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7,848 results on '"Dong Zhi"'

207. Systemic immune inflammation index and system inflammation response index are potential biomarkers of atrial fibrillation among the patients presenting with ischemic stroke

Author

Lin, Kai-bin, Fan, Feng-hua, Cai, Ming-qi, Yu, Yin, Fu, Chuan-liang, Ding, Lu-yue, Sun, Yu-dong, Sun, Jia-wen, Shi, Yong-wang, Dong, Zhi-feng, Yuan, Min-Jie, Li, Shuai, Wang, Yan-peng, Chen, Kan-kai, Zhu, Ji-ni, Guo, Xin-wei, Zhang, Xue, Zhao, Yu-wu, Li, Jing-bo, and Huang, Dong

Published
2022
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234. A unified recovery bound estimation for noise-aware Lq optimization model in compressed sensing

Author

Dong, Zhi-Long, Yang, Xiaoqi, and Dai, Yu-Hong

Subjects
Mathematics - Optimization and Control
Abstract

In this letter, we present a unified result for the stable recovery bound of Lq(0 < q < 1) optimization model in compressed sensing, which is a constrained Lq minimization problem aware of the noise in a linear system. Specifically, without using the restricted isometry constant (RIC), we show that the error between any global solution of the noise-aware Lq optimization model and the ideal sparse solution of the noiseless model is upper bounded by a constant times the noise level,given that the sparsity of the ideal solution is smaller than a certain number. An interesting parameter {gamma} is introduced, which indicates the sparsity level of the error vector and plays an important role in our analysis. In addition, we show that when {\gamma} > 2, the recovery bound of the Lq (0 < q < 1) model is smaller than that of the L1 model, and the sparsity requirement of the ideal solution in the Lq(0 < q < 1) model is weaker than that of the L1 model., Comment: 5 pages, no figure

Published
2016

250. Harnessing Visible Light for CO2Conversion: The Role of Highly Reduced Phosphomolybdate Crystals as Powerful Photocatalysts

Author

Zhu, Yin-Hua, Yang, Jian-Bo, Dong, Zhi-Ming, Mei, Hua, and Xu, Yan

Abstract

Heterogeneous photocatalysts, characterized by well-defined atomic structures and the capacity for rapid, directional electron transfer, are pivotal in the exploration and development of highly efficient systems for visible-light-driven diluted CO2reduction. Herein, we constructed highly reduced phosphomolybdates crystalline materials 1–3to help this process, with the formula of [Co2(C8N3H7)4][Co2(C8N3H7)4(H2O)2][Co(H7P4Mo6O31)2]·8H2O (1), [Ni2(C8N3H7)4(H2O)2][Ni2(C8N3H7)4][Ni(H2O)4][Ni(H6P4Mo6O31)2]·3H2O·2C2H5OH (2), and [Zn2(C8N3H7)2][Zn2(C8N3H7)4][Zn2(C8N3H7)2(H2O)2][Zn(H5P4Mo6O31)2] (3) [C8N3H7= 2-(1H-pyrazol-3-yl)pyridine]. Specifically, catalyst 1demonstrated a CO production rate of 3276.4 μmol g–1h–1in an environment with 20% CO2concentration, and an impressively elevated rate of 10740.3 μmol g–1h–1in a pure CO2atmosphere. Steady-state photoluminescence spectroscopy revealed that the directional migration of photoelectrons from the Ru complexes to the catalyst was instrumental in enhancing the catalytic activity. This study provides valuable insights into the rational operation of low-concentration CO2conversion treatment and the design and synthesis of photocatalysts.

Published
2024
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