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Template-free preparation of porous Co microfibers from spent lithium-ion batteries as a promising microwave absorber

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Rare Metals 2022年第10期41卷 3475-3485页

作者： Xiao-Min Wu Fei Xie yong-Lin yao Yue Sun Zhong-Sheng Hua Zhuo Zhao yong-Xiang Yang Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling School of Metallurgical EngineeringAnhui University of TechnologyMaanshan243002China Department of Materials Science and Engineering Delft University of TechnologyDelft2628CDNetherlands

In order to take full advantage of the secondary resources,in this paper,we reported a template-free process to prepare porous Co microfibers from spent lithiumion batteries(LIBs).First,the waste LiCoO_(2) powders were leached by oxalic acid at a suitable temperature,and rodlike cobalt oxalate powders were ***,the porous Co microfibers were prepared by using the cobalt oxalate as precursors through a thermal decomposition at420 ℃ under nitrogen *** prepared Co microfibers possess diameters of 1-2 μm,and each microfiber consists of small particles with size of100-200 *** Co microfibers(25 wt%)/paraffin composite exhibited excellent microwave absorption *** the sample thickness is 4.5 mm,the reflection losses reach-36.14 and-38.20 dB at 4.16 and 17.60 GHz,respectively,and the effective bandwidth reaches up to 5.52 *** indicates that the Co microfibers can be used as a promising microwave ***,this paper demonstrates a novel process to make a high value-added product through recycling from the spent lithium-ion *** addition,it is advantageous to eliminate the hazard of spent lithium-ion batteries and electromagnetic radiation to environment and human health.

关键词： Spent lithium-ion batteries(LIBs) Co microfibers Recycling Oxalic acid leaching Microwave absorption

Negative effects of transthyretin in high myopic vitreous on diabetic retinopathy

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International Journal of Ophthalmology(English edition) 2017年第12期10卷 1864-1869页

作者： Jun Shao yong yao* Departm ent of Ophthalmology W uxi People’s Hospital Aflicted to Nanjing Medical UniversityWuxi 214023Jiangsu ProvinceChina

AIM：To analyze the relationship between vitreous transthyretin（TTR） levels,high myopia and diabetic retinopathy（DR）.METHODS：We selected 6722 individuals from the southern Jiangsu Province for diabetes and ophthalmic *** TTR concentration in the vitreous of 50 patients with high myopia and diabetes,50 patients with only DR,and 20 healthy controls were determined by *** factors in Tie2 pathway in DR development including vascular endothecial growth factor（VEGF）,Tie2,Angpt1,Angpt2,vascular endothelial growth factor receptor（VEGFR） 1 and VEGFR2 were also detected by ***：The prevalence of DR in patients with diabetes and myopia [〈6.00 diopter（D）],diabetes and high myopia（〉6.00 D）,and diabetes without myopia were 11.1%,2.5%,and 60.0%,*** vitreous TTR concentration of patients with diabetes and high myopia was approximately 6.5-and 4.2-times higher than those of patients with DR and healthy controls,respectively（P〈0.05）.Following the vitreous TTR concentration,the levels of VEGF,Tie2,Angpt1,Angpt2,VEGFR1 and VEGFR2 in vitreous of diabetes and high myopia patients,DR patients and healthy controls were detected as dramatically ***：The results suggest that TTR can affect the vitreous contents of key factors in Tie2 pathway for neovascularization,and there should be a protective association between abundant TTR levels in the vitreous of highly myopic patients and a decreased risk of DR.

关键词： transthyretin diabetic retinopathy highmyopia protective

Repression of retinal microvascular endothelial cells by transthyretin under simulated diabetic retinopathy conditions

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International Journal of Ophthalmology(English edition) 2016年第6期9卷 809-815页

作者： Jun Shao yong yao* Department of Ophthalmology Wuxi People's Hospital Affiliated to Nanjing Medical University

