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SSRN 2023年

作者： Xu, Guiju Liu, Chuqing Yang, Chunlei Zhang, Hongwei Hou, Chenghao Peng, Lizeng Wang, Lei Zhao, Ru-Song Institute of Food & Nutrition Science and Technology Shandong Academy of Agricultural Sciences Jinan China Qilu University of Technology Shandong Academy of Sciences Shandong Analysis and Test Center Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province Jinan China Shandong Institute for Food and Drug Control Jinan China

The effective detection of adrenergic receptor agonists (ARAs) residues in milk is of great significance for protecting human health. In this work, the milk was first deproteinated and extracted by methanol, and then concentrated by the self-made solid-phase extraction (SPE) cartridge. The hydroxylated covalent organic framework (COF) was synthesized by polymerization of tris(4-aminophenyl)amine and 1,3,5-tris(4-formyl-3-hydroxyphenyl)benzene and served as the SPE cartridge packing. This hydroxylated COF was featured with hierarchical flower-like morphology, easy preparation, and copious active adsorption sites. The adsorption model fittings and molecular simulation were applied to explore the adsorption characteristics. A sensitive method was fabricated for the determination of four α2- and five β2-ARAs residues in milk by liquid chromatography–tandem mass spectrometry. The linear ranges of the ARAs were from 0.25 to 50 μg·kg−1;the intra-day and the inter-day repeatability were in the range of 2.9−7.9% and 2.0−10.1%, respectively. This method was successfully applied to determine the ARAs residues in commercial milk samples. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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Thermal hazard evaluation and risk assessment of 1-allyl-3-methylimidazole nitrate ionic liquid

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AIP Advances 2024年第3期14卷

作者： Zhang, Jie Qian, Demeng Zhang, Han Jiang, Juncheng Zhang, Xu He, Tao Wang, Jianye Liu, Shang-Hao Anhui Huainan231001 China Provincial Engineering Research Center for New Energy Vehicle Intelligent Control and Simulation Test Technology of Sichuan Sichuan Chengdu610039 China Guangxi Key Laboratory of Automobile Components and Vehicle Technology Guangxi University of Science and Technology Guangxi Liuzhou545616 China College of Safety Science and Engineering Nanjing Tech University Jiangsu Nanjing211816 China Shanxi Automobile Huainan Special Purpose Vehicle Co. Ltd. Anhui Huainan231001 China Department of Chemical and Materials Engineering National Yunlin University Science and Technology Yunlin64002 Taiwan

Imidazole ionic liquids (ILs) have broad application prospects in batteries and other fields. Researching the thermal decomposition features of ILs holds paramount importance for the application in battery electrolyte. 1-allyl-3-methylimidazole nitrate ionic liquid (IL) as a new functional IL, and its related thermal decomposition properties are unknown. In this paper, the thermal decomposition peculiarities of 1-allyl-3-methylimidazole nitrate IL were systematically analyzed by thermogravimetric analyzer, differential scanning calorimetry, and accelerating rate calorimeter techniques, and the relevant thermodynamic parameters and thermal decomposition models were derived. In addition, 1-allyl-3-methylimidazole nitrate IL possesses strong thermal runaway characteristics and the risk of thermal runaway is also evaluated. The main gaseous products formed by the pyrolysis of 1-allyl-3-methylimidazole nitrate IL was detected and analyzed by thermogravimetry-Fourier transform infrared spectroscopy and thermogravimetric-photoionization mass spectrometry techniques. The results showed that flammable gas, toxic gas, and asphyxiating gas are formed during the pyrolysis of 1-allyl-3-methylimidazole nitrate IL. This study lays a theoretical foundation for the safe application and the formulation of corresponding safety protection measures of 1-allyl-3-methylimidazole nitrate IL. © 2024 Author(s).

