Brain signal analysis from electroencephalogram(EEG)recordings is the gold standard for diagnosing various neural disorders especially epileptic seizure.Seizure signals are highly chaotic compared to normal brain sign...Brain signal analysis from electroencephalogram(EEG)recordings is the gold standard for diagnosing various neural disorders especially epileptic seizure.Seizure signals are highly chaotic compared to normal brain signals and thus can be identified from EEG recordings.In the current seizure detection and classification landscape,most models primarily focus on binary classification—distinguishing between seizure and non-seizure states.While effective for basic detection,these models fail to address the nuanced stages of seizures and the intervals between them.Accurate identification of per-seizure or interictal stages and the timing between seizures is crucial for an effective seizure alert system.This granularity is essential for improving patient-specific interventions and developing proactive seizure management strategies.This study addresses this gap by proposing a novel AI-based approach for seizure stage classification using a Deep Convolutional Neural Network(DCNN).The developed model goes beyond traditional binary classification by categorizing EEG recordings into three distinct classes,thus providing a more detailed analysis of seizure stages.To enhance the model’s performance,we have optimized the DCNN using two advanced techniques:the Stochastic Gradient Algorithm(SGA)and the evolutionary Genetic Algorithm(GA).These optimization strategies are designed to fine-tune the model’s accuracy and robustness.Moreover,k-fold cross-validation ensures the model’s reliability and generalizability across different data sets.Trained and validated on the Bonn EEG data sets,the proposed optimized DCNN model achieved a test accuracy of 93.2%,demonstrating its ability to accurately classify EEG signals.In summary,the key advancement of the present research lies in addressing the limitations of existing models by providing a more detailed seizure classification system,thus potentially enhancing the effectiveness of real-time seizure prediction and management systems in clinical settings.With its inherent classifica展开更多
基于海洋工程平台项目特点,研究物资分类、物资编码和物资批次编码等关键技术,引入批次管理方法。按批次阶段形成亚批次清单(Bill of Lots, BOL),建立物资追溯管理模型,为海洋工程平台项目实现产品全生命周期内的物资追溯管理提供理论...基于海洋工程平台项目特点,研究物资分类、物资编码和物资批次编码等关键技术,引入批次管理方法。按批次阶段形成亚批次清单(Bill of Lots, BOL),建立物资追溯管理模型,为海洋工程平台项目实现产品全生命周期内的物资追溯管理提供理论依据。展开更多
针对间歇生产过程中的故障分类问题,为进一步研究故障所属类型,本文采用支持向量数据描述(support vector data description,SVDD)的方法.在多种类型的故障数据库基础上,应用SVDD建立对应故障种类的模型,利用核函数求出各个模型超球面半...针对间歇生产过程中的故障分类问题,为进一步研究故障所属类型,本文采用支持向量数据描述(support vector data description,SVDD)的方法.在多种类型的故障数据库基础上,应用SVDD建立对应故障种类的模型,利用核函数求出各个模型超球面半径;对于新的待分类故障样本,先考察其与各个种类模型超球面球心的距离,再比较此距离与半径的大小,进而确定故障所属类型,尤其是可能超出各个故障模型检测范围的待测故障样本,对其进行降幅重构迭代,确定其所属类型.该方法不但能够准确识别独立发生的故障,而且对于其他方法难以识别的多种并发的故障也能够有效地实现分类,应用于数值仿真和青霉素发酵过程实验中,验证了其有效性和准确性.展开更多
The prevalence of melanoma skin cancer has increased in recent decades.The greatest risk from melanoma is its ability to broadly spread throughout the body by means of lymphatic vessels and veins.Thus,the early diagno...The prevalence of melanoma skin cancer has increased in recent decades.The greatest risk from melanoma is its ability to broadly spread throughout the body by means of lymphatic vessels and veins.Thus,the early diagnosis of melanoma is a key factor in improving the prognosis of the disease.Deep learning makes it possible to design and develop intelligent systems that can be used in detecting and classifying skin lesions from visible-light images.Such systems can provide early and accurate diagnoses of melanoma and other types of skin diseases.This paper proposes a new method which can be used for both skin lesion segmentation and classification problems.This solution makes use of Convolutional neural networks(CNN)with the architecture two-dimensional(Conv2D)using three phases:feature extraction,classification and detection.The proposed method is mainly designed for skin cancer detection and diagnosis.Using the public dataset International Skin Imaging Collaboration(ISIC),the impact of the proposed segmentation method on the performance of the classification accuracy was investigated.The obtained results showed that the proposed skin cancer detection and classification method had a good performance with an accuracy of 94%,sensitivity of 92%and specificity of 96%.Also comparing with the related work using the same dataset,i.e.,ISIC,showed a better performance of the proposed method.展开更多
基金funded by the Researchers Supporting Program at King Saud University(RSPD2024R809).
