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1. SnFe2O4/ZnIn2S4/PVDF piezophotocatalyst with improved photocatalytic hydrogen production by synergetic effects of heterojunction and piezoelectricity

Author

Ping Su, Dezhi Kong, Huaihao Zhao, Shangkun Li, Dafeng Zhang, Xipeng Pu, Changhua Su, and Peiqing Cai

Subjects
heterojunction, piezophotocatalysis, snfe2o4 (sfo), znin2s4 (zis), polyvinylidene fluoride ((ch2cf2)n, pvdf) film, Clay industries. Ceramics. Glass, TP785-869
Abstract

The polarized electric field inside piezoelectric materials has been proven to be a promising technique to boost photogenerated charge separation. Herein, a novel flexible SnFe2O4/ZnIn2S4/polyvinylidene fluoride ((CH2CF2)n, PVDF) (P–SZ) film piezophotocatalyst was successfully synthesized by combining PVDF, an organic piezoelectric material, with a SnFe2O4/ZnIn2S4 (SFO/ZIS) type II heterojunction photocatalyst. The hydrogen evolution rate of SFO/ZIS heterojunction with a SFO content of 5% is about 846.79 μmol·h−1·g−1, which is 3.6 times that of pristine ZIS. Furthermore, after being combined with PVDF, the optimum hydrogen evolution rate of P–SZ is about 1652.7 μmol·h−1·g−1 in the presence of ultrasound, which exceeds that of 5% SFO/ZIS by an approximate factor of 2.0. Based on experimental results, the mechanism of the improved photocatalytic performance of P–SZ was proposed on the basis of the piezoelectric field in PVDF and the formed heterojunction between SFO and ZIS, which effectively boosted the separation of photoinduced charges. This work provides an efficient strategy for multi-path collection and utilization of natural solar and vibrational energy to enhance photoactivity.

Published
2023
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2. Near-Complete Sampling of Forest Structure from High-Density Drone Lidar Demonstrated by Ray Tracing

Author

Dafeng Zhang, Kamil Král, Martin Krůček, K. C. Cushman, and James R. Kellner

Subjects
forest, drone, lidar, voxel, ray tracing, terrestrial laser scanning, Science
Abstract

Drone lidar has the potential to provide detailed measurements of vertical forest structure throughout large areas, but a systematic evaluation of unsampled forest structure in comparison to independent reference data has not been performed. Here, we used ray tracing on a high-resolution voxel grid to quantify sampling variation in a temperate mountain forest in the southwest Czech Republic. We decoupled the impact of pulse density and scan-angle range on the likelihood of generating a return using spatially and temporally coincident TLS data. We show three ways that a return can fail to be generated in the presence of vegetation: first, voxels could be searched without producing a return, even when vegetation is present; second, voxels could be shadowed (occluded) by other material in the beam path, preventing a pulse from searching a given voxel; and third, some voxels were unsearched because no pulse was fired in that direction. We found that all three types existed, and that the proportion of each of them varied with pulse density and scan-angle range throughout the canopy height profile. Across the entire data set, 98.1% of voxels known to contain vegetation from a combination of coincident drone lidar and TLS data were searched by high-density drone lidar, and 81.8% of voxels that were occupied by vegetation generated at least one return. By decoupling the impacts of pulse density and scan angle range, we found that sampling completeness was more sensitive to pulse density than to scan-angle range. There are important differences in the causes of sampling variation that change with pulse density, scan-angle range, and canopy height. Our findings demonstrate the value of ray tracing to quantifying sampling completeness in drone lidar.

Published
2024
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3. Antifungal and Mechanism of Perilla Essential Oil against Candida tropicalis and Pichia kluyveri

Author

Xiaohong ZHOU, Ting CAI, Zixi LIN, Dafeng ZHANG, Shan ZHANG, and Wenliang XIANG

Subjects
perilla essential oil, fermented vegetables, candida tropicalis, pichia kluyveri, antifungal mechanism, Food processing and manufacture, TP368-456
Abstract

The inhibiting the pellicle formation has always been an important problem that urgently needs to solve the fermented vegetable industry. Perilla essential oil (PEO) has broad-spectrum antimicrobial properties because of its natural bioactive compounds and is widely used in food products. At present study, the main components of PEO were analyzed to explore the antifungal activity of PEO against the film-forming microorganisms Candida tropicalis SH1 and Pichia kluyveri SH2 in fermented vegetables-Sichuan pickle. The antifungal mechanism of PEO was explored by observing cell morphology, cell membrane integrity, intracellular protein leakage and mitochondrial membrane potential changes, and the influence of PEO on the flavor of Sichuan pickle was also measured. The results showed that PEO could not only inhibit the growth of Candida tropicalis and Pichia kluyveri, but also endow fermented vegetables with flavor. The minimum inhibitory concentration (MIC) of PEO against C. tropicalis and Pichia kluyveri were 0.4 μL/mL, and minimum fungicidal concentration (MFC) were 1.6 and 0.8 μL/mL, respectively. After MIC and MFC treatment with PEO, the cell morphology and cell membrane of the strains were changed, the protein concentration increased, and the membrane potential decreased significantly. These results would provide scientific basis and theoretical guidance for the construction and optimization of the preservative method of fermented vegetables.

