具有持久状态的纳米孔蛋白质部分重读的可靠性极限与解码
Reliability Limits and Decoding for Partial Nanopore Protein Rereads With Persistent State
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中文总结 AI 辅助
该研究将纳米孔蛋白质部分重读建模为特定信道，推导相关界与诊断方法，在PASTOR驱动的信道上验证LB-IS算法，确定有限记忆边界并实现NLL降低。
中文摘要 AI 辅助
对同一物理对象的多次观测不一定构成独立的信道使用。我们将纳米孔蛋白质部分重读建模为有限字母集信道，具有规范内容、持久读出以及逐段覆盖与同步特性。对于精确的复合逐段数据，匹配推理方法趋近于等价类规范后验，位点级超额贝叶斯风险存在一种感知动作的可达指数。在对齐的特例中，观测局部重绘会导致真实标签负对数似然（NLL）随K呈线性增长。我们推导了b阶投影稳定性界和精确的逐段融合诊断方法。在PASTOR驱动的半合成硬符号信道上，标签盲确定性混合重要性采样（LB-IS）在L=7时与精确枚举结果一致；当L=24、K=10时，LB-IS在三个选定条件下均满足固定高分配参考设定的所有预先指定的聚合绝对边际后验及得分一致性准则，代表性条件和高NLL条件下联合一致性成立，近零条件下结果不确定。精确的L≤6基准测试确定4阶为最小测试公共上限。在目标规模下，参考支持选定的未投影泛函，而4阶和5阶均未达到联合一致性，从而确定了测试的有限记忆边界。在16个细胞中，与逐段方法相比，4阶共享分支使每个残基的NLL降低0.033-0.224纳特。
英文摘要
Repeated observations of one physical object need not constitute independent channel uses. We model partial nanopore protein rereads as a finite-alphabet channel with canonical content, persistent readout, and pass-local coverage and synchronization. For exact compound-pass data, matched inference approaches the equivalence-class canonical posterior, and sitewise excess Bayes risk admits an action-aware achievable exponent. In an aligned specialization, observation-local redraw can cause linear-in-$K$ growth in true-label negative log-likelihood (NLL). We derive order-$b$ projection-stability bounds and an exact passwise-fusion diagnostic. On a PASTOR-informed semi-synthetic hard-symbol channel, label-blind deterministic-mixture importance sampling (LB-IS) agrees with exact enumeration at $L=7$. At $L=24, K=10$, LB-IS meets every prespecified aggregate absolute marginal-posterior and score-agreement criterion against a fixed high-allocation reference in three selected conditions. Joint agreement holds for the representative and high-NLL conditions, while the near-zero condition remains inconclusive. Exact $L \leq 6$ benchmarks identify order 4 as the smallest tested common cap. At target scale, the reference supports selected unprojected functionals, while neither order 4 nor 5 attains joint agreement, defining a tested finite-memory boundary. Across 16 cells, the order-4 shared branch lowers NLL by 0.033-0.224 nats per residue relative to pass-local.
