bluuebunny/crossref_metadata_2025_split huggingface dataset:
So sánh kỹ thuật điều khiển tuyến tính hóa vào ra và phương pháp cuốn chiếu cho động cơ không đồng bộ
Authors: Bui Thi Kim Hue  , Mai Nhat Thien  , Luong Hoai Thuong  , Huynh Thi Du  , Ngo Bich Nen  , Huynh Thanh Tuong  
Published: November 2021

Động cơ không đồng bộ ba pha được sử dụng rộng rãi trong công nghiệp vì các ưu điểm như cấu tạo đơn giản, chắc chắn, vận hành tin cậy, ít bảo trì sửa chữa, giá thành thấp, hiệu suất cao… Tuy nhiên, việc điều khiển động cơ không đồng bộ là một vấn đề khó khăn, phức tạp vì tính phi tuyến của mô hình động cơ. Bài báo này ứng dụng kỹ thuật điều khiển hồi tiếp tuyến tính hóa (Feedback Linearization Control – FLC) và phương pháp điều khiển cuốn chiếu (Backstepping) để thiết kế hệ thống điều khiển từ thông và tốc độ động cơ không đồng bộ ba pha, trong đó từ thông và mô-men được ước lượng từ các giá trị dòng điện và điện áp của động cơ. Việc so sánh các thành phần của động cơ (từ thông, tốc độ, mô-men, dòng điện ba pha) của kỹ thuật đề xuất FLC với phương pháp cuốn chiếu được tiến hành. Việc so sánh được thực hiện khi thay đổi tải ở trục động cơ, khả năng bám của tốc độ và độ nhạy khi thay đổi điều kiện vận hành. Các kết quả mô phỏng sẽ cho thấy hiệu quả của phương pháp đề xuất FLC.
Liquid‐Crystal‐Powered Metasurfaces for Electrically and Thermally Switchable Photorealistic Nanoprinting and Optical Security Platform
Authors: Zheng Lin , Liu Yi , Zhang Ni , She Xiaoyi , Jin Chongjun , Shen Yang 
Published: December 2024

AbstractActive or reconfigurable metasurfaces have been considered a promising paradigm for dynamic structural coloration and are starting to find their way into the ultra‐compact integrated optical display and color printing platforms. Generally, an ideal dynamic structural color platform requires full hue‐saturation‐brightness (HSB) control, high switching contrast, and a simple operation manner. Unfortunately, to date, it remains challenging to simultaneously achieve all these features using previous approaches. Here, a novel electrically and thermally switchable reflective nanoprinting platform is reported by integrating polarization‐sensitive silver nanogroove arrays with a twisted nematic LC cell. Compared to conventional LC‐assisted dynamic nanoprinting, the device can simultaneously achieve superior color purity, wider gamut, and higher switching contrast. Moreover, through the implementation of a sub‐pixels scheme, arbitrary colors in the color gamut can be created by a mixture of red, green, and blue (RGB) channels at different ratios. As a proof of concept, dynamic switching of photorealistic nanoprinting with full HSB control at a high pixel density (>4,000 pixels per inch) as well as information switching and steganography are demonstrated, suggesting that the device possesses great potential in optical display and information security applications.
Design and Synthesis of PtPdNiCoMn High‐Entropy Alloy Electrocatalyst for Enhanced Alkaline Hydrogen Evolution Reaction: A Theoretically Supported Predictive Design Approach
Authors: Chandran M Athira , Dutta Pritha , Singh Prashant , Singh Ashutosh K. , Prasad Bhagavatula L. V. 
Published: December 2024

AbstractElectrocatalytic hydrogen generation requires a multifunctional electrocatalyst with abundant active sites to drive multielectron transfer reactions. High entropy alloys (HEA) are five or more‐elements with high configurational entropy are considered unique materials for next‐generation electrocatalysts. Here, in this work, based on new screening guidelines for catalyst selections that combine density‐functional theory calculated Gibbs formation‐enthalpy with bond length and electronegativity variance, a novel HEA electrocatalyst consisting of five elements, namely, Pt, Pd, Ni, Co, and Mn has been designed. By simple room temperature electrodeposition, the designed catalyst is prepared and its hydrogen evolution reaction (HER) is explored and validated through experimental and theoretical approaches. The HEA demonstrated a superior HER activity with an overpotential of 22.6 mV at −10 mA cm−2 which outperforms Pt/C commercial catalyst. No evident degradation of the material is detected even after 100 hours of continuous operation under high current density. Moreover, the HEA has shown exceptional performance in harsh electrolyte conditions such as in simulated seawater and actual seawater. Remarkably, the density‐functional theory calculated Gibbs formation‐enthalpy is small (≈0 eV) compared to Pt/C placing the new HEA near the apex of Trasatti's model of Volcano plot, which is also suggestive of superior HER activity.
Precursor Engineering for the Electrode of Vanadium Redox Flow Batteries
Authors: Wang Shangkun , Jiang Yingqiao , Feng Zemin , Liu Yongguang , Jiang Long , Dai Lei , Zhu Jing , Wang Ling , He Zhangxing 
Published: December 2024

