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Significant effect of ordered micro-domain on cell boundary phase distribution and demagnetization curve squareness of Sm_(2)Co_(17)-type magnet

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Rare Metals 2024年第4期43卷 1724-1735页

作者： Zhuang Liu Hai-Chen wu Chao-Yue Zhang Chao-Qun Zhu Guo-Xin Chen Huan-Ming Lu ren-Jie Chen Aru Yan CISRI&NIMTE Joint Innovation Center for Rare Earth Permanent Magnets Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China University of Chinese Academy of Sciences Beijing100049China Analytical Center Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China

Cu-rich cell boundary phase is difficult to precipitate evenly,resulting in a generally poor demagnetization curve squareness for Fe-rich Sm_(2)Co_(17)-type magnet,which is a key factor limiting the further improvement of magnetic energy *** this study,we report that nanoscale strip-like ordered micro-domains distributed in1:7H disordered matrix phase of the solid solution precursor is a new factor significantly affecting the precipitation and distribution of the cell boundary *** strip-like and continuous micro-twin structure with twin boundaries neatly perpendicular to the C-axis is observed after sintering *** solution treatment,sequential and long strip-like micro-twins gradually transform into disordered state along the basal plane,forming narrow disordered 1:7H(TbCu_(7)-type structure)phase between the separated strip-like ordered *** disordering transformation takes place via broken down of the long strip-like ordered micro-domains,which is accomplished by narrowing along the width direction followed by reduction of the ***,a new model revealing the effect of the ordered micro-domains on the formation of the cell boundary phase is *** boundaries enriched in Cu have already existed in the precursor with long strip-like ordered ***,the Cu-rich cell boundary phase acting as strong pinning centers cannot be precipitated homogeneously and distributed continuously after aging,resulting in a poor demagnetization curve squareness of Sm_(2)Co_(17)-type *** results indicate that significant broken down of the nanoscale ordered micro-domains in solution precursor is the key factor improving the distribution of cell boundary phase in Sm_(2)Co_(17)-type magnets.

关键词： Sm_(2)Co_(17) magnets Solution precursor Ordered micro-domains Disordering transformation Cellular structure

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Emerging tropane alkaloids:Global development and potential health threats

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Food Quality and Safety 2024年第1期8卷 12-26页

作者： Zile Wang Shiqi Chen Pimiao Zheng Zhenhui ren Huixia Zhang Jing Zhang Bing Shao Congming wu Haiyang Jiang Department of Veterinary Pharmacology and Toxicology Beijing Key Laboratory of Detection Technology for Animal-Derived Food SafetyBeijing Laboratory for Food Quality and SafetyNational Key Laboratory of Veterinary Public Health and SafetyCollege of Veterinary MedicineChina Agricultural UniversityBeijingChina. College of Veterinary Medicine Shandong Agricultural UniversityTaianChina. Tianjin Key Laboratory of Agricultural Animal Breeding and Healthy Husbandry College of Animal Science and Veterinary MedicineTianjin Agricultural UniversityTianjinChina Beijing Key Laboratory of Diagnostic and Traceability Technologies for Food Poisoning Beijing Center for Disease Prevention and ControlBeijingChina.

Tropane alkaloids(TAs)are a kind of plant secondary metabolite that mainly originate from *** have potent anticholinergic activity,and are well-known anticholinergic drugs,but have also been reported as plant *** studies have been conducted on TAs,but no scientometric research has been *** study aimed to expound the knowledge network and development of the feld of TAs and predict the emerging development topics based on *** particular,this research combined VOSviewer and CiteSpace for visualization and covered 1,298 related scientifc publications(1953–2022).The research on TAs is rapidly developing,with the participation of 86 countries,1,129 research institutions,and 4,087 ***,the University of Geneva,and *** are the most productive country,institution,and researcher,***,the main research topics on TAs include biosynthesis,in vitro synthesis,chemical synthesis,and determination *** 2018,the monitoring of TAs in food related to human health has shown citation burst characteristics,which is considered an emerging development trend in the *** fndings of this study will enable researchers to quickly tap into the knowledge background/structure of TAs from massive data to provide a reference for further research.

