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1,294 results on '"Zhang, YuBin"'

1. M2CS: A Microwave Measurement and Control System for Large-scale Superconducting Quantum Processors

Author

Zhang, Jiawei, Sun, Xuandong, Guo, Zechen, Yuan, Yuefeng, Zhang, Yubin, Chu, Ji, Huang, Wenhui, Liang, Yongqi, Qiu, Jiawei, Sun, Daxiong, Tao, Ziyu, Zhang, Jiajian, Guo, Weijie, Jiang, Ji, Linpeng, Xiayu, Liu, Yang, Ren, Wenhui, Niu, Jingjing, Zhong, Youpeng, and Yu, Dapeng

Subjects
Quantum Physics
Abstract

As superconducting quantum computing continues to advance at an unprecedented pace, there is a compelling demand for the innovation of specialized electronic instruments that act as crucial conduits between quantum processors and host computers. Here, we introduce a Microwave Measurement and Control System (M2CS) dedicated for large-scale superconducting quantum processors. M2CS features a compact modular design that balances overall performance, scalability, and flexibility. Electronic tests of M2CS show key metrics comparable to commercial instruments. Benchmark tests on transmon superconducting qubits further show qubit coherence and gate fidelities comparable to state-of-the-art results, confirming M2CS's capability to meet the stringent requirements of quantum experiments run on intermediate-scale quantum processors. The system's compact and scalable design offers significant room for further enhancements that could accommodate the measurement and control requirements of over 1000 qubits, and can also be adopted to other quantum computing platforms such as trapped ions and silicon quantum dots. The M2CS architecture may also be applied to wider range of scenarios, such as microwave kinetic inductance detectors, as well as phased array radar systems.

Published
2024

6. Deep Speech Synthesis from MRI-Based Articulatory Representations

Author

Wu, Peter, Li, Tingle, Lu, Yijing, Zhang, Yubin, Lian, Jiachen, Black, Alan W, Goldstein, Louis, Watanabe, Shinji, and Anumanchipalli, Gopala K.

Subjects
Electrical Engineering and Systems Science - Audio and Speech Processing
Abstract

In this paper, we study articulatory synthesis, a speech synthesis method using human vocal tract information that offers a way to develop efficient, generalizable and interpretable synthesizers. While recent advances have enabled intelligible articulatory synthesis using electromagnetic articulography (EMA), these methods lack critical articulatory information like excitation and nasality, limiting generalization capabilities. To bridge this gap, we propose an alternative MRI-based feature set that covers a much more extensive articulatory space than EMA. We also introduce normalization and denoising procedures to enhance the generalizability of deep learning methods trained on MRI data. Moreover, we propose an MRI-to-speech model that improves both computational efficiency and speech fidelity. Finally, through a series of ablations, we show that the proposed MRI representation is more comprehensive than EMA and identify the most suitable MRI feature subset for articulatory synthesis.

Published
2023

9. Parallel measurements of vibrational modes in a few-layer graphene nanomechanical resonator using software-defined radio dongles

Author

Lu, Heng, Yang, Chen, Tian, Ye, Wang, Jue, Zhang, Ce, Zhang, Yubin, Chen, FengNan, Yan, Ying, and Moser, Joel

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Software-defined radio dongles are small and inexpensive receivers well known to amateur radio enthusiasts. When connected to an antenna, they enable monitoring of a wide range of the radio spectrum by conditioning the input signal and transferring a downconverted version of it to a personal computer for software processing. Here, we employ a composite of two such dongles, interfaced with codes written in MATLAB and GNU Radio, as a measuring instrument to study the flexural vibrations of a few-layer graphene nanomechanical resonator. Instead of an antenna, we connect the dongles to the split output of a photodetector used to detect vibrations optically. We first perform a quantitative analysis of the dynamics of the first vibrational mode. We then measure the response of the first two vibrational modes in parallel. To illustrate our technique, we detect changes in the vibrational amplitude of both modes induced by periodic strain modulation with a delay of $\approx1$ ms between measurements. Last, we show that our software-based instrument can be employed to demodulate human voice encoded in the vibrations of our resonator. For parallel measurements of several frequency channels, and provided that the input signal is not too weak, our composite system may offer an alternative to the use of multiple lock-in amplifiers or multiple spectrum analyzers, with the distinct advantage of being cost-effective per frequency channel., Comment: 16 pages, 11 figures

Published
2022
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10. Quantification of room temperature strengthening of laser shock peened Ni-based superalloy using synchrotron microdiffraction

Author

Zhou, Guangni, Zhang, Yubin, Pantleon, Wolfgang, Kou, Jiawei, Ramamurty, Upadrasta, Tan, Xipeng, Luo, Sihai, He, Weifeng, Ku, Ching-Shun, Chiang, Ching-Yu, Tamura, Nobumichi, and Chen, Kai

Subjects
Engineering, Materials Engineering, Hardening, Dislocation density, Laser treatment, Ni-based superalloys, Synchrotron diffraction, Manufacturing Engineering, Mechanical Engineering, Materials, Materials engineering, Mechanical engineering
Abstract

Laser shock peening (LSP), a surface modification technique, is promising to enhance the strength and wear resistance for Ni-based superalloys. To understand the strengthening mechanism in a laser shock peened Ni-based superalloy DZ417G, we utilize synchrotron poly- and monochromatic X-ray microdiffraction, as well as electron microscopy and microhardness to quantify the local microstructures and mechanical properties at various depths. In the 1.2-mm-deep hardened layer, the microhardness increases monotonically by ∼50% from the unaffected interior to the surface. Quantitative microdiffraction analysis shows that large amounts of dislocations are introduced by LSP. High densities of 7.1 × 1015 m−2 and 11.8 × 1015 m−2 are seen close to the peened surface for the γ- and γ′-phases, respectively, which are 5 and 20 times of those in the unaffected region. Different gradients of dislocation density are observed for the two phases from interior to surface, and their combined effect accounts well for the hardness increment. Due to the unaltered γ′-precipitates and chemical composition in the LSP affected zone, the large density of dislocations dominates the observed strengthening. Combined poly- and monochromatic X-ray microdiffraction allows quantifying the local microstructures of plastic deformation over a large sampling scale that can hardly be achieved using other materials characterization techniques.

