Enhancing Healthcare Data Security and Disease Detection Using Crossover-Based Multilayer Perceptron in Smart Healthcare Systems

The healthcare data requires accurate disease detection analysis,real-timemonitoring,and advancements to ensure proper treatment for patients.Consequently,Machine Learning methods are widely utilized in Smart Healthcare Systems(SHS)to extract valuable features fromheterogeneous and high-dimensional healthcare data for predicting various diseases and monitoring patient activities.These methods are employed across different domains that are susceptible to adversarial attacks,necessitating careful consideration.Hence,this paper proposes a crossover-based Multilayer Perceptron(CMLP)model.The collected samples are pre-processed and fed into the crossover-based multilayer perceptron neural network to detect adversarial attacks on themedical records of patients.Once an attack is detected,healthcare professionals are promptly alerted to prevent data leakage.The paper utilizes two datasets,namely the synthetic dataset and the University of Queensland Vital Signs(UQVS)dataset,from which numerous samples are collected.Experimental results are conducted to evaluate the performance of the proposed CMLP model,utilizing various performancemeasures such as Recall,Precision,Accuracy,and F1-score to predict patient activities.Comparing the proposed method with existing approaches,it achieves the highest accuracy,precision,recall,and F1-score.Specifically,the proposedmethod achieves a precision of 93%,an accuracy of 97%,an F1-score of 92%,and a recall of 92%.

A Multilayer Perceptron Artificial Neural Network Study of Fatal Road Traffic Crashes

This paper examines the relationship between fatal road traffic accidents and potential predictors using multilayer perceptron artificial neural network (MLANN) models. The initial analysis employed twelve potential predictors, including traffic volume, prevailing weather conditions, roadway characteristics and features, drivers’ age and gender, and number of lanes. Based on the output of the model and the variables’ importance factors, seven significant variables are identified and used for further analysis to improve the performance of models. The model is optimized by systematically changing the parameters, including the number of hidden layers and the activation function of both the hidden and output layers. The performances of the MLANN models are evaluated using the percentage of the achieved accuracy, R-squared, and Sum of Square Error (SSE) functions.

A Hybrid Learning Method for Multilayer Perceptrons

A Newton learning method for a neural network of multilayer perceptrons is proposed in this paper. Furthermore, a hybrid learning method id legitimately developed in combination of the backpropagation method proposed by Rumelhart et al with the Newton learning method. Finally, the hybrid learning algorithm is compared with the backpropagation algorithm by some illustrations, and the results show that this hybrid leaming algorithm bas the characteristics of rapid convergence.

Preliminary Biometrics of ECG Signal Based on Temporal Organization through the Implementation of a Multilayer Perceptron Neural Network

The attributes of the ECG signal signifying the unique electrical properties of the heart offer the opportunity to expand the realm of biometrics, which pertains the identification of an individual based on physical characteristics. The temporal organization of the ECG signal offers a basis for composing a machine learning feature set. The four attributes of the feature set are derived through software automation enabled by Python. These four attributes are the temporal differential of the P wave maximum and T wave maximum relative to the R wave maximum and the Q wave minimum and S wave minimum relative to the R wave maximum. The multilayer perceptron neural network was applied and evaluated in terms of classification accuracy and time to develop the model. Superior performance was achieved with respect to a reduced feature set considering only the temporal differential of the P wave maximum and T wave maximum relative to the R wave maximum by comparison to all four attributes applied to the feature set and the temporal differential of the Q wave minimum and S wave minimum relative to the R wave maximum. With these preliminary findings and the advent of portable and wearable devices for the acquisition of the ECG signal, the temporal organization of the ECG signal offers robust potential for the field of biometrics.

ERROR RESPONSE AND ROBUSTNESS OF A CLASS OF MULTILAYERED PERCEPTRONS WITH THRESHOLD FUNCTIONS

In this paper, based on a stochastic mode! for inputs and weights, and in view of the disturbance of correlative and large input and weight errors, a general algorithm to obtain the output error characteristics of a class of multilayered perceptrons with threshold functions is proposed by using statistical approach. Furthermore, the formula to calculate the robustness of the networks is also given. The result of computer simulation indicates the correctness of the algorithm.

