decoupling

解耦
  • 文章类型: Journal Article
    The protein dynamical transition at ~200 K, where the biomolecule transforms from a harmonic, non-functional form to an anharmonic, functional state, has been thought to be slaved to the thermal activation of dynamics in its surface hydration water. Here, by selectively probing the dynamics of protein and hydration water using elastic neutron scattering and isotopic labeling, we found that the onset of anharmonicity in the two components around 200 K is decoupled. The one in protein is an intrinsic transition, whose characteristic temperature is independent of the instrumental resolution time, but varies with the biomolecular structure and the amount of hydration, while the one of water is merely a resolution effect.
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  • 文章类型: Journal Article
    大规模,多样化,和高质量的数据是实现基于深度学习的目标检测识别算法的良好泛化的基础和关键。然而,现有的合成孔径雷达(SAR)图像智能增强方法面临着几个问题,包括训练不稳定,图像质量较差,缺乏物理可解释性,等。为了解决上述问题,提出了一种特征级SAR目标数据增强方法。首先,提出了一种增强型胶囊神经网络(CapsNet),并将其用于特征提取,解耦输入数据的属性信息。此外,使用基于注意力机制的属性解耦框架,这有利于实现更有效的特征表示。之后,解耦的属性特征,包括振幅,仰角,方位角,和形状,可以被扰动以增加特征的多样性。在此基础上,通过重构扰动特征来实现SAR目标图像的增强。与使用随机噪声作为输入的增强方法相比,该方法实现了已知分布输入到未知分布变化的映射。这种映射方法减少了输入信号和增强数据之间的相关距离,因此减少了对训练数据的需求。此外,我们在重建过程中结合了像素损失和感知损失,提高了增广SAR数据的质量。使用四个评估度量来进行真实和增强图像的评估。通过该方法生成的图像实现了21.6845的峰值信噪比(PSNR),3.7114的辐射分辨率(RL)和24.0654的动态范围(DR)。实验结果证明了该方法的优越性。
    Large-scale, diverse, and high-quality data are the basis and key to achieving a good generalization of target detection and recognition algorithms based on deep learning. However, the existing methods for the intelligent augmentation of synthetic aperture radar (SAR) images are confronted with several issues, including training instability, inferior image quality, lack of physical interpretability, etc. To solve the above problems, this paper proposes a feature-level SAR target-data augmentation method. First, an enhanced capsule neural network (CapsNet) is proposed and employed for feature extraction, decoupling the attribute information of input data. Moreover, an attention mechanism-based attribute decoupling framework is used, which is beneficial for achieving a more effective representation of features. After that, the decoupled attribute feature, including amplitude, elevation angle, azimuth angle, and shape, can be perturbed to increase the diversity of features. On this basis, the augmentation of SAR target images is realized by reconstructing the perturbed features. In contrast to the augmentation methods using random noise as input, the proposed method realizes the mapping from the input of known distribution to the change in unknown distribution. This mapping method reduces the correlation distance between the input signal and the augmented data, therefore diminishing the demand for training data. In addition, we combine pixel loss and perceptual loss in the reconstruction process, which improves the quality of the augmented SAR data. The evaluation of the real and augmented images is conducted using four assessment metrics. The images generated by this method achieve a peak signal-to-noise ratio (PSNR) of 21.6845, radiometric resolution (RL) of 3.7114, and dynamic range (DR) of 24.0654. The experimental results demonstrate the superior performance of the proposed method.