文摘Brain signal analysis from electroencephalogram(EEG)recordings is the gold standard for diagnosing various neural disorders especially epileptic seizure.Seizure signals are highly chaotic compared to normal brain signals and thus can be identified from EEG recordings.In the current seizure detection and classification landscape,most models primarily focus on binary classification—distinguishing between seizure and non-seizure states.While effective for basic detection,these models fail to address the nuanced stages of seizures and the intervals between them.Accurate identification of per-seizure or interictal stages and the timing between seizures is crucial for an effective seizure alert system.This granularity is essential for improving patient-specific interventions and developing proactive seizure management strategies.This study addresses this gap by proposing a novel AI-based approach for seizure stage classification using a Deep Convolutional Neural Network(DCNN).The developed model goes beyond traditional binary classification by categorizing EEG recordings into three distinct classes,thus providing a more detailed analysis of seizure stages.To enhance the model’s performance,we have optimized the DCNN using two advanced techniques:the Stochastic Gradient Algorithm(SGA)and the evolutionary Genetic Algorithm(GA).These optimization strategies are designed to fine-tune the model’s accuracy and robustness.Moreover,k-fold cross-validation ensures the model’s reliability and generalizability across different data sets.Trained and validated on the Bonn EEG data sets,the proposed optimized DCNN model achieved a test accuracy of 93.2%,demonstrating its ability to accurately classify EEG signals.In summary,the key advancement of the present research lies in addressing the limitations of existing models by providing a more detailed seizure classification system,thus potentially enhancing the effectiveness of real-time seizure prediction and management systems in clinical settings.With its inherent classifica
文摘针对间歇生产过程中的故障分类问题,为进一步研究故障所属类型,本文采用支持向量数据描述(support vector data description,SVDD)的方法.在多种类型的故障数据库基础上,应用SVDD建立对应故障种类的模型,利用核函数求出各个模型超球面半径;对于新的待分类故障样本,先考察其与各个种类模型超球面球心的距离,再比较此距离与半径的大小,进而确定故障所属类型,尤其是可能超出各个故障模型检测范围的待测故障样本,对其进行降幅重构迭代,确定其所属类型.该方法不但能够准确识别独立发生的故障,而且对于其他方法难以识别的多种并发的故障也能够有效地实现分类,应用于数值仿真和青霉素发酵过程实验中,验证了其有效性和准确性.
基金The authors would like to thank the deanship of scientific research and Re-search Center for engineering and applied sciences,Majmaah University,Saudi Arabia,for their support and encouragementthe authors would like also to express deep thanks to our College(College of Science at Zulfi City,Majmaah University,AL-Majmaah 11952,Saudi Arabia)Project No.31-1439.
文摘The prevalence of melanoma skin cancer has increased in recent decades.The greatest risk from melanoma is its ability to broadly spread throughout the body by means of lymphatic vessels and veins.Thus,the early diagnosis of melanoma is a key factor in improving the prognosis of the disease.Deep learning makes it possible to design and develop intelligent systems that can be used in detecting and classifying skin lesions from visible-light images.Such systems can provide early and accurate diagnoses of melanoma and other types of skin diseases.This paper proposes a new method which can be used for both skin lesion segmentation and classification problems.This solution makes use of Convolutional neural networks(CNN)with the architecture two-dimensional(Conv2D)using three phases:feature extraction,classification and detection.The proposed method is mainly designed for skin cancer detection and diagnosis.Using the public dataset International Skin Imaging Collaboration(ISIC),the impact of the proposed segmentation method on the performance of the classification accuracy was investigated.The obtained results showed that the proposed skin cancer detection and classification method had a good performance with an accuracy of 94%,sensitivity of 92%and specificity of 96%.Also comparing with the related work using the same dataset,i.e.,ISIC,showed a better performance of the proposed method.