Published
2022

25. Reactive Oxygen Species Affect the Tenderness of Bovine Muscle by Regulating Glycolysis during the Early Stage of Postmortem Cold Storage

Author

GUO Yuxuan, CHEN Cheng, SHI Xixiong, GUO Zhaobin, MA Guoyuan, ZHANG Yubin, ZHANG Li, YU Qunli

Subjects
reactive oxygen species, postmortem, bovine muscle, glycolysis, tenderness, tandem mass tag-labeled quantitative proteomics, differential proteins, Food processing and manufacture, TP368-456
Abstract

This study was conducted to investigate the regulatory mechanism of reactive oxygen species (ROS) on the glycolysis pathway of bovine muscle and its impact on meat tenderness at the early stage of postmortem cold storage. Fresh beef was treated with hydrogen peroxide (H2O2) as a major ROS, N-acetyl-L-cysteine (NAC) as an ROS scavenger, or physiological saline as a control before being stored at 4 ℃. After 0.5, 6, 12, 24, and 48 hours, the glycolysis level and tenderness indices were assessed. In addition, tandem mass tag (TMT)-labeled quantitative proteomics was used for protein identification and quantitative analysis of the samples after 24 hours and for screening of differential proteins in the glycolysis pathway. The findings showed that the glycolysis level increased significantly in the H2O2-treated group, and glycogenolysis and lactic acid accumulation were significantly higher than those in the other two groups (P < 0.05). In contrast, the glycolysis process was significantly suppressed by NAC treatment. The H2O2-treated group reached the ultimate pH after 12 hours, 12 and 36 hours earlier than the control and NAC groups, respectively. The shear force of the H2O2-treated group reached its maximum after 12 hours, and the myofibrillar fragmentation index (MFI) was significantly greater than that of the other two groups after 6–48 hours (P < 0.05), indicating that a higher ROS level can accelerate the tenderization of bovine muscle by enhancing the glycolysis capacity during postmortem refrigeration. Totally eight up-regulated proteins and two down-regulated proteins in the glycolysis pathway were identified in the H2O2-treated versus control groups after 24 hours of refrigeration. Among these proteins, the up-regulated core proteins of phosphoglycerate mutase (PGAM), enolase (ENO), and pyruvate dehydrogenase E1 subunit beta (PDHB) coordinated with the down-regulated pyruvate dehydrogenase E1 subunit alpha (PDHA) to accelerate the glycolysis process. In conclusion, ROS can speed up glycolysis and consequently improve meat tenderness by regulating the expression of key proteins in the glycolysis pathway.

Published
2023
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34. Training of public health talents in China in the new situation

Author

ZHANG Yubin, XIANG Yuliang, HE Gengsheng, and CHEN Yingyao

Subjects
public health, talent training, doctor of public health, Medicine
Abstract

The epidemic of the coronavirus disease 2019 （COVID-19） has presented great challenges to the public health throughout the world. Therefore， it is crucial to foster high-level and multi-disciplinary public health talents to further improve public health. Herein， we summarize the current situation and challenges for public health education and prospect the requirements for training public health talents in China. Colleges and universities bear the responsibility for training public health talents， which is essential for the construction of public health system. In this context， we introduce the education for public health and the Doctor of Public Health （DrPH） program at Fudan university.

Published
2023
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47. Reply to: When did mammoths go extinct?

Author

Wang, Yucheng, Prohaska, Ana, Dong, Haoran, Alberti, Adriana, Alsos, Inger Greve, Beilman, David W., Bjørk, Anders A., Cao, Jialu, Cherezova, Anna A., Coissac, Eric, De Sanctis, Bianca, Denoeud, France, Dockter, Christoph, Durbin, Richard, Edwards, Mary E., Edwards, Neil R., Esdale, Julie, Fedorov, Grigory B., Fernandez-Guerra, Antonio, Froese, Duane G., Gusarova, Galina, Haile, James, Holden, Philip B., Kjeldsen, Kristian K., Kjær, Kurt H., Korneliussen, Thorfinn Sand, Lammers, Youri, Larsen, Nicolaj Krog, Macleod, Ruairidh, Mangerud, Jan, McColl, Hugh, Merkel, Marie Kristine Føreid, Money, Daniel, Möller, Per, Nogués-Bravo, David, Orlando, Ludovic, Owens, Hannah Lois, Pedersen, Mikkel Winther, Racimo, Fernando, Rahbek, Carsten, Rasic, Jeffrey T., Rouillard, Alexandra, Ruter, Anthony H., Skadhauge, Birgitte, Svendsen, John Inge, Tikhonov, Alexei, Vinner, Lasse, Wincker, Patrick, Xing, Yingchun, Zhang, Yubin, Meltzer, David J., and Willerslev, Eske

Published
2022
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