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  • 文章类型: Journal Article
    在稳定全球气候变化的同时,人类持续发展的努力取决于经济增长与化石燃料二氧化碳排放的“脱钩”。然而,对这种脱钩的评估通常依赖于基于生产的排放,这些都不考虑国际贸易中体现的排放量。然而,国际贸易可以极大地改变排放核算,重塑排放与经济增长之间的脱钩。这里,我们评估了159个国家的经济增长与不同排放账户的脱钩,并分析了脱钩的驱动因素。我们发现,在1995年至2015年期间,尽管有29个国家表现出领土排放的强烈脱钩(经济增长和排放减少),只有19个国家实现了经济增长,而其基于消费的排放量却有所下降。大多数发达国家已经实现了与国内商品和服务有关的排放脱钩,但尚未实现与进口商品和服务相关的排放脱钩。U检验证实,与消费型排放相比,消费型排放的国内组成部分与国内生产总值(GDP)增长的脱钩趋势更强,进口排放量继续上升,人均GDP没有相应下降,对解耦分析进行统计验证。此外,在经济增长和消费排放脱钩最严重的国家,一个关键驱动因素是由于技术进步而降低排放强度,尤其是进口商品和服务强度的降低。我们的结果揭示了使用基于消费的排放评估脱钩的重要性;成功的脱钩可能需要国际合作和贸易伙伴的协调缓解努力。
    Efforts to stabilize the global climate change while also continuing human development depend upon \"decoupling\" economic growth from fossil fuel CO2 emissions. However, evaluations of such decoupling have typically relied on production-based emissions, which do not account for emissions embodied in international trade. Yet international trade can greatly change emissions accounting and reshape the decoupling between emissions and economic growth. Here, we evaluate decoupling of economic growth from different accounts of emissions in each of the 159 countries and analyze the drivers of decoupling. We find that between 1995 and 2015, although 29 countries exhibited strong decoupling of territorial emissions (growing economies and decreasing emissions), only 19 countries achieved economic growth while their consumption-based emissions decreased. Most developed countries have achieved decoupling of emissions related to domestic goods and services, but have not achieved decoupling of emissions related to imported goods and services. The U-test confirms that the domestic component of consumption-based emissions exhibits a stronger decoupling trend from gross domestic product (GDP) growth than consumption-based emissions, and emissions from imports continue to rise with GDP per capita without a corresponding decline, providing a statistical validation of the decoupling analysis. Moreover, in the countries where economic growth and consumption-based emissions are most decoupled, a key driver is decreasing emissions intensity due to technological progress─and especially reductions in the intensity of imported goods and services. Our results reveal the importance of assessing decoupling using consumption-based emissions; successful decoupling may require international cooperation and coordinated mitigation efforts of trading partners.
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  • 文章类型: Journal Article
    绿色洗涤比以往任何时候都更具毒性。大量的环境,社会,治理和净零承诺正变得充满可疑和误导性的主张。同时,我们离解决我们这个时代紧迫的环境和社会问题还差得很近。在这次审查中,我们寻求研究这一转变,并将绿洗研究的变化总结为三个关键阶段:(a)1.0静态通信;(b)2.0动态管理;(c)3.0关于未来的叙述。我们分析了当前发展文献的关键领域,并指出了许多有待进一步研究的问题。接下来,我们超越了大部分已发表的工作,以研究新兴的策略,并为未来的研究制定了前瞻性的议程。我们还提出了一个公司沟通失误的模型,在绿洗研究中整合各种溪流。在这样做的时候,我们试图为绿色洗涤研究人员找到一条途径,最终找到难以捉摸的“结束”到绿色洗涤。
    Greenwashing is more virulent than ever. A profusion of environmental, social, and governance and net zero commitments are becoming fraught with questionable and misleading claims. At the same time, we are no closer to solving the pressing environmental and social issues of our time. In this review, we seek to examine this shift and summarize changes in greenwash research into three key phases: (a) 1.0 Static Communication; (b) 2.0 Dynamic Management; and (c) 3.0 Narratives about the Future. We analyze current key areas of developing literature and point to numerous open questions for future research. Next, we go beyond much of the published work to examine emerging tactics and lay out a forward-looking agenda for future research. We also propose a model of Corporate Miscommunication, integrating various streams in greenwash research. In doing so, we seek to lay a pathway for greenwashing researchers to finally find that elusive \"end\" to greenwashing.
