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Investigating the Molecular Rearrangement of Polar Liquid Mixtures Using Terahertz Frequency Domain Reflection Spectroscopy

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JOURNAL OF PHYSICAL CHEMISTRY A 2023年第25期127卷 5502-5510页

作者： Jiao, Yufeng Ruan, Cunjun Chen, Kanglong Wu, Yubo He, Wenlong Beihang Univ Sch Elect & Informat Engn Beijing 100191 Peoples R China Beihang Univ Beijing Key Lab Microwave Sensing & Secur Applica Beijing 100191 Peoples R China Shenzhen Univ Coll Elect & Informat Engn Shenzhen 518061 Peoples R China

A special data processing method for the terahertz frequency domain reflection spectroscopy system has been proposed to analyze the characteristics of a polar mixed liquid. This novel and practical measurement system is characterized by a simpler optical structure and a tunable output frequency range of 0.1-1 THz. By Hilbert transform, stationary wavelet transform, and time domain zero setting method, the reflection coefficient that has been eliminated by the noise and the Fabry-Perot effect can be obtained by the self-reference calibration method. Then, the dielectric function of the ethanol/n-hexane and propanol/n-hexane mixtures with different mixture ratios can be extracted by this method. In addition, a significant deviation can be observed between the imaginary part of the measured dielectric function and the ideal calculated value. These results indicate that during the mixing process of polar and nonpolar liquids, the hydroxyl functional groups of alcohols significantly change the molecular arrangement pattern of the mixture. The arrangement pattern will result in the formation of the new permanent dipole moment. This study lays a solid foundation for future research on the microscopic mechanism of intermolecular interaction using terahertz frequency domain reflection spectroscopy.

关键词： Alcohols Insulators Liquids Mixtures Molecules

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Influence Mechanism of the Surface Topography on the Positioning Measurement Accuracy of Micro-Vision Pattern Targets

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IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2025年 74卷

作者： Zhu, Zijian Zhao, Chenyang Yang, Yang Xi, Yueping Harbin Inst Technol Shenzhen Sch Robot & Adv Mfg Shenzhen 518055 Peoples R China

In micro-vision-based positioning, designing special patterns as positioning targets is key to improving the positioning accuracy and measurement range. Many scholars, however, improve the accuracy by processing different targets and designing different algorithms while ignoring the influence of microtopography/nanotopography distribution on positioning measurement. From this perspective, this article focuses on two micro-surface processing methods, ultraprecision machining, and photolithography, to explore the mechanism of the influence of the surface topography on the positioning measurement accuracy. The influence of the processing technology on the positioning accuracy and the optimal processing parameters are obtained via exploring the influence of the processing technology on the 3-D topography, the influence of the 3-D topography on the imaging grayscale, and the influence of the grayscale distribution on positioning measurement. The experimental results are consistent with the theoretical analysis. For ultraprecision machining, there is an optimal value for the cutting speed and the positioning accuracy is proportional to the cutting depth. For photolithography, the positioning accuracy is proportional to the surface reflectivity difference. Under the optimal parameter configuration, the standard deviation (STD) of repeated positioning can reach 1.69 nm.

关键词： Surface topography Position measurement Semiconductor device measurement Accuracy Springs Plastics Gray-scale Optical surface waves Machining Etching Grayscale micro-vision positioning measurement surface topography

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Natural enzyme cascade bimetallic sulfide MoCuSx nanozyme for synergistic photothermal/photodynamic enhanced chemodynamic antimicrobial therapy of wound infection

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CHEMICAL ENGINEERING JOURNAL 2024年 499卷

作者： Xu, Caiyun Li, Junqin Ou, Chunlei Yang, Jing Fu, Shuting Hu, Weiqing Wang, Li Wang, Zefeng Hai, Luo Deng, Le He, Dinggeng Hunan Normal Univ Inst Interdisciplinary Studies Coll Life Sci State Key Lab Dev Biol Freshwater Fish Changsha 410081 Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Canc Hosp Natl Canc Ctr Natl Clin Res Ctr CancCent Lab & Shenzhen Key Lab Shenzhen 518116 Peoples R China Chinese Acad Med Sci & Peking Union Med Coll Shenzhen Hosp Shenzhen 518116 Peoples R China

