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Your search keyword '"Ma, Xiaoshuai"' showing total 11 results
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11 results on '"Ma, Xiaoshuai"'

1. Ultra-rapid broadband mid-infrared spectral tuning and sensing

Author

Ma, Xiaoshuai, Lv, Tianjian, Zhu, Xudong, Yan, Ming, and Zeng, Heping

Subjects
Physics - Optics, Physics - Applied Physics
Abstract

Tunable mid-infrared lasers are essential for optical sensing and imaging. Existing technologies, however, face challenges in simultaneously achieving broadband spectral tunability and ultra-rapid scan rates, limiting their utility in dynamic scenarios such as real-time characterization of multiple molecular absorption bands. Here, we present a high-speed approach for broadband wavelength sweeping in the mid-infrared region, leveraging spectral focusing via difference frequency generation between a chirped fiber laser and an asynchronous, frequency-modulated electro-optic comb. This method enables pulse-to-pulse spectral tuning at a speed of 5.6 THz/us with 380 elements. Applied to spectroscopic sensing, our technique achieves broad spectral coverage (2600-3780 cm-1) with moderate spectral resolution (8 cm-1) and rapid acquisition times (6.3 us). Notably, the controllable electro-optic comb facilitates high scan rates of up to 2 Mscans/s across the full spectral range (corresponding to a speed of 60 THz/us), with trade-offs in number of elements (~30) and spectral point spacing or resolution (33 cm-1). Nevertheless, these capabilities make our platform highly promising for applications such as flow cytometry, chemical reaction monitoring, and mid-IR ranging and imaging., Comment: 10 pages, 5 figures

Published
2025

2. Leg Mechanism Design of a Jumping Robot with Variable Reduction Ratio Joint

Author

Weng, Yicheng, Chen, Xuechao, Yu, Zhangguo, Qi, Haoxiang, Ma, Xiaoshuai, Zhu, Min, Huang, Qiang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Liu, Honghai, editor, Yin, Zhouping, editor, Liu, Lianqing, editor, Jiang, Li, editor, Gu, Guoying, editor, Wu, Xinyu, editor, and Ren, Weihong, editor

Published
2022
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7. An Overload Protector Inspired by Joint Dislocation and Reduction for Shoulder of Humanoid Robot

Author

Aiguo Ming, Runming Zhang, Botao Liu, Qiang Huang, Ma Xiaoshuai, Fei Meng, Ru Kang, and Huaxin Liu

Subjects
musculoskeletal diseases, 0209 industrial biotechnology, Computer science, medicine.medical_treatment, 030229 sport sciences, 02 engineering and technology, medicine.disease, 03 medical and health sciences, 020901 industrial engineering & automation, 0302 clinical medicine, medicine.anatomical_structure, Control theory, medicine, Upper limb, Shoulder joint, Joint dislocation, Impact, Falling (sensation), Joint (geology), Reduction (orthopedic surgery), Humanoid robot
Abstract

Great and sudden force applied to the joint by either a blow or fall, can cause the bones in joint to be displaced or dislocated from normal position, resulting in joint function loss at different degrees. Then joint closed reduction can be operated by trained medical professionals, and fragile joints are protected from impacting damage in this process. Inspired by such principle of dislocation and reduction of human joints, an overload protector applied protect key components from falling down in shoulder joint of humanoid robot is proposed to in this paper. The shoulder joint connects upper limb and shoulder through an overload protector. When a sudden external force applied in upper limb causes great impact on shoulder joint, the overload protector can disengage the connection between the shoulder and the upper limb temporarily, and the normal transmission can continue after closed reduction in a preset period. This process will cycle continuously until the impact force is reduced to the preset safety range. Thereby, it achieves protecting the key components of robot shoulder during falling down. In this paper, the working principle of overload protector is elaborated, its reliability is verified by a series of experiments. The experimental results show that the transmission of overload protector is reliable and stable as a rigid connecting mechanism under low external load, and it can protect the key components from damage by self-detaching when subjected to high external load or sudden impact.

