Genetic Algorithms

遗传算法
  • 文章类型: Journal Article
    超分辨率荧光成像提供了前所未有的见解,彻底改变了我们对生物学的理解。特别是,局部等离子体结构照明显微镜(LPSIM)通过利用等离子体纳米天线阵列产生的亚衍射极限近场模式,实现了50nm空间分辨率的视频速率超分辨率成像。然而,LPSIM阵列的传统试错设计过程耗时且计算量大,限制了对优化设计的探索。这里,我们提出了一种结合深度学习和遗传算法的混合逆设计框架来完善LPSIM阵列。使用经过训练的卷积神经网络评估设计群体,多目标优化方法通过迭代和进化对其进行优化。仿真结果表明,优化后的LPSIM基板优于传统基板,表现出更高的重建精度,对噪声的鲁棒性,和更少的测量增加容忍度。该框架不仅证明了逆设计用于定制LPSIM基板的功效,而且还为在成像应用中探索新的等离子体纳米结构开辟了途径。
    Super-resolution fluorescence imaging has offered unprecedented insights and revolutionized our understanding of biology. In particular, localized plasmonic structured illumination microscopy (LPSIM) achieves video-rate super-resolution imaging with ∼50 nm spatial resolution by leveraging subdiffraction-limited nearfield patterns generated by plasmonic nanoantenna arrays. However, the conventional trial-and-error design process for LPSIM arrays is time-consuming and computationally intensive, limiting the exploration of optimal designs. Here, we propose a hybrid inverse design framework combining deep learning and genetic algorithms to refine LPSIM arrays. A population of designs is evaluated using a trained convolutional neural network, and a multiobjective optimization method optimizes them through iteration and evolution. Simulations demonstrate that the optimized LPSIM substrate surpasses traditional substrates, exhibiting higher reconstruction accuracy, robustness against noise, and increased tolerance for fewer measurements. This framework not only proves the efficacy of inverse design for tailoring LPSIM substrates but also opens avenues for exploring new plasmonic nanostructures in imaging applications.
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  • 文章类型: Journal Article
    这项研究探索了一种通过分析脑电图(EEG)信号来检测唤醒水平的新颖方法。利用来自18名健康参与者的数据的Faller数据库,我们采用64通道脑电图系统。
    我们采用的方法需要从每个通道中提取十个频率特性,为每个信号实例计算640维的特征向量。为了提高分类准确性,我们采用遗传算法进行特征选择,将其视为多目标优化任务。该方法利用快速比特跳变来提高效率,克服传统的位串限制。混合算子加快算法收敛,和解决方案选择策略识别最合适的特征子集。
    实验结果证明了该方法在检测不同状态的唤醒水平方面的有效性,随着准确性的提高,灵敏度,和特异性。在方案一,所提出的方法达到了平均精度,灵敏度,和93.11%的特异性,98.37%,99.14%,分别。在场景2中,平均值为81.35%,88.65%,和84.64%。
    获得的结果表明,所提出的方法在不同场景中具有很高的检测唤醒水平的能力。此外,已经证明了采用所提出的特征减少方法的优点。
    UNASSIGNED: This study explores a novel approach to detecting arousal levels through the analysis of electroencephalography (EEG) signals. Leveraging the Faller database with data from 18 healthy participants, we employ a 64-channel EEG system.
    UNASSIGNED: The approach we employ entails the extraction of ten frequency characteristics from every channel, culminating in a feature vector of 640 dimensions for each signal instance. To enhance classification accuracy, we employ a genetic algorithm for feature selection, treating it as a multiobjective optimization task. The approach utilizes fast bit hopping for efficiency, overcoming traditional bit-string limitations. A hybrid operator expedites algorithm convergence, and a solution selection strategy identifies the most suitable feature subset.
    UNASSIGNED: Experimental results demonstrate the method\'s effectiveness in detecting arousal levels across diverse states, with improvements in accuracy, sensitivity, and specificity. In scenario one, the proposed method achieves an average accuracy, sensitivity, and specificity of 93.11%, 98.37%, and 99.14%, respectively. In scenario two, the averages stand at 81.35%, 88.65%, and 84.64%.