AbstractAs the demand for scalable electrochemical energy storage increases, vanadium redox flow batteries (VRFBs) offer multiple advantages due to their inherent safety, environmental friendliness, and power‐to‐capacity decoupling capability. However, the intrinsic structural limitations of the electrodes, coupled with deficiencies in their surface properties, significantly impede the practical implementation of VRFBs. The systematic optimization of electrodes through precursor engineering represents a forward‐thinking approach with significant potential for advancing the field. In this paper, recent advances in VRFB electrodes are comprehensively reviewed from the perspective of precursor engineering. To begin with, the advantages based on different types of precursors and processing methods are elucidated. Next, the focus is on the additive modification and design of electrodes through various precursor engineering strategies to optimize their structural and surface properties. Lastly, this review also discusses the current dilemmas faced by the four types of precursor engineering and explores future directions. It is hoped that this review will contribute to the further innovation and production application of VRFB electrode materials.
Enhanced Transformation Kinetics of Polysulfides Enabled by Synergistic Catalysis of Functional Graphitic Carbon Nitride for High‐Performance Li‐S Batteries
Authors: Chen Peng , Huang Tianyu , Wei Tianyu , Ding Bing , Dou Hui , Zhang Xiaogang 
Published: December 2024

AbstractThe introduction of an electrocatalyst to accelerate the kinetics of lithium polysulfides (LiPSs) reduction/oxidation is beneficial to enhance the capacity of sulfur cathode and inhibit the shuttling effect of LiPSs. However, current electrocatalysts mainly focus on the metal‐based active sites to reduce the reaction barriers, and there remains a great challenge in developing light‐weighted metal‐free catalysts. In this work, 1D graphitic carbon nitride nanorods (g‐C3N4‐NRs) with carboxyl (─COOH) and acylamide (─CONH2) functional groups are designed as metal‐free electrocatalysts for lithium‐sulfur batteries to accelerate the transport of Li+ and the conversion of LiPSs. The density functional theory (DFT) calculations prove that the existence of ─COOH group realizes the adsorption of LiPSs and accelerates the transport of Li+, while the ─CONH2 groups reduce the reaction energy barrier of S8 to Li2S. In addition, in situ UV–vis and Li2S nucleation/dissociation experiments also verify that g‐C3N4‐NRs achieve rapid adsorption and transformation of LiPSs under the synergistic action of ─COOH and ─CONH2 functional groups. Consequently, the sulfur cathode based on the g‐C3N4‐NRs‐PP separator remains at a specific capacity of 700.3 mAh g−1 after 70 cycles at 0.2 C, at 0 °C. This work provides a new strategy for breaking through the bottleneck of metal‐free catalysts for high‐performance lithium‐sulfur batteries.
Electro‐ and Photo‐ Dual Responsive Chromatic Devices for High‐Contrast Dimmers
Authors: Wang Bin , Liu Pengcheng , Zhao Feifei , Huang Bingkun , Zhang Wu , Elezzabi Abdulhakem Y. , Liu Linhua , Yu William W. , Li Haizeng 
Published: December 2024

AbstractElectrochromism stands out as a highly promising technology for applications including variable optical attenuators, optical switches, transparent displays, and dynamic windows. The pursuit of high‐contrast tunability in electrochromic devices remains a challenging goal. Here, the first photochromic hydrogel electrolyte is reported for electro‐ and photo‐dual responsive chromatic devices that yield a high transmittance contrast at 633 nm (ΔT = 83.1%), along with a tinted transmittance below 1.5%. Such high‐contrast devices not only hold great promise for dynamic windows but also enable seamless transitions between transparent augmented reality (AR) glass and opaque virtual reality (VR) glass. These findings introduce an innovative strategy for the design of high‐contrast dimmers, opening new avenues for the development of chromatic devices.
In Operando Locally‐Resolved Photophysics in Perovskite Solar Cells by Correlation Clustering Imaging
Authors: Louis Boris , Seth Sudipta , An Qingzhi , Ji Ran , Vaynzof Yana , Hofkens Johan , Scheblykin Ivan G. 
Published: December 2024

