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震灾防御技术 2012年第4期7卷 397-403页

作者：孟紫阳郭明珠赵慧乾机械工业第六设计研究院有限公司郑州450007 北京工业大学建筑工程学院北京100124

将保定市42栋典型多层砖混结构分别按照年代、用途、层数分类,采用结构易损性方法进行震害预测分析,得出各自震害矩阵,并以平均抗震能力指数评价其抗震能力。分析结论可为保定市多层砖混群体震害预测提供参考。

关键词：多层砖混结构易损性震害预测抗震能力指数

Exploration of Gas-Dependent Self-Adaptive Reconstruction Behavior of Cu₂O for Electrochemical CO₂ Conversion to Multi-Carbon Products

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NANO-MICRO LETTERS 2025年第1期17卷 1-17页

作者： Zhang, Chaoran Gu, Yichuan Jiang, Qu Sheng, ziyang Feng, Ruohan Wang, Sihong Zhang, Haoyue Xu, Qianqing Yuan, Zijian Song, Fang Shanghai Jiao Tong Univ Sch Mat Sci & Engn State Key Lab Met Matrix Composites Shanghai 200240 Peoples R China

Structural reconstruction of electrocatalysts plays a pivotal role in catalytic performances for CO2 reduction reaction (CO2RR), whereas the behavior is by far superficially understood. Here, we report that CO2 accessibility results in a universal self-adaptive structural reconstruction from Cu2O to Cu@CuxO composites, ending with feeding gas-dependent microstructures and catalytic performances. The CO2-rich atmosphere favors reconstruction for CO2RR, whereas the CO2-deficient one prefers that for hydrogen evolution reaction. With the assistance of spectroscopic analysis and theoretical calculations, we uncover a CO2-induced passivation behavior by identifying a reduction-resistant but catalytic active Cu(I)-rich amorphous layer stabilized by *CO intermediates. Additionally, we find extra CO production is indispensable for the robust production of C2H4. An inverse correlation between durability and FECO/FEC2H4 is disclosed, suggesting that the self-stabilization process involving the absorption of *CO intermediates on Cu(I) sites is essential for durable electrolysis. Guided by this insight, we design hollow Cu2O nanospheres for durable and selective CO2RR electrolysis in producing C2H4. Our work recognizes the previously overlooked passivation reconstruction and self-stabilizing behavior and highlights the critical role of the local atmosphere in modulating reconstruction and catalytic processes.

关键词： CO2 reduction reaction Electrocatalysts Cu2O Reconstruction Self-adaptive electrocatalysis

Optimal Preview Control for Automatic Carrier Landing System of Carrier-Based Aircraft with Air Wake

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第6期34卷 659-668页

作者： Li meng Zhen ziyang Gong Huajun Hou Min Huang Shuhong College of Automation Engineering Naniing University of Aeronautics and AstronauticsNanjing 211106P.R.China

Carrier-based aircraft carrier landing is a special kind of tracking control problem and not suitable for classical control methods,which may miss the desired performance or result in ***,we present an optimal preview control for automatic carrier landing system(ACLS)by using state information of system,as well as future reference information,which can avoid the shortcomings of classical control *** the flight performance of carrier-based aircraft is disturbed by air wake when the aircraft flies near the area of carrier stern,we design a disturbance rejection strategy to ensure that aircraft track the glide path with high precision and ***,carrier-based aircraft is a complex nonlinear ***,the nonlinear model of carrier-based aircraft can be linearized at equilibrium landing state and decoupled into the longitudinal model and the lateral ***,an optimal preview control system is *** simulation results of a carrier-based aircraft show that the optimal preview control system can effectively suppress air *** accuracy of optimal preview controller is higher than that of the proportional integral differential(PID)control system.

关键词： carrier-based aircraft carrier landing optimal control preview control nonlinear model

A Direct Route to Tetrahydropyridazine Derivatives via DMAP-Catalyzed [4+2] Annulation of Allenoates with Arylazosulfones

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Chinese Journal of Chemistry 2023年第22期41卷 3031-3036,I0002页

作者： Xin Ji ziyang Li Jinfeng Zhang Yicheng Zhang Ling-Guo meng Key Laboratory of Green and Precise Synthetic Chemistry and Applications Ministry of EducationSchool of Chemistry and Materials ScienceHuaibei Normal UniversityHuaibeiAnhui 235000China

Herein,a DMAP-catalyzed[4+2]annulation ofα-substituted allenoates with arylazosulfones is reported,which affords facile access to tetrahydropyridazine derivative in synthetically useful *** reaction features mild conditions and good functional group ***,the resultant products can be readily transformed into pyridazin-3-one derivatives in the presence of DDQ.

