The nodes' dynamics are modeled by the chaotic characteristics of the Hindmarsh-Rose system. The network's inter-layer connections rely solely on two neurons originating from each layer. This model's premise of diverse coupling strengths across its layers allows for a study of the network's reaction to changes in the coupling strength of each layer. find more Consequently, projections of nodes across different coupling strengths are generated to determine the impact of the asymmetric coupling on network behaviors. Although the Hindmarsh-Rose model does not feature coexisting attractors, an asymmetry in its coupling structure is responsible for the generation of different attractor states. Each layer's single node is illustrated with bifurcation diagrams, showing how the dynamics react to shifting coupling parameters. For a deeper understanding of the network synchronization, intra-layer and inter-layer error computations are performed. find more Analyzing these errors demonstrates that the network synchronizes effectively only when the coupling is large and symmetrical.
Quantitative data extracted from medical images, a cornerstone of radiomics, is now crucial for diagnosing and categorizing diseases, including glioma. How to isolate significant disease-related elements from the abundant quantitative data that has been extracted poses a primary problem. A significant weakness of existing methods is their combination of low accuracy and a tendency toward overfitting. The MFMO method, a novel multiple-filter and multi-objective approach, aims to identify biomarkers that are both predictive and robust, facilitating disease diagnosis and classification. The identification of a small set of predictive radiomic biomarkers with reduced redundancy is achieved through the combination of multi-filter feature extraction and a multi-objective optimization-based feature selection model. In a case study of magnetic resonance imaging (MRI) glioma grading, we find 10 critical radiomic biomarkers effectively differentiating low-grade glioma (LGG) from high-grade glioma (HGG) in both training and test data. Based on these ten defining features, the classification model yields a training AUC of 0.96 and a test AUC of 0.95, signifying improved performance relative to existing strategies and previously characterized biomarkers.
Investigating a retarded van der Pol-Duffing oscillator with multiple delays is the focus of this article. In the initial phase, we will ascertain the conditions responsible for the occurrence of a Bogdanov-Takens (B-T) bifurcation around the trivial equilibrium point of the proposed system. The second-order normal form of the B-T bifurcation was calculated with the aid of center manifold theory. Subsequently, we proceeded to the derivation of the third-order normal form. In addition, we offer bifurcation diagrams for the Hopf, double limit cycle, homoclinic, saddle-node, and Bogdanov-Takens bifurcations. To fulfill the theoretical demands, the conclusion incorporates a significant amount of numerical simulations.
The statistical modeling and forecasting of time-to-event data is paramount in every applied sector. For the task of modeling and projecting such data sets, several statistical methods have been developed and implemented. The objectives of this paper include, firstly, statistical modeling and secondly, forecasting. We introduce a novel statistical model for time-to-event data, marrying the adaptable Weibull model with the Z-family method. The new Z flexible Weibull extension model, designated as Z-FWE, has its characteristics derived and explained in detail. Maximum likelihood procedures yield the estimators for the Z-FWE distribution. In a simulation study, the evaluation of estimators for the Z-FWE model is undertaken. To analyze the mortality rate of COVID-19 patients, the Z-FWE distribution is employed. Ultimately, to predict the COVID-19 dataset, machine learning (ML) methods, such as artificial neural networks (ANNs) and the group method of data handling (GMDH), are combined with the autoregressive integrated moving average (ARIMA) model. It has been observed from our data that machine learning techniques are more resilient and effective in forecasting than the ARIMA model.
Patients undergoing low-dose computed tomography (LDCT) experience a significant reduction in radiation exposure. Still, dose reductions inevitably yield an extensive proliferation of speckled noise and streak artifacts, resulting in significant impairment of the reconstructed images' integrity. LDCT image quality improvements are seen with the non-local means (NLM) approach. In the NLM approach, fixed directions within a set range are employed to identify similar blocks. However, the method's efficacy in removing unwanted noise is circumscribed. A region-adaptive non-local means (NLM) method for LDCT image denoising is developed and presented in this paper. The proposed methodology categorizes image pixels based on the image's edge characteristics. Based on the categorized data, the adaptive search window, block size, and filter smoothing parameter settings may differ across regions. The classification outcomes can be employed to filter the candidate pixels situated within the search window. Intuitionistic fuzzy divergence (IFD) can be used to adaptively modify the filter parameter. The proposed method's application to LDCT image denoising yielded better numerical results and visual quality than those achieved by several related denoising methods.