AbstractThe instability of metal halide perovskites limits the commercialization of solar cells despite their impressive efficiencies. This instability, driven by photo‐induced ion migration, leads to material restructuring, defect formation, degradation, and defect healing. However, these same “unwanted” properties enable to propose Correlation Clustering Imaging (CLIM), a technique that detects local photoluminescence (PL) fluctuations through wide‐field fluorescence microscopy. It is shown that such fluctuations are present in high‐quality perovskites and their corresponding solar cells. CLIM successfully visualizes the polycrystalline grain structure in perovskite films, closely matching electron microscopy images. The analysis of fluctuations reveals a dominant metastable defect responsible for the fluctuations. In solar cells in short‐circuit conditions, these fluctuations are significantly larger, and corresponding correlated regions extend up to 10 micrometers, compared to 2 micrometers in films. It is proposed that the regions resolved by CLIM in solar cells possess a common pool of charge extraction channels, which fluctuate and cause PL to vary. Since PL fluctuations reflect non‐radiative recombination processes, CLIM provides valuable insights into the structural and functional dynamics of carrier transport, ion migration, defect behavior, and recombination losses. CLIM offers a non‐invasive approach to understanding luminescent materials and devices in operando, utilizing contrasts based on previously untapped properties.
The Critical Isomerization Effect of Core Bromination on Nonfullerene Acceptors in Achieving High‐Performance Organic Solar Cells with Low Energy Loss
Authors: Liu Kerui , Jiang Yuanyuan , Liu Feng , Ran Guangliu , Wang Mengni , Wang Wenxuan , Zhang Wenkai , Wei Zhixiang , Hou Jianhui , Zhu Xiaozhang 
Published: December 2024

AbstractHighly efficient nonfullerene acceptors (NFAs) for organic solar cells (OSCs) with low energy loss (Eloss) and favorable morphology are critical for breaking the efficiency bottleneck and achieving commercial applications of OSCs. In this work, quinoxaline‐based NFAs are designed and synthesized using a synergistic isomerization and bromination approach. The π‐expanded quinoxaline‐fused core exhibits different bromination sites for isomeric NFAs, namely AQx‐21 and AQx‐22. Theoretical and experimental analyses reveal that the isomerization effect of core bromination significantly influences molecular intrinsic properties, including electrostatic potentials, polarizability, dielectric constant, exciton binding energy, crystallinity, and miscibility with donor materials, thereby improving molecular packing and bulk‐heterojunction morphology. Consequently, the AQx‐22‐based blend exhibits enhanced crystallinity, reduced domain size, and optimized phase distribution, which facilitates charge transport, suppresses charge recombination, and improves charge extraction. The AQx‐22‐treated OSCs obtain an impressive efficiency of 19.5% with a remarkable open‐circuit voltage of 0.970 V and a low Eloss of 0.476 eV. This study provides deep insights into NFA design and elucidates the potential working mechanisms for optimizing morphology and device performance through isomerization engineering of core bromination, highlighting its significance in advancing OSC technology.
Large Dipole Moment Enhanced CO2 Adsorption on Copper Surface: Achieving 68.9% Catalytic Ethylene Faradaic Efficiency at 1.0 A cm−2
Authors: Lu Chenbao , He Qichuan , Huang Senhe , Shi Pengfei , Yang Chongqing , Zhang Jichao , Zhu Jinhui , Zhang Juan , Wang Tianfu , Zhuang Xiaodong 
Published: December 2024

AbstractThe electrochemical conversion of carbon dioxide (CO2) into hydrocarbon products emerges as a pivotal sustainable strategy for carbon utilization. Cu‐based catalysts are currently prioritized as the most effective means for this process, yet it remains a long‐term goal to achieve high product selectivity at elevated current densities. This study delved into exploring the influence of a topological poly(2‐aminoazulene) with a substantial dipole moment on modulating the Cu surface dipole field to augment the catalytic activity involved in CO2 reduction. The resulting Cu/poly(2‐aminoazulene) heterojunction showcases a remarkable ethylene Faradaic efficiency of 68.9% even at a substantial current density of 1 A cm−2. Through in situ Raman and in situ Fourier‐transform infrared spectroscopy, poly(2‐aminoazulene)‐modified Cu electrode exhibits a heightened concentration of intermediates as compared to the bare Cu, proving advantageous for C−C dimerization. Theoretical calculations demonstrate the reduced energy barrier for C−C dimerization, and meanwhile impeding hydrogen evolution reaction on Cu/poly(2‐aminoazulene) heterojunction, which are beneficial to CO2 reduction. The catalyst design in this study, incorporating dipole moment considerations, not only investigates the influence of dipole moment on electrochemical carbon dioxide reduction but also pioneers an innovative strategy to augment catalytic activity by elevating the micro‐concentration of reactants on catalyst surfaces.
D2HGDH Deficiency Regulates Seizures through GSH/Prdx6/ROS‐Mediated Excitatory Synaptic Activity
Authors: Zhang Zhijuan , Zhang Hui , Zhang Peng , Li Rong , Zhou Jinyu , Li Jiyuan , Hu Danmei , Huang Rui , Tang Fenglin , Liu Jie , Xu Demei , Zhang Chenlu , Tian Xin , Ma Yuanlin , Kwan Patrick 
Published: December 2024

