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International Conference on Information science and Control Engineering (ICISCE)

作者： Chenyang Wang Wen He Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design Centre Wuhan China

A transient response enhancement circuit applied in peak-current mode converter is proposed, which can improve the system transient response. Because the bandwidth of the traditional peak-current mode Boost converter is limited by the right half plane zero, the transient response speed is limited during the load step. A circuit is proposed which can adaptively adjust the output voltage of the Boost converter and optimized the system transient response. The proposed circuit is simulated and verified by 0.18um BCD process. The recovery time was reduced from 67$\mu$s to 49$\mu$s while the load current changed from 1A to 200mA. The recovery time was reduced from 47$\mu$s to 35$\mu$s while the load current changed from 200mA to 1A.

关键词： Transient response Information science Control engineering Simulation Bandwidth Transient analysis Integrated circuit modeling

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design of photocurable 3D printed composite hydrogel scaffolds for osteochondral repair

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Polymer 2025年 333卷

作者： Chengdong Zhen Fuyu Chen Heng Li Guimei Lin Fei Wang Bingtao Tang Yanbin Shi Xuelin Li School of Mechanical Engineering Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 China Shandong Institute of Mechanical Design and Research Jinan 250031 China School of Pharmaceutical Science Shandong University Jinan 250012 China NMPA Key Laboratory for Technology Research and Evaluation of Drug Products Jinan 250012 China School of Arts and Design Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 China

Current osteochondral repair strategies (e.g., autologous transplantation, microfracture) face challenges in balancing mechanical support with bioactive microenvironment construction, as the resulting fibrocartilage fails to sustain long-term joint functionality. Although hydrogel scaffolds have garnered significant attention as promising alternatives due to their cartilage-mimetic properties, critical bottlenecks such as insufficient mechanical strength, conflicting porosity-permeability trade-offs, and the absence of multiscale mechano-biological coupling design methodologies continue to hinder clinical translation. This study proposes a novel bioinspired gradient photocurable 3D-printed composite scaffold design strategy. By synergistically optimizing methacrylated gelatin (GelMA) and poly(ethylene glycol) diacrylate (PEGDA) at a cross-scale ratio (5 wt% GelMA + 10 wt% PEGDA) and implementing a hierarchical composite architecture with externally supportive units and internally permeable units, we achieved concurrent enhancements in compressive strength (5.42 kPa), permeability (12.63 × 10−9 m2), and biomicroenvironment adaptability. Through digital light processing (DLP)-based 3D printing, fluid dynamics simulations, and in vitro experiments, composite scaffold b demonstrated a 2.15-fold increase in compressive strength over homogeneous scaffold a, a 3.6-fold and 2.07-fold permeability improvement compared to support-dense homogeneous scaffolds b and c, respectively, and >95 % viability in co-cultured rabbit bone marrow mesenchymal stem cells. This stratified design decouples the mechanical reinforcement function of rigid outer units from the directional nutrient transport capacity of the porous core, effectively overcoming the "zero-sum" conflict between mechanical robustness and metabolic exchange in conventional homogeneous scaffolds. This work establishes a design paradigm for osteochondral repair scaffolds that integrates mechanical adaptability, biofunction

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GDSL esterase/lipases OsGELP34 and OsGELP110/OsGELP115 are essential for rice pollen development

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Journal of Integrative Plant Biology 2020年第10期62卷 1574-1593页

作者： Huihui Zhang Menglong Wang Yiqi Li Wei Yan Zhenyi Chang Haoling Ni Zhufeng Chen Jianxin Wu Chunjue Xu Xing Wang Deng Xiaoyan Tang Guangdong Provincial Key Laboratory of Biotechnology for Plant Development School of Life SciencesSouth China Normal UniversityGuangzhou 510631China Shenzhen Institute of Molecular Crop Design Shenzhen 518107China School of Life Sciences Capital Normal UniversityBeijing 100048China School of Life Sciences Southern University of Science and TechnologyShenzhen 518055China

