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Hierarchical model updating for high-speed maglev vehicle/guideway coupled system based on multiobjective optimization

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Frontiers of Structural and Civil Engineering 2024年第5期18卷 788-804页

作者： dexiang Li Jingyu Huang College of Civil Engineering Tongji UniversityShanghai 200092China national Maglev Transportation Engineering r&d {2. Tongji UniversityShanghai 201804China

The high-speed maglev vehicle/guideway coupled model is an essential simulation tool for investigating vehicle dynamics and mitigating coupled *** improve its accuracy efficiently,this study investigated a hierarchical model updating method integrated with field ***,a high-speed maglev vehicle/guideway coupled model,taking into account the real effect of guideway material properties and elastic restraint of bearings,was developed by integrating the finite element method,multi-body dynamics,and electromagnetic levitation ***,simultaneous in-site measurements of the vehicle/guideway were conducted on a high-speed maglev test line to analyze the system response and structural modal *** the hierarchical updating,an Elman neural network with the optimal Latin hypercube sampling method was used to substitute the FE guideway model,thus improving the computational *** multi-objective particle swarm optimization algorithm with the gray relational projection method was applied to hierarchically update the parameters of the guideway layer and magnetic force layer based on the measured modal parameters and the electromagnet vibration,***,the updated coupled model was compared with the field measurements,and the results demonstrated the model’s accuracy in simulating the actual dynamic response,validating the effectiveness of the updating method.

关键词： high-speed maglev vehicle/guideway coupled model field measurement model updating neural network multi-objective optimization

LdAS&ET-Ad:Learnable distillation Attack Strategies and Evolvable Teachers Adversarial distillation

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Computers, Materials & Continua 2024年第5期79卷 2331-2359页

作者： Shuyi Li Hongchao Hu Xiaohan Yang Guozhen Cheng Wenyan Liu Wei Guo national digital Switching System Engineering&Technological r&d {2. The PLA Information Engineering UniversityZhengzhou450000China

Adversarial distillation(Ad)has emerged as a potential solution to tackle the challenging optimization problem of loss with hard labels in adversarial ***,fixed sample-agnostic and student-egocentric attack strategies are unsuitable for ***,the reliability of guidance from static teachers diminishes as target models become more *** paper proposes an Ad method called Learnable distillation Attack Strategies and Evolvable Teachers Adversarial distillation(LdAS&ET-Ad).Firstly,a learnable distillation attack strategies generating mechanism is developed to automatically generate sample-dependent attack strategies tailored for distillation.A strategy model is introduced to produce attack strategies that enable adversarial examples(AEs)to be created in areas where the target model significantly diverges from the teachers by competing with the target model in minimizing or maximizing the Ad ***,a teacher evolution strategy is introduced to enhance the reliability and effectiveness of knowledge in improving the generalization performance of the target *** calculating the experimentally updated target model’s validation performance on both clean samples and AEs,the impact of distillation from each training sample and AE on the target model’s generalization and robustness abilities is assessed to serve as feedback to fine-tune standard and robust teachers *** evaluate the performance of LdAS&ET-Ad against different adversarial attacks on the CIFAr-10 and CIFAr-100 *** experimental results demonstrate that the proposed method achieves a robust precision of 45.39%and 42.63%against AutoAttack(AA)on the CIFAr-10 dataset for resNet-18 and MobileNet-V2.respectively,marking an improvement of 2.31%and 3.49%over the baseline *** comparison to state-of-the-art adversarial defense techniques,our method surpasses Introspective Adversarial distillation,the top-performing method in terms of robustne

关键词： Adversarial training adversarial distillation learnable distillation attack strategies teacher evolution strategy

An orchestrated ethylene-gibberellin signaling cascade contributes to mesocotyl elongation and emergence of rice direct seeding

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Journal of Integrative Plant Biology 2024年第7期66卷 1427-1439页