Published
2023
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4. Construction of Zn-doped RuO2 nanowires for efficient and stable water oxidation in acidic media

Author

Dafeng Zhang, Mengnan Li, Xue Yong, Haoqiang Song, Geoffrey I. N. Waterhouse, Yunfei Yi, Bingjie Xue, Dongliang Zhang, Baozhong Liu, and Siyu Lu

Subjects
Science
Abstract

Abstract Oxygen evolution reaction catalysts capable of working efficiently in acidic media are highly demanded for the commercialization of proton exchange membrane water electrolysis. Herein, we report a Zn-doped RuO2 nanowire array electrocatalyst with outstanding catalytic performance for the oxygen evolution reaction under acidic conditions. Overpotentials as low as 173, 304, and 373 mV are achieved at 10, 500, and 1000 mA cm−2, respectively, with robust stability reaching to 1000 h at 10 mA cm−2. Experimental and theoretical investigations establish a clear synergistic effect of Zn dopants and oxygen vacancies on regulating the binding configurations of oxygenated adsorbates on the active centers, which then enables an alternative Ru−Zn dual-site oxide path of the reaction. Due to the change of reaction pathways, the energy barrier of rate-determining step is reduced, and the over-oxidation of Ru active sites is alleviated. As a result, the catalytic activity and stability are significantly enhanced.

Published
2023
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5. IRSDT: A Framework for Infrared Small Target Tracking with Enhanced Detection

Author

Jun Fan, Jingbiao Wei, Hai Huang, Dafeng Zhang, and Ce Chen

Subjects
infrared image, object detection, target tracking, yolo, KCF, Chemical technology, TP1-1185
Abstract

Currently, infrared small target detection and tracking under complex backgrounds remains challenging because of the low resolution of infrared images and the lack of shape and texture features in these small targets. This study proposes a framework for infrared vehicle small target detection and tracking, comprising three components: full-image object detection, cropped-image object detection and tracking, and object trajectory prediction. We designed a CNN-based real-time detection model with a high recall rate for the first component to detect potential object regions in the entire image. The KCF algorithm and the designed lightweight CNN-based target detection model, which parallelly lock on the target more precisely in the target potential area, were used in the second component. In the final component, we designed an optimized Kalman filter to estimate the target’s trajectory. We validated our method on a public dataset. The results show that the proposed real-time detection and tracking framework for infrared vehicle small targets could steadily track vehicle targets and adapt well in situations such as the temporary disappearance of targets and interference from other vehicles.

Published
2023
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6. High-Performance Na-Ion Storage of S-Doped Porous Carbon Derived from Conjugated Microporous Polymers

Author

Yuquan Li, Bin Ni, Xiaodan Li, Xianghui Wang, Dafeng Zhang, Qingfei Zhao, Jinliang Li, Ting Lu, Wenjie Mai, and Likun Pan

Subjects
Conjugated microporous polymer, S-doped porous carbons, Na-ion batteries, Reaction mechanism, Technology
Abstract

Abstract Na-ion batteries (NIBs) have attracted considerable attention in recent years owing to the high abundance and low cost of Na. It is well known that S doping can improve the electrochemical performance of carbon materials for NIBs. However, the current methods for S doping in carbons normally involve toxic precursors or rigorous conditions. In this work, we report a creative and facile strategy for preparing S-doped porous carbons (SCs) via the pyrolysis of conjugated microporous polymers (CMPs). Briefly, thiophene-based CMPs served as the precursors and doping sources simultaneously. Simple direct carbonization of CMPs produced S-doped carbon materials with highly porous structures. When used as an anode for NIBs, the SCs exhibited a high reversible capacity of 440 mAh g−1 at 50 mA g−1 after 100 cycles, superior rate capability, and excellent cycling stability (297 mAh g−1 after 1000 cycles at 500 mA g−1), outperforming most S-doped carbon materials reported thus far. The excellent performance of the SCs is attributed to the expanded lattice distance after S doping. Furthermore, we employed ex situ X-ray photoelectron spectroscopy to investigate the electrochemical reaction mechanism of the SCs during sodiation–desodiation, which can highlight the role of doped S for Na-ion storage.

Published
2019
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12. MIPI 2023 Challenge on Nighttime Flare Removal: Methods and Results.

Author

Yuekun Dai, Chongyi Li, Shangchen Zhou, Ruicheng Feng, Qingpeng Zhu, Qianhui Sun, Wenxiu Sun, Chen Change Loy, Jinwei Gu, Shuai Liu 0009, Hao Wang 0073, Chaoyu Feng, Luyang Wang, Guangqi Shao, Chenguang Zhang, Xiaotao Wang, Lei Lei, Dafeng Zhang, Xiangyu Kong, Guanqun Liu 0005, Mengmeng Bai, Jia Ouyang, Xiaobing Wang, Jiahui Yuan, Xinpeng Li, Chengzhi Jiang, Ting Jiang, Wenjie Lin, Qi Wu 0017, Mingyan Han, Jinting Luo, Lei Yu, Haoqiang Fan, Shuaicheng Liu, Bo Yan, Zhuang Li, Yadong Li, Hongbin Wang, Soonyong Song, Minghan Fu, Rayyan Azam Khan, Fang-Xiang Wu, Zhao Zhang 0001, Suiyi Zhao, Huan Zheng, Yangcheng Gao, Yanyan Wei, Jiahuan Ren, Bo Wang 0011, Yan Luo, Shuaibo Gao, Wenhui Wu, Sicong Kang, Nikhil Akalwadi, Ankit Raichur, Vinod Patil, Allabakash Ghodesawar, Swaroop Adrashyappanamath, Amogh Joshi, Chaitra Desai, Ramesh Ashok Tabib, Ujwala Patil, Uma Mudenagudi, Sicheng Li, Ruoxi Zhu, Jiazheng Lian, Shusong Xu, Zihao Liu, Sabari Nathan, and Priya Kansal

Published
2023
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13. Lens-to-Lens Bokeh Effect Transformation. NTIRE 2023 Challenge Report.

