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Algebraic Method‑Based Point‑to‑Point Trajectory Planning of an Under‑Constrained Cable‑Suspended Parallel Robot with Variable Angle and Height Cable Mast

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Chinese Journal of Mechanical Engineering 2020年第4期33卷 45-62页

作者： Tao Zhao Bin Zi sen Qian Jiahao Zhao School of Mechanical Engineering Hefei University of TechnologyHefei 230009China Chemical Science and Engineering College North Minzu UniversityYinchuan 750021China

To avoid impacts and vibrations during the processes of acceleration and deceleration while possessing flexible working ways for cable-suspended parallel robots(CSPRs),point-to-point trajectory planning demands an under-constrained cable-suspended parallel robot(UCPR)with variable angle and height cable mast as described in this *** end-effector of the UCPR with three cables can achieve three translational degrees of freedom(DOFs).The inverse kinematic and dynamic modeling of the UCPR considering the angle and height of cable mast are *** motion trajectory of the end-effector comprising six segments is *** connection points of the trajectory segments(except for point P3 in the X direction)are devised to have zero instantaneous velocities,which ensure that the acceleration has continuity and the planned acceleration curve achieves smooth *** trajectory is respectively planned using three algebraic methods,including fifth degree polynomial,cycloid trajectory,and double-S velocity *** results indicate that the trajectory planned by fifth degree polynomial method is much closer to the given trajectory of the *** simulation and experiments are accomplished for the given trajectory based on fifth degree polynomial *** the points where the velocity suddenly changes,the length and tension variation curves of the planned and unplanned three cables are compared and *** OptiTrack motion capture system is adopted to track the end-effector of the UCPR during the *** effectiveness and feasibility of fifth degree polynomial planning are validated.

关键词： Under-constrained cable-suspended parallel robot Variable angle and height cable mast Inverse kinematic and dynamic modeling Algebraic method Point-to-point trajectory planning

Geochemical signatures of Mesoproterozoic siliciclastic rocks of the Kaimur Group of the Vindhyan Supergroup,Central India

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Chinese Journal Of Geochemistry 2010年第1期29卷 21-32页

作者： Meenal Mishra Shinjana sen Department of Geology Faculty of ScienceBanaras Hindu University

The Upper Kaimur Group of the Vindhyan Supergroup in Central India,primarily consists of three rock types-DhandraulSandstone,Scarp Sandstone and Bijaigarh *** and geochemically,they are quartz arenite,sublitharenite to litharenite and litharenite to shale in composition,*** A-CN-K ternary plot and CIA and ICV values suggest that the similar source rocks suffered severe chemical weathering,under a hot-humid climate in an acidic environment with higher PCO2,which facilitated high sediment influx in the absence of land *** geochemical discriminants,elemental ratios like K2O/Na2O,Al2O3/TiO2,SiO2/MgO,La/Sc,Th/Sc,Th/Cr,GdN/YbN and pronounced negative Eu anomalies indicate the rocks to be of post-Archean Proterozoic granitic source,with a minor contribution of granodioritic input,in a passive margin *** sediments of the Upper Kaimur Group were probably deposited in the interglacial period in between the Paleoproterozoic and Neoproterozoic glacial epochs.

关键词：地球化学特征中元古代印度 Al2O3/TiO2 碎屑岩超群二氧化碳分压地球化学判别

Atomic layer deposition of TiO_(2) on carbon-nanotubes membrane for capacitive deionization removal of chromium from water

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Chinese Journal of Chemical Engineering 2022年第5期35卷 15-21页

