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New triterpenoid saponins from the leaves of Ilex chinensis and their hepatoprotective activity

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Chinese Journal of Natural Medicines 2021年第5期19卷 376-384页

作者： SHAO Si-Yuan li Ruo-Fei SUN Hua li shuai State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Seven new triterpenoid saponins,including five ursane-type saponins,ilexchinenosides R–V(1–5),and two oleananetype saponins,ilexchinenosides W–X(6–7),with four known triterpenoid saponins(8–11)were isolated from the leaves of Ilex *** structures were elucidated by comprehensive spectroscopic 1 D and 2 D NMR and HR-ESI-MS *** sugar moieties were determined by HPLC analysis compared with standards after hydrolysis and *** 1,2,4,9 and 10 exhibited potential hepatoprotective activity against N-acetyl-p-aminophenol(APAP)-induced Hep G2 cell injury in vitro.

关键词： Ilex chinensis Ursane and oleanane Triterpenoid saponins Hepatoprotective activity

Regulation effect of the grille spacing of a funnel-type grating water–sediment separation structure on the debris flow performance

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Journal of Mountain Science 2024年第7期21卷 2283-2304页

作者： li shuai GU Tianfeng WANG Jiading WANG Fei li Pu State Key Laboratory of Continental Dynamics/Department of Geology Northwest UniversityXi’an 710069China Chengdu Institute of Mountain Hazards and Environment Ministry of Water Resources&Chinese Academy of SciencesChengdu 610299China

The size of pores or the grille spacing of water–sediment separation structures directly affects their regulation effect on the debris flow performance.A suitable pore size or grille spacing can effectively improve the water–sediment separation ability of the *** new funnel-type grating water–sediment separation structure(FGWSS)combines vertical and horizontal structures and provides a satisfactory water–sediment separation ***,the regulation effect of the grille spacing of the structure on the debris flow performance has not been *** regulation effect of the structure grille spacing on the debris flow performance is studied through a flume test,and the optimal structure grille spacing is *** empirical equation of the relationship between the relative grille spacing of the structure and the sediment separation rate is ***,the influence of the water–sediment separation structure on the regulation effect of debris flows is examined from two aspects:external factors(properties of debris flows)and internal factors(structural factors).The experimental results show that the gradation characteristics of solid particles in debris flows constitute a key factor affecting the regulation effect of the structure on the debris flow *** optimum grille spacing of the FGWSS matches the particle size corresponding to the material distribution curves d85~d90 of the debris *** total separation rate of debris flow particles is related to the grille spacing of the structure and the content of coarse and fine particles in the debris flow.

关键词： Debris flow Water–sediment separation structure Grille spacing Performance regulation effect

Design and implementation of robot serial integrated rotary joint with safety compliance

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Journal of Central South University 2017年第6期24卷 1307-1321页

作者： li shuai li Jian li Si-qi HUANG Zong-lin School of Mechatronical Engineering Beijing Institute of TechnologyBeijing 100081China School of Automation Beijing Institute of TechnologyBeijing 100081China

In order to guarantee safety and stability during physical human-robot-interaction(p HRI) in the occasion of service or industrial operation, a serial integrated rotary joint with the characteristics of passive and active compliance is proposed. Passive compliance is achieved by a designed elastic element, such that the compliant joint may minimize large force which occurs during accidental impacts and, further, may offer more accurate and stable force control and a capacity for energy storage. Meanwhile, the modeling of the compliant joint is comprehensively analyzed, including the effect of the motor model on the overall control system. In order to realize the active compliance, a new method of impedance control is proposed. On the basis of PD control, a more compliant impedance controller is introduced. Experimental results show that the serial integrated rotary joint can provide more effective safety compliance during physical interaction, which has also been well applied in our designed massage robot and rehabilitation robot.

