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Novel high-safety aeroengine performance predictive control method based on adaptive tracking weight

Chinese Journal of Aeronautics 2024年第7期37卷 352-374页

作者： Qian CHEN Hanlin SHENG Jie ZHANG jiacheng li College of Energy and Power Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Automation Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Increasing attention has been attracted to the dynamic performance and safety of advanced performance predictive control systems of the next-generation *** latest research demonstrates that Subspace-based Improved Model Predictive Control(SIMPC)can overcome the difficulty in solving the predictive model in MPC/NMPC ***,applying constant design parameters cannot maintain consistent control effects in all ***,the designed system relies too much on sensor-measured data,and thus it is difficult to thoroughly validate the safety of the system because of its high *** means that any potential hardware/software faults will endanger the ***,this paper first presents a novel nonlinear mapping relationship to adaptively tune the tracking weight online with the change of Power Lever Angle(PLA)and real-time relative tracking ***,without introducing additional design parameters,an Adaptive Tracking Weight-based SIMPC(ATW-SIMPC)controller is designed to improve the control performance in all operating states ***,a Primary/Backup Hybrid Control(PBHC)strategy with the ATW-SIMPC controller as the primary system and the traditional speed(Nf)controller as the backup system is proposed to ensure *** designed affiliated switching controller and the real-time monitor therein can be used to realize reasonable and smooth switching between primary/backup systems,so as to avoid bump *** PBHC system switches to the Nf controller when the ATW-SIMPC controller is wrong because of potential hardware/software faults;otherwise,the ATW-SIMPC controller keeps acting on the *** main results prove that the ATW-SIMPC controller with the optimal nonlinear mapping relationship,compared with the existing SIMPC controller,uplifts the dynamic control performance by 32%and reduces overshoots to an allowable limit,resulting in a better control effect in full *** comparison results consistently i

关键词： Aeroengine Model predictive control Hybrid system Adaptive weight Safety

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Analyzing the spatiotemporal evolution and driving forces of gross ecosystem product in the upper reaches of the Chaobai River Basin

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Frontiers of Environmental Science & Engineering 2024年第8期18卷 117-132页

作者： jiacheng li Qi Han liqiu Zhang li Feng Guihuan liu Beijing Key Laboratory for Source Control Technology of Water Pollution College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Engineering Research Center for Water Pollution Source Control&Eco-remediation College of Environmental Science and EngineeringBeijing Forestry UniversityBeijing 100083China Center of Eco-compensation Chinese Academy of Environmental PlanningMinistry of Ecology of EnvironmentBeijing 100041China

The Chaobai River Basin,which is a crucial ecological barrier and primary water source area within the Beijing-Tianjin-Hebei region,possesses substantial ecological *** gross ecosystem product(GEP)in the Chaobai River Basin is a reflection of ecosystem conditions and quantifies nature’s contributions to humanity,which provides a basis for basin ecosystem service management and *** study investigated the spatiotemporal evolution of GEP in the upper Chaobai River Basin and explored the driving factors influencing GEP spatial *** patterns from 2005 to 2020 were analyzed,and GEP was calculated for 2005,2010,2015,and *** driving factors influencing GEP spatial differentiation were identified using the optimal parameter-based geographical detector(OPGD)*** key findings are as follows:(1)From 2005 to 2020,the main ecosystem types were forest,grassland,and *** areas experienced significant changes,and conversions mainly occurred among urban,water,grassland and agricultural ecosystems.(2)Temporally,the GEP in the basin increased from 2005 to 2020,with regulation services *** the county(district)scale,GEP exhibited a north-west-high and south-east-low pattern,showing spatial differences between per-unit-area GEP and county(district)GEP,while the spatial variations in per capita GEP and county(district)GEP were similar.(3)Differences in the spatial distribution of GEP were influenced by regional natural geographical and socioeconomic *** these factors,gross domestic product,population density,and land-use degree density contributed *** among different driving forces noticeably impacted GEP spatial *** findings underscore the necessity of incorporating factors such as population density and the intensity of land-use development into ecosystem management decision-making processes in the upper reaches of the Chaobai River *** policies

关键词： Ecosystem pattern Gross ecosystem product(GEP) Spatiotemporal evolution Optimal parameter-based geographical detector(OPGD) Chaobai River Basin

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Molecular Characterization and Antibacterial Activity of a G-Type Lysozyme in Yellow Drum(Nibea albiflora)

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Journal of Ocean University of China 2024年第2期23卷 477-486页

作者： XIAO Yao li jiacheng TIAN Qianqian WU Baolan HAN Fang State Key Laboratory of Mariculture Breeding Fisheries College of Jimei UniversityXiamen 361021China