Author

Marcos V. Conde, Manuel Kolmet, Tim Seizinger, Tom E. Bishop, Radu Timofte, Xiangyu Kong, Dafeng Zhang, Jinlong Wu, Fan Wang 0005, Juewen Peng, Zhiyu Pan, Chengxin Liu, Xianrui Luo, Huiqiang Sun, Liao Shen, Zhiguo Cao 0001, Ke Xian, Chaowei Liu, Zigeng Chen, Xingyi Yang, Songhua Liu, Yongcheng Jing, Michael Bi Mi, Xinchao Wang, Zhihao Yang, Wenyi Lian, Siyuan Lai, Haichuan Zhang, Trung Hoang, Amirsaeed Yazdani, Vishal Monga, Ziwei Luo, Fredrik K. Gustafsson, Zheng Zhao 0004, Jens Sjölund, Thomas B. Schön, Yuxuan Zhao, Baoliang Chen, Yiqing Xu, and JiXiangNiu

Published
2023
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14. NTIRE 2023 Challenge on Image Super-Resolution (×4): Methods and Results.

Author

Yulun Zhang 0001, Kai Zhang 0008, Zheng Chen 0014, Yawei Li 0001, Radu Timofte, Junpei Zhang, Kexin Zhang 0003, Rui Peng, Yanbiao Ma, Licheng Jia, Huaibo Huang, Xiaoqiang Zhou, Yuang Ai, Ran He 0001, Yajun Qiu, Qiang Zhu, Pengfei Li, Qianhui Li, Shuyuan Zhu, Dafeng Zhang, Jia Li 0044, Fan Wang 0005, Chunmiao Li, TaeHyung Kim, Jungkeong Kil, Eon Kim, Yeonseung Yu, Beomyeol Lee, Subin Lee, Seokjae Lim, Somi Chae, Heungjun Choi, Zhi-Kai Huang, YiChung Chen, Yuan-Chun Chiang, Hao-Hsiang Yang, Wei-Ting Chen, Hua-En Chang, I-Hsiang Chen, Chia-Hsuan Hsieh, Sy-Yen Kuo, Ui-Jin Choi, Marcos V. Conde, Sunder Ali Khowaja, Jiseok Yoon, Ik Hyun Lee, Garas Gendy, Nabil Sabor, Jingchao Hou, Guanghui He, Zhao Zhang 0001, Baiang Li, Huan Zheng, Suiyi Zhao, Yangcheng Gao, Yanyan Wei, Jiahuan Ren, Jiayu Wei, Yanfeng Li 0001, Jia Sun, Zhanyi Cheng, Zhiyuan Li, Xu Yao, Xinyi Wang, Danxu Li, Xuan Cui, Jun Cao, Cheng Li 0009, Jianbin Zheng, Anjali Sarvaiya, Kalpesh Prajapati, Ratnadeep Patra, Pragnesh Barik, Chaitanya Rathod, Kishor P. Upla, Kiran B. Raja, Raghavendra Ramachandra, and Christoph Busch 0001

Published
2023
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16. NTIRE 2023 Challenge on Stereo Image Super-Resolution: Methods and Results.

