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| 1 | Multi-objective Optimization of a Parallel Ankle Rehabilitation Robot Using Modified Differential Evolution Algorithm显示文摘Dimensional synthesis is one of the most difficult issues in the field of parallel robots with actuation redundancy. To deal with the optimal design of a redundantly actuated parallel robot used for ankle rehabilitation, a methodology of dimensional synthesis based on multi-objective optimization is presented. First, the dimensional synthesis of the redundant parallel robot is formulated as a nonlinear constrained multi-objective optimization problem. Then four objective functions, separately reflecting occupied space, input/output transmission and torque performances, and multi-criteria constraints, such as dimension, interference and kinematics, are defined. In consideration of the passive exercise of plantar/dorsiflexion requiring large output moment, a torque index is proposed. To cope with the actuation redundancy of the parallel robot, a new output transmission index is defined as well. The multi-objective optimization problem is solved by using a modified Differential Evolution(DE) algorithm, which is characterized by new selection and mutation strategies. Meanwhile, a special penalty method is presented to tackle the multi-criteria constraints. Finally, numerical experiments for different optimization algorithms are implemented. The computation results show that the proposed indices of output transmission and torque, and constraint handling are effective for the redundant parallel robot; the modified DE algorithm is superior to the other tested algorithms, in terms of the ability of global search and the number of non-dominated solutions. The proposed methodology of multi-objective optimization can be also applied to the dimensional synthesis of other redundantly actuated parallel robots only with rotational movements. | WANG Congzhe FANG Yuefa GUO Sheng | 2015 | Chinese Journal of Mechanical Engineering2015，28，4： | 13 |
| 2 | Recent advances in bismuth vanadate-based photocatalysts for photoelectrochemical water splitting显示文摘Photoelectrochemical(PEC)technology is considered to be a promising approach for solar-driven hydrogen production with zero emissions.Bismuth vanadate(BiVO_(4))is a kind of photocatalytic material with strong photoactivity in the visible light region and appropriate band gap for PEC water splitting.However,the solar-to-hydrogen efficiency(STH)of BiVO_(4)is far away from the 10%target needed for practical application due to its poor charge separation ability.Therefore,this review attempts to summarize the strategies for improving the photocurrent density and especially hydrogen production of BiVO_(4)materials through PEC techniques in the last three years,such as doping nonmetal and metal elements,depositing noble metals,constructing heterojunctions,coupling with carbon and metalorganic framework(MOF)materials to further enhance the PEC performance of BiVO_(4)photoanode.This review aims to serve as a general guideline to fabricate highly efficient BiVO_(4)-based materials for PEC water splitting. | Lina Wang Xiaoqiang Shi Yuefa Jia Hongfei Cheng Lei Wang Qizhao Wang | 2021 | Chinese Chemical Letters2021，32，6： | 4 |
| 3 | Analysis of Instantaneous Motions of Deficient-Rank 3-RPS Parallel Manipulators显示文摘 | Huang Zhen Wang Jing Fang Yuefa | 2002 | Mechanism and Machine Theory2002，37，2： | 1 |
| 4 | Multi-fluid modeling of density segregation in a dense binary fluidized bed显示文摘This paper presents simulation results of the density segregation in a dense binary gas fluidized bed using a multi-fluid model from Chao et al. (2011). The segregation behavior of two types of particles with approximately same particle diameters and different particle densities was studied and validated using the experimental data from Formisani et al. (2008). Some detailed information regarding the gas, particle velocity profiles, the distributions of the particle volume fractions and the flotsam-to-total par- ticle volume fraction ratios is presented. The simulation results show that the simulated axial average flotsam-to-total particle volume fraction ratio distribution agrees reasonably with the experimental data of Formisani et al. (2008). The binary particle velocities are closely coupled though the segregation exists. The segregation behavior and the particle velocity profiles are superficial gas velocity dependent. The number and distribution of particle velocity vortices change dramatically with superficial gas velocity: at a comparatively low superficial gas velocity, the particles mainly segregate axially, and at a comparatively high superficial gas velocity, the particles segregate both axially and radially. | Zhongxi Chao Yuefa Wang Jana P. Jakobsen Maria Fernandino Hugo A. Jakobsen | 2012 | Particuology2012，10，1： | 1 |
| 5 | A volume-amending method to improve mass conservation of level set approach for incompressible two-phase flows显示文摘A volume-amending method is developed both to keep the level set function as an algebraic distance function and to preserve the bubble mass in a level set approach for incompressible two-phase flows with the significantly deformed free interface. After the traditional reinitialization procedure, a vol-ume-amending method is added for correcting the position of the interface according to mass loss/gain error until the mass error falls in the allowable range designated in advance. The level set approach with this volume-amending method incorporated has been validated by three test cases: the motion of a single axisymmetrical bubble or drop in liquid, the motion of a two-dimensional water drop falling through the air into a water pool, and the interactional motion of two buoyancy-driven three- dimensional deformable bubbles. The computational results with this volume-amending method in-corporated are in good agreement with the reported experimental data and the mass is well preserved in all cases. | LI XiangYang WANG YueFa YU GengZhi YANG Chao MAO ZaiSha | 2008 | Science China Chemistry2008，51，11： | 1 |