AbstractCurrent antiepileptic drugs are ineffective in one‐third of patients with epilepsy; however, identification of genes involved in epilepsy can enable a precision medicine approach. Here, it is demonstrated that downregulating D‐2‐hydroxyglutarate dehydrogenase (D2HGDH) enhances susceptibility to epilepsy. Furthermore, its potential involvement in the seizure network through synaptic function modulation is investigated. D2HGDH knockdown reduces the glutathione reduced (GSH)/glutathione oxidized (GSSG) ratio and elevates reactive oxygen species (ROS) levels within neurons. Oxidative stress may play a crucial role in the pathogenesis of epilepsy. The specific contribution of each pathway varies among patients, highlighting the complexity of this disease. In this study, downregulation of D2HGDH affects modulation of ROS levels, synaptic transmission, and seizure susceptibility. Furthermore, the acid calcium‐independent phospholipase A2 (aiPLA2) inhibitor, MJ33, restores the GSH/GSSG balance and reverses the increase in ROS levels caused by D2HGDH knockdown, resulting in remission of epilepsy‐related behaviors. The results demonstrate that downregulation of D2HGDH affects synaptic function by regulating ROS production. These findings support the use of targeted gene therapy as a potential alternative to antioxidant‐based treatments for refractory epilepsy.
Inhibition of Endoplasmic Reticulum Stress Cooperates with SLC7A11 to Promote Disulfidptosis and Suppress Tumor Growth upon Glucose Limitation
Authors: Wang Jin , Chen Jing , Fan Kexin , Wang Minglin , Gao Min , Ren Yakun , Wu Shaobo , He Qian , Tu Kangsheng , Xu Qiuran , Zhang Yilei 
Published: December 2024

AbstractDisulfidptosis is a newly discovered type of regulated cell death triggered by disulfide bond accumulation and NADPH (nicotinamide adenine dinucleotide phosphate) depletion due to glucose deprivation. However, the regulatory mechanisms involving additional cellular circuits remain unclear. Excessive disulfide bond accumulation can impair endoplasmic reticulum (ER) homeostasis and activate the ER stress response. In this study, we found that SLC7A11‐mediated disulfidptosis upon glucose deprivation is accompanied by ER stress induction. Pharmacological inhibition of SLC7A11‐mediated cystine uptake or cystine withdrawal not only blocks disulfidptosis under glucose starvation but also suppresses the ER stress response, indicating a close link between these processes. Moreover, inhibitors targeting the ER stress response promote disulfidptosis, while ER stress inducers suppress glucose starvation‐induced disulfidptosis in SLC7A11‐high‐expressing cells, suggesting a protective role for ER stress during disulfidptosis. Similar effects are observed in cells treated with glucose transporter inhibitors (GLUTi). Finally, combined treatment with ER stress inhibitors and GLUTi significantly suppresses tumor growth both in vitro and in vivo by inducing disulfide stress and subsequent disulfidptosis. In summary, these findings reveal a novel role for ER stress in regulating disulfidptosis and provide theoretical insights into the potential application of GLUTi and ER stress inhibitors in cancer therapy.
Tertiary Lymphoid Structures are Linked to Enhanced Antitumor Immunity and Better Prognosis in Muscle‐Invasive Bladder Cancer
Authors: Lin Jiaxing , Jiang Shan , Chen Baoqiang , Du Yiqing , Qin Caipeng , Song Yuxuan , Peng Yun , Ding Mengting , Wu Jilin , Lin Yihan , Xu Tao 
Published: December 2024