Chemodynamic therapy (CDT) involving highly toxic hydroxyl radical (center dot OH) with no drug resistance has gained widespread attention for antibacterial applications. However, the CDT effect is seriously confined by overexpressed glutathione (GSH) and limited hydrogen peroxide (H2O2) in the infection sites. Here, we have constructed a cascade enzyme/nanozyme assembly (MCS/GO(x)) composing of a bimetallic sulfide MoCuSx (MCS) nanozyme loaded with natural glucose oxidase (GOx) for synergistic photothermal/photodynamic enhanced chemodynamic antimicrobial therapy with high performance. The loaded GOx can promote the peroxidase (POD)-like activity of MCS by providing an acidic microenvironment and self-supplying H2O2, achieving cascade generation of center dot OH for efficient CDT. The CDT effect can be further promoted by a co-catalysis mediated by the Mo4+/Mo6+ redox couple. Upon exposure to an 808 nm near-infrared laser, MCS/GOx provides hyperpyrexia for photothermal antibacterial therapy (PTT), and produce singlet oxygen (1O2) for photodynamic therapy (PDT). Moreover, MCS/GOx can significantly consume antioxidant glutathione via the Cu+/Cu2+ redox couple and PDTmediated O-1(2) production, thereby enhancing CDT antibacterial effect. In vitro experiments exhibit that MCS/GOx has combined antimicrobial effect against Staphylococcus aureus and Escherichia coli. Further in vivo studies demonstrate that MCS/GOx can efficiently eliminate bacterial cells in wound tissues and accelerate wound healing with low inflammatory response and good biosafety. Consequently, the proposed MCS/GOx with multiple bactericidal modalities shows a great potential in fighting wound infections.

关键词： Chemodynamic therapy Photodynamic therapy Cascade catalysis Wound infection MoS2

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Blockchain-empowered multi-skilled crowdsourcing for mobile web 3.0

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COMPUTER COMMUNICATIONS 2025年 232卷

作者： Li, Yu Lu, Yueheng Yang, Xinyu Xu, Wenjian Peng, Zhe Hangzhou Dianzi Univ Dept Comp Hangzhou 310018 Zhejiang Peoples R China Zhejiang Univ Sci & Technol Sch Informat & Elect Engn Hangzhou 310023 Peoples R China Hong Kong Polytech Univ Dept Ind & Syst Engn Hong Kong Peoples R China Hong Kong Polytech Univ Shenzhen Res Inst Shenzhen 518057 Peoples R China

As the next generation of the world wide web, web 3.0 is envisioned as a decentralized internet which improves data security and self-sovereign identity. The mobile web 3.0 mainly focuses on decentralized internet for mobile users and mobile applications. With the rapid development of mobile crowdsourcing research, existing mobile crowdsourcing models can achieve efficient allocation of tasks and responders. Benefiting from the inherent decentralization and immutability, more and more crowdsourcing models over mobile web 3.0 have been deployed on blockchain systems to enhance data verifiability. However, executing these crowdsourcingoriented smart contracts on a blockchain may incur a large amount of gas consumption, leading to significant costs for the system and increasing users' expenses. In addition, the existing crowdsourcing model does not take into account the expected quality of task completion in the matching link between tasks and responders, which will cause some tasks to fail to achieve effects and damage the interests of task publishers. In order to solve these problems, this paper proposes a decentralized multi-skill mobile crowdsourcing model with guaranteed task quality and gas optimization (DMCQG), which performs task matching while considering skill coverage and expected quality of task completion, and guarantees the final completion quality of each task. In addition, DMCQG also optimizes the gas value consumed by smart contracts at the code level, reducing the cost of crowdsourcing task participation. In order to verify whether DMCQG is effective, we deployed the model on the Ethereum platform for testing. Through inspection, it was proved that the final expected quality of the tasks matched by DMCQG was better than other models. And it is verified that after optimization, the gas consumption of DMCQG is significantly reduced.

