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A Chaotic Neural Network Model

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Chinese Physics Letters 1996年第3期13卷 185-188页

作者： shuai Jian-wei CHEN Zhen-xiang liu Rui-tang WU Bo-xi Department of Physics Xiamen UniversityXiamen 361005

A chaotic neural network model is introduced in this *** the variation of a controlling parameter,the model can process the input by a content-addressable means or fall into a chaotic *** the features of brain such as... 详细信息

关键词： state. chaotic letter

Halloysite nanotubes loaded with nano silver for the sustained-release of antibacterial polymer nanocomposite scaffolds

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Journal of Materials Science & Technology 2020年第11期42卷 237-247页

作者： Wang Guo wei liu Li Xu Pei Feng Yanru Zhang Wenjing Yang Cijun shuai aState Key Laboratory of High Performance Complex Manufacturing College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China Department of Metabolism and Endocrinology The Second Xiangya HospitalCentral South UniversityChangsha 410011China School of Basic Medical Science Central South UniversityChangsha 410013China Institute of Bioadditive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013China Shenzhen Institute of Information Technology Shenzhen 518172China

It is challenging for antibacterial polymer scaffolds to achieve the drug sustained-release through directly coating or *** this work,halloysite nanotubes(HNTs),a natural aluminosilicate nanotube,were utilized as a nano container to load nano silver(Ag)into the lumen through vacuum negativepressure suction&injection and thermal decomposition of silver ***,the nano Ag loaded HNTs(HNTs@Ag)were introduced to poly-l-lactic acidide)(PLLA)scaffolds prepared by additive manufacturing for the sustained-release of Ag^+.Acting like a’shield’,the tube walls of HNTs not only retarded the erosion of external aqueous solution on internal nano Ag to generate Ag^+but also postponed the generated Ag^+to diffuse *** results indicated the PLLA-HNTs@Ag nanocomposite scaffolds achieved a sustained-release of Ag^+over 28 days without obvious initial burst ***,the scaffolds exhibited a long-lasting antibacterial property without compromising the ***,the degradation properties,biomineralization ability and mechanical properties of the scaffolds were *** study suggests the potential application of inorganic nanotubes as drug carrier for the sustained-release of functional polymer nanocomposite scaffolds.

关键词： Halloysite nanotubes Nano silver Sustained-release Antibacterial properties Polymer nanocomposite scaffolds

Application of magnesium and biosurfactant functionalized biochar composite in treating cyanobacteria in phosphorus and crude oil contaminated water

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Biochar 2023年第1期5卷 862-876页

作者： Zhuo wei Yaxi Xu Yi wei Yang liu shuai Niu Jim J.Wang Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500YunnanChina School of Plant Environment and Soil SciencesLouisiana State University AgCenterBaton RougeLA 70803USA

Various human activities have led to multiple contamination of natural water *** present study investigated the effect of a novel multifunctional biochar to treat nutrients,oil,and harmful algae in ***,magnesium(Mg)and biosurfactant rhamnolipid(RL)were incorporated into biochar,including Mg-biochar,RL-biochar,and *** adsorption efficiency on phosphate and total petroleum hydrocarbons(TPH)was evaluated in separate batch ***,the inhibition effect of RL-modified biochars on cyanobacteria was *** results showed that Mg-impregnated biochar showed high adsorption capacity on phosphate(118 mg g^(−1)),while RLmodified biochar significantly reduced TPH(especially aromatic and light aliphatic fraction)with adsorption capacity of 44.4 mg g^(−1).The inhibition effects of biochar composites on algae in water without contaminants were in order of Mg-RL-biochar>RL-biochar>biochar with biomass reduction ranging 61-64%.Overall,Mg-RL-biochar was suggested based on this study due to its ability to remove PO_(4)^(3)−and TPH,and inhibit the growth of toxic algae.

关键词： Biochar modification Adsorption TPH Toxic algae Eutrophication

Efect of Al Content on the Corrosion Behavior of Extruded Dilute Mg–Al–Ca–Mn Alloy

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 77-90页

作者： Bao‑Chang liu shuai Zhang Hong‑wei Xiong Wen‑Hao Dai Yin‑Long Ma College of Construction Engineering Jilin UniversityChangchun 130026China Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Natural Resources Changchun 130026China

The microstructure,extrusion texture and corrosion behavior of extruded dilute Mg–Al–Ca–Mn alloy with diferent Al contents were *** corrosion rate of the alloy was more sensitive to the Fe *** 1.2 wt%Al showed the lowest corrosion rate,which was mainly attributed to the weakening of the cathode efect caused by the increase of the Al and the decrease of the Fe in the precipitated *** grains,stronger basal surface texture and higher corrosion potential deriving from the higher Al content of the matrix also further enhanced the corrosion resistance of the matrix.

