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Copper oxide-modified highly reversible Zn powder anode for aqueous Zn metal batteries

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Rare Metals 2024年第10期43卷 5005-5016页

作者： guan-qun Liu Biao Fu Zhe-Xuan Liu Lan-Yan Li Shu-Quan Liang Guo-Zhao Fang School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan ProvinceCentral South UniversityChangsha 410083China School of Science Hunan University of Technology and BusinessChangsha 410205China National Energy Metal Resources and New Materials Key Laboratory Central South UniversityChangsha 410083China

With the advantages of mature preparation technology,structural adjustability and suitability for large-scale application,Zn powder anode is considered to be an ideal electrode for realizing low-cost,high-energy-density aqueous Zn metal ***,the high specific surface of Zn powders leads to severe side reactions such as hydrogen evolution and corrosion,thus limiting their widespread use Here,this work develops a novel CuO@Zn powder anode with a synergy effect of surface wrapping and *** powders are uniformly wrapped by small CuO particles due to the strong adsorption between Zn and *** wrapped CuO particles build a good conductive framework to inhibit the structural collapse of the Zn powder caused by corrosion and non-uniform ***,CuO can also be used as a seed to guide the uniform deposition of Zn ions through its strong binding energy with *** a result,the Cu O@Zn anode can maintain a long cyclic life of 900 h at current density of 1 mA·cm^(-2)and capacity of 1 mAh·cm^(-2),as well as contribute to an excellent capacity retention of 92% after 800cycles for CuO@Zn||NH_(4)V_(4)O_(10)full *** at high current density of 5 A·g^(-1),the full cell exhibits a specific capacity of more than 200 mAh·g^(-1)after 800 cycles,with a good capacity retention of 89%.This work provides a new idea for developing high-performance Zn powder-based anodes.

关键词： Zn powder Copper oxide Surface wrapping Zn anode Aqueous Zn metal batteries

Large-scale real-world radio signal recognition with deep learning

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Chinese Journal of Aeronautics 2022年第9期35卷 35-48页

作者： Ya TU Yun LIN Haoran ZHA ju ZHANG Yu WANG guan GUI Shiwen MAO College of Information and Communication Engineering Harbin Engineering UniversityHarbin 150001China College of Electronic Science and Engineering National University of Defense TechnologyChangsha 410073China College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China Department of Electrical and Computer Engineering Auburn UniversityAuburn 36849USA

In the past ten years, many high-quality datasets have been released to support the rapid development of deep learning in the fields of computer vision, voice, and natural language processing. Nowadays, deep learning has become a key research component of the Sixth-Generation wireless systems(6G) with numerous regulatory and defense applications. In order to facilitate the application of deep learning in radio signal recognition, in this work, a large-scale real-world radio signal dataset is created based on a special aeronautical monitoring system-Automatic Dependent Surveillance-Broadcast(ADS-B). This paper makes two main contributions. First, an automatic data collection and labeling system is designed to capture over-the-air ADS-B signals in the open and real-world scenario without human participation. Through data cleaning and sorting, a high-quality dataset of ADS-B signals is created for radio signal recognition. Second, we conduct an in-depth study on the performance of deep learning models using the new dataset, as well as comparison with a recognition benchmark using machine learning and deep learning ***, we conclude this paper with a discussion of open problems in this area.

关键词： Signal recognition Radio signal dataset Automatic Dependent Surveillance-Broadcast(ADS-B) Deep learning Recognition benchmark

Cortical neurogenesis in adult rats after ischemic brain injury: most new neurons fail to mature

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Neural Regeneration Research 2015年第2期10卷 277-285页

作者： Qing-quan Li guan-qun Qiao jun Ma Hong-wei Fan Ying-bin Li Department of Neurosurgery the Second Affiliated Hospital of Nanjing Medical University Department of Neurosurgery the First Hospital of Nanjing Medical University

The present study examines the hypothesis that endogenous neural progenitor cells isolated from the neocortex of ischemic brain can differentiate into neurons or glial cells and contribute to neural regeneration. We performed middle cerebral artery occlusion to establish a model of cerebral ischemia/reperfusion injury in adult rats. Immunohistochemical staining of the cortex 1, 3, 7, 14 or 28 days after injury revealed that neural progenitor cells double-positive for nestin and sox-2 appeared in the injured cortex 1 and 3 days post-injury, and were also positive for glial ifbrillary acidic protein. New neurons were labeled using bromodeoxyuridine and different stages of maturity were identiifed using doublecortin, microtubule-associated protein 2 and neuronal nuclei antigen immunohistochemistry. Immature new neurons coexpressing doublecortin and bromodeoxyuridine were observed in the cortex at 3 and 7 days post-injury, and semi-mature and mature new neurons double-positive for microtubule-associated protein 2 and bromode-oxyuridine were found at 14 days post-injury. A few mature new neurons coexpressing neuronal nuclei antigen and bromodeoxyuridine were observed in the injured cortex 28 days post-injury. Glial ifbrillary acidic protein/bromodeoxyuridine double-positive astrocytes were also found in the injured cortex. Our ifndings suggest that neural progenitor cells are present in the damaged cortex of adult rats with cerebral ischemic brain injury, and that they differentiate into astrocytes and immature neurons, but most neurons fail to reach the mature stage.