关键词： elastic element impedance control safety compliance active compliance serial integrated rotary joint

HFIP-mediated three-component imidization of electron-rich arenes with in situ formed spiroindolenines for facile construction of 2-arylspiroindolenines

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Organic Chemistry Frontiers 2022年第6期9卷 1696-1702页

作者： Chunyan Ge liang Wang Fangzhi Hu Zhanshuai Ding Xinyao li Deshuai Xiao Jiayi Wang shuai-shuai li College of Chemistry and Pharmaceutical Sciences Qingdao Agricultural UniversityQingdao 266109China

The three-component reaction of o-aminobenzaldehydes with 5-hydroxyindole and electron-rich areneshas been achieved through HFIP-mediated cascade hydride transfer/dearomative cyclization/CDC-typeimidization at room temperature under air,providing a variety of 2-arylspiroindolenines carrying diversefunctional groups with moderate to good *** derivatizations of the products also were conductedto enhance the synthetic practicality of this protocol.

关键词： indole facile benzaldehyde

Effect of Rare Earth Doping on the Tensile Properties of High Temperature Oxidation Coating

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Journal of Wuhan University of Technology(Materials Science) 2023年第6期38卷 1449-1456页

作者： ZHANG Shilei li shuai ZHAO Yuncai WANG Ximao liU Cunyu School of Mechanical and Electrical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

The failure process was characterized by complex diffusion of elements in the bonding layer,TGO growth and growth stress inside the *** studied the aluminum migration phenomenon of NiCoCrAlY and NiCoCrAlYHf coatings under high temperature oxidation,TGO growth characteristics,the microstructure and composition of the bonding layer,and integrates them into the description of the surface strain under coating *** experimental results show that the TGO growth rate of NiCoCrAIYHf coating is lower than that of NiCoCrAIY coating,and the formed TGO is *** high temperature oxidation,the cracking time of NiCoCrAIY coating is advanced,while the cracking time of rare earth doped coating is *** addition of rare earth elements can effectively inhibit the generation of spinel phase,improve the fracture toughness of TGO,refine the grains in the bonding layer,and increase the grain boundary strengthening by 29.1 MPa which is consistent with the experimental ***,the yield strength of the doped coating is improved and the crack time of the coating is delayed.

关键词： thermal barrier coating NiCoCrAIYHf thermal growth oxides high temperature oxidation surfacecrack

Understanding building-occupant-microbiome interactions toward healthy built environments:A review

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Frontiers of Environmental Science & Engineering 2021年第4期15卷 41-58页

作者： shuai li Zhiyao Yang Da Hu liu Cao Qiang He Department of Civil and Environmental Engineering University of TennesseeKnoxvilleTN37996USA Institute for a Secure&Sustainable Environment University of TennesseeKnoxvilleTN37996USA Lyles School of Civil Engineering Purdue UniversityWest LafayetteIN47907USA

Built environments,occupants,and microbiomes constitute a system of ecosystems with extensive interactions that impact one *** the interactions between these systems is essential to develop strategies for effective management of the built environment and its inhabitants to enhance public health and *** studies have been conducted to characterize the microbiomes of the built *** review summarizes current progress in understanding the interactions between attributes of built environments and occupant behaviors that shape the structure and dynamics of indoor microbial *** addition,this review also discusses the challenges and future research needs in the field of microbiomes of the built environment that necessitate research beyond the basic characterization of microbiomes in order to gain an understanding of the causal mechanisms between the built environment,occupants,and microbiomes,which will provide a knowledge base for the development of transformative intervention strategies toward healthy built *** pressing need to control the transmission of SARS-CoV-2 in indoor environments highlights the urgency and significance of understanding the complex interactions between the built environment,occupants,and microbiomes,which is the focus of this review.

关键词： Microbiome Built Environment Occupant Health

Genetic analysis of selected Sargassum fusiforme (Harvey) Setchell (Sargassaceae, Phaeophyta) strains with RAPD and ISSR markers

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Journal of Oceanology and limnology 2019年第3期37卷 783-789页

作者： YAO Jianting shuai li li Shengyao XU Caolu WANG Xiuliang Key Lab of Experimental Marine Biology Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China School of Environmental Science and Engineering Qingdao UniversityQingdao 266071China Dongtou Yangqicai Research Institute Wenzhou 325700China

