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New Control Paradigm for Industry 5.0:From Big Models to Foundation Control and Management 被引量:18
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作者 Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2023年第8期1643-1646,共4页
DO we need a fundamental change in our professional culture and knowledge foundation for control and automation?If so,what are necessary and critical steps we must take to ensure such a change would take place effecti... DO we need a fundamental change in our professional culture and knowledge foundation for control and automation?If so,what are necessary and critical steps we must take to ensure such a change would take place effectively and efficiently,or more general,smoothly and sustainably? 展开更多
关键词 smoothly STEPS CULTURE
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From Parallel Plants to Smart Plants:Intelligent Control and Management for Plant Growth 被引量:26
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作者 Mengzhen Kang Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2017年第2期161-166,共6页
Precision management of agricultural systems, aiming at optimizing profitability, productivity and sustainability, comprises a set of technologies including sensors, information systems, and informed management, etc. ... Precision management of agricultural systems, aiming at optimizing profitability, productivity and sustainability, comprises a set of technologies including sensors, information systems, and informed management, etc. Expert systems are expected to aid farmers in plant management or environment control, but they are mostly based on the offline and static information, deviated from the actual situation. Parallel management, achieved by virtual/artificial agricultural system, computational experiment and parallel execution, provides a generic framework of solution for online decision support. In this paper, we present the three steps toward the parallel management of plant: growth description U+0028 the crop model U+0029, prediction, and prescription. This approach can update the expert system by adding learning ability and the adaption of knowledge database according to the descriptive and predictive model. The possibilities of passing the knowledge of experienced farmers to younger generation, as well as the application to the parallel breeding of plant through such system, are discussed. © 2017 Chinese Association of Automation. 展开更多
关键词 AGRICULTURE Artificial intelligence Decision support systems Expert systems Sustainable development
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Optimal Constrained Self-learning Battery Sequential Management in Microgrid Via Adaptive Dynamic Programming 被引量:18
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作者 Qinglai Wei Derong Liu +1 位作者 Yu Liu Ruizhuo Song 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2017年第2期168-176,共9页
This paper concerns a novel optimal self-learning battery sequential control scheme for smart home energy systems. The main idea is to use the adaptive dynamic programming U+0028 ADP U+0029 technique to obtain the opt... This paper concerns a novel optimal self-learning battery sequential control scheme for smart home energy systems. The main idea is to use the adaptive dynamic programming U+0028 ADP U+0029 technique to obtain the optimal battery sequential control iteratively. First, the battery energy management system model is established, where the power efficiency of the battery is considered. Next, considering the power constraints of the battery, a new non-quadratic form performance index function is established, which guarantees that the value of the iterative control law cannot exceed the maximum charging/discharging power of the battery to extend the service life of the battery. Then, the convergence properties of the iterative ADP algorithm are analyzed, which guarantees that the iterative value function and the iterative control law both reach the optimums. Finally, simulation and comparison results are given to illustrate the performance of the presented method. © 2017 Chinese Association of Automation. 展开更多
关键词 Adaptive control systems Automation Battery management systems Control theory Electric batteries Energy management Energy management systems Intelligent buildings Iterative methods Number theory Secondary batteries
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A review of ecological mechanisms for management practices of protective forests 被引量:7
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作者 Jiaojun Zhu Lining Song Yu Lei 《Journal of Forestry Research》 SCIE CAS CSCD 2021年第2期435-448,共14页
