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Design and polarization scattering characteristics of L-shape reflector 5

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Design and polarization scattering characteristics of L-shap...

IET International Radar Conference 2020, IET IRC 2020

作者： Huang, Jiankai Wang, ZhanLing Pang, Chen Li, Jianbing Li, Yongzhen State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System College of Electronic Science and Engineering National University of Defense Technology Hunan Changsha410073 China

ISBN: (纸本)9781839535635

This paper presents a new L-shape reflector to enhance the cross-polarization radar cross section (RCS). Cross-polarization component can increase the jamming effect against the polarization radars. Such L-shape reflectors can also be used as radar tags in cars, books and so on for radar target detection. By bending the structure of traditional dipole reflector to L shape, the direction of surface current is changed, which produces the cross-polarization component. We have simulated L-shape reflector with different lengths of branches in X-band. Compared with the scattering characteristics of traditional dipole reflector, the linear depolarization ratio (LDRvh) of the L-shape reflector can be easily controlled by changing the length of two branches. © 2020 Institution of engineering and technology. All rights reserved.

关键词： Radar cross section

Heat transfer enhancement-driven synergistic kinetic promotion of methane hydrate formation-dissociation cycles for advanced solidified natural gas technology

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Energy 2025年 331卷

作者： Wang, Bin Feng, Jing-Chun Zhang, Yue Zhang, Yuhang Chen, Xiao Xie, Yan Wang, Pengfei Zhang, Si Research Centre of Ecology & Environment for Coastal Area and Deep Sea Guangdong University of Technology Guangzhou 510006 China Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) Guangzhou 511458 China Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds Guangdong University of Technology Guangzhou 510006 China Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology Guangzhou 510006 China Advanced Institute for Ocean Research & Institute of Major Scientific Facilities for New Materials Southern University of Science and Technology Shenzhen 518055 China

The rising demand for natural gas, driven by its lower carbon footprint and abundant reserves, has intensified the focus on developing efficient, safe, and sustainable gas storage solutions. Hydrate-based solidified natural gas (SNG) technology stands out as a promising environmentally friendly option, offering advantages such as low energy consumption and reduced carbon emissions. However, its commercial deployment remains limited by the inherently slow kinetics of hydrate formation and the inefficient release of gas during dissociation. To address these dual challenges, this study investigated the pivotal role of heat transfer in enhancing the kinetics of both methane hydrate formation and dissociation. Porous sediments with varying thermal conductivities were prepared by adjusting the volume ratios of silica and alumina particles, thereby systematically modifying their heat transfer properties. Experimental results demonstrate that improved heat transfer effectively accelerated both hydrate formation and dissociation process, enabling more efficient gas storage and release. Specifically, the average hydrate formation rates at t50 and t90 in the high-thermal-conductivity alumina sediment were 5.08 and 6.27 times higher, respectively, than those in the low-thermal-conductivity silica sediment. During dissociation, the time interval between t50 and t90 was reduced by 59.10 % in the alumina sediment. These findings provide mechanistic insights into the critical role of thermal management in promoting hydrate formation and dissociation and overcoming kinetic limitations. The results offer practical guidance for designing thermally efficient hydrate-based SNG systems and contribute to the advancement of scalable, industrial-ready technologies for low-carbon energy storage and transportation. © 2025

关键词： Formation and dissociation Gas storage and transportation Heat transfer Kinetics Methane hydrate

Facile Synthesis of Pure Silicon Zeolite-Confined Silver Nanoparticles and Their Catalytic Activity for the Reduction of 4-Nitrophenol and Methylene Blue

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SSRN 2022年

作者： Liu, Sheng Guo, Yujuan Yi, Shunmin Yan, Shijing Ouyang, Chaoliu Deng, Fei Li, Chunxue Liao, Guangfu Li, Qing Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer Materials School of Materials Science and Engineering Hubei University Wuhan430062 China Key Laboratory of Chemistry and Engineering of Forest Products State Ethnic Affairs Commission Guangxi Key Laboratory of Chemistry and Engineering of Forest Products Guangxi Collaborative Innovation Center for Chemistry and Engineering of Forest Products Guangxi University for Nationalities Nanning530006 China College of Ecological Environment and Urban Construction Fujian University of Technology Fuzhou350118 China College of Material Engineering Fujian Agriculture and Forestry University Fuzhou350002 China