Since the 1980s,Sargassum fusiforme has been cultivated in Zhejiang,South China,and nowadays it becomes one of the important commercial seaweeds in *** traditions of eating habits in the East Asian countries,this brown alga is used as food,because it contained functional oligo/polysaccharides and chemical components,and was regarded playing roles in antioxidant activities and regulating *** over 15 years’selection,breeding and cultivation,we obtained three strains with good traits and testified their characters during the production,which included the cultivars with high yield and other two good characters,either all the selected strains were applied in the Sargassum *** avoid confusion during the selection and nursery,it was preferred to establish one fingerprint for distinguishing the Sargassum cultivars from different *** amplified polymorphic DNA(RAPD)and inter-simple sequence repeat(ISSR)methods were adopted to analyze the genetic diversities of the selected *** *** that,one fingerprint with RAPD markers was constructed,and one sequence characterized amplifi ed region(SCAR)marker to *** was *** is indicated that the applied fingerprint could be valid in *** genetic and germplasm justification,and will be positive to molecular marker assistance in its selection and cultivation.

关键词： Sargassum fusiforme random amplified polymorphic DNA(RAPD) inter-simple sequence repeat(ISSR) sequence characterized amplified region(SCAR) genetic analysis

Quasi-synchronous control of uncertain multiple electrohydraulic systems with prescribed performance constraint and input saturation

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Chinese Journal of Aeronautics 2023年第9期36卷 416-425页

作者： shuai li Qing GUO Yan SHI Yao YAN Dan JIANG School of Aeronautics and Astronautics University of Electronic Science and Technology of ChinaChengdu 611731China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731China

This article focuses on the high accuracy quasi-synchronous control issue of multiple electrohydraulic systems(MEHS).In order to overcome the negative effects of parameter uncertainty and external load interference of MEHS,a kind of finite-time disturbance observer(FTDO)via terminal sliding mode method is constructed based on the MEHS model to achieve fast and accuracy estimation and compensation *** avoid the differential explosion in backstepping iteration,the dynamic surface control is used in this paper to guarantee the follower electrohydraulic nodes synchronize to the leader motion with a better ***,a timevarying barrier Lyapunov function(tvBLF)is adopted during the controller design process to constraint the output tracking error of MEHS in a prescribed performance with time-varying exponential *** the initial state condition is relax by tvBLF,the input saturation law is also adopted during the controller design process in this paper to restrain the surges of input signals,which can avoid the circuit and mechanical structure damage caused by the volatile input *** MEHS experimental bench is constructed to verify the effectiveness of the theoretical conclusions proposed in this paper and the advantages of the proposed conclusions in this paper are illustrated by a series of contradistinctive experimental results.

关键词： Backstepping Dynamic surface Finite-time disturbance observer Input saturation Multiple Electrohydraulic Systems Output error constraint Quasi-synchronous control

Double integral-enhanced Zeroing neural network with linear noise rejection for time-varying matrix inverse

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CAAI Transactions on Intelligence Technology 2024年第1期9卷 197-210页

作者： Bolin liao Luyang Han Xinwei Cao shuai li Jianfeng li College of Computer Science and Engineering Jishou UniversityJishouChina School of Management Shanghai UniversityShanghaiChina School of Engineering Swansea UniversitySwanseaUK

In engineering fields,time-varying matrix inversion(TVMI)issue is often *** neural network(ZNN)has been extensively employed to resolve the TVMI ***,the original ZNN(OZNN)and the integral-enhanced ZNN(IEZNN)usually fail to deal with the TVMI problem under unbounded noises,such as linear ***,a neural network model that can handle the TVMI under linear noise interference is urgently *** paper develops a double integral-enhanced ZNN(DIEZNN)model based on a novel integral-type design formula with inherent linear-noise ***,its convergence and robustness are verified by deriva-tion *** comparison and verification,the OZNN and the IEZNN models are adopted to resolve the TVMI under multiple identical noise *** experi-ments proved that the DIEZNN model has excellent advantages in solving TVMI problems under linear *** general,the DIEZNN model is an innovative work and is proposed for the first ***,the errors of DIEZNN are always less than 1�10−3 under linear noises,whereas the error norms of OZNN and IEZNN models are not convergent to *** addition,these models are applied to the control of the controllable permanent magnet synchronous motor chaotic system to indicate the superiority of the DIEZNN.

关键词： neural network real-time systems