Institution
Hunan University
Education•Changsha, China•
About: Hunan University is a education organization based out in Changsha, China. It is known for research contribution in the topics: Catalysis & Computer science. The organization has 40792 authors who have published 44162 publications receiving 863105 citations. The organization is also known as: Húnán Dàxué & Hunan da xue.
Papers published on a yearly basis
Papers
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01 Jun 2008TL;DR: Simulation analyses on several machine learning data sets show the effectiveness of the ADASYN sampling approach across five evaluation metrics.
Abstract: This paper presents a novel adaptive synthetic (ADASYN) sampling approach for learning from imbalanced data sets. The essential idea of ADASYN is to use a weighted distribution for different minority class examples according to their level of difficulty in learning, where more synthetic data is generated for minority class examples that are harder to learn compared to those minority examples that are easier to learn. As a result, the ADASYN approach improves learning with respect to the data distributions in two ways: (1) reducing the bias introduced by the class imbalance, and (2) adaptively shifting the classification decision boundary toward the difficult examples. Simulation analyses on several machine learning data sets show the effectiveness of this method across five evaluation metrics.
2,675 citations
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TL;DR: An in-depth annotation of the newly discovered coronavirus (2019-nCoV) genome has revealed differences between 2019-n coV and severe acute respiratory syndrome (SARS) or SARS-like coronaviruses.
1,864 citations
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TL;DR: In this paper, the authors review the recent progress and challenges of 2D van der Waals interactions and offer a perspective on the exploration of 2DLM-based vdWHs for future application in electronics and optoelectronics.
Abstract: Two-dimensional layered materials (2DLMs) have been a central focus of materials research since the discovery of graphene just over a decade ago. Each layer in 2DLMs consists of a covalently bonded, dangling-bond-free lattice and is weakly bound to neighbouring layers by van der Waals interactions. This makes it feasible to isolate, mix and match highly disparate atomic layers to create a wide range of van der Waals heterostructures (vdWHs) without the constraints of lattice matching and processing compatibility. Exploiting the novel properties in these vdWHs with diverse layering of metals, semiconductors or insulators, new designs of electronic devices emerge, including tunnelling transistors, barristors and flexible electronics, as well as optoelectronic devices, including photodetectors, photovoltaics and light-emitting devices with unprecedented characteristics or unique functionalities. We review the recent progress and challenges, and offer our perspective on the exploration of 2DLM-based vdWHs for future application in electronics and optoelectronics. With a dangling-bond-free surface, two dimensional layered materials (2DLMs) can enable the creation of diverse van der Waals heterostructures (vdWHs) without the conventional constraint of lattice matching or process compatibility. This Review discusses the recent advances in exploring 2DLM vdWHs for future electronics and optoelectronics.
1,850 citations
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TL;DR: An efficient Co3 O4 -based OER electrocatalyst is designed by a plasma-engraving strategy, which not only produced higher surface area, but also generated oxygen vacancies on Co 3 O4 surface with more Co(2+) formed to improve the electronic conductivity and create more active defects for OER.
Abstract: Co3O4, which is of mixed valences Co2+ and Co3+, has been extensively investigated as an efficient electrocatalyst for the oxygen evolution reaction (OER). The proper control of Co2+/Co3+ ratio in Co3O4 could lead to modifications on its electronic and thus catalytic properties. Herein, we designed an efficient Co3O4-based OER electrocatalyst by a plasma-engraving strategy, which not only produced higher surface area, but also generated oxygen vacancies on Co3O4 surface with more Co2+ formed. The increased surface area ensures the Co3O4 has more sites for OER, and generated oxygen vacancies on Co3O4 surface improve the electronic conductivity and create more active defects for OER. Compared to pristine Co3O4, the engraved Co3O4 exhibits a much higher current density and a lower onset potential. The specific activity of the plasma-engraved Co3O4 nanosheets (0.055 mA cm−2BET at 1.6 V) is 10 times higher than that of pristine Co3O4, which is contributed by the surface oxygen vacancies.
1,641 citations
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TL;DR: This review outlined the latest applications of iron oxide nanomaterials in wastewater treatment, and gaps which limited their large-scale field applications, as well as the outlook for potential applications and further challenges.
1,632 citations
Authors
Showing all 41144 results
Name | H-index | Papers | Citations |
---|---|---|---|
Zhong Lin Wang | 245 | 2529 | 259003 |
Feng Zhang | 172 | 1278 | 181865 |
Chad A. Mirkin | 164 | 1078 | 134254 |
Hua Zhang | 163 | 1503 | 116769 |
Ben Zhong Tang | 149 | 2007 | 116294 |
Guangming Zeng | 146 | 1676 | 100743 |
Weihong Tan | 140 | 892 | 67151 |
Han Zhang | 130 | 970 | 58863 |
Yang Liu | 129 | 2506 | 122380 |
Zhen Li | 127 | 1712 | 71351 |
Jie Jin Wang | 120 | 719 | 54587 |
Bo Wang | 119 | 2905 | 84863 |
Xiangfeng Duan | 118 | 441 | 64214 |
Daoben Zhu | 114 | 947 | 62285 |
Xin Li | 114 | 2778 | 71389 |