关键词： Dilute magnesium alloys Corrosion behavior Al content Fe impurity Second phase

Spatiotemporal dynamics of vegetation response to permafrost degradation in Northeast China

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Journal of Arid Land 2024年第11期16卷 1562-1583页

作者： QIU Lisha SHAN wei GUO Ying ZHANG Chengcheng liu shuai YAN Aoxiang Institute of Cold Regions Science and Engineering Northeast Forestry UniversityHarbin 150040China Ministry of Education Observation and Research Station of Permafrost Geo-Environment System in Northeast China Harbin 150040China Collaborative Innovation Centre for Permafrost Environment and Road Construction and Maintenance in Northeast China Harbin 150040China

Permafrost in Northeast China is undergoing extensive and rapid degradation,and it is of great importance to understand the dynamics of vegetation response to permafrost degradation during different periods in this *** on the meteorological station data and MODIS land surface temperature data,we mapped the distribution of permafrost using the surface frost number(SFN)model to analyze the permafrost degradation processes in Northeast China from 1981 to *** investigated the spatiotemporal variation characteristics of vegetation and its response to permafrost degradation during different periods from 1982 to 2020 using the normalized difference vegetation index(NDVI).We further discussed the dominant factors influencing the vegetation dynamics in the permafrost degradation *** indicated that the permafrost area in Northeast China decreased significantly by 1.01×10^(5) km^(2) in the past 40 *** permafrost stability continued to weaken,with large areas of stable permafrost(SP)converted to semi-stable permafrost(SSP)and unstable permafrost(UP)after *** 1982 to 2020,NDVI exhibited a significant decreasing trend in the seasonal frost(SF)region,while it exhibited an increasing trend in the permafrost *** in the UP and SSP regions changed from a significant increasing trend before 2000 to a nonsignificant decreasing trend after *** 78.63%of the permafrost region,there was a negative correlation between the SFN and NDVI from 1982 to *** the SP and SSP regions,the correlation between the SFN and NDVI was predominantly negative,while in the UP region,it was predominantly *** was the dominant factor influencing the NDVI variations in the permafrost region from 1982 to 2020,and the impact of precipitation on NDVI variations increased after *** findings elucidate the complex dynamics of vegetation in the permafrost region of Northeast China and provide deeper insights into the response mechanisms of vegetation

关键词： permafrost degradation surface frost number(SFN) normalized difference vegetation index(NDVI) vegetation response climate change Northeast China

Hybrid Method to Identify Second-trip Echoes Using Phase Modulation and Polarimetric Technology

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Advances in Atmospheric Sciences 2021年第3期38卷 480-492页

作者： shuai ZHANG Jinzhong MIN Chian ZHANG Xingyou HUANG Jun liu Kaihua wei Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science and TechnologyNanjing 210044China Beijing Metstar Radar Co.Ltd. Beijing 100094China Taizhou Meteorological Administration Taizhou 225400China Guangdong Meteorological Observatory Guangzhou 510080China

For pulse Doppler radars,the widely used method for identifying second-trip echoes(STs)in the signal processing level yields significant misidentification in regions of high turbulence and severe wind *** the data processing level,although the novel algorithm for ST identification does not yield significant misidentification in specific regions,its overall identification performance is not ***,this paper proposes a hybrid method for the identification of STs using phase modulation(signal processing)and polarimetric technology(data processing).Through this approach,most of the STs are removed,whereas most of the first-trip echoes(FTs)remain *** with the existing method using a signal quality index filter with an optimized threshold,the hybrid method exhibits superior performance(Heidke skill scores of 0.98 versus 0.88)on independent test datasets,especially in high-turbulence and severe-wind-shear regions,for which misidentification is significantly reduced.