A protective forest,including shelterbelt,windbreak,and shelter forest as its synonyms,is characterized by the protective functions of various forest types distributed or planted on ecologically fragile areas or nearb... A protective forest,including shelterbelt,windbreak,and shelter forest as its synonyms,is characterized by the protective functions of various forest types distributed or planted on ecologically fragile areas or nearby the objects that need to be protected using the ecological effects of forests.Ecological mechanisms for management practices of protective forests is one of the disciplinary orientations in forest ecology and management.Most protective forest studies are dependent on forestry eco-engineering,such as the Great Plains Shelterbelt Project in the United States,the Great Plan for the Transformation of Nature in the Soviet Union,and the Three-North Afforestation Program in China.The development of sustainable management of protective forests has been given increasing attention by governments,scientists,and media due to their impacts on environment conservation and global change.We introduce forestry ecoengineering and provide a review of their main ecological mechanisms for management practices of protective forests.Ecological mechanisms for management systems currently applied are emphasized,i.e.,the theory of protection maturity and phase-directional management;the relationship between structure and protective functions and structural optimization measures;and,the decline mechanism and ecological restoration strategies.In addition,several unresolved problems in management practices of protective forests are discussed as well as the prospects for ecological mechanisms for management practices of protective forests in the future,which include:(1)theories and technologies for management practices of protective forests at the landscape or regional scale;(2)the decline mechanisms and corresponding ecological restoration approaches across multiple scales;and,(3)the comprehensive assessment of forestry eco-engineering at large-scales based on ecosystem principles. 展开更多
关键词 Ecologically fragile areas Ecological effects Forestry eco-engineering Management systems Assessment of protective forests
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Parallel Building: A Complex System Approach for Smart Building Energy Management 被引量:12
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作者 Abdulaziz Almalaq Jun Hao +1 位作者 Jun Jason Zhang Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 SCIE EI CSCD 2019年第6期1452-1461,共10页
These days' smart buildings have high intensive information and massive operational parameters, not only extensive power consumption. With the development of computation capability and future 5 G, the ACP theory(i... These days' smart buildings have high intensive information and massive operational parameters, not only extensive power consumption. With the development of computation capability and future 5 G, the ACP theory(i.e., artificial systems,computational experiments, and parallel computing) will play a much more crucial role in modeling and control of complex systems like commercial and academic buildings. The necessity of making accurate predictions of energy consumption out of a large number of operational parameters has become a crucial problem in smart buildings. Previous attempts have been made to seek energy consumption predictions based on historical data in buildings. However, there are still questions about parallel building consumption prediction mechanism using a large number of operational parameters. This article proposes a novel hybrid deep learning prediction approach that utilizes long short-term memory as an encoder and gated recurrent unit as a decoder in conjunction with ACP theory. The proposed approach is tested and validated by real-world dataset, and the results outperformed traditional predictive models compared in this paper. 展开更多
关键词 ACP theory artificial intelligence data acquisition deep learning(DL) ENERGY CONSUMPTION machine LEARNING PARALLEL ENERGY PREDICTION PREDICTION algorithms smart grid
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Immune Control Strategies for Vaccinia Virus-related Laboratory-acquired Infections 被引量:4
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作者 WEI Qiang JIANG Meng Nan +1 位作者 HAN Jun WANG Zi Jun 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2014年第2期142-146,共5页
While presenting biological characteristics of vaccinia virus and laboratory-acquired infections during related research processes, this paper focuses on benefits and risks of vaccinia virus immunization in relation t... While presenting biological characteristics of vaccinia virus and laboratory-acquired infections during related research processes, this paper focuses on benefits and risks of vaccinia virus immunization in relation to laboratory-acquired infections, describes characteristics and the adaptation of vaccinia virus vaccine, analyses the role vaccinia virus immunization plays in the prevention and control of laboratory-acquired infections, and finally proposes solutions and countermeasures to further promote and implement immune control strategies. The problem related to immune strategy and laboratory- acquired infections which is being raised, analyzed and explored plays an active and instructive role in vaccinia virus related researches and laboratory- acquired infections, and also helps to recommend and develop relevant immune strategy for future vaccine control of such infections. 展开更多
关键词 Immune Control Strategies for Vaccinia Virus-related Laboratory-acquired Infections