Updated Lithological Map in the Forest Zone of the Centre, South and East Regions of Cameroon Using Multilayer Perceptron Neural Network and Landsat Images

The Multilayer Perceptron Neural Network (MLPNN) induction technique has been successfully applied to a variety of machine learning tasks, including the extraction and classification of image features. However, not much has been done in the application of MLPNN on images obtained by remote sensing. In this article, two automatic classification systems used in image feature extraction and classification from remote sensing data are presented. The first is a combination of two models: a MLPNN induction technique, integrated under ENVI (Environment for Visualizing Images) platform for classification, and a pre-processing model including dark subtraction for the calibration of the image, the Principal Components Analysis (PCA) for band selections and Independent Components Analysis (ICA) as blind source separator for feature extraction of the Landsat image. The second classification system is a MLPNN induction technique based on the Keras platform. In this case, there was no need for pre-processing model. Experimental results show the two classification systems to outperform other typical feature extraction and classification methods in terms of accuracy for some lithological classes including Granite1 class with the highest class accuracies of 96.69% and 92.69% for the first and second classification system respectively. Meanwhile, the two classification systems perform almost equally with the overall accuracies of 53.01% and 49.98% for the first and second models respectively though the keras model has the advantage of not integrating the pre-processing model, hence increasing its efficiency. The application of these two systems to the study area resulted in the generation of an updated geological mapping with six lithological classes detected including the Gneiss, the Micaschist, the Schist and three versions of Granites (Granite1, Granite2 and Granite3).

SSA-MLP模型在岩质边坡稳定性预测中的应用

岩质边坡的力学参数量化及稳定性分析对岩质边坡灾害的防治具有重要意义。Hoek-Brown(H B)准则是一种用于确定岩体力学参数的经典方法,能反映出边坡岩体变形和位移的非线性破坏特征。在此基础上,首先,提出一种麻雀搜索算法(Sparrow Search Algorithm,SSA)改进多层感知器(Multi-Layer Perceptron,MLP)的神经网络模型,并用于边坡稳定性预测、指标敏感性分析及参数反演。其次,将收集的1085组岩质边坡的几何参数和H B准则参数等作为输入变量,极限平衡理论Bishop法求解的安全系数作为输出变量,对SSA MLP模型进行训练学习和性能评估。最后,将该模型运用于25个边坡实例,验证模型的有效性。结果显示,该模型收敛速度快、精度高,为边坡稳定性分析和参数量化提供了一种新思路。

基于MLP的伪装语音说话人性别鉴定

文中提出了一种基于神经网络的伪装语音说话人识别模型,用以实现从共振峰的中心频率、带宽、音强等参数识别伪装语音说话人的性别。该模型以多层感知机(Multi-Layer Perceptron,MLP)为框架,经全连接的非线性堆叠计算获取识别结果,并在模型的训练阶段采用L-BFGS进行优化参数的求解。实验中采用SoundTouch对男性和女性的自然语音进行伪装,探讨了网络结构与激活函数对该模型的影响,以及该识别模型对不同电子伪装手段的适应能力。实验结果表明,基于MLP的识别模型能高效区分采用不同电子伪装手段伪装后的语音对应的说话人的性别。

基于MLP的海上无人跨域协同效能评估系统的设计与实现

针对海上无人协同跨域系统的探测能力效能评估问题,需开展评估指标、评估算法等研究。将机器人自身参数与环境参数结合构建了评价指标计算模型,如探测覆盖率、重复探测率、单位面积上的像素数量、能量等指标和海上无人跨域协同系统探测能力指标评价体系,降低了评估过程中的主观性,采用ADC(availability dependability capability)法结合层次分析法生成训练数据,利用MLP(multilayer perceptron)神经网络法客观地衡量系统的效能,结果表明:生成的数据集规模达到2万,该模型评估误差在3%以下,验证了其有效性和适用性;利用PyQt5框架搭建了评估系统界面,实现了环境建模、数据录入、效能评估的功能。

Multi-layer perceptron-based data-driven multiscale modelling of granular materials with a novel Frobenius norm-based internal variable

One objective of developing machine learning(ML)-based material models is to integrate them with well-established numerical methods to solve boundary value problems(BVPs).In the family of ML models,recurrent neural networks(RNNs)have been extensively applied to capture history-dependent constitutive responses of granular materials,but these multiple-step-based neural networks are neither sufficiently efficient nor aligned with the standard finite element method(FEM).Single-step-based neural networks like the multi-layer perceptron(MLP)are an alternative to bypass the above issues but have to introduce some internal variables to encode complex loading histories.In this work,one novel Frobenius norm-based internal variable,together with the Fourier layer and residual architectureenhanced MLP model,is crafted to replicate the history-dependent constitutive features of representative volume element(RVE)for granular materials.The obtained ML models are then seamlessly embedded into the FEM to solve the BVP of a biaxial compression case and a rigid strip footing case.The obtained solutions are comparable to results from the FEM-DEM multiscale modelling but achieve significantly improved efficiency.The results demonstrate the applicability of the proposed internal variable in enabling MLP to capture highly nonlinear constitutive responses of granular materials.