Pollen exine contains complex biopolymers of aliphatic lipids and *** development of pollen exine often leads to plant *** mechanisms regulating exine formation have been studied extensively but remain *** we report the analyses of three GDSL esterase/lipase protein genes,OsGELP34,OsGELP110,and OsGELP115,for rice exine ***34 was identified by cloning of a male sterile mutant ***34 encodes an endoplasmic reticulum protein and was mainly expressed in anthers during pollen exine ***34 mutant displayed abnormal exine and altered expression of a number of key genes required for pollen ***110 was previously identified as a gene differentially expressed in meiotic ***110 was most homologous to OsGELP115,and the two genes showed similar gene expression *** OsGELP110 and OsGELP115 proteins were localized in *** knockout of OsGELP110 and OsGELP115 did not affect the plant fertility,but double knockout of both genes altered the exine structure and rendered the plant male ***34 is distant from OsGELP110 and OsGELP115 in sequence,and osgelp34 and osgelp110/osgelp115 mutants were different in anther morphology despite both were male *** results suggested that OsGELP34 and OsGELP110/OsGELP115 catalyze different compounds for pollen exine development.

关键词： development. sterile render

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Unraveling equilibrium effect between traffic supply and land use in transit-oriented development

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Frontiers of Architectural Research 2025年

作者： Liu, Fang Zhou, Jiahao Geng, Hao Zhu, Yanmei Ma, Yuanhong Li, Shuyang School of Architecture and Urban Planning Shenzhen University Shenzhen518060 China Faculty of Humanities and Arts Macau University of Science and Technology Macau 999078 China Meng Design Research Centre Shenzhen518060 China State Key Laboratory of Subtropical Building Science South China University of Technology Guangzhou510640 China

The Node-Place model is a classic tool in Transit-Oriented Development (TOD) typologies that it illustrates the synergistic equilibrium between traffic supply (Node) and land use (Place). However, practical applications often face limitations that can shift this relationship from the ideal 1:1 equilibrium. During the regulatory detailed planning stage, while we determine the Node-Place equilibrium relationship that effectively confirms the anticipated people activity density, we also ensure it aligns with varied development strategies and enables efficient identification of total proportion and thresholds for both traffic supply and land use. Our analysis identified that the Node-Place equilibrium coefficient for TOD subway station areas in Shenzhen, China's highest construction density zone registered at 1.596. Building on this finding, we further developed a method for differentiating between TOD and DOT samples. Regression analysis indicates that the NP model is not appropriate for analyzing DOT station areas. Accordingly, this study proposes a simplified method to enhance the applicability of the NP model in planning decisions, and this method helps avoid the issues associated with incorporating a third dimension and the interpretive challenges of typologies arising from the application of clustering methods to extended NP models. © 2025 The Author(s)

关键词： Traffic control

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Anomalous Polarization-Switching Phenomena and Noteworthy Pyroelectricity in Ferroelectric Hf0.5zr0.5o2 Polycrystalline Films

SSRN

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SSRN 2023年

作者： Wang, Xudong Zhou, Yong Xiong, Ke Wu, Shuyu Tu, Luqi Chen, Yan Wu, Shuaiqin Zeng, Jinhua Zheng, Yuqing Gu, Shiqun Luo, Man Lin, Tie Shen, Hong Meng, Xiangjian Liu, Qi Chu, Junhao Wang, Jianlu State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai200083 China Key Laboratory of Microelectronics Device and Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing100029 China Frontier Institute of Chip and System Fudan University Shanghai200433 China Shanghai Frontier Base of Intelligent Optoelectronics and Perception Institute of Optoelectronics Fudan University Shanghai200433 China Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Chinese Academy of Sciences Hangzhou330106 China BirenTech Shanghai201114 China Jiangsu Key Laboratory of ASIC Design School of Information Science and Technology Nantong University Jiangsu Nantong226019 China