AIM： To investigate biological effects of transthyretin （TTR） on the development of neovascularization under simulated diabetic retinopathy （DR） condition associated with high glucose and hypoxia. METHODS： Human retinal microvascular endothelial cells （hRECs） were cultured in normal and simulated DR environments with high glucose and hypoxia. The normal serum glucose concentration is approximately 5.5 mmol/L; thus, hyperglycemia was simulated with 25 mmol/L glucose, while hypoxia was induced using 200 μmol/L CoCI. The influence of TTR on hRECs and human retinal pigment epithelial cells （hRPECs） was determined by incubating the cells with 4μmol/L TTR in normal and abnormal media. A co -culture system was then employed to evaluate the effects of hRPECs on hRECs. RESULTS： Decreased hRECs and hRPECs were observed under abnormal conditions, including high- glucose and hypoxic media. In addition, hRECs were significantly inhibited by 4 pmol/L exogenous TTR during hyperglycemic culture. During co-culture, hRPECs inhibited hRECs in both the normal and abnormal environments. CONCLUSION： hREC growth is inhibited by exogenous TTR under simulated DR environments with highglucose and hypoxic, particularly in the medium containing 25 mmol/L glucose, hRPECs, which manufacture TTR in the eye, also represses hRECs in the same environment. TTR is predicted to inhibit the proliferation of hRECs and neovascularization.

关键词： transthyretin diabetic retinal human retinalmicrovascular endothelial cells human retinal pigmentepithelial cells hyperglycemia hypoxia

From our roots, we grow

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Zoological Research 2019年第6期40卷 471-475页

作者： yong-Gang yao Hua Shen Kunming Institute of Zoology Chinese Academy of SciencesKunming Yunnan 650223China

Located at the head of the Indo-Burma biodiversity hotspot,the Kunming Institute of Zoology (KIZ), Chinese Academy of Sciences (CAS), serves as China’s main center for research into the diverse animal and ecological ... 详细信息

关键词： Kunming Institute of Zoology ecological resources

Observer-Based Control for a Cable-Driven Aerial Manipulator under Lumped Disturbances

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Computer Modeling in Engineering & Sciences 2023年第5期135卷 1539-1558页

作者： Li Ding yong yao* Rui Ma College of Mechanical Engineering Jiangsu University of TechnologyChangzhou213000China

With the increasing demand for interactive aerial operations,the application of aerial manipulators is becoming more ***,there are a few critical problems on how to improve the energetic efficiency and pose control of the aerialmanipulator forpractical *** this paper,a novel cable-drivenaerialmanipulatorused for remote water sampling is proposed and then its rigid-flexible coupling dynamics model is constructed which takes joint flexibility into *** achieve high precision joint position tracking under lumped disturbances,a newly controller,which consists of three parts:linear extended state observer,adaptive super-twisting strategy,and fractional-order nonsingular terminal sliding mode control,is *** linear extended state observer is adopted to approximate unmeasured states and unknown lumped disturbances and achieve model-free control *** adaptive super-twisting strategy and fractional-order nonsingular terminal sliding mode control are combined together to achieve good control performance and counteract chattering *** Lyapunovmethod is utilized to prove the overall stability and convergence of the ***,various visualization simulations and ground experiments are conducted,verifying the effectiveness of our strategy,and all outcomes demonstrate its superiorities over the existing control strategies.

关键词： Aerial manipulator cable-driven adaptive super-twisting linear extend state observer fractional-order nonsingular terminal sliding mode

Transition-layer Solutions of Quasilinear Elliptic Boundary Blow-up Problems and Dirichlet Problems

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Acta Mathematica Sinica,English Series 2011年第11期27卷 2177-2190页

作者： Zong Ming GUO yao yong yao*N Department of Mathematics He＇nan Normal University Xinxiang 453007 P. R. China

We study profiles of positive solutions for quasilinear elliptic boundary blow-up problems and Dirichlet problems with the same equation：where ω 〉 0, a（x） is a continuous function satisfying 0 〈 a（x）〈 1 for x ∈Ω, Ω is a bounded smooth domain in R^N. We will see that the profile of a minimal positive boundary blow-up solution of the equation shares some similarities to the profile of a positive minimizer solution of the equation with homogeneous Dirichlet boundary condition.

