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Biosensors 2025年第5期15卷 317-317页

作者： Sun, Wenhua Hu, Kunling Song, Ziting An, Ran Liang, Xingguo State Key Laboratory of Marine Food Processing & Safety Control College of Food Science and Engineering Ocean University of China No. 1299 Sansha Road Qingdao266404 China Laboratory for Marine Drugs and Bioproducts Qingdao Marine Science and Technology Center No. 1 Wenhai Road Qingdao266237 China

Rolling circle amplification (RCA) at ambient temperature is prone to false positive signals during nucleic acid detection, which makes it challenging to establish an efficient RCA detection method. The false positive signals are primarily caused by binding of non-target nucleic acids to the circular single-stranded template, leading to non-specific amplification. Here, we present an RCA method for miRNA detection at 37 °C using two circular ssDNAs, each of which is formed by ligating the intramolecularly formed nick (without any splint) in a secondary structure. The specific target recognition is realized by utilizing low concentrations (0.1 nM) of circular ssDNA1 (C1). A phosphorothioate modification is present at G*AATTC on C1 to generate a nick for primer extension during the primer self-generated rolling circle amplification (PG-RCA). The fragmented amplification products are used as primers for the following RCA that serves as signal amplification using circular ssDNA2 (C2). Notably, the absence of splints and the low concentration of C1 significantly inhibits non-target binding, thus minimizing false positive signals. A high concentration (10 nM) of C2 is used to carry out linear rolling circle amplification (LRCA), which is highly specific. This strategy demonstrates a good linear response to 0.01–100 pM of miRNA with a detection limit of 7.76 fM (miR-155). Moreover, it can distinguish single-nucleotide mismatch in the target miRNA, enabling the rapid one-pot detection of miRNA at 37 °C. Accordingly, this method performs with high specificity and sensitivity. This approach is suitable for clinical serum sample analysis and offers a strategy for developing specific biosensors and diagnostic tools. © 2025 by the authors.

关键词： Diagnostic products

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Overlooked Self-Catalytic Mechanism in Phenolic Moiety-Mediated Fenton-Like System: Formation of Fe(Iii) Hydroperoxide Complex and Co-Treatment of Refractory Pollutants

SSRN

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SSRN 2022年

作者： Chen, Cheng Wang, Yongyi Huang, Yajing Hua, Jian Qu, Wei Xia, Dehua He, Chun Sharma, Virender K. Shu, Dong Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-Sen University Guangzhou510275 China Guangdong Key Laboratory of Agricultural Environment Pollution Integrated Control Guangdong Institute of Eco-Environmental and Soil Sciences Guangzhou510640 China Department of Occupational and Environmental Health School of Public Health Texas A&M University College StationTX77843 United States Key Lab of Technology on Electrochemical Energy Storage and Power Generation Guangdong Universities School of Chemistry and Environment South China Normal University Guangzhou510006 China

Applications of Fenton-like reactions (Fe(III)/H2O2) without catalysts have low efficiency in remediating pollutants. Herein, pollutants containing phenolic moiety (P, e.g., paracetamol (PCM)) were demonstrated to make Fe(III)/H2O2 system highly effective in degrading a wide range of contaminants. Kinetics analysis shows the self-catalytic degradation of PCM with optimum performance at pH 4.0, and Fe(III)/Fe(II) conversion was accelerated without the assistance of cocatalyst. Based on state-of-art spectroscopy measurements and theoretical calculations, the overlooked self-catalytic mechanism was revealed. In the presence of phenolic moiety, a yellow-colored high-spin P-Fe(III)-OOH complex can be formed in Fe(III)/H2O2 system, which subsequently converts to Fe(II). Afterwards, the oxidation of P gives hydroquinone that also facilitates the cycling of Fe(III)/Fe(II). The accumulation of Fe(II) reacts with H2O2 to generate hydroxyl radicals, the major species responsible to oxidize pollutants, thereby achieving efficient decontaminant performance. Results provide new insights into the self-catalytic Fenton-like process for remediating a mixture of pollutants. © 2022, The Authors. All rights reserved.