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Research Progress of Parallel Control and Management 被引量:5
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作者 Gang Xiong Xisong Dong +1 位作者 Hao Lu Dayong Shen 《IEEE/CAA Journal of Automatica Sinica》 EI CSCD 2020年第2期355-367,共13页
Based on ACP(artificial systems,computational experiments,and parallel execution)methodology,parallel control and management has become a popularly systematic and complete solution for the control and management of co... Based on ACP(artificial systems,computational experiments,and parallel execution)methodology,parallel control and management has become a popularly systematic and complete solution for the control and management of complex systems.This paper focuses on summarizing comprehensive review of the research literature of parallel control and management achieved in the recent years including the theoretical framework,core technologies,and the application demonstration.The future research,application directions,and suggestions are also discussed. 展开更多
关键词 ACP methodology artificial systems computational experiments parallel control parallel management parallel systems
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Insights into the interplay between gut microbiota and lipid metabolism in the obesity management of canines and felines 被引量:2
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作者 Kaiqi Li Xiangyu Xiao +8 位作者 Yuling Li Sichen Lu Jianghang Zi Xiaoqiang Sun Jia Xu Hao‑Yu Liu Xiaoqiong Li Tongxing Song Demin Cai 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2024年第5期1761-1777,共17页
Obesity is a prevalent chronic disease that has significant negative impacts on humans and our companion animals,including dogs and cats.Obesity occurs with multiple comorbidities,such as diabetes,hypertension,heart d... Obesity is a prevalent chronic disease that has significant negative impacts on humans and our companion animals,including dogs and cats.Obesity occurs with multiple comorbidities,such as diabetes,hypertension,heart disease and osteoarthritis in dogs and cats.A direct link between lipid metabolism dysregulation and obesity-associated diseases has been implicated.However,the understanding of such pathophysiology in companion animals is lim-ited.This review aims to address the role of lipid metabolism in various metabolic disorders associated with obesity,emphasizing the involvement of the gut microbiota.Furthermore,we also discuss the management of obesity,including approaches like nutritional interventions,thus providing novel insights into obesity prevention and treatment for canines and felines. 展开更多
关键词 CAT DOG Gut microbiota Lipid metabolism Obesity Management
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Food-derived bio-functional peptides for the management of hyperuricemia and associated mechanism 被引量:1
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作者 Yanxin Wang Mingxia Ma +6 位作者 Yumeng Huang Siqing Fan Jie Peng Shiming Li Xiurong Su Yanbo Wang Chenyang Lu 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第4期1767-1786,共20页
Hyperuricemia,a metabolic disorder related to uric acid metabolism dysregulation,has become a common metabolic disease worldwide,due to changes in lifestyle and dietary structure.In recent years,owing to their high ac... Hyperuricemia,a metabolic disorder related to uric acid metabolism dysregulation,has become a common metabolic disease worldwide,due to changes in lifestyle and dietary structure.In recent years,owing to their high activity and few adverse effects,food-derived active peptides used as functional foods against hyperuricemia have attracted increasing attention.This article aims to focus on the challenge associated with peptide-specific preparation methods development,functional components identification,action mechanism(s)clarification,and bioavailability improvement.The current review proposed recent advances in producing the food-derived peptides with high anti-hyperuricemia activity by protein source screening and matched enzymatic hydrolysis condition adjusting,increased the knowledge about strategies to search antihyperuricemia peptides with definite structure,and emphasized the necessity of combining computer-aided approaches and activity evaluations.In addition,novel action mechanism mediated by gut microbiota was discussed,providing different insights from classical mechanism.Moreover,considering that little attention was paid previously on the structure-activity relationships of anti-hyperuricemia peptides,we collected the sequences from published studies and make a preliminary summary about the structure-activity relationships,which in turn provided guides for enzymatic hydrolysis optimization and bioavailability improvement.Hopefully,this article could promote the development,application and commercialization of food-derived anti-hyperuricemia peptides in the future. 展开更多
关键词 HYPERURICEMIA PEPTIDE Enzyme hydrolysis MECHANISM Structure-activity relationship BIOAVAILABILITY
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The Model Laboratory Animal and the 'Trojan Horse' in Biosecurity 被引量:1
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作者 Stephen Driver 《上海实验动物科学》 2003年第4期195-196,共2页
