https://terms-en.ai-term-hub.com/zh/tags/training-methods/Recent content in Training Methods on 中文AI术语词典Hugozh-cnSat, 18 Jul 2026 11:44:45 +0000https://terms-en.ai-term-hub.com/zh/terms/lazy_learning/Sat, 18 Jul 2026 11:23:41 +0000https://terms-en.ai-term-hub.com/zh/terms/lazy_learning/<h2 id="definition">Definition</h2> <p>惰性学习者（如k近邻算法）会记住整个训练数据集，仅在做出预测时才进行计算。这与急切学习形成对比，后者会在训练阶段构建一个通用模型。</p> <h3 id="summary">Summary</h3> <p>一种学习方法，将泛化推迟到分类时才进行，存储训练实例而不是构建显式模型。</p> <h2 id="key-concepts">Key Concepts</h2> <ul> <li>基于实例的学习</li> <li>k近邻算法</li> <li>推理成本</li> <li>泛化</li> </ul> <h2 id="use-cases">Use Cases</h2> <ul> <li>推荐系统</li> <li>小数据集的模式识别</li> <li>预测模型的原型设计</li> </ul> <h2 id="code-example">Code Example</h2> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-python" data-lang="python"><span style="display:flex;"><span><span style="color:#f92672">from</span> sklearn.neighbors <span style="color:#f92672">import</span> KNeighborsClassifier </span></span><span style="display:flex;"><span>clf <span style="color:#f92672">=</span> KNeighborsClassifier(n_neighbors<span style="color:#f92672">=</span><span style="color:#ae81ff">5</span>) </span></span></code></pre></div><h2 id="related-terms">Related Terms</h2> <ul> <li><a href="https://terms-en.ai-term-hub.com/en/terms/instance_based_learning-%E5%9F%BA%E4%BA%8E%E5%AE%9E%E4%BE%8B%E7%9A%84%E5%AD%A6%E4%B9%A0/">instance_based_learning (基于实例的学习)</a></li> <li><a href="https://terms-en.ai-term-hub.com/en/terms/knn-k%E8%BF%91%E9%82%BB%E7%AE%97%E6%B3%95/">knn (k近邻算法)</a></li> <li><a href="https://terms-en.ai-term-hub.com/en/terms/eager_learning-%E6%80%A5%E5%88%87%E5%AD%A6%E4%B9%A0/">eager_learning (急切学习)</a></li> <li><a href="https://terms-en.ai-term-hub.com/en/terms/generalization-%E6%B3%9B%E5%8C%96/">generalization (泛化)</a></li> </ul>