Author

Longguang Wang, Yulan Guo, Yingqian Wang 0002, Juncheng Li 0003, Shuhang Gu, Radu Timofte, Ming Cheng 0002, Haoyu Ma, Qiufang Ma, Xiaopeng Sun, Shijie Zhao 0001, Xuhan Sheng, Yukang Ding, Ming Sun, Xing Wen, Dafeng Zhang, Jia Li 0044, Fan Wang 0005, Zheng Xie, Zongyao He, Zidian Qiu, Zilin Pan, Zhihao Zhan, Xingyuan Xian, Zhi Jin, Yuanbo Zhou, Wei Deng, Ruofeng Nie, Jiajun Zhang, Qinquan Gao, Tong Tong 0001, Kexin Zhang 0003, Junpei Zhang, Rui Peng, Yanbiao Ma, Licheng Jiao, Haoran Bai, Lingshun Kong, Jinshan Pan, Jiangxin Dong, Jinhui Tang 0001, Pu Cao, Tianrui Huang, Lu Yang 0006, Qing Song 0006, Bingxin Chen, Chunhua He, Meiyun Chen, Zijie Guo, Shaojuan Luo, Chengzhi Cao, Kunyu Wang, Fanrui Zhang, Qiang Zhang 0001, Nancy Mehta, Subrahmanyam Murala, Akshay Dudhane, Yujin Wang, Lingen Li, Garas Gendy, Nabil Sabor, Jingchao Hou, Guanghui He, Junyang Chen 0001, Hao Li 0058, Yukai Shi, Zhijing Yang, Wenbin Zou, Yunchen Zhang, Mingchao Jiang, Zhongxin Yu, Ming Tan, Hongxia Gao, Ziwei Luo, Fredrik K. Gustafsson, Zheng Zhao 0004, Jens Sjölund, Thomas B. Schön, Jingxiang Chen, Bo Yang 0047, XiSheryl Zhang, Chenghua Li, Weijun Yuan, Zhan Li 0004, Ruting Deng, Jintao Zeng, Pulkit Mahajan, Sahaj Mistry, Shreyas Chatterjee, Vinit Jakhetiya, Badri N. Subudhi, Sunil Prasad Jaiswal, Zhao Zhang 0001, Huan Zheng, Suiyi Zhao, Yangcheng Gao, Yanyan Wei, Bo Wang 0011, Gen Li 0008, Aijin Li, Lei Sun 0009, Ke Chen, Congling Tang, Yunzhe Li, Jun Chen 0005, Yuan-Chun Chiang, Yi-Chung Chen, Zhi-Kai Huang, Hao-Hsiang Yang, I-Hsiang Chen, Sy-Yen Kuo, Yiheng Wang, Gang Zhu, Xingyi Yang, Songhua Liu, Yongcheng Jing, Xingyu Hu, Jianwen Song, Changming Sun, Arcot Sowmya, Seung Ho Park, Xiaoyan Lei, Jingchao Wang, Chenbo Zhai, Yufei Zhang, Weifeng Cao, and Wenlong Zhang

Published
2023
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18. NTIRE 2023 Challenge on Image Denoising: Methods and Results.

Author

Yawei Li 0001, Yulun Zhang 0001, Radu Timofte, Luc Van Gool, Zhijun Tu, Kunpeng Du, Hailing Wang, Hanting Chen, Wei Li 0002, Xiaofei Wang, Jie Hu 0021, Yunhe Wang 0001, Xiangyu Kong, Jinlong Wu, Dafeng Zhang, Jianxing Zhang, Shuai Liu 0009, Furui Bai, Chaoyu Feng, Hao Wang 0073, Yuqian Zhang, Guangqi Shao, Xiaotao Wang, Lei Lei, Rongjian Xu, Zhilu Zhang, Yunjin Chen, Dongwei Ren, Wangmeng Zuo, Qi Wu 0017, Mingyan Han, Shen Cheng, Haipeng Li, Ting Jiang, Chengzhi Jiang, Xinpeng Li, Jinting Luo, Wenjie Lin, Lei Yu, Haoqiang Fan, Shuaicheng Liu, Aditya Arora, Syed Waqas Zamir, Javier Vazquez-Corral, Konstantinos G. Derpanis, Michael S. Brown, Hao Li 0058, Zhihao Zhao, Jinshan Pan, Jiangxin Dong, Jinhui Tang 0001, Bo Yang 0047, Jingxiang Chen, Chenghua Li, Xi Zhang, Zhao Zhang 0001, Jiahuan Ren, Zhicheng Ji, Kang Miao, Suiyi Zhao, Huan Zheng, Yanyan Wei, Kangliang Liu, Xiangcheng Du, Sijie Liu, Yingbin Zheng, Xingjiao Wu, Cheng Jin 0001, Rajeev Irny, Sriharsha Koundinya, Vighnesh Kamath, Gaurav Khandelwal, Sunder Ali Khowaja, Jiseok Yoon, Ik Hyun Lee, Shijie Chen, Chengqiang Zhao, Huabin Yang, Zhongjian Zhang, Junjia Huang, and Yanru Zhang

Published
2023
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23. NTIRE 2022 Challenge on Stereo Image Super-Resolution: Methods and Results.

Author

Longguang Wang, Yulan Guo, Yingqian Wang 0002, Juncheng Li 0003, Shuhang Gu, Radu Timofte, Liangyu Chen 0002, Xiaojie Chu, Wenqing Yu, Kai Jin, Zeqiang Wei, Sha Guo, Angulia Yang, Xiuzhuang Zhou, Guodong Guo, Bin Dai 0001, Feiyue Peng, Huaxin Xiao, Shen Yan, Yuxiang Liu, Hanxiao Cai, Pu Cao, Yang Nie, Lu Yang 0006, Qing Song 0006, Xiaotao Hu, Jun Xu 0019, Mai Xu, Junpeng Jing, Xin Deng 0002, Qunliang Xing, Minglang Qiao, Zhenyu Guan, Wenlong Guo, Chenxu Peng, Zan Chen, Junyang Chen 0001, Hao Li 0058, Junbin Chen, Weijie Li, Zhijing Yang, Gen Li 0008, Aijin Li, Lei Sun 0009, Dafeng Zhang, Shizhuo Liu, Jiangtao Zhang, Yanyun Qu, Hao-Hsiang Yang, Zhi-Kai Huang, Wei-Ting Chen, Hua-En Chang, Sy-Yen Kuo, Qiaohui Liang, Jianxin Lin, Yijun Wang 0002, Lianying Yin, Rongju Zhang, Wei Zhao, Peng Xiao, Rongjian Xu, Zhilu Zhang, Wangmeng Zuo, Hansheng Guo, Guangwei Gao, Tieyong Zeng, Huicheng Pi, Shunli Zhang, Joohyeok Kim, HyeonA Kim, Eunpil Park, Jae-Young Sim, Jucai Zhai, Pengcheng Zeng, Yang Liu 0165, Chihao Ma, Yulin Huang, and Junying Chen

Published
2022
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24. Efficient and Accurate Quantized Image Super-Resolution on Mobile NPUs, Mobile AI & AIM 2022 Challenge: Report.