Today's sophisticated biomedical research sometimes requires the use of laboratory animals raised in stable micronen vironments free from the microorganisms that may compromise the success of an experiment. Labora... Today's sophisticated biomedical research sometimes requires the use of laboratory animals raised in stable micronen vironments free from the microorganisms that may compromise the success of an experiment. Laboratory rodents can be obtained in one of several categories defined by the degree to which they harbour microflora, whether commensal, potentially pathogenic or pathogenic. It is now possible to specify the different species of organism that are tolerated and those that are not tolerated, In such model laboratory animals it is essential to raise and maintain them in circumstances under which microorganisms that would not be tolerated cannot enter the production system. 展开更多
关键词 实验动物 生物安全 胚胎移植
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A global study of transcriptome dynamics in the venom gland of Solenopsis invicta Buren during laboratory rearing
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作者 LIMIN CHEN XIAOWEI LI +4 位作者 TIANJUN HE QUANCONG WU TINGTING CHEN JUN HUANG YAOBIN LU 《BIOCELL》 SCIE 2022年第3期821-828,共8页
Venom plays several important roles in the life of the fire ant,Solenopsis invicta Buren.Laboratory rearing significantly affected the toxin component of S.invicta.However,the molecular mechanism of the change of veno... Venom plays several important roles in the life of the fire ant,Solenopsis invicta Buren.Laboratory rearing significantly affected the toxin component of S.invicta.However,the molecular mechanism of the change of venomous components when kept in the laboratory is unclear.In this study,RNA sequencing technique(RNA-Seq)was performed to explore differentially expressed genes in the venom gland of S.invicta at 0,10,and 60 days after laboratory rearing.The RNA-Seq results showed that the expression of a large number of genes changed.The DEGs were involved in multiple pathways,including proteolysis,serine-type endopeptidase,and allergen.Furthermore,RNA-Seq and qRT-PCR data revealed that the expression of some genes related to proteolysis and allergen significantly decreased.Thus,our data generated new data relating to toxin-component and the transcriptome dynamics in the venom gland of S.invicta during laboratory rearing. 展开更多
关键词 Solenopsis invicta Buren RNA-SEQ VENOM Laboratory rearing
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Leveraging ROTI map derived from Indonesian GNSS receiver network for advancing study of Equatorial Plasma Bubble in Southeast/East Asia 被引量:1
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作者 Prayitno Abadi Ihsan N.Muafiry +8 位作者 Teguh N.Pratama Angga Y.Putra Suraina Gatot H.Pramono Sidik T.Wibowo Febrylian F.Chabibi Umar A.Ahmad Wildan P.Tresna Asnawi 《Earth and Planetary Physics》 EI CAS 2025年第1期101-116,共16页
This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signa... This paper highlights the crucial role of Indonesia’s GNSS receiver network in advancing Equatorial Plasma Bubble(EPB)studies in Southeast and East Asia,as ionospheric irregularities within EPB can disrupt GNSS signals and degrade positioning accuracy.Managed by the Indonesian Geospatial Information Agency(BIG),the Indonesia Continuously Operating Reference Station(Ina-CORS)network comprises over 300 GNSS receivers spanning equatorial to southern low-latitude regions.Ina-CORS is uniquely situated to monitor EPB generation,zonal drift,and dissipation across Southeast Asia.We provide a practical tool for EPB research,by sharing two-dimensional rate of Total Electron Content(TEC)change index(ROTI)derived from this network.We generate ROTI maps with a 10-minute resolution,and samples from May 2024 are publicly available for further scientific research.Two preliminary findings from the ROTI maps of Ina-CORS are noteworthy.First,the Ina-CORS ROTI maps reveal that the irregularities within a broader EPB structure persist longer,increasing the potential for these irregularities to migrate farther eastward.Second,we demonstrate that combined ROTI maps from Ina-CORS and GNSS receivers in East Asia and Australia can be used to monitor the development of ionospheric irregularities in Southeast and East Asia.We have demonstrated the combined ROTI maps to capture the development of ionospheric irregularities in the Southeast/East Asian sector during the G5 Geomagnetic Storm on May 11,2024.We observed simultaneous ionospheric irregularities in Japan and Australia,respectively propagating northwestward and southwestward,before midnight,whereas Southeast Asia’s equatorial and low-latitude regions exhibited irregularities post-midnight.By sharing ROTI maps from Indonesia and integrating them with regional GNSS networks,researchers can conduct comprehensive EPB studies,enhancing the understanding of EPB behavior across Southeast and East Asia and contributing significantly to ionospheric research. 展开更多
关键词 Equatorial Plasma Bubble(EPB) GNSS receivers’network Indonesia Continuously Operating Reference Station(Ina-CORS) ionospheric map Rate of TEC change index(ROTI)map
