feat: add interactive demos for AI history, Auth design, and Git intro

This commit is contained in:
sanbuphy
2026-01-19 11:25:10 +08:00
parent bb28f010e3
commit 7d86ba9504
55 changed files with 12984 additions and 5776 deletions
@@ -0,0 +1,383 @@
<template>
<div class="backpropagation-demo">
<div class="demo-header">
<h4>🔄 反向传播演示</h4>
<p>观察神经网络如何通过误差反向调整权重</p>
</div>
<div class="demo-content">
<div class="network-view">
<svg class="network-svg" viewBox="0 0 600 300">
<!-- Layers visualization -->
<g v-for="(layer, lIndex) in 3" :key="lIndex">
<text :x="100 + lIndex * 200" y="20" text-anchor="middle" class="layer-label">
{{ lIndex === 0 ? '输入层' : lIndex === 1 ? '隐藏层' : '输出层' }}
</text>
<circle
v-for="n in 3"
:key="`${lIndex}-${n}`"
:cx="100 + lIndex * 200"
:cy="60 + n * 70"
:r="25"
:class="['neuron', getNeuronClass(lIndex, n)]"
/>
</g>
<!-- Connections with error flow -->
<line
v-for="conn in connections"
:key="conn.id"
:x1="conn.x1"
:y1="conn.y1"
:x2="conn.x2"
:y2="conn.y2"
:stroke="conn.color"
:stroke-width="conn.width"
:opacity="conn.opacity"
class="connection"
/>
</svg>
</div>
<div class="controls-panel">
<div class="step-indicator">
<div
v-for="(step, index) in steps"
:key="index"
:class="['step', { active: currentStep === index, completed: currentStep > index }]"
>
<div class="step-number">{{ index + 1 }}</div>
<div class="step-label">{{ step }}</div>
</div>
</div>
<div class="error-display">
<div class="error-value">
误差: {{ errorValue.toFixed(4) }}
</div>
<div class="error-bar">
<div class="error-fill" :style="{ width: (errorValue * 100) + '%' }"></div>
</div>
</div>
<button @click="nextStep" class="step-btn" :disabled="currentStep >= 4">
{{ currentStep < 4 ? '下一步 ▶' : '完成 ✓' }}
</button>
<button @click="resetDemo" class="reset-btn">
🔄 重置演示
</button>
<div class="explanation">
<p><strong>当前步骤:</strong> {{ explanations[currentStep] }}</p>
</div>
</div>
</div>
</div>
</template>
<script setup>
import { ref, computed } from 'vue'
const currentStep = ref(0)
const errorValue = ref(0.95)
const steps = ['前向传播', '计算误差', '反向传播', '更新权重']
const explanations = [
'输入数据通过各层传递,得到预测输出',
'对比预测值和真实值,计算误差',
'将误差从输出层反向传递到各层',
'根据误差梯度调整每个神经元的权重'
]
const connections = ref([])
// 初始化连接
const initConnections = () => {
const conns = []
for (let l = 0; l < 2; l++) {
for (let i = 1; i <= 3; i++) {
for (let j = 1; j <= 3; j++) {
conns.push({
id: `${l}-${i}-${j}`,
x1: 100 + l * 200,
y1: 60 + i * 70,
x2: 100 + (l + 1) * 200,
y2: 60 + j * 70,
color: 'var(--vp-c-divider)',
width: 1,
opacity: 0.3,
active: false
})
}
}
}
connections.value = conns
}
const getNeuronClass = (layer, neuron) => {
if (currentStep.value === 0 && layer === 0) return 'active'
if (currentStep.value === 1 && layer === 2) return 'error'
if (currentStep.value >= 2) return 'updated'
return ''
}
const nextStep = () => {
if (currentStep.value < 4) {
currentStep.value++
// 模拟误差减小
if (currentStep.value === 2) {
errorValue.value = 0.95
} else if (currentStep.value === 3) {
errorValue.value = 0.65
} else if (currentStep.value === 4) {
errorValue.value = 0.32
}
// 更新连接显示
updateConnections()
}
}
const updateConnections = () => {
if (currentStep.value >= 2) {
connections.value.forEach((conn) => {
conn.color = 'var(--vp-c-brand)'
conn.width = 2
conn.opacity = 0.6
})
}
}
const resetDemo = () => {
currentStep.value = 0
errorValue.value = 0.95
initConnections()
}
// 初始化
initConnections()
</script>
<style scoped>
