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Efficient chlorination reaction of Pt/RuO_(2)/g-C_(3)N_(4)under visible light irradiation for simultaneous removal of ammonia and bacteria from mariculture wastewater

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Journal of Environmental sciences 2025年第4期150卷 490-502页

作者： Yizhan Zhang Min Zhao Yida Huang Yan-Ling Hu Lei Wang School of Environmental Science&Engineering Xiamen University of TechnologyXiamen 361024China Fujian Provincial Key Laboratory of Functional Materials and Applications School of Materials Science&EngineeringXiamen University of TechnologyXiamen 361024China

The removal of ammonia nitrogen(NH_(4)^(+)-N)and bacteria from aquaculture wastewater holds paramount ecological and production *** this study,Pt/RuO_(2)/g-C_(3)N_(4)photocatalysts were prepared by depositing Pt and RuO_(2)particles onto g-C_(3)N_(4).The physicochemical properties of photocatalysts were explored by X-ray photoelectron spectroscopy(XPS),scanning electron microscopy(SEM),X-ray diffraction(XRD),and UV–vis diffuse reflectance spectrometer(UV–vis DRS).The photocatalysts were then applied to the removal of both NH_(4)^(+)-N and bacteria from simulated mariculture *** results clarified that the removals of both NH_(4)^(+)-N and bacteria were in the sequence of g-C_(3)N_(4)

关键词： Photocatalysis Mariculture wastewater Ammonia nitrogen Visible light irradiation Microbial inactivation

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Effect of Co substitution for Fe on microstructure and magnetic properties of FeNiSiBCuNb alloy ribbons

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Chinese Physics B 2025年第2期34卷 438-446页

作者： Wen-Feng Liu Ya-Ting Yuan Chang-Jiang Yu Shu-Jie Kang Qian-Ke Zhu Zhe Chen Ke-Wei Zhang Min-Gang Zhang School of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Laboratory of Magnetic and Electric Functional Materials and Applications The Key Laboratory of Shanxi ProvinceTaiyuan 030024China

This work investigated the microstructure,magnetic properties,and crystallization kinetics of the as-spun and annealed alloy ribbons of(Fe_(40-x)Co_xNi_(40)Si_(6.33)B_(12.66)Cu_1)_(0.97)Nb_(0.03),where x=0,6,7,8,9,prepared using the meltspinning *** results show that adding a moderate amount of Co can improve the glass forming ability(GFA),the first peak crystallization temperature,and thermal stability of the as-spun alloy *** x=7,the two-stage crystallization temperature interval△Tx=90 exhibits optimal thermal stability,and the alloy annealed at 673 K for 10 minutes shows the favorable combined magnetic properties,with H_(c)=0.12 A/m,M_(s)=88.7 A·m^(2)/kg,andμ_(e)=*** magnetic domain results show that annealing removes numerous pinning points in the magnetic domains of the alloy ribbons,making the domain walls smoother and effectively reducing the pinning effect.

关键词： amorphous alloys Co substitution for Fe glass formation ability magnetic properties crystallization kinetics

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A parallel solver framework for fully implicit monolithic fluid-structure interaction

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Acta Mechanica Sinica 2025年第2期41卷 88-115页

作者： Yujie Sun Qingshuang Lu Ju Liu Department of Mechanics and Aerospace Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong-Hong Kong-Macao Joint Laboratory for Data-Driven Fluid Mechanics and Engineering Applications Southern University of Science and TechnologyShenzhen 518055China

We propose a suite of strategies for the parallel solution of fully implicit monolithic fluid-structure interaction(FSI).The solver is based on a modeling approach that uses the velocity and pressure as the primitive variables,which offers a bridge between computational fluid dynamics(CFD)and computational structural *** spatiotemporal discretization leverages the variational multiscale formulation and the generalized-αmethod as a means of providing a robust discrete *** particular,the time integration scheme does not suffer from the overshoot phenomenon and optimally dissipates high-frequency spurious modes in both subproblems of *** on the chosen fully implicit scheme,we systematically develop a combined suite of nonlinear and linear solver *** a block factorization of the Jacobian matrix,the Newton-Raphson procedure is reduced to solving two smaller linear systems in the multi-corrector *** first is of the elliptic type,indicating that the algebraic multigrid method serves as a well-suited *** second exhibits a two-by-two block structure that is analogous to the system arising in *** by prior studies,the additive Schwarz domain decomposition method and the block-factorization-based preconditioners are invoked to address the linear *** the number of unknowns matches in both subdomains,it is straightforward to balance loads when parallelizing the algorithm for distributed-memory *** use two representative FSI benchmarks to demonstrate the robustness,efficiency,and scalability of the overall FSI solver *** particular,it is found that the developed FSI solver is comparable to the CFD solver in several aspects,including fixed-size and isogranular scalability as well as robustness.