Lysozyme(EC3.***.1.17)plays an important role in the immune response;as a nonspecific immune factor,it can resist causative *** can be divided into c-type and g-type in *** a previous study,through genome-wide association analysis,the g-type lysozyme gene,which is named NaLyg in yellow drum(Nibea albiflora),was found to be a key candidate gene for disease resistance in response to Vibrio harveyi *** cDNA of NaLyg was 1025 bp,including four exons and three introns,and its open reading frame(ORF)had a full-length of 582 bp,encoding 193 amino *** was found to be conserved during evolution through bioinformatic *** NaLyg protein possessed a sugar binding domain and three catalytic sites,including Glu71,Asp84 and *** qRT-PCR results confirmed that NaLyg gene mRNA was visibly increased after *** *** NaLyg protein purified by prokaryotic expression killed some gram-negative bacterial pathogens by inducing cell wall destruction,including ***,Aeromonas hydrophila and Edwardsiella ***,the NaLyg protein killed two gram-positive bacteria,Bacillus subtilis and Staphylococcus *** together,the experimental results suggested that the NaLyg protein of *** played an important role in fighting bacterial infections.

关键词： Nibea albiflora innate immunity Vibrio harveyi g-type lysozyme antibacterial activity

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Direct reprogramming of fibroblasts into functional hepatocytes via CRISPRa activation of endogenous Gata4 and Foxa3

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Chinese Medical Journal 2024年第11期137卷 1351-1359页

作者： jiacheng li Ruopu li Xue Bai Wenlong Zhang Yu Nie Shengshou Hu State Key Laboratory of Cardiovascular Disease Fuwai Hospital and Cardiovascular InstituteNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Obstetrics and Gynecology Beijing Advanced Innovation Center for GenomicsThird HospitalSchool of Life SciencesPeking UniversityBeijing 100871China

Background:The ability to generate functional hepatocytes without relying on donor liver organs holds significant therapeutic promise in the fields of regenerative medicine and potential liver disease *** regularly interspaced short palindromic repeats(CRISPR)activator(CRISPRa)is a powerful tool that can conveniently and efficiently activate the expression of multiple endogenous genes simultaneously,providing a new strategy for cell fate *** main purpose of this study is to explore the feasibility of applying CRISPRa for hepatocyte reprogramming and its application in the treatment of mouse liver ***:The differentiation of mouse embryonic fibroblasts(MEFs)into functional induced hepatocyte-like cells(iHeps)was achieved by utilizing the CRISPRa synergistic activation mediator(SAM)system,which drove the combined expression of three endogenous transcription factors-Gata4,Foxa3,and Hnf1a-or alternatively,the expression of two transcription factors,Gata4 and *** vivo,we injected adeno-associated virus serotype 6(AAV6)carrying the CRISPRa SAM system into liver fibrotic Col1a1-Cre^(ER);Cas9^(fl/fl)mice,effectively activating the expression of endogenous Gata4 and Foxa3 in *** endogenous transcriptional activation of genes was confirmed using real-time quantitative polymerase chain reaction(RT-qPCR)and RNA-seq,and the morphology and characteristics of the induced hepatocytes were observed through *** level of hepatocyte reprogramming in vivo is detected by immunofluorescence staining,while the improvement of liver fibrosis is evaluated through Sirius red staining,alpha-smooth muscle actin(α-SMA)immunofluorescence staining,and blood alanine aminotransferase(ALT)***:Activation of only two factors,Gata4 and Foxa3,via CRISPRa was sufficient to successfully induce the transformation of MEFs into *** iHeps could be expanded in vitro and displayed functional characteristics similar to th

关键词： liver fibrosis CRISPRa Cell reprogramming Transcriptional activation Hepatocytes

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Isotope constraints on seasonal dynamics of nitrogen in Zhanjiang Bay, a typical mariculture bay in South China

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Acta Oceanologica Sinica 2024年第6期43卷 60-70页

作者： Chunqing Chen Qibin Lao Fajin Chen Guangzhe Jin jiacheng li Qingmei Zhu College of Ocean and Meteorology Guangdong Ocean UniversityZhanjiang 524088China School of Chemistry and Environment Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory for Coastal Ocean Variation and Disaster Prediction Guangdong Ocean UniversityZhanjiang 524088China Key Laboratory of Climate Resources and Environment in Continental Shelf Sea and Deep Sea of Department of Education of Guangdong ProvinceGuangdong Ocean UniversityZhanjiang 524088China