Hafnia-based oxide thin films exhibit unconventional robust ferroelectricity at the nanoscale, paving the way for advancements in next-generation nanoelectronics. However, the stability and dynamics of ferroelectric polarization in hafnia-based oxides films, particularly at the nanoscale, warrant further exploration. In this study, we delve into the factors influencing the formation of the ferroelectric phase. Our findings illuminate that the confinement effect of the capped layer enhances the stabilization of the metastable orthorhombic phase, thereby bolstering its ferroelectricity and endurance. Furthermore, we identify an unprecedented polarization-switching behavior in HfO2-based ferroelectric films, characterized by a decrease in the remanent polarization and an increase in the coercive field as the temperature drops. This peculiar phenomenon can be ascribed to the reduction in the long-range interaction of polarization dipoles upon cooling, as evidenced by the dielectric spectrum. The diminished long-range interaction results in the emergence of nanodomains and a re-entrant relaxer behavior, offering novel insights into the origin of ferroelectricity and the stability of ferroelectric polarization in hafnia-based thin films. Given the commendable compatibility of Hf0.5Zr0.5O2 films with Si substrates and a pyroelectric coefficient of -62.1 μC/m2·K, they emerge as a prime candidate for sensor device applications. © 2023, The Authors. All rights reserved.

关键词： Thin films

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A Transparent Broadband Absorbing Metamaterial Based on ITO Structure

A Transparent Broadband Absorbing Metamaterial Based on ITO ...

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IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications (IMWS-AMP)

作者： Jingxian Yang Long Xiao Junfeng Chen China Ship Development and Design Center Science and Technology on Electromagnetic Compatibility Laboratory Wuhan China

ISBN: (数字)9781728160641

ISBN: (纸本)9781728160658

Aiming at some specific application scenarios, this paper proposes a broadband transparent absorbing metamaterial using transparent quartz glass and indium tin oxide (ITO) material. The transparent absorbing metamaterial is composed of a three-layer structure with the thickness of 4.2mm overall. The absorption of the transparent metamaterial reaches 90% in the frequency range from 6.2GHz to 19.3GHz, and it has good polarization insensitivity and wide-incident-angle stability. This structure can be used in electromagnetic shielding scenes for the purpose of light transmission.

关键词： Metamaterials Indium tin oxide Broadband communication Microwave circuits Microwave photonics Glass Magnetic materials

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Understanding diurnal variability in organic matter processing by microalgal-bacterial granular sludge in lake water remediation

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Bioresource technology 2025年 433卷 132717页

作者： Chen, Changqing Shi, Yuting Chen, Bingheng Li, Anjie Meng, Quan Jiang, Yu Ji, Bin Department of Water and Wastewater Engineering School of Urban Construction Wuhan University of Science and Technology Wuhan430065 China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources School of Resource and Environmental Engineering Wuhan University of Science and Technology Wuhan430065 China Key Laboratory of Water and Sediment Sciences of Ministry of Education State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China School of Art and Design Wuhan University of Science and Technology Wuhan430065 China School of Civil Engineering and Architecture Wuhan University of Technology Wuhan430070 China

This study investigates the diurnal variability of organic matter removal by microalgal-bacterial granular sludge (MBGS) in lake water remediation. Results showed that daytime removal efficiencies for NH4+-N, NO3−-N, NO2−-N, TN, and TP reached 72.1%, 73.2%, 91.5%, 60.5%, and 52.8%, respectively, exceeding nighttime values of 52.7%, 55.8%, 88.4%, 37.9%, and 39.9%. However, chemical oxygen demand (COD) exhibited a net release during daytime, contrasting with removal during night conditions. Significant microbial community shifts, notably increased Bacteroidota abundance, were driven by fluctuations in dissolved oxygen and organic carbon levels. Additionally, the upregulation of fatty acid metabolism-related genes like paaF and ACSL provided mechanistic support COD removal efficiency. These findings suggest that optimizing MBGS operation through diurnal parameter regulation can enhance lake restoration efficacy and provide a theoretical foundation for developing sustainable engineering strategies in aquatic ecosystem management. © 2025 Elsevier Ltd

关键词： Diurnal variability Lake water remediation Microalgal-bacterial symbiosis Microbial community dynamics Organic matter processing

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Analysis on Stability of Three-loop Autopilot with An Acceleration Feedback Augmentation Loop

Analysis on Stability of Three-loop Autopilot with An Accele...