关键词： Tropane alkaloids bibliometrics biosynthesis in vitro synthesis chemical synthesis determination contamination food safety

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Typhoon-Induced Ocean Waves and Stokes Drift:A Case Study of Typhoon Mangkhut(2018)

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China Ocean Engineering 2024年第4期38卷 711-724页

作者： wu Zhi-yuan GAO Kai CHEN Jie ZHANG Hao-jian DENG Bin JIANG Chang-bo LIU Yi-zhuang LYU Zhao YAN ren School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China School of Civil Engineering Hunan University of TechnologyZhuzhou 412007China

Ocean waves and Stokes drift are generated by *** study investigated the characteristics of ocean waves and wave-induced Stokes drift and their effects during Typhoon Mangkhut using European Centre for MediumRange Weather Forecasts(ECMWF)ERA5 datasets and observational *** results revealed that the typhoon generated intense cyclones and huge typhoon waves with a maximum wind speed of 45 m/s,a minimum pressure of955 h Pa,and a maximum significant wave height of 12 *** Stokes drift caused by typhoon waves exceeded 0.6m/s,the Stokes depth scale exceeded 18 m,and the maximum Stokes transport reached 6 m^(2)/*** spatial distribution of 10-m wind speed,typhoon wave height,Stokes drift,Stokes depth,and Stokes transport during the typhoon was highly correlated with the typhoon *** distribution along the typhoon track showed significant zonal asymmetry,with greater intensity on the right side of the typhoon track than on the left *** findings provide important insights into the impact of typhoons on ocean waves and Stokes drift,thus improving our understanding of the interactions between typhoons and the ocean *** study also investigated the contribution of Stokes transport to the total net transport during typhoons using Ekman-Stokes Numbers as a comparative *** results indicated that the ratio of Stokes transport to the total net transport reached up to 50%within the typhoon radius,while it was approximately 30%outside the *** Stokes transport induced by typhoon waves led to divergence in the transport direction,which resulted in upwelling of the lower ocean as a compensation ***,Stokes transport played a crucial role in the vertical mixing of the ocean during *** findings suggested that Stokes transport should be paid more attention to,particularly in high latitude ocean regions,where strong winds can amplify its effects.

关键词： Stokes drift typhoon waves Ekman-Stokes transport vertical mixing Typhoon Mangkhut

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Optical responses of metallic plasmonic arrays under the localized excitation

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Nano Research 2024年第3期17卷 1571-1577页

作者： Sen Yan Hao Ma Yi-Fan Bao Maofeng Cao Chuan Liu Kaifeng Zhang Xiaowei wu Jianbo He Xiang Wang Bin ren State Key Laboratory of Physical Chemistry of Solid Surfaces Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361005China Research&Development Group HitachiLtd.Yokohama 244-0817KanagawaJapan Department of Electronic Science and Engineering Kyoto UniversityKyoto 615-8510Japan

The metallic plasmonic array that can support both propagating surface plasmon polaritons(PSPPs)and localized surface plasmon resonance(LSPR)possesses rich optical properties and remarkable optical performance,making it a powerful platform for applications in photonics,chemistry,and *** practical applications,the excitation spot is usually smaller than the area of metal *** is thus imperative to address“how many array units are enough?”towards a rational design of plasmonic ***,we employed focused ion beam(FIB)to precisely fabricate a series of plasmonic array structures with increased unit *** utilizing photoluminescence(PL)and surface-enhanced Raman spectroscopy(SERS),we found that the array units outside the excitation spot still have a significant impact on the optical response within the *** with the numerical simulation,we found that the boundary of the finite array leads to the loss of PSPP outside the excitation point,which subsequently affects the coupling of PSPP and LSPR in the excitation spot,leading to variations in PL and SERS *** on the findings,we further tuned the LSPR mode of the metal arrays by electrodeposition to obtain strong near-field enhancement without any influence on the PSPP *** work advances the understanding of near-field and far-field optical behavior in finite-size array structures and provides guidance for designing highly-efficient photonic devices.

关键词： plasmonic periodic array finite-size effects dark field scattering surface-enhanced Raman spectroscopy(SERS)

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Evaluating the performance of genomic selection on purebred population by incorporating crossbred data in pigs

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Journal of Integrative Agriculture 2024年第2期23卷 639-648页

作者： Jun Zhou Qing Lin Xueyan Feng Duanyang ren Jinyan Teng Xibo wu Dan wu Xiaoke Zhang Xiaolong Yuan Zanmou Chen Jiaqi Li Zhe Zhang Hao Zhang College of Animal Science South China Agricultural University/State Key Laboratory of Swine and Poultry Breeding Industry/National Engineering Research Center for Breeding Swine IndustryGuangzhou 510642China guangxi State Farms Yongxin Animal Husbandry Group Co. Ltd.Nanning 530022China

Genomic selection(GS)has been widely used in livestock,which greatly accelerated the genetic progress of complex *** population size was one of the significant factors affecting the prediction accuracy,while it was limited by the purebred *** to directly combining two uncorrelated purebred populations to extend the reference population size,it might be more meaningful to incorporate the correlated crossbreds into reference population for genomic *** this study,we simulated purebred offspring(PAS and PBS)and crossbred offspring(CAB)base on real genotype data of two base purebred populations(PA and PB),to evaluate the performance of genomic selection on purebred while incorporating crossbred *** results showed that selecting key crossbred individuals via maximizing the expected genetic relationship(REL)was better than the other methods(individuals closet or farthest to the purebred population,CP/FP)in term of the prediction ***,the prediction accuracy of reference populations combining PA and CAB was significantly better only based on PA,which was similar to combine PA and ***,the rank correlation between the multiple of the increased relationship(MIR)and reliability improvement was *** for individuals with low correlation(Cor(Pi,PA or B),the reliability improvement was significantly lower than other *** findings suggested that incorporating crossbred into purebred population could improve the performance of genetic prediction compared with using the purebred population *** genetic relationship between purebred and crossbred population is a key factor determining the increased reliability while incorporating crossbred population in the genomic prediction on pure bred individuals.

