Deep Neural Network Based Detection and Segmentation of Ships for Maritime Surveillance

In recent years,computer visionfinds wide applications in maritime surveillance with its sophisticated algorithms and advanced architecture.Auto-matic ship detection with computer vision techniques provide an efficient means to monitor as well as track ships in water bodies.Waterways being an important medium of transport require continuous monitoring for protection of national security.The remote sensing satellite images of ships in harbours and water bodies are the image data that aid the neural network models to localize ships and to facilitate early identification of possible threats at sea.This paper proposes a deep learning based model capable enough to classify between ships and no-ships as well as to localize ships in the original images using bounding box tech-nique.Furthermore,classified ships are again segmented with deep learning based auto-encoder model.The proposed model,in terms of classification,provides suc-cessful results generating 99.5%and 99.2%validation and training accuracy respectively.The auto-encoder model also produces 85.1%and 84.2%validation and training accuracies.Moreover the IoU metric of the segmented images is found to be of 0.77 value.The experimental results reveal that the model is accu-rate and can be implemented for automatic ship detection in water bodies consid-ering remote sensing satellite images as input to the computer vision system.

Prediction Model of Aircraft Icing Based on Deep Neural Network

Icing is an important factor threatening aircraft flight safety.According to the requirements of airworthiness regulations,aircraft icing safety assessment is needed to be carried out based on the ice shapes formed under different icing conditions.Due to the complexity of the icing process,the rapid assessment of ice shape remains an important challenge.In this paper,an efficient prediction model of aircraft icing is established based on the deep belief network(DBN)and the stacked auto-encoder(SAE),which are all deep neural networks.The detailed network structures are designed and then the networks are trained according to the samples obtained by the icing numerical computation.After that the model is applied on the ice shape evaluation of NACA0012 airfoil.The results show that the model can accurately capture the nonlinear behavior of aircraft icing and thus make an excellent ice shape prediction.The model provides an important tool for aircraft icing analysis.

Deep Learning Based Face Detection and Identification of Criminal Suspects

Occurrence of crimes has been on the constant rise despite the emerging discoveries and advancements in the technological field in the past decade.One of the most tedious tasks is to track a suspect once a crime is committed.As most of the crimes are committed by individuals who have a history of felonies,it is essential for a monitoring system that does not just detect the person’s face who has committed the crime,but also their identity.Hence,a smart criminal detection and identification system that makes use of the OpenCV Deep Neural Network(DNN)model which employs a Single Shot Multibox Detector for detection of face and an auto-encoder model in which the encoder part is used for matching the captured facial images with the criminals has been proposed.After detection and extraction of the face in the image by face cropping,the captured face is then compared with the images in the CriminalDatabase.The comparison is performed by calculating the similarity value between each pair of images that are obtained by using the Cosine Similarity metric.After plotting the values in a graph to find the threshold value,we conclude that the confidence rate of the encoder model is 0.75 and above.

Intrusion Detection through DCSYS Propagation Compared to Auto-encoders

In network settings,one of the major disadvantages that threaten the network protocols is the insecurity.In most cases,unscrupulous people or bad actors can access information through unsecured connections by planting software or what we call malicious software otherwise anomalies.The presence of anomalies is also one of the disadvantages,internet users are constantly plagued by virus on their system and get activated when a harmless link is clicked on,this a case of true benign detected as false.Deep learning is very adept at dealing with such cases,but sometimes it has its own faults when dealing benign cases.Here we tend to adopt a dynamic control system(DCSYS)that addresses data packets based on benign scenario to truly report on false benign and exclude anomalies.Its performance is compared with artificial neural network auto-encoders to define its predictive power.Results show that though physical systems can adapt securely,it can be used for network data packets to identify true benign cases.

Fault diagnosis for distillation process based on CNN–DAE

Distillation is the most widely used operation for liquid mixture separation in the chemical industry. It is of great importance to detect and diagnose faults in distillation process. Due to the strong feedback and coupling of processes in a distillation column, it is difficult to use deep auto-encoders(DAEs) alone to achieve good results in detecting and diagnosing faults, in terms of accuracy and efficiency. This paper proposes a hybrid fault-diagnosis model based on convolutional neural networks(CNNs) and DAEs, by integrating the powerful capability of CNN in feature extraction and of DAE in classification. A case study was carried out with the distillation process of depropanization. It is shown that the proposed hybrid model is of good performance compared to other models, in terms of the accuracy of fault detection in such a process. Also, with the increase of structural layers of the CNN–DAE model, the diagnostic accuracy will be improved, with an optimal accuracy of 92.2%.