融合多尺度MLP和边缘细化的遥感影像建筑物提取

针对高分辨率遥感影像中建筑物尺度变化大、干扰因素多和被遮挡等问题导致的错误分割,提出一种融合多尺度MLP和边缘细化的遥感影像建筑物提取方法。结合局部多层感知器与全局多层感知器提高模型对于影像中不同区域的理解能力和感知能力,弱化背景无关元素的干扰;通过获取不同层次特征图的边缘增强图,实现建筑物轮廓的精细化;设计一个对输出预测图进行特征级深度监督模块来兼顾定位精度和边缘精度,进一步提高分割效果。实验结果表明,所提算法在WHU和Inria Aerial Image Labeling数据集上的precision、recall、F1-score和IoU分别达到了96.18%、95.74%、95.96%、91.82%与91.37%、89.66%、90.51%、82.79%,对比其他相关算法,精度在不同程度提升的同时也保持了较低的参数量和计算量,为准确、快速地提取光学高分辨率遥感影像中的建筑物信息提供了有力支持。

基于MLP神经网络的中国南方地区多因子PWV预测模型

针对利用全球导航卫星系统(global navigation satellite system,GNSS)反演高精度大气可降水量(precipitable water vapor,PWV)时需要获取大气加权平均温度(Tm)从而影响结果精度的问题,在充分探究PWV与对流层天顶湿延迟(zenith wet delay,ZWD)等诸多因子相关性的基础上,利用中国南方地区40个探空站在2015—2017年的探空数据,基于多层感知器(multi layer perceptron,MLP)神经网络及多元回归拟合算法分别建立预测PWV的MLP模型、线性回归(linear regression,LR)模型与非线性回归(non-linear regression,NLR)模型。为充分探究2种建模方法对PWV精度的影响,利用2018年探空数据为参考值进行模型精度检验,并与传统PWV预测模型(PWV-SC2模型)进行精度对比分析。结果表明:MLP模型的年均均方根误差(RMSE)、偏差(bias)和相对误差(RE)分别为0.66 mm、0.06 mm和2.18%,相比LR模型和NLR模型年均RMSE分别降低了0.11 mm(14.6%)和0.17 mm(20.5%),年均bias分别降低了0.04 mm(43.7%)和0.28 mm(82.3%),年均RE分别降低了50.7%和57.3%;相比PWV-SC2模型,年均RMSE和bias分别降低了0.17 mm(20.5%)和0.15 mm(71.4%),年均RE降低了47.7%。因此,MLP模型在中国南方地区有较好的精度及适应性,可应用于中国南方地区高精度PWV预测。

肾病综合征患者他克莫司血药浓度监测及MLP预测模型建立

目的考察肾病综合征(NS)患者使用他克莫司后的血药浓度监测情况,同时建立他克莫司血药浓度预测模型。方法收集厦门大学附属中山医院2020年1月1日至2023年8月31日166例NS患者使用他克莫司的血药浓度监测数据(共计509次),并对其疗效、药物不良反应(ADR)与血药浓度的相关性进行分析。利用其中109例含有基因信息的NS患者的302次血药浓度监测数据建立多层感知机(MLP)预测模型,并对其进行验证。结果在疗效方面,未缓解组患者的中位血药浓度为2.20 ng/mL,显著低于部分缓解组的4.00 ng/mL(P<0.001)和完全缓解组的3.60 ng/mL(P=0.002)。在ADR方面,发生ADR组患者的中位血药浓度为5.01 ng/mL,显著高于未发生ADR组的3.37 ng/mL(P=0.001),且经受试者工作特征曲线亚组分析后可知,他克莫司血药浓度≥6.65 ng/mL时,患者更易发生血肌酐升高[曲线下面积(AUC)为0.764,P<0.001];他克莫司血药浓度≥6.55 ng/mL时,患者更易发生血糖升高(AUC=0.615,P=0.005)。所建立的MLP预测模型的损失函数值为0.9,预测值与实测值的平均误差绝对值为0.2795ng/mL,验证散点图的决定系数为0.984,说明模型取得了良好的预测效果。结论他克莫司血药浓度对NS患者的疗效和ADR均有影响。利用MLP模型进行血药浓度预测的准确率高,预测值与实测值之间误差小,该模型可作为临床个体化用药方案中的重要工具。

基于EWT和NeuralProphet-MLP的蜂窝网络流量长期预测方法

蜂窝网络流量长期预测对网络扩展和优化具有重要意义,针对长期预测中数据可用性低以及非线性等弊端所带来的诸多挑战,提出一种基于分解的分频预测模型。分别采用NeuralProphet模型和多层感知机对分解出的低频分量和中高频分量进行预测,最后对各分量预测结果进行逆经验小波变换得到最终结果。在真实的蜂窝网络流量数据集上进行验证,结果表明所提方法相较于传统预测模型在准确度上有较大提升,具有较好的应用价值。

