11 research outputs found
A Study of Dance Movement Capture and Posture Recognition Method Based on Vision Sensors
With the development of technology, posture recognition methods have been applied in more and more fields. However, there is relatively little research on posture recognition in dance. Therefore, this paper studied the capture and posture recognition of dance movements to understand the usability of the proposed method in dance posture recognition. Firstly, the Kinect V2 visual sensor was used to capture dance movements and obtain human skeletal joint data. Then, a three-dimensional convolutional neural network (3D CNN) model was designed by fusing joint coordinate features with joint velocity features as general features for recognizing different dance postures. Through experiments on NTU60 and self-built dance datasets, it was found that the 3D CNN performed best with a dropout rate of 0.4, a ReLU activation function, and fusion features. Compared to other posture recognition methods, the recognition rates of the 3D CNN on CS and CV in NTU60 were 88.8% and 95.3%, respectively, while the average recognition rate on the dance dataset reached 98.72%, which was higher than others. The experimental results demonstrate the effectiveness of our proposed method for dance posture recognition, providing a new approach for posture recognition research and making contributions to the inheritance of folk dances. Doi: 10.28991/HIJ-2023-04-02-03 Full Text: PD
The utilization of paper-level classification system on the evaluation of journal impact
CAS Journal Ranking, a ranking system of journals based on the bibliometric
indicator of citation impact, has been widely used in meso and macro-scale
research evaluation in China since its first release in 2004. The ranking's
coverage is journals which contained in the Clarivate's Journal Citation
Reports (JCR). This paper will mainly introduce the upgraded version of the
2019 CAS journal ranking. Aiming at limitations around the indicator and
classification system utilized in earlier editions, also the problem of
journals' interdisciplinarity or multidisciplinarity, we will discuss the
improvements in the 2019 upgraded version of CAS journal ranking (1) the CWTS
paper-level classification system, a more fine-grained system, has been
utilized, (2) a new indicator, Field Normalized Citation Success Index (FNCSI),
which ia robust against not only extremely highly cited publications, but also
the wrongly assigned document type, has been used, and (3) the calculation of
the indicator is from a paper-level. In addition, this paper will present a
small part of ranking results and an interpretation of the robustness of the
new FNCSI indicator. By exploring more sophisticated methods and indicators,
like the CWTS paper-level classification system and the new FNCSI indicator,
CAS Journal Ranking will continue its original purpose for responsible research
evaluation
Air-Induced High-Quality CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> Thin Film for Efficient Planar Heterojunction Perovskite Solar Cells
Efficient
planar heterojunction perovskite solar cells (PHJ–PSCs)
with a structure of ITO/PEDOT:PSS/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>/PCBM/Al were fabricated using air-induced high-quality CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite thin films, in which
the air-inducing process was controlled with a humidity of ∼40%.
The air exposure of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> thin
films could dramatically improve their properties with large grains
and smooth surface, as well as uniform morphology, resulting in an
impressive enhancement in carrier lifetime. The ultraviolet photoelectron
spectroscopy and X-ray photoelectron spectroscopy results proved that
the CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> film was <i>n</i>-doped by the absorption of H<sub>2</sub>O on the surface but was
very stable without obvious degradation for 10 days’ exposure
in air. The power conversion efficiency (PCE) of PHJ–PSCs with
an air exposure process showed a significant increase up to 16.21%
as compared to reference PHJ–PSCs with a PCE of 12.02%. The
research work demonstrated that an air-exposure process with a suitable
humidity could produce high-quality perovskite thin film for efficient
PHJ–PSCs, which may pave a boulevard for fabricating high-efficiency
PHJ–PSCs in atmospheric environment
Interfacial Electronic Structures of Photodetectors Based on C8BTBT/Perovskite
Comprehensive
measurements of ultraviolet photoemission spectroscopy, X-ray photoemission
spectroscopy, X-ray diffraction, and atomic force microscopy are adopted
to investigate the corelevance of energy level alignment, molecular
orientation, and film growth of Au/C8BTBT/perovskite interfaces. A
small energy offset of valence band maximum of 0.06 eV between perovskite
and C8BTBT makes hole transportation feasible. About 0.65 eV upward
shift of energy levels is observed with the deposition of the Au film
on C8BTBT, which enhances hole transportation to the Au electrode.
The observations from the interface analysis are supported by a prototype
photodetector of Au (80 nm)/C8BTBT (20 nm)/perovskite (100 nm) that
exhibits excellent performances whose responsivity can reach up to
2.65 A W<sup>–1</sup>, 4 times higher than the best CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> photodetectors