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Almost Disturbance Decoupling for HOFA Nonlinear Systems with Strict-Feedback Form

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Journal of Systems Science & Complexity 2022年第2期35卷 481-501页

作者： WANG Na LIU Xiaoping LIU Cungen WANG Huanqing zhou yucheng School of Information and Electrical Engineering Shandong Jianzhu UniversityJinan 250101China Faculty of Engineering Lakehead UniversityThunder BayON P7B 5E1Canada The Department of Mathematics Bohai UniversityJinzhou 121013China

The article is devoted to the almost disturbance decoupling problem for high-order fully actuated(HOFA)nonlinear systems with strict-feedback *** the full-actuation feature of high-order fully actuated systems and Lyapunov stability theory,a state feedback control law and virtual control laws are *** unknown disturbances are handled by almost disturbance decoupling(ADD)***,the effectiveness of the control strategy is verified by stability analysis and simulation.

关键词： Almost disturbance decoupling high-order fully actuated systems strict-feedback systems

Propagation of large-scale solar wind events in the outer heliosphere from a numerical MHD simulation

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Earth and Planetary Physics 2021年第3期5卷 223-231页

作者： XiaoCheng Guo yucheng zhou Chi Wang Ying DLiu State Key Laboratory of Space Weather National Space Science CenterChinese Academy of ScienceBeijing 100190China College of Earth and Planetary Sciences University of Chinese Academy of SciencesChinese Academy of ScienceBeijing 100049China

Voyager 1 occasionally detected sudden jumps of the local interstellar magnetic field strength since its heliopause crossing in August *** events were believed to be associated with outward propagating solar wind shocks originating in the inner *** we investigate the correlation between interstellar shocks and large-scale solar wind events by means of numerical MHD *** solar wind is simplified as a symmetric flow near the equatorial plane,and the interstellar neutrals are treated as a constant flow with a fixed density distribution along the upwind direction of the local interstellar *** charge exchanges between the solar wind plasma and the interstellar neutrals are taken into *** a heliocentric distance of 1 AU,the solar wind data from OMNI,STEREO A and B during the period between 2010 and 2017 are used as the inner boundary conditions to drive the *** simulation results showed that the solar wind gradually merges into large-scale structures as the radial distance increases,consistent with observations by New *** propagating into the inner heliosheath,the shocks are fully developed and the corresponding pressure pulses roughly agree with the observations by Voyager 2 in the inner *** arrival of the shocks beyond the heliopause is estimated and found to be consistent with the observed signatures of interstellar shocks by Voyager *** possible origins of interstellar shocks in the inner heliosheath are discussed based on the simulation.

关键词： MHD outer heliosphere solar wind interstellar medium shocks Voyager

Reversibly sensitizing-storing-releasing ^(1)O_(2) within a single platinum(Ⅱ)-acetylide-based metallacycle molecule via laser power modulation

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Science China Chemistry 2024年第2期67卷 604-611页

作者： Ruyi zhou Wen Lv Bo Li Bo Yu Sudi Zhang yucheng zhou Shujuan Liu Qiang Zhao State Key Laboratory of Organic Electronics and Information Displays&Jiangsu Key Laboratory for Biosensors Institute of Advanced Materials(IAM)&Institute of Flexible Electronics(Future Technology)Nanjing University of Posts and Telecommunications(NUPT)Nanjing210023China College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and DevicesNanjing University of Posts and Telecommunications(NUPT)Nanjing210023China