.backpropagation-demo {
margin: 1rem 0;
padding: 1.5rem;
background: var(--vp-c-bg-soft);
border: 1px solid var(--vp-c-divider);
border-radius: 8px;
color: var(--vp-c-text-1);
}
.demo-header {
text-align: center;
margin-bottom: 1.5rem;
}
.demo-header h4 {
margin: 0 0 0.5rem 0;
color: var(--vp-c-text-1);
font-size: 1.5rem;
}
.demo-header p {
margin: 0;
color: var(--vp-c-text-2);
font-size: 0.875rem;
}
.demo-content {
display: grid;
grid-template-columns: 1fr 1fr;
gap: 2rem;
}
.network-view {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
padding: 1rem;
border-radius: 8px;
}
.network-svg {
width: 100%;
height: auto;
}
.layer-label {
font-size: 12px;
font-weight: 600;
fill: var(--vp-c-text-2);
}
.neuron {
fill: var(--vp-c-bg-alt);
stroke: var(--vp-c-divider);
stroke-width: 2;
transition: all 0.5s ease;
}
.neuron.active {
fill: var(--vp-c-green-1, #22c55e);
stroke: var(--vp-c-green-2, #16a34a);
}
.neuron.error {
fill: var(--vp-c-red-1, #ef4444);
stroke: var(--vp-c-red-2, #dc2626);
}
.neuron.updated {
fill: var(--vp-c-brand);
stroke: var(--vp-c-brand);
}
.connection {
transition: all 0.5s ease;
}
.controls-panel {
background: var(--vp-c-bg);
border: 1px solid var(--vp-c-divider);
padding: 1.5rem;
border-radius: 8px;
}
.step-indicator {
display: flex;
justify-content: space-between;
margin-bottom: 1.5rem;
}
.step {
flex: 1;
text-align: center;
position: relative;
opacity: 0.4;
transition: all 0.3s ease;
}
.step.active,
.step.completed {
opacity: 1;
}
.step-number {
width: 36px;
height: 36px;
margin: 0 auto 0.5rem;
background: var(--vp-c-bg-alt);
border-radius: 50%;
display: flex;
align-items: center;
justify-content: center;
font-weight: 700;
font-size: 0.875rem;
color: var(--vp-c-text-2);
transition: all 0.3s ease;
}
.step.active .step-number {
background: var(--vp-c-brand);
color: var(--vp-c-bg);
}
.step.completed .step-number {
background: var(--vp-c-green-1, #22c55e);
color: var(--vp-c-bg);
}
.step-label {
font-size: 0.75rem;
color: var(--vp-c-text-2);
}
.error-display {
margin-bottom: 1.5rem;
padding: 1rem;
background: var(--vp-c-bg-soft);
border: 1px solid var(--vp-c-divider);
border-radius: 6px;
}
.error-value {
font-weight: 700;
color: var(--vp-c-red-1, #ef4444);
margin-bottom: 0.5rem;
}
.error-bar {
height: 8px;
background: var(--vp-c-bg-alt);
border-radius: 4px;
overflow: hidden;
}
.error-fill {
height: 100%;
background: var(--vp-c-red-1, #ef4444);
transition: width 0.5s ease;
}
.step-btn,
.reset-btn {
width: 100%;
padding: 0.75rem;
margin-bottom: 0.75rem;
border: 1px solid var(--vp-c-divider);
border-radius: 6px;
font-weight: 600;
cursor: pointer;
transition: all 0.3s ease;
}
.step-btn {
background: var(--vp-c-brand);
border-color: var(--vp-c-brand);
color: var(--vp-c-bg);
}
.step-btn:hover:not(:disabled) {
opacity: 0.95;
}
.step-btn:disabled {
opacity: 0.6;
cursor: not-allowed;
}
.reset-btn {
background: var(--vp-c-bg);
color: var(--vp-c-text-1);
}
.reset-btn:hover {
border-color: var(--vp-c-brand);
}
.explanation {
padding: 1rem;
background: rgba(var(--vp-c-brand-rgb), 0.08);
border-left: 4px solid var(--vp-c-brand);
border-radius: 4px;
border: 1px solid rgba(var(--vp-c-brand-rgb), 0.15);
}
.explanation p {
margin: 0;
font-size: 0.875rem;
line-height: 1.6;
color: var(--vp-c-text-2);
}
.explanation strong {
color: var(--vp-c-text-1);
}
@media (max-width: 768px) {
.demo-content {
grid-template-columns: 1fr;
}
}
</style>