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Optimal Controller Design for Non-Affine Nonlinear Power Systems with Static Var Compensators for Hybrid UAVs

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Tsinghua Science and Technology 2022年第1期27卷 196-206页

作者： Yanchu Li qingqing ding Shufang Li Stanimir Valtchev Beijing Key Laboratory of Network System Architecture and Convergence Beijing Laboratory of Advanced Information Networkand School of Information&Communication EngineeringBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Control and Simulation of Power System and Generation Equipments Tsinghua UniversityBeijing 100084China the Nova School of Science and Technology(FCT/UNL) Caparica 2829-516LisbonPortugal Technical University of Sofia(TUS) Sofia 2125Bulgaria

A generalized non-affine nonlinear power system model is presented for a single machine bus power system with a Static Var Compensator(SVC)or State Var System(SVS)for hybrid Unmanned Aerial Vehicles(UAVs).The model is constructed by differential algebraic equations on the MATLAB-Simulink platform with the programming technique of its *** the inverse system method and the Linear Quadratic Regulation(LQR),an optimized SVC controller is *** simulations under three fault conditions show that the proposed controller can effectively improve the power system transient performance.

关键词： Static Var Compensator(SVC) Unmanned Aerial Vehicles(UAV) power system non-affine nonlinear control inverse system method Linear Quadratic Regulation(LQR)

内镜下金属钛夹联合垂体后叶素治疗上消化道出血的效果观察

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中国实用医刊 2024年第9期51卷 17-20页

作者：屈冰丁清清徐鹏张麒郑州大学第一附属医院胃肠外科一病区(疝和腹壁外科) 郑州450000

目的探讨内镜下金属钛夹止血联合垂体后叶素治疗上消化道出血(UGB)的临床效果。方法回顾性抽取2020年6月至2022年6月郑州大学第一附属医院收治的UGB患者114例,依据止血方案分为联合组(55例,给予内镜下金属钛夹联合垂体后叶素治疗)和对照... 详细信息

目的探讨内镜下金属钛夹止血联合垂体后叶素治疗上消化道出血(UGB)的临床效果。方法回顾性抽取2020年6月至2022年6月郑州大学第一附属医院收治的UGB患者114例,依据止血方案分为联合组(55例,给予内镜下金属钛夹联合垂体后叶素治疗)和对照组(59例,给予垂体后叶素治疗)。比较两组治疗3 d后临床疗效、康复情况、血清炎性因子[C反应蛋白(CRP)、白细胞介素-1β(IL-1β)、白细胞介素-8(L-8)]水平、血小板功能[膜糖蛋白Ⅱb/Ⅲa(GPⅡb/Ⅲa)及溶酶体膜糖蛋白CD62P、CD63]、住院期间并发症发生情况。结果治疗3 d后,联合组总有效率(96.36%,53/55)高于对照组(81.36%,48/59),P0.05)。结论内镜下金属钛夹止联合垂体后叶素治疗UGB效果明显,能减轻炎症反应,改善血小板功能,缩短止血时间,且安全性较高。

关键词：消化道出血金属钛夹垂体后叶素血小板功能

一期逆行输尿管软镜碎石术与经皮肾镜取石术治疗肾结石患者的效果

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河南医学研究 2024年第10期33卷 1765-1769页

作者：王爱花赵苏楠丁子钰丁清清郑州大学第一附属医院泌尿外科河南郑州450000

目的一期逆行输尿管软镜碎石术(FURL)与经皮肾镜取石术(PCNL)治疗肾结石(KS)患者的效果。方法回顾性收集郑州大学第一附属医院2022年3月至2023年3月收治的98例KS患者病例资料,按手术方案不同分两组。以接受一期逆行FURL治疗的49例患... 详细信息

目的一期逆行输尿管软镜碎石术(FURL)与经皮肾镜取石术(PCNL)治疗肾结石(KS)患者的效果。方法回顾性收集郑州大学第一附属医院2022年3月至2023年3月收治的98例KS患者病例资料,按手术方案不同分两组。以接受一期逆行FURL治疗的49例患者列为观察组,以接受PCNL治疗的49例患者列为对照组。对比两组围手术期指标、术前和术后2 d肾功能[血尿素氮(BUN)、尿肾损伤分子-1(KIM-1)、血肌酐(Scr)]、炎症因子[白细胞介素-1(IL-1)、IL-10、C反应蛋白(CRP)]、应激指标[皮质醇(Cor)、促肾上腺皮质激素(ACTH)、去甲肾上腺素(NE)]水平、结石清除率、并发症发生率。结果与对照组对比,观察组术中出血量更少,手术耗时、住院用时更短(P0.05);观察组并发症发生率[2.04%(1/49)]较对照组[16.33%(8/49)]低(P<0.05)。结论一期逆行FURL与PCNL治疗KS患者在结石清除效果相当,但前者能进一步减少术中出血量,缩短手术耗时及住院用时,降低并发症发生风险,同时术后应激及炎症反应更小,对肾功能损伤更轻微。

