Da Chen

Dr. Da Chen

orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

View All Publications
1 May 2017 in Biosensors and Bioelectronics
Verified
Journal Article
Closed access
DCDa Chen
Da Chen
SSShuren Song
Shuren Song
JMJilong Ma
Jilong Ma
ZZZhen Zhang
Zhen Zhang
PWPeng Wang
Peng Wang
Qiuquan GuoQiuquan Guo
Qiuquan Guo

6 May 2024 in IEEE Transactions on Vehicular Technology
Verified
Journal Article
Closed access
QLQiang Liu
Qiang Liu
JMJunsheng Mu
Junsheng Mu
DCDa Chen
Da Chen
RZRonghui Zhang
Ronghui Zhang
YLYijian Liu
Yijian Liu
THTao Hong
Tao Hong
This paper develops a new approach of large language model (LLM) enhanced reconfigurable intelligent surface (RIS), in a bid to achieve energy-efficient and reliable communication in 6G Internet of Vehicles (IoV). It is well known that RIS offers an innovative solution to improve signal quality by intelligently adjusting the propagation path of radio waves. However, configuring RIS in the dynamically changing vehicular environment remains a challenge. This study leverages the analytical capabilities of LLM, combined with key IoV data such as channel status, vehicle movement patterns, and quality of service requirements, to model and optimize RIS-based IoV communication systems. The work focuses on constructing a realtime model of the RIS-based IoV wireless transmission system and proposes an optimal strategy for wireless resource allocation. Through comprehensive simulation results, this paper justifies the significant performance advantages of LLM-enhanced RIS, demonstrating a viable technical pathway for the development of 6G IoV.

1 March 2013 in Biosensors and Bioelectronics
Verified
Journal Article
Closed access
DCDa Chen
Da Chen
JWJingjing Wang
Jingjing Wang
YXYan Xu
Yan Xu
DLDehua Li
Dehua Li
LZLuyin Zhang
Luyin Zhang
ZLZhaoxin Li
Zhaoxin Li

2 October 2022 in Advanced Intelligent Systems
Verified
Journal Article
Open access
YLYang Li
Yang Li
LYLina Yang
Lina Yang
ZHZhanmei He
Zhanmei He
YLYijian Liu
Yijian Liu
HWHongfei Wang
Hongfei Wang
GSGe Song
Ge Song
With advancements in artificial intelligence, wearable motion recognition systems based on flexible nanomaterial sensors exhibit excellent potential for harmonious human–machine interaction. However, the sensing stability and demand of large‐scale arrays limit the application of flexible nanomaterial sensors. Herein, a data glove system based on simple multiwalled carbon nanotube (MWCNT) sensors and a lightweight deep‐learning algorithm to achieve accurate gesture recognition is proposed. A regional‐crack mechanism is introduced through the microspine structure to enhance the strain sensitivity. Moreover, an efficient signal processing strategy based on an adaptive wavelet threshold function to improve the robustness and anti‐interference of signals obtained from MWCNT sensors, which exhibit strong generalization and can be used in other nanomaterial strain sensor. Based on the depth‐wise separable convolution, a novel hybrid convolutional neural network (CNN) long short‐term memory (LSTM) model for gesture recognition is constructed. The proposed model achieves an average accuracy of 97.5% and recognition accuracy of 30 gestures with an average recognition time of 2.173 ms based on only five sensors. The fabricated data glove is a promising platform for low‐cost and wearable human–machine interaction that can be directly interfaced in applications such as robotic hands, smart cars, and first‐person shooting games.

18 August 2021 in Micromachines
Verified
Journal Article
Open access
PDF file
ZSZhuqi Sun
Zhuqi Sun
HFHaoyu Fang
Haoyu Fang
BXBaochun Xu
Baochun Xu
LYLina Yang
Lina Yang
HNHaoran Niu
Haoran Niu
Qiuquan GuoQiuquan Guo
Qiuquan Guo
Continuous monitoring of physical motion, which can be successfully achieved via a wireless flexible wearable electronic device, is essential for people to ensure the appropriate level of exercise. Currently, most of the flexible LC pressure sensors have low sensitivity because of the high Young’s modulus of the dielectric properties (such as PDMS) and the inflexible polymer films (as the substrate of the sensors), which don’t have excellent stretchability to conform to arbitrarily curved and moving surfaces such as joints. In the LC sensing system, the metal rings, as the traditional readout device, are difficult to meet the needs of the portable readout device for the integrated and planar readout antenna. In order to improve the pressure sensitivity of the sensor, the Ecoflex microcolumn used as the dielectric of the capacitive pressure sensor was prepared by using a metal mold copying method. The Ecoflex elastomer substrates enhanced the levels of conformability, which offered improved capabilities to establish intimate contact with the curved and moving surfaces of the skin. The pressure was applied to the sensor by weights, and the resonance frequency curves of the sensor under different pressures were obtained by the readout device connected to the vector network analyzer. The experimental results show that resonant frequency decreases linearly with the increase of applied pressure in a range of 0–23,760 Pa with a high sensitivity of −2.2 MHz/KPa. We designed a coplanar waveguide-fed monopole antenna used to read the information of the LC sensor, which has the potential to be integrated with RF signal processing circuits as a portable readout device and a higher vertical readout distance (up to 4 cm) than the copper ring. The flexible LC pressure sensor can be attached to the skin conformally and is sensitive to limb bending and facial muscle movements. Therefore, it has the potential to be integrated as a body sensor network that can be used to monitor physical motion.

7 January 2021 in Nanomaterials
Verified
Journal Article
Open access
PDF file
PWPeng Wang
Peng Wang
GYGe Yan
Ge Yan
XZXiaodong Zhu
Xiaodong Zhu
YDYingying Du
Yingying Du
DCDa Chen
Da Chen
JZJinjuan Zhang
Jinjuan Zhang
As a representative nanomaterial, C60 and its derivatives have drawn much attention in the field of drug delivery over the past years, due to their unique geometric and electronic structures. Herein, the interactions of hydroxyurea (HU) drug with the pristine C60 and heterofullerene MC59 (M = B, Si, Al) were investigated using the density functional theory calculations. The geometric and electronic properties in terms of adsorption configuration, adsorption energy, Hirshfeld charge, frontier molecular orbitals, and charge density difference are calculated. In contrast to pristine C60, it is found that HU molecule is chemisorbed on the BC59, SiC59, and AlC59 molecules with moderate adsorption energy and apparent charge transfer. Therefore, heterofullerene BC59, SiC59, and AlC59 are expected to be promising carriers for hydroxyurea drug delivery.