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火电厂冷却塔噪声原因分析及降噪改造 被引量:7
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作者 舒永先 鄢晓忠 +3 位作者 徐慧芳 唐定忠 吴爱军 陈绍龙 《噪声与振动控制》 CSCD 2020年第4期199-203,245,共6页
湖南某火电厂2×660 MW火电机组配有两台淋水面积为10000 m^2的逆流式自然通风循环水冷却塔,冷却塔运行过程中噪声较大,高达86 dB(A),严重影响周围居民生活。对该冷却塔噪声产生机理的分析研究表明:冷却塔噪声来源有落水噪声、塔体... 湖南某火电厂2×660 MW火电机组配有两台淋水面积为10000 m^2的逆流式自然通风循环水冷却塔,冷却塔运行过程中噪声较大,高达86 dB(A),严重影响周围居民生活。对该冷却塔噪声产生机理的分析研究表明:冷却塔噪声来源有落水噪声、塔体噪声、布水噪声和循环水泵噪声等,其中落水噪声是主要来源。水滴直径(大小)、落水高度、通风风速等对落水噪声有较大影响。在一定范围内,水滴直径越大,落水高度越高,通风风速越小,噪声值越大。由此提出一种全新的降噪网技术,实施后效果良好,能有效降低噪声,降噪效果达到8 dB(A)以上。 展开更多
关键词 声学 冷却塔 声分析 落水 降噪网 效果
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Network Intrusion Detection Model Based on Ensemble of Denoising Adversarial Autoencoder 被引量:1
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作者 KE Rui XING Bin +1 位作者 SI Zhan-jun ZHANG Ying-xue 《印刷与数字媒体技术研究》 CAS 北大核心 2024年第5期185-194,218,共11页
Network security problems bring many imperceptible threats to the integrity of data and the reliability of device services,so proposing a network intrusion detection model with high reliability is of great research si... Network security problems bring many imperceptible threats to the integrity of data and the reliability of device services,so proposing a network intrusion detection model with high reliability is of great research significance for network security.Due to the strong generalization of invalid features during training process,it is more difficult for single autoencoder intrusion detection model to obtain effective results.A network intrusion detection model based on the Ensemble of Denoising Adversarial Autoencoder(EDAAE)was proposed,which had higher accuracy and reliability compared to the traditional anomaly detection model.Using the adversarial learning idea of Adversarial Autoencoder(AAE),the discriminator module was added to the original model,and the encoder part was used as the generator.The distribution of the hidden space of the data generated by the encoder matched with the distribution of the original data.The generalization of the model to the invalid features was also reduced to improve the detection accuracy.At the same time,the denoising autoencoder and integrated operation was introduced to prevent overfitting in the adversarial learning process.Experiments on the CICIDS2018 traffic dataset showed that the proposed intrusion detection model achieves an Accuracy of 95.23%,which out performs traditional self-encoders and other existing intrusion detection models methods in terms of overall performance. 展开更多
关键词 Intrusion detection Noise-Reducing autoencoder Generative adversarial networks Integrated learning
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