逼近度(approach)经过冷却塔冷却后的水温与环境湿球温度的差值。
提出了自适应学习率及动量因子的BP神经网络算法和误差逼近度渐近收缩学习的BP神经网络算法，并将其应用于汽轮发电机组振动故障诊断与识别。
The improved BP algorithms based on adaptive parameters adjustment and error contracting gradually are presented, which are applied successfully to fault diagnosis of steam- turbine generator unit.
沪指开盘后震荡上攻，盘中一度逼近3100点大关。
The Shanghai Composite Index jumped after opening, but despite suffering some fluctuations reached near 3100 points during trading.
随着计算能力的增加，以及传感器、效应器与显示器的改进，虚拟现实将开始在保真度和互动性上逼近物理现实。
As computational power increases, and as sensors, effectors and displays improve, VR could begin to approximate physical reality in terms of fidelity and interactivity.
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