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基于非对称PVA/墨水/PE双层膜的光驱动柔性致动器和多功能传感器

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science China Materials 2023年第12期66卷 4782-4793页

作者：吴凤林晓莹许雨倩章迪何韵晴刘明贤 Department of Materials science and Engineering College of Chemistry and Materials ScienceJinan UniversityGuangzhou 511443China

聚乙烯醇/中国墨水混合物被均匀涂覆在聚乙烯薄膜上制备了结构稳定的双层软驱动器.由于两层材料的热膨胀系数的显著差异,在氙灯照射下,驱动器能以较快的响应速度实现较大的弯曲变形.通过改变光的强度以及结合尺蠖的仿生结构设计,机器人... 详细信息

聚乙烯醇/中国墨水混合物被均匀涂覆在聚乙烯薄膜上制备了结构稳定的双层软驱动器.由于两层材料的热膨胀系数的显著差异,在氙灯照射下,驱动器能以较快的响应速度实现较大的弯曲变形.通过改变光的强度以及结合尺蠖的仿生结构设计,机器人可以在不同的表面(如纸张和树叶)上实现各种形式的运动.同时在光的驱动下,它可以实现物体的捕获、表情的改变、象鼻的收缩与卷曲以及仿生花朵的开闭等.此外,基于双层驱动器良好的光热转换和灵敏的压力传感性能,它可以实现人体运动监测(如关节弯曲、呼吸、吞咽等),还能与光电转换装置集成.这种多功能、多驱动模式软机器人在可穿戴设备、交通运输、光电转换设备等应用领域具有巨大潜力.

关键词： Chinese ink soft actuator light-driven actuation integration of photoelectric conversion motion monitoring

Genomic organization and transcriptional modulation in response to endocrine disrupting chemicals of three vitellogenin genes in the self-fertilizing fish Kryptolebias marmoratus

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Journal of Environmental sciences 2016年第4期28卷 187-195页

作者： Bo-Mi Kim Min Chul Lee Hye-Min Kang Jae-Sung Rhee Jae-Seong Lee Department of Biological science College of ScienceSungkyunkwan University Department of Marine science College of Natural SciencesIncheon National University

Vitellogenin（Vtg）is the precursor of egg yolk proteins,and its expression has been used as a reliable biomarker for estrogenic contamination in the aquatic environment.To examine the biomarker potential of the self-fertilizing killifish Kryptolebias marmoratus Vtgs（Km-Vtgs）,full genomic DNAs of Km-Vtgs-Aa,Km-Vtgs-Ab,and Km-Vtgs-C were cloned,sequenced,and characterized.Three Vtg genes in K.marmoratus are tandemly placed in a550 kb section of the same chromosome.In silico analysis of promoter regions revealed that both the Km-Vtgs-Aa and Km-Vtgs-Ab genes had an estrogen response element（ERE）,but the Km-Vtgs-C gene did not.However,all three Km-Vtgs genes had several ERE-half sites in their promoter regions.Phylogenetic analysis demonstrated that the three deduced amino acid residues were highly conserved with conventional Vtgs protein,forming distinctive clades within teleost Vtgs.Liver tissue showed the highest expression of Km-Vtg transcripts in all tested tissues（brain/pituitary,eye,gonad,intestine,skin,and muscle）in response to endocrine disrupting chemical（EDC）-exposed conditions.Km-Vtg transcripts were significantly increased in response to 17β-estradiol（E2）,tamoxifen（TMX）,4-n-nonylphenol（NP）,bisphenol A（BPA）,and octylphenol（OP）over 24 hr exposure.The Km-Vtg-A gene was highly expressed compared to the control in response to NP and OP.EDC-induced modulatory patterns of Km-Vtg gene expression were different depending on tissue,gender,and isoforms.

关键词： Kryptolebias marmoratus Vitellogenin Endocrine disrupting chemical

Hydrogen evolution and electromigration in the corrosion of aluminium metal sheath inside high‐voltage cables

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High Voltage 2022年第2期7卷 260-268页

作者： Yidong Chen Kai Zhou Jiamin Kong Shakeel Akram Xiancheng Ren Xiaoshan Zhang Yuan Li Qi Zhao college of Electrical Engineering Sichuan UniversityChengduChina college of Polymer science and Engineering Sichuan UniversityChengduChina college of Materials science and Engineering Sichuan UniversityChengduChina

