双视图图的图表表示学习与图表转换器用于图表级异常检测
Wangyu Jin1, Huifang Ma1, Yingyue Zhang1
1College of Computer Science and Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China.
概括
本研究介绍了一种新的双视图图表表示学习网络,用于图表级异常检测 (GLAD). 该方法通过考虑内部图形结构和图形之间的关系来增强图形表示,以便更有效地检测异常.
科学领域:
- 图形表示学习学习学习图形表示.
- 机器学习是机器学习.
- 数据挖掘是一种数据挖掘.
背景情况:
- 图形级异常检测 (GLAD) 旨在识别数据集中的异常图形.
- 当前的图形神经网络 (GNN) 方法在捕获全面的图形内部信息和图形内部关系方面存在局限性.
研究的目的:
- 提出一种新的无监督GLAD方法,以解决现有的基于GNN的方法的局限性.
- 通过考虑图表内部和图表内部的视角来加强异常的检测.
主要方法:
- 引入了一个图形变压器,以扩大接收场,以获得更丰富的图形内特征提取.
- 开发了一个基于Graph-of-Graph的双视图表示学习网络,以建模交叉图的依赖关系.
- 使用多视角异常得分进行全面的异常量化.
主要成果:
- 拟议的方法有效地捕获图表中的和图表之间的属性和结构信息.
- 在多个基准数据集中检测异常方面表现出卓越的性能.
- 双视图方法提供了对图形异常的更强有力的评估.
结论:
- 新的双视图图表表示学习网络显著改善了无监督的GLAD.
- 考虑图内和图内视角对于有效的异常检测至关重要.
- 该方法提供了一种全面的方法来识别异常图.
相关概念视频
Types Of Transformers
943
Transformers can provide desired voltages to a circuit by modifying the number of turns in the secondary windings.
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
If the ratio of the number of turns in the secondary winding to that of the primary winding is greater than one, then the transformer is said to be a step-up transformer. In a step-up transformer, the voltage at the secondary winding is greater than the voltage applied at the primary winding.
However, if this ratio is less than one, the transformer is said to be a step-down...
943
Time-Series Graph
4.3K
A time-series graph is a line graph with repeated measurements taken at successive intervals of time. It is also called a time series chart. To construct a time-series graph, one must look at both pieces of a paired data set. The horizontal axis is used to plot the time increments, and the vertical axis is used to plot the values of the variable that one is measuring. By using the axes in this way, each point on the graph will correspond to time and a measured quantity. The points on the graph...
4.3K
Vector Algebra: Graphical Method
11.8K
Vectors can be multiplied by scalars, added to other vectors, or subtracted from other vectors. The vector sum of two (or more) vectors is called the resultant vector or, for short, the resultant.
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
We use the laws of geometry to construct resultant vectors, followed by trigonometry to find vector magnitudes and directions. For a geometric construction of the sum of two vectors in a plane, we follow the parallelogram rule. Suppose two vectors are at arbitrary positions. Translate either one of...
11.8K
Transformers in Distribution System
98
Transformers in distribution systems can be broadly categorized into distribution substation transformers and other distribution transformers. They are crucial for stepping down high transmission voltages to levels suitable for distribution and end-user applications.
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
Distribution substation transformers come in various ratings and typically use mineral oil for insulation and cooling. To prevent moisture and air from entering the oil, some transformers use an inert gas like nitrogen to fill the...
98
Multiple Bar Graph
5.0K
As the name suggests, a multiple bar graph is the same as a bar graph but has multiple bars to depict relationships between different data values. One can include as many parameters as possible. However, each parameter must have the same unit of measurement.
Each bar or column in the multiple bar graph represents a data value. These graphs are used primarily in interrelating two or more sets of data. The categories of different kinds of data are listed along the horizontal or x-axis, whereas...
Each bar or column in the multiple bar graph represents a data value. These graphs are used primarily in interrelating two or more sets of data. The categories of different kinds of data are listed along the horizontal or x-axis, whereas...
5.0K
Signal Flow Graphs
154
Signal-flow graphs offer a streamlined and intuitive approach to representing control systems, providing an alternative to traditional block diagrams. These graphs use branches to symbolize systems and nodes to represent signals, effectively illustrating the relationships and interactions within the system.
In a signal-flow graph, branches denote the system's transfer functions, while nodes represent the signals. The direction of signal flow is indicated by arrows, with the corresponding...
In a signal-flow graph, branches denote the system's transfer functions, while nodes represent the signals. The direction of signal flow is indicated by arrows, with the corresponding...
154