作者： Yusong Lyu Xinli dong Shipeng Niu ruijie Cao Gaoneng Shao Zhonghua Sheng Guiai Jiao Lihong Xie Shikai Hu Shaoqing Tang Xiangjin Wei Peisong Hu State Key Laboratory of rice Biology and Breeding China National Center for Rice ImprovementChina National Rice Research InstituteHangzhou 310006China College of Agriculture and Biotechnology Zhejiang UniversityHangzhou 310058China

A mechanized direct seeding of rice with less labor and water usage,has been widely ***,this approach requires varieties that exhibit uniform seedling *** elongation(ME)offers the main drive of fast emergence of rice seedlings from soils;nevertheless,its genetic basis remains ***,we identify a major rice quantitative trait locus Mesocotyl Elongation1(qME1),an allele of the Green revolution gene Semi-dwarf1(Sd1),encoding GA2.-oxidase for gibberellin(GA)***1 expression is strongly induced by soil depth and *** rice grains are direct-seeded in soils,the ethylene core signaling factor OsEIL1 directly promotes ME1 transcription,accelerating bioactive GA *** GAs further degrade the dELLA protein SLENdEr rice 1(SLr1),alleviating its inhibition of rice PHYTOCHrOME-INTErACTING FACTOr-LIKE13(OsPIL13)to activate the downstream expansion gene OsEXPA4 and ultimately promote rice seedling ME and *** ancient traits of long mesocotyl and strong emergence ability in wild rice and landrace were gradually lost in company with the Green revolution dwarf breeding process,and an elite ME1-r allele(d349H)is found in some modern Geng varieties(long mesocotyl lengths)in northern china,which can be used in the direct seeding and dwarf breeding of Geng ***,the ectopic and high expression of ME1 driven by mesocotyl-specific promoters resulted in rice plants that could be direct-seeded without obvious plant architecture or yield ***,we reveal the molecular mechanism of rice ME,and provide useful information for breeding new Green revolution varieties with long mesocotyl suitable for direct-seeding practice.

关键词： rice(Oryza sativa L.) direct seeding Green revolu-tion mesocotyl elongation ethylene gibberellin semi-dwarf1(Sd1)

OsCPK12.phosphorylates OsCATA and OsCATC to regulate H2.2.homeostasis and improve oxidative stress tolerance in rice

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Plant Communications 2024年第3期5卷 179-196页

作者： Beifang Wang Pao Xue Yingxin Zhang Xiaodeng Zhan Weixun Wu Ping Yu daibo Chen Junlin Fu Yongbo Hong Xihong Shen Lianping Sun Shihua Cheng Qunen Liu Liyong Cao State Key Laboratory of rice Biology and Breeding China National Rice Research InstituteHangzhou 311400China Northern rice research center of Bao Qing Shuangyashan 155600China Zhejiang Key Laboratory of Super rice research China National Rice Research InstituteHangzhou 311400China

Calcium-dependent protein kinases(CPKs),the best-characterized calcium sensors in plants,regulate many aspects of plant growth and development as well as plant adaptation to biotic and abiotic ***,how CPKs regulate the antioxidant defense system remains largely *** previously found that impaired function of OsCPK12.leads to oxidative stress in rice,with more H2.2.lower catalase(CAT)activity,and lower ***,we explored the roles of OsCPK12.in oxidative stress tolerance in *** results show that OsCPK12.interacts with and phosphorylates OsCATA and OsCATC at *** of either OsCATA or OsCATC leads to an oxidative stress phenotype accompanied by higher accumulation of *** of the phosphomimetic proteins OsCATAS11d and OsCATCS11d in oscpk12.cr reduced the level of H2.2.***,OsCATAS11d and OsCATCS11d showed enhanced catalase activity in vivo and in ***12.overexpressing plants exhibited higher CAT activity as well as higher tolerance to oxidative *** demonstrate that OsCPK12.affects CAT enzyme activity by phosphorylating OsCATA and OsCATC at Ser11 to regulate H2.2.homeostasis,thereby mediating oxidative stress tolerance in rice.