关键词：一期逆行输尿管软镜碎石术肾结石应激反应经皮肾镜取石术术中出血量

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女性压力性尿失禁病人心理资本现况及影响因素分析

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安徽医药 2024年第3期28卷 495-499页

作者：丁子钰丁清清王爱花刘会范郑州大学第一附属医院泌尿外科河南郑州450052

目的调查女性压力性尿失禁病人心理资本现状及其影响因素。方法 2021年6—12月便利抽取郑州市王立砦社区、陇海社区、侯寨社区的528例女性压力性尿失禁病人,使用一般资料问卷、心理资本问卷(PCQ-24)、社会支持评定量表(SSRS)进行调查... 详细信息

目的调查女性压力性尿失禁病人心理资本现状及其影响因素。方法 2021年6—12月便利抽取郑州市王立砦社区、陇海社区、侯寨社区的528例女性压力性尿失禁病人,使用一般资料问卷、心理资本问卷(PCQ-24)、社会支持评定量表(SSRS)进行调查。结果女性压力性尿失禁病人心理资本总分为(120.51±7.58)分,多元线性回归分析显示,年龄、学历、漏尿次数、疾病严重程度、社会支持程度、认为漏尿不需要就诊是影响女性压力性尿失禁病人心理资本水平的主要因素(P<0.05)。结论女性压力性尿失禁病人的心理资本问题亟待重视,医护人员应先评估病人的心理水平,重视失禁症状的健康宣教,为病人提供心理资本在各个维度上的针对性护理干预,提高其心理资本水平。

关键词：尿失禁,压力性女性心理资本社会支持影响因素

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混合现实技术在青少年神经源性膀胱患者健康教育中的应用

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护理学杂志 2024年第1期39卷 1-5页

作者：吴卓葳丁清清王庆伟文建国徐光立邵尚文刘会范郑州大学第一附属医院泌尿外科河南郑州450052 河南省小儿尿动力国际联合实验室郑州大学第一附属医院教育处

目的探讨基于混合现实技术的液体管理健康教育在青少年神经源性膀胱患者中的应用效果。方法将80例青少年神经源性膀胱患者随机分为干预组和对照组各40例。对照组使用宣教册进行常规液体管理健康教育,干预组采用混合现实技术进行液体管... 详细信息

目的探讨基于混合现实技术的液体管理健康教育在青少年神经源性膀胱患者中的应用效果。方法将80例青少年神经源性膀胱患者随机分为干预组和对照组各40例。对照组使用宣教册进行常规液体管理健康教育,干预组采用混合现实技术进行液体管理健康教育。比较两组液体管理依从性、自我管理水平、出院后2个月内泌尿系感染发生率及患者监护人满意度。结果干预后,干预组液体管理依从性、自我管理得分及患者监护人满意度显著高于对照组(均P0.05)。结论基于混合现实技术的健康教育有助于改善青少年神经源性膀胱患者健康相关行为和提高监护人的满意度,相对减少出院2个月内泌尿系感染。

关键词：青少年神经源性膀胱混合现实技术液体管理健康教育依从性自我管理

Dynamic tracking of exsolved PdPt alloy/perovskite catalyst for efficient lean methane oxidation

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Chinese Chemical Letters 2024年第4期35卷 170-175页

作者： Yanling Yang Zhenfa ding Huimin Wang Jianhui Li Yanping Zheng Hongquan Guo Li Zhang Bing Yang qingqing Gu Haifeng Xiong Yifei Sun College of Energy Xiamen UniversityXiamen 361005China School of Environment and Civil Engineering Dongguan University of TechnologyDongguan 523808China Department of Chemistry College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM) Xiamen 361102China

Supported Pd based catalysts are considered as the efficient candidates for low-carbon alkane oxidation for their outstanding capability to break C-H bond. Whereas, the irreversible deactivation of Pd based catalysts was still frequently observed. Herein, we reinforced the extruded Pd nanoparticles with quantitive Pt to assemble the evenly distributed Pd Pt nanoalloy onto ferrite perovskite(Pd Pt-LCF) matrix with strengthened robustness of metal/oxide support interface. We further co-achieved the enhanced performance, anti-overoxidation as well as resistance of vapor-poisoning in durability measurement. The operando X-ray photoelectron spectroscopy(O-XPS) combined with various morphology characterizations confirms that the accumulation of surface deep-oxidation species of Pd^(4+) is the culprit for fast activity loss in exsolved Pd system, especially at high temperature of 400 ℃. Conversely, it could be completely suppressed by in-situ alloying Pd with equal amount of Pt, which helps maintain the metastable Pd^(2+)/Pd shell and metallic solid-solution core structure. The density function theory(DFT) calculations further buttress that the dissociation of C–H was facilitated on alloy/perovskite interface which is, on the contrary, resistant toward O–H bond cleavage, as compared to Pd/perovskite. Our work suggests that the modification of exsolved metal/oxide catalytic interface could further enrich the toolkit of heterogeneous catalyst design.

