检索结果-南通市图书馆

Enhanced photocatalytic performance of S-scheme CdMoO_(4)/CdO nanosphere photocatalyst

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第12期179卷 198-207页

作者： Zhe Chen Tinglin Ma Zongjun li Wenjing Zhu lingling li School of Material Science and Technology Jilin Institute of Chemical TechnologyJilin 132022China

The photoabsorption capacity,the number of active sites,and the efficiency of carrier separation of photo-catalysts are the main factors that restrict photocatalytic ***,a series of novel CdO-based S-scheme photocatalysts are prepared by a facile one-step precipitation-calcination method for the first *** CdO with a narrow band gap has no photocatalytic hydrogen evolution performance,the CdMoO_(4)/CdO composite exhibits excellent photocatalytic *** photocatalytic hydrogen evolution(PHE)performance of the optimal ratio(3∶4)is up to 7029 μmol g^(-1) h^(-1) under visible light *** the same time,the CdMoO_(4)/CdO composite also shows excellent degradation activity of water pollu-tants,and the degradation efficiency for Tetracycline hydrochloride,Oxytetracycline,Norfloxacin,Reactive red 2,and Levofloxacin is 96.33%,95.38%,88.48%,95.93%,and 77.30%under visible light irradiation for 90min,*** to the experimental characterization and theoretical calculation analysis,the introduction of CdMoO_(4) can be used to construct S-scheme heterojunction with CdO,improving the efficiency of charge separation as well as taking full advantage of redox ability,and hence improving su-perior photocatalysts *** work affords new insights into efficient PHE and antibiotic/dye degradation of CdO-based S-scheme photocatalysts.

关键词： CdMoO_(4) CdO S-scheme heterojunction Hydrogen evolution Antibiotics degradation

Resilient sliding mode control for 2D CPSs under denial-of-service attacks

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Information Sciences) 2024年第6期67卷 262-278页

作者： lingling li Rongni YANG Zhiguang FENG ligang WU College of Intelligent Systems Science and Engineering Harbin Engineering University School of Control Science and Engineering Shandong University School of Astronautics Harbin Institute of Technology

This study addresses the resilient sliding mode control(SMC) problem for two-dimensional cyber-physical systems(2D CPSs) characterized by the Roesser model under denial-of-service attack(DoSA), which can interfere with signal transmission over the communication network. First, the DoS-A model is established by introducing constraints on the Do S frequency and duration. Then, based on active or silent attack situations, the considered system is described as a switched mode. Furthermore, together with Lyapunov theory, the average dwell time technique is employed to deduce sufficient criteria that assure the existence of the desired sliding mode controller. Finally, verification examples are provided to show the validity of the established SMC scheme.

关键词： two-dimensional systems cyber-physical systems denial-of-service attack resilient sliding mode control

Deformation and stability of the seawall,considering the strength uncertainty of cement mixing piles

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第6期25卷 483-501页

作者： Yuansheng YU lingling li Xiangmiao KONG Chengyuan li Zhen GUO Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province College of Civil Engineering and ArchitectureZhejiang UniversityHangzhou310058China Hainan Institute Zhejiang UniversitySanya572000China Ninghai Highway and Transportation Management Center Ningbo315600China Ninghai Traffic Engineering Construction Management Institute Ningbo315600China

The cement mixing (CM) pile is a common method of improving soft offshore ground. The strength growth of CM piles under complex conditions is affected by many factors, especially the cement and moisture contents, and shows significant uncertainty. To investigate the stochasticity of the early strength of CM piles and its impact on the displacement and stability of a seawall, a series of laboratory tests and numerical analyses were carried out in this study. Vane shear tests were conducted on the cement-solidified soil to determine the relationships between the undrained shear strength s_(u) of the cement soil curing in the seawater and the cement content a_(c), as well as the in situ soil moisture content w. It can be inferred that the 24 h undrained shear strength follows a normal distribution. A numerical model considering the random CM pile strength was established to investigate the deformation of the seawall. Due to the uncertainty of CM pile strength, the displacement of the seawall demonstrates a certain discreteness. The decrease of the mean undrained shear strength of CM piles causes a corresponding increase in the average displacement of the seawall. When the mean strength of CM piles is lower than a certain threshold, there is a risk of instability. Furthermore, the heterogeneity of the strength within an individual CM pile also has an impact on seawall displacement. Attention should be paid to the uncertainty of CM pile strength to control displacement and stability.

关键词： Construction uncertainty Cement mixing(CM)pile Strength of cement soil Seawall stability Random finite element method(RFEM) Monte Carlo simulation(MCS)

A novel approach for remanufacturing process planning considering uncertain and fuzzy information

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mechanical Engineering 2021年第3期16卷 546-558页

作者： Yan LV Congbo li Xikun ZHAO Juan li lingling li State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 400044China College of Engineering and Technology Southwest UniversityChongqing 400715China

Remanufacturing,as one of the optimal disposals of end-of-life products,can bring tremendous economic and ecological *** process planning is facing an immense challenge due to uncertainties and fuzziness of recoverable products in damage conditions and remanufacturing quality *** researchers have studied the influence of uncertainties on remanufacturing process planning,very few of them comprehensively studied the interactions among damage conditions and quality requirements that involve uncertain,fuzzy ***,this challenge in the context of uncertain,fuzzy information is undertaken in this paper,and a method for remanufacturing process planning is presented to maximize remanufacturing efficiency and minimize *** particular,the characteristics of uncertainties and fuzziness involved in the remanufacturing processes are explicitly *** optimization model is then developed to minimize remanufacturing time and *** solution is provided through an improved Takagi-Sugeno fuzzy neural network(T-S FNN)*** effectiveness of the proposed approach is exemplified and elucidated by a case *** show that the training speed and accuracy of the improved T-S FNN method are 23.5%and 82.5%higher on average than those of the original method,respectively.

