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5 results on '"Guo, Shaoping"'

1. High electric‐field‐induced strain of SnO2‐modified PLSBZT ceramic for actuator applications.

Author

Guo, Shaoping, Liang, Ruihong, Chen, Zhengran, Shi, Lizhi, Wang, Wugang, and Zhou, Zhiyong

Subjects
*ACTUATORS, *CURIE temperature, *STANNIC oxide, *HIGH temperatures
Abstract

In this study, piezoelectric and ferroelectric properties of the Pb0.931La0.006Sr0.03Ba0.03(Zr0.535Ti0.465)O3–xwt%SnO2 (PLSBZT–xwt%SnO2) with x = 0–0.6 were investigated comprehensively. When the content of SnO2 was 0.55 wt%, the sample achieved optimum properties obtaining a high Curie temperature (259°C) and a large strain (0.203% at 20 kV/cm). In particular, the sample's maximum strain (Smax) remained stable with a variation of less than 4% between −20 and 120°C. Moreover, the PLSBZT–0.55 wt%SnO2 ceramic not only presented a small εr value of 1662, enabling the actuator to respond quickly, but also had a high value of g33 (35.8 × 10−3 V/m/N). These results implied that SnO2‐modified PLSBZT ceramics have significant potential for actuator applications owing to their high Curie temperature, large electric‐field‐induced strain, fast response, and good strain–temperature stability. [ABSTRACT FROM AUTHOR]

Published
2024
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4. RainbowRate: MIMO rate adaptation in 802.11n WiLD links

Author

Junze Han, Fucheng Zhang, Guo Shaoping, Xiang-Yang Li, and Zenghua Zhao

Subjects
business.industry, Computer science, Reliability (computer networking), Distributed computing, Testbed, MIMO, Time division multiple access, Wireless, Throughput, business, Interference (wave propagation), Carrier sense multiple access with collision avoidance, Computer network
Abstract

Legacy 802.11b/g protocols have been successfully applied in wireless long-distance (WiLD) networks to provide low-cost network connectivity for rural areas and developing countries, by designing TDMA MAC protocols. In contrast, we investigate the performance, and enhancement of using 802.11n for WiLD networks still using CSMA/CA. Our extensive experiments from our testbed show that, although 802.11n with CSMA/CA can provide network connectivity in WiLD environment, it suffers from poor performance. We thus propose RainbowRate, an efficient rate adaptation mechanism specified for WiLD links. RainbowRate leverages unique features found in WiLD links. We implement RainbowRate in off-the-shelf platforms and evaluate various aspects of our design using a testbed consisting of 6 mesh routers and 7 long-distance links, with the longest link length 20 km. Our experiment results show that RainbowRate out-performs state-of-the-art RA algorithms (MiRA, Ath9k and Minstrel) significantly in terms of throughput.

Published
2014

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