关键词： Exsolution PdPt alloy Operando characterization Methane conversion Deep-oxidation

Atomic-scale mechanism of the θ’’→θ’ phase transformation in Al-Cu alloys

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Journal of Materials Science & Technology 2017年第10期33卷 1159-1164页

作者： Zhenju Shen qingqing ding Chunhui Liu Jiangwei Wang He Tian Jixue Li Ze Zhang Center of Electron Microscopy Zhejiang University Hangzhou 310027 China Center for High-Resolution Electron Microscopy College of Materials Science and Engineering Hunan University Changsha 410082 China State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

The phase transformation of θ’’→θ’ in an Al-5.7 Cu alloy was investigated by aberration-corrected scanning transmission electron microscopy, and the tranformation mode of θ’’→θ’ during aging treatment was clarified. In the presence of the θ’ phases, θ’ was found to be formed by in-situ transformation fromθ’’ with the same plate shape, size and broad faces. The transformation starts from multiple sites within the θ’ precipitate and the whole θ’ phase finally forms as the preferential θ’ sections grow and connect with each other. Antiphase domain boundaries are also found in some θ’ precipitates when the disregistry exists between different θ’ sections.

关键词： Al-Cu alloy θ’ phase Phase transformation Antiphase domains High-angle annular dark field(HAADF)

Inconsistent creep between dendrite core and interdendritic region under different degrees of elemental inhomogeneity in nickel-based single crystal superalloys

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Journal of Materials Science & Technology 2021年第33期92卷 88-97页

作者： Wanshun Xia Xinbao Zhao Liang Yue Quanzhao Yue Jiangwei Wang qingqing ding Hongbin Bei Ze Zhang Institute of Superalloys Science and Technology School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Zhejiang Univ Ctr Electron MicroscopyHangzhou 310027China

The creep inconsistency between dendrite core and interdendritic region is investigated in a nickel-based single crystal superalloy under 1373 K and 137 *** specimens with higher and lower degree of elemental inhomogeneity on dendritic structures are *** specimen with higher inhomogeneity,stronger segregation of refractory elements reinforces the local strength in dendrite core,but damages the strength in interdendritic *** strain is accumulated faster in interdendritic region giving rise to promoted dislocation shearing inγphase,faster degradation of dislocation networks and facilitated topological inversion of rated *** the segregation of refractory elements produces a high density of topologically close-packed(TCP)phase in dendrite core,faster accumulation of creep strain forms microcracks prior in interdendritic region that gives rise to final rupture of the *** another specimen,increased solid solution time gives rise to overall reduced *** inconsistency is relieved to show more uniform evolution of dislocation substructures and rafting between dendrite core and interdendritic *** second specimen is ruptured by formation and extension of microcracks along TCP phase although the precipitation of TCP phase is relatively restricted under reduced ***,the balance of local strength between dendrite core and interdendritic region results in over 40%increase of creep rupture life of the second specimen.

关键词： Nickel-based single crystal superalloys Dendritic structure Inhomogeneity Creep Rafting Dislocation networks

Electrical properties of fly ash and its decarbonization by electrostatic separation

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International Journal of Mining Science and Technology 2015年第4期25卷 629-633页

作者： Tao Youjun ding qingqing Deng Mingrui Tao Dongping Wang Xu Zhang Jie School of Chemical Engineering and Technology China University of Mining & Technology Tangshan Branch Tiandi Science & Technology Co. Ltd.

The basic principle of fly ash triboelectrification is analysed. The mineral electrical index and test method are introduced. The electric difference of different mineral composition of fly ash is discussed by analysis of chemical and mineral composition of fly ash in Xinwen power plant. The dielectric constant and charge–mass ratio of carbon and ash of fly ash are tested. Combined with the experimental study on rotary triboelectrostatic separation, the charged characteristic of fly ash particles with different size is gained. The results show that the dielectric constant of fly ash with different grain size decreased with the decrease of particle size, which lead to the poor electrical conductivity. Thus it can be seen that particle size plays a leading role in conductivity. The charge of carbon and ash with each size increased with the decreased of particle size; and the charge–mass ratio between carbon and ash with the same size larger with the decrease of size, which indicated that the finer particle size, the more favorable for triboelectrification separation. In the same conditions, the best decarburization effect is realized when the particle size ranges from 0.038 to 0.074 mm, whose decarbonization rate and efficiency index reached 38.93% and120.83% respectively.

关键词：电厂粉煤灰脱碳速度静电分离电气性能矿物成分晶粒尺寸测试方法介电常数