关键词： DMAP [4+2]Cycloaddition Tetrahydropyridazihe derivatives Pyridazin-3-one derivatives Allenes Zwitterions N-Heterocycles

Efficient subtree results computation for XML keyword queries

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Frontiers of Computer Science 2015年第2期9卷 253-264页

作者： ziyang CHEN School of Information Science and Engineering Yanshan University Hebei 066004 China Environmental Management College of China Hebei 066004 China The Key Laboratory for Computer Virtual Technology and System Integration of HeBei Province Yanshan University Hebei 066004 China

In this paper, we focus on efficient construction of restricted subtree （RSubtree） results for XML keyword queries on a multicore system. We firstly show that the perfor- mance bottlenecks for existing methods lie in 1） computing the set of relevant keyword nodes （RKNs） for each subtree root node, 2） constructing the corresponding RSubtree, and 3） parallel execution. We then propose a two-step generic top-down subtree construction algorithm, which computes SLCA/ELCA nodes in the first step, and parallelly gets RKNs and generates RSubtree results in the second step, where generic means that 1） our method can be used to compute dif- ferent kinds of subtree results, 2） our method is independent of the query semantics; top-down means that our method con- structs each RSubtree by visiting nodes of the subtree con- structed based on an RKN set level-by-level from left to right, such that to avoid visiting as many useless nodes as possible. The experimental results show that our method is much more efficient than existing ones according to various metrics.

关键词： XML SLCA/ELCA RSubtree RKNs parallel

A comprehensive analysis of DAC-SDC FPGA low power object detection challenge

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Science China(Information Sciences) 2024年第8期67卷 300-320页

作者： Jingwei ZHANG Guoqing LI meng ZHANG Xinye CAO Yu ZHANG Xiang LI ziyang CHEN Jun YANG School of Electronics Science and Engineering Southeast University

The lower power object detection challenge(LPODC) at the IEEE/ACM Design Automation Conference is a premier contest in low-power object detection and algorithm(software)-hardware co-design for edge artificial intelligence, which has been a success in the past five years. LPODC focused on designing and implementing novel algorithms on the edge platform for object detection in images taken from unmanned aerial vehicles(UAVs), which attracted hundreds of teams from dozens of countries to participate. Our team SEUer has been participating in this competition for three consecutive years from 2020 to 2022 and obtained sixth place respectively in 2020 and 2021. Recently, we achieved the championship in 2022. In this paper, we presented the LPODC for UAV object detection from 2018 to 2022, including the dataset, hardware platform,and evaluation method. In addition, we also introduced and discussed the details of methods proposed by each year's top three teams from 2018 to 2022 in terms of network, accuracy, quantization method, hardware performance, and total score. Additionally, we conducted an in-depth analysis of the selected entries and results, along with summarizing representative methodologies. This analysis serves as a valuable practical resource for researchers and engineers in deploying the UAV application on edge platforms and enhancing its feasibility and reliability. According to the analysis and discussion, it becomes evident that the adoption of a hardware-algorithm co-design approach is paramount in the context of tiny machine learning(TinyML).This approach surpasses the mere optimization of software and hardware as separate entities, proving to be essential for achieving optimal performance and efficiency in TinyML applications.

关键词： tiny machine learning object detection convolutional neural networks algorithm-hardware co-design low power field programmable gate array

Beyond natural targets: chemical synthesis reprograms the target specificity of rapamycin

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National Science Review 2022年第11期9卷 8-9页

作者： ziyang Zhang Department of Cellular and Molecular Pharmacology University of California

Natural products have served as a rich source of new drugs, either directly or as inspirations for pharmacophores [1].Under the constant pressure of evolution,natural products have exploited numerous biosynthetic mach...

