Dynamic cascade model

  • 文章类型: Journal Article
    拷贝数变异(CNV)是癌症形成和进展的重要遗传驱动因素,使基于CNV的智能分类变得可行。然而,当前的机器学习和深度学习方法存在一些挑战,例如集成方法中的基分类器组合方案的设计和神经网络层的选择,这往往导致低精度。因此,开发了一种自适应双线性动态级联模型(Adap-BDCM),以进一步提高这些方法对CNV数据集进行智能分类的准确性和适用性。在这个模型中,引入了特征选择模块,以减轻冗余信息的干扰,提出了一种基于门控注意机制的双线性模型来提取更多有益的深度融合特征。此外,设计了一种自适应的基分类器选择方案,克服了人工设计基分类器组合的困难,增强了模型的适用性。最后,构造了一种具有属性召回子模块的新颖特征融合方案,有效避免陷入本地解决方案和丢失一些有价值的信息。大量实验表明,我们的Adap-BDCM模型在癌症分类中表现出最佳性能,阶段预测,和CNV数据集的复发。这项研究可以帮助医生更快更好地进行诊断。
    Copy number variation (CNV) is an essential genetic driving factor of cancer formation and progression, making intelligent classification based on CNV feasible. However, there are a few challenges in the current machine learning and deep learning methods, such as the design of base classifier combination schemes in ensemble methods and the selection of layers of neural networks, which often result in low accuracy. Therefore, an adaptive bilinear dynamic cascade model (Adap-BDCM) is developed to further enhance the accuracy and applicability of these methods for intelligent classification on CNV datasets. In this model, a feature selection module is introduced to mitigate the interference of redundant information, and a bilinear model based on the gated attention mechanism is proposed to extract more beneficial deep fusion features. Furthermore, an adaptive base classifier selection scheme is designed to overcome the difficulty of manually designing base classifier combinations and enhance the applicability of the model. Lastly, a novel feature fusion scheme with an attribute recall submodule is constructed, effectively avoiding getting stuck in local solutions and missing some valuable information. Numerous experiments have demonstrated that our Adap-BDCM model exhibits optimal performance in cancer classification, stage prediction, and recurrence on CNV datasets. This study can assist physicians in making diagnoses faster and better.
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  • 文章类型: Journal Article
    自然灾害很常见,对个人有潜在的有害影响,以及家庭成员之间的关系(亚当斯等人。,2015;保罗,2015).此外,看护人-,offspring-,和家庭层面的结果通常在灾难后相关。
    因此,需要进行纵向工作,以澄清严重灾害后此类结构之间的前瞻性关联。
    目前的研究包括1,271名青少年,调查了灾难暴露是否会影响青少年创伤后应激障碍(PTSD)症状。父母的痛苦,家庭亲子冲突和沟通,以及这些因素是否/如何随着时间的推移相互影响。这项研究使用了动态级联模型,包括2011年密苏里州和阿拉巴马州龙卷风的青少年(12-17岁)和护理人员。这些参与者是涉及基于网络的干预的更大研究的一部分。
    超过和超过协变量(即,青少年年龄,性别,种族,治疗,先前的创伤,青少年饮酒和抑郁症状,和家庭收入),灾难暴露更严重的家庭有青少年报告更多基线PTSD症状,护理人员在基线时报告更多痛苦.
    提供有形资源(例如,住房,食物,交通运输,基本财产)灾后家庭可以减少父母的痛苦和青少年PTSD症状。此外,减少青少年PTSD症状可能会改善父母与青少年之间的关系.
    Natural disasters are common and have potentially deleterious impacts on individuals, as well as on the relationships among family members (Adams et al., 2015; Paul, 2015). Additionally, caregiver-, offspring-, and family-level outcomes are often correlated following disaster.
    Thus, longitudinal work is needed to clarify the prospective associations among such constructs following severe disasters.
    The current study included 1,271 adolescents and investigated whether disaster exposure impacted adolescent posttraumatic stress disorder (PTSD) symptoms, parent distress, and family parent-child conflict and communication, as well as whether/how these factors influenced one another over time. This study used a dynamic cascade model and included adolescents (ages 12-17) and caregivers present for tornadoes in Missouri and Alabama in 2011. These participants were part of a larger study involving a web-based intervention.
    Over and above covariates (i.e., adolescent age, gender, race, treatment, prior trauma, adolescent alcohol use and depressive symptoms, and household income), families who experienced greater severity of disaster exposure had adolescents who reported more baseline PTSD symptoms and caregivers who reported more distress at baseline.
    Providing tangible resources (e.g., housing, food, transportation, essential possessions) to families post-disaster may reduce parent distress and adolescent PTSD symptoms. Additionally, reducing adolescent PTSD symptoms may prospectively improve relationships between parents and adolescents.
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