关键词： pigs crossbred population genomic selection reference population construction relationship

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Bidirectional energy-controlled piezoelectric shunt damping technology and its vibration attenuation performance

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International Journal of Mechanical System Dynamics 2024年第1期4卷 63-76页

作者： Yipeng wu Quan Yuan Kaibin ren Xin Shen Hui Shen Adrien Badel Hongli Ji Jinhao Qiu State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and AstronauticsNanjingChina College of Mechanical and Electrical Engineering Qingdao UniversityQingdaoChina SYMME Laboratory Universite Savoie Mont BlancAnnecy le VieuxFrance

Piezoelectric material-based semi-active vibration control systems may effectively suppress vibration amplitude without any external power supply,or even harvest electrical *** bidirectional electrical energy control phenomenon is theoretically introduced and validated in this paper.A flyback transformer-based switching piezoelectric shunt circuit that can extract energy from or inject energy into piezoelectric elements is *** analytical expressions of the controlled energy and the corresponding vibration attenuation are therefore derived for a classical electromechanical cantilever *** predictions validated by the experimental results show that the structure vibration attenuation can be tuned from−5 to−25 dB under the given electrical quality factor of the circuit and figure of merit of the electromechanical structure,and the consumed power is in the range of−13 to 25 mW,which is a good theoretical basis for the development of self-sensing,self-adapting,and self-powered piezoelectric vibration control systems.

关键词： vibration control piezoelectric shunt damping electromechanical energy

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Short-Term Household Load Forecasting Based on Attention Mechanism and CNN-ICPSO-LSTM

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Energy Engineering 2024年第6期121卷 1473-1493页

作者： Lin Ma Liyong Wang Shuang Zeng Yutong Zhao Chang Liu Heng Zhang Qiong wu Hongbo ren New Energy Technology Center State Grid Beijing Electric Power Research InstituteBeijing100075China College of Energy and Mechanical Engineering Shanghai University of Electric PowerShanghai200090China

Accurate load forecasting forms a crucial foundation for implementing household demand response plans andoptimizing load scheduling. When dealing with short-term load data characterized by substantial fluctuations,a single prediction model is hard to capture temporal features effectively, resulting in diminished predictionaccuracy. In this study, a hybrid deep learning framework that integrates attention mechanism, convolution neuralnetwork (CNN), improved chaotic particle swarm optimization (ICPSO), and long short-term memory (LSTM), isproposed for short-term household load forecasting. Firstly, the CNN model is employed to extract features fromthe original data, enhancing the quality of data features. Subsequently, the moving average method is used for datapreprocessing, followed by the application of the LSTM network to predict the processed data. Moreover, the ICPSOalgorithm is introduced to optimize the parameters of LSTM, aimed at boosting the model’s running speed andaccuracy. Finally, the attention mechanism is employed to optimize the output value of LSTM, effectively addressinginformation loss in LSTM induced by lengthy sequences and further elevating prediction accuracy. According tothe numerical analysis, the accuracy and effectiveness of the proposed hybrid model have been verified. It canexplore data features adeptly, achieving superior prediction accuracy compared to other forecasting methods forthe household load exhibiting significant fluctuations across different seasons.

关键词： Short-term household load forecasting long short-term memory network attention mechanism hybrid deep learning framework

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Evaluation of Resistance of Different Kiwifruit Varieties (Lines) to Canker Disease and Brown Spot Disease

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1249-1261页

作者： Wenwen Su Chongpei Zheng Zhencheng Han Chunguang ren Di wu Tao Li Yi Yang Weijie Li Institute of Mountain Resources of Guizhou Province Guizhou Academy of SciencesGuiyang550001China Guizhou Botanical Garden Guizhou Academy of SciencesGuiyang550001China Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region(Ministry of Education) Institute of Agro-Bioengineering/College of Life SciencesGuizhou UniversityGuiyang550025China