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  • 文章类型: Journal Article
    虽然图神经网络(GNN)已经证明了它们在处理非欧几里得结构化数据方面的有效性,GNN的邻域提取是耗时且计算密集的,使得它们难以在低延迟工业应用中部署。为了解决这个问题,一个可行的解决方案是图形知识蒸馏(KD),它可以学习高性能学生多层感知器(MLP),通过模仿教师GNN的卓越输出来代替GNN。然而,最先进的图形知识蒸馏方法主要基于从中间隐藏层中提取深层特征,这导致logit层蒸馏的重要性被大大忽略。为研究基于logits的KD方法提供一个新的观点,我们将解耦的思想引入到图的知识蒸馏中。具体来说,我们首先将经典的图形知识蒸馏损失重新表述为两部分,即,目标类图蒸馏(TCGD)损失和非目标类图蒸馏(NCGD)损失。接下来,我们解耦了GNN的预测置信度和NCGD损失之间的负相关,以及消除TCGD和NCGD之间的固定重量。我们将这种基于logits的方法命名为解耦图知识蒸馏(DGKD)。它可以针对不同的数据样本灵活调整TCGD和NCGD的权重,从而提高学生MLP的预测精度。在公共基准数据集上进行的大量实验表明了我们方法的有效性。此外,DGKD可以作为即插即用损失函数纳入任何现有的图形知识蒸馏框架,进一步提高蒸馏性能。该代码可在https://github.com/xsk160/DGKD获得。
    While Graph Neural Networks (GNNs) have demonstrated their effectiveness in processing non-Euclidean structured data, the neighborhood fetching of GNNs is time-consuming and computationally intensive, making them difficult to deploy in low-latency industrial applications. To address the issue, a feasible solution is graph knowledge distillation (KD), which can learn high-performance student Multi-layer Perceptrons (MLPs) to replace GNNs by mimicking the superior output of teacher GNNs. However, state-of-the-art graph knowledge distillation methods are mainly based on distilling deep features from intermediate hidden layers, this leads to the significance of logit layer distillation being greatly overlooked. To provide a novel viewpoint for studying logits-based KD methods, we introduce the idea of decoupling into graph knowledge distillation. Specifically, we first reformulate the classical graph knowledge distillation loss into two parts, i.e., the target class graph distillation (TCGD) loss and the non-target class graph distillation (NCGD) loss. Next, we decouple the negative correlation between GNN\'s prediction confidence and NCGD loss, as well as eliminate the fixed weight between TCGD and NCGD. We named this logits-based method Decoupled Graph Knowledge Distillation (DGKD). It can flexibly adjust the weights of TCGD and NCGD for different data samples, thereby improving the prediction accuracy of the student MLP. Extensive experiments conducted on public benchmark datasets show the effectiveness of our method. Additionally, DGKD can be incorporated into any existing graph knowledge distillation framework as a plug-and-play loss function, further improving distillation performance. The code is available at https://github.com/xsk160/DGKD.
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  • 文章类型: Journal Article
    为了实现可持续的经济发展,人们越来越重视促进绿色增长和降低碳排放。本研究使用Tapio脱钩模型,并利用对数平均Divisia指数(LMDI)技术分析了影响印度制造业碳排放变化的因素。此外,碳排放强度之间的关系,信息和通信技术(ICT),全要素生产率(TFP),技能,并采用系统-GMM方法对能源强度进行了分析。它基于2001年至2002年至2019年至2020年印度主要21个州/UT的有组织制造业的工厂级年度工业调查(ASI)数据集。调查结果反映了制造业在总体水平和各州都存在弱脱钩。这表明产量和排放量都在增加;然而,产出增长超过排放增长,这意味着努力向更环保的生产方法过渡,并提高能源效率。产出和人口效应是碳排放的主导因素,而能量强度被发现降低了影响。Further,系统-GMM估计表明,ICT和能源强度对全要素生产率有正向影响,随着碳排放强度的增加,生产力下降。研究证实了扇区中存在倒N型库兹涅茨曲线。本研究将有助于制定能源和环境战略,以减少排放并促进采用更清洁的能源。这些努力将有助于实现碳中和,并提高该部门的能源效率。
    There is a growing emphasis on fostering green growth and lowering carbon emissions in order to achieve sustainable economic development. This study uses the Tapio decoupling model and analyzes the factors influencing changes in carbon emissions from manufacturing in India utilizing the log mean Divisia index (LMDI) techniques. Furthermore, the nexus between carbon emission intensity, information and communication technology (ICT), total factor productivity (TFP), skill, and energy intensity has been analyzed using the system-GMM approach. It is based on the plant-level Annual Survey of Industries (ASI) datasets for the organized manufacturing sector of India from 2001 to 2002 to 2019 2020 for the major 21 Indian states/UT. The findings reflect the presence of weak decoupling in the manufacturing sector both at the aggregate level and in states. This indicates that both output and emissions are increasing; however, output growth surpasses emission growth, which signifies an effort to transition towards more environmentally friendly production methods and enhanced energy efficiency. The output and population effect are found to be leading factors in carbon emissions, while energy intensity is found to be reducing the effect. Further, the system-GMM estimates show that ICT and energy intensity positively affect total factor productivity, while with an increase in carbon emission intensity, productivity declines. The study confirms the existence of an inverted N-shaped Kuznets curve in the sector. This present study will contribute to formulating energy and environmental strategies to reduce emissions and promote adopting cleaner energy sources. These efforts will facilitate the attainment of carbon neutrality and enhance energy efficiency within the sector.