Hformer:highly efficient vision transformer for low-dose CT denoising

In this paper,we propose Hformer,a novel supervised learning model for low-dose computer tomography(LDCT)denoising.Hformer combines the strengths of convolutional neural networks for local feature extraction and transformer models for global feature capture.The performance of Hformer was verified and evaluated based on the AAPM-Mayo Clinic LDCT Grand Challenge Dataset.Compared with the former representative state-of-the-art(SOTA)model designs under different architectures,Hformer achieved optimal metrics without requiring a large number of learning parameters,with metrics of33.4405 PSNR,8.6956 RMSE,and 0.9163 SSIM.The experiments demonstrated designed Hformer is a SOTA model for noise suppression,structure preservation,and lesion detection.

Improved deep mixed kernel randomized network for wind speed prediction

Forecasting wind speed is an extremely complicated and challenging problem due to its chaotic nature and its dependence on several atmospheric conditions.Although there are several intelligent techniques in the literature for wind speed prediction,their accuracies are not yet very reliable.Therefore,in this paper,a new hybrid intelligent technique named the deep mixed kernel random vector functional-link network auto-encoder(AE)is proposed for wind speed prediction.The proposed method eliminates manual tuning of hidden nodes with random weights and biases,providing prediction model generalization and representation learning.This reduces reconstruction error due to the exact inversion of the kernel matrix,unlike the pseudo-inverse in a random vector functional-link network,and short-ens the execution time.Furthermore,the presence of a direct link from the input to the output reduces the complexity of the prediction model and improves the prediction accuracy.The kernel parameters and coefficients of the mixed kernel system are optimized using a new chaotic sine–cosine Levy flight optimization technique.The lowest errors in terms of mean absolute error(0.4139),mean absolute percentage error(4.0081),root mean square error(0.4843),standard deviation error(1.1431)and index of agreement(0.9733)prove the efficiency of the proposed model in comparison with other deep learning models such as deep AEs,deep kernel extreme learning ma-chine AEs,deep kernel random vector functional-link network AEs,benchmark models such as least square support vector machine,autoregressive integrated moving average,extreme learning machines and their hybrid models along with different state-of-the-art methods.

Early Detection of Heartbeat from Multimodal Data Using RPA Learning with KDNN-SAE

Heartbeat detection stays central to cardiovascular an electrocardiogram(ECG)is used to help with disease diagnosis and management.Existing Convolutional Neural Network(CNN)-based methods suffer from the less generalization problem thus;the effectiveness and robustness of the traditional heartbeat detector methods cannot be guaranteed.In contrast,this work proposes a heartbeat detector Krill based Deep Neural Network Stacked Auto Encoders(KDNN-SAE)that computes the disease before the exact heart rate by combining features from multiple ECG Signals.Heartbeats are classified independently and multiple signals are fused to estimate life threatening conditions earlier without any error in classification of heart beat.This work contained Training and testing stages,in the preparation part at first the Adaptive Filter Enthalpy-based Empirical Mode Decomposition(EMD)is utilized to eliminate the motion artifact in the signal.At that point,the robotic process automation(RPA)learning part extracts the effective features are extracted,and normalized the value of the feature then estimated utilizing the RPA loss function.At last KDNN-SAE prepared training for the data stored in the dataset.In the subsequent stage,input signal compute motion artifact and RPA Learning the evaluation part determines the detection of Heartbeat.So early diagnosis of heart failures is an essential factor.The results of the experiments show that our proposed method has a high score outcome of 0.9997.Comparable to the CIF,which reaches 0.9990.The CNN and Artificial Neural Network(ANN)had less score 0.95115 and 0.90147.

基于深度神经网络的有色金属领域实体识别

针对有色金属领域实体识别问题,提出一种基于深度神经网络(deep neural network,DNN)架构的有色金属领域实体识别方法.为能有效获取有色金属领域实体中字符间的紧密结合特征,并回避专业领域中文分词问题,使用神经网络的方法自动学习中文字符embeddings向量化表示作为模型输入.基于降噪自动编码器(denoising autoencoder,DAE)对深度神经网络的每个隐层进行逐层预训练获取用于有色金属领域实体识别的最优特征向量组合,并详细介绍了基于神经语言模型的文本窗口降噪自动编码器预训练及有色金属实体识别的深层网络构建过程.为验证方法的有效性,对有色金属领域产品名、矿产名、地名、组织机构4类实体识别进行实验.实验结果表明,提出的方法对于专业领域的实体识别具有较好的效果.