    UNASSIGNED: The obtained results indicate that the proposed method has a high capability of detecting arousal levels in different scenarios. In addition, the advantage of employing the proposed feature reduction method has been demonstrated.
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  • 文章类型: Journal Article
    在现代制造业中,优化算法已成为提高加工技术效率和质量的关键工具。随着计算技术的进步和人工智能的发展,这些算法在加工过程的参数优化中起着越来越重要的作用。目前,响应面法的发展,遗传算法,Taguchi方法,粒子群优化算法相对成熟,在工艺参数优化中的应用相当广泛。它们越来越多地用作表面粗糙度的优化目标,地下损伤,切削力,和机械性能,加工和特殊加工。本文对优化算法在实际工程生产领域的应用和发展趋势进行了系统的回顾。它深入研究了分类,定义,以及工程制造过程中工艺参数优化算法的研究现状,国内和国际。此外,它提供了这些优化算法在实际场景中的具体应用的详细探索。优化算法的演变旨在增强未来制造业的竞争力,促进制造技术向更高的效率发展,可持续性和定制。
    In modern manufacturing, optimization algorithms have become a key tool for improving the efficiency and quality of machining technology. As computing technology advances and artificial intelligence evolves, these algorithms are assuming an increasingly vital role in the parameter optimization of machining processes. Currently, the development of the response surface method, genetic algorithm, Taguchi method, and particle swarm optimization algorithm is relatively mature, and their applications in process parameter optimization are quite extensive. They are increasingly used as optimization objectives for surface roughness, subsurface damage, cutting forces, and mechanical properties, both for machining and special machining. This article provides a systematic review of the application and developmental trends of optimization algorithms within the realm of practical engineering production. It delves into the classification, definition, and current state of research concerning process parameter optimization algorithms in engineering manufacturing processes, both domestically and internationally. Furthermore, it offers a detailed exploration of the specific applications of these optimization algorithms in real-world scenarios. The evolution of optimization algorithms is geared towards bolstering the competitiveness of the future manufacturing industry and fostering the advancement of manufacturing technology towards greater efficiency, sustainability, and customization.
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  • 文章类型: Journal Article
    本文探讨了复杂网络模型和遗传算法在流行病学建模中的应用。通过考虑小世界和巴拉巴西-阿尔伯特网络模型,我们的目标是复制城市环境中疾病传播的动态。这项研究强调了准确绘制个人联系人和社交网络以预测疾病进展的重要性。使用遗传算法,我们估计网络建设的输入参数,从而模拟这些网络中的疾病传播。我们的结果表明网络与真实的社交互动相似,突出了它们在预测疾病传播方面的潜力。这项研究强调了复杂网络模型和遗传算法在理解和管理公共卫生危机中的重要性。
    This paper explores the application of complex network models and genetic algorithms in epidemiological modeling. By considering the small-world and Barabási-Albert network models, we aim to replicate the dynamics of disease spread in urban environments. This study emphasizes the importance of accurately mapping individual contacts and social networks to forecast disease progression. Using a genetic algorithm, we estimate the input parameters for network construction, thereby simulating disease transmission within these networks. Our results demonstrate the networks\' resemblance to real social interactions, highlighting their potential in predicting disease spread. This study underscores the significance of complex network models and genetic algorithms in understanding and managing public health crises.
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  • 文章类型: Journal Article
    在本文中,我们的目标是通过集成基于生物生命周期的动态模型来增强遗传算法(GA)。这项研究通过纳入出生阶段来解决保持GA多样性和适应性的挑战,增长,繁殖,和死亡进入算法的框架。我们考虑生命周期阶段对人口中的个体的异步执行,确保稳态演进,在保持多样性的同时保留高质量的解决方案。实验结果表明,所提出的扩展优于传统的GA,并且在各种基准问题中与PSO和EvoSpace等其他知名和成熟的算法一样好或更好。特别是关于收敛速度和求解能力。该研究得出的结论是,将生物生命周期动力学纳入GA可以增强其稳健性和效率,为进化计算的未来研究提供了一个有希望的方向。
    In this paper, we aim to enhance genetic algorithms (GAs) by integrating a dynamic model based on biological life cycles. This study addresses the challenge of maintaining diversity and adaptability in GAs by incorporating stages of birth, growth, reproduction, and death into the algorithm\'s framework. We consider an asynchronous execution of life cycle stages to individuals in the population, ensuring a steady-state evolution that preserves high-quality solutions while maintaining diversity. Experimental results demonstrate that the proposed extension outperforms traditional GAs and is as good or better than other well-known and well established algorithms like PSO and EvoSpace in various benchmark problems, particularly regarding convergence speed and solution qu/ality. The study concludes that incorporating biological life-cycle dynamics into GAs enhances their robustness and efficiency, offering a promising direction for future research in evolutionary computation.
