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不确定电液伺服系统的时变输出约束自适应滤波控制

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北京航空航天大学学报 2024年第6期50卷 1819-1828页

作者：潘昌忠何广李智靖周兰熊培银湖南科技大学信息与电气工程学院湘潭411100

针对电液伺服系统位置跟踪控制中存在的输出约束和不确定性问题,提出一种基于正切型时变障碍Lyapunov函数的输出约束自适应滤波控制方法。构造具有时变约束边界的正切型时变障碍Lyapunov函数,通过时变边界函数的参数设置,使系统输出具... 详细信息

针对电液伺服系统位置跟踪控制中存在的输出约束和不确定性问题,提出一种基于正切型时变障碍Lyapunov函数的输出约束自适应滤波控制方法。构造具有时变约束边界的正切型时变障碍Lyapunov函数,通过时变边界函数的参数设置,使系统输出具有较好的瞬态和稳态性能;设计径向基函数(RBF)神经网络及权重自适应学习律,在线逼近由模型不确定性和未知干扰组成的复合干扰,并将逼近值用于反馈控制;采用二阶指令滤波反步法设计状态反馈控制律和误差补偿机制,避免反步设计中“计算爆炸”的问题,同时消除滤波误差,提高系统位置跟踪精度;依据Lyapunov稳定性理论证明闭环系统中所有误差信号的收敛性。仿真结果表明:系统的稳态误差在所提方法下约为3.48×10^(-8)m,相比于其他控制方法,跟踪误差始终约束在时变的约束边界内,跟踪精度和控制性能均得到提升。

关键词：电液伺服系统时变障碍Lyapunov函数径向基函数神经网络指令滤波误差补偿反步法

Geochemical constraints from hydrothermal fluid inclusions of altered deformation zone type Au(Ag)deposits in Yunkai area, south china

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Chinese Science Bulletin 1999年第S2期44卷 230-232页

作者： WANG Zuwei~1, ZHANG Haihua~2. YAO Dongliang~2.and zhou Yongzhang~3 1. Department of geography, Tianjin {2. university, Tianjin 300071, china 2. guangzhou Institute of Geochemistry, Chinese Academy of Sciences, guangzhou 510640, china 3. Department of Earth Sciences, Zhongshan university, guangzhou 5102.5, china eeszhou@*** Department of geography Tianjin Normal University Tianjin 300071 China guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Department of Earth Sciences Zhongshan University Guangzhou 510275 China

THE altered deformation zone type Au (Ag) deposits share an important part from the precious metallicore deposits in the Yunkai area, south china. Their formation is a history of poly-stage evolution. Pre- liminary source strata, Calidoniam metamorphism, Indosinian-Yanshanian ductile shear deformation andassociated hydrotheraml alteration all play certain roles in the history. This note discusses the geochemical conditional of the hydrothermal fluids during mineralization. Two representative ore deposits, the Pangxidong Ag(Au) deposit and Hetai Au deposits are selectedfor this study. They are hosted in altered ductile shear zones. Wall-rock hydrothermal alteration is bothspatially and temporally associated with the development of the ductile shear system. Silicification occurred throughout the whole alteration process. There are three groups of quartz: thepredeformational quartz, the early stage hydrothermal quartz, and the late stage hydrothermal quartz asso-

关键词： precious metallic deposit fluid inclusions mineralizing fluid south china.

Development of simple sequence repeats (SSR) markers of ramie and comparison of SSR and inter-SSR marker systems

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Progress in Natural Science:Materials International 2005年第2期15卷 42-47页

作者： zhou Jianlin1*, JIE Yucheng2., JIANG Yanbo2. ZHONG Yingli1, LIU Yunhai1 and ZHANG Jian1**(1. Department of Biochemistry and Molecular Biology, College of Life Science, Hunan normal {2., Changsha 410081, china 2. Institute of Bast Fiber Crops, Chinese Academy of Agricultural Science, Changsha 410006, china) Dept. of Biochem. and Molecular Biol Coll. of Life Science Hunan Normal Univ. Changsha 410081 China Inst. of Bast Fiber Crops Chinese Acad. of Agric Science Changsha 410006 China

Ramie (Boehmeria nivea L.) is an important bast fiber crop. To study genetic background of this species, we isolated and characterized microsatellite markers of ramie. A genomic library containing inserts of rapid amplification of polymorphic DNA (RAPD) fragments was constructed, and screened by PCR amplification using anchored simple sequence repeats as primers. A total of 2. clones were identified as positives, and 13 microsatellite loci were found after sequencing. The polymorphism of these 13 microsatellite loci was examined and the utility of simple sequence repeats (SSR) and inter-SSR (ISSR) marker systems for genetic characterization compared using 19 selected ramie cultivars. Both approaches successfully discriminated the 19 cultivars which differed in the amount of polymorphism detected. The level of polymorphism detected by SSR was 95.0%, higher than that by ISSR (72.3%), but the average polymorphism information content (PIC) of ISSR (0.651) was higher than that of SSR (0.441). The higher PIC value of ISSR suggests that ISSR is more efficient for fingerprinting ramie cultivars than SSR markers. However, because the SSR loci are codominant, they are more suitable for determining the homozygosity levels of ramie, constructing linkage map, quantitative trait loci study of complex traits and marker-assisted selection.