Author

Andrey Ignatov, Radu Timofte, Maurizio Denna, Abdel Younes, Ganzorig Gankhuyag, Jingang Huh, Myeong Kyun Kim, Kihwan Yoon, Hyeon-Cheol Moon, Seungho Lee, Yoonsik Choe, Jinwoo Jeong, Sungjei Kim, Maciej Smyl, Tomasz Latkowski, Pawel Kubik, Michal Sokolski, Yujie Ma, Jiahao Chao, Zhou Zhou 0015, Hongfan Gao, Zhengfeng Yang, Zhenbing Zeng, Zhengyang Zhuge, Chenghua Li, Dan Zhu, Mengdi Sun, Ran Duan, Yan Gao, Lingshun Kong, Long Sun, Xiang Li 0103, Xingdong Zhang, Jiawei Zhang 0002, Yaqi Wu, Jinshan Pan, Gaocheng Yu, Jin Zhang, Feng Zhang, Zhe Ma, Hongbin Wang, Hojin Cho, Steve Kim, Huaen Li, Yanbo Ma, Ziwei Luo, Youwei Li, Lei Yu, Zhihong Wen, Qi Wu 0017, Haoqiang Fan, Shuaicheng Liu, Lize Zhang, Zhikai Zong, Jeremy Kwon, Junxi Zhang, Mengyuan Li, Nianxiang Fu, Guanchen Ding, Han Zhu 0003, Zhenzhong Chen, Gen Li 0008, Yuanfan Zhang, Lei Sun 0009, Dafeng Zhang, Neo Yang, Fitz Liu, Jerry Zhao, Mustafa Ayazoglu, Bahri Batuhan Bilecen, Shota Hirose, Kasidis Arunruangsirilert, Luo Ao, Ho Chun Leung, Andrew Wei, Jie Liu 0040, Qiang Liu 0026, Dahai Yu, Ao Li 0007, Lei Luo 0003, Ce Zhu, Seongmin Hong, Dongwon Park, Joonhee Lee, Byeong Hyun Lee, Seunggyu Lee, Se Young Chun, Ruiyuan He, Xuhao Jiang, Haihang Ruan, Xinjian Zhang, Jing Liu 0031, Garas Gendy, Nabil Sabor, Jingchao Hou, and Guanghui He

Published
2022
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25. MIPI 2022 Challenge on Under-Display Camera Image Restoration: Methods and Results.

Author

Ruicheng Feng, Chongyi Li, Shangchen Zhou, Wenxiu Sun, Qingpeng Zhu, Jun Jiang, Qingyu Yang, Chen Change Loy, Jinwei Gu, Yurui Zhu, Xi Wang, Xueyang Fu, Xiaowei Hu, Jinfan Hu, Xina Liu, Xiangyu Chen 0006, Chao Dong 0005, Dafeng Zhang, Feiyu Huang, Shizhuo Liu, Xiaobing Wang, Zhezhu Jin, Xuhao Jiang, Guangqi Shao, Xiaotao Wang, Lei Lei, Zhao Zhang 0001, Suiyi Zhao, Huan Zheng, Yangcheng Gao, Yanyan Wei, Jiahuan Ren, Tao Huang, Zhenxuan Fang, Mengluan Huang, Junwei Xu, Yong Zhang, Yuechi Yang, Qidi Shu, Zhiwen Yang, Shaocong Li, Mingde Yao, Ruikang Xu, Yuanshen Guan, Jie Huang 0017, Zhiwei Xiong, Hangyan Zhu, Ming Liu, Shaohui Liu, Wangmeng Zuo, Zhuang Jia, Binbin Song, Ziqi Song, Guiting Mao, Ben Hou, Zhimou Liu, Yi Ke, Dengpei Ouyang, Dekui Han, Jinghao Zhang, Qi Zhu 0010, Naishan Zheng, Feng Zhao 0004, Wu Jin, Marcos V. Conde, Sabari Nathan, Radu Timofte, Tianyi Xu, Jun Xu 0019, P. S. Hrishikesh, Densen Puthussery, C. V. Jiji, Biao Jiang, Yuhan Ding, WanZhang Li, Xiaoyue Feng, Sijing Chen, Tianheng Zhong, Jiyang Lu, Hongming Chen 0004, Zhentao Fan, and Xiang Chen 0015

Published
2022
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26. AIM 2022 Challenge on Super-Resolution of Compressed Image and Video: Dataset, Methods and Results.