Supported noble metal heterogeneous catalysts have been proven to be effective for the treatment of toxic organic pollutants. Herein, ultrafine Ag nanoparticles (NPs) with an average size of approximately 4.37 nm was decorated on the surface of pure silicon zeolite (PSZN) and confined in pore channels through a low-cost and environmentally friendly in-situ reduction strategy. The prepared Ag/PSZN nanocomposites showed ultrahigh catalytic activity for the reduction of 4-nitrophenol (4-NP) (~17.29×10-3 s-1) and methylene blue (MB) (~76.53×10-2 min-1), which outperforms the majority of the previously reported Ag-based catalysts. The excellent catalytic performance is due to the large loading amount (Wt=16.8%) and ultrasmall size of Ag NPs, which provides abundant active sites. In addition, it also showed outstanding recyclability and storage stability. This work offers new insights into the fabrication of Ag-based catalysts for efficiently removing organic pollutants from aqueous solutions. © 2022, The Authors. All rights reserved.

关键词： Silver nanoparticles

Migration of Nanocolloid-Carrying Antibiotics in Paddy Red Soil During Organic Fertilization Process

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SSRN 2023年

作者： Jiang, Yu Zhang, Yifei Liang, Yuanyuan Liu, Wen Wang, Yu Yang, Jiewen Qiu, Rongliang Di, Hong J. Dan, A. Engineering and Technology Research Center Agricultural Land Pollution Integrated Prevention and Control Guangdong Higher Education Institute College of Resources and Environment Zhongkai University of Agriculture and Engineering Guangzhou510225 China Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety College of Natural Resources and Environment South China Agricultural University Guangzhou510642 China Soil & Physical Science Department Lincoln University Lincoln Christchurch7647 New Zealand

Nanocolloid particles in soil are highly mobile and can act as carriers to transport pollutants such as antibiotics to a wider and deeper range of soils and even underground aquifers. Although nanocolloids play a crucial role on the migration of antibiotics, the inherent behavior and mechanism of nanocolloid-carrying antibiotics in soil remains unclear. In this study, we conducted a comprehensive investigation on the migration of antibiotics in paddy red soil, carried by four common soil nanocolloids, namely kaolin (KL), montmorillonite (MT), hematite (HT) and humic acid (HA). The results showed that organic nanocolloids (i.e., HA) and mineral nanocolloids (i.e., HT) facilitated the soil adsorption of antibiotics, whereas clay nanocolloids (i.e., MT and KL) did not. Nanocolloid carriers not only promoted the vertical transfer of antibiotics within the same medium (from the soil surface to bottom), but also enhanced their horizontal transfer between different mediums (from organic fertilizers to soil). Moreover, the migration mechanisms of antibiotics carried by various nanocolloids were also different: the phenolic hydroxyl and carboxyl groups of HA could esterify with the carboxyl groups of quinolones and the phenolic hydroxyl groups of tetracyclines, respectively;the oxygen atoms of HT formed stabilizing complexes with the soil, which could further adsorb antibiotics using their functional group-rich complexes;smaller antibiotic compounds could be adsorbed in the metal oxide interlayer of MT via cation exchange, while KL could adsorb antibiotics on its metal oxide surface layer through the same way but was susceptible to be desorbed. © 2023, The Authors. All rights reserved.

关键词： Antibiotics

Responses of morphological and physiological traits to herbivory by snails of three invasive and native submerged plants

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Journal of Plant Ecology 2022年第3期15卷 571-580页

作者： Xiaolong Huang Jinlei Yu Baohua Guan Hongmin Xie Shuailing Liu Hu He Kuanyi Li State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Jiangsu Jiangda Eco Technology Co. Ltd.Wuxi 214135China Sino-Danish College University of Chinese Academy of SciencesBeijing 100049China College of Environmental and Chemical Engineering Chongqing Three Gorges UniversityWanzhou 404000China