The urgent need for power transmission is the reason for leading research on the safer operation of high‐voltage cables.These high‐voltage cables are emerging as an efficient technology for underground power transmission.However,the electrochemical corrosion of aluminium(Al)metal sheaths in these cables is a common and challenging degradation process.Herein,the corrosion mechanisms and electrochemical analysis are investigated by using scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR),electrochemical impedance spectroscopy(EIS)and laboratory‐designed electro-chemical characterisation techniques.In the corrosion experiments,the authors evaluated the corrosion rate by measuring the release rate of hydrogen gas and explored the different roles of sodium polyacrylate(NaPA)during the corrosion process.It is found that the complexation reactions between NaPA and Al inhibited corrosion while increased the resistance of the buffer layer.The proposed mechanisms of corrosion in this study can improve the lifespan and sustainability of high‐voltage power transmission.

关键词： corrosion process. electrochemical

The unified transform method to the high-order nonlinear Schr?dinger equation with periodic initial condition

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Communications in Theoretical Physics 2022年第8期74卷 5-14页

作者： Leilei Liu Weiguo Zhang Jian Xu Yuli Guo College of Science University of Shanghai for Science and Technology

In this paper, we study the high-order nonlinear Schr?dinger equation with periodic initial conditions via the unified transform method extended by Fokas and Lenells. For the high-order nonlinear Schr?dinger equation, the initial value problem on the circle can be expressed in terms of the solution of a Riemann–Hilbert problem. The related jump matrix can be explicitly expressed based on the initial data alone. Furthermore, we present the explicit solution, which corresponds to a one-gap solution.

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Direct CP violation of three body decay processes from the resonance effect

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Chinese Physics C 2022年第11期46卷 76-90页

作者：吕刚赵艳琳刘良辰郭新恒 College of Science Henan University of TechnologyZhengzhou 450001China college of Nuclear science and Technology Beijing Normal UniversityBeijing 100875China

The physical state of ρ−ω−φ mesons can be mixed using the unitary matrix.The decay processes ω→π^(+)π^(−)and φ→π^(+)π^(−)originate from isospin symmetry breaking.The ρ−ω,ρ−φ,and ω−φ interferences lead to a resonance contribution to produce strong phases.CP violation is considered from isospin symmetry breaking due to the new strong phase of the first order.CP violation can be enhanced greatly for the decay process B^(0)→π^(+)π^(−)η^((′))when the invariant masses of π^(+)π^(−) pairs are in the area around the ω resonance range and φ resonance range in perturbative QCD.We also discuss the possibility of searching for the predicted CP violation at the LHC.

关键词： CP violation B meson decay heavy flavor physics

Embedded reservoir and constructed wetland for drinking water source protection:Effects on nutrient removal and phytoplankton succession

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Journal of Environmental sciences 2020年第1期32卷 260-271页

作者： Changtao Yang Jing Nan Huaiyong Yu Jianhua Li college of Environmental science and Engineering Tongji University

An embedded reservoir that provides an efficient nutrient removal system protects drinking water.However,embedded reservoirs are rarely used in eutrophic shallow lakes because of their undetermined nutrient retention efficiency and unknown effects by the phytoplankton community.In this study,we aim to investigate the nutrient retention and algae succession in an embedded reservoir and adjacent wetland from April 2017 to September 2018 in the eastern part of Lake Taihu,China.More than 40%of total phosphorus(TP)and 45%of particulate phosphorous entering the reservoir were retained semiannually,and the highest TP removal efficiency was achieved in the reservoir during autumn with an average value of 53.3%±9.9%.The overall nitrogen retention efficiency(21.7%±37.8%)was lower than that of TP(41.8%±27.8%).Similar trends were obtained in the wetland area.An important pathway for phosphorus removal is through particulate matter retention.Our study revealed that nutrient retention mechanisms in the reservoir were primarily via macrophyte absorption,particulate substance sedimentation,and prolonged water residence time.Consequently,the phytoplankton biomass(Chl-a)in the reservoir decreased(from 48.0 to 25.2μg/L)and water transparency improved,due to the decreased P level and transformation of the phytoplankton group into simple structures with good ecological status.Therefore,the combination of embedded reservoir and constructed wetland ecosystem can be used successfully to protect surface water.The results will be advantageous to groups seeking to preserve drinking water sources.