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  • 文章类型: Journal Article
    浮游植物代谢过程中海水CO2和溶解氧(DO)之间的化学计量比在评估生态和生物地球化学过程中具有重要意义。我们收集了高分辨率的正在进行的温度,盐度,DO,2017年5月东海内架的pH数据。我们的结果表明,长江口外的pH值(8.36)和过饱和的DO(171%),表明藻类水华事件的发生。它们与0.0029的回归斜率显着相关,大致遵循雷德菲尔德比率。相比之下,长江口以北的低盐度斑块表现出更高的比率(0.0088),具有8.40的pH和大约123%的氧饱和度。O2比CO2快得多的海气平衡速率可能导致这种解耦,提供有关藻华时间演变的见解。理论上,更陡的回归斜率意味着藻类水华的发生更早。构建了端元混合模型,以排除物理混合对溶解的无机碳(ΔDIC)和DO(ΔDO)的影响。此外,我们进行了模拟,以探索ΔDIC-ΔDO回归斜率随时间的时间变化。比较模拟和混合模型得出的斜率表明,解耦水域的生物信号可能比我们的观测值早6-10天。卫星结果在我们观测前一周捕获了低盐度斑块西南的高Chl水域,可能被盛行的西南风向北输送。鉴于在水生环境中经常测量氧气和pH值,它们的组合评估可能是评估时序藻类水华动态的一种有价值的方法。
    The stoichiometric ratio between seawater CO2 and dissolved oxygen (DO) during phytoplankton metabolism holds significant importance in evaluating ecological and biogeochemical processes. We collected high-resolution underway temperature, salinity, DO, and pH data in the East China Sea inner shelf in May 2017. Our results revealed high pH (8.36) and supersaturated DO (171 %) in the outer Changjiang Estuary, indicating the occurrence of an algal bloom event. They were significantly correlated with a regression slope of 0.0029, which roughly followed the Redfield ratio. In contrast, a much higher ratio (0.0088) manifested in a low-salinity patch on north of the Changjiang Estuary, featuring a pH of 8.40 and oxygen saturation of approximately 123 %. The substantially faster air-sea equilibrium rate of O2 than CO2 probably caused such decoupling, offering insight into the temporal evolutions of algal bloom. Theoretically, a steeper regression slope implies an earlier onset of algal bloom. An end-member mixing model was constructed to exclude the physical mixing influences on dissolved inorganic carbon (ΔDIC) and DO (ΔDO). Furthermore, we conducted simulations to explore the temporal variations of ΔDIC-ΔDO regression slope with time. Comparing slopes derived from simulation and mixing model suggested that the biological signal of the decoupled waters likely preceded our observations by 6-10 days. Satellite results captured high-Chl a waters southwest of the low-salinity patch a week before our observation, potentially transported northward by prevailing southwest wind. Given that oxygen and pH are frequently measured in aquatic environments, their combined assessment could be a valuable method for assessing temporal algal bloom dynamics.