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  • 文章类型: Journal Article
    气体传感器的一个挑战是湿度干扰,由于动态湿度条件可能导致对分析物的响应信号发生不可预测的波动,增加定量检测误差。这里,我们介绍一个概念:从水池中选择湿度传感器来补偿每个气体传感器的湿度信号。与极端抑制湿度响应的传统方法相比,传感器池允许更准确的气体定量在更广泛的应用场景提供定制,高维湿度响应数据作为外在补偿。作为一个概念证明,通过三个步骤实现了比色气体定量中湿度干扰的缓解。首先,跨越十维变量空间,一个算法驱动的高通量实验机器人发现了多个局部最佳区域,在这些区域中,比色湿度传感公式对灵敏度具有很高的评价,可逆性,响应时间,和在室温(25°C)下10-90%相对湿度(RH)的颜色变化程度。第二,从局部最优区域,选择具有不同变量的91种传感配方来构建母体比色湿度传感器阵列作为湿度信号补偿的传感器池。第三,准最佳传感器子阵列被确定为定制的湿度信号补偿解决方案,适用于大约全动态湿度范围(10-90%RH)的不同气体传感场景,使用巧妙的组合优化策略,并获得了两个准确的定量检测:一个平均绝对百分比误差(MAPE)从4.4%降低到0.75%,另一个从5.48%降低到1.37%。此外,父传感器阵列出色的湿度选择性已针对10种气体进行了验证。这项工作证明了机器人辅助构建可定制的父比色传感器阵列以减轻气体定量中的湿度干扰的可行性和优越性。
    One challenge for gas sensors is humidity interference, as dynamic humidity conditions can cause unpredictable fluctuations in the response signal to analytes, increasing quantitative detection errors. Here, we introduce a concept: Select humidity sensors from a pool to compensate for the humidity signal for each gas sensor. In contrast to traditional methods that extremely suppress the humidity response, the sensor pool allows for more accurate gas quantification across a broader range of application scenarios by supplying customized, high-dimensional humidity response data as extrinsic compensation. As a proof-of-concept, mitigation of humidity interference in colorimetric gas quantification was achieved in three steps. First, across a ten-dimensional variable space, an algorithm-driven high-throughput experimental robot discovered multiple local optimum regions where colorimetric humidity sensing formulations exhibited high evaluations on sensitivity, reversibility, response time, and color change extent for 10-90% relative humidity (RH) in room temperature (25 °C). Second, from the local optimum regions, 91 sensing formulations with diverse variables were selected to construct a parent colorimetric humidity sensor array as the sensor pool for humidity signal compensation. Third, the quasi-optimal sensor subarrays were identified as customized humidity signal compensation solutions for different gas sensing scenarios across an approximately full dynamic range of humidity (10-90% RH) using an ingenious combination optimization strategy, and two accurate quantitative detections were attained: one with a mean absolute percentage error (MAPE) reduction from 4.4 to 0.75% and the other from 5.48 to 1.37%. Moreover, the parent sensor array\'s excellent humidity selectivity was validated against 10 gases. This work demonstrates the feasibility and superiority of robot-assisted construction of a customizable parent colorimetric sensor array to mitigate humidity interference in gas quantification.
