Search

Your search keyword '"Yin, Peng-Cheng"' showing total 25 results
Start Over Author "Yin, Peng-Cheng"
25 results on '"Yin, Peng-Cheng"'

7. Two new triterpenoids from the fruits of Aphanamixis polystachya.

Author

Wu, Shi-Li, Zou, Qiu-Ping, Xie, Xiao-Yan, Ren, Jia-Jia, Fan, Zhang, OuYang, Jing-Rong, Yin, Peng-Cheng, Dong, Fa-Wu, and He, Hong-Ping

Subjects
TRITERPENES, FRUIT, MOLECULAR structure
Abstract

Two new triucallane triterpenoids, polystanin F (1) and polystanin G (2), along with eight known compounds (3-10) were isolated from the fruits of Aphanamixis polystachya. Their structures were established on the basis of extensive spectroscopic analysis. Moreover, eight compounds were evaluated for their in vitro cytotoxicity against three cancer cell lines (liver cancer RT112, colon cancer HCT-116 and breast cancer M231) using the MTT method. Compound 7 showed significant cytotoxic activity against HCT-116 with IC50 1.27 μM. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

9. Design and remote collaboration control of asymmetric rigid-flexible hybrid-driven lower limb rehabilitation robot.

Author

Wang, Ke-yi, Wang, Yan-lin, and Yin, Peng-cheng

Abstract

A double-end lower limb rehabilitation robot is introduced in the paper, which can realize the rehabilitation training of the abduction and abduction, internal rotation and external rotation of human lower limb. The kinematics and dynamics of the robot are analyzed. Based on the motion trajectory planning of the lower limb rehabilitation robot, the motion state and dynamic state of the cable are analyzed. In order to realize the good remote cooperative control between the rehabilitation physician terminal and the patient rehabilitation terminal, the bilateral PD control method and the patient terminal force feedback control method based on the absolute stability theory are analyzed by using the dual-port network model. The simulation results show that the performance of the patient terminal force feedback control method is excellent when the force on the moving platform and the external interference force are changed suddenly. The mapping model of double-ended mechanism is established in the SimMechanics. The simulation results show that the mapping model of double-ended mechanism has a good position tracking ability and their workspaces can meet the requirements of trajectory mapping. The remote collaborative rehabilitation training experiment was done on the established experimental platform. The experimental result shows that the experiment system has a good tracking performance under the guidance of the patient terminal force feedback control method. The feasibility and operability of the remote rehabilitation cooperation technology are verified. [ABSTRACT FROM AUTHOR]

Published
2022
Full Text
View/download PDF

20. Boosted bag and nucleon EM form factors

Author

Yin Peng-cheng and Wang Xing-Min

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Particle physics, Pion, Computer Science::Multimedia, Nuclear Theory, Nucleon
Abstract

Using our Lorentz-boost rule for moving bags, we have calculated the electromagnetic (EM) form factors of the nucleon as well as their modification due to the Cloudy Bag Model. The results seem to be consistent with the data for low Q 2 . The pion EM-form factor is also manipulated, which, however, seems fail to agree with the data.

Published
1984

22. GRADED ALGEBRA SU (l|m|n) AND GAUGE MODEL

Author

Li Xin-zhou, Gu Ming-gao, and Yin Peng-Cheng

Subjects
Quark, High Energy Physics::Lattice, High Energy Physics::Phenomenology, Graded ring, General Physics and Astronomy, Extension (predicate logic), Gauge (firearms), Algebra, Weak model, Order (group theory), Gauge theory, Invariant (mathematics), Mathematical physics, Mathematics
Abstract

We have suggested that the extension of SU (m|n) is to SU (l|m|n). We develop a local gauge theory of the graded algebra SU (l|m|n). We find the restrictions on the gauge potentials and matter fields in order that a physically suitable gauge invariant lag-rangian exists. It is natural to extend the graded algebra SU (2|1) electro weak model to include quarks in a superunified model.

Published
1981

23. PROLATE ELLIPSOLIDAL BAG MODEL FOR THE HADRON WITH HEAVY QUARKNIUM

Author

Bi Pin-Zhen, Wang Jia-Zhu, and Yin Peng-Cheng

Subjects
Quark, Nuclear physics, Physics, Hadron, General Physics and Astronomy, Prolate spheroid, Energy (signal processing)
Abstract

The static prolate ellipsolidal bag model is discussed in this paper, and it is compared with the spherical bag model and the string-like bag model. The relations between the ellipsolid shape and the energy and 2d, the separation between quarks, are obtained. The cases for B=0 and σ=0 are discussed respectively.

Published
1981

24. GENERALIZATION OF QUANTUM EXPANSION OF SOLITON SOLUTIONS

Author

Yin Peng-Cheng

Subjects
Cover (topology), Generalization, Quantum mechanics, Hadron, General Physics and Astronomy, Soliton, Gauge (firearms), Quantum, Mathematical physics, Mathematics
Abstract

As a means of establishing a soliton model based on gauge fields for hadrons, the quantum expansion method for soliton solutions recently propesed by T. D. Lee has been generalized to cover more general systems including gauge fields. Our results are similar to those obtained by T. D. Lee, but some of our quantities have a broades content, as in formula (33) - (37).

Published
1977

Catalog

Books, media, physical & digital resources
See catalog results