The submerged plant species Carolina fanwort(Cabomba caroliniana)has become a dominant invasive aquatic plant in the Lake Taihu Basin(LTB)in *** species may escape their original specialist enemies and encounter fewer enemies in their new *** were assumed to have suffered less herbivory than native species as they are relatively unpalatable(the enemy release hypothesis[ERH]).The objective of this study was to compare the responses of *** with those of co-occurring native species to herbivory from native *** conducted a mesocosm experiment to record the responses of *** and two commonly co-occurring native submerged plant counterparts,water thyme(Hydrilla verticillata)and Eurasian watermilfoil(Myriophyllum spicatum),to herbivory by two native generalist gastropod snails,Radix swinhoei and Sinotaia *** morphological traits(total biomass,shoot/root[S/R]biomass ratio and relative growth rate[RGR])and physiological traits(leaf total nonstructural carbohydrate[TNC],lignin,and cellulose)were *** snail *** rarely influenced the plant traits of the three submerged *** the increasing numbers of *** treatments,most of the plant traits of *** and *** changed,while those of *** showed a relatively stable *** result indicates that *** is more resistant to herbivory by the snail ***,which is consistent with the ERH *** finding indicates that herbivorous snail species contributes to the invasion of ***,which potentially alters the species composition of submerged plants in the plant community.

关键词： aquatic plant biological invasion Cabomba caroliniana enemy release hypothesis Lake Taihu Basin plant–herbivore interactions

Correction: Biosynthesis, Signaling, Homeostasis, Transport, and Regulatory Mechanisms of Cytokinin in Rice and Arabidopsis Response to Heat Stress

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Journal of Plant Growth Regulation 2025年 1-2页

作者： Mas-ud, Md. Atik Juthee, Sadiya Arefin Chowdhury, Md. Rayhan Hosenuzzaman, Md. Hossain, Md. Firose Zaki, Randa Mohammed Rabbee, Muhammad Fazle Matin, Mohammad Nurul National Key Laboratory of Crop Genetic Improvement College of Plant Science and Technology Huazhong Agricultural University Wuhan China Department of Crop Botany Bangladesh Agricultural University Mymensingh Bangladesh Graduate School of Medicine Science and Technology Shinshu University Nagano Japan UWA School of Agriculture and Environment The University of Western Australia Perth Australia Department of Biomolecular Engineering Graduate School of Engineering Tohoku University Sendai Japan Department of Pharmaceutics College of Pharmacy Prince Sattam Bin Abdulaziz University Al-Kharj Saudi Arabia Department of Pharmaceutics and Industrial Pharmacy Faculty of Pharmacy Beni-Suef University Beni-Suef Egypt Department of Biotechnology Yeungnam University Gyeongsan Republic of Korea Department of Genetic Engineering and Biotechnology University of Rajshahi Rajshahi Bangladesh

'Nano Killers' Activation by Permonosulfate Enables Efficient Anaerobic Microorganisms Disinfection

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SSRN 2022年

作者： Wang, Jin Wang, Yi Ren, Wenyu Zhang, Dun Ju, Peng Dou, Kunpeng CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling Institute of Oceanology Chinese Academy of Sciences Qingdao266071 China University of Chinese Academy of Sciences Beijing100039 China Open Studio for Marine Corrosion and Protection Pilot National Laboratory for Marine Science and Technology Qingdao266237 China College of Materials Science and Engineering Qingdao University of Science and Technology Qingdao266042 China Key Laboratory of Marine Eco-Environmental Science and Technology Marine Bioresource and Environment Research Center First Institute of Oceanography Ministry of Natural Resources Qingdao266061 China College of Information Science and Engineering Ocean University of China Qingdao266100 China

The development of effective nanomaterials for killing anaerobic bacteria is essential for human health and economic development. Here, we propose a new bactericidal mechanism where theoretical calculations are in good agreement with experimental results. The "poison arrow-head" of MoS 2 nanosheets enables the vigorous extraction of lipids from the cell membrane. Based on density functional calculations , oxidation active species (OAS) are generated due to the strong adsorption energy between S vacancies in MoS 2 and chemical substrates (permonosulfate (PMS) and H 2 O). These OAS can be visualized as numerous moving "nano killers", constantly oxidizing the lipids around MoS 2;thereby, re- releasing the surface of the sharp knife . The process of physical extraction collaborated with chemical oxidation not only precisely positions the cell membrane but also allows for continuous sterilization. This work digs into the mechanism of anaerobic bacterial sterilization, which sheds significant light on biological analysis, antibacterial, cancer therapy, and anti microbiologically influenced corrosion. © 2022, The Authors. All rights reserved.