关键词： OsCPK12 OsCATs oxidative tolerance Oryza sativa L

A new type of lipophilic hydrophobic self-repairing cellulose insulating paper developed with ST-110/FAS/PTFE ternary system as coating substrate

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High Voltage 2024年第2期9卷 474-483页

作者： Zhenglin Zeng Jinshan Qin Zuhao Wang Weimin Tan Chao Tang College of Engineering and Technology Southwest UniversityChongqingChina International r&d {2. for New Technologies of Smart Grid and Equipment ChongqingChina

The moisture generated by the ageing of the oil-paper insulating system can easily lead to the deterioration of the performance of the insulating *** order to alleviate the impact of moisture on the performance of the insulating paper,we developed a kind of lipophilic hydrophobic self-repairing cellulose insulating paper(new insulating paper)based on the ternary system of polytetrafluoroethylene,fluorocarbon surfactant and fluorinated alkyl silane,and accelerated thermal ageing test for 45 days at 130°C was carried *** experimental results show that the new insulating paper with excellent lipophilic property can realise hydrophobic self-repairing through heat treatment after physical *** tensile strength and elongation at break of the new insulating paper increased by 5%–8%and 6.2.%–2.%respectively compared with the original cellulose insulating *** the end of ageing,the relative dielectric constant and dielectric loss factor of new insulating paper are 10.4%and 9.9%lower than that of the original cel-lulose insulating paper,while the breakdown voltage is 6.8%*** acid and moisture content produced during the ageing process of the insulating oil impregnated with new insulating paper are also less,indicating that the coating can delay the ageing of the insulating paper.

关键词： coating moisture cellulose

Combined Promoting Effects of Specific Organic Functional Groups and Alumina Surface Characteristics for the design of a Highly Efficient NiMo/Al_(2.O_(3) Hydrodesulfurization Catalyst

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china Petroleum Processing & Petrochemical Technology 2024年第1期26卷 1-11页

作者： Li Huifeng Li Mingfeng Zhang Le Wang Wei Nie Hong national Energy r&d {2. of Petroleum refining Technology SINOPEC Research Institute of Petroleum Processing Co.Ltd.Beijing 100083China

To prepare a highly efficient NiMo/Al_(2.O_(3) hydrodesulfurization catalyst,the combined effects of specific organic functional groups and alumina surface characteristics were ***,the correlation between the surface characteristics of four different alumina and the existing Mo species states was *** was found that the Mo equilibrium adsorption capacity can be used as a specific descriptor to quantitatively evaluate the changes in surface characteristics of different alumina.A lower Mo equilibrium adsorption capacity for alumina means weaker metal-support interaction and the loaded Mo species are easier to transform into ***,the Mo-O-Al bonds still exist at the metal-support *** introduction of cationic surfactant hecadecyl trimethyl ammonium bromide(CTAB)can further improve Mo species dispersion through electrostatic attraction with Mo anions and interaction of its alkyl chain with the alumina surface;meanwhile,the introduction of ethylenediamine tetraacetic acid(EdTA)can complex with Ni ions to enhance the Ni-promoting effect on ***,the NiMo catalyst designed using alumina with lower Mo equilibrium adsorption capacity and the simultaneous addition of EdTA and CTAB exhibits the highest hydrodesulfurization activity for 4,6-dimethyl dibenzothiophene because of its proper metal-support interaction and more well-dispersed Ni-Mo-S active phases.

