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2,697 results on '"Li, Jiaming"'

111. Sample multiplexing-based targeted pathway proteomics with real-time analytics reveals the impact of genetic variation on protein expression

Author

Yu, Qing, Liu, Xinyue, Keller, Mark P., Navarrete-Perea, Jose, Zhang, Tian, Fu, Sipei, Vaites, Laura P., Shuken, Steven R., Schmid, Ernst, Keele, Gregory R., Li, Jiaming, Huttlin, Edward L., Rashan, Edrees H., Simcox, Judith, Churchill, Gary A., Schweppe, Devin K., Attie, Alan D., Paulo, Joao A., and Gygi, Steven P.

Published
2023
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113. Factors associated with viral RNA shedding and evaluation of potential viral infectivity at returning to school in influenza outpatients after treatment with baloxavir marboxil and neuraminidase inhibitors during 2013/2014–2019/2020 seasons in Japan: an observational study

Author

Li, Jiaming, Wagatsuma, Keita, Sun, Yuyang, Sato, Isamu, Kawashima, Takashi, Saito, Tadashi, Shimada, Yasushi, Ono, Yasuhiko, Kakuya, Fujio, Nagata, Nobuo, Minato, Michiyoshi, Kodo, Naoki, Suzuki, Eitaro, Kitano, Akito, Tanaka, Toshihiro, Aoki, Satoshi, Chon, Irina, Phyu, Wint Wint, Watanabe, Hisami, and Saito, Reiko

Published
2023
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115. Cooling a Fermi gas with three-body recombination near a narrow Feshbach resonance

Author

Peng, Shuai, Liu, Haotian, Li, Jiaming, and Luo, Le

Subjects
Condensed Matter - Quantum Gases
Abstract

Three-body recombination is a phenomenon common in atomic and molecular collisions, producing heating in the system. However, we find the cooling effect of the three-body recombination of a 6Li Fermi gas near its s-wave narrow Feshbach resonance. Such counter-intuitive behavior is explained as follows, the threshold energy of the quasi-bounded Feshbach molecule acts as the knife of cooling, expelling the scattering atoms with selected kinetic energy from the trap. When the threshold energy happens to be larger than 3/2kBT, each lost atom in the three-body recombination process has more than 3kBT energy which results in cooling. The best cooling is found with the threshold energy set at about 3kBT, consistent with a theoretical model. The three-body recombination induced cooling raises potential applications for cooling complex atomic systems.

Published
2021

134. Frequency-aware Discriminative Feature Learning Supervised by Single-Center Loss for Face Forgery Detection

Author

Li, Jiaming, Xie, Hongtao, Li, Jiahong, Wang, Zhongyuan, and Zhang, Yongdong

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Face forgery detection is raising ever-increasing interest in computer vision since facial manipulation technologies cause serious worries. Though recent works have reached sound achievements, there are still unignorable problems: a) learned features supervised by softmax loss are separable but not discriminative enough, since softmax loss does not explicitly encourage intra-class compactness and interclass separability; and b) fixed filter banks and hand-crafted features are insufficient to capture forgery patterns of frequency from diverse inputs. To compensate for such limitations, a novel frequency-aware discriminative feature learning framework is proposed in this paper. Specifically, we design a novel single-center loss (SCL) that only compresses intra-class variations of natural faces while boosting inter-class differences in the embedding space. In such a case, the network can learn more discriminative features with less optimization difficulty. Besides, an adaptive frequency feature generation module is developed to mine frequency clues in a completely data-driven fashion. With the above two modules, the whole framework can learn more discriminative features in an end-to-end manner. Extensive experiments demonstrate the effectiveness and superiority of our framework on three versions of the FF++ dataset., Comment: 10 pages,6 figures;cvpr accept

Published
2021

136. Characterization of the magnetic field through the three-body loss near a narrow Feshbach resonance

Author

Chen, Yang, Peng, Shuai, Gong, Hongwei, Zhang, Xiao, Li, Jiaming, and Luo, Le

Subjects
Condensed Matter - Quantum Gases
Abstract

The narrow s-wave Feshbach resonance of a $^6$Li Fermi gas shows strong three-body loss, which is proposed to be used to measure the minute change of a magnetic field around the resonance. However, the eddy current will cause ultracold atom experiencing a magnetic field delayed to the desired magnetic field from the current of the magnetic coils. The elimination of the eddy current effect will play a key role in any experiments that motivated to measure the magnetic field to the precision of a part per million stability. Here, we apply a method to correct the eddy current effect for precision measurement of the magnetic field. We first record the three-body loss influenced by the effect of induced eddy current, then use a certain model to obtain the time constant of the actual magnetic field by fitting the atom loss. This precisely determines the actual magnetic field according to the time response of the three-body loss. After that, we implement the desired magnetic field to the atoms so that we can analyze the three-body loss across the whole narrow Feshbach resonance. The results show that the three-body recombination is the dominated loss mechanism near the resonance. We expect this practical method of correcting the eddy current error of the magnetic field can be further applied to the future studies of quantum few- and many-body physics near a narrow Feshbach resonance.

Published
2021
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137. Decompose, Then Reconstruct: A Framework of Network Structures for Click-Through Rate Prediction

Author

Li, Jiaming, Lang, Lang, Zhu, Zhenlong, Wang, Haozhao, Li, Ruixuan, Xu, Wenchao, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Koutra, Danai, editor, Plant, Claudia, editor, Gomez Rodriguez, Manuel, editor, Baralis, Elena, editor, and Bonchi, Francesco, editor

Published
2023
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