关键词： Nanosheets

Deciphering the Resistance Dissemination of Electrochemically Treated Erythromycin Fermentation Residue Via Metagenomics Combining Machine Learning

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SSRN 2022年

作者： Zhou, Jieya Wang, Shuai Wu, Hao Shi, Lihu Shen, Yunpeng Tian, Shulei Hou, Li-An State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing100012 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China School of Environmental Science and Engineering Hebei University of Science and Technology Shijiazhuang050080 China State Environmental Protection Engineering Center for Harmless Treatment Resource Utilization of Antibiotic Residues Khorgos835007 China High Tech Inst Beijing Beijing100085 China

Erythromycin fermentation residue (EFR) represents a typical hazardous waste produced by the microbial pharmaceutical industry. Although electrolysis is promising for EFR disposal, its microbial threats remain unclear. Herein, metagenomics was coupled with the random forest technique to decipher the antibiotic resistance patterns of electrochemically treated EFR. Results showed that 95.75% of erythromycin could be removed in 2 h. Electrolysis temporarily influenced EFR microbiota, where the relative abundances of Proteobacteria and Actinobacteria increased, while those of Fusobacteria, Firmicutes, and Bacteroidetes decreased. A total of 505 antibiotic resistance gene subtypes encoding resistance to 21 antibiotic types and 150 MGEs, mainly including plasmid (72) and transposase (52), were assembled in EFR. Significant linear regression models were identified among microbial richness, ARG subtypes, and MGE numbers (r2=0.501-0.809, p © 2022, The Authors. All rights reserved.

关键词： Electrolysis

High-quality reference genomes of swallowtail butterflies provide insights into their coloration evolution

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Zoological Research 2022年第3期43卷 367-379页

作者： Jin-Wu He Ru Zhang Jie Yang Zhou Chang Li-Xin Zhu Si-Han Lu Fei-Ang Xie Jun-Lai Mao Zhi-Wei Dong Gui-Chun Liu Ping Hu Yan Dong Wen-Ting Wan Ruo-Ping Zhao Tian-Zhu Xiong Jorge LLeón-Cortés Chu-Yang Mao Wei Zhang Shuai Zhan Jun Li Lei Chen Wen Wang Xue-Yan Li State Key Laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunmingYunnan 650223China School of Ecology and Environment Northwestern Polytechnical UniversityXi’anShaanxi 710072China Department of Biology and Food Engineering Chuzhou UniversityChuzhouAnhui 239000China School of Marine Science and Technology Zhejiang Ocean UniversityZhoushanZhejiang 316022China Department of Organismic and Evolutionary Biology Harvard UniversityCambridgeMA 02138USA Ecología para la Conservación de la Fauna Silvestre El Colegio de la Frontera Sur(ECOSUR)Carretera Panamericana y Periférico Sur s/n Barrio María AuxiliadoraSan Cristóbal de Las CasasChiapas CP 29290Mexico State Key Laboratory of Protein and Plant Gene Research Peking UniversityBeijing 100871China CAS Key Laboratory of Insect Developmental and Evolutionary Biology CAS Center for Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 200032China Kunming College of Life Science University of Chinese Academy of SciencesKunmingYunnan 650223China Center for Excellence in Animal Evolution and Genetics KunmingYunnan 650223China

Swallowtail butterflies(Papilionidae)are a historically significant butterfly group due to their colorful wing patterns,extensive morphological diversity,and phylogenetically important position as a sister group to all other butterflies and have been widely studied regarding ecological adaption,phylogeny,genetics,and ***,they contain a unique class of pigments,i.e.,papiliochromes,which contribute to their color diversity and various biological functions such as predator avoidance and mate *** date,however,the genomic and genetic basis of their color diversity and papiliochrome origin in a phylogenetic and evolutionary context remain largely ***,we obtained high-quality reference genomes of 11 swallowtail butterfly species covering all tribes of Papilioninae and Parnassiinae using long-read sequencing *** with previously published butterfly genomes,we obtained robust phylogenetic relationships among tribes,overcoming the challenges of incomplete lineage sorting(ILS)and gene *** genomic analyses indicated that the evolution of Papilionidae-specific conserved non-exonic elements(PSCNEs)and transcription factor binding sites(TFBSs)of patterning and transporter/cofactor genes,together with the rapid evolution of transporters/cofactors,likely promoted the origin and evolution of *** findings not only provide novel insights into the genomic basis of color diversity,especially papiliochrome origin in swallowtail butterflies,but also provide important data resources for exploring the evolution,ecology,and conservation of butterflies.

关键词： High-quality reference genome Swallowtail butterfly tribe Color evolution Papiliochromes