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The phytohormone jasmonic acid is involved in rice resistance to Southern rice black-streaked dwarf virus 被引量:1
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作者 Chaorui Huang Qing Liu +7 位作者 Qingling Qi Chenfei Gao Lulu Li Yanjun Li Jianping Chen Zongtao Sun Jianlong Xu Hehong Zhang 《The Crop Journal》 2025年第1期23-30,共8页
Viruses are significant pathogens causing severe plant infections and crop losses globally.The resistance mechanisms of rice to viral diseases,particularly Southern rice black-streaked dwarf virus(SRBSDV),remain poorl... Viruses are significant pathogens causing severe plant infections and crop losses globally.The resistance mechanisms of rice to viral diseases,particularly Southern rice black-streaked dwarf virus(SRBSDV),remain poorly understood.In this study,we assessed SRBSDV susceptibility in 20 Xian/indica(XI)and 20 Geng/japonica(GJ)rice varieties.XI-1B accessions in the Xian subgroup displayed higher resistance than GJ accessions.Comparative transcriptome analysis revealed changes in processes like oxidoreductase activity,jasmonic acid(JA)metabolism,and stress response.JA sensitivity assays further linked antiviral defense to the JA pathway.These findings highlight a JA-mediated resistance mechanism in rice and offer insights for breeding SRBSDV-resistant varieties. 展开更多
关键词 Oryza sativa(rice) Jasmonic acid Southern rice black-streaked dwarf virus(SRBSDV) Variety resistance Defense response
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High-concentration single-atom Zn-doped porous tubular g-C_(3)N_(4):a superior photocatalyst for tetracycline hydrochloride degradation and bacterial sterilization 被引量:1
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作者 Chunyan Li Yuxing Cai +9 位作者 Jianhao Wu Lan Li Sa-Sa Xia Xiaozhuo Wang Rongrong Jia Zhi Chen Cheng-Chao Jin Wen Wang Rongyan Wang Nan Zhang 《Rare Metals》 2025年第7期4756-4766,共11页
High-concentration single-atom doping remains a formidable challenge due to the propensity for single atoms to form clusters or aggregate at elevated concentrations.Herein,high-concentration (10.8 wt%) Zn singleatom-d... High-concentration single-atom doping remains a formidable challenge due to the propensity for single atoms to form clusters or aggregate at elevated concentrations.Herein,high-concentration (10.8 wt%) Zn singleatom-doped porous tubular g-C_(3)N_(4)(ZCN) was successfully obtained via a template-free,one-step calcination method,exhibiting excellent photocatalytic performance.The confinement of the pore walls suppresses the Zn atom'smigration and aggregation,enhancing the Zn single-atom stability.ZCN exhibited excellent photodegradation performance against tetracycline with outstanding stability.Moreover,ZCN displayed remarkable sterilization performance,achieving a 100%inactivation of Staphylococcus aureus within 90 min of visible-light exposure.Density functional theory calculations demonstrated that the Zn single-atom sites act as pivotal photocatalytic active sites,with the presence of Zn single atoms notably augmenting charge separation efficiency.This work provides a novel approach for managing photocatalytic efficiency through enlarging single-atom doping,offering an avenue for pollutant photodegradation and sterilization. 展开更多
关键词 Photocatalysis Zn single atoms Porous tubular g-C_(3)N_(4) Degradation of pollutants STERILIZATION
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Compensation for topographic effect on P-band PolSAR data with a polarimetric decomposition technique
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作者 Yin Zhang Ding-Feng Duan 《Journal of Electronic Science and Technology》 2025年第1期98-111,共14页
A P-band polarimetric synthetic aperture radar(PolSAR)sensor has deep penetration ability into and through the vegetation canopies in forested environments.Thus,the sensor is of great potential to accurately assess fo... A P-band polarimetric synthetic aperture radar(PolSAR)sensor has deep penetration ability into and through the vegetation canopies in forested environments.Thus,the sensor is of great potential to accurately assess forest parameters such as coverage,stand density,and tree height.Unfortunately,the radar backscatter from complex terrain can adversely impact the backscatter from trees or forests,and forest parameters assessed can be erroneous.Thus,reducing the topographic impact is an urgent must.In this study,a topographic compensation algorithm has been studied.To assess the algorithm’s validity and effectiveness,we applied it to P-band PolSAR datasets in four forested areas in the US.Trees in the forest stands have diverse species,and the topographic conditions of the terrain differ.Significant topographic impact on the P-band PolSAR data exists before the topographic compensation algorithm.After the algorithm,the impact decreases noticeably qualitatively and quantitatively.The algorithm is valid and effective in reducing the topographic influence on the PolSAR data and,consequently,provides a better chance of retrieving accurate forest parameters. 展开更多