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  • 文章类型: Journal Article
    最近的许多研究都使用了煮沸咬口式仪表护齿器来测量运动冲击过程中的头部运动学。仪表化的护口器比以前的护口器具有更高的准确性,因为它们具有直接与头骨耦合的出色能力。这些护齿器已经在实验室和现场得到了验证,但对撞击过程中解耦的影响知之甚少。解耦可以由于各种原因而发生,比如初始拟合差,磨损,或者过大的冲击力。要了解解耦如何影响测量的运动学误差,我们将煮沸和咬伤仪器护齿器安装到安装在国家运动设备标准运营委员会(NOCSAE)人形上的3D打印牙列上。我们还在其重心(CG)处使用线性加速度计和角速度传感器对人头模型进行了测量。我们进行了一系列的摆锤冲击试验,不同的冲击面和冲击方向。我们测量了线性加速度和角速度,我们根据护齿器和头型CG计算了角加速度。我们通过改变下颌和护口器底面之间的间隙来创建解耦条件。我们测试了三种间隙条件:0毫米(对照),1.6mm,和4.8毫米。将口腔防护测量值转换为CG并与参考测量值进行比较。我们发现差距条件,影响持续时间,和冲击方向对护口器测量误差有显著影响。对于较大的间隙和正面(前部和前部凸台)条件,误差较高。在填充条件下也发现了更高的错误,但是由于固有的局限性,护口器并没有收集所有的刚性冲击。我们为每个运动学测量提供了特征解耦时程曲线。还描述了指示特征去耦频率的示例性频谱。研究人员使用煮沸和咬一口仪器护齿应意识到他们的局限性时,解释结果,并应寻求通过先进的后处理技术解决解耦问题。
    Many recent studies have used boil-and-bite style instrumented mouthguards to measure head kinematics during impact in sports. Instrumented mouthguards promise greater accuracy than their predecessors because of their superior ability to couple directly to the skull. These mouthguards have been validated in the lab and on the field, but little is known about the effects of decoupling during impact. Decoupling can occur for various reasons, such as poor initial fit, wear-and-tear, or excessive impact forces. To understand how decoupling influences measured kinematic error, we fit a boil-and-bite instrumented mouthguard to a 3D-printed dentition mounted to a National Operating Committee on Standards for Athletic Equipment (NOCSAE) headform. We also instrumented the headform with linear accelerometers and angular rate sensors at its center of gravity (CG). We performed a series of pendulum impact tests, varying impactor face and impact direction. We measured linear acceleration and angular velocity, and we calculated angular acceleration from the mouthguard and the headform CG. We created decoupling conditions by varying the gap between the lower jaw and the bottom face of the mouthguard. We tested three gap conditions: 0 mm (control), 1.6 mm, and 4.8 mm. Mouthguard measurements were transformed to the CG and compared to the reference measurements. We found that gap condition, impact duration, and impact direction significantly influenced mouthguard measurement error. Error was higher for larger gaps and in frontal (front and front boss) conditions. Higher errors were also found in padded conditions, but the mouthguards did not collect all rigid impacts due to inherent limitations. We present characteristic decoupling time history curves for each kinematic measurement. Exemplary frequency spectra indicating characteristic decoupling frequencies are also described. Researchers using boil-and-bite instrumented mouthguards should be aware of their limitations when interpreting results and should seek to address decoupling through advanced post-processing techniques when possible.