Protein post-translational modification (PTM), a crucial aspect of orchestrating diverse biological processes and functions, is prevalent in the mechanisms governing protein function across animal and plant kingdoms. At specific lysine residues within proteins, glutarylation, a post-translational modification, takes place. This modification is significantly linked to human conditions like diabetes, cancer, and glutaric aciduria type I. Therefore, the prediction of glutarylation sites is of exceptional clinical importance. The investigation of glutarylation sites resulted in the development of DeepDN iGlu, a novel deep learning prediction model utilizing attention residual learning and DenseNet. In this investigation, the focal loss function was employed instead of the conventional cross-entropy loss function to mitigate the significant disparity between positive and negative sample counts. DeepDN iGlu, a deep learning model leveraging one-hot encoding, displays a strong predictive capacity for glutarylation sites. Observed metrics on the independent test set include 89.29% sensitivity, 61.97% specificity, 65.15% accuracy, 0.33 Mathews correlation coefficient, and 0.80 area under the curve. The authors, to the best of their knowledge, report the first use of DenseNet in the process of predicting glutarylation sites. DeepDN iGlu, a web server, has been launched and is currently available at https://bioinfo.wugenqiang.top/~smw/DeepDN. Data on glutarylation site prediction is now more readily available through iGlu/.
The surge in edge computing adoption has triggered the exponential creation and accumulation of huge datasets from billions of edge devices. The endeavor to simultaneously optimize detection efficiency and accuracy when performing object detection on diverse edge devices is undoubtedly very challenging. Further research is needed to explore and enhance the collaboration between cloud and edge computing, addressing constraints like limited processing power, network congestion, and extended latency. For a resolution of these problems, we introduce a new, hybrid multi-model license plate detection method, optimized to balance efficiency and accuracy in the dual processes of edge-node and cloud-server license plate detection. A newly designed probability-driven offloading initialization algorithm is presented, which achieves not only reasonable initial solutions but also boosts the precision of license plate recognition. This work introduces an adaptive offloading framework based on a gravitational genetic search algorithm (GGSA). This framework comprehensively addresses influential factors including license plate detection time, queuing time, energy consumption, image quality, and accuracy. The enhancement of Quality-of-Service (QoS) is supported by the GGSA. Extensive investigations into our GGSA offloading framework showcase its proficiency in collaborative edge and cloud-based license plate identification tasks, exceeding the performance of rival methodologies. Execution of all tasks on a traditional cloud server (AC) is significantly outperformed by GGSA offloading, which achieves a 5031% performance increase in offloading. The offloading framework, furthermore, displays remarkable portability when making real-time offloading decisions.
For six-degree-of-freedom industrial manipulators, an algorithm for trajectory planning is introduced, incorporating an enhanced multiverse optimization (IMVO) approach, with the key objectives of optimizing time, energy, and impact. The multi-universe algorithm's robustness and convergence accuracy are superior to other algorithms when applying it to single-objective constrained optimization problems. find more Unlike the alternatives, it has the deficiency of slow convergence, often resulting in being trapped in local minima. This paper presents a methodology for enhancing the wormhole probability curve, integrating adaptive parameter adjustment and population mutation fusion, thereby accelerating convergence and augmenting global search capability. This paper modifies the MVO approach for multi-objective optimization, resulting in the derivation of the Pareto solution set. To construct the objective function, we adopt a weighted approach, and subsequently we optimize it via the IMVO method. The algorithm's performance, as demonstrated by the results, yields improved timeliness in the six-degree-of-freedom manipulator's trajectory operation under specific constraints, resulting in optimal times, reduced energy consumption, and minimized impact during trajectory planning.
This paper investigates the dynamical characteristics of an SIR model including a strong Allee effect and density-dependent transmission.