Nash optimality納什最優性natural language generation自然語言生成nearest-neighbor最近鄰necessity measure必然性側度negative feedback負反饋neural assembly神經集合neural network computer神經網絡計算機Nichols chart尼科爾斯圖noetic science思維科學noncoherent system非單調關聯系統noncooperative game非合作博弈nonequilibrium state非平衡態nonlinear element非線性環節

　　nonmonotonic logic非單調邏輯nonparametric training非參數訓練nonreversible electric drive不可逆電氣傳動nonsingular perturbation非奇異攝動 non-stationary random process非平穩隨機過程nuclear radiation levelmeter核輻射物位計 nutation sensor章動敏感器Nyquist stability criterion奈奎斯特穩定判據objective function目標函數observability index可觀測指數observable canonical form可觀測規范型on-line assistance在線幫助on-off control通斷控制open loop pole開環極點operational research model運籌學模型optic fiber tachometer光纖式轉速表optimal trajectory最優軌跡optimization technique最優化技術orbital rendezvous軌道交會orbit gyrocompass軌道陀螺羅盤orbit perturbation軌道攝動order parameter序參數orientation control定向控制originator始發站oscillating period振蕩周期output prediction method輸出預估法oval wheel flowmeter橢圓齒輪流量計overall design總體設計overdamping過阻尼overlapping decomposition交疊分解