关键词： Ionic liquids

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Effect of Synergistic Microalloying on the Microstructural Optimization of Mo/Nial Alloy with Excellent Mechanical Properties Under Rapid Non-Equilibrium Solidification

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SSRN 2024年

作者： Zhong, Xinmiao Li, Yilu Yang, Hong-Yu Shao, Yong Jia, Meng Qiu, Feng Jiang, Qichuan State Key Laboratory of Automotive Simulation and Control Jilin University China Key Laboratory of Automobile Materials Ministry of Education Department of Materials Science and Engineering Jilin University Renmin Street NO. 5988 Jilin Province Changchun130025 China School of Materials Science and Engineering Jiangsu University of Science and Technology Zhenjiang212003 China QA Department and Test Center FAW-Volkswagen Automotive Co. Ltd Jilin Province Changchun130011 China

Low room-temperature plasticity and poor high-temperature strength extremely restrain the extensive application of NiAl composites. Herein, our work synergistically optimized the NiAl microstructure via alloying of Mo to relieve imbalance of strength ductility under rapid non-equilibrium solidification supplemented with the first principle calculation. Remarkably, the addition of Mo significantly refined the microstructure of NiAl-15Mo. Moreover, enhanced by the uniform precipitation Mo phase, the coordinately deformed Mo phase at the grain boundary and the partial Mo solid solution occupied Ni sites, the NiAl-15Mo showed superior strength-ductility. The mechanical properties (σ0.2, σUCS, UT) of NiAl-15Mo composites at room temperature were 944 MPa, 1841 MPa, and 27068 MPa·%, which were increased by ~55.3%, ~48.7% and ~41.0% compared with the conventional NiAl composites, respectively. In particular, owing to solid-solution Mo atoms restrict the climb of dislocations and the stronger covalent bond orbital hybridization between Ni-3d and Mo-4d, the mechanical properties (σ0.2, σUCS, UT) of NiAl-15Mo at 1000 ℃ are 212 MPa, 265 MPa and 7922 MPa·%, which has an increase of ~175.3 %, ~120.8 % and ~228.0%, respectively. This work provides a new perspective to manipulate and coordinate Mo multiple reinforcing ways and achieve the high strength and plasticity of NiAl composites. © 2024, The Authors. All rights reserved.

关键词： Ductility

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Algorithm Design and Software Implementation for Real-Time Detection of Echoes

Algorithm Design and Software Implementation for Real-Time D...

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2019 IEEE International Conference on Power, Intelligent Computing and Systems, ICPICS 2019

作者： Lin, Cao Min, Shi Science and Technology on Underwater Test and Control Laboratory Dalian116013 China Navy Academic of Armor Beijing China

ISBN: (纸本)9781728137209

In view of how to effectively detect a complete pulse period and the echo signal without triggering information and the fixed pulse cycle, this paper proposed a real-time detection algorithm of echo signal and developed a detection software of echo signal on the platform of Visual C++. First of all, the relative frequency domain energy detection algorithm was adopted to detect a pulse cycle through the adaptive threshold. Then, the echo signal was detected by the copy correlation algorithm. At last, the results were visualized in real time for the users. The experiment of the algorithm showed that the software can detect the complete pulse cycle and echo signal, and the performance of the system is quite stable. © 2019 IEEE.

关键词： Signal detection

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Efficient Degradation and Detoxification of Antibiotic Fosfomycin by Uv Irradiation in the Presence of Persulfate

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SSRN 2023年

作者： Wu, Jingyi Xu, Zhe Yao, Kun Wang, Zhu Li, Ruobai Zuo, Linzi Liu, Guoguang Feng, Yiping Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and Engineering Institute of Environmental Health and Pollution Control Guangdong University of Technology Guangzhou510006 China Institute of Environmental Research at Greater Bay Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education Guangzhou Key Laboratory for Clean Energy and Materials Guangzhou University Guangzhou510006 China School of Environmental Science and Engineering Guangdong University of Petrochemical Technology Maoming525000 China Analysis and Test Center Guangdong University of Technology Guangzhou510006 China