关键词 Azimuthal symmetry or asymmetry Flat/non-flat terrain P-band PolSAR PolSAR decomposition Radar backscatter from forests Topographic compensation
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Exploration of a New Educational Model Based on Generative AIEmpowered Interdisciplinary Project-Based Learning
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作者 Qijun Xu Fengtao Hao 《Journal of Educational Theory and Management》 2025年第1期15-18,共4页
This study explores a novel educational model of generative AI-empowered interdisciplinary project-based learning(PBL).By analyzing the current applications of generative AI technology in information technology curric... This study explores a novel educational model of generative AI-empowered interdisciplinary project-based learning(PBL).By analyzing the current applications of generative AI technology in information technology curricula,it elucidates its advantages and operational mechanisms in interdisciplinary PBL.Combining case studies and empirical research,the investigation proposes implementation pathways and strategies for the generative AI-enhanced interdisciplinary PBL model,detailing specific applications across three phases:project preparation,implementation,and evaluation.The research demonstrates that generative AI-enabled interdisciplinary project-based learning can effectively enhance students’learning motivation,interdisciplinary thinking capabilities,and innovative competencies,providing new conceptual frameworks and practical approaches for educational model innovation. 展开更多
关键词 Generative AI Project-Based Learning Educational Model
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Application of magnetic nanomaterials in peptidomics:A review in the past decade
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作者 Yimin Guo Yiting Luo +2 位作者 Shuwen Hua Chuan-Fan Ding Yinghua Yan 《Chinese Chemical Letters》 2025年第6期264-277,共14页
Protein glycosylation and phosphorylation,as two of the most important protein post-translational modifications(PTMs),play key roles in living organisms.However,glycopeptides and phosphopeptides have low abundance in ... Protein glycosylation and phosphorylation,as two of the most important protein post-translational modifications(PTMs),play key roles in living organisms.However,glycopeptides and phosphopeptides have low abundance in biological samples.In addition,the low ionization efficiency and the severe signal interference in the presence of other peptides present great difficulties for their direct mass spectrometry(MS)analysis.Therefore,it is important to develop feasible enrichment strategies to pretreat glycopeptides and phosphopeptides in complex samples before MS detection.This paper reviews the application of various magnetic nanomaterials(MNMs)in glycopeptides and phosphopeptides in the last decade,with emphasis on the enrichment principles,the design and synthesis process of the materials,and the effectiveness of the application in biological samples.In addition,possible future trends and potential challenges are presented. 展开更多
关键词 GLYCOSYLATION PHOSPHORYLATION Magnetic nanomaterials ENRICHMENT Mass spectrometry
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In Memory of Wolter J.Fabrycky:A Pioneer of Systems Engineering and US-Sino Academic Exchange
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作者 Fei-Yue Wang 《IEEE/CAA Journal of Automatica Sinica》 2025年第5期839-840,共2页
The passing of Professor Wolter“Wolt”Fabrycky,an outstanding member and great leader,is a big loss to our international systems engineering professional community.“Wolt was a legend in the systems engineering commu... The passing of Professor Wolter“Wolt”Fabrycky,an outstanding member and great leader,is a big loss to our international systems engineering professional community.“Wolt was a legend in the systems engineering community with his teaching,advising,and dissemination of knowledge through the books he authored.”,as stated by Professor Eileen Aken,a former student of Wolt and the head of the Virginia Tech’s Grado Department of Industrial and Systems Engineeirng where Wolt had served and led for 30 years and retired as John L.Lawrence Professor emeritus. 展开更多
关键词 dissemination knowledge academic exchange international community industrial systems engineeirng systems engineering knowledge dissemination LEADERSHIP
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Occurrence of ionospheric scintillation during geomagnetic storms in Indonesia(2003-2024)using superposed epoch analysis
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作者 Angga Yolanda Putra Theodosius Marwan Irnaka +5 位作者 Prayitno Abadi La Ode Muhammad Musafar Kilowasid Fitri Nuraeni Erlansyah Suraina Afif Rakhman 《Earth and Planetary Physics》 2025年第4期966-979,共14页
