Multiscale structures require excellent multiphysical properties to withstand the loads in various complex engineering *** this study,a concurrent isogeometric topology optimization method is proposed to design multis...
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Multiscale structures require excellent multiphysical properties to withstand the loads in various complex engineering *** this study,a concurrent isogeometric topology optimization method is proposed to design multiscale structures with high thermal conductivity and low mechanical ***,the mathematical description model of multi-objective topology optimization for multiscale structures is constructed,and a single-objective concurrent isogeometric topology optimization formulation for mechanical and thermal compliance is ***,by combining the isogeometric analysis method,the material interpolation model and decoupled sensitivity analysis scheme of the objective function are established on macro and micro *** solid isotropic material with penalization method is employed to update iteratively the macro and microstructure topologies ***,the feasibility and advantages of the proposed approach are illustrated by several 2D and 3D numerical examples with different volume fractions,while the effects of volume fraction and different boundary conditions on the final configuration and multi-objective performance of the multiscale structure are *** show that the isogeometric concurrent design of multiscale structures through multi-objective optimization can produce better multi-objective performance compared with a single-scale one.
In modern science and engineering disciplines,data-driven discovery methods play a fundamental role in system modeling,as data serve as the external representations of the intrinsic mechanisms within ***,empirical dat...
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In modern science and engineering disciplines,data-driven discovery methods play a fundamental role in system modeling,as data serve as the external representations of the intrinsic mechanisms within ***,empirical data contaminated by process and measurement noise remain a significant obstacle for this type of *** this study,we have developed a data-driven method capable of directly uncovering linear dynamical systems from noisy *** method combines the Kalman smoothing and sparse Bayesian learning to decouple process and measurement noise under the expectation-maximization framework,presenting an analytical method for alternate state estimation and system ***,the discovered model explicitly characterizes the probability distribution of process and measurement noise,as they are essential for filtering,smoothing,and stochastic *** have successfully applied the proposed algorithm to several simulation *** results demonstrate its potential to enable linear dynamical system discovery in practical applications where noise-free data are intractable to capture.
The quality of instructions is crucial for LLM (large language model) fine-tuning. The most compelling data for instruction tuning exhibit not only high complexity, low perplexity, high faithfulness, and high answer r...
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To enhance the electrochemical performance of the reversible solid oxide cell(RSOC),a facile way through adopting A-site deficient Pr_(0.94)PrBaCo_(1.5)Fe_(0.5)O_(5+δ)(PBCF94)as an air electrode for RSOC is *** desig...
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To enhance the electrochemical performance of the reversible solid oxide cell(RSOC),a facile way through adopting A-site deficient Pr_(0.94)PrBaCo_(1.5)Fe_(0.5)O_(5+δ)(PBCF94)as an air electrode for RSOC is *** designed A-site Pr-deficient air electrode is expected to provide abundant oxygen vacancies,macroscopic nanoparticle generation,excellent redox properties and oxygen mobility,which ultimately contribute to the enhanced electrocatalytic *** results confirm that the RSOC with an A-site deficient air electrode exhibits considerable peak power density up to 1.53 W·cm^(-2),and the desirable electrolysis current density reaches 2.29 A·cm^(-2)at 1.5 V and 800℃.Correspondingly,the RSOC exhibits remarkable long-term reversible stability of 200 ***,the A-site deficient Pr_(0.94)PrBaCo_(1.5)Fe_(0.5)O_(5+δ)air electrode could be the potential one for RSOC application.
The visual noise of each light intensity area is different when the image is drawn by Monte Carlo ***,the existing denoising algorithms have limited denoising performance under complex lighting conditions and are easy...
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The visual noise of each light intensity area is different when the image is drawn by Monte Carlo ***,the existing denoising algorithms have limited denoising performance under complex lighting conditions and are easy to lose detailed *** we propose a rendered image denoising method with filtering guided by lighting ***,we design an image segmentation algorithm based on lighting information to segment the image into different illumination ***,we establish the parameter prediction model guided by lighting information for filtering(PGLF)to predict the filtering parameters of different illumination *** different illumination areas,we use these filtering parameters to construct area filters,and the filters are guided by the lighting information to perform sub-area ***,the filtering results are fused with auxiliary features to output denoised images for improving the overall denoising effect of the *** the physically based rendering tool(PBRT)scene and Tungsten dataset,the experimental results show that compared with other guided filtering denoising methods,our method improves the peak signal-to-noise ratio(PSNR)metrics by 4.2164 dB on average and the structural similarity index(SSIM)metrics by 7.8%on *** shows that our method can better reduce the noise in complex lighting scenesand improvethe imagequality.