作者： Jianhua Feng sen Xiong Li Ren Yong Wang College of Material and Chemical Engineering Chuzhou UniversityChuzhou 239000China State Key Laboratory of Materials-Oriented Chemical Engineering and College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Chromium(Cr)is a common heavy metal that has severe impacts on the ecosystem and human *** deionization(CDI)is an environment-friendly and energy-efficient electrochemical purification technology to remove Cr from polluted *** performance of CDI systems relies primarily on the properties of ***-nanotubes(CNTs)membranes are promising candidates in creating advanced CDI electrodes and ***,the low electrosorption capacity and high hydrophobicity of CNTs greatly impede their applications in water *** this study,we employ atomic layer deposition(ALD)to deposit TiO_(2) nanoparticulates on CNTs membranes for preparing electrodes with *** TiO_(2)-deposited CNTs membranes display preferable electrosorption performance and reusability in CDI processes after only 20 ALD cycles *** total Cr and Cr(VI)removal efficiencies are significantly improved to 92.1%and 93.3%,*** work demonstrates that ALD is a highly controllable and simple method to produce advanced CDI electrodes,and broadens the application of metal oxide/carbon composites in the electrochemical processes.

关键词： Carbon-nanotube membranes Atomic layer deposition Capacitive deionization Chromium removal

Data-fusion method for flaws detection based on reliability evaluation 36

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Data-fusion method for flaws detection based on reliability ...

Interactions among Periodic Waves and Solitary Waves of the(2+1)-Dimensional Konopelchenko-Dubrovsky Equation

第36届中国控制会议

作者： Li Wang Zhi-jie Zhou sen-sen Li High-Tech Research Institute of Xi'an Xi'an University of Technology Northwestern Polytechnical University

ISBN: (纸本)9781538629185

In order to solve the problem of low accuracy of flaws detection in non-destructive testing,a data-fusion method based on RBF neural network and evidential reasoning（ER） rule is ***,a data-fusion model is proposed which contains two ***,the first part RBF neural network is used to fuse the feature layer,and its output is normalized as the basic probability assignment（BPA） of each evidence for the next ***,according to the traditional D-S evidence theory,the accuracy of the flaws detection is not high enough and the evidence conflict is *** it’s necessary to introduce the evidence reliability factor to evaluate the reliability of the evidence,so that all kinds of evidence pass evaluation and then make ***,the defect data of a composite material is obtained by means of ultrasonic detection,and the method proposed in this paper is *** results show that the method can accurately identify the flaw types,compared with other methods to improve the accuracy of detection.

关键词： Fault diagnosis data fusion evidence reasoning rule neural network

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Chinese Physics Letters 2013年第6期30卷 5-8页

作者： LEI Ya LOU sen-Yue Faculty of Science Ningbo UniversityNingbo 315211 Shanghai Key Laboratory of Trustworthy Computing East China Normal UniversityShanghai 200062

By using the truncated Painlevéanalysis and the generalized tanh function expansion approaches,many interaction solutions among solitons and other types of nonlinear excitations of the Konopelchenko–Dubrovsky(KD)equation can be ***,the soliton-cnoidal wave interaction solutions are studied by means of the Jacobi elliptic functions and the third type of incomplete elliptic integrals.

关键词： elliptic interaction soliton

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Science China Mathematics 2011年第6期54卷 1225-1232页

作者： ZHU sen JI YouQing Department of Mathematics Jilin University Changchun 130012 China

Let B(H) be the algebra of all bounded linear operators on a complex separable infinite dimensional Hilbert space *** by π the quotient map of B(H) onto the Calkin algebra A(H).In 1984,Apostol et *** the following conjecture:If an operator T on H is not similar to a compact perturbation of a Jordan operator,then the similarity orbit of π(T) in A(H) coincides with the π-image of the similarity orbit of *** this paper,we investigate the structure of similarity orbits in the Calkin algebra and give a negative answer to the above conjecture.