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  • 文章类型: Journal Article
    这项工作的目的是定量表征氧化磷酸化解偶联剂和解耦剂在功能活性线粒体中的有效性,考虑到它们在这些细胞器内膜疏水区域的含量。在进行理论研究时,它是公认的,解耦器和解耦器占据线粒体体积的一部分,以显示它们的活性,其定义为有效体积。考虑了表征这些试剂作用的以下数量:(1)在状态4(C200)中引起线粒体呼吸双重刺激的试剂浓度;(2)有效分配系数(EMW)-线粒体有效体积中试剂的量与水体积之比;(3)与线粒体有效体积相关的试剂的相对量(UM/UT);(4)定位于线粒体有效体积中的试剂的比活性(A)。我们已经开发了确定这些值的方法,基于对线粒体呼吸速率对孵育培养基中两种不同浓度的线粒体蛋白的解偶联剂和解耦剂浓度的依赖性的分析。在实验研究中,我们比较了经典的质子基团解偶联剂2,4-二硝基苯酚(DNP)和偶氮羰基氰化物4-(三氟甲氧基)苯基腙(FCCP)的作用,天然解偶联剂月桂酸和棕榈酸,和自然解耦器α,ω-十四碳二(TDA)和α,ω-十六碳二酸(HDA)在分子结构和在脂质中的溶解度方面都不同。使用开发的方法,我们已经阐明了这些解偶联剂和解耦剂的活性程度对其分子在线粒体有效体积和水体积之间的分布的依赖性。
    The purpose of this work was to quantitatively characterize the effectiveness of oxidative phosphorylation uncouplers and decoupling agents in functionally active mitochondria, taking into account their content in the hydrophobic region of the inner membrane of these organelles. When conducting theoretical studies, it is accepted that uncouplers and decouplers occupy part of the volume of mitochondria to exhibit their activity, which is defined as the effective volume. The following quantities characterizing the action of these reagents are considered: (1) concentrations of reagents that cause double stimulation of mitochondrial respiration in state 4 ( C 200 ); (2) effective distribution coefficient ( E MW ) - the ratio of the amount of reagents in the effective volume of mitochondria and the water volume; (3) the relative amount of reagents associated with the effective volume of mitochondria ( U M / U T ); (4) specific activity of reagents localized in the effective volume of mitochondria ( A M ). We have developed methods for determining these values, based on an analysis of the dependence of the rate of mitochondrial respiration on the concentration of uncouplers and decoupling agents at two different concentrations of mitochondrial protein in the incubation medium. During experimental studies, we compared the effects of the classical protonophore uncouplers 2,4-dinitrophenol (DNP) and сarbonyl cyanide 4-(trifluoromethoxy)phenylhydrazone (FCCP), the natural uncouplers lauric and palmitic acids, and the natural decouplers α,ω-tetradecanedioic (TDA) and α,ω-hexadecanedioic (HDA) acids that differ both in the structure of the molecule and in the degree of solubility in lipids. Using the developed methods, we have clarified the dependence of the degree of activity of these uncouplers and decoupling agents on the distribution of their molecules between the effective volume of mitochondria and the water volume.
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  • 文章类型: Journal Article
    针对多维混合加载情况下的六分量力传感器负载解耦问题,提出了一种基于多项式回归人工神经网络的两级解耦模型。第一阶段构建的六维负荷分类阶段模型将63个负荷类别标记集与深度BP神经网络相结合。在第二阶段,通过将多项式回归与BP神经网络相结合,构建了六维负荷回归阶段模型。同时,设计了以光纤布拉格光栅(FBG)传感器为敏感元件的六分量力传感器,建立了弹性体仿真和标定实验数据集,实现了两阶段解耦模型的验证。基于仿真数据的结果表明,分类阶段的准确率为93.65%。回归阶段力通道的MAPE为6.29%,和3.24%的时刻通道。基于实验数据的结果表明,分类阶段的准确率为87.80%。回归阶段力通道的MAPE为5.63%,时刻通道为4.82%。
    A two-stage decoupling model based on an artificial neural network with polynomial regression is proposed for the six-component force sensor load decoupling problem in the case of multidimensional mixed loading. The six-dimensional load categorization stage model constructed in the first stage combines 63 load category label sets with a deep BP neural network. The six-dimensional load regression stage model was constructed by combining polynomial regression with a BP neural network in the second stage. Meanwhile, the six-component force sensor with a fiber Bragg grating (FBG) sensor as the sensitive element was designed, and the elastomer simulation and calibration experimental dataset was established to realize the validation of the two-stage decoupling model. The results based on the simulation data show that the accuracy of the classification stage is 93.65%. The MAPE for the force channel in the regression stage is 6.29%, and 3.24% for the moment channel. The results based on experimental data show that the accuracy of the classification stage is 87.80%. The MAPE for the force channel in the regression phase is 5.63%, and 4.82% for the moment channel.
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