Query

01 · 手电筒先决定照哪里 01 · The flashlight aims before it finds

黑暗房间里有三个标签，只转动灯头，最显眼的候选为什么会换位？ Three labels sit in a dark room. Why does turning only the lamp reorder which candidate stands out?

02 旋转 Query 探照灯 Rotate the Query Spotlight

探照灯隐喻 Spotlight metaphor

当前需要 Current need

什么

由 Q 方向表达 encoded by Q direction

候选第 1 Top candidate

皮球

—

最大线宽 Max line width

—

1.5 + weight × 10

复用 S3 线宽语法：lineWidth = 1.5 + weight × 10。灯光强弱与候选线宽都来自同一个权重。 S3 line grammar reused: lineWidth = 1.5 + weight × 10. Spotlight intensity and candidate line width come from the same weight.

03 Query 探照灯的 4 个零件 Four Parts of the Query Spotlight

提出需要，不携带答案 Encodes a need, not an answer

PART 01

当前位置 Current position

“它”需要从上下文补足某类信息。 “It” needs a kind of information from context.

PART 02

Q 用方向表达“此刻要找什么”。 Q uses direction to encode what is sought now.

PART 03

Key

候选 Key 声明自己适合怎样被匹配。 Candidate Keys describe how they can be matched.

PART 04

匹配排序 Match ranking

方向越对齐，分数与归一化权重越高。 Closer alignment produces a higher score and normalized weight.

04 最小机制：用 Q 与每个 K 做匹配 Minimal Mechanism: Match Q Against Every K

score_i = Q · K_i

Q angle ↔ K_i angle → score_i → weight_i

此页用二维方向和 cosine 做玩具匹配。旋转 Q 会改变所有分数，但 Key 本身保持不动。 This toy uses 2D direction and cosine matching. Rotating Q changes every score while the Keys stay fixed.

旋转 Q Rotate Q 改变所求方向 Change the need direction

重算对齐 Recompute alignment 三项分数换位 Three scores reorder

重画线宽 Redraw line widths 候选排名更新 Ranking updates

05 边界实验：把灯指向三个 Key 之外 Boundary Test: Aim Away from Every Key

主动制造失败 Create a failure

Query 不保证一定找到好匹配 A Query does not guarantee a good match

把 Q 转到 180°，背对当前三个 Key。softmax 仍会分完权重，但“有第一名”不等于“第一名匹配良好”。 Turn Q to 180°, away from the three Keys. Softmax still distributes all weight, but having a first place does not mean the match is good.

尚未执行。当前 Q 正对“皮球”Key。 Not run yet. Q currently points at the ball Key.

✗ Query 就是用户输入的问句。 A Query is the user's written question. → ✓ 它是当前位置内部生成的匹配向量。 It is an internal matching vector for a position.

✗ Query 里已经装着答案。 The Query already contains the answer. → ✓ Q 表达需要，内容要从 Value 汇总。 Q expresses a need; content comes from Values.

✗ 排序第一就一定高度匹配。 Rank one must be a strong match. → ✓ 它可能只是几个弱匹配里最高。 It may only be the best among weak matches.

06 · 一句话带走 06 · One line to keep

Query 是当前位置提出“我需要找什么”的向量；旋转探照灯，就能检验 Key 排名与注意力线宽怎样一起换位。 A Query is the current position's vector for “what I need to find.” Rotate the spotlight to verify how Key ranking and attention line width move together.