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Probabilistic movement primitive based motion learning for a lower limb exoskeleton with black-box optimization Research Article

Jiaqi WANG, Yongzhuo GAO, Dongmei WU, Wei DONG,wangjq@hit.edu.cn,gaoyongzhuo@hit.edu.cn,wdm@hit.edu.cn,dongwei@hit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1,   Pages 104-116 doi: 10.1631/FITEE.2200065

Abstract: As a wearable robot, an exoskeleton provides a direct transfer of mechanical power to assist or augment the wearer’s movement with an anthropomorphic configuration. When an exoskeleton is used to facilitate the wearer’s movement, a motion generation process often plays an important role in high-level control. One of the main challenges in this area is to generate in real time a reference trajectory that is parallel with human intention and can adapt to different situations. In this paper, we first describe a novel motion modeling method based on probabilistic (ProMP) for a , which is a new and powerful representative tool for generating motion trajectories. To adapt the trajectory to different situations when the exoskeleton is used by different wearers, we propose a novel scheme based on (BBO) PI combined with ProMP. The motion model is first learned by ProMP offline, which can generate reference trajectories for use by exoskeleton controllers online. PI is adopted to learn and update the model for online , which provides the capability of adaptation of the system and eliminates the effects of uncertainties. Simulations and experiments involving six subjects using the HEXO demonstrate the effectiveness of the proposed methods.

Keywords： limb exoskeleton     Human-robot interaction     Motion learning     Trajectory generation     Movement primitive     Black-boxoptimization    

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Adsorption property of direct fast black onto acid-thermal modified sepiolite and optimization of adsorptionconditions using Box-Behnken response surface methodology

Chengyuan SU, Weiguang LI, Yong WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 4,   Pages 503-511 doi: 10.1007/s11783-012-0477-9

Abstract: The adsorption of direct fast black onto acid-thermal modified sepiolite was investigated.The three-factor and three-level Box-Behnken response surface methodology (RSM) was utilized for modelingand optimization of the adsorption conditions for direct fast black onto the acid-thermal modified sepioliteThe three dimensional fluorescence spectra of direct fast black before and after treatment showed thatthe direct fast black was almost all adsorbed by the acid-thermal modified sepiolite.

Keywords： direct fast black     acid-thermal modified sepiolite     adsorption     response surface methodology    

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One-Variable Attack on The Industrial Fault Classification System and Its Defense Article

Yue Zhuo, Yuri A.W. Shardt, Zhiqiang Ge

Engineering 2022, Volume 19, Issue 12,   Pages 240-251 doi: 10.1016/j.eng.2021.07.033

Abstract: This paper proposes a black-box attack method with an extreme constraint for a safe-critical industrialmethod is close to (on TEP) or even higher than (on SP) the current most effective first-order white-box

Keywords： Adversarial samples     Black-box attack     Industrial data security     Fault classification system    

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An integrated approach for machine-learning-based system identification of dynamical systems under control: application towards the model predictive control of a highly nonlinear reactor system

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 237-250 doi: 10.1007/s11705-021-2058-6

Abstract: adequately describe the process dynamics across its operating range while remaining amenable to fast optimizationThis work articulates an integrated system identification procedure for deriving black-box nonlinear

Keywords： nonlinear model predictive control     black-box modeling     continuous-time system identification     machine    

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Enhancement of the electrocatalytic oxidation of antibiotic wastewater over the conductive black carbon-PbO

Xiangyu Wang, Yu Xie, Guizhen Yang, Jiming Hao, Jun Ma, Ping Ning

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 2, doi: 10.1007/s11783-019-1201-9

Abstract: • A novel conductive carbon black modified lead dioxide electrode is synthesized. • The modified PbO2In this study, an environmentally friendly material, conductive carbon black, was adopted for modificationIt was observed that the as-prepared conductive carbon black modified electrode (C-PbO2) exhibited anThis intimates that the presence of conductive carbon black could improve the current efficiency, promoteelectrode to treat antibiotic wastewater, optimal experimental conditions were predicted through the Box-Behnken

Keywords： Conductive carbon black     PbO2 electrode     Metronidazole     Electrochemical oxidation     Box-Behnken    

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Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1372-4

Abstract:

• The MCNZVI is prepared as an interesting material for PS activation.

Keywords： MCNZVI     Core-shell structure     Reactive Black 5     Persulfate     Mechanism    

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Optimization of cellulase production using

Saravanan P, Muthuvelayudham R, Rajesh Kannan R, Viruthagiri T

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 443-452 doi: 10.1007/s11705-012-1225-1

Abstract: Box-Behnken design (BBD) statistical tool and genetic algorithm (GA) are used to optimize the process

Keywords： cellulase     pineapple waste     Trichoderma reesei     Box-Behnken design     genetic algorithm    

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Control efficiency optimization and Sobol’s sensitivity indices of MTMDs design parameters for buffeting

Nazim Abdul NARIMAN

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 66-89 doi: 10.1007/s11709-016-0356-8

Abstract: This paper studies optimization of three design parameters (mass ratio, frequency ratio and damping ratiomass dampers MTMDs that are applied in a cable stayed bridge excited by a strong wind using minimax optimizationBox-Behnken experimental method is dedicated to formulate the surrogate models to represent the controlThe optimization results revealed better performance of the MTMDs in controlling the vertical and the

Keywords： MTMDs     power spectral density     fast Fourier transform     minimax optimization technique     Sobol’s sensitivityindices     Box-Behnken method    

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Implicit Heaviside filter with high continuity based on suitably graded THB splines

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 14-14 doi: 10.1007/s11465-021-0670-2

Abstract: The variable density topology optimization (TO) method has been applied to various engineering fieldsIn this paper, an implicit Heaviside filter with high continuity is introduced to generate black andimplicit adaptively adjusted Heaviside filter is obtained to remove the checkboard patterns and generate blackimplicit sensitivity filter based on B-splines under successive global refinement; and c) the generated black

Keywords： topology optimization     truncated hierarchical B-spline     isogeometric analysis     black and white designs    

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Finite element analysis on stress and optimization for hydraulic transmission box upper case

Liu Chuanfeng,Tian Aiqin

Strategic Study of CAE 2008, Volume 10, Issue 5,   Pages 70-74

Abstract: This article is about upper case of hydraulic transmission box.