关键词： Blockchain Smart contract Mobile crowdsourcing Web 3.0

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Unveiling the potential of photonic crystal surface emitting lasers: a concise review

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SEMICONDUCTOR science AND technology 2025年第4期40卷 043001-043001页

作者： Huang, Hai Yang, Chuanyi Li, Hui Zhang, Zhaoyu Chinese Univ Hong Kong Sch Sci & Engn Guangdong Key Lab Optoelect Mat & Chips Shenzhen Peoples R China Chinese Univ Hong Kong Sch Sci & Engn Shenzhen Key Lab Semicond Lasers Shenzhen Peoples R China Chinese Univ Hong Kong Sch Sci & Engn Shenzhen Peoples R China Shenzhen Technol Univ Coll Integrated Circuit & Optoelect Chips Shenzhen Peoples R China

Traditional semiconductor lasers, despite their versatility, face significant challenges in beam control, power output, and temperature sensitivity. Photonic crystal surface emitting lasers (PCSELs) overcome these limitations by employing a two-dimensional photonic crystal structure, enabling large-area, high-power, coherent laser emission with narrow beam divergence and narrow linewidth. This review offers a concise overview of PCSEL technology, concentrating on its design principles, fabrication processes, and potential applications. We trace the development of PCSELs from their initial demonstration in 1999 to recent breakthroughs achieving 50 W output power with ultra-narrow beam divergence. Furthermore, we explore the fundamental design principles of PCSELs, including mode analysis, threshold current, and injection design. Key steps in PCSEL fabrication are outlined, emphasizing methods such as regrowth epitaxy and transparent conductor deposition. Finally, we compare PCSELs with established semiconductor laser types, highlighting their applications and prospects.

关键词： semiconductor laser high-brightness high power photonic crystal surface emitting laser

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Boosting Robustness in Deep Neuro-Fuzzy Systems: Uncovering Vulnerabilities, Empirical Insights, and a Multiattack Defense Mechanism

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IEEE TRANSACTIONS ON FUZZY SYSTEMS 2025年第1期33卷 255-266页

作者： Wang, Jia Zhang, Weilong Huang, Zushu Li, Jianqiang Shenzhen Univ Coll Comp Sci & Software Engn Shenzhen 518000 Peoples R China Shenzhen Univ Natl Engn Lab Big Data Syst Comp Technol Shenzhen 518000 Peoples R China

Deep neuro-fuzzy systems (DNFS) have emerged as a hybrid machine learning approach that has found applications in a wide range of fields, including healthcare, transportation, and finance. However, we empirically demonstrate that DNFS is vulnerable to adversarial examples generated by various attack algorithms, raising numerous concerns about its reliability in security-critical scenarios. Existing defense mechanisms designed for deep neural networks (DNNs) often rely on specific knowledge of attacks and their parameters. Consequently, considering the diversity and uncertainty of potential attacking methods, designing defense strategies to enhance the robustness of DNN-based and DNFS-based models against multiple attacks still remains a challenging task. In this work, we propose a comprehensive defense mechanism, named perturbation destruction and information recovery (PDIR), for image classification tasks, that achieves practical robustness against multiple attacks. PDIR employs a combination of perturbation destruction through randomization and multiplication and information recovery using a pixel-to-pixel network. Experimental results demonstrate that PDIR outperforms state-of-the-art defenses, such as joint photographic experts group (JPEG), total variation minimization (TVM), adaptive diversity promoting (ADP), gradient alignment loss (GAL), diversifying vulnerabilities for enhanced robust generation of ensembles (DVERGE), and transferability reduced smooth, against both white-box and black-box attacks.