关键词： alumina Mo equilibrium adsorption capacity organic functional groups metal-support interaction hydrodesulfurization

Genetic analysis and fine mapping of a grain size QTL in the smallgrain sterile rice line Zhuo2.1S

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Journal of Integrative Agriculture 2024年第7期23卷 2155-2163页

作者： Bin Lei Jiale Shao Feng Zhang Jian Wang Yunhua Xiao Zhijun Cheng Wenbang Tang Jianmin Wan College of Agronomy Hunan Agricultural UniversityChangsha 410128China national Key Facility for Crop Gene resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory for Crop Genetics and Germplasm Enhancement/Jiangsu Plant Gene Engineering research center Nanjing Agricultural UniversityNanjing 210095China State Key Laboratory of hybrid rice Hunan Hybrid Rice Research CenterChangsha 410125China

The development and application of the small-grain rice sterile line Zhuo2.1S(Z2.1S)has demonstrated its potential for mechanized hybrid rice seed production,leading to significant cost ***,the molecular mechanism responsible for the small-grain size characteristic of Z2.1S remains *** this study,we conducted a genetic analysis using near-isogenic lines constructed from Z2.0S,a small-grain rice sterile line,and r2.15,a normal-grain *** results revealed that the small-grain trait in Z2.1S is governed by a single partially dominant gene which also enhances grain *** mapping,we localized the causal gene to the short arm of chromosome 2.within a 113 kb physical region delimited by the molecular markers S2.4-1 and *** analysis and gene expression assays indicated LOC_Os02.14760 as the most likely candidate gene,suggesting that the small-grain size trait of Z2.1S is controlled by a novel locus that has not been previously identified.

关键词： rice grain size map-based cloning

Interaction Between Ustilaginoidea virens and rice and Its Sustainable Control

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rice science 2024年第3期31卷 269-284页

作者： ZHANG Fengmin CAO Zhenzhen ZHENG Xin HE Yuntao CHEN Mingxue LIN Xiaoyan rice Product Quality Inspection&Supervision Testing center of Ministry of Agriculture and rural Affairs China National Rice Research InstituteHangzhou 310006China

Ustilaginoidea virens is a common rice pathogen that can easily lead to a decline in rice quality and the production of toxins pose potential risks to human *** this review,we present a comprehensive literature review of research since the discovery of rice false *** provide a comprehensive and,at times,critical overview of the main results and findings from related research,and propose future research ***,we delve into the interaction between *** and rice,including the regulation of transcription factors,the process of *** infecting rice panicles,and the plant immune response caused by rice *** that,we discuss the identification and characterization of mycotoxins produced by the pathogenic fungus,as well as strategies for disease *** emphasize the importance of comprehensive agricultural prevention and control methods for the sustainable management of *** knowledge will update our understanding of the interaction between *** and rice plants,offering a valuable perspective for those interested in ***.

关键词： rice false smut flower-specific infection mycotoxin food safety plant disease

Prediction of dissolved gas content in transformer oil based on multi-information fusion

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High Voltage 2024年第3期9卷 685-699页

作者： Tongliang Yang Yun Fang Chengming Zhang Chao Tang dong Hu College of Engineering and Technology Southwest UniversityChongqingChina International r&d {2. for New Technologies of Smart Grid and Equipment Southwest UniversityChongqingChina

In order to accurately predict the content and variation trend of dissolved gas in trans-former oil and guide the condition maintenance of power transformers,a combined prediction model based on multi-information fusion is proposed and its effectiveness is *** of all,based on the possibility of pathological and missing historical sample data,a detection and filling method based on variable weight combination samples is ***,the authors propose two *** at the non-linear and non-stationary characteristics of gas content,a univariate decomposition prediction mode HBA-VMd-TCN which based on the Honey Badger algorithm,variational mode decomposition and time convolutional network(TCN)is *** the multi-variate Informer prediction model is established for gas content affected by multiple ***,the cross-entropy theory is used to determine the weight coefficients of the two models,and the multi-information fusion combined prediction model is ***,on the basis of the above,a method to determine the time step and the position information of the transition point adaptively in the process of prediction is proposed to further improve the prediction *** results show that,through a series of simulation experiments of model comparison and transformer anomaly prediction,the accuracy and effectiveness of the combined prediction model are verified.

关键词： content prediction dissolved