关键词： Catalysis

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Fuzzy Knowledge Distillation from High-Order TSK to Low-Order TSK

arXiv

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arXiv 2023年

作者： Zhang, Xiongtao Yin, Zezong Jiang, Yunliang Jiang, Yizhang Sun, Danfeng Liu, Yong The Zhejiang Province Key Laboratory of Smart Management&Application of Modern Agricultural Resources Huzhou University Huzhou313000 China The School of Information Engineering Huzhou University Huzhou313000 China The School of Computer Science and Technology Zhejiang Normal University Jinhua321004 China The School of Artificial Intelligence and Computer Science Jiangnan University Wuxi214122 China Ministry of Education Wuhan430074 China The School of Computer Science Hangzhou Dianzi University Hangzhou310018 China The College of Control Science and Enginneering Zhejiang University Hangzhou310007 China

High-order Takagi-Sugeno-Kang (TSK) fuzzy classifiers possess powerful classification performance yet have fewer fuzzy rules, but always be impaired by its exponential growth training time and poorer interpretability owing to High-order polynomial used in consequent part of fuzzy rule, while Low-order TSK fuzzy classifiers run quickly with high interpretability, however they usually require more fuzzy rules and perform relatively not very well. Address this issue, a novel TSK fuzzy classifier embeded with knowledge distillation in deep learning called HTSK-LLM-DKD is proposed in this study. HTSK-LLM-DKD achieves the following distinctive characteristics: 1) It takes High-order TSK classifier as teacher model and Low-order TSK fuzzy classifier as student model, and leverages the proposed LLM-DKD (Least Learning Machine based Decoupling Knowledge Distillation) to distill the fuzzy dark knowledge from High-order TSK fuzzy classifier to Low-order TSK fuzzy classifier, which resulting in Low-order TSK fuzzy classifier endowed with enhanced performance surpassing or at least comparable to High-order TSK classifier, as well as high interpretability;specifically 2) The Negative Euclidean distance between the output of teacher model and each class is employed to obtain the teacher logits, and then it compute teacher/student soft labels by the softmax function with distillating temperature parameter;3) By reformulating the Kullback-Leibler divergence, it decouples fuzzy dark knowledge into target class knowledge and non-target class knowledge, and transfers them to student model. The advantages of HTSK-LLM-DKD are verified on the benchmarking UCI datasets and a real dataset Cleveland heart disease, in terms of classification performance and model interpretability. Copyright © 2023, The Authors. All rights reserved.

关键词： Distillation

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Positive effect of metal cations on direct electron transfer-based CoAl-NC activated peroxymonosulfate oxidation: key role of hydration layer

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Applied Catalysis B: Environment and Energy 2025年

作者： Qingcan Zhou Dongwei Lu Huirong Zhang Jinfeng Lu Mingrui He YinKun Sun Wenyue Wang Xueying Chen Yun Zhang Jun Ma State Key Laboratory of Urban Water Resource and Environment (SKLUWRE) School of Environment Harbin Institute of Technology Harbin 150090 PR China Gansu Key Laboratory for Environmental Pollution Prediction and Control College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 PR China College of Environment Science and Engineering Nankai University Tianjin 300350 China

Inorganic ions tend to limit the efficiency of pollutant degradation during advanced oxidation process, especially for radical pathways, whereas for non-radical pathways, their effects are usually considered to be minor. Interestingly, when cobalt-aluminum layered double oxide was combined with nitrogen-doped carbon (CoAl-NC), the influence of inorganic salts on the degradation of carbamazepine (CBZ) by activated peroxymonosulfate (PMS) shifted to promotion. The facilitation of the removal process by inorganic salts was related to metal cations in the order of Li + > Na + > K + , which was consistent with the changing pattern of hydration layer thickness. It is demonstrated that this promotion is closely related to the mechanism change from singlet oxygen to direct electron transfer (DET) and the metal cation hydration layer. Further investigations revealed that the thickening effect of strong hydration cations on diffusion layer and the stabilizing effect of hydration layer on the particles could enhance the dispersion of CoAl-NC. In-situ Raman spectroscopy suggested that the strongly hydrated cations contributed to efficient electron transfer owing to the formation of a more ordered interfacial water on the CoAl-NC surface by their hydration layer. It strengthened the electron transfer complex (PMS*) and accelerated the electron transfer rate from CBZ to PMS*, thus facilitating the DET process. This study provides insights into the regulation of oxidation pathways and the influence of metal cations on the oxidation mechanism.

