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| /* 判定：k 落在哪一段。单位：E_d = 1, C_d = 0。 */ | |
| function verdict(k, L, dC, dE) { | |
| const lines = { open: L, innovate: dC / dE }; // 两条门槛 | |
| const lower = Math.max(lines.open, lines.innovate); | |
| const willOpen = k > lines.open; // 蒸馏者愿意公开 | |
| const willInnovate = k > lines.innovate; // 有人愿意自己做 | |
| let state; | |
| if (!willOpen) state = "secrecy"; // 没人公开：全闭源 | |
| else if (!willInnovate) state = "imitation"; // 公开了但没人自己做：全蒸馏 | |
| else state = "healthy"; | |
| return { lines, lower, willOpen, willInnovate, state }; | |
| } | |
| /* 四格净收益。E_d = 1, C_d = 0 => E_n = 1 + dE, C_n = dC */ | |
| function payoff(k, L, dC, dE) { | |
| const En = 1 + dE; | |
| return { | |
| imitateClosed: 0, | |
| imitateOpen: k * 1 - L, | |
| innovateClosed: -dC, | |
| innovateOpen: -dC + k * En - L, | |
| }; | |
| } | |
| if (typeof module !== "undefined") module.exports = { verdict, payoff }; | |