Tumor hypoxia severely limits the therapeutic efficacy of photodynamic therapy(PDT) for solid tumors,which is highly dependent on tissue oxygen *** this study,we developed a platinum(Ⅱ)-acetylide-based metallacycle compound bearing six 1,4-dimethylnaphthalenes(DMN) groups,and controlled the photodynamic and photothermal effects of the compound by adjusting the power of 730 nm laser to achieve reversible sensitization,storage and release of 1~O_(2) within a single *** compound formed nanoparticles by self-assembly and exhibited good water solubility and *** laser irradiation,the strong spin-orbit coupling of platinum atoms in the metallacycle facilitated 1~O_(2) *** produced 1~O_(2) was captured by the DMN carriers and transported into the hypoxic tumor,where 1~O_(2) release was triggered owing to the good photothermal effect of the extended conjugation of the *** therapy,the metallacycle serving as a photosensitizer,1~O_(2) carrier,and photothermal reagent,achieved the synergistic therapy of PDT/PTT,demonstrating the versatility of the *** study proposes a new strategy to develop phototherapy agents that are suitable for hypoxic tumors.

关键词： metallacycles singlet oxygen endoperoxides near-infrared absorption synergistic treatment

Corrosion Behavior of Steel Fibers in Reactive Powder Concrete with High Volume of Mineral Admixtures

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Journal of Wuhan University of Technology(Materials Science) 2020年第3期35卷 541-550页

作者： YANG Haitao LIU Juanhong XUE Yanpeng zhou yucheng JI Hongguang College of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Beijing Key Labo-ratory of Urban Underground Space Engineering University of Science and Technology BeijingBeijing 100083China State Key Lab-oratory of High-efficient Mining and Safety of Metal Mines Ministry of EducationUniversity of Science and Technology BeijingBeijing 100083China National Center for Materials Service Safety University of Science and Technology BeijingBeijing 100083China

The corrosion behavior and the effects of temperature on critical chloride content (Ccrit) of steel fibers in RPC were analyzed by a pH meter, ion chromatography, mercury intrusion porosimetry (MIP), and electrochemical techniques. It was found that the suspension pH value, the chloride binding capacity, and the total porosity of RPC were lower than those of high-performance concrete (HPC). The pore structure of RPC mainly consisted of gel pores. The Ccrit values of steel fibers in RPC and HPC at 20 ℃ were 1% and 2%, respectively. When the temperature reached 50 ℃, the Ccrit value of steel fibers in HPC decreased significantly, whereas it remained unchanged in RPC. The corrosion rate of corroded fibers in both RPC and HPC started to decrease with the rise in temperature.

关键词： corrosion steel fibers chloride reactive powder concrete critical chloride content

Research on Rosewood Micro Image Classification Method Based on Feature Fusion and ELM

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Journal of Renewable Materials 2022年第12期10卷 3587-3598页

作者： Xiaoxia Yang Yisheng Gao Shuhua Zhang Zhedong Ge yucheng zhou School of Information and Electrical Engineering Shandong Jianzhu UniversityJinan250101China School of Architecture and Urban Planning Shandong Jianzhu UniversityJinan250101China

Rosewood is a kind of high-quality and precious wood in *** correct identification of rosewood species is of great significance to the import and export trade and species identification of furniture *** this paper,micro CT was used to obtain the micro images of CTOSS sections,radial sections and tangential sections of 24 kinds of rosewood,and the data sets were *** method was used to reduce the dimension of four features including logical binary pattern,local configuration pattern,rotation invariant LBP,uniform *** four fea-tures and one feature not reducing dimension(rotation invariant uniform LBP)was fused with Gray Level Co-Occurrence Matrix and Tamura features,respectively,a total of five fused features LBP+GLCM+Tamura,LCP+GLCM+Tamura,LBP_(P,R)^(u2)+GLCM+Tamura,LBP_(P,R)^(ri)+GLCM+Tamura and LBP_(P,R)^(riu2)+GLCM+Tamura were *** five fused features were classified by extreme learning machine and BP neural *** clas-sification effect of feature LBP_(P,R)^(u2)+GLCM+Tamura combined with extreme learning machine was the best,and the classification accuracy of CroSS,radial and tangential sections reached 100%,97.63%and 94.72%,respectively,which is 0.83%,2.77%and 5.70%higher than that of BP neural *** classification running time of ELM is less than 1 s,and the classfcation eficiency is *** condusion,the LBP_(P,R)^(u2)+GLCM+Tamura method com-bined with extreme learning machine can be used as a quick and acurate classifier,providing an efficient and feasible class ification method of rosewood.