关键词： remanufacturing uncertain and fuzzy information process planning T-S FNN

Novel strategy of constructing fluorescent probe for MAO-B via cascade reaction and its application in imaging MAO-B in human astrocyte

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第1期30卷 71-74页

作者： Huihuan Qin lingling li Kun li Xiaoqi Yu Key Laboratory of Green Chemistry and Technology Ministry of Education College of Chemistry Sichuan University

To detect monoamine oxidase B(MAO-B), the level of which is one of the most important indicators of neurodegenerative diseases such as Parkinson's disease, a new type of cascade reaction based on the formation of coumarin was applied in this research. After the reaction with MAO-B, the protecting group of hydroxyl group in probes(DEAN-MA and DEAB-MA) was removed, and the fluorescence intensity significantly increased(l_(em) 456 nm) as the structure of coumarin was formed subsequently. The probes showed excellent sensitivity and selectivity to MAO-B. The detection limit of DEAN-MA and DEAB-MA were 0.6ng/mL and 0.2 ng/mL, respectively. We succeeded in detecting MAO-B in vitro and imaging it in human astrocyte(U87).

关键词： Monoamine oxidase-B Fluorescent probe Covalent-assembly Coumarin Cell imaging

Design of Passive Constant‑Force End‑Effector for Robotic Polishing of Optical Reflective Mirrors

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Mechanical Engineering 2022年第6期35卷 89-97页

作者： Jian Zhang liangxiao Zhao lingling li Fulei Ma Guimin Chen School of Mechano‑Electrical Engineering Xidian UniversityXi’an 710071China Xi’an Institute of Optics and Precision Mechanics of CAS Xi’an 710119China University of Chinese Academy of Sciences Beijing 100049China Institute of Robotics and Intelligent Systems Xi’an Jiaotong UniversityXi’an 710049China

Polishing plays an indispensable role in optical processing,especially for large-aperture optical reflective mirrors with freeform *** polishing requires effective control of the contact force between the robot and the mirror during *** order to maintain a constant contact force during polishing,traditional polishing robots rely on closed-loop control of air cylinders,whose performances heavily rely on high-fidelity force sensing and real-time *** paper proposes to employ a compliant constant-force mechanism in the end-effector of a polishing robot to passively maintain a constant force between the robot and the mirror,thus eliminating the requirement for force sensing and closed-loop *** compliant constant force mechanism utilizing the second bending mode of fixed-guided compliant beams is adopted and elaborated for the passive *** end-effector providing a constant contact force of 40 N is designed and *** polishing experiment shows that the passive constant-force end-effector provides stable contact force between the robot and the mirror with fluctuation within 3.43 N,and achieves RMS(Root Mean Square)lower thanλ/10(λ=632.8 nm)of the polished surface of the largeaperture optical reflective *** is concluded that the constant-force compliant mechanism provides a low-cost and reliable solution for force control in robotic polishing.

关键词： Robotic polishing Fixed-guided compliant beam Constant-force compliant mechanism Passive force control

Construction of highly active WO_(3)/TpPa-1-COF S-scheme heterojunction toward photocatalytic H_(2)generation

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2022年第28期123卷 41-48页

作者： Long Sun lingling li Jiajie Fan Quanlong Xu Dekun Ma School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China College of Chemistry and Materials Engineering Wenzhou UniversityWenzhou 325027China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process Shaoxing UniversityShaoxing 312000China

The rapid charge recombination and low surface reaction kinetics are the two major constraints to the photocatalytic performance of covalent organic frameworks(COFs).To accelerate the charge separation behavior,TpPa-1-COF is decorated with WO_(3)Bvia an in-situ growth approach,and the resultant WO_(3)/TpPa-1-COF composites show significantly improved photocatalytic ***,when the WO_(3)loading arrives at 3 wt%,3%WO_(3)/TpPa-1-COF exhibits the maximum photocatalytic H_(2)evolution rate of 19.89 mmol g^(-1)h^(-1),which is approximately 4.8 times higher than that of pure *** apparent quantum efficiency(AQE)of 3%WO_(3)/TpPa-1-COF at 420 nm is detected to be 12.4%.X-ray photoelectron spectroscopy(XPS)characterization confirms the formation of internal electric field between WO_(3)and TpPa-1-CF,which can drive the photogenerated charge carrier diffusion in S-scheme *** a result,WO_(3)/TpPa-1-COF composite possesses high charge separation efficiency and strong redox ability,which is further supported by the photoelectrochemical results,thus benefiting the photocatalysis *** work provides a rational strategy to modify COFs in photocatalytic water splitting.

关键词： Covalent organic framework(COF) WO_(3) S-scheme heterojunction Photocatalytic H_(2)evolution

Mailuoning suppresses H_2O_2-induced cortical neuronal injury and correlates with increased catalase activity and inhibited oxidative stress function

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2010年第8期5卷 611-617页

作者： Xiaofan Pan Siyuan Huang lingling li Yun Xu Department of Neurology Drum Tower Hospital of Nanjing University Medical SchoolNanjing 210008Jiangsu ProvinceChina Departrnent of Neurology Xishan People's HospitalWuxi 214011Jiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Nanjing 210008 Jiangsu Province China

BACKGROUND：Mailuoning, a Chinese herb, has been widely used in China to treat acute ischemic stroke, and the major component exhibits anti-oxidative effects. However, the precise anti-oxidation pathway remains ***：To validate the protective effects of Mailuoning on H202-induced primary cortical neuron injury in embryonic ***, TIME AND SETTING：Comparative observation and in v#ro experiments were performed at the Jiangsu Key