Kiwifruit canker and brown spot are signiﬁcant diseases affecting kiwis,caused by Pseudomonas syringae patho-genic variations(Pseudomonas syringae ***(Psa))and Corynesporapolytica(Corynespora cassiicola).At present,the research on canker disease and brown spot disease mainly focuses on the isolation and identiﬁcation of pathogenic bacteria,drug control,resistance gene mining and functional veriﬁ*** has proved that breeding disease resistant varieties are an effective method to control canker disease and brown spot ***,most existing cultivars lack genes for canker and brown spot *** kiwifruit resources in nat-ure exhibit extensive genetic diversity due to prolonged natural selection,containing numerous resistance ***,due to insufﬁcient understanding of the resistance of most kiwifruit varieties(lines)to canker disease and brown spot disease,some high-quality resources have not been fully *** incidence of canker and brown spot of 18 kiwifruit cultivars(lines)was measured by inoculating isolated branches and leaves,and their resistance to canker and brown spot was analyzed according to the length,disease index,mean diameter,and systematic *** results were as follows:Among 18 different kiwifruit varieties(lines)for canker disease,there were two highly resistant materials,eight disease-resistant materials,four disease-susceptible materials,and two highly susceptible ***,regarding brown spot disease,there were one highly resistant material,ﬁve dis-ease-resistant materials,four susceptible materials,and three highly susceptible ***,four resources were resistant to both *** outcomes provided a theoretical basis for breeding kiwifruit against canker and brown spot.

关键词： Kiwifruit canker disease brown spot resistance evaluation

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Interaction between adolescent sleep rhythms and gender in an obese population

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World Journal of Clinical Cases 2024年第1期12卷 86-94页

作者： Nan-Nan wu Guo-Li Yan Hong-Yu Zhang Ling Sun Min Hou guang-Ming Xu Department of Laboratory Medicine Tianjin Chest HospitalTianjin 300222China Mental Health Center of Tianjin Medical University Tianjin Anding HospitalTianjin 300222China Department of Child and Adolescent Psychology Mental Health Center of Tianjin Medical UniversityTianjin 300222China

BACKGROUND The obesity rate of adolescents is gradually increasing,which seriously affects their mental health,and sleep plays an important role in adolescent *** To investigate the relationship between sleep rhythm and obesity among adolescents and further explores the interactive effect of sleep rhythm and gender on adolescent obesity,providing a theoretical basis for developing interventions for adolescent *** Research data source Tianjin Mental Health Promotion Program for *** April to June 2022,this study selected 14201 students from 13 middle schools in a certain district of Tianjin as the research subject using the convenient cluster sampling *** these students,13374 accepted and completed the survey,with an effective rate of 94.2%.The demographic data and basic information of adolescents,such as height and weight,were collected through a general situation *** sleep rhythm of adolescents was evaluated using the reduced version of the morningness-eveningness *** A total of 13374 participants(6629 females,accounting for 49.56%;the average age is 15.21±1.433 years)were *** them,the survey showed that 2942 adolescent were obesity,accounting for 22%and 2104 adolescent were overweight,accounting for 15.7%.Among them,1692 male adolescents are obese,with an obesity rate of 25.1%,higher than 18.9%of female *** is a statistically significant difference between the three groups(χ2=231.522,Prence in age among the three groups(F=69.996,P<0.000).Obesity rates are higher among individuals who are not-only-child,have residential experience within six months,have family economic poverty,and have evening-type sleep(P<0.05).Logistic regression analysis shows a correlation between sleep rhythm and adolescent ***-type sleep rhythm can increase the risk of obesity in male adoles

关键词： Adolescent Obesity Sleep rhythm Gender Interaction

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Rational design of robust and transparent superrepellent surfaces for long-term marine antifouling

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Science China(Technological Sciences) 2024年第7期67卷 2031-2039页

作者： CHEN Hui WANG Zhi WANG DaHeng XIAO Feng FU guang-En BU XueLing ZHAO Lei ZHANG Tao wu DaHeng PU JiBin The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science&TechnologyWuhan 430081China Key Laboratory of Advanced Marine Materials Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo 315201China

Superhydrophobic surfaces have demonstrated exceptional efficacy in combatting biofouling contaminations of optical devices and equipment in marine applications. However, the fabrication of highly transparent superhydrophobic materials remains a formidable challenge due to the inherent trade-off between surface roughness for superhydrophobicity and optical ***, we design a robust and transparent superhydrophobic coating(Si-POSS) embedded silica nanoparticles(200 nm) with fluorinated polyhedral oligomeric silsesquioxanes(F-POSS) and zinc pyrithione(ZPT). The Si-POSS coating exhibits excellent water repellence toward diverse liquids and optical transmittance exceeding 90% in the visible spectrum. Moreover, the Si-POSS coating sustains long-term anti-bacterial(> 99.11%) and anti-algal effects for over 30 days, accompanied by mechanical,chemical, and thermal stability. This research asserts that the Si-POSS coating with outstanding combined characteristics holds significant potential for marine applications, particularly in self-cleaning and antifouling endeavors.

关键词： superhydrophobic surface transparent marine antifouling nanoparticles

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