Fosfomycin (FOS) as a widely used antibiotic has been found in abundance throughout the environment, yet little attention has been paid to its treatment. In this study, we systemically looked into the degradation of FOS by ultraviolet-activated persulfate (UV/PS) in aqueous solutions. Our findings demonstrated that FOS can be degraded efficiently under the UV/PS, e.g., more than 90% of FOS was degraded with 0.1368 Einstein cm-2 of UV irradiance and 20 μM of PS. HO• was the dominant radical responsible for FOS degradation. FOS degradation increased as PS dosage increased, while initial pH had little effect. Natural water constitutes either promoted (e.g., Cu2+, Fe3+, and SO42-) or inhibited (e.g., humic acid, HCO3-, and CO32-) FOS degradation to varying degrees. Hydroxyl substitution, C–P bond cleavage, and coupling reactions were the major degradation pathways for FOS degradation. Finally, the toxicity evaluation revealed that FOS was toxic to E. coli and S. aureus, but the toxicity of the intermediate products of FOS to E. coli and S. aureus rapidly decreased over time after UV/PS treatment. Therefore, these findings provided a fundamental understanding of the transformation process of FOS and supplied useful information for the environmental elimination of FOS contamination and its toxicity. © 2023, The Authors. All rights reserved.

关键词： Toxicity

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A Fast Design Method for Ultra Broadband Absorbers Using RC Equivalent Circuit Model

A Fast Design Method for Ultra Broadband Absorbers Using RC ...

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International Applied Computational Electromagnetics Society Symposium (ACES)

作者： Xianglin Kong Lei Zhao Fengjun Wang Shengjun Zhang Yixiang Fu Xiaoyu Pang Xiaochun Liu Xiaopeng Shen School of Information and Control Engineering China University of Mining and Technology Xu Zhou CA China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematical Beijing China Key Laboratory of Aeronautical Science and Technology for High Performance Electromagnetic Window Jinan China School of Materials and Physics China University of Mining and Technology Xuzhou China

An accuracy and efficient approach is proposed to fast design ultra-wideband microwave absorbers. The RC equivalent circuit model of absorbers is established according to impedance matching and transmission line theory. The model is suitable for low and high-frequency absorbers composed of multilayer square high impendence surface (HIS) and air layers of impendence matching. Absorbers with different parameters can be fast designed by utilizing the proposed model and genetic algorithm. The reflection coefficient of RC circuit and full-simulation are in good agreement, both of them are lower than -10 dB within 2-18 GHz or 4-50 GHz (fractional bandwidth of 160% or 170.37%), with the total thickness close to the Rozanov limit. An absorber is fabricated and measured to further verify the accuracy of the model. The measured results have a good agreement with the RC circuit model, which indicates the proposed method is an efficient way for fast designing ultra-broadband thin absorbers using double-layer (or multilayer) square HIS.

关键词： Microwave measurement Atmospheric modeling Transmission line measurements Nonhomogeneous media Microwave theory and techniques Microwave circuits Frequency measurement

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Size-controllable Synthesis of Defective Copper-Based Metal-Organic Frameworks for Adsorption of Organosulfur Compounds

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SSRN 2023年

作者： Sun, Xin Fu, Quanbin Ren, Jun Ai, Shiyun Zhao, Rusong Qiao, Xuguang Key Laboratory of Food Processing Technology and Quality Control in Shandong Province College of Food Science and Engineering Shandong Agricultural University Taian271018 China College of Chemistry and Material Science Shandong Agricultural University Taian271018 China Shandong Analysis and Test Center Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province Jinan250014 China School of chemical engineering and technology Shanxi Key Laboratory of High Performance Battery Materials and Devices North University of China Taiyuan030051 China