关键词： Calkin algebra similarity similarity orbits compact operators

Role of cytochrome P450 polymorphisms and functions in development of ulcerative colitis

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World Journal of Gastroenterology 2019年第23期25卷 2846-2862页

作者： Alaattin sen Holger Stark Department of Molecular Biology and Genetics Faculty of Life and Natural SciencesAbdullah Gul UniversityKayseri 38080Turkey Biology Department Faculty of Arts and SciencesPamukkale UniversityDenizli 20070Turkey Institute of Pharmaceutical and Medicinal Chemistry Heinrich Heine University DüsseldorfDuesseldorf 40225Germany

Cytochromes P450 s(CYPs) are terminal enzymes in CYP dependent monooxygenases, which constitute a superfamily of enzymes catalysing the metabolism of both endogenous and exogenous substances. One of their main tasks is to facilitate the excretion of these substances and eliminate their toxicities in most phase 1 reactions. Endogenous substrates of CYPs include steroids, bile acids, eicosanoids, cholesterol, vitamin D and neurotransmitters. About 80% of currently used drugs and environmental chemicals comprise exogenous substrates for CYPs. Genetic polymorphisms of CYPs may affect the enzyme functions and have been reported to be associated with various diseases and adverse drug reactions among different populations. In this review, we discuss the role of some critical CYP isoforms(CYP1 A1, CYP2 D6, CYP2 J2, CYP2 R1,CYP3 A5, CYP3 A7, CYP4 F3, CYP24 A1, CYP26 B1 and CYP27 B1) in the pathogenesis or aetiology of ulcerative colitis concerning gene polymorphisms. In addition, their significance in metabolism concerning ulcerative colitis in patients is also discussed showing a clear underestimation in genetic studies performed so far.

关键词： Cytochrome P450 Polymorphism Function Ulcerative colitis Aetiology

First-principles study of electronic structure and optical properties of Er:Lu_(2)O_(3)

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Journal of Rare Earths 2021年第4期39卷 453-459页

作者： Xian Zhang Honglei Zhao sen Gao Qingfeng Zeng School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710071China International Center for Materials Discovery School of Materials Science and EngineeringNorthwestern Poly technical UniversityXi'an 710072China

In the present computational study,we found that Er:Lu_(2)O_(3)materials have promise for application in laser *** crystal structure and the electronic and optical properties of Er:Lu_(2)O_(3)materials were studied using first-principle calculations under the framework of density functional *** on the experimental and calculated results,the structure of Lu_(2)O_(3)was *** calculated results show that doping by Er^(3+)can effectively improve its absorption coefficient in the ultraviolet region and improve the static dielectric constant of Lu_(2)O_(3).As the doping concentration of Er^(3+)increases,the energy of the valence band electrons excited to the conduction band decreases,and the transition is more likely to *** absorption coefficient,reflectance,and electron energy loss spectroscopy are bathochromic *** Lu_(2-x)Er_(x)O_(3)(0

关键词： Electronic structure First principles Optical property Er:Lu_(2)O_(3) Rare earths

Modeling De-No_(x) by Injection Ammonia in High Temperature Zone of Cement Precalciner

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Journal of Thermal Science 2021年第2期30卷 636-643页

作者： ZHANG Leyu WEI Xiaolin ZHANG Zhongxiao LI sen Institute of Mechanics Chinese Academy of SciencesBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100190China School of Environment and Architecture University of Shanghai for Science and TechnologyShanghai 200093China

The quantity of NO_(x) emission from cement production is second only to thermal power generation and vehicle *** this paper,a phenomenon found by Taniguchi is used to achieve NO_(x) reduction in the cement *** on his results,it is proposed to reduce NO_(x) that ammonia is injected in the high-temperature and lean-oxygen zone(HT-DeNO_(x))during pulverized coal *** a large cement precalciner(3200 t/d),numerical simulation is used to evaluate the technology of HT-DeNO_(x) combined with the traditional selective non-catalytic reduction(SNCR)*** results indicate that NH3 and HCN in HT-DeNO_(x) can reduce NO during the reaction *** very little ammonia injection(normalized stoichiometric ratio NSR=0.1,the normalized stoichiometric ratio),the efficiency of NO reduction by HT-DeNO_(x) is 27.72%.Combining SNCR(NSR=1.1)and HT-DeNO_(x)(NSR=0.1),the reduction efficiency will be improved to 60.05%,compared with 50.83%efficiency when using only SNCR at NSR=1.2.

关键词： cement precalciner coal combustion CaCO_(3) decomposition high temperature zone SNCR