AbstractThe prognosis for muscle‐invasive bladder cancer (MIBC) remains poor, and reliable prognostic markers have yet to be identified. Tertiary lymphoid structures (TLS) have been associated with favorable outcomes in certain cancers. However, the relationship between TLS and MIBC remains unclear. A multi‐omics approach is utilized, leveraging single‐cell RNA sequencing, spatial transcriptomics, bulk RNA sequencing, and immunohistochemistry, to investigate the roles of B cells and TLS in MIBC. These findings indicate that elevated levels of B cells and TLS correlate with improved prognoses in patients with MIBC, aligning with the robust antitumor immune responses observed in the TLS region. From a mechanistic perspective, CXCL13 serves as a critical cytokine for TLS formation in MIBC, primarily secreted by clonally expanded CXCL13+ T cells. This cytokine interacts with the CXCR5 receptor on NR4A2+ B cells, promoting TLS development. Plasma cells arising within the TLS microenvironment predominantly produce the IGHG antibody, potentially enhancing the phagocytic capabilities of C1QC+ macrophages. From an application standpoint, a TLS‐specific gene signature is developed that effectively predicts outcomes in MIBC and other cancers. This study highlights the prognostic potential of TLS in MIBC and reveals immune mechanisms, offering insights for personalized treatment strategies.
Targeted CRISPR/Cas9 Lipid Nanoparticles Elicits Therapeutic Genome Editing in Head and Neck Cancer
Authors: Masarwy Razan , Breier Dor , Stotsky‐Oterin Lior , Ad‐El Nitay , Qassem Shahd , Naidu Gonna Somu , Aitha Anjaiah , Ezra Assaf , Goldsmith Meir , Hazan‐Halevy Inbal , Peer Dan 
Published: December 2024

AbstractSquamous cell carcinomas of the head and neck (HNSCC) originate in the upper aerodigestive tract, including the oral cavity, pharynx, and larynx. Current treatments of locally advanced HNSCC often lead to high treatment failure, and disease recurrence, resulting in poor survival rates. Advances in mRNA technologies and lipid nanoparticle (LNP) delivery systems led to several clinical trials involving LNP‐CRISPR‐Cas9 mRNA‐based therapeutics. Despite these advances, achieving cell‐type‐specific extrahepatic mRNA delivery is still challenging. This study introduces a safe and effective intratumoral EGFR‐targeted CRISPR‐LNP delivery strategy for knocking out SOX2, which is a cancer‐specific gene. To assess their therapeutic potential, it is shown that LNPs made from ionizable lipids with helper lipids co‐encapsulating Cas9 mRNA and sgRNA targeting SOX2 (sgSOX2), lead to a ≈60% reduction in HNSCC cell viability in vitro. Next, using a xenograft HNSCC mouse model, targeted delivery of 𝜶EGFR‐ CRISPR‐sgSOX2‐LNPs to HNSCC cells resulted in a 90% inhibition of tumor growth and a 90% increase in survival for > 84 days, with tumor disappearance observed in 50% of the mice. These findings emphasize the potential of targeted mRNA‐Cas9‐LNPs in clinically accessible solid tumors, specifically in reaching tumor cells and inducing persistent therapeutic responses in tumors with high‐recurrence rates like HNSCC.
Rare‐Earth Substitution Induced Symmetry Breaking for The First Sc‐Based Nonlinear Optical Chalcogenide with High‐Performance
Authors: Zhao Chen‐Yi , Hu Chun‐Li , Suen Nian‐Tzu , Li Xiao‐Hui , Xu Hai‐Ping , Zhou Wenfeng , Guo Sheng‐Ping 
Published: December 2024

AbstractChalcogenides are the most important infrared nonlinear optical (NLO) material candidates, and the exploration of high‐performance ones is attractive and challengeable. Hitherto, there is no NLO scandium (Sc) chalcogenides experimentally studied. Here, new quaternary Sc thiophosphate CsScP2S7 (CSPS) was synthesized by the facile metal oxide‐boron‐sulfur/reactive flux hybrid solid‐state method. It crystallizes in the monoclinic chiral space group C2, and the layered structure is composed by the new ScP2S11 functional motifs built by ScS6 octahedra and P2S7 dimers, and the structure‐performance analysis reveals that the hyperpolarizability of ScP2S11 is much greater than the assembled units (ScS6 and PS4), which makes the first NLO Sc chalcogenide CSPS exhibits strong NLO response (0.8 × AGS) and high laser‐induced damage threshold (LIDT) (4.3 × AGS), and a wide bandgap of 3.10 eV. With the coordination number's reduction of rare‐earth (RE) ion and the rearrangement of P2S7 dimers, the centrosymmetric structure of CsREP2S7 family can be broken via substitution with the smallest RE element Sc to form the noncentrosymmetric structure. This work not only discovers a new high‐performance infrared NLO material, but also will inspire researchers to explore more potential NLO Sc chalcogenides.