Defect generation in metal-organic frameworks (MOFs) is important for many potential applications. As a new member of MOFs, MFM-170 has attracted extensive attention due to its more open metal sites (OMSs). Therefore, there is great interest in developing the defective MFM-170. In this work, defective and nanoscale MFM-170 (360–750 nm) was prepared by replacing nitric acid with acetic acid, and the size and defect level were closely related to the amount of acetic acid. Then, the adsorption performance of the defective MFM-170 was tested and the adsorption kinetics were considered. The experimental results show that the MFM-170-200 sample achieves the largest adsorption capacity of organosulfur compounds (OSCs) (149.02-171.33 mg·g-1) compared with original MOF, which is due to the presence of more adsorption sites and excellent adsorption-diffusion behavior. In addition, the adsorption properties of MFM-170-200 for ajoene and 2-ethenyl-4H-1, 3-dithiine (2-VDT) were further investigated. The infrared, Raman spectroscopy, XPS analysis and density functional theory (DFT), confirmed the strong interaction between sulfides and MFM-170. The enhanced OSCs adsorptive properties of MFM-170 highlight the advantage of defective MOFs as new adsorbent material toward environmental sustainability. Meanwhile, it provides a clue for materials modification and new mechanisms for water treatment. © 2023, The Authors. All rights reserved.

关键词： Adsorption

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A research on blind area of random layout units for localization 2

A research on blind area of random layout units for localiza...

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2nd International Conference on Mechanical, Electric and Industrial Engineering, MEIE 2019

作者： Wang, Zhizhuan Li, Ling Li, Guijuan Wang, Yang Science and Technology on Underwater Test and Control Laboratory Zhongshan Section Binhai Street 16 Dalian city116013 China

Acquisition distance information of the underwater target is very important to evaluate the target noise level, so it is necessary to do some research on the passive localization method for the underwater target. In this paper, the multi-hydrophone units model is used to passively achieve target localization information in the underwater environment;the accurate DOA estimation and ranging calculation method are presented. The localization blind area problem with different units models is discussed. The blind area problem caused by traditional passive localization model (three units) is solved by the method with four random units, which can locate the underwater unpredictable target in arbitrary direction. © 2019 IOP Publishing Ltd.

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Research on the real-time positioning method of vector buoys in deep sea

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Journal of Physics: Conference Series 2021年第1期1812卷

作者： Zhizhuan Wang Mingwei Zhang Ling Li Guijuan Li Yunfei Chen Xuegang Zhang Science and Technology on Underwater Test and Control Laboratory Dalian China

Buoys are generally difficult to anchor in Deep-sea environment, at the same, due to the influence of long-term in the ocean environment, the location relationship between each other buoys will change, which may cause the traditional predicted method of buoy system trapped in losing efficacy. This paper researched on the problem of the buoy baseline length vary positioning method applicability, on the basis of this study, focused on the theoretical analysis and simulation of applicability to different positioning method. Following this, a realtime positioning method based on vector buoys system in deep sea is presented. Covered the applicability shortage of traditional underwater acoustic passive positioning, used multiple vector buoys to locate the target jointly, and provide a theory basis for real-time positioning function of vector buoys in engineering. The simulation results show that this method is feasible and effective.

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A Dynamics Perspective of Defense-Intrusion Game

A Dynamics Perspective of Defense-Intrusion Game

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Chinese control Conference (CCC)

作者： Keyang Wang Rui Zhao Yintao Wang School of Marine Science and Technology Northwestern Polytechnical University Xi'an P. R. China National Key Laboratory of Underwater Information and Control Xi'an P. R. China The 705 Research Institute of China State Shipbuilding Corporation Limited Xi'an P. R. China

Defense-intrusion games are fascinating in both nature and the artificial world. In these games, the purpose of defender is to protect the target from being attacked by the intruder, and if possible, capture the intruder. This article solves the defense-intrusion game with considering the bio-inspired model adopted by two agents-a defender and an intruder, and obtains the attack and interception strategies. The intruder usually need to avoid the defender, so we provide attack strategy based on setting the intruder's emergency maneuver distance, and compare it with the strategy based on artificial potential field method proposed in our previous work. For the defender, we design a radical interception strategy and a conservative interception strategy according to different circumstances. Numerical simulations are conducted to illustrate the effectiveness of the proposed strategies. The results are consistent with natural observations and disclose some natural laws in the defense-intrusion scenario. This paper will provide a reference for the research of intrusion prevention related to marine robots.

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