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  • 文章类型: Journal Article
    对接方法可用于使用多种算法来预测两个或更多个分子相对于彼此的取向。它可以基于相互作用的物理原理,也可以使用来自数据库和模板的信息。这些方法的可用性取决于分子的类型和大小,将估计其相对方向。两个最重要的限制是(i)预测的计算成本和(ii)相似复合物的结构信息的可用性。总的来说,如果有足够的类似系统的信息,基于知识和基于模板的方法可以显着降低计算成本,同时提供高精度的预测。然而,如果有关系统拓扑及其合作伙伴之间的交互的信息很少,基于物理的方法更可靠,甚至是唯一的选择。在这一章中,知识-,模板-,和基于物理的方法将进行比较和简要讨论,提供其可用性的例子,特别强调基于物理的蛋白质,蛋白质,蛋白质肽,和UNRES粗粒模型中的蛋白质-富勒烯对接。
    Docking methods can be used to predict the orientations of two or more molecules with respect of each other using a plethora of various algorithms, which can be based on the physics of interactions or can use information from databases and templates. The usability of these approaches depends on the type and size of the molecules, whose relative orientation will be estimated. The two most important limitations are (i) the computational cost of the prediction and (ii) the availability of the structural information for similar complexes. In general, if there is enough information about similar systems, knowledge-based and template-based methods can significantly reduce the computational cost while providing high accuracy of the prediction. However, if the information about the system topology and interactions between its partners is scarce, physics-based methods are more reliable or even the only choice. In this chapter, knowledge-, template-, and physics-based methods will be compared and briefly discussed providing examples of their usability with a special emphasis on physics-based protein-protein, protein-peptide, and protein-fullerene docking in the UNRES coarse-grained model.
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  • 文章类型: Journal Article
    这项研究的目的是介绍一种通过将功能近红外光谱(fNIRS)研究分类为PD阳性或阴性来辅助诊断帕金森病(PD)的方法。fNIRS是一种非侵入性的光学信号模式,传达大脑的血液动力学反应,特别是大脑皮层中血氧合的变化;它作为辅助PD检测的工具的潜力值得探索,因为与其他神经影像学方法相比,它是非侵入性的且具有成本效益。除了fNIRS和机器学习的集成,这项工作的一个贡献是实现和测试了各种方法,以找到实现最高性能的实现。所有实现都使用逻辑回归模型进行分类。从每个参与者的fNIRS研究中提取了一组792个时间和光谱特征。在两个性能最好的实现中,使用特征排序技术的集合来选择减少的特征子集,随后用遗传算法将其缩小。实现最佳检测性能,我们的方法达到了100%的准确度,精度,和回忆,F1评分和曲线下面积(AUC)为1,使用14个特征。这大大促进了PD诊断,强调整合fNIRS和机器学习用于非侵入性PD检测的潜力。
    The purpose of this research is to introduce an approach to assist the diagnosis of Parkinson\'s disease (PD) by classifying functional near-infrared spectroscopy (fNIRS) studies as PD positive or negative. fNIRS is a non-invasive optical signal modality that conveys the brain\'s hemodynamic response, specifically changes in blood oxygenation in the cerebral cortex; and its potential as a tool to assist PD detection deserves to be explored since it is non-invasive and cost-effective as opposed to other neuroimaging modalities. Besides the integration of fNIRS and machine learning, a contribution of this work is that various approaches were implemented and tested to find the implementation that achieves the highest performance. All the implementations used a logistic regression model for classification. A set of 792 temporal and spectral features were extracted from each participant\'s fNIRS study. In the two best performing implementations, an ensemble of feature-ranking techniques was used to select a reduced feature subset, which was subsequently reduced with a genetic algorithm. Achieving optimal detection performance, our approach reached 100 % accuracy, precision, and recall, with an F1 score and area under the curve (AUC) of 1, using 14 features. This significantly advances PD diagnosis, highlighting the potential of integrating fNIRS and machine learning for non-invasive PD detection.
