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The Design of Chaos M-ary Communication Demodulator Based on Hamilton Oscillator
Fu Yongqing,Li Xingyuan 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.3
Previously a novel chaos M-ary digital communication method based on spatiotemporal chaos Hamilton oscillator has been proposed. Without chaos synchronization circumstance, It has performance improvement in bandwidth efficiency, transmission efficiency and anti-white- noise performance compared with traditional communication method. In this paper, the formula for the design of the boundary of zone dividing demodulator in additive white Gaussian noise is derived, besides, the problem about how to determine the boundary of zone dividing demodulator in additive colored noise is deeply studied; Then a solution to construct anti-colored-noise chaos M-ary communication system is proposed, in which a pre-distortion filter is added after the chaos baseband modulator in the transmitter and whitening filter is added before zone dividing demodulator in the receiver. Finally, the chaos M-ary communication system based on Hamilton oscillator is constructed and simulated in different channel noise. The result shows that the proposed method in this paper can improve the anti-colored-noise performance of the whole communication system.
The Influence Analysis of Hamilton Chaos Phase Trajectory in Additive White Noise Channel
Fu Yongqing,Li Xingyuan 보안공학연구지원센터 2016 International Journal of Signal Processing, Image Vol.9 No.2
Previously a novel chaos M-ary modulation and demodulation method based on spatiotemporal chaos Hamilton oscillator was proposed and is applied in M-ary communication. Without chaos synchronization circumstance, the performance of communication has been improved in bandwidth efficiency, transmission efficiency and anti-white- noise performance compared with traditional communication method. Due to the working performance of zone partition demodulator is strictly connected with channel noise, it is necessary to study the influence of Hamilton phase trajectory deeply by the channel noise. In this paper, two methods for designing of the boundary of zone partition demodulator in additive white Gaussian noise are discussed, which are using statistics and curve fitting ways. Therefore, the problem about how to determine the boundary of zone partition demodulator in white noise is solved. Finally, the chaos M-ary communication system based on Hamilton oscillator is constructed and simulated in white noise channel. The result shows that the method proposed in this paper can improve the anti-white-noise performance of the whole communication system.
An optimization approach for black-and-white and hinge-removal topology designs
Yongqing Fu,Xianmin Zhang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.2
An optimization approach for black-and-white and hinge-removal topology designs is studied. To achieve this motive, an optimal topologyallowing grey boundaries is found firstly. When a suitable design has been obtained, this solution is then used as a starting pointfor the follow-up optimization with the goal to free unfavorable intermediate elements. For this purpose, an updated optimality criterionin which a threshold factor is introduced to gradually suppress elements with low density is proposed. The typical optimality method andnew technique proposed are applied to the design procedure sequentially. Besides, to circumvent the one-point hinge connection problemproducing in the process of freeing intermediate elements, a hinge-removal strategy is also proposed. During the optimization, the binaryconstraints on design variables are relaxed based on the scheme of solid isotropic material with penalization. Meanwhile, the meshindependencyfilter is employed to ensure the existence of a solution and remove well-known checkerboards. In this way, a solution thathas few intermediate elements and is free of one-point hinge connections is obtained. Finally, different numerical examples including thecompliance minimization, compliant mechanisms and vibration problems demonstrate the validity of the proposed approach.
OPT-VCG: A Novel Proposal for 3D SoC Test Optimization
Jingbo Shao,Yongqing Fu,Xiaoxiao Liu,Guohui Zhou 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.2
As an emerging technology for on-chip interconnect scaling in vertical direction in semiconductor industry, through-silicon-via (TSV) demonstrates its advantages and has been adopted for 3D SoC implementation. Optimal test architecture and test scheduling are significant for stacked 3D SoC design. However existing design methods cannot achieve both optimal test time and individual rationality. In this paper, game theory based 3D SoC test architecture optimization and test scheduling method is proposed under constraints of the available number of TSVs for test time minimization and rational test band width allocation. VCG algorithm is brought to 3D SoC design. Three kinds of stacked SoCs are built using ITC’02 SoC test benchmarks, and experimental results on them show the advantages of the proposed method over prior work.