Author

Ren Yang, Radu Timofte, Xin Li 0106, Qi Zhang 0029, Lin Zhang 0013, Fanglong Liu, Dongliang He, Fu Li, He Zheng, Weihang Yuan, Pavel Ostyakov, Dmitry Vyal, Magauiya Zhussip, Xueyi Zou, Youliang Yan, Lei Li 0009, Jingzhu Tang, Ming Chen, Shijie Zhao 0001, Yu Zhu 0004, Xiaoran Qin, Chenghua Li, Cong Leng, Jian Cheng 0001, Claudio Rota, Marco Buzzelli, Simone Bianco 0001, Raimondo Schettini, Dafeng Zhang, Feiyu Huang, Shizhuo Liu, Xiaobing Wang, Zhezhu Jin, Bingchen Li, Mingxi Li, Ding Liu 0001, Wenbin Zou, Peijie Dong, Tian Ye 0001, Yunchen Zhang, Ming Tan, Xin Niu, Mustafa Ayazoglu, Marcos V. Conde, Ui-Jin Choi, Zhuang Jia, Tianyu Xu, Yijian Zhang, Mao Ye 0001, Dengyan Luo, Xiaofeng Pan, and Liuhan Peng

Published
2022
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35. MIPI 2022 Challenge on Under-Display Camera Image Restoration: Methods and Results

Author

Ruicheng Feng, Chongyi Li, Shangchen Zhou, Wenxiu Sun, Qingpeng Zhu, Jun Jiang, Qingyu Yang, Chen Change Loy, Jinwei Gu, Yurui Zhu, Xi Wang, Xueyang Fu, Xiaowei Hu, Jinfan Hu, Xina Liu, Xiangyu Chen, Chao Dong, Dafeng Zhang, Feiyu Huang, Shizhuo Liu, Xiaobing Wang, Zhezhu Jin, Xuhao Jiang, Guangqi Shao, Xiaotao Wang, Lei Lei, Zhao Zhang, Suiyi Zhao, Huan Zheng, Yangcheng Gao, Yanyan Wei, Jiahuan Ren, Tao Huang, Zhenxuan Fang, Mengluan Huang, Junwei Xu, Yong Zhang, Yuechi Yang, Qidi Shu, Zhiwen Yang, Shaocong Li, Mingde Yao, Ruikang Xu, Yuanshen Guan, Jie Huang, Zhiwei Xiong, Hangyan Zhu, Ming Liu, Shaohui Liu, Wangmeng Zuo, Zhuang Jia, Binbin Song, Ziqi Song, Guiting Mao, Ben Hou, Zhimou Liu, Yi Ke, Dengpei Ouyang, Dekui Han, Jinghao Zhang, Qi Zhu, Naishan Zheng, Feng Zhao, Wu Jin, Marcos Conde, Sabari Nathan, Radu Timofte, Tianyi Xu, Jun Xu, P. S. Hrishikesh, Densen Puthussery, C. V. Jiji, Biao Jiang, Yuhan Ding, WanZhang Li, Xiaoyue Feng, Sijing Chen, Tianheng Zhong, Jiyang Lu, Hongming Chen, Zhentao Fan, and Xiang Chen

Published
2023

36. AIM 2022 Challenge on Super-Resolution of Compressed Image and Video: Dataset, Methods and Results

Author

Ren Yang, Radu Timofte, Xin Li, Qi Zhang, Lin Zhang, Fanglong Liu, Dongliang He, Fu Li, He Zheng, Weihang Yuan, Pavel Ostyakov, Dmitry Vyal, Magauiya Zhussip, Xueyi Zou, Youliang Yan, Lei Li, Jingzhu Tang, Ming Chen, Shijie Zhao, Yu Zhu, Xiaoran Qin, Chenghua Li, Cong Leng, Jian Cheng, Claudio Rota, Marco Buzzelli, Simone Bianco, Raimondo Schettini, Dafeng Zhang, Feiyu Huang, Shizhuo Liu, Xiaobing Wang, Zhezhu Jin, Bingchen Li, Mingxi Li, Ding Liu, Wenbin Zou, Peijie Dong, Tian Ye, Yunchen Zhang, Ming Tan, Xin Niu, Mustafa Ayazoglu, Marcos Conde, Ui-Jin Choi, Zhuang Jia, Tianyu Xu, Yijian Zhang, Mao Ye, Dengyan Luo, Xiaofeng Pan, Liuhan Peng, Karlinsky, L, Michaeli, T, Nishino, K, Yang, R, Timofte, R, Li, X, Zhang, Q, Zhang, L, Liu, F, He, D, Li, F, Zheng, H, Yuan, W, Ostyakov, P, Vyal, D, Zhussip, M, Zou, X, Yan, Y, Li, L, Tang, J, Chen, M, Zhao, S, Zhu, Y, Qin, X, Li, C, Leng, C, Cheng, J, Rota, C, Buzzelli, M, Bianco, S, Schettini, R, Zhang, D, Huang, F, Liu, S, Wang, X, Jin, Z, Li, B, Li, M, Liu, D, Zou, W, Dong, P, Ye, T, Zhang, Y, Tan, M, Niu, X, Ayazoglu, M, Conde, M, Choi, U, Jia, Z, Xu, T, Ye, M, Luo, D, Pan, X, and Peng, L

Subjects
Video compression, Image compression, Super-resolution
Abstract

This paper reviews the Challenge on Super-Resolution of Compressed Image and Video at AIM 2022. This challenge includes two tracks. Track 1 aims at the super-resolution of compressed image, and Track 2 targets the super-resolution of compressed video. In Track 1, we use the popular dataset DIV2K as the training, validation and test sets. In Track 2, we propose the LDV 3.0 dataset, which contains 365 videos, including the LDV 2.0 dataset (335 videos) and 30 additional videos. In this challenge, there are 12 teams and 2 teams that submitted the final results to Track 1 and Track 2, respectively. The proposed methods and solutions gauge the state-of-the-art of super-resolution on compressed image and video. The proposed LDV 3.0 dataset is available at https://github.com/RenYang-home/LDV_dataset. The homepage of this challenge is at https://github.com/RenYang-home/AIM22_CompressSR.