Ionospheric scintillation refers to rapid radio signal amplitude and phase fluctuations due to small-scale irregularities in the ionosphere.Occurring primarily at equatorial and low latitudes,scintillation is linked t... Ionospheric scintillation refers to rapid radio signal amplitude and phase fluctuations due to small-scale irregularities in the ionosphere.Occurring primarily at equatorial and low latitudes,scintillation is linked to equatorial plasma bubbles(EPBs),regions of depleted plasma density that form after sunset.Ionospheric scintillation typically occurs from post-sunset hours until midnight.Post-sunset EPBs can be enhanced or suppressed during geomagnetic storms,depending on local sunset timing and how it relates to the storm's main or recovery phases.This study analyzes ionospheric scintillation in Indonesia,located at low geomagnetic and geographic latitudes,during geomagnetic events from 2003 to 2024.Using the S4 index,scintillation was examined with data from seven observation stations during geomagnetic storm events.Geomagnetic activity was evaluated using Dst,SYM-H,and AE indices,employing Superposed Epoch Analysis(SEA)to assess scintillation occurrence linked to minimum SYM-H,defined as epoch 0 to represent the storm peak or the onset of recovery phase in each event.The analysis categorized geomagnetic storms into weak-moderate(–100 nT<min.Dst≤–30 nT)and strong(min.Dst≤–100 nT),and examined their dependence on the local time of minimum SYM-H.Results indicate that scintillation first appears~6 hours after epoch 0 in weak-moderate geomagnetic storms,and~12 hours after epoch 0 in strong geomagnetic storms.The average AE index returns to its baseline value(quiet condition)~6 and~12 hours after epoch 0 for weak-moderate and strong geomagnetic storms,respectively.Further analysis based on the classification of the local time of epoch 0 shows that scintillation occurrence is not observed in post-sunset hours when epoch 0 falls between 16:00 and 19:00 LT for weak-moderate geomagnetic storms.In strong geomagnetic storms,scintillation occurrence during post-sunset hours is absent when epoch 0 is between 10:00 and 19:00 LT.Notably,when the minimum SYM-H(epoch 0)nearly coincides with local sunset,scintillation activity occurs around sunset in both weak-moderate and strong geomagnetic storms.Furthermore,when epoch 0 falls within midnight until early morning,scintillation can be generated in the post-sunset hours before epoch 0.Still,post-midnight scintillation is not observed in the equatorial region during the recovery phase of either weak-moderate and strong storm events.Our findings show that when sunset falls before or coincide with epoch 0,the likelihood of post-sunset EPB and scintillation increases,due to the prompt-penetration electric field(PPEF)in the main phase of storm.The disturbance dynamo electric field(DDEF)in the recovery phase driven by equatorward winds from auroral Joule heating operates for at least 6-and 12-hours post-epoch 0 in the cases of weak-moderate and strong geomagnetic storms,respectively.When the local sunset falls within these operational DDEF periods,post-sunset EPBs will likely be suppressed,inhibiting ionospheric scintillation during post-sunset hours.Finally,this study provides essential information for developing more accurate ionospheric scintillation prediction models in space weather services in equatorial regions. 展开更多
关键词 geomagnetic storm ionospheric scintillation superposed epoch analysis AE index local time of minimum SYM-H DDEF
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Enhancing Pulmonary Embolism Risk Assessment with an Improved Evolutionary Machine Learning Approach
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作者 Shuai Liu Yining Liu +2 位作者 Yangjing Lin Huiling Chen Yingying Zhang 《Journal of Bionic Engineering》 2025年第6期3226-3243,共18页
Pulmonary embolism(PE)can range from minor,asymptomatic blood clots to life-threatening emboli capable of obstructing pulmonary arteries,potentially leading to cardiac arrest and fatal outcomes.Due to this significant... Pulmonary embolism(PE)can range from minor,asymptomatic blood clots to life-threatening emboli capable of obstructing pulmonary arteries,potentially leading to cardiac arrest and fatal outcomes.Due to this significant mortality risk,risk stratification is essential following PE diagnosis to guide appropriate therapeutic intervention.This study proposes a machine learning-based methodology for PE risk stratification,utilizing clinical data from a cohort of 139 patients.The predictive framework integrates an enhanced binary Honey Badger Algorithm(BCCHBA)with the K-Nearest Neighbor(KNN)classifier.To comprehensively evaluate the performance of the core optimization algorithm(CCHBA),a series of benchmark function tests were conducted.Furthermore,diagnostic validation tests were performed using real-world PE patient data collected from medical facilities,demonstrating the clinical significance and practical utility of the BCCHBA-KNN system.Analysis revealed the critical importance of specific indicators,including neutrophil percentage(NEUT%),systolic blood pressure(SBP),oxygen saturation(SaO2%),white blood cell count(WBC),and syncope.The classification results demonstrated exceptional performance,with the prediction model achieving 100%sensitivity and 99.09%accuracy.This approach holds promise as a novel and accurate method for assessing PE severity. 展开更多
关键词 Disease diagnosis Feature selection K-Nearest neighbor Machine learning Pulmonary embolism Swarm intelligence
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