信用卡欺诈预测:LightGBM与神经网络模型应用

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该论文《neo_信用卡欺诈预测模型.pdf》深入探讨了在信用卡行业中如何通过机器学习和风控算法来预测和防止欺诈行为。论文首先阐述了研究背景,指出随着信用卡的普及,欺诈问题日益突出,对银行和金融系统造成严重影响。研究的主要目的是利用统计方法和机器学习技术,针对信用卡交易中欺诈样本稀缺且类别不平衡的特点,设计有效的预测模型。 在数据探索性分析阶段,作者对目标变量(可能是信用卡交易是否为欺诈)进行了细致的研究,分析了特征分布和与标签的相关性,以及可能存在的离群点。数据预处理和特征工程是关键步骤,包括清洗数据、缺失值处理、特征转换和选择,这里提到了PIMP方法,它是一种特征选择算法,有助于提高模型的预测性能。 异常点检测是另一个核心环节,通过孤立森林算法进行异常检测,旨在识别潜在的欺诈交易。论文详细介绍了孤立森林的工作原理,并通过实验验证其在欺诈检测中的有效性,并给出了异常点检测的使用建议。 模型设计部分,作者比较了几种不同的机器学习模型,如LightGBM、神经网络(可能是深度学习)、Catboost(一种集成学习方法)和Logistic回归。每个模型的原理都被深入解析,包括它们的优化策略和实验结果。其中,LightGBM以其高效性和准确性表现出色。模型运行时间对比也是论文的重要部分,以便评估不同模型的效率。 最后,论文总结了整体研究,提出了一种模型融合的方法,通过整合多个模型的结果,以提高欺诈预测的准确性和鲁棒性。论文的结论部分还引用了相关文献,为后续的研究提供了理论支持。 《neo_信用卡欺诈预测模型.pdf》是一篇实用的金融风控论文,结合了实际案例和深入的模型分析,为金融机构提供了应对信用卡欺诈问题的有效策略和技术手段。

C:\Anaconda3\python.exe C:/pycharm.z/neo.py Traceback (most recent call last): File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 806, in acquire cx = self._free_list.popleft() IndexError: pop from an empty deque During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Anaconda3\lib\site-packages\py2neo\client\bolt.py", line 810, in _audit task.audit() File "C:\Anaconda3\lib\site-packages\py2neo\client\bolt.py", line 1303, in audit raise self._failure py2neo.errors.ClientError: [Security.Unauthorized] The client is unauthorized due to authentication failure. During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\pycharm.z\neo.py", line 4, in <module> graph = Graph("bolt://localhost:7687", auth=("neo4j", "password")) File "C:\Anaconda3\lib\site-packages\py2neo\database.py", line 288, in __init__ self.service = GraphService(profile, **settings) File "C:\Anaconda3\lib\site-packages\py2neo\database.py", line 119, in __init__ self._connector = Connector(profile, **connector_settings) File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 960, in __init__ self._add_pools(*self._initial_routers) File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 982, in _add_pools pool = ConnectionPool.open( File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 649, in open seeds = [pool.acquire() for _ in range(init_size or cls.default_init_size)] File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 649, in <listcomp> seeds = [pool.acquire() for _ in range(init_size or cls.default_init_size)] File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 813, in acquire cx = self._connect() File "C:\Anaconda3\lib\site-packages\py2neo\client\__init__.py", line 764, in _connect cx = Connection.open(self.profile, user_agent=self怎么解决

2023-07-15 上传

File "main.py", line 66, in <module> create_kg_by_neo4j(entity_json['N_RPA_PROJECT'][0]['ABSOLUTE_PATH'], is_create_neo4j) File "D:\IdeaProjects\domain-asset-management-platform\Asset_import_code\neo4j_kg.py", line 64, in create_kg_by_neo4j set_node(absolute_path) File "D:\IdeaProjects\domain-asset-management-platform\Asset_import_code\neo4j_kg.py", line 90, in set_node results_hp = session_hp.run(query[:-3]) File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\work\session.py", line 311, in run self._auto_result._run( File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\work\result.py", line 166, in _run self._attach() File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\work\result.py", line 274, in _attach self._connection.fetch_message() File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\io\_common.py", line 180, in inner func(*args, **kwargs) File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\io\_bolt.py", line 808, in fetch_message res = self._process_message(tag, fields) File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\io\_bolt3.py", line 412, in _process_message response.on_failure(summary_metadata or {}) File "D:\Program Files\Python38\lib\site-packages\neo4j\_sync\io\_common.py", line 247, in on_failure raise Neo4jError.hydrate(**metadata) neo4j.exceptions.CypherSyntaxError: {code: Neo.ClientError.Statement.SyntaxError} {message: Invalid input 'I': expected '\', ''', '"', 'b', 'f', 'n', 'r', 't', UTF16 or UTF32 (line 1, column 113 (offset: 112))

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