基于MLP和多头自注意力特征融合的双模态情感计算模型

针对情感计算中传统的单模态情感分析通常存在分类准确率不高和不同语言环境间泛化能力较差的问题,提出一种双模态情感计算模型,以同时使用包含中英文两种语言、两种不同模态的情感数据。首先,利用多层感知机(MLP)网络和双向长短时记忆(BiLSTM)网络对数据进行特征提取;其次,基于MLP和自注意力机制分别对提取的特征进行特征融合,得到多模态分析模型;最后,使用该模型在构建的包含中英文两种语言数据的数据集上进行二分类情感计算预测。实验结果表明,所提模型相较于次优的BiLSTM模型,精度提高了1.22%;相较于单模态情感计算模型,精度提高了6.21%~14.00%。

基于MLP-Bagging的PCB电热耦合建模方法

随着三维集成电路性能的提高和复杂程度的增加,印制电路板(PCB)的散热问题日益突出。研究了PCB在电热多物理场相互作用下各部件的发热情况,提出了基于混合激活函数的多层感知机(MLP)-Bagging多物理参数算法。通过使用ReLU和Sigmoid两个激活函数进行学习和训练,建立了精度更高的MLP模型。之后,结合Bagging算法构建多个并行的MLP模型。所提出的神经网络多物理模型可以快速准确地预测PCB的电热响应。实验结果表明,此方法与有限元法相比,可以节省约97%的计算内存和99%的计算时间,与传统神经网络如随机森林(RF)、长短时记忆(LSTM)网络、MLP相比,该方法表现优良且泛化能力较好,为提高PCB设计效率提供了一种可行方法,为PCB热分析提供了更高效的解决方法。

基于WP-MLP神经网络的VoIP自适应抖动缓冲算法

为解决抖动缓冲区播放延时和丢包之间的矛盾,实现缓冲区的动态调整使延时和丢包达到最优的平衡,提出一种基于WP-MLP神经网络的自适应抖动缓冲算法。首先,对抖动缓冲区的基本原理进行了分析并给出了丢包率与缓冲延时之间的函数关系;其次,提出了WP-MLP神经网络抖动缓冲算法的网络模型并对算法流程进行了分析;最后,通过VoIP网络仿真进行建模对比几种常用抖动缓冲算法,结果表明,本文所提算法能够在播放延时和丢包率之间保持更好的平衡,对缓冲区大小的动态调节表现出更优异的性能。

基于变分贝叶斯算法和MLP网络的后非线性混合盲源分离方法研究

传统的后非线性模型往往要求其后非线性函数是可逆的,否则无法进行源信号的分离。然而在实际中,这一要求并不完全满足。针对此不足,结合变分贝叶斯推论和多层感知器网络,提出一种改进的多层感知器后非线性模型,它通过多层感知器来模拟后非线性函数,实现对不可逆后非线性函数混合的盲分离。仿真和实验结果表明该方法是有效的。

基于GWO-MLP的光伏系统输出功率短期预测模型

准确预测光伏系统的输出功率对微网系统的优化调度具有重要意义。为了减小光伏系统输出功率短期预测误差,文中采用多层感知器(Multi Layer Perceptron, MLP)神经网络作为主要的预测载体,将光照强度、温度、风速数据作为MLP的输入,光伏系统的输出功率作为MLP的输出,采用光伏电站的历史数据对MLP进行训练,并针对MLP在初始化权重和偏置量中存在的随机性问题,提出运用改进灰狼算法(Grey Wolf Optimizer, GWO)对MLP的初始权重和偏置量进行优化,减小MLP随机初始化的误差。仿真结果显示,文中提出的GWO-MLP在均方误差(Mean Square Error, MSE)、均方根误差(Root Mean Square Error, RMSE)、平均绝对误差(Mean Absolute Error, MAE)方面较MLP、Elman神经网络、支持向量机(Support Vector Machine, SVM)、极限学习机(Extreme Learning Machine, ELM)都有明显提高,表明所提方法可以准确预测光伏系统的输出功率。

基于MLP改进型深度神经网络学习资源推荐算法

针对在线学习过程中出现的知识过载及传统推荐算法中存在的数据稀疏和冷启动问题,提出了一种基于多层感知机(MLP)的改进型深度神经网络学习资源推荐算法。该算法利用多层感知机对非线性数据处理的优势,将学习者特征和学习资源特征进行向量相乘的预测方式转换为输入多层感知机的方式,改进了DN-CBR神经网络推荐模型。为验证模型的有效性,以爱课程在线学习平台数据为样本构建数据集,通过对比实验表明,在该数据集上,改进后模型相较于DN-CBR模型在归一化折损累积增益和命中率指标上分别提升了1.2%和3%,有效地提高了模型的推荐性能。