关键词： Rosewood micro CT feature fusion ELM BP neural network

Applications of Wide Bandgap Semiconductor Materials in High-Power Electronic Devices

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World Journal of Engineering and Technology 2024年第4期12卷 1034-1045页

作者： yucheng zhou Cardiff and Vale College Changzhou Changzhou China

Wide bandgap semiconductor materials are driving revolutionary improvements in the performance of high-power electronic devices. This study systematically evaluates the application prospects of wide bandgap semiconductor materials in high-power electronic devices. The research first compares the physical properties of major wide bandgap materials (such as silicon carbide SiC and gallium nitride GaN), analyzing their advantages over traditional silicon materials. Through theoretical calculations and experimental data analysis, the study assesses the performance of these materials in terms of high breakdown field, high thermal conductivity, and high electron saturation velocity. The research focuses on the application of SiC and GaN devices in power electronics, including high-voltage DC transmission, electric vehicle drive systems, and renewable energy conversion. The study also discusses the potential of wide bandgap materials in RF and microwave applications. However, the research also points out the challenges faced by wide bandgap semiconductor technology, such as material defect control, device reliability, and cost issues. To address these challenges, the study proposes solutions, including improving epitaxial growth techniques, optimizing device structure design, and developing new packaging methods. Finally, the research looks ahead to the prospects of wide bandgap semiconductors in emerging application areas such as quantum computing and terahertz communications. This study provides a comprehensive theoretical foundation and technology roadmap for the application of wide bandgap semiconductor materials in high-power electronic devices, contributing to the development of next-generation high-efficiency energy conversion and management systems.

关键词： Wide Bandgap Semiconductors High-Power Electronics Silicon Carbide Gallium Nitride Power Electronics

Laparoscopic versus open pancreaticoduodenectomy for pancreatic ductal adenocarcinoma:a propensity score matching analysis

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Cancer Communications 2019年第1期39卷 582-592页

作者： Wentao zhou Weiwei Jin Dansong Wang Chao Lu Xuefeng Xu Renchao Zhang Tiantao Kuang yucheng zhou Wenchuan Wu Dayong Jin Yiping Mou Wenhui Lou Department of General Surgery Zhongshan HospitalFudan University180 Fenglin RoadXuhui DistrictShanghai 200032P.R.China Department of Gastrointestinal and Pancreatic Surgery Zhejiang Provincial People’s HospitalKey Laboratory of Gastroenterology of Zhejiang ProvincePeople’s Hospital of Hangzhou Medical College158 Shangtang RoadHangzhou 310014ZhejiangP.R.China

Background:A growing body of evidence supports the use of laparoscopic pancreaticoduodenectomy(LPD)as an efficient and feasible surgical ***,few studies have investigated its applicability in pancreatic ductal adenocarcinoma(PDAC),and the long-term efficacy of LPD on PDAC remains *** study aimed to compare the short-and long-term outcomes between LPD and open pancreaticoduodenectomy(OPD)for ***:The data of patients who had OPD or LPD for PDAC between January 2013 and September 2017 were *** postoperative outcomes and survival were compared after propensity score ***:A total of 309 patients were *** a 2:1 matching,93 cases in the OPD group and 55 in the LPD group were *** gastric emptying(DGE),particularly grade B/C DGE,occurred less frequently in the LPD group than in the OPD group(1.8%vs.36.6%,P<0.001;1.8%vs.22.6%,P=0.001).The overall complication rates were significantly lower in the LPD group than in the OPD group(49.1%vs.71.0%,P=0.008),whereas the rates of major complications were similar(10.9%vs.14.0%,P=0.590).In addition,the median overall survival was comparable between the two groups(20.0 vs.18.7 months,P=0.293).Conclusion:LPD was found to be technically feasible with efficacy similar to OPD for patients with PDAC.