Published
2018
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8. Design of a Super Underactuated Dexterous Robotic Hand

Author

Aiguo Ming, Weimin Zhang, Zhangguo Yu, Qiang Huang, Ma Xiaoshuai, Mingyue Qin, Wenpeng Ding, and Xuechao Chen

Subjects
0209 industrial biotechnology, Underactuation, Computer science, business.industry, Work (physics), GRASP, Robotics, Control engineering, 02 engineering and technology, Degrees of freedom (mechanics), Mechanism (engineering), 020901 industrial engineering & automation, 0202 electrical engineering, electronic engineering, information engineering, Robot, 020201 artificial intelligence & image processing, Artificial intelligence, business, Humanoid robot
Abstract

The development of a dexterous robotic hand is one of the most important research areas in robotics. In order to grasp a variety of objects, the dexterous robot needs more degrees of freedom, so it requires many motors and complicated structures, which leads to an increase in the weight and size of the dexterous robot hand. This article presents a novel super underactuated robotic hand that uses just one motor and has three cooperative fingers with two phalanxes per finger. The three fingers have the same structure, work in a cooperative mechanism and is driven by the single motor, with a total of 6 degrees of freedom. The grasping principle, process and force analysis are given. Force analysis shows that the super underactuated robot hand is valid and could be used as an end-effecter of humanoid robots. The experiment results verify the stability of the novel mechanism.

Published
2018
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11. A Novel Approach to Synthesize Nitrogen-Deficient g-C3N4 for the Enhanced Photocatalytic Contaminant Degradation and Electrocatalytic Hydrogen Evolution.

Author

Li, Xiaoxiao, Zhang, Kailian, Zhou, Man, Yang, Kai, Yang, Shi, Ma, Xiaoshuai, Yu, Changlin, Xie, Yu, Huang, Weiya, and Fan, Qizhe

Subjects
HYDROGEN evolution reactions, ELECTRIC properties, METHYLENE blue, PHYSISORPTION, HYDROGEN, MELAMINE, RHODAMINE B, NITRIDES
Abstract

Graphitic carbon nitride with nitrogen vacancies was successfully synthesized by the three-step method for the calcination of melamine, following urea-assisted hydrothermal and jacjoin calcination approach. The structural, surface, optical and electric properties were characterized by XRD, FT-IR, SEM, TEM, UV–Vis DRS, PL, N2 physical adsorption/desorption and electrochemical methods, which proved that this strategy of modifying g-C3N4 by nitrogen vacancies not only increased the specific surface area, exposed more active sites, but also inhibited the recombination of photogenerated carriers on the surface of photocatalysts, resulting in the enhancement of photocatalytic and electrocatalytic performances. The photocatalytic activities were measured under visible light irradiation (λ > 4 2 0 nm), and their degradation efficiencies could be achieved for 99.8%, 55%, 100% and 99.7% corresponding to that of rhodamine B, acid orange II, methyl orange and methylene blue, respectively. The trapping experiments demonstrated that • O 2 − played an important role in the degradation process. In addition, being an active electrocatalyst, nitrogen-deficient g-C3N4 showed a lower Tafel slope, smaller overpotential and the more effective electrochemical surface area compared with that of bare g-C3N4 in neutral media. This work underlines the importance of defect engineering to promote catalytic performance, which can provide a simple and efficient way for modifying g-C3N4 and other N-based catalysts. In the work, a three-step method for the calcination of melamine, the followed urea-assisted hydrothermal and jacjoin calcination approach have successfully prepared the graphitic carbon nitride with nitrogen vacancies. Defect engineering showed the enhancement of photocatalytic and electrocatalytic performances, which provided simple and efficient way for modifying g-C3N4 and other N-based catalysts. [ABSTRACT FROM AUTHOR]

Published
2020
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