关键词： ramie (Boehmeria nivea L.Gaud) simple sequence repeats inter-simple sequence repeats

Tuberculous peritonitis complicated by an intraperitoneal tuberculous abscess: A case report

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World Journal of Clinical Cases 2024年第27期12卷 6117-6123页

作者： Wei-Peng Liu Feng-Zhen Ma zhou Zhao Zong-Rui Li Bao-guang Hu Tao Yang Department of Gastrointestinal Surgery Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina Department of Gastroenterology Binzhou Medical University HospitalBinzhou 256603Shandong ProvinceChina

BACKGROUND Tuberculous peritonitis(TBP)is a chronic,diffuse inflammation of the peritoneum caused by Mycobacterium *** route of infection can be by direct spread of intraperitoneal tuberculosis(TB)or by hematogenous *** former is more common,such as intestinal TB,mesenteric lymphatic TB,fa-llopian tube TB,etc.,and can be the direct primary lesion of the *** SUMMARY We present an older male patient with TBP complicated by an abdominal *** patient's preoperative symptoms,signs and imaging data suggested a poss-ible abdominal *** surgical treatment,the patient's primary diagnosis of TBP complicating an intraperitoneal tuberculous abscess was established by com-bining past medical history,postoperative pathology,and positive results of TB-related laboratory *** patient's symptoms were significantly reduced after surgical treatment,and he was discharged from the hospital with instructions to continue treatment at a TB specialist hospital and to undergo anti-TB treatment if *** This case report analyses the management of TBP complicated by intraperitoneal tuberculous abscess and highlights the importance of early definitive diagnosis in the hope of improving the clinical management of this type of disease.

关键词： Abdominal mass Tuberculous peritonitis Intraperitoneal tuberculous abscess Surgical treatment Case report

An intelligent prediction model of epidemic characters based on multi-feature

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CAAI Transactions on Intelligence Technology 2024年第3期9卷 595-607页

作者： Xiaoying Wang Chunmei Li Yilei Wang Lin Yin Qilin zhou Rui Zheng Qingwu Wu Yuqi zhou Min Dai Information Center Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina School of Computer Science Qufu Normal UniversityRizhaoChina Department of Allergy Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhou china 4Department of Otorhinolaryngology‐Head and Neck Surgery Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina Department of Pulmonary and Critical Care Medicine Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina Department of Traditional Chinese Medicine Third Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina

The epidemic characters of Omicron(***-scale transmission)are significantly different from the initial variants of *** data generated by large-scale transmission is important to predict the trend of epidemic ***,the re-sults of current prediction models are inaccurate since they are not closely combined with the actual situation of Omicron *** consequence,these inaccurate results have negative impacts on the process of the manufacturing and the service industry,for example,the production of masks and the recovery of the tourism *** authors have studied the epidemic characters in two ways,that is,investigation and ***,a large amount of data is collected by utilising the Baidu index and conduct questionnaire survey concerning epidemic ***,theβ-SEIDR model is established,where the population is classified as Susceptible,Exposed,Infected,Dead andβ-Recovered persons,to intelligently predict the epidemic characters of *** thatβ-Recovered persons denote that the Recovered persons may become Sus-ceptible persons with probabilityβ.The simulation results show that the model can accurately predict the epidemic characters.

关键词： artificial intelligence big data data analysis evaluation feature extraction intelligent information processing medical applications

BET inhibitors potentiate melanoma ferroptosis and immunotherapy through AKR1C2.inhibition

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Military Medical Research 2024年第4期 620-624页

作者： Yu Meng Hui-Yan Sun Yi He Qian zhou Yi-Huang Liu Hui Su Ming-Zhu Yin Fu-Rong Zeng Xiang Chen guang-Tong Deng Department of Dermatology Xiangya HospitalCentral South University National Engineering Research Center of Personalized Diagnostic and Therapeutic Technology Furong Laboratory Hunan Key Laboratory of Skin Cancer and Psoriasis Hunan Engineering Research Center of Skin Health and DiseaseXiangya HospitalCentral South University National Clinical Research Center for Geriatric Disorders Xiangya Hospital Department of Breast Reconstruction Tianjin Medical University Cancer Institute and Hospital Department of Oncology Xiangya HospitalCentral South University

Dear Editor,Ferroptosis, an iron-dependent form of cell death driven by overwhelming lipid peroxidation, represents a vulnerability in cancers, and therapeutic strategies to further potentiate ferroptosis hold great potential for melanoma *** systematically identify drugs that sensitize ferroptosis,weinitiallycalculatedferroptosisscore(FPS)usingour publishedalgorithmmodel[1],andconductedspearman correlation analysis between FPS and the cell sensitivities tovariousanti-cancerdrugsacross859cancercelllines.