Interpretable visual recognition is essential for decision-making in high-stakes situations. Recent advancements have automated the construction of interpretable models by leveraging Visual Language Models (VLMs) and ...
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Arrhythmia is a serious cardiovascular disease that can greatly affect a patient’s health and even pose a risk to their life. Automatic classification of arrhythmia through 12-lead electrocardiogram (ECG) is of great...
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Optical nonreciprocity,which refers to the direction-dependent emission,scattering and absorption of photons,plays a very important role in quantum engineering and quantum information ***,we propose an all-optical app...
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Optical nonreciprocity,which refers to the direction-dependent emission,scattering and absorption of photons,plays a very important role in quantum engineering and quantum information ***,we propose an all-optical approach to achieve the optical dynamical switchable quantum nonreciprocity by an off-resonant chiral two-photon driving in a single microring cavity,which differs from the conventional nonreciprocal *** is shown that the optical field with time-dependent statistical properties can be generated and the nonreciprocity flips periodically,with switchable photon blockade and photon-induced tunneling *** find that the dynamical system is robust and immune to the parameter variations,which loosens the parameter range of ***,the time window for one-way quantum information is sufficiently wide and *** work opens a new idea for the current quantum nonreciprocal research,which can facilitate a memory functionality and be used for future inmemory superconducting quantum *** other nonreciprocal quantum devices,i.e.,dynamical switchable nonreciprocal squeezing and entanglement,may be inspired by our method,which is expected to have important applications in future quantum technology.
In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been ...
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In spinless systems,growing attention has recently been attracted to synthetic gauge fields,which redefine the fundamental crystal symmetries by utilizing the projective algebraic ***,synthetic gauge fields have been commonly investigated in single orbital systems,and explorations on hybrid orbitals remain elusive in ***,we report the experimental observation of hybrid topological phases induced by hybrid synthetic gauge flux,which is formed by the interaction between p and d orbitals embedded in acoustic *** breaking the translation symmetries of L_(x) and/or L_(y),we unambiguously demonstrate the first-order Möbius edge states and higher-order corner *** work establishes a platform for seeking exotic topological phases induced by hybrid-orbitals interactions and initializing the framework of hybrid-orbitalsrelated topological *** applications can be anticipated in scenarios such as high-quality sensing and robust wave trapping due to the stepwise energy distribution of the hybrid topological phase.
Container-based virtualization isbecoming increasingly popular in cloud computing due to its efficiency and *** isolation is a fundamental property of *** works have indicated weak resource isolation could cause signi...
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Container-based virtualization isbecoming increasingly popular in cloud computing due to its efficiency and *** isolation is a fundamental property of *** works have indicated weak resource isolation could cause significant performance degradation for containerized applications and enhanced resource ***,current studies have almost not discussed the isolation problems of page cache which is a key resource for *** leverage memory cgroup to control page cache ***,existing policy introduces two major problems in a container-based ***,containers can utilize more memory than limited by their cgroup,effectively breaking memory ***,the Os kernel has to evict page cache to make space for newly-arrived memory requests,slowing down containerized *** paper performs an empirical study of these problems and demonstrates the performance impacts on containerized *** we propose pCache(precise control of page cache)to address the problems by dividing page cache into private and shared and controlling both kinds of page cache separately and *** do so,pCache leverages two new technologies:fair account(f-account)and evict on demand(EoD).F-account splits the shared page cache charging based on per-container share to prevent containers from using memory for free,enhancing memory *** EoD reduces unnecessary page cache evictions to avoid the performance *** evaluation results demonstrate that our system can effectively enhance memory isolation for containers and achieve substantial performance improvement over the original page cache management policy.
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