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Spatially Extended Sound Source Reconstruction Based on the Non-Synchronous Measurements of Microphone Arrays and Bayesian Compressive Sensing

SSRN

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SSRN 2023年

作者： Yu, Su Zhang, Chenyu Hu, Dingyu Yu, Liang School of Urban Rail Transportation Shanghai University of Engineering Science Shanghai201620 China College of Power and Energy EngineeringHarbin Engineering University Harbin150006 China Shanghai Engineering Research Center of Railway Noise and Vibration Control Shanghai201620 China Institute of Vibration Shock and Noi1se State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai200240 China School of Civil Aviation Northwestern Polytechnical University Xi’an710072 China

The traditional near-field acoustic holography technology (NAH) needs to adapt to the Nyquist sampling theorem, which requires numerous sampling points to be arranged on the holography plane to obtain accurate sound source reconstruction results. The Non-synchronous Measurements (NSM) was proposed to enhance the accuracy of reconstruction and reduce the measurement cost. However, the investigated object of conventional NSM are only sparsely distributed sound sources, and limited attention is paid to the reconstructed accuracy of the spatially extended sound source. In this article, the traditional NSM is further investigated in the spatially extended sound source, and the sound pressure information is reconstructed by Bayesian compressive sensing algorithm (BCS). Firstly, the spatially extended sound source is scanned by moving the rectangular microphone array, and the measurement effects of the microphone array with large aperture and high density are approximately obtained by using NSM technique. Then, BCS is applied to reconstruct sound field by the NSM of sound pressure. The results of numerical simulations demonstrate that the proposed study is applicable to the spatially extended sound source. NSM has advantages in reconstruction accuracy compared with the single measurement. At the same time, the reconstructed sound pressure under NSM can replace the simultaneous measurement(SM) results of multi-array without reference microphone, which avoids the limitation of using reference microphone in increasing the number of channels and spatial layout. The effectiveness and feasibility of the investigation are further proved by the experimental results of the driven steel plate. © 2023, The Authors. All rights reserved.

关键词： Compressed sensing

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Lab-on-hybrid materials: Color-brand multitarget fluorescence detection with white-light-emitting flexible materials

引用

Dyes and Pigments 2025年 242卷

作者： Ning Gao Xi Chen Haoran Wu Xuelei Pang Xudong Yu Hebei Provincial Key Laboratory of Photoelectric Control on Surface and Interface and College of Science Hebei University of Science and Technology Yuxiang Street 26 Shijiazhuang 050080 PR China School of Environment Science & Engineering Hebei University of Science and Technology Yuxiang Street 26 Shijiazhuang 050080 PR China

Chemical production requires the rapid and highly sensitive detection of trace volatile substances. Although the commonly used multichannel combined detection methods are quantitatively accurate, they require the joint operation of multiple devices and are unsuitable for on-site detection. Fluorescence detection technology has attracted considerable interest in the sensing field owing to its high sensitivity, low cost, and multicolor changes, although cost reduction requires the preparation of portable and sensitive on-site detection materials. In this paper, single-wavelength-excited complexes are integrated into a rare-earth organic–inorganic hybrid thin film that senses and identifies multiple target analytes. The volatilization characteristics of the gas generated during production were simulated on five common acidic and amine volatile substances as target compounds, verifying the detection ability of the material. By virtue of their different quenching mechanisms—energy competition, hydrogen bonding, and energy resonance—the channels produce different responses to each volatile substance, causing changes in the fluorescence color. As the detected substances generate different fluorescence-change processes and final colors, a change path similar to a fluorescence fingerprint is formed, enabling qualitative and quantitative analyses. Exploiting the flexibility of the thin film and its responses to different target substances, a system that encrypts and decrypts information was then designed. The proposed lab-on hybrid material simplifies the multitarget identification process and has substantial potential for various sensing applications.