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Manipulating d-d orbital hybridization induced by Mo-doped Co_(9)S_(8) nanorod arrays for high-efficiency water electrolysis

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Journal of Energy Chemistry 2024年第6期93卷 592-600,I0015页

作者： Xue zhou Jing Li guangyao zhou Weiran Huang Yucan Zhang Jun Yang Huan Pang Mingyi Zhang Dongmei Sun Yawen Tang Lin Xu Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023JiangsuChina 'College of Science Jinling Institute of TechnologyNanjing 211169JiangsuChina State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Nanjing IPE Institute of Green Manufacturing Industry Nanjing 211100JiangsuChina School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225009JiangsuChina Key Laboratory for Photonic and Electronic Bandgap Materials Ministry of EducationSchool of Physics and Electronic EngineeringHarbin Normal UniversityHarbin 150025HeilongjiangChina

Precisely refining the electronic structure of electrocatalysts represents a powerful approach to further optimize the electrocatalytic ***,we demonstrate an ingenious d-d orbital hybridization concept to construct Mo-doped Co_(9)S_(8) nanorod arrays aligned on carbon cloth(CC)substrate(abbreviated as Mo-Co_(9)S_(8)@CC hereafter)as a high-efficiency bifunctional electrocatalyst toward water *** has experimentally and theoretically validated that the 4d-3d orbital coupling between Mo dopant and Co site can effectively optimize the H_(2.O activation energy and lower H^(*)adsorption energy barrier,thereby leading to enhanced hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)*** to the unique electronic and geometrical advantages,the optimized Mo-Co_(9)S_(8)@CC with appropriate Mo content exhibits outstanding bifunctional performance in alkaline solution,with the overpotentials of 75 and 2.4 mV for the delivery of a current density of 10 mA cm^(-2.,small Tafel slopes of 53.8 and 39.9 mV dec~(-1)and long-term stabilities for at least 32.and 30 h for HER and OER,*** impressively,a water splitting electrolylzer assembled by the self-supported Mo-Co_(9)S_(8)@CC electrode requires a low cell voltage of 1.53 V at 10 mA cm^(-2.and shows excellent stability and splendid reversibility,demonstrating a huge potential for affordable and scalable electrochemical H_(2. *** innovational orbital hybridization strategy for electronic regulation herein provides an inspirable avenue for developing progressive electrocatalysts toward new energy systems.

关键词： d-d orbital hybridization Transition metal sulfides Nanorods arrays Water electrolysis

Quenching and flow of charm and bottom quarks via semi-leptonic decay of D and B mesons in Pb+Pb collisions at the LHC

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Chinese Physics C 2024年第8期48卷 190-197页

作者： Shu-Qing Li Wen-Jing Xing Shanshan Cao guang-You Qin School of Physics and Electronic Engineering Jining UniversityQufu 273155China Institute of Frontier and Interdisciplinary Science Shandong UniversityQingdao 266237China Institute of Particle Physics and Key Laboratory of Quark and Lepton Physics(MOE) Central China Normal UniversityWuhan 430079China

Heavy flavor particles provide important probes of the microscopic structure and thermodynamic properties of the quark-gluon plasma(QGP)produced in high-energy nucleus-nucleus *** studied the energy loss and flow of charm and bottom quarks inside the QGP via the nuclear modification factor(R_(AA))and elliptic flow coefficient(v_(2.)of their decayed leptons in heavy-ion collisions at the *** dynamical evolution of the QGP was performed using the CLVisc(3+1)-dimensional viscous hydrodynamics model;the evolution of heavy quarks inside the QGP was simulated with our improved Langevin model that considers both collisional and radiative energy loss of heavy quarks;the hadronization of heavy quarks was simulated via our hybrid coalescence-fragmentation model;and the semi-leptonic decay of D and B mesons was simulated via *** the same spatial diffusion coefficient for charm and bottom quarks,we obtained smaller R_(AA) and larger v_(2. of charm decayed leptons than bottom decayed leptons,indicating stronger energy loss of charm quarks than bottom quarks inside the QGP within our current model setup.

关键词： quark-gluon plasma heavy-ion collisions jet quenching anisotropic flow heavy quark heavy flavor muon

AN EXTREMAL APPROACH TO BIRKHOFF QUADRATURE FORMULAS

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Journal of Computational Mathematics 2001年第5期19卷 459-466页

作者： Ying-guang Shi (Department of Mathematics, Hunan normal {2., Changsha 410081, china) 湖南师范大学湖南长沙 410081

Discusses an extremal problem with Birkhoff interpolation constraints. Quadrature formula derived from an extremal problem; Overview of auxiliary lemmas; Derivation of some properties of polynomials.

关键词： an extremal approach Birkhoff quadrature formulas