Eutrophication in coastal waters has been increasing remarkably,severely impacting the water quality in mariculture *** this study,we conducted multiple isotopic measurements on suspended particulate nitrogen(δ^(15)N-PN) and dissolved nitrate(δ^(15)N-NO_(3)^(-)and δ^(18)O-NO_(3)^(-)) in Zhanjiang Bay,a typical mariculture bay with a high level of eutrophication in South China,to investigate the changes in nitrogen sources and their cycling between the rainy and dry *** the rainy season,the study found no significant relation between δ^(15)NPN and δ^(15)N-NO_(3)^(-)due to the impact of heavy rainfall and terrestrial *** the upper bay,a slight nitrate loss and slightly higher δ_(15)N-NO_(3)^(-)and δ^(18)O-NO_(3)^(-)values were observed,attributed to intense physical sedimentwater *** some fluctuations,nitrate concentrations in the lower bay mainly aligned with the theoretical mixing line during the rainy season,suggesting that nitrate was primarily influenced by terrestrial erosion and that nitrate isotopes resembled the ***,the isotopic values of nitrate can be used for source apportionment in the rainy *** results indicated that soil nitrogen(36%) and manure and sewage(33%) were the predominant nitrogen sources contributing to nitrogen loads during this *** contrast,the dry season saw a deficient ammonium concentration(ling of assimilation and mineralization during the dry *** active biogeochemical processes during the dry season may be related to decreased runoff and increased water retention ***,our study illustrated the major seasonal nitrogen sources and their dynamics in Zhanjiang B ay,providing valuable insights for formulati

关键词： nitrogen stable nitrogen isotopes biogeochemical processes eutrophication Zhanjiang Bay

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In-situ study of the hydrogen peroxide photoproduction in seawater on carbon dot-based metal-free catalyst under operation condition

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Nano Research 2024年第7期17卷 5956-5964页

作者： Jiaxuan Wang jiacheng li Zenan li Jie Wu Honglin Si Yangbo Wu Zhiyong Guo Xuepeng Wang Fan liao Hui Huang Mingwang Shao Yang liu Zhenhui Kang Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Faculty of Electrical Engineering and Computer Science Ningbo UniversityNingbo 315211China State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products School of Material Science and Chemical EngineeringNingbo UniversityNingbo 315211China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsMacao University of Science and TechnologyTaipa 999078MacaoChina

Hydrogen peroxide(H_(2)O_(2))photoproduction in seawater with metal-free photocatalysts derived from biomass materials is a green,sustainable,and ultra environmentally friendly ***,most photocatalysts are always corroded or poisoned in seawater,resulting in a significantly reduced catalytic ***,we report the metal-free photocatalysts(RUT-1 to RUT-5)with in-situ generated carbon dots(CDs)from biomass materials(Rutin)by a simple microwave-assisted pyrolysis *** visible light(λ≥420 nm,81.6 mW/cm^(2)),the optimized catalyst of RUT-4 is stable and can achieve a high H_(2)O_(2)yield of 330.36μmol/L in seawater,1.78 times higher than that in normal *** transient potential scanning(TPS)tests are developed and operated to in-situ study the H_(2)O_(2)photoproduction of RUT-4 under operation ***-4 has strong oxygen(O_(2))absorption capacity,and the O_(2)reduction rate in seawater is higher than that in *** cations in seawater further promote the photo-charge separation and facilitate the photo-reduction *** RUT-4,the conduction band level under operating conditions only satisfies the requirement of O_(2)reduction but not for hydrogen(H2)*** work provides new insights for the in-situ study of photocatalyst under operation condition,and gives a green and sustainable path for the H_(2)O_(2)photoproduction with metal-free catalysts in seawater.

关键词： carbon dots hydrogen peroxide photocatalysis transient potential scanning in-situ study operation condition

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Study of Axial Force and Deformation of Double-System Composite Guideway Considering Slip and Uplift Effects

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Journal of Traffic and Transportation Engineering(English Edition) 2024年

作者： Zhengwei Bai Eryu Zhu Wenchao Cai Honghe Jian jiacheng li Dept.of Bridge， Beijing Jiaotong University

This study fills the gap in the theoretical research of the interface deformation of the Double-System Composite Guideway (DSCG) in multi-system monorail transportation. By integrating the vertical lifting theory of the combined interface with the three-way deformation theory， this paper established a methodology for the interface analysis of the DSCG. Subsequently， a finite element analysis model of the DSCG was developed using a modified parameter model， enabling the study and summary of the deformation laws of the interface under different vehicle loads. The results show that the modified finite element model reduces the axial force and deformation by approximately 10%. Under vehicle loading， the transverse deformation of the combined interface accounts for 65.26% of the transverse deformation at the bottom of the concrete guideway， the vertical deformation accounts for 27.1%， and the longitudinal deformation accounts for 74.55%. Under the influence of a level 10 vehicle load， the deformation of the combined interface in three directions is uniformly distributed， indicating that the connectors remain in the elastic stage. The conclusions of this paper not only lay a foundation for the research of the DSCG guideway but also promote the development of a multi-standard monorail transit system.