关键词： Robustness Perturbation methods Fuzzy systems Fuzzy logic Training Glass box Fuzzy sets Adversarial robustness deep neuro-fuzzy systems (DNFS) multiattack defense

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Sub-region based radiomics analysis for prediction of isocitrate dehydrogenase and telomerase reverse transcriptase promoter mutations in diffuse gliomas

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CLINICAL RADIOLOGY 2024年第5期79卷 e682-e691页

作者： Zhang, H. Ouyang, Y. Zhang, H. Zhang, Y. Su, R. Zhou, B. Yang, W. Lei, Y. Huang, B. Sun Yat Sen Univ Affiliated Hosp 7 Dept Radiol Shenzhen 517108 Peoples R China Southern Med Univ Guangdong Prov Peoples Hosp Guangdong Acad Med Sci Dept Radiol Guangzhou 510080 Peoples R China Southern Med Univ Sch Clin Med 2 Guangzhou 510515 Peoples R China Shenzhen Univ Shenzhen Peoples Hosp 2 Hlth Sci Ctr Dept RadiolAffiliated Hosp 1 Shenzhen 518035 Guangdong Peoples R China Southern Med Univ Guangdong Acad Med Sci Guangdong Prov Peoples Hosp 106 Zhongshan 2nd Rd Guangzhou 510080 Peoples R China

AIM: To enhance the prediction of mutation status of isocitrate dehydrogenase (IDH) and telomerase reverse transcriptase (TERT) promoter, which are crucial for glioma prognostication and therapeutic decision-making, via sub-regional radiomics analysis based on multiparametric magnetic resonance imaging (MRI). MATERIALS AND METHODS: A retrospective study was conducted on 401 participants with adult-type diffuse gliomas. Employing the K-means algorithm, tumours were clustered into two to four subregions. Sub-regional radiomics features were extracted and selected using the Mann -Whitney U -test, Pearson correlation analysis, and least absolute shrinkage and selection operator, forming the basis for predictive models. The performance of model combinations of different sub-regional features and classi fiers (including logistic regression, support vector machines, K-nearest neighbour, light gradient boosting machine, and multilayer perceptron) was evaluated using an external test set. RESULTS: The models demonstrated high predictive performance, with area under the receiver operating characteristic curve (AUC) values ranging from 0.918 to 0.994 in the training set for IDH mutation prediction and from 0.758 to 0.939 for TERT promoter mutation prediction. In the external test sets, the two-cluster radiomics features and the logistic regression model yielded the highest prediction for IDH mutation, resulting in an AUC of 0.905. Additionally, the most effective predictive performance with an AUC of 0.803 was achieved using the four -cluster radiomics features and the support vector machine model, specifically for TERT promoter mutation prediction. CONCLUSION: The present study underscores the potential of sub -regional radiomics analysis in predicting IDH and TERT promoter mutations in glioma patients. These models have the capacity to refine preoperative glioma diagnosis and contribute to personalised therapeutic interventions for patients. (c) 2024 Published by Elsevier Lt

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Stimulus-Responsive Hydrogels as Drug Delivery Systems for Inflammation Targeted Therapy

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ADVANCED science 2024年第1期11卷 e2306152页

作者： Yu, Haoyu Gao, Rongyao Liu, Yuxin Fu, Limin Zhou, Jing Li, Luoyuan Sun Yat Sen Univ Affiliated Hosp 8 Shenzhen 518033 Guangdong Peoples R China Renmin Univ China Dept Chem Beijing 100872 Peoples R China Max Planck Inst Colloids & Interfaces Dept Biomol Syst D-14476 Potsdam Germany Capital Normal Univ Dept Chem Beijing 100048 Peoples R China