关键词： nerve regeneration middle cerebral artery occlusion brain injury neurons astrocytes oligodendrocytes neural progenitor cells proliferation differentiation neurogenesis neural regeneration

Connecting the P300 to the diagnosis and prognosis of unconscious patients

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Neural Regeneration Research 2015年第3期10卷 473-480页

作者： Ran Li Wei-qun Song ju-bao Du Su Huo Gui-xiang Shan Department of Rehabilitation Medicine Xuanwu HospitalCapital Medical University

The residual consciousness of unconscious patients can be detected by studying the P300, a wave among event-related potentials. Previous studies have applied tones, the subject＇s name and other names as stimuli. However, the results were not satisfactory. In this study, we changed the constituent order of subjects＇ two-character names to create derived names. The subject＇s derived names, together with tones and their own names, were used as auditory stimuli in event-related potential experiments. Healthy controls and unconscious patients were included in this study and made to listen to these auditory stimuli. In the two paradigms, a sine tone followed by the subject＇s own name and the subject＇s derived name followed by the subject＇s own name were used as standard and deviant stimuli, respectively. The results showed that all healthy controls had the P300 using both paradigms, and that the P300 in the second paradigm had a longer latency and two peaks. All minimally conscious state patients had the P300 in the first paradigm and the majority of them had the P300 in the second paradigm. Most vegetative state patients had no P300. Patients who showed the P300 in the two paradigms had more residual consciousness, and patients with the two-peak P300 had a higher probability of awakening within a short time. Our experimental findings suggest that the P300 event-related potential could reflect the conscious state of unconscious patients.

关键词： nerve regeneration brain injury cognitive neuroscience event-related potential P300 electrophysiology nutritional state minimally conscious state consciousness disorders of consciousness unconsciousness evaluation prognosis NSFC grants neural regeneration

Acellular porcine corneal matrix as a carrier scaffold for cultivating human corneal epithelial cells and fibroblasts in vitro

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International Journal of Ophthalmology(English edition) 2016年第1期9卷 1-8页

作者： ju zhang Can-Wei Zhang Li-qun Du Xin-Yi Wu Department of Ophthalmology Qilu Hospital of Shandong University Jinan 250012 Shandong Province China The Key Laboratory of Cardiovascular Remodeling and Function Research Chinese Ministry of Education and Chinese Ministry of Health Qilu Hospital of Shandong University Jinan 250012 Shandong Province China

AIM：To investigate the feasibility of corneal anterior lamellar reconstruction with human corneal epithelial cells and fibroblasts,and an acellular porcine cornea matrix（APCM） in vitro.·METHODS：The scaffold was prepared from fresh porcine corneas which were treated with 0.5%sodium dodecyl sulfate（SDS）solution and the complete removal of corneal cells was confirmed by hematoxylin-eosin（HE）staining and 4’,6-diamidino-2-phenylindole（DAPI）*** corneal fibroblasts and epithelial cells were cultured with leaching liquid extracted from APCM,and then cell proliferative ability was evaluated by MTT *** construct a human corneal anterior lamellar replacement,corneal fibroblasts were injected into the APCM and cultured for 3d,followed by culturing corneal epithelial cells on the stroma construction surface for another *** corneal replacement was analyzed by HE staining,and immunofluorescence staining.·R ESULTS：Histological examination indicated that there were no cells in the APCM by HE staining,and DAPI staining did not detect any residual *** leaching liquid from APCM had little influence on the proliferation ability of human corneal fibroblasts and epithelial *** 10d,a continuous 3 to 5 layers of human corneal epithelial cells covering the surface of the APCM was observed,and the injected corneal fibroblasts distributed within the *** phenotype of the construction was similar to normal human corneas,with high expression of cytokeratin 12 in the epithelial cell layer and high expression of Vimentin in the stroma.·CONCLUSION：Corneal anterior lamellar replacement can be reconstructed in vitro by cultivating human corneal epithelial cells and fibroblasts with an acellular porcine cornea *** laid the foundation for the further transplantation in vitro.