关键词： Fluid-structure interaction Monolithic coupling Implicit time integration Iterative methods Vortex-induced vibration

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Explaining the better generalization of label distribution learning for classification

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science China(Information sciences) 2025年第5期68卷 348-361页

作者： Jing WANG Xin GENG School of Computer Science and Engineering Southeast University Key Laboratory of New Generation Artificial Intelligence Technology and Its Interdisciplinary Applications(Southeast University) Ministry of Education

Label distribution learning(LDL) has shown advantages over traditional single-label learning(SLL) in many realworld applications, but its superiority has not been theoretically understood. In this paper, we attempt to explain why LDL generalizes better than SLL. Label distribution has rich supervision information such that an LDL method can still choose the sub-optimal label from label distribution even if it neglects the optimal one. In comparison, an SLL method has no information to choose from when it fails to predict the optimal label. The better generalization of LDL can be credited to the rich information of label distribution. We further establish the label distribution margin theory to prove this explanation; inspired by the theory,we put forward a novel LDL approach called LDL-LDML. In the experiments, the LDL baselines outperform the SLL ones, and LDL-LDML achieves competitive performance against existing LDL methods, which support our explanation and theories in this paper.

关键词： label distribution learning classification generalization label distribution margin label ambiguity neural network

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Seizure Prediction on EEG Signals using Feature Augmentation based Multi Model Ensemble

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Recent Patents on engineering 2025年第1期19卷 41-49页

作者： Anandaraj, A. Alphonse, P.J.A. Department of Computer Science and Engineering Sri Eshwar College of Engineering Coimbatore India Department of Computer Applications National Institute of Technology Tamilnadu Tiruchirappalli India

Background: Epilepsy is a neurological disorder that leads to seizures. This occurs due to excessive electrical discharge by the brain cells. An effective seizure prediction model can aid in improving the lifestyle of epilepsy patients. After analyzing various patents related to seizure prediction, it is observed that monitoring electroencephalography (EEG) signals of epileptic patients is an important task for the early diagnosis of seizures. Objective: The main objective of this paper is to assist epileptic patients to enhance their way of living by predicting the seizure in advance. Methods: This paper builds a feature augmentation-based multi-model ensemble-based architecture for seizure prediction. The proposed technique is divided into 2 broad categories;feature augmentation and ensemble modeling. The feature augmentation process builds temporal features while the multi-model ensemble has been designed to handle the high complexity levels of the EEG data. The first phase of the multi-model ensemble has been designed with heterogeneous classifier models. The second phase is based on the prediction results obtained from the first phase. Experiments were performed using the seizure prediction dataset from the University Hospital of Bonn. Results: Comparison indicates 98.7% accuracy, with improvement of 5% from the existing model. High prediction levels indicate that the model is highly capable of providing accurate seizure predictions, hence ensuring its applicability in real time. Conclusion: The result of this paper has been compared with existing methods of predicting seizures and it indicated that the proposed model has better enhancement in the accuracy levels. © 2025 Bentham science Publishers.

关键词： Electroencephalography

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Enhancement of luminescence properties and thermal stability of near-UV-excitable KSr1-x-yCayPO4:xEu3+ red phosphors by substituting Sr with Ca for white LEDs

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Ceramics International 2025年第10期51卷 12853-12864页

作者： Dao, Jianwei Han, Zihao Jiang, Zhihao Wei, Tiqun Xue, Junlin Wang, Bin Yi, Sicheng Yang, Liang Key Laboratory of Functional Materials and Applications of Fujian Province School of Materials Science and Engineering Xiamen University of Technology Xiamen361024 China