| 6 | Puerarin Protects Dopaminergic Neurons against 6-Hydroxydopamine Neurotoxicity via Inhibiting Apoptosis and Upregulating Glial Cell Line-Derived Neurotrophic Factor in a Rat Model of Parkinson’s Disease显示文摘 | Guoqi Zhu Xuncui Wang Yuefa Chen Shu Yang Hui Cheng Ning Wang Qinglin Li | 2010 | Planta Med2010，，16： | 1 |
| 7 | SE-SMR process performance in CFB reactors: Simulation of the CO2 adsorption/desorption processes with CaO based sorbents显示文摘 | Yuefa Wang Zhongxi Chao De Chen | 2011 | International Journal of Greenhouse Gas Control2011，5，3： | 1 |
| 8 | Measurement of phase holdups in liquid - liquid - solid three-phase stirred tanks and CFD simulation显示文摘 | Wang Feng Mao Zaisha Wang Yuefa | 2006 | Chemical Engineering Science2006，61，22： | 1 |
| 9 | Design and kinematical performance analysis of a 3-RUS/RRR redundantly actuated parallel mechanism for ankle rehabilitation显示文摘 | Wang Congzhe Fang Yuefa Guo Sheng | 2013 | Journal of Mechanisms and Robotics2013，5，4： | 1 |
| 10 | Measurement of phase holdups in liquid-liquid-solid three-phase stirred tanks and CFD simulation 显示文摘 | Wang Feng Mao Zaisha Wang Yuefa | 2006 | Chemical Engineering Science2006，61，22： | 1 |
| 11 | Design and analysis of the gripper mechanism based on generalized parallel mechanisms with configurable moving platform显示文摘Generalized parallel mechanisms with a configurable moving platform have become popular in the research field of parallel mechanism.This type of gripper mechanism can be applied to grasp large or heavy objects in different environments that are dangerous and complex for humans.This study proposes a family of novel(5+1)degrees of freedom(three translations and two rotations plus an additional grasping motion)gripper mechanisms based on the generalized parallel mechanisms with a configurable moving platform.First,the configurable moving platform,which is a closed loop,is designed for grasping manipulation.The hybrid topological arrangement is determined to improve the stiffness of the manipulator and realize high load-to-weight ratios.A sufficient rule based on Lie group theory is proposed to synthesize the mechanism.TTie hybrid limb structure is also enumerated.A family of novel gripper mechanisms can be assembled through the hybrid limbs by satisfying the rule.Two examples of the gripper mechanisms with and without parallelogram pairs are shown in this study.A kinematic analysis of the example mechanism is presented.The workspace shows that the mechanism possesses high rotational capability.In addition,a stiffiiess analysis is performed. | Lin WANG Yuefa FANG Luquan LI | 2021 | Frontiers of Mechanical Engineering2021，16，4： | 0 |
| 12 | A LEVEL SET APPROACH FOR SIMULATION OF BUBBLE MOTION显示文摘A level set approach for computing incompressible two-phase flow is presented with the SIMPLE algorithm incorporated. The motion of gas bubbles in liquid with large density ratio, viscosity ratio and surface tension is numerically simulated and it is found that the computational results are in good agreement with experiments. | Yang Chao, Mao Zaisha, Wang Yuefa and Chen Jiayong (Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing 100080, China) | 2000 | 化工学报2000，51，S1： | 0 |
| 13 | Design and analysis of partially decoupled translational parallel mechanisms with single-loop structures显示文摘This study presents a family of novel translational parallel mechanisms(TPMs)with single-loop topological structures.The proposed mechanism consists of only revolute and prismatic joints.The novel TPMs are simpler in structure and have fewer joints and components than the well-known Delta Robot.Four types of 2-degree of freedom driving systems are applied to different limb structures to avoid the moving actuator that causes the problem of increased moving mass.Four sample TPMs are constructed using the synthesized limbs,and one of them is investigated in terms of kinematic performance.First,a position analysis is performed and validated through numerical simulation to reveal the characteristics of partially decoupled motion,which improves the controllability of TPM.Second,singular configurations are identified,and the resulting singularity curve is obtained.Lastly,the workspace of TPM is analyzed,and the relationship between the singular configurations and the reachable workspace is explored.The workspace of the 3-CRR(C denotes the cylindrical joint and R denotes the revolute joint)translational mechanism is also presented to prove that the proposed TPM has a fairly large workspace. | Lin WANG Yuefa FANG Dan ZHANG Luquan LI | 2022 | Frontiers of Mechanical Engineering2022，17，3： | 0 |
| 14 | Boosting charge separation of BiVO_(4)photoanode modified with 2D metal-organic frameworks nanosheets for high-performance photoelectrochemical water splitting显示文摘Water splitting by photoelectrochemical(PEC)processes to convert solar energy into hydrogen energy using semiconductors is regarded as one of the most ideal methods to solve the current energy crisis and has attracted widespread attention.Herein,Co-based metal-organic framework(Co(bpdc)(H_(2)O)_(4)(CoMOF)nanosheets as passivation layers were in-situ constructed on the surface of Bi VO_(4)films through an uncomplicated hydrothermal method(Co-MOF/Bi VO_(4)).Under AM 1.5G illumination,synthesized CoMOF/BiVO_(4)electrode exhibited a 4-fold higher photocurrent than bare Bi VO_(4),measuring 6.0 m A/cm^(2)at 1.23 V vs.RHE in 1 mol/L potassium borate electrolyte(pH 9.5)solution.Moreover,the Co-MOF/BiVO_(4)film demonstrated a 96%charge separation efficiency,a result caused by an inhibited recombination rate of photogenerated electrons and holes by the addition of Co-MOF nanosheets.This work provides an idea for depositing inexpensive 2D Co-MOF nanosheets on the photoanode as an excellent passivation layer for solar fuel production. | Lina Wang Zejun Liu Jinming Zhang Yuefa Jia Jingwei Huang Qiong Mei Qizhao Wang | 2023 | Chinese Chemical Letters2023，34，6： | 0 |
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