深度自动编码器的研究与展望

深度学习是机器学习的一个分支,开创了神经网络发展的新纪元。作为深度学习结构的主要组成部分之一,深度自动编码器主要用于完成转换学习任务,同时在无监督学习及非线性特征提取过程中也扮演着至关重要的角色。首先介绍深度自动编码器的发展由来、基本概念及原理,然后介绍它的构建方法以及预训练和精雕的一般步骤,并对不同类型深度自动编码器进行总结,最后在深入分析深度自动编码器目前存在的问题的基础上,对其未来发展趋势进行展望。

基于自动编码器组合的深度学习优化方法

为了提高自动编码器算法的学习精度,更进一步降低分类任务的分类错误率,提出一种组合稀疏自动编码器(SAE)和边缘降噪自动编码器(m DAE)从而形成稀疏边缘降噪自动编码器(Sm DAE)的方法,将稀疏自动编码器和边缘降噪自动编码器的限制条件加载到一个自动编码器(AE)之上,使得这个自动编码器同时具有稀疏自动编码器的稀疏性约束条件和边缘降噪自动编码器的边缘降噪约束条件,提高自动编码器算法的学习能力。实验表明,稀疏边缘降噪自动编码器在多个分类任务上的学习精度都高于稀疏自动编码器和边缘降噪自动编码器的分类效果;与卷积神经网络(CNN)的对比实验也表明融入了边缘降噪限制条件,而且更加鲁棒的Sm DAE模型的分类精度比CNN还要好。

基于深度自编码网络语音识别噪声鲁棒性研究

为了解决传统径向基(Radial basis function,RBF)神经网络在语音识别任务中基函数中心值和半径随机初始化的问题,从人脑对语音感知的分层处理机理出发,提出利用大量无标签数据初始化网络参数的无监督预训练方式代替传统随机初始化方法,使用深度自编码网络作为语音识别的声学模型,分析梅尔频率倒谱系数(Mel Frequency Cepstrum Coefficient,MFCC)和基于Gammatone听觉滤波器频率倒谱系数(Gammatone Frequency Cepstrum Coefficient,GFCC)下非特定人小词汇量孤立词的抗噪性能。实验结果表明,深度自编码网络在MFCC特征下较径向基神经网络表现出更优越的抗噪性能;而与经典的MFCC特征相比,GFCC特征在深度自编码网络下平均识别率相对提升1.87%。

基于自编码压缩与多尺度特征提取的抽水蓄能机组劣化趋势评估与预测

恶劣的运行环境为抽水蓄能机组安全运行带来严峻挑战,抽水蓄能机组劣化趋势评估与预测技术能够有效反映机组运行状况并预测机组未来劣化情况,为机组状态检修提供重要依据。然而,机组运行工况参数中存在大量冗余或干扰信息,严重影响劣化趋势评估的可靠性;此外,难以对复杂的劣化趋势序列实现准确的预测。为解决上述问题,提出一种基于自编码压缩与多尺度特征提取的抽水蓄能机组劣化评估预测模型。首先,为降低拟合误差,利用深度自编码器(DAE)凝练工况参数中的关键信息,结合多层感知机(MLP)建立健康模型;其次,根据机组运行数据与健康模型,生成机组劣化度;最后,以一维卷积神经网络(1DCNN)提取局部空间特征,以双向门控循环单元(BiGRU)提取双向全局时序特征,结合二者的优势,构建多尺度特征提取网络,实现精确的劣化趋势预测。通过某抽水蓄能机组验证了该模型的有效性。与其他模型相比,自编码压缩模型的拟合误差最低,能够生成可靠的劣化趋势;多尺度特征提取网络能够学习劣化趋势序列中的长期趋势与局部波动信息,预测精度更高。

基于稀疏自动编码器的深度神经网络实现

在神经网络的监督学习中,需要大量人工标识特征的训练样本集。学习系统的成功依赖于样本标识特征的准确性,但人工标识特征费时费力,人为因素决定的特征通用性较差。稀疏自编码器是一种无监督学习方法,可以通过对无标记样本的学习,自动提取样本特征。对稀疏自编码器进行仿真,证明它可以很好地提取输入的无标记样本的特征,这将极大地提高机器学习系统的应用范围和准确性。