关键词： Drinking water source Eutrophication Embedded reservoir Constructed wetland Nutrient retention Phytoplankton succession

Tumor Classification of Gene Expression Data by Fuzzy Hybrid Twin SVM

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Chinese Journal of Electronics 2022年第1期31卷 99-106页

作者： DUAN Hua FENG Tong LIU Songning ZHANG Yulin SU Jionglong college of Mathematics and Systems science Shandong University of Science and Technology School of AI and Advanced Computing XJTLU Entrepreneur College (Taicang) Xi'an Jiaotong-Liverpool University

A new classification model, the fuzzy hybrid twin support vector machine(TWSVM), namely FHTWSVM, is proposed by combining the fuzzy TWSVM and the hypersphere support vector machine(SVM).The hypersphere SVM is utilized for generating the hyperspheres for the positive and negative class with the smallest possible radius, so that the hyperspheres can contain as many samples as possible. The samples which the hyperspheres cover form a new sample set. Furthermore a distance-based fuzzy function is utilized to calculate the fuzzy factors for the samples. Finally FHTWSVM is used to train all samples with the parameters optimized by grid search. This method can maximize intra-class clustering for noise removal and reduce the influence of outliers.To demonstrate the superiority of the performance of FHTWSVM over other classifiers, e.g., KNN, RF,Bayesian, TWSVM, Ada Boost and XGBoost, a series of experiments is conducted using eight gene expression datasets. The evaluation results show that the proposed approach can improve the classification performance as well as reduce prediction errors for the datasets.

关键词： Binary classification Hybrid twin SVM Fuzzy factor Grid search

The Effect of Key Nodes on theMalware Dynamics in the Industrial Control Network

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Computers, Materials & Continua 2024年第4期79卷 329-349页

作者： Qiang Fu JunWang Changfu Si Jiawei Liu college of Computer science and Technology Shenyang University of Chemical TechnologyShenyang110142China college of Computer science and Engineering Northeastern UniversityShenyang110169China

As industrialization and informatization becomemore deeply intertwined,industrial control networks have entered an era of intelligence.The connection between industrial control networks and the external internet is becoming increasingly close,which leads to frequent security accidents.This paper proposes a model for the industrial control network.It includes a malware containment strategy that integrates intrusion detection,quarantine,and monitoring.Basedonthismodel,the role of keynodes in the spreadofmalware is studied,a comparisonexperiment is conducted to validate the impact of the containment strategy.In addition,the dynamic behavior of the model is analyzed,the basic reproduction number is computed,and the disease-free and endemic equilibrium of the model is also obtained by the basic reproduction number.Moreover,through simulation experiments,the effectiveness of the containment strategy is validated,the influence of the relevant parameters is analyzed,and the containment strategy is optimized.In otherwords,selective immunity to key nodes can effectively suppress the spread ofmalware andmaintain the stability of industrial control systems.The earlier the immunization of key nodes,the better.Once the time exceeds the threshold,immunizing key nodes is almost ineffective.The analysis provides a better way to contain the malware in the industrial control network.

关键词： Key nodes dynamic model industrial control network simulation

Energy,exergy,economic and environmental comprehensive analysis and multi-objective optimization of a sustainable zero liquid discharge integrated process for fixed-bed coal gasification wastewater

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Chinese Journal of Chemical Engineering 2023年第6期58卷 341-354页

作者： Yanli Zhang Zhengkun Hou Dong Yao Xiaomin Qiu Hongru Zhang Peizhe Cui Yinglong Wang Jun Gao Zhaoyou Zhu Limei Zhong college of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China college of Chemical and Environmental Engineering Shandong University of Science and TechnologyQingdao 266590China

For a long time,China's regional water resource imbalance has restricted the development of coal chemical industry,and it is imperative to achieve zero liquid discharge(ZLD).Therefore,the game relationship between technical indicators,costs and emissions in ZLD process of fixed-bed coal gasification wastewater treatment process should be explored in detail.According to the accurate model,the simulation for ZLD of fixed-bed coal gasification wastewater treatment process is established,and this process is assessed from the perspective of thermodynamics,economy,and environment.The total energy consumption of ZLD process before optimization is 4.032×10^(8)W.The results of exergy analysis show exergy destruction of ZLD process is 94.55%.For economic and environmental results,the total annual cost is 1.892×10^(7)USD·a^(-1)and the total environmental impact is 4.782×10^(-8).The total energy consumption of the optimal six-step ZLD process based on multi-objective optimization is 4.028×10^(8)W.The CO_(2)content in the treated wastewater is 0.1%.This study will have an important role in promoting the establishment of the ZLD process for coal chemistry industry.

关键词： Waste water Case study Energy Exergy Economy Environment