关键词： corneal epithelial cells corneal keratocytes acellular porcine cornea matrix corneal tissue engineering limbal epithelial cells

Calculation and Analysis of Near-Field Head-Related Transfer Functions from a Simplified Head-Neck-Torso Model

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Chinese Physics Letters 2012年第3期29卷 124-127页

作者： CHEN Ze-Wei YU guang-Zheng XIE Bo-Sun guan Shan-qun Laboratory of Acoustics Department of PhysicsSchool of ScienceSouth China University of TechnologyGuangzhou 510640 State Key Laboratory of Subtropical Building Science South China University of TechnologyGuangzhou 510640 Telecommunication College Beijing University of Posts and TelecommunicationsBeijing 100876

To evaluate the overall effect of the neck and torso on the head-related transfer function(HRTF),a simplified head-neck-torso(HNT)model,which consists of a spherical head,spherical torso and cylindrical neck,is proposed and the corresponding HRTFs are calculated using the boundary element method(BEM).The results indicate that the HRTF magnitudes for the HNT model are different from those of the existing spherical head-and-torso model(HAT)above 0.5 kHz,especially in the near-field and contralateral *** discrepancy in the HRTF magnitudes leads to a discrepancy in the interaural level differences(ILDs)for the HNT and HAT models,which reaches a level of-l0dB at source distance of *** the source distance increases,the discrepancy in the results of the HNT and HAT models *** on practical HNT and HAT models validates the ***,the neck influences near-field HRTFs and should be included in the near-field HRTF calculation.

关键词： calculation analysis cylindrical

Change in Carbon Dioxide (CO_2) Emissions From Energy Use in China's Iron and Steel Industry

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Journal of Iron and Steel Research International 2011年第6期18卷 31-36页

作者： SUN Wen-qiang CAI Jiu-ju MAO Hu-jun guan Duo jiao State Environmental Protection Key Laboratory of Eco Industry Institute of Thermal and Environmental Engineering Northeastern University Shenyang 110819 Liaoning China Department of Energy and Power Engineering Shenyang Institute of Engineering Shenyang 110136 Liaoning China

As the largest energy consuming manufacturing sector and one of the most important sources of carhon dioxide （CO2） emissions, the China＇s iron and steel industry has paid attention to the study of changing trend and influencing factors of CO2 emissions from energy use. The logarithmic mean Divisia index （LMD1） technique is used to decompose total change in CO2 emissions into four factors： emission factor effect, energy structure effect, energy consumption effect, and steel production effect. The results show that the steel production effect is the major factor which is responsible for the rise in CO2 emissions; whereas the energy consumption effect contributes most to the reduction in CO2 emissions. And the emission factor effect makes a weak negative contribution to the increase of CO2 emis- sions. To find out the detailed relationship between change in energy consumption or steel production and change in CO2 emissions, the correlation equations are also proposed.

关键词： CO2 emissions energy use LMDI technique steel production energy consumption

Two new olean-type triterpene fatty esters from Scorzonera mongolica

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Chinese Chemical Letters 2007年第6期18卷 708-710页

作者： Bin Wang Guo Qiang Li Pei ju Qiu Hua Shi guan Institute of Marine Drugs and Food of Ocean University of China Qingdao 266003 China

Two new triterpene fatty esters, 3β-tetradecanoyl moradiol 1 and 3β-dodecanoyl moradiol 2, were isolated from Scorzonera mongolica. Their structures were elucidated as 3β-tetradecanoyloxy-28-hydroxylolean-18-ene and 3β-dodecanoyl-28-hydroxyl-olean-18-ene on the basis of IR, MS, 1D NMR and extensive 2D NMR spectroscopic analyses.

关键词： Scorzonera mongolica Moradiol Triterpene fatty esters

A colorimetric and ratiometric fluorescent chemosensor based on furan-pyrene for selective and sensitive sensing Al^(3+)

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Chinese Chemical Letters 2016年第11期27卷 1673-1678页

作者： Yuan Zhang Yuan Fang Nai-Zhang Xu Ming-qun Zhang guan-Zhi Wu Cheng Yao College of Chemistry and Molecular Engineering Nanjing Tech University College of Overseas Education Nanjing Tech University State Key Laboratory of Coordination Chemistry Nanjing University

A new pyrene derivative BF bearing a furan group was synthesized via a one-step reaction as a colorimetric and ratiometric chemosensor for Al3＋ in ethanol-H20 （9：1, v/v, pH 7.2, HEPES buffer） solution. This chemosensor could selectively recognize Al3＋ in the presence of other competing ions. Low limit of detection （LOD） and high association constant revealed its superior sensitivity and binding affinity toward Al3＋, Besides, the probe BF performed perfectly in a reversibility test using EDTA. The mechanism of the interaction has been confirmed by 1H NMR titration. Importantly, chemosensor BF has also been utilized to detect Al3＋ on test paper strips, which showed its ootential for practical applications.

关键词： Pyrene Al3+ Colorimetric Ratiometric Chemosensor Application