Published
2023

37. Efficient and Accurate Quantized Image Super-Resolution on Mobile NPUs, Mobile AI & AIM 2022 Challenge: Report

Author

Andrey Ignatov, Radu Timofte, Maurizio Denna, Abdel Younes, Ganzorig Gankhuyag, Jingang Huh, Myeong Kyun Kim, Kihwan Yoon, Hyeon-Cheol Moon, Seungho Lee, Yoonsik Choe, Jinwoo Jeong, Sungjei Kim, Maciej Smyl, Tomasz Latkowski, Pawel Kubik, Michal Sokolski, Yujie Ma, Jiahao Chao, Zhou Zhou, Hongfan Gao, Zhengfeng Yang, Zhenbing Zeng, Zhengyang Zhuge, Chenghua Li, Dan Zhu, Mengdi Sun, Ran Duan, Yan Gao, Lingshun Kong, Long Sun, Xiang Li, Xingdong Zhang, Jiawei Zhang, Yaqi Wu, Jinshan Pan, Gaocheng Yu, Jin Zhang, Feng Zhang, Zhe Ma, Hongbin Wang, Hojin Cho, Steve Kim, Huaen Li, Yanbo Ma, Ziwei Luo, Youwei Li, Lei Yu, Zhihong Wen, Qi Wu, Haoqiang Fan, Shuaicheng Liu, Lize Zhang, Zhikai Zong, Jeremy Kwon, Junxi Zhang, Mengyuan Li, Nianxiang Fu, Guanchen Ding, Han Zhu, Zhenzhong Chen, Gen Li, Yuanfan Zhang, Lei Sun, Dafeng Zhang, Neo Yang, Fitz Liu, Jerry Zhao, Mustafa Ayazoglu, Bahri Batuhan Bilecen, Shota Hirose, Kasidis Arunruangsirilert, Luo Ao, Ho Chun Leung, Andrew Wei, Jie Liu, Qiang Liu, Dahai Yu, Ao Li, Lei Luo, Ce Zhu, Seongmin Hong, Dongwon Park, Joonhee Lee, Byeong Hyun Lee, Seunggyu Lee, Se Young Chun, Ruiyuan He, Xuhao Jiang, Haihang Ruan, Xinjian Zhang, Jing Liu, Garas Gendy, Nabil Sabor, Jingchao Hou, and Guanghui He

Published
2023

41. 0D/3D ZnIn2S4/Ag6Si2O7 nanocomposite with direct Z-scheme heterojunction for efficient photocatalytic H2 evolution under visible light

Author

Xinxing Ruan, Yihan Zhao, Jiankun Geng, Changhua Su, Dezhi Kong, Xipeng Pu, Dafeng Zhang, and Shujuan Yao

Subjects
Nanocomposite, Materials science, Renewable Energy, Sustainability and the Environment, business.industry, Visible light irradiation, Composite number, Energy Engineering and Power Technology, Heterojunction, Condensed Matter Physics, Electrochemistry, Fuel Technology, Photocatalysis, Water splitting, Optoelectronics, business, Visible spectrum
Abstract

Constructing heterojunction structure is a feasible way to realize an efficient and durable photocatalysts. Herein, a novel Z-scheme zero/three dimensional (0D/3D) ZnIn2S4/Ag6Si2O7 (ZIS/ASO) composite was rationally designed, synthesized and analyzed. ZIS/ASO composite possesses a layer structure for increasing light response, a special 0D/3D structure for reducing the photo-induce carriers migration path, and numerous active sites for absorbing H2O and producing H2. This composite retains the high oxidation and reduction ability by facilitating separation and migration as well as limiting recombination of photo-induced carriers via the intimate interface between ZIS and ASO. Undoubtedly, the synthesized ZIS/ASO photocatalyst achieved a high photocatalytic H2 activity, and the optimum sample shows a satisfactory H2 evolution rate of 590.56 μmol g−1 h−1, distinctly better than that of pure ZIS. More importantly, this composite exhibits high stability and recyclability and is expected to be applied in practical application. Based on the H2 evolution experimental results and electrochemical tests, the Z-scheme heterostructure construction of the composite was confirmed. This work expects to inspire a unique protocol for synthesizing Z-scheme photocatalysts for water splitting under visible light irradiation.