关键词： second-trip echo phase modulation polarimetric radar wind shear

融合注意力与自适应加权特征金字塔的铝型材缺陷检测

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光电子·激光 2025年第1期36卷 53-60页

作者：赵伟刘国华天津工业大学机械工程学院天津市现代机电装备技术重点实验室

本文提出了一种新的铝型材缺陷检测方法，以解决现有方法在精度和小目标缺陷检测方面存在的问题。首先在特征提取网络中引入坐标注意力机制(coordinate attention, CA),以防止信息丢失，从而避免缺陷漏检。其次，引入自适应加权特征金字... 详细信息

本文提出了一种新的铝型材缺陷检测方法，以解决现有方法在精度和小目标缺陷检测方面存在的问题。首先在特征提取网络中引入坐标注意力机制(coordinate attention, CA),以防止信息丢失，从而避免缺陷漏检。其次，引入自适应加权特征金字塔(adaptive weighted feature pyramid, AWFPN),优化特征图的感受野和注意力融合，从而提升缺陷特征的捕获和利用效率。同时，改进了边界框回归损失函数，更好地处理缺陷尺度变化和定位误差，从而在提高检测精度的同时加快了模型的收敛速度。实验结果显示，该方法在提升检测效果方面取得显著进展，尤其在脏点和划痕等缺陷的识别能力上有明显提升。

关键词：铝型材缺陷检测注意力机制深度学习 YOLOv5

Oxidation Resistance of Form-stable High-temperature Phase Change Thermal Energy Storage Materials Doped by Impregnated Graphite

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期 1-12页

作者：李宝让 DAI Jianhuan ZHANG wei liu Xiangchen YANG liu School of Energy Power and Mechanical Engineering North China Electric Power University School of Energy and Environment Southeast University

We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite *** mass ratio of graphite to Al（H2PO4）3changed from 0.5:1 to 4:1,and the impregnation time changed from 1 to *** typical composite phase change thermal storage materials doped with the as-treated graphite were fabricated using form-stable *** investigate the oxidation and anti-oxidation behavior of the impregnated graphite at high temperatures,the samples were put into a muffle furnace for a cyclic heat *** on SEM,EDS,DSC techniques,analyses on the impregnated technique suggested an optimized processing conditions of a 3 h impregnation time with the ratio of graphite:Al（H2PO4）3as 1:3 for graphite impregnation *** investigations on high-temperature phase change heat storage materials doped by the treated graphite suggested excellent oxidation resistance and thermal cycling performance.

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Interface-engineered MoS_(2)/CoS/NF bifunctional catalysts for highly-efficient water electrolysis

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Journal of Energy Chemistry 2022年第12期75卷 16-25,I0002页

作者： Wenxia Chen Xingwang Zhu Rui Wang wei wei Meng liu shuai Dong Kostya Ken Ostrikov Shuang-Quan Zang School of Chemistry and Chemical Engineering Henan Key Laboratory of Biomolecular Recognition and SensingHenan D&A Engineering Center of Advanced Battery MaterialsShangqiu Normal UniversityShangqiu 476000HenanChina Henan Key Laboratory of Crystalline Molecular Functional Materials Henan International Joint Laboratory of Tumor Theranostical Cluster MaterialsGreen Catalysis Center and College of ChemistryZhengzhou UniversityZhengzhou 450001HenanChina College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009JiangsuChina School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQLD 4000Australia

The utilization of non-noble metal catalysts with robust and highly efficient electrocatalytic activity for hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)are extremely important for the large-scale implementation of renewable energy *** of bifunctional electrocatalysts on both anode and cathode electrodes remains a significant ***,we report on a novel and facile strategy to construct the ordered and aligned MoS_(2)nanosheet-encapsulated metal–organic frameworks(MOFs)derived hollow CoS polyhedron,in-situ grown on a nickel foam(NF).The starfish-like MoS_(2)/CoS/NF heterojunctions were formed due to the ordered growth of the material caused by NF *** optimized 2-MoS_(2)/CoS/NF heterojunction exhibits robust bifunctional electrocatalytic activity with a low overpotential of 67 and 207 m V toward the HER and OER at 10 mA cm^(-2),and the long-term stability,which exceeds most of the reported bifunctional *** high electrocatalytic performance arises due to the synergistic effect between the MoS_(2)and CoS phases across the interface,the abundant active sites,as well as the hierarchical pore framework,which collectively enhance the mass and electron transfer during the *** work provides a promising approach to fabricating bifunctional catalysts with custom-designed heterojunctions and remarkable performance for applications in electrochemical energy devices and related areas.

关键词： Heterojunction Bifunctional catalysts HER OER