Keywords： hydraulic transmission box     mechanics model     finite element analysis     stress diagram     static intensity    

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Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 12, doi: 10.1007/s11783-022-1585-9

Abstract:

● The physicochemical and structural properties of DBC were characterized.

Keywords： Dissolved black carbon (DBC)     Chlorine     Chloramine     Disinfection by-products (DBPs)     Disinfection by-products    

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oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 6,   Pages 704-715 doi: 10.1007/s11705-022-2270-z

Abstract: multifunctional films was prepared by blending chitosan and nano-ZnO with purple tomato anthocyanins or blackIt was found purple tomato anthocyanins showed more significant color change against pH than black wolfberryComposite films made from black wolfberry anthocyanins exhibited higher mechanical performance than those

Keywords： bio-based     multifunction     colorimetric indicator     active and intelligent packaging    

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Property-performance relationship of core-shell structured black TiO photocatalyst for environmental

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1711-3

Abstract:

● Properties and performance relationship of CSBT photocatalyst were investigated.

Keywords： Black TiO2     Core-shell structure     Property-performance relationship     Agro-industrial effluent    

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Optimization of microwave-assisted extraction for picroside I and picroside II from

Pravin WAKTE,Ajit PATIL,Bhusari SACHIN,Munnaza QUAZI,Shraddha JABDE,Devanand SHINDE

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4,   Pages 445-453 doi: 10.1007/s11705-014-1458-2

Abstract: The response surface methodology was employed to study the optimization of microwave-assisted extractiontemperature, time and solvent on the yields of picroside I and picroside II have been investigated using Box-Behnken

Keywords： Box-Behnken design     microwave-assisted extraction     picroside I     picroside II     Picrorrhiza kurroa    

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Effect of inlet box on performance of axial flow fans

LI Jingyin, TIAN Hua, YUAN Xiaofang

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 390-394 doi: 10.1007/s11708-008-0087-1

Abstract: Numerical investigations on 3D flow fields in an axial flow fan with and without an inlet box have beenfan performance caused by the internal flow fields and the velocity evenness at the exit of the inlet boxIt is interesting to find that although the inlet box is well designed in accordance with basic designThis research shows that the inlet box needs further improvement and such a check on the flow fields

Keywords： box     velocity distribution     accordance     Numerical     variation    

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Title Author Date Type Operation

Probabilistic movement primitive based motion learning for a lower limb exoskeleton with black-box optimization

Jiaqi WANG, Yongzhuo GAO, Dongmei WU, Wei DONG,wangjq@hit.edu.cn,gaoyongzhuo@hit.edu.cn,wdm@hit.edu.cn,dongwei@hit.edu.cn

Journal Article

Adsorption property of direct fast black onto acid-thermal modified sepiolite and optimization of adsorptionconditions using Box-Behnken response surface methodology

Chengyuan SU, Weiguang LI, Yong WANG

Journal Article

One-Variable Attack on The Industrial Fault Classification System and Its Defense

Yue Zhuo, Yuri A.W. Shardt, Zhiqiang Ge

Journal Article

An integrated approach for machine-learning-based system identification of dynamical systems under control: application towards the model predictive control of a highly nonlinear reactor system

Journal Article

Enhancement of the electrocatalytic oxidation of antibiotic wastewater over the conductive black carbon-PbO

Xiangyu Wang, Yu Xie, Guizhen Yang, Jiming Hao, Jun Ma, Ping Ning

Journal Article

Preparation of nZVI embedded modified mesoporous carbon for catalytic persulfate to degradation of reactive black

Journal Article

Optimization of cellulase production using

Saravanan P, Muthuvelayudham R, Rajesh Kannan R, Viruthagiri T

Journal Article

Control efficiency optimization and Sobol’s sensitivity indices of MTMDs design parameters for buffeting

Nazim Abdul NARIMAN

Journal Article

Implicit Heaviside filter with high continuity based on suitably graded THB splines

Journal Article

Finite element analysis on stress and optimization for hydraulic transmission box upper case

Liu Chuanfeng,Tian Aiqin

Journal Article

Characteristics of typical dissolved black carbons and their influence on the formation of disinfection

Journal Article

oxide for active and intelligent packaging: comparison of anthocyanins source from purple tomato or black

Journal Article

Property-performance relationship of core-shell structured black TiO photocatalyst for environmental

Journal Article

Optimization of microwave-assisted extraction for picroside I and picroside II from

Pravin WAKTE,Ajit PATIL,Bhusari SACHIN,Munnaza QUAZI,Shraddha JABDE,Devanand SHINDE

Journal Article

Effect of inlet box on performance of axial flow fans

LI Jingyin, TIAN Hua, YUAN Xiaofang

Journal Article