistics-lab™ 为您的留学生涯保驾护航 在代写贝叶斯网络Bayesian network方面已经树立了自己的口碑, 保证靠谱, 高质且原创的统计Statistics代写服务。我们的专家在代写贝叶斯网络Bayesian network代写方面经验极为丰富，各种代写贝叶斯网络Bayesian network相关的作业也就用不着说。

• Statistical Inference 统计推断
• Statistical Computing 统计计算
• (Generalized) Linear Models 广义线性模型
• Statistical Machine Learning 统计机器学习
• Longitudinal Data Analysis 纵向数据分析
• Foundations of Data Science 数据科学基础

## 统计代写|贝叶斯网络代写Bayesian network代考|Reliability and Availability

As shown in Fig. 6, the reliability and availability of the PV systems with centralized, string, and multistring configurations in the presence of intermittent faults are calculated and plotted. Intermittent fault coefficient $x$, permanent fault coefficient $y$, and intermittent repair coefficient $z$ are set to 40,20 , and $50 \%$, respectively.

The reliabilities of the three PV systems decrease with the increase of time (Fig. 6 a, b). In particular, the reliability of the PV system with centralized configuration rapidly decreases, compared with the other systems. The PV system with string configuration has high reliability in the first five years, whereas the PV system with multistring configuration has a high reliability after five years. The main reason behind this case is the fact that the redundant DC/AC inverters first lead to a high system reliability of the PV system with string configuration first. A low failure rate of the $\mathrm{DC} / \mathrm{AC}$ inverter subsequently leads to a high system reliability of the PV system with multistring configuration Therefore, in terms of reliability, the multistring configuration is the best choice in designing PV systems, whereas the centralized configuration is the worst choice.

The comparison of the reliability in Fig. $6 \mathrm{a}$, b indicates that the intermittent faults just slightly affect the reliability values in the first ten years. The three PV systems with intermittent faults have a slightly higher reliability than those without intermittent faults. The average reliability increments of ten years for centralized, string, and multistring configurations are $0.50,0.78$, and $0.40 \%$, respectively. This is because that the intermittent faults can transform to no faults, which is autorecovery. This finding is attributed to the fact that the intermittent faults can be transformed into “no faults,” which is autorecovery.

## 统计代写|贝叶斯网络代写Bayesian network代考|Mutual Information Investigation

Mutual information measures the information shared by two variables and determines the degree of uncertainty of reduction of one variable by knowing one of the other variables [34]. This information can be used to identify the degree of importance of each PV component to the entire PV system. In this study, the degree of importance in three moments, i.e., first, fifth, and tenth years, is investigated, as shown in Fig. 8 . The degree of importance of the components of the three PV systems is the same, which is in the order of DC/AC inverter, DC/DC converter, DC combiner, and PV module arranged from largest to smallest. This degree increases with the increase of time. The $\mathrm{DC} / \mathrm{AC}$ inverter is determined to affect the reliability of the $\mathrm{PV}$ system significantly with multistring configuration, whereas the other components only exert a few contributions. Therefore, the DC/AC inverter should be given considerable attention to improve the reliability and availability of PV systems and to prevent their possible failures. The failure rates of the components of a PV system with a specified configuration should be reduced, but their repair rates should be increased to improve the reliability and availability of such system. Hence, the DC/AC inverter with low failure rates should be used in design and manufacturing stages of PV systems. Moreover, the repair rate of this component should be increased in the usage stage.

## 有限元方法代写

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## MATLAB代写

MATLAB 是一种用于技术计算的高性能语言。它将计算、可视化和编程集成在一个易于使用的环境中，其中问题和解决方案以熟悉的数学符号表示。典型用途包括：数学和计算算法开发建模、仿真和原型制作数据分析、探索和可视化科学和工程图形应用程序开发，包括图形用户界面构建MATLAB 是一个交互式系统，其基本数据元素是一个不需要维度的数组。这使您可以解决许多技术计算问题，尤其是那些具有矩阵和向量公式的问题，而只需用 C 或 Fortran 等标量非交互式语言编写程序所需的时间的一小部分。MATLAB 名称代表矩阵实验室。MATLAB 最初的编写目的是提供对由 LINPACK 和 EISPACK 项目开发的矩阵软件的轻松访问，这两个项目共同代表了矩阵计算软件的最新技术。MATLAB 经过多年的发展，得到了许多用户的投入。在大学环境中，它是数学、工程和科学入门和高级课程的标准教学工具。在工业领域，MATLAB 是高效研究、开发和分析的首选工具。MATLAB 具有一系列称为工具箱的特定于应用程序的解决方案。对于大多数 MATLAB 用户来说非常重要，工具箱允许您学习应用专业技术。工具箱是 MATLAB 函数（M 文件）的综合集合，可扩展 MATLAB 环境以解决特定类别的问题。可用工具箱的领域包括信号处理、控制系统、神经网络、模糊逻辑、小波、仿真等。