关键词： Laparoscopy Open pancreaticoduodenectomy Pancreatic cancer Overall survival Gastric emptying Complications Adjuvant chemotherapy Propensity score matching

Mink Circovirus Can Infect Minks, Foxes and Raccoon Dogs

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Virologica Sinica 2018年第6期33卷 561-564页

作者： Yanling Yang Yuening Cheng Nan Li Shipeng Cheng Li Guo yucheng zhou Haiwei Zhang Xinyuan Zhang Linzhu Ren State Key Laboratory for Molecular Biology of Special Economic Animals Institute of Special Wild Economic Animals and PlantsChinese Academy of Agricultural SciencesChangchun 130112China Jilin Provincial Key Laboratory of Animal Embryo Engineering College of Animal SciencesJilin UniversityChangchun 130112China Key Laboratory of Jilin Province for Zoonosis Prevention and Control Military Veterinary InstituteAcademy of Military Medical SciencesChangchun 130062China

Dear Editor,Mink circovirus (MiCV), which is clustered in the genus Circovirus of the family Circoviridae, was first described in minks from farms in Dalian, China in 2013 (Lian et al.2014). The complete single-stranded circular genome of the virus is 1,753 nucleotides long and contains two major open reading frames (ORFs), designated ORF1 (Rep gene)and ORF2 (Cap gene)(Lian et al. 2014;Ge et al. 2018).

关键词： PCV Foxes and Raccoon Dogs Mink Circovirus Can Infect Minks

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实木地采暖地板蓄热性能检测技术

林业科学 2018年第11期54卷 7-13页

作者：杜光月周世玉刘大伟周玉成山东建筑大学信息与电气工程学院济南250101 山东建筑大学热能工程学院济南250101

【目的】提出一种基于密闭绝热腔体的实木地采暖地板蓄热性能检测方法,并开发采暖地板蓄热性能检测装置,为我国地采暖地板行业产品标准化提供借鉴。【方法】将密闭绝热腔体空间均匀分成L×M×N个小的空间区域,每个小空间内安装温度传感... 详细信息

【目的】提出一种基于密闭绝热腔体的实木地采暖地板蓄热性能检测方法,并开发采暖地板蓄热性能检测装置,为我国地采暖地板行业产品标准化提供借鉴。【方法】将密闭绝热腔体空间均匀分成L×M×N个小的空间区域,每个小空间内安装温度传感器。将加热到一定温度T_e的实木板材试件置于初始温度为T_0(T_e>T_0)的密闭绝热腔体中作为热源向外释放热量。当达到平衡状态后,通过传感器检测每个小空间的温度,根据前后变化的温度差、每个小空间的体积及空气比热容计算试件释放热量前后每个小空间内空气所吸收的热量。对每个小空间内空气吸收的热量进行累加,得出试件释放出的总热量,根据热量与质量比值,计算实木板材在该工况条件下的蓄热性能。【结果】在密闭绝热腔体初始温度20℃、试件温度70℃的工况条件下,对水曲柳、红松和白栎树种地采暖地板分别经过10次测试,得出3种实木地采暖地板的蓄热性能分别为105.70、106.27和101.99 J·℃^(-1)。【结论】基于对实木地采暖地板蓄热性能的检测方法及开发的检测装置,通过对3个树种地采暖地板蓄热性能的多次检测,检测数据方差均小于1.00,表明检测数据较为稳定,能够准确检测出某类树种采暖地板的蓄热性能参数并评价该类地板的蓄热性能。本研究提出的地采暖地板蓄热性能检测方法及开发的检测装置,可为行业或国家标准的建立提供分析方法与仪器,对我国地采暖地板行业产品标准化具有重要意义。

关键词：地采暖地板蓄热性能检测方法检测装置密闭绝热腔体