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搜索引擎技术

  1. 搜索引擎基础

  2. 相关性

    • 相关性的定义与分档 [slides]

    • 相关性的评价指标 [slides]

    • 文本匹配分数 [slides]

    • 相关性BERT模型及其推理 [slides]

    • 相关性BERT模型的训练 [slides]

  3. 查询词处理

    • 分词：基于字典匹配的方法 & 新词发现

    • 分词：基于深度学习的方法

    • 词权重 (Term Weight)

    • 类目识别

    • 意图识别

    • 查询词改写

  4. 召回

    • 倒排索引和文本召回

    • 向量召回

    • 缓存召回

  5. 排序

    • 排序的原理

    • 融合模型的训练方法

  6. 查询词推荐

    • 查询词推荐的场景

    • 查询词推荐的召回

    • 查询词推荐的排序

About

搜索引擎原理

Resources

Readme
Activity

Stars

1.9k stars

Watchers

20 watching

Forks

162 forks
Report repository

Releases

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Contributors

, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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README.md
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Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Latest commit
History
15 Commits
Folders and files
NameName
Last commit message
Last commit date
Slides
Slides
README.md
README.md
SearchEngineBook.pdf
SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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BranchesTags
Latest commit
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15 Commits
Folders and files
NameName
Last commit message
Last commit date
Slides
Slides
README.md
README.md
SearchEngineBook.pdf
SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

Skip to content
BranchesTags
Latest commit
History
15 Commits
Folders and files
NameName
Last commit message
Last commit date
Slides
Slides
README.md
README.md
SearchEngineBook.pdf
SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Latest commit
History
15 Commits
Folders and files
NameName
Last commit message
Last commit date
Slides
Slides
README.md
README.md
SearchEngineBook.pdf
SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

Skip to content
BranchesTags
Latest commit
History
15 Commits
Folders and files
NameName
Last commit message
Last commit date
Slides
Slides
README.md
README.md
SearchEngineBook.pdf
SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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15 Commits
Folders and files
NameName
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README.md
README.md
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SearchEngineBook.pdf
Repository files navigation
搜索引擎技术
  1. 搜索引擎基础
  2. 相关性
    • 相关性的定义与分档
[slides]
    • 相关性的评价指标
[slides]
    • 文本匹配分数
[slides]
    • 相关性BERT模型及其推理
[slides]
    • 相关性BERT模型的训练
[slides]
  3. 查询词处理
    • 分词：基于字典匹配的方法 & 新词发现
    • 分词：基于深度学习的方法
    • 词权重 (Term Weight)
    • 类目识别
    • 意图识别
    • 查询词改写
  4. 召回
    • 倒排索引和文本召回
    • 向量召回
    • 缓存召回
  5. 排序
    • 排序的原理
    • 融合模型的训练方法
  6. 查询词推荐
    • 查询词推荐的场景
    • 查询词推荐的召回
    • 查询词推荐的排序
About
搜索引擎原理
Resources
Readme
Activity
Stars
1.9k stars
Watchers
20 watching
Forks
162 forks
Report repository
Releases
Packages
Contributors