Table of Contents
Large model knowledge graph embedding的应用
1.推荐系统
2.自然语言处理
3.信息检索
4.图谱分析
5.其他领域
知识图嵌入原理
1.知识图表示
2.负采样
3.TransE模型
Example
Home Technology peripherals AI Large model knowledge graph embedding

Large model knowledge graph embedding

Jan 23, 2024 pm 07:45 PM
machine learning

Large model knowledge graph embedding

Large model knowledge graph embedding是通过深度学习模型将知识图中的实体和关系表示为低维连续的空间,这样可以方便计算实体之间的相似性、关系的强度以及进行其他推理任务。知识图嵌入的目标是将知识图中的实体和关系映射到连续的支撑空间,以便更好地表示它们的特征。这种嵌入技术能够提供更有效的知识表示和处理方式,从而为知识图的应用提供更好的基础。

Large model knowledge graph embedding的应用

Large model knowledge graph embedding广泛应用于推荐、自然语言处理、信息检索和图谱分析等领域。

1.推荐系统

知识图嵌入被广泛应用于推荐系统,以提高推荐的准确性和个性化程度。通过将用户、物品和行为交互嵌入到空间中,推荐系统能更好地理解它们之间的关系。这种方法能够更好地吸引用户的兴趣并捕捉物品的特征,从而实现更加智能和精准的个性化推荐。知识图嵌入的优势在于能够将用户和物品的属性以及它们之间的关联关系转化为低维向量表示。这样,系统可以通过计算向量之间的相似度来推荐与用户兴趣相匹配的物品。通过利用知识图嵌入的技术,推荐系统能够更好地理解用户的需求,提高推荐效果,从而为用户提供更好的个性化体

2.自然语言处理

知识图嵌入在自然语言处理任务中的应用可以增强语言模型的语义理解能力。通过将实体和嵌入关系映射到支持空间,模型能够更好地理解文本中实体及其关系,从而提高实体识别、关系抽取以及问答系统等任务的效果。

3.信息检索

知识图嵌入在信息搜索领域得到了广泛的评估,它有助于系统更好地理解查询和文档之间的语义关联,从而提高搜索结果的相关性。通过将查询、文档和知识图像的实体嵌入到支持空间中,系统可以更好地简化它们之间的语义相似度,从而提高信息检索的效果。这种方法能够在搜索过程中更好地利用语义信息,从而提供更准确和有用的搜索结果。

4.图谱分析

在知识图谱分析方面,知识图嵌入对于系统进行知识推理和分析起着重要的作用。它能够揭示隐藏在图谱中的模式、规则和规律,识别实体之间的复杂关系,并支持路径推理、实体分类、链接预测等任务,从而提高知识图谱的质量和可用性。通过将实体和关系映射到低维空间中的向量表示,知识图嵌入可以捕捉到实体之间的语义关联,使得系统能够更好地理解和利用知识图谱中的信息。此外,知识图嵌入还可以用于发现实体之间的相似性和关联性,为推荐系统、搜索引擎等提供有力支持。综上所述,知识图嵌入在知

5.其他领域

除了在领域外的应用,知识图嵌入还在语义匹配、知识图谱补全、关系抽取、命名实体识别等任务中发挥了重要的作用。在医疗、金融、电商等行业中,它也被广泛应用,帮助企业和组织更好地利用大量的知识图谱数据,提高决策能力、优化流程和改善用户体验。

知识图嵌入原理

1.知识图表示

三元组可以表示为((h,r,t)),其中(h)为头实体,(r)为关系,(t)为尾实体。例如,((Tom Hanks,acted_in,Forrest Gump))表示汤姆·汉克斯参与了《阿甘正传》。

2.负采样

在训练知识图嵌入模型时,通常需要使用负采样,这可以帮助模型区分正例(真实三元组)和负例(伪造三元组)。通过对比这两类样本,模型可以学习到将它们正确分开的能力。

3.TransE模型

TransE是一种常用的知识图嵌入模型,其基本思想相当于实体和关系都映射到支持空间中。对于每个三元组((h,r,t)),TransE通过以下最小化公式进行训练:

[\sum_{(h,r,t)\in S}\sum_{(h',r,t>对于每个三元组((h,r,t))

TransE通过最小化以下公式进行训练:

[\sum_{(h,r,t)\in S}\sum_{(h',r,t')\in S'}[\gamma+d(h+r,t')-d(h,t)]_+]

其中,(S)是正例三元组集合,(S')是由(S)生成的负例三元组集合,(d)表示距离函数,通常使用(L1)范数或(L2)范数,[x]_+]表示取正数部分,(\gamma)是一个边界参数。

TransE assumes that the combined solution of the head entity and relationship in the triplet plus the solution of the relationship is approximately equivalent to the solution of the tail entity (i.e. (h r\approx t)). By optimizing the above loss function, the model learns to map entity relationships into the provided space in a way that best satisfies this assumption.

Example

Take a simple knowledge graph as an example, containing the entities "Tom Hanks", "acted_in" and the relationship entity "Forrest Gump". We assume that entities and map to a two-dimensional service space.

1. Initialization instructions: Assume that the support of "Tom Hanks" is expressed as ([0.2,0.5]), the support of "Forrest Gump" is expressed as ([0.4,0.3]), and the support of "acted_in" is expressed is ([0.1,0.6]).

2. Calculate the loss: For the positive example ((Tom Hanks, acted_in, Forrest Gump)), we calculate the distance between (h r) and (t). If the distance is greater than the bounding parameter (\gamma), the loss is calculated.

3. Update warning: Based on the loss, we update the warnings of ("Tom Hanks"), ("Forrest Gump") and ("acted_in") to make them better satisfy (h r\approx t) conditions of.

4. Iterative training: Repeat the above steps until the model converges.

Through this training process, the model learns how to map entities and relationships to a low-dimensional storage space, which facilitates reasoning and analysis of knowledge graphs in the storage space.

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