Published
2021

42. Magnetically separable <scp> NiFe 2 O 4 </scp> / <scp> Ag 3 VO 4 </scp> / <scp> Ag 2 VO 2 PO 4 </scp> direct <scp>Z</scp> ‐scheme heterostructure with enhanced visible‐light photoactivity

Author

Zhuang He, Dafeng Zhang, Xipeng Pu, Changhua Su, Guangzhi Hu, Lei Li, and Xun Hu

Subjects
Materials science, Renewable Energy, Sustainability and the Environment, business.industry, General Chemical Engineering, Organic Chemistry, Heterojunction, Pollution, Isotropic etching, Separable space, Inorganic Chemistry, Fuel Technology, Photocatalysis, Optoelectronics, business, Waste Management and Disposal, Biotechnology, Visible spectrum
Published
2021

44. Highly efficient electrochemical hydrogenation of acetonitrile to ethylamine for primary amine synthesis and promising hydrogen storage

Author

Dafeng Zhang, Junxiang Chen, Wen-Fu Fu, Zhongjing Hao, Lei Jiao, Qingfeng Ge, and Xiao-Jun Lv

Subjects
Nitrile, Organic Chemistry, Electrocatalyst, Combinatorial chemistry, Catalysis, chemistry.chemical_compound, Cycloalkane, chemistry, Chemistry (miscellaneous), Amine gas treating, Physical and Theoretical Chemistry, Ethylamine, Acetonitrile, Selectivity
Abstract

Summary Selective nitrile hydrogenation to valuable primary amines under mild conditions is still a great challenge. Herein, we report the synergistic effect of a Cu catalyst and dissolved CO2 to electrochemically hydrogenate acetonitrile to ethylamine with a high selectivity (99%) and faradic efficiency (94%) in an aqueous electrolyte, superior to the best performance reported to date. The results show that a Cu catalyst offers preferential adsorption of the nitrile on the surface through the terminal C≡N group, facilitating the hydrogenation process on this site while suppressing the side reactions. The CO2 in the electrolyte protects the initially formed primary amine by reacting with the NH2 group, preventing it from condensing into amine dimers and trimers. Importantly, the method can be further extended to other aliphatic nitriles with functional groups, including carboxyl, hydroxyl, and cycloalkane, while exciting selectivity (>90%) of the corresponding primary amines was also obtained.

Published
2021

46. Synergistic Effect of CeF3 Nanoparticles Supported on Ti3C2 MXene for Catalyzing Hydrogen Storage of NaAlH4

Author

Dafeng Zhang, Yumei Chen, Baozhong Liu, Guangxin Fan, Yanping Fan, and Zhenluo Yuan

Subjects
Hydrogen storage, Chemical engineering, Chemistry, Kinetics, Materials Chemistry, Electrochemistry, Rational design, Energy Engineering and Power Technology, Chemical Engineering (miscellaneous), Nanoparticle, Dehydrogenation, Electrical and Electronic Engineering, Catalysis
Abstract

The rational design of catalysts is extraordinarily significant for facilitating the dehydrogenation kinetics of NaAlH4. Herein, CeF3 nanoparticles supported on Ti3C2 MXene (CeF3/Ti3C2) were succes...

Published
2021

47. Coralline-like Ni2P decorated novel tetrapod-bundle Cd0.9Zn0.1S ZB/WZ homojunctions for highly efficient visible-light photocatalytic hydrogen evolution

Author

Xipeng Pu, Changhua Su, Hong Lai, Yanling Geng, Zhuwang Shao, Xiaozhen Ren, Hong Li, Dafeng Zhang, and Xiao Meng

Subjects
Morphology (linguistics), Photoluminescence, Materials science, Surface photovoltage, 02 engineering and technology, General Medicine, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Spectral line, 0104 chemical sciences, law.invention, Catalysis, Chemical engineering, law, Photocatalysis, Calcination, 0210 nano-technology
Abstract

In this study, Ni2P-Cd0.9Zn0.1S (NPCZS) composites were synthesized by coupling tetrapod bundle Cd0.9Zn0.1S (CZS) and coralline-like Ni2P (NP) via a simple calcination method. CZS shows outstanding activity in photocatalytic hydrogen evolution (1.31 mmol h−1), owing to its unique morphology and heterophase homojunctions (ZB/WZ), which accelerate the separation and transfer of photogenerated charges. After coupling with NP, the photoactivity of NPCZS was enhanced, and the maximum hydrogen evolution rate of 1.88 mmol h−1 was reached at a NP content of 12 wt%, which was 1.43 times higher than that of pure CZS. The experimental results of the photocatalytic activity, viz. photoluminescence spectra, surface photovoltage spectra, and electrochemical test showed that the enhanced photoactivity of NPCZS should be attributed to the synergistic effects of the novel tetrapod-bundle morphology, heterophase homojunctions, and decoration of the NP co-catalyst. Moreover, the as-prepared NPCZS composites exhibited excellent photostability and recyclability. Herein, we propose a possible mechanism for the enhanced photocatalytic activity.

Published
2021

50. AgFeO2 Nanoparticle/ZnIn2S4 Microsphere p–n Heterojunctions with Hierarchical Nanostructures for Efficient Visible-Light-Driven H2 Evolution

Author

Haohan Fan, Xipeng Pu, Dafeng Zhang, Dezhi Kong, Changhua Su, Shujuan Yao, and Di Yin

Subjects
Materials science, Nanostructure, Renewable Energy, Sustainability and the Environment, business.industry, General Chemical Engineering, Composite number, Nanoparticle, Heterojunction, 02 engineering and technology, General Chemistry, Electron, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Microsphere, Photocatalysis, Environmental Chemistry, Optoelectronics, 0210 nano-technology, business, Visible spectrum
Abstract

The main bottleneck of photocatalytic H2 evolution is the high recombination rate of photoexcited electrons and holes. Herein, a novel composite comprising p-type AgFeO2 nanoparticles loaded on the...

Published
2021

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