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  • 文章类型: Journal Article
    纳米结构脂质载体(NLC)由于其小尺寸和有效的药物装载能力而具有作为药物递送系统(DDS)的重要前景。NLC的表面功能化可以促进与特定细胞受体的相互作用,实现靶向细胞递送。甘露糖基化已成为增加纳米颗粒被巨噬细胞识别和内化能力的有价值的工具。然而,功能化NLC的设计和开发是一项复杂的任务,需要优化众多变量和步骤,使过程具有挑战性和耗时。此外,以前的研究没有集中在评估功能化效率。在这项工作中,混合人工智能技术被用来帮助设计载有甘露糖基化药物的NLC。结合模糊逻辑或遗传算法的人工神经网络用于理解颗粒形成过程并优化功能化过程中不同步骤的变量组合。甘露糖经过化学修饰,第一次,功能化效率的量化和优化。所提出的顺序方法使设计一个强大的程序,以获得稳定的甘露糖基化NLCs具有均匀的粒度分布,小粒径(<100nm),和相当大的正ζ电位(>20mV)。在建立的方案之后,在这些DDS的表面上掺入甘露糖实现>85%的官能化效率。这种高有效性应该增强巨噬细胞对NLC的识别和内化,从而促进慢性炎性疾病的治疗。
    Nanostructured lipid carriers (NLCs) hold significant promise as drug delivery systems (DDS) owing to their small size and efficient drug-loading capabilities. Surface functionalization of NLCs can facilitate interaction with specific cell receptors, enabling targeted cell delivery. Mannosylation has emerged as a valuable tool for increasing the ability of nanoparticles to be recognized and internalized by macrophages. Nevertheless, the design and development of functionalized NLC is a complex task that entails the optimization of numerous variables and steps, making the process challenging and time-consuming. Moreover, no previous studies have been focused on evaluating the functionalization efficiency. In this work, hybrid Artificial Intelligence technologies are used to help in the design of mannosylated drug loaded NLCs. Artificial neural networks combined with fuzzy logic or genetic algorithms were employed to understand the particle formation processes and optimize the combinations of variables for the different steps in the functionalization process. Mannose was chemically modified to allow, for the first time, functionalization efficiency quantification and optimization. The proposed sequential methodology has enabled the design of a robust procedure for obtaining stable mannosylated NLCs with a uniform particle size distribution, small particle size (< 100 nm), and a substantial positive zeta potential (> 20mV). The incorporation of mannose on the surfaces of these DDS following the established protocols achieved > 85% of functionalization efficiency. This high effectiveness should enhance NLC recognition and internalization by macrophages, thereby facilitating the treatment of chronic inflammatory diseases.
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  • 文章类型: Journal Article
    在这篇文章中,研究了与导波测量相关的实际问题:(1)PZT板执行器(NAC2013)胶合对产生的弹性波传播的影响,(2)PZT传感器附件的可重复性,和(3)评估比较对不同2D样品进行的激光多普勒振动测量(LDV)测量结果的可能性。在评估将导波现象应用于结构健康监测系统的可能性的背景下,考虑这些问题至关重要,例如,在土木工程中。在考试中,在钢I形截面试样的腹板上进行了实验室测试。标本的尺寸和形状的发展方式,使它们类似于土木工程结构中通常使用的元素。事实证明,当使用蜡粘合激发器时,所产生的波的振幅最高。这种连接类型的可重复性和耐久性是最弱的。由于这个原因,它不适合在实验室外实际使用。永久涂胶在激励器和试样之间提供了稳定的连接,但产生的信号振幅最低。在论文中,提出了一种致力于客观分析和比较在不同样品表面传播的弹性波的新方法。在这个过程中,遗传算法有助于确定新的坐标系,其中可以评估不同方向的波传播质量。
    In this article, the practical issues connected with guided wave measurement are studied: (1) the influence of gluing of PZT plate actuators (NAC2013) on generated elastic wave propagation, (2) the repeatability of PZT transducers attachment, and (3) the assessment of the possibility of comparing the results of Laser Doppler Vibrometry (LDV) measurement performed on different 2D samples. The consideration of these questions is crucial in the context of the assessment of the possibility of the application of the guided wave phenomenon to structural health-monitoring systems, e.g., in civil engineering. In the examination, laboratory tests on the web of steel I-section specimens were conducted. The size and shape of the specimens were developed in such a way that they were similar to the elements typically used in civil engineering structures. It was proved that the highest amplitude of the generated wave was obtained when the exciters were glued using wax. The repeatability and durability of this connection type were the weakest. Due to this reason, it was not suitable for practical use outside the laboratory. The permanent glue application gave a stable connection between the exciter and the specimen, but the generated signal had the lowest amplitude. In the paper, the new procedure dedicated to objective analysis and comparison of the elastic waves propagating on the surface of different specimens was proposed. In this procedure, the genetic algorithms help with the determination of a new coordinate system, in which the assessment of the quality of wave propagation in different directions is possible.
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