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Simulations of electron zebra stripes in the inner radiation belt using a composite empirical electric field model

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Science China Earth Sciences 2025年第1期 27-38页

作者： ziyang WANG Ying LIU Qiugang ZONG Hong ZOU Yuguang YE Xuzhi ZHOU Chao YUE Shan WANG Institute of Space Physics and Applied Technology Peking University State Key Laboratory of Lunar and Planetary Science Macau University of Science and Technology

The phenomenon termed “zebra stripes” manifests as regular patterns in the energy-space(L shell) spectrum of energetic electrons(ranging from tens to hundreds ke V) within the inner radiation belt. These structures exhibit drift-periodic behavior and commonly arise from large-scale electric field perturbations near the substorm onsets. In this study, we introduce a composite electric field model and replicate the formation, structure, and evolution of zebra stripes using a bounce-averaged test particle code under this electric field model. High-resolution measurements of energetic electrons obtained from the Van Allen Probes and the recently launched Macao Science Satellites-1 are used as initial conditions and served to validate our test particle simulations. Comparative analyses between observed data and simulations demonstrate our test particle method's efficacy in capturing zebra stripes' general behavior. Moreover, the composite model proves capable of reproducing realistic variations in the electric field within the inner radiation belt to a certain extent. Nevertheless, subtle differences emerge in the flux strength and the positions of stripes. These disparities primarily stem from limitations inherent in the electric field model and the initial conditions of the simulation. Acknowledging that the model represents an average case, it is conceivable that real-world scenarios may deviate from the average, thereby introducing variations in the observed phenomena.

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Ensemble deep transfer learning driven by multisensor signals for the fault diagnosis of bevel-gear cross-operation conditions

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Science China(Technological Sciences) 2021年第3期64卷 481-492页

作者： DI ziyang SHAO HaiDong XIANG JiaWei State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082China College of Mechanical and Electrical Engineering Wenzhou UniversityWenzhou 325035China

The existing intelligent fault diagnosis techniques of bevel gear focus on single-sensor signal analysis under the steady operation *** this study,a new method is proposed based on ensemble deep transfer learning and multisensor signals to enhance the fault diagnosis adaptability and reliability of bevel gear under various operation ***,a novel stacked autoencoder(NSAE)is constructed using a denoising autoencoder,batch normalization,and the Swish activation ***,a series of source-domain NSAEs with multisensor vibration signals is ***,the good model parameters provided by the source-domain NSAEs are transferred to initialize the corresponding target-domain ***,a modified voting fusion strategy is designed to obtain a comprehensive *** multisensor signals collected under the different operation conditions of bevel gear are used to verify the proposed *** comparison results show that the proposed method can diagnose different faults in an accurate and stable manner using only one target-domain sample,thereby outperforming the existing methods.

关键词： ensemble deep transfer learning bevel-gear fault diagnosis novel stacked autoencoder multisensor signals modified voting fusion strategy

Bioaerosol emissions variations in large-scale landfill region and their health risk impacts

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Frontiers of Environmental Science & Engineering 2022年第12期16卷 101-109页

作者： Yanfeng Yang Ruina Zhang ziyang Lou College of Environmental and Chemical Engineering Shanghai University of Electric PowerShanghai200090China Shanghai Environmental Sanitation Engineering Design Institute Co. Ltd.Shanghai200323China Shanghai Engineering Research Center of Solid Waste Treatment and Resource Recovery School of Environmental Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092China

Landfills are widely complained about due to the long-term odor and landfill gas emissions for local residents,while the bioaerosols are always neglected as another threat to on-site *** this study,bioaerosols samples were collected from the typical operation scenes in the large-scale modern landfill,and the emission levels of airborne bacteria,pathogenic species,and fungi were quantified and *** corresponding exposure risks were assessed based on the average daily dose via inhalation and skin *** was found that the levels of culturable bacteria and fungi in all landfill samples were around 33–22778 CFU/m3 and 8–450 CFU/m3,and the active-working landfill area and the covered area were the maximum and minimum emission sources,respectively,meaning that the bioaerosols were mainly released from the areas related with the fresh waste *** sp.,Massilia sp.,Methylobacterium-Methylorubrum *** Noviherbaspirillum *** the main bacterial populations,with a percentage of 42.56%,89.82%,70.24%and 30.20%respectively in total bioaerosols *** regards to the health risk,the health risks via inhalation were the main potential risks,with four orders of magnitude higher than that of skin ***-working area showed the critical point for non-carcinogenic risks,with a hazard quotient of 1.68,where 80 m protection distance is recommended for on-site worker protection,plus more careful protection measures.

关键词： Microbial aerosols Landfill sites Health risk assessment CALPUFF