关键词： Quasilinear elliptic boundary blow-up problems quasilinear elliptic Dirichlet problems transition-layer solutions minimizer solutions

Active targeted drug delivery system constructed from functionalized pillararenes for chemo/photodynamic synergistic therapy

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FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING 2024年第11期18卷 138-138页

作者： Lu, Bing Huang, Yuying Xia, Jiachen yao, yong Nantong Univ Coll Chem & Chem Engn Nantong 226019 Peoples R China

Nowadays, although functionalized pillararenes have been widely designed to be used in drug delivery system, targeted group modified pillararenes have been seldom reported and used in tumor multimodal therapy. Herein, a functionalized pillararene with a polyethylene glycol chain and triphenylphosphonium cation WP5-PEG-TPP was designed and synthesized. Subsequently, an active targeted drug delivery system was constructed based on its host-guest interactions with a newly designed porphyrin derivative, Py-Por. The experimental results demonstrated that this drug delivery system has exhibited excellent targeting ability against tumor cells, but interestingly it could not enter normal cells. After loading the hypoxia-activated prodrug tirapazamine, the prepared nanodrugs displayed high lethality to tumor cells due to their chemo/photodynamic synergistic therapy capability, but negligible toxicity to normal cells. Preliminary therapeutic mechanism study elucidated the synergistic therapy process.

关键词： durg delivery system active targeting pillararene chemo/photodynamic synergistic therapy

A study on coherent structures and drag-reduction in the wall turbulence with polymer additives by TRPIV

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Acta Mechanica Sinica 2013年第4期29卷 485-493页

作者： Xin-Lei Guan Shi-yong yao* Nan Jiang Department of Mechanics Tianjin University Tianjin Key Laboratory of Modern Engineering Mechanics The State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences Nankai University-Tianjin University Center for Liu Hui Applied Mathematics

An experimental measurement was performed us- ing time-resolved particle image velocimetry （TRPIV） to in- vestigate the spatial topological character of coherent struc- tures in wall-bounded turbulence of polymer additive solu- tion. The fully developed near-wall turbulent flow fields with and without polymer additives at the same Reynolds number were measured by TRPIV in a water channel. The compar- isons of turbulent statistics confirm that due to viscoelastic structure of long-chain polymers, the wall-normal velocity fluctuation and Reynolds shear stress in the near-wall region are suppressed significantly. Furthermore, it is noted that such a behavior of polymers is closely related to the decease of the motion of the second and forth quadrants, i.e., the ejection and sweep events, in the near-wall region. The spa- tial topological mode of coherent structures during bursts has been extracted by the new mu-level criteria based on locally averaged velocity structure function. Although the general shapes of coherent structures are unchanged by polymer additives, the fluctuating velocity, velocity gradient, velocity strain rate and vorticity of coherent structures during burst events are suppressed in the polymer additive solution com- pared with that in water. The results show that due to the polymer additives the occurrence and intensity of coherent structures are suppressed, leading to drag reduction.

关键词： Time-resolved particle image velocimetry ~ Wall-bounded turbulence ~ Coherent structures ~ Polymer addi-tives ~ Drag reduction

Multiconditional machining process quality prediction using deep transfer learning network

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Advances in Manufacturing 2023年第2期11卷 329-341页

作者： Bo-Hao Li Li-Ping Zhao Yi-yong yao* State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong UniversityXi'an710049People's Republic of China School of Mechanical Engineering Xi'an Jiaotong UniversityXi'an710049People's Republic of China

The quality prediction of machining processes is essential for maintaining process stability and improving component quality. The prediction accuracy of conventional methods relies on a significant amount of process signals under the same operating conditions. However, obtaining sufficient data during the machining process is difficult under most operating conditions, and conventional prediction methods require a certain amount of training data. Herein, a new multiconditional machining quality prediction model based on a deep transfer learning network is proposed. A process quality prediction model is built under multiple operating conditions. A deep convolutional neural network (CNN) is used to investigate the connections between multidimensional process signals and quality under source operating conditions. Three strategies, namely structure transfer, parameter transfer, and weight transfer, are used to transfer the trained CNN network to the target operating conditions. The machining quality prediction model predicts the machining quality of the target operating conditions using limited data. A multiconditional forging process is designed to validate the effectiveness of the proposed method. Compared with other data-driven methods, the proposed deep transfer learning network offers enhanced performance in terms of prediction accuracy under different conditions.

关键词： Multiconditional machining process Intelligent manufacturing Deep transfer learning Quality prediction Process stability