Narrow-band red phosphors excited by near-ultraviolet light (n-UV) are significant for enhancing the R9 index and can produce high color rendering white LEDs. A range of KSr1-x-yCayPO4:xEu3+ red phosphors were synthesized by high-temperature solid-state reaction method. We investigated the effects of partially substituting Sr2+ ions with Ca2+ ions on the phosphors' crystal structure, photoluminescence and thermal stability. Significantly, incorporating Ca2+ ions enhances the luminescent properties and thermal stability. Under n-UV light excitation, all samples exhibit red emission around 614 nm, corresponding to the 5D0→7F2 transition of Eu3+ ions. At the doping concentration of Eu3+ ions (x = 0.08), an optimal KSr0.52Ca0.4PO4:0.08Eu3+ (y = 0.4) sample was obtained. The excitation wavelength exhibited a slight violet shift from 398 nm to 396 nm. At 150 °C, the luminescence intensity of KSr0.92PO4:0.08Eu3+ remains 80.1 % of its value at room temperature, while that of KSr0.52Ca0.4PO4:0.08Eu3+ reaches 89.7 %. White LED device can be fabricated by combining the as-prepared KSr0.52Ca0.4PO4:0.08Eu3+ red phosphor with commercial BaMgAl10O17:Eu2+ blue and (Ba, Sr)2SiO4:Eu2+ green phosphors, along with encapsulation using n-UV LED chip (395–400 nm). The device emits bright white light and exhibits a high color rendering index (Ra = 87.6, R9 = 89.8) and suitable correlated color temperature (CCT = 5523 K) at 300 mA drive current. The results demonstrate that this work provides new application prospects for the fabrication of high color rendering white LEDs using n-UV light. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Photoluminescence

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New deltahedral architectures of rhodium-mediated Pn_(7)^(3−)(Pn=Sb and Bi)cages

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Nano Research 2025年第3期18卷 666-673页

作者： Lei Qiao Chuan-Ling Chen Zhong-Ming Sun State Key Laboratory of Element-Organic Chemistry Tianjin Key Lab for Institution Rare Earth Materials and ApplicationsSchool of Materials Science and EngineeringNankai UniversityTianjin 300350China

The reactions of K_(5)Pn_(4)(Pn=Sb and Bi)and CpRh(PPh_(3))_(2)(Cp=C_(5)H_(5),cyclopentadiene)in ethylenediamine(en)solutions resulted in a series of new Pn_(7)^(3−)−adducts,{Pn_(8)[Rh(PPh_(3))]_(2)}^(2−),{Sb_(7)[Rh(PPh_(3))]_(2)}^(2)−,and{Sb_(7)[Rh(PPh_(3))]_(3)}^(2−),through slight variations in reaction *** clusters represent rare electron-deficient group 15 polyhedral clusters comprising Pn_(7)^(3−)−with RhPPh3 units in anη^(5)coordination ***,the anionic clusters{Sb_(8)[Rh(PPh_(3))]_(2)}^(2−),{Sb_(7)[Rh(PPh_(3))]_(2)}^(2−),and{Sb_(7)[Rh(PPh_(3))]_(3)}^(2−)are the first Rh-Sb binary Zintl clusters to *** synthesis,structure,and bonding of these new deltahedral hybrids were studied for the first time,revealing a highly versatile chemistry associated with classical Pn_(7)^(3−)−cages and offering a pathway to prepare polyhedral hybrid clusters based on Pn_(7)^(3−)−cages.

关键词： group 15 clusters heterometallic clusters nanoclusters-based materials electronic structures coordination modes

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Robust Image Forgery Localization Using Hybrid CNN-Transformer Synergy Based Framework

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Computers, Materials & Continua 2025年第3期82卷 4691-4708页

作者： Sachin Sharma Brajesh Kumar Singh Hitendra Garg Department of Computer Science Abdul Kalam Technical UniversityLucknow226031India Department of Computer Engineering & Applications GLA UniversityMathura281406India Department of Computer Science Raja Balwant Singh Engineering Technical CampusAgra283105India

Image tampering detection and localization have emerged as a critical domain in combating the pervasive issue of image manipulation due to the advancement of the large-scale availability of sophisticated image editing *** manual forgery localization is often reliant on forensic *** recent times,machine learning(ML)and deep learning(DL)have shown promising results in automating image forgery ***,the ML-based method relies on hand-crafted ***,the DL method automatically extracts shallow spatial features to enhance the ***,DL-based methods lack the global co-relation of the features due to this performance degradation noticed in several *** the proposed study,we designed FLTNet(forgery localization transformer network)with a CNN(convolution neural network)encoder and transformer-based *** encoder extracts local high-dimensional features,and the transformer provides the global co-relation of the *** the decoder,we have exclusively utilized a CNN to upsample the features that generate tampered mask ***,we evaluated visual and quantitative performance on three standard datasets and comparison with six state-of-the-art *** IoU values of the proposed method on CASIA V1,CASIA V2,and CoMoFoD datasets are 0.77,0.82,and 0.84,*** addition,the F1-scores of these three datasets are 0.80,0.84,and 0.86,***,the visual results of the proposed method are clean and contain rich information,which can be used for real-time forgery *** code used in the study can be accessed through URL:https://***/ajit2k5/Forgery-Localization(accessed on 21 January 2025).

