3,577 results match your criteria: "University of Defense[Affiliation]"
ACS Nano
December 2024
Department of Materials Science and Engineering, National University of Singapore, Singapore117575, Singapore.
A Rashba spin-splitting state with spin-momentum locking enables the charge-spin interconversion known as the Rashba effect, induced by the interplay of inversion symmetry breaking (ISB) and spin-orbit coupling (SOC). Enhancing spin-splitting strength is promising to achieve high spin-orbit torque (SOT) efficiency for low-power-consumption spintronic devices. However, the energy scale of natural ISB at the interface is relatively small, leading to the weak Rashba effect.
View Article and Find Full Text PDFFront Immunol
December 2024
Department of Oncology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China.
Introduction: Immunotherapy, especially immune checkpoint blockade (ICB), holds promise as a therapeutic strategy in colorectal cancer (CRC) by harnessing the patient's immune system to target malignant cells. Particularly, the PD-1/PD-L1 axis is widely recognized for its critical role in tumor microenvironment immunosuppression. Antibodies targeting PD-1 or PD-L1 have shown sustained efficacy against various cancers, including CRC.
View Article and Find Full Text PDFSensors (Basel)
December 2024
School of Geosciences and Info-Physics, Central South University, Changsha 410083, China.
Traditional multimodal contrastive learning brings text and its corresponding image closer together as a positive pair, where the text typically consists of fixed sentence structures or specific descriptive statements, and the image features are generally global features (with some fine-grained work using local features). Similar to unimodal self-supervised contrastive learning, this approach can be seen as enforcing a strict identity constraint in a multimodal context. However, due to the inherent complexity of remote sensing images, which cannot be easily described in a single sentence, and the fact that remote sensing images contain rich ancillary information beyond just object features, this strict identity constraint may be insufficient.
View Article and Find Full Text PDFSensors (Basel)
November 2024
College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China.
With the growing number of electronic devices loaded and increasing influence from electromagnetic interference, large-scale systems or platforms are confronted with increasingly severe electromagnetic compatibility challenges. Due to the vast size of these systems and the multitude of electronic devices they contain, standard laboratory environments are often inadequate for meeting test requirements. This paper reviews the state-of-art in the area of field measurement techniques related to the checking of electromagnetic compatibility, and the key technologies of electromagnetic interference filtering and wide-bandwidth, large-dynamic, and rapidly transient signal extraction in the measurement field are analyzed.
View Article and Find Full Text PDFNanomaterials (Basel)
December 2024
State Key Laboratory of Pulsed Power Laser Technology, College of Electronic Engineering, National University of Defense Technology, Hefei 230037, China.
Metalens can achieve arbitrary light modulation by controlling the amplitude, phase, and polarization of the incident waves and have been applied across various fields. This paper presents a color router designed based on metalens, capable of effectively separating spectra from visible light to near-infrared light. Traditional design methods for meta-lenses require extensive simulations, making them time-consuming.
View Article and Find Full Text PDFNanomaterials (Basel)
November 2024
School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China.
A green chemical shear-thickening polishing (GC-STP) method was studied to improve the surface precision and processing efficiency of monocrystalline silicon. A novel green shear-thickening polishing slurry composed of silica nanoparticles, alumina abrasive, sorbitol, plant ash, polyethylene glycol, and deionized water was formulated. The monocrystalline silicon was roughly ground using a diamond polishing slurry and then the GC-STP process.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Department of Vascular Surgery, The Second Xiangya Hospital, Central South University, Changsha, China; The Institute of Vascular Diseases, Central South University, Changsha, China. Electronic address:
The high incidence of skin wounds (e.g., burns, diabetic ulcers, venous ulcers, pressure sores, and radiation injuries) remains a significant challenge in clinical settings.
View Article and Find Full Text PDFNeural Netw
December 2024
College of Computer Science and Technology, National University of Defense Technology, Changsha, 410000, Hunan, China.
The increasing utilization of deep neural networks (DNNs) in safety-critical systems has raised concerns about their potential to exhibit undesirable behaviors. Consequently, DNN repair/patching arises in response to the times, and it aims to eliminate unexpected predictions generated by flawed DNNs. However, existing repair methods, both retraining- and fine-tuning-based, primarily focus on high-level abstract interpretations or inferences of state spaces, often neglecting the outputs of underlying neurons.
View Article and Find Full Text PDFPeerJ Comput Sci
November 2024
School of Computer Science and Engineering, Central South University, Changsha, Hunan, China.
Named entity recognition (NER) is a crucial task in natural language processing, particularly challenging in the legal domain due to the intricate and lengthy nature of legal entities. Existing methods often struggle with accurately identifying entity boundaries and types in legal texts. To address these challenges, we propose a novel sequence-to-sequence framework designed specifically for the legal domain.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
December 2024
Beijing National Laboratory for Molecular Sciences, Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Adv Sci (Weinh)
December 2024
College of Meteorology and Oceanography, National University of Defense Technology, Changsha, Hunan, 410073, China.
Traditionally, Rayleigh scattering is thought to only impact fiber sensing system performance when the leading fiber is over 10 km long. However, this report illustrates theoretically and experimentally that Rayleigh scattering cannot be ignored in fiber optic interferometric sensor (FOIS) even with several hundred-meter common leading fiber because of the interaction of Rayleigh backward scattering (RBS) and returning interference signal. Herein, a conceptual framework is developed to elucidate the interaction between RBS and FOIS interference, revealing that, beyond laser monochromacity, the self-correction characteristic of laser pulses also influences coherent superposition.