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芬兰终身学习的概念意蕴与治理指向

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比较教育研究 2024年第1期46卷 71-79,89页

作者：李艳李家成江南大学教育学院江苏无锡214122 华东师范大学上海终身教育研究院上海200062

在全球竞争、生态可持续性危机和数字化时代,芬兰改革者坚信“生产”个体能力的最佳方式依赖于终身学习。终身学习的概念意蕴在芬兰被系统性创生,在思想层面,其在人本与功利立场融通作用下指向个体的持续学习和能力建构;在政治层面,终... 详细信息

在全球竞争、生态可持续性危机和数字化时代,芬兰改革者坚信“生产”个体能力的最佳方式依赖于终身学习。终身学习的概念意蕴在芬兰被系统性创生,在思想层面,其在人本与功利立场融通作用下指向个体的持续学习和能力建构;在政治层面,终身学习被整体建构,以高质量的教育体系、保障教育与工作间的灵活过渡来预防社会排斥;在实践层面,强调在学会学习和激发学习动机中应对未来社会提出的挑战。在芬兰,终身学习是一种治理技术,指向个体生命历程管理的“正常化”;学习发展机会提供指向“成人化”;在社会投资战略中指向“职业主义”。此外,芬兰终身学习结构性认知和个体化实践间的张力、作为连接外围和城市中心之间的治理路径及其系统性实践方法,值得深入审思。

关键词：芬兰终身学习持续学习与能力建构职业主义

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中国特色学习型城市评价指标的理路探索——基于对“神庙指标”和“亭子指标”的比较研究

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教育与职业 2024年第15期1063卷 5-13页

作者：李书涵李家成华东师范大学职业教育与成人教育研究所华东师范大学教育学部上海终身教育研究院上海200062

随着理论与实践的深入,优化和完善中国特色学习型城市评价指标已成为我国学习型城市进一步发展的关键议题。立足学习型城市的时代内涵和价值意蕴,通过对联合国教科文组织学习型城市评价指标和中国学习型城市评价指标的文本分析,可以得... 详细信息

随着理论与实践的深入,优化和完善中国特色学习型城市评价指标已成为我国学习型城市进一步发展的关键议题。立足学习型城市的时代内涵和价值意蕴,通过对联合国教科文组织学习型城市评价指标和中国学习型城市评价指标的文本分析,可以得出学习型城市建设的共性特征:一是秉持终身教育学习理念,建构教育体系内外集成网络;二是立足信息时代数字转型,关注弱势群体与社会包容力;三是增强终身学习文化软实力,坚持可持续发展战略目标;四是优化师资队伍,完善学习成果认证,推进建设进程监测。同时,基于对中国学习型城市评价指标中蕴含的个性特征的分析,围绕共享与联通、效率与效益、补弱与强基、对话与创新,对优化和完善中国特色学习型城市评价指标提出了建议与展望,以期为我国学习型城市建设提供理论支撑。

关键词：学习型城市评价指标终身学习中国自主知识体系中国式教育现代化

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计及多类型储能调频容量动态申报的电能量与调频市场联合出清方法研究

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电网技术 2024年第7期48卷 2833-2841,I0057-I0060页

作者：李佳承翟文娟窦迅祝欣宇南京工业大学电气工程与控制科学学院江苏省南京市211816

储能作为当前重要的灵活性调节资源之一,在提高电力系统供电可靠性以及参与辅助服务方面占据重要地位。首先,分析了储能参与电力现货市场机制,厘清了储能参与电能量市场与调频市场的组织形式和定价逻辑;其次,考虑常规机组以及储能运行成... 详细信息

储能作为当前重要的灵活性调节资源之一,在提高电力系统供电可靠性以及参与辅助服务方面占据重要地位。首先,分析了储能参与电力现货市场机制,厘清了储能参与电能量市场与调频市场的组织形式和定价逻辑;其次,考虑常规机组以及储能运行成本,构建了电能量市场预出清模型,并基于电能量市场预出清结果,计算了调频资源的机会成本并考虑多类型储能的荷电状态构建动态调频容量申报边界;然后,以调频总成本最小为优化目标,建立了调频市场出清模型,并在扣除最终确定的机组调频容量后生成电能量市场实时发电计划;最后,通过算例验证了所提联合出清机制的有效性,结果表明所提方法能够降低市场联合出清成本约17000元,从而激励了储能资源参与电网调节,促进了资源优化配置。

关键词：多类型储能调频动态申报电能量市场调频市场联合出清

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