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A Power De-coupling control Strategy for MMC-HVDC System

A Power De-coupling Control Strategy for MMC-HVDC System

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作者： Mingguang Zhang Jianhua Chang Chengming Yang Zilin Liu College of Electrical and Information Engineering Lanzhou University of Technology Key Laboratory of Gansu Advanced Control for Industrial Processes Lanzhou University of Technology

Modular multilevel converter(MMC) has a wide range of applications in the field of HVDC. However, some of the electricity in MMC is coupled, which makes the design of control system more difficult and have a negative impact on the stable operation of the system. This paper puts forward a strategy to eliminate the coupling control, this method compensates the current cross-coupling terms of the d-axis and the q-axis in the dq coordinate system, SOGI(Second Order Generalized Integrator) and Q-PR(Quasi-PR) controller are used to accurately control the double frequency circulation in the internal unbalanced current, the coupling caused by the internal unbalance current and the sub-capacitor module voltage is compensated in the three-phase coordinate system. Finally, the simulation verification is carried out in PSCAD, which is compared with the traditional control method to verify that the proposed method can achieve complete power decoupling.

关键词： Modular multilevel converter Internal unbalance current Submodule capacitance voltage De-coupling control

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Three Co-Based Tartratoborates with Fundamental Building Blocks [B(C4h2o6)2]5− from Facile Condensation Reactions

SSRN

引用

SSRN 2022年

作者： Yan, Dong Ma, Yao Mao, Fei-Fei Hu, Liang Zheng, Jie Zhang, Xiu-Du Chen, Wen-Tong Li, Shu-Fang Key Laboratory of Functional Molecular Solids Ministry of Education College of Chemistry and Materials Science Anhui Normal University Wuhu241002 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou350002 China College of Science Nanjing Agricultural University Nanjing210095 China Institute of Applied Chemistry School of Chemistry and Chemical Engineering Jian Key Laboratory of Photoelectric Crystal Materials and Device Jiangxi Province Key Laboratory of Coordination Chemistry Humic Acid Utilization Engineering Research Center of Jiangxi Province Jinggangshan University Jiangxi Jian343009 China Department of Ecological and Resources Engineering Fujian Key Laboratory of Eco-Industrial Green Technology Wuyi University Wuyishan Fujian 354300 China

The key to fabricate novel borate nonlinear optical (NLO) materials is the construction of NLO-active structural building blocks. Herein three new cobalt (II) tartratoborates based on novel [B(C4H2O6)2]5− fundamental building block (FBB), namely, Co5[(C4H2O6)2B]2(H2O)6 (1), KCo2[(C4H2O6)2B](H2O)3 (2), and NH4Co2[(C4H2O6)2B](H2O)2·H2O (3), have been synthesized by hydrothermal method. Compound 1 crystallizes in the centric space group of P1 and features a novel three-dimensional (3D) network, which is composed of 2D {Co3[(C4H2O6)2B]2(H2O)2}2- anionic layers connected by Co(2)O6 octahedral. Compounds 2 and 3 both crystallize in the space group of P212121. Compound 2 presents a 3D structure which is formed by 2D {Co2[(C4H2O6)2B](H2O)2}− layers interconnected by K(1)O8 polyhedra, whereas the structure of compound 3 is composed of 2D {Co2[(C4H2O6)2B](H2O)2}− layers separated by NH4+. Magnetic measurements show that the adjacent Co2+ ions in compounds 2 and 3 exhibit dominant antiferromagnetic interactions. Furthermore, UV-vis and infrared spectra, theoretical calculation and thermal analyses were also performed. © 2022, The Authors. All rights reserved.