View Article and Find Full Text PDFRev Sci Instrum
December 2024
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
ACS Appl Mater Interfaces
December 2024
School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China.
Brain Res Bull
November 2024
College of Intelligence Science and Technology, National University of Defense Technology, Changsha, China. Electronic address:
The positive hemodynamic response (PHR) during stimulation often co-occurs with a strong, sustained negative hemodynamic response (NHR). However, the characteristics and neurophysiological mechanisms of the NHR, especially in regions distal to the PHR, remain incompletely understood. Using intrinsic optical imaging (OI) and two-photon imaging, we observed that forelimb electrical stimulation evoked strong PHR signals in the forelimb region of the primary somatosensory cortex (S1FL).
View Article and Find Full Text PDFPNAS Nexus
November 2024
College of Systems Engineering, National University of Defense Technology, Changsha 410073, China.
The analysis of connection strengths and distances in the mobility network is pivotal for delineating critical pathways, particularly in the context of epidemic propagation. Local connections that link proximate districts typically exhibit strong weights. However, ties that bridge distant regions with high levels of interaction intensity, termed strong long (SL) ties, warrant increased scrutiny due to their potential to foster satellite epidemic clusters and extend the duration of pandemics.
View Article and Find Full Text PDFSensors (Basel)
November 2024
College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
The detection of bolt loosening in key components of aircraft engines faces problems such as complex and difficult-to-establish bolt loosening mechanism models, difficulty in identifying early loosening, and difficulty in extracting signal features with nonlinear and non-stationary characteristics. Therefore, the automated structural bolt micro looseness monitoring method using deep learning was proposed. Specifically, the addition of batch normalization methods enables the established Batch Normalized Stacked Autoencoders (BNSAEs) model to converge quickly and effectively, making the model easy to build and effective.
View Article and Find Full Text PDFMicromachines (Basel)
October 2024
College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
A photonic lantern is a low-loss device that connects a single multimode waveguide to multiple single-mode waveguides and can enhance the beam quality of a fiber laser by adaptively controlling the optical parameters (amplitude, phase, polarization) at the input. In this work, we combined the gains and losses of individual modes within the fiber amplifier and introduced a mode content parameter at the amplifier's output as an evaluation function to simulate mode control effects. Mode competition within the gain fiber can degrade the control effect of the fundamental mode and lead to it taking a longer time for the control to converge.
View Article and Find Full Text PDFGenes (Basel)
November 2024
College of Pharmacy, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, China.
Genes (Basel)
November 2024
College of Computer, National University of Defense Technology, Changsha 410073, China.
Background: Lour., a genus in the subfamily Cercidoideae of the family Leguminosae, is characterized by woody liana habit, tendrils, and distinctive bilobate or bifoliolate leaves. The genus holds important medicinal value and constitutes a complex group characterized by morphological diversity and unstable taxonomic boundaries.
View Article and Find Full Text PDFEntropy (Basel)
November 2024
Department of Intelligent Data Science, College of Computer Science and Technology, National University of Defense Technology, Changsha 410073, China.
Quantum generative models have shown promise in fields such as quantum chemistry, materials science, and optimization. However, their practical utility is hindered by a significant challenge: the lack of interpretability. In this work, we introduce to enhance both the interpretability and controllability of quantum generative models.
View Article and Find Full Text PDFEntropy (Basel)
October 2024
Department of Intelligent Data Science, College of Computer Science and Technology, National University of Defense Technology, Changsha 410073, China.
We introduce the concept-driven quantum neural network (CD-QNN), an innovative architecture designed to enhance the interpretability of quantum neural networks (QNNs). CD-QNN merges the representational capabilities of QNNs with the transparency of self-explanatory models by mapping input data into a human-understandable concept space and making decisions based on these concepts. The algorithmic design of CD-QNN is comprehensively analyzed, detailing the roles of the concept generator, feature extractor, and feature integrator in improving and balancing model expressivity and interpretability.
View Article and Find Full Text PDFEntropy (Basel)
October 2024
College of Electronic Engineering, National University of Defense Technology, Hefei 230037, China.
Encryption techniques used by forgers have thrown out a big possible challenge to forensics. Most traditional forensic tools will fail to detect the forged multimedia, which has been encrypted. Thus, image forensics in the encrypted domain (IFED) is significant.
View Article and Find Full Text PDFBioengineering (Basel)
November 2024
College of Computer Science and Technology, National University of Defense Technology, Changsha 410073, China.
The transition in medical image segmentation from fine-grained to coarse-grained annotation methods, notably scribble annotation, offers a practical and efficient preparation for deep learning applications. However, these methods often compromise segmentation precision and result in irregular contours. This study targets the enhancement of scribble-supervised segmentation to match the accuracy of fine-grained annotation.
View Article and Find Full Text PDFNeural Netw
February 2025
School of Computer Science and Technology, Soochow University, Suzhou, 215006, China. Electronic address:
In hierarchical reinforcement learning, unsupervised skill discovery holds promise for overcoming the challenge of sparse rewards commonly encountered in traditional reinforcement learning. Although previous unsupervised skill discovery methods excelled at maximizing intrinsic rewards, they often overly prioritized skill diversity. Unrestrained pursuit of diversity leads skills to concentrate attention on unexplored domains, overlooking the internal consistency of skills themselves, resulting in the state visit distribution of individual skills lacking concentration.
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