相关实验视频
Updated: Jul 25, 2025

06:35
Basics of Multivariate Analysis in Neuroimaging Data
Published on: July 24, 2010
16.9K
通过融合多变量异质数据来分析欺诈风险警告和干扰效应的框架:贝叶斯信念网络
Mianning Hu1, Xin Li1, Mingfeng Li1
1School of Information and Network Security, People's Public Security University of China, Beijing 100038, China.
Entropy (Basel, Switzerland)
|June 28, 2023
概括
这项研究引入了贝叶斯网络模型来预测电信欺诈损失. 调查结果显示,年龄影响损失,反欺诈活动降低了风险,欺诈在夏季和销售活动期间达到顶峰.
科学领域:
- * 计算机科学 计算机科学
- * * 犯罪学 犯罪学
- * 数据科学数据科学
背景情况:
- *电信欺诈构成重大风险,需要先进的预防和管理策略.
- * 整合多变量异质数据用于前端欺诈检测仍然是一个关键的研究挑战.
研究的目的:
- * 开发一个基于贝叶斯网络的贝叶斯模型,用于预测电信欺诈风险和干预效率.
- * 建立一个使用现实数据和专家知识的电信欺诈分析和警告框架.
主要方法:
- *使用累积的数据,文献评论和专家见解构建了贝叶斯网络模型.
- *使用城市S作为案例研究来完善模型结构,并纳入电信欺诈映射.
- *进行了敏感性分析,以确定关键风险因素和干预影响.
主要成果:
- * 年龄表明对电信欺诈损失的最大敏感度为13.5%.
- *反欺诈宣传可以将超过30万元人民币的损失概率降低2%.
- *电信欺诈事件在夏季更为普遍,在秋季更为罕见,在双11购物期间显著增加.
结论:
- * 开发的模型为现实世界的电信欺诈预防提供了实际价值.
- *早期预警框架为执法部门和社区提供了关键的决策支持,帮助他们识别高风险的人口,地点和时间模式.
- * 调查结果支持有针对性的反欺诈活动和及时警告,以减轻财务损失.
相关概念视频
Statistical Inference Techniques in Hypothesis Testing: Parametric Versus Nonparametric Data
158
Statistical inference techniques, paramount in hypothesis testing, differentiate into two broad categories: parametric and nonparametric statistics.
Parametric statistics, as the name suggests, assumes that data follow a specific distribution, often a normal distribution. This assumption enables robust hypothesis testing and estimation. Parametric methods, like the Student's t-test or Goodness-of-fit test, are frequently employed in biostatistics due to their robustness. For instance,...
Parametric statistics, as the name suggests, assumes that data follow a specific distribution, often a normal distribution. This assumption enables robust hypothesis testing and estimation. Parametric methods, like the Student's t-test or Goodness-of-fit test, are frequently employed in biostatistics due to their robustness. For instance,...
158
Statistical Hypothesis Testing
2.0K
Hypothesis testing is a critical statistical procedure facilitating informed, evidence-based decisions. It begins with a hypothesis, which is a tentative explanation, or a prediction about a population parameter. This hypothesis can be either a null hypothesis (H0), indicating no effect or difference, or an alternative hypothesis (Ha), suggesting an effect or difference.
Statistical significance measures the probability that an observed result occurred by chance. If this probability, known as...
Statistical significance measures the probability that an observed result occurred by chance. If this probability, known as...
2.0K
Friedman Two-way Analysis of Variance by Ranks
250
Friedman's Two-Way Analysis of Variance by Ranks is a nonparametric test designed to identify differences across multiple test attempts when traditional assumptions of normality and equal variances do not apply. Unlike conventional ANOVA, which requires normally distributed data with equal variances, Friedman's test is ideal for ordinal or non-normally distributed data, making it particularly useful for analyzing dependent samples, such as matched subjects over time or repeated measures...
250
Statistical Analysis: Overview
6.7K
When we take repeated measurements on the same or replicated samples, we will observe inconsistencies in the magnitude. These inconsistencies are called errors. To categorize and characterize these results and their errors, the researcher can use statistical analysis to determine the quality of the measurements and/or suitability of the methods.
One of the most commonly used statistical quantifiers is the mean, which is the ratio between the sum of the numerical values of all results and the...
One of the most commonly used statistical quantifiers is the mean, which is the ratio between the sum of the numerical values of all results and the...
6.7K
Confirmation Biases
5.5K
The confirmation bias is the tendency to focus on information that confirms our existing beliefs and ignore information that is inconsistent with our expectations. For example, if you think that your professor is not very nice, you notice all of the instances of rude behavior exhibited by the professor while ignoring the countless pleasant interactions he is involved in on a daily basis. Have you ever fallen prey to the confirmation bias, either as the source or target of such bias?
5.5K
Probability in Statistics
13.5K
Probability is the likelihood of an event occurring. The term event is defined as a collection of results of a procedure. An event is a simple event when an outcome cannot be divided into simpler parts.
An example of a simple event is a coin toss. The result of a coin toss is either a head or a tail. Here, head and tail are two simple events. These two simple events make up the sample space. Further, the probability of an event occurring falls within the range of 0 to 1. The probability of an...
An example of a simple event is a coin toss. The result of a coin toss is either a head or a tail. Here, head and tail are two simple events. These two simple events make up the sample space. Further, the probability of an event occurring falls within the range of 0 to 1. The probability of an...
13.5K