Deregulated inflammations induced by various factors are one of the most common diseases in people's daily life, while severe inflammation can even lead to death. Thus, the efficient treatment of inflammation has always been the hot topic in the research of medicine. In the past decades, as a potential biomaterial, stimuli-responsive hydrogels have been a focus of attention for the inflammation treatment due to their excellent biocompatibility and design flexibility. Recently, thanks to the rapid development of nanotechnology and material science, more and more efforts have been made to develop safer, more personal and more effective hydrogels for the therapy of some frequent but tough inflammations such as sepsis, rheumatoid arthritis, osteoarthritis, periodontitis, and ulcerative colitis. Herein, from recent studies and articles, the conventional and emerging hydrogels in the delivery of anti-inflammatory drugs and the therapy for various inflammations are summarized. And their prospects of clinical translation and future development are also discussed in further detail. Deregulated Inflammation is one of the most common diseases in human health, and its management remains a significant challenge. Notably, stimulus-responsive hydrogels have great potential to break through the predicament faced by severe inflammations treatment. This review highlights on the recent advances of stimulus-responsive hydrogels for inflammation therapy and challenges in this area, to provide incentive for their further ***

关键词： drug delivery immune responses inflammation targeted therapy inflammatory microenvironments stimulus-responsive hydrogels

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Design strategies of high-performance lead-free electroceramics for energy storage applications

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Rare Metals 2024年第3期43卷 853-878页

作者： Biao Guo Fei Jin Li Li Zi-Zhao Pan Xin-Wei Xu Hong Wang Department of Materials Science and Engineering College of EngineeringSouthern University of Science and TechnologyShenzhen518055China School of Microelectronics and State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China

A greater number of compact and reliable electrostatic capacitors are in demand due to the Internet of Things boom and rapidly growing complex and integrated electronic systems,continuously promoting the development of high-energy-density ceramic-based *** significant successes have been achieved in obtaining high energy densities in lead-based ferroelectric ceramics,the utilization of lead-containing ceramies has been restricted due to environmental and health hazards of ***-free ferroelectric ceramics have garnered tremendous attention and are expected to replace lead-based ceramics in the near ***,the energy density of lead-free ceramics is still lagging behind that of lead-containing ***,severely limiting their *** efforts have been made to enhance the energy storage performance of lead-free ceramics using multi-scale design strategies,and exciting progress has been achieved in the past *** review briefly discusses the energy storage mechanism and fundamental characteristics of a dielectric capacitor,summarizes and compares the state-of-the-art design strategies for high-energy-density lead-free ceramics,and highlights several critical issues and requirements for industrial *** prospects and challenges of lead-free ceramics for energy storage applications are also discussed.

关键词： Dielectric materials Lead-free ceramic Environment friendly Energy storage Design strategy

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Carboxymethyl Chitosan-Based Antioxidant Hydrogel Accelerates Diabetic Wound Healing

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ADVANCED HEALTHCARE MATERIALS 2025年第4期14卷 e2403198页

作者： Zhang, Jiaying Zhao, Shifang Zhou, Yifan Liang, Hongze Zhao, Lingling Tan, Hui Ningbo Univ Sch Mat Sci & Chem Engn Ningbo 311215 Peoples R China Shenzhen Childrens Hosp Infect Dis Dept Shenzhen 518038 Peoples R China

Diabetic wound healing is hampered due to oxidative stress, exacerbated inflammation, and impaired angiogenesis in the wounds. A pH-sensitive antioxidant hydrogel based on carboxymethyl chitosan (CMCS), oligoprocyanidins (OPC), and oxide dextran (Oxd) is prepared to accelerate diabetic wound healing. The hydrogel network is formed via imine and hydrogen bonding interactions in the presence of hydroxyl, amino, and aldehyde groups, and deferoxamine (DFO) is incorporated into the hydrogel. The hydrogel shows pH-triggered drug release, a good antioxidant, and anti-inflammatory properties, and can promote tube formation and cell migration in vitro. Moreover, the hydrogel can accelerate wound healing in streptozotocin (STZ)-induced diabetic mice by regulating the inflammation environment with up-regulation of anti-inflammatory factors (IL-4 and IL-10) and down-regulation of pro-inflammatory factors (TNF-alpha and IL-6), and promoting angiogenesis with up-regulation of HIF-1 alpha, VEGF, and CD31. Thus, the pH-sensitive antioxidant hydrogel provides a promising therapeutic strategy for diabetic wound healing.

关键词： anti-inflammatory antioxidant diabetic wound hydrogel wound healing

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