Development of signal analysis method for the motional Stark effect diagnostic on EAST
FU, Jia,LYU, Bo,LIU, Haiqing,LI, Yingying,LIU, Dongmei,WEI, Yongqing,FAN, Chao,SHI, Yuejiang,WU, Zhenwei,WAN, Baonian IOP Publishing 2017 Plasma science & technology Vol.19 No.10
<P>A pilot single-channel Motional Stark Effect (MSE) diagnostic has been developed on EAST since 2015. The dual photo-elastic modulators (PEM) were employed to encode the polarization angle into a time-varying signal. The pitch angle was related to the ratio of modulation amplitude at the second harmonic frequency. A digital harmonic analyzer (DHA) technique was developed for extracting the second harmonic amplitude. The results were validated with a hardware phase lock-in amplifier, and is also consistent with the software dual phase-locking algorithm.</P>
A surface acoustic wave-based immunosensing device using a nanocrystalline ZnO film on Si.
Lee, Dae-Sik,Lee, Jun Hwang,Luo, Jikui,Fu, Yongqing,Milne, William I,Maeng, Sunglyul,Jung, Mun Yeon,Park, Sun Hee,Yoon, Hyun C American Scientific Publishers 2009 Journal of nanoscience and nanotechnology Vol.9 No.12
<P>The novelty of this study resides in the fabrication of a bio-sensing device, based on the surface acoustic wave (SAW) on a nanocrystalline ZnO film. The ZnO film was deposited using an rf magnetron sputtering at room temperature on silicon. The deposited films showed the c-axis-oriented crystallite with grain size of approximately 40 nm. The immunosensing device was fabricated using photolithographic protocols on the film. As a model biomolecular recognition and immunosensing, biospecific interaction between a 6-(2,4-dinitrophenyl)aminohexanoic acid (DNP) antigen and its antibody was employed, demonstrating the shifts of resonant frequencies on SAW immunosensing device. The device exhibited a linearity as a function of the antibody concentration in the range of 20-20,000 ng/ml.</P>
Ke Wang,Chao Sun,Povilas Dumčius,Hongxin Zhang,Hanlin Liao,Zhenlin Wu,Liangfei Tian,Wang Peng,Yongqing Fu,Jun Wei,Meng Cai,Yi Zhong,Xiaoyu Li,Xin Yang,Min Cui 한국생체재료학회 2023 생체재료학회지 Vol.27 No.00
Background Blood–brain barrier (BBB) is a crucial but dynamic structure that functions as a gatekeeper for the central nervous system (CNS). Managing sufficient substances across the BBB is a major challenge, especially in the development of therapeutics for CNS disorders. Methods To achieve an efficient, fast and safe strategy for BBB opening, an acoustofluidic transwell (AFT) was developed for reversible disruption of the BBB. The proposed AFT was consisted of a transwell insert where the BBB model was established, and a surface acoustic wave (SAW) transducer realized using open-source electronics based on printed circuit board techniques. Results In the AFT device, the SAW produced acousto-mechanical stimulations to the BBB model resulting in decreased transendothelial electrical resistance in a dose dependent manner, indicating the disruption of the BBB. Moreover, SAW stimulation enhanced transendothelial permeability to sodium fluorescein and FITC-dextran with various molecular weight in the AFT device. Further study indicated BBB opening was mainly attributed to the apparent stretching of intercellular spaces. An in vivo study using a zebrafish model demonstrated SAW exposure promoted penetration of sodium fluorescein to the CNS. Conclusions In summary, AFT effectively disrupts the BBB under the SAW stimulation, which is promising as a new drug delivery methodology for neurodegenerative diseases.