关键词： Crystal structure

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Size distribution of particulate polycyclic aromatic hydrocarbons in fresh combustion smoke and ambient air: A review

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Journal of Environmental sciences 2020年第2期32卷 370-384页

作者： Lulu Zhang Lu Yang Quanyu Zhou Xuan Zhang Wanli Xing Yongjie Wei Min Hu Lixia Zhao Akira Toriba Kazuichi Hayakawa Ning Tang Graduate School of Medical Sciences Kanazawa UniversityKakuma-machiKanazawa 920-1192Japan State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environment SciencesBeijing 100012China State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Institute of Medical Pharmaceutical and Health SciencesKanazawa UniversityKakuma-machiKanazawa 920-1192Japan Institute of Nature and Environmental Technology Kanazawa UniversityKakuma-machiKanazawa 920-1192Japan

Polycyclic aromatic hydrocarbons(PAHs) are ubiquitous in the atmosphere and they mostly stem from the imperfect combustion of fossil fuels and *** are inherently associated with homogenous fine particles or distributed to different-sized particles during the aging of air *** carried by fine particles undergo a long-range transport to remote areas while those adsorbed on coarse particles have a shorter lifetime in ambient *** importantly, PAHs with higher molecular weights tend to be bound with finer particles and can deeply enter the lungs, posing severe health risks to ***, the environmental fate and health effects of particulate PAHs are strongly *** review summarizes the size distributions of particulate PAHs freshly emitted from combustion sources as well as the distribution patterns of PAHs in ambient *** was found that PAHs from stationary sources are primarily bound to fine particles, which are slightly larger than particles to which PAHs from mobile sources are *** ambient air, particulate PAHs are distributed in larger size modes than those in the combustion fume, and the particle size decreases with PAH molecular weight *** relevant mechanisms and influencing factors of particle size distribution changes are illustrated in this article, which are essentially attributed to combustion and ambient temperature as well as the physical and chemical properties of ***, the study on the particle size distribution of PAHs will contribute for a full understanding of the origin, atmospheric behaviors and health effects of particulate PAHs.

关键词： Atmospheric pollution Coal combustion Biomass burning Vehicle exhaust Gas–particle partitioning

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Swelling inhibition and percolation promotion of PQ-10 on weathered crust elution-deposited rare earth ores

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Journal of Rare Earths 2025年

作者： Sha, Aoyang Yang, Huifang Jiang, Meiling He, Zhengyan Liu, Zhenhu Xu, Zhigao Du, Yaguang Wu, Ming Chi, Ru'an Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education Key Laboratory of Resources Conversion and Pollution Control of the State Ethnic Affairs Commission & Hubei Key Laboratory of Catalysis and Materials Science College of Resources and Environmental Science South-Central Minzu University Wuhan430074 China Key Laboratory for Green Chemical Process of Ministry of Education School of Resources & Safety Engineering Wuhan Institute of Technology Wuhan430073 China

Weathered crust elution-deposited rare earth ores (WREOs) are rich in medium and heavy rare earth. In order to improve the in-situ leaching process, which is prone to landslides and poor permeability, cationic hydroxyethyl cellulose (PQ-10) was used as a novel green swelling inhibitor and percolation promoter and was mixed with conventional leaching agent ammonium sulfate ((NH4)2SO4) to form a composite leaching agent to study the performance and mechanism of swelling inhibition and percolation promotion. Adding PQ-10 can inhibit the hydration swelling of WREOs, promote the percolation effect of the leaching agent, improve the rare earth (RE) leaching efficiency, and reduce the impurity aluminum (Al) leaching efficiency. Compared with the conventional leaching agent 2 wt% (NH4)2SO4, the percolation time is reduced by 50% by using the composite leaching agent (0.02 wt% PQ-10 + 2 wt% (NH4)2SO4). PQ-10 has positively charged quaternary ammonium groups and hydrophilic group hydroxyl groups, which makes it easy to adsorb on WREOs multiple sites through electrostatic interaction and hydrogen bonding, weakening the electrostatic repulsion between mineral particles, reducing the WREOs interlayer spacing, compressing the double electric layer thickness at the solid–liquid interface, weakening the mineral hydration swelling and increasing the percolation rate. The long carbon chains of the polymer entangle and link the fine mineral particles to agglomerate them, increasing their particle size and reducing their hydration dispersion, and preventing blockage of the percolation pores caused by migration of the fine particles through the ore body with the solution. PQ-10 molecules also insert the mineral interlayer and expulsion of the internal water, further inhibiting the swelling of WREOs. Adding PQ-10 reduces the surface tension of (NH4)2SO4 solution, improving the spreading and spreading ability of the solution, reducing the adhesion work between molecules in the solid–liqui

关键词： Sulfate minerals

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