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第40届中国控制会议

作者： Hui Wang Tao Li Daoguang Tang Junfang Fan Yifang Yuan Luyao Zang Wugang Wang Chunyan Xiao School of Aerospace Engineering Beijing Institute of Technology Beijing Key Laboratory of UAV Autonomous Control Beijing Institute of Technology School of Electrical and Control Engineering North University of China Beijing Key Laboratory of High-Dynamic Navigation Technology Beijing Information Science and Technology University China PLA 63961 Unit Beijing System Design Institute of Electro-Mechanic Engineering Northwest Industries Group CO. Ltd.

In order to construct a stable augmentation loop, a novel three-loop autopilot structure with an acceleration feedback is proposed. Based on LQR and analytical methods, the design process of the controller parameters is deduced. For a static unstable missile, the control characteristics of a three-loop autopilot with acceleration feedback are compared with classical three-loop and pseudo-angle-of-attack feedback three-loop autopilots. It is pointed out that the closed-loop gain of the three-loop autopilot with acceleration signal feedback is 1, which is not affected by the control parameters. The autopilot can control the static unstable missile, and the acceleration signal is easier to obtain than the pseudo-angle-of-attack.

关键词： Acceleration feedback Stable augmentation loop Autopilot Static unstable missile

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Dual-Polarization Second-Order Photonic Topological Insulators

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Physical Review Applied 2021年第3期15卷 034053-034053页

作者： Yafeng Chen Fei Meng Zhihao Lan Baohua Jia Xiaodong Huang Key Laboratory of Advanced Technology for Vehicle Body Design and Manufacture Hunan University Changsha 410082 China Department of Mechanical Engineering Hong Kong Polytechnic University Hong Kong SAR China Faculty of Science Engineering and Technology Swinburne University of Technology Hawthorn Victoria 3122 Australia Department of Electronic and Electrical Engineering University College London Torrington Place London WC1E 7JE United Kingdom

Second-order photonic topological insulators that host highly localized corner states resilient to defects, are opening alternative routes towards developing fascinating photonic devices. However, the existing works on second-order photonic topological insulators have mainly focused on either transverse-magnetic or transverse-electric modes. In this paper, we propose a dual-polarization topological photonic crystal structure for both transverse magnetic and transverse electric modes through topology optimization. Simple tight-binding lattice models are constructed to reveal the topological features of the optimized photonic crystal structure in a transparent way. The optimized dual-polarization second-order photonic topological insulator hosts four groups of corner states with different profiles and eigenfrequencies for both the transverse-magnetic and transverse-electric modes. Moreover, the robustness of these corner states against defects is explicitly demonstrated. Our results offer opportunities for developing polarization-independent topological photonic devices.

关键词： Photonic crystals Polarization of light Symmetry protected topological states Topological effects in photonic systems Dielectrics Topological materials Finite-element method Tight-binding model

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Intrinsic Nonlinear Spin Magnetoelectricity in Centrosymmetric Magnets

arXiv

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arXiv 2022年

作者： Xiao, Cong Liu, Huiying Wu, Weikang Wang, Hui Niu, Qian Yang, Shengyuan A. Department of Physics The University of Hong Kong Hong Kong HKU-UCAS Joint Institute of Theoretical and Computational Physics Hong Kong Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore487372 Singapore Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore School of Physics University of Science and Technology of China Anhui Hefei230026 China

We propose an intrinsic nonlinear spin magnetoelectric effect in magnetic materials, offering the potential of all-electric control of spin degree of freedom in centrosymmetric magnets, which reside outside of the current paradigm based on linear spin response. We reveal the band geometric origin of this effect in the momentum and magnetization space Berry connection polarizabilities, and clarify its symmetry characters. As an intrinsic effect, it is determined solely by the material's band structure and represents a material characteristic. Combining our theory with first-principles calculations, we predict sizable nonlinear spin magnetoelectricity in single-layer MnBi2Te4, which can be detected in experiment. Our theory paves the way for exploring rich nonlinear spintronic effects and novel device concepts based on them. © 2022, CC BY.

关键词： Magnets

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