关键词： Image tampering convolution neural network(CNN) hybrid transformer localization

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Classifying the state of knowledge-based question answering: patterns, progress, and prospects

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International Journal of Computers and applications 2025年第1期47卷 93-105页

作者： Sharma, Sumit Jain, Sarika Tiwari, Mukesh Kumar lal, Sohan Department of Computer Science and Engineering Quantum University Roorkee Uttarakhand Roorkee India Department of Computer Applications National Institute of Technology Haryana Kurukshetra India

In response to inquiries posed in natural languages, question-answering systems (QASs) produce responses. The capabilities of early QASs are limited because they were designed for certain domains. The current generation of QASs focuses on the types of inquiries that users typically enquire, the features of the data sources that are used, and the formats in which the right responses are produced. Many QASs have been developed since the 1960s when research on the subject first started. There are several cutting-edge frameworks for answering questions that can be used to categorize the QA system according to a number of criteria. The necessity for an extensive survey on QASs comes naturally in order to determine the future focus of research in this field. In this study, QASs are analyzed by the number of criteria used to categorize question-answering (QA) and provide the dimension using a variety of standards to cover all the QAS. We describe the current state of research in each QAS area and make recommendations for its future direction. Based on the dimension criteria outlined in the research methodology, research studies are chosen for additional review and comparison. Constructed some criteria to classify the QASs, we provide the classification and go over the benefits and drawbacks of each class's QAS, as well as the problems with the corresponding study. Results are detailed summarized and compared. As a result of this study, a general architecture of frameworks for QA over knowledge base (KB) is drawn in addition to the comparative analysis of systems, serving as a reference for academics working on related topics. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Question answering

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3.5 µm watt-level all-fiber Er3+-doped laser based on high-damage-resistant multi-color dielectric fiber mirrors

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Optics Express 2025年第4期33卷 6808-6819页

作者： Zhou, Xin Wang, Ning Song, Luming Huang, Lu Su, Jue Bu, Yikun Luo, Zhengqian Fujian Key Laboratory of Ultrafast Laser Technology and Applications School of Electronic Science and Engineering Xiamen University Xiamen361005 China Xiamen361005 China

We report ∼3.5 µm watt-level continuous-wave (CW) and gain-switched all-fiber Er3+: ZBLAN lasers using multi-color dielectric fiber mirrors (DFMs). A section of 1 mol.% Er3+: ZBLAN double-clad fiber with the 976/1976 nm dual-wavelength pumping provides ∼3.5 µm optical gain, and two home-made mid-IR DFMs as the input/output cavity mirrors are used to construct ∼3.5 µm all-fiber resonant cavity by self-made FC/PC fiber connectors. The key is to optimize the film structures of the DFMs and the standing-wave field in the film stacks for 0.98/1.98/2.8/3.5 µm multi-color anti- or high-reflection operation and high damage density of >2.5 MW/cm2 (CW) and >74 J/cm2 (pulse) at 3.5 µm which is crucial for mid-IR high-power laser generation. We perform the three following experiments: (1) stable 3.5 µm CW laser operation generates a maximum output power of 1.11 W and the power fluctuation is less than 1.23%;(2) 3.5 µm gain-switching operation with the tunable repetition rate of 10-20 kHz achieves the maximum pulse energy of 32.7 µJ and pulse duration of 1.21 µs;(3) comparison study on the 1976 nm core-pumping or clad-pumping scheme (976 nm clad-pumping always) shows that the 976/1976 nm clad-pumping scheme readily generates 2.8/3.5 µm dual-wavelength lasing with a lower conversion efficiency. This work may offer an alternative solution for low-cost, high-performance, all-fiber mid-IR CW and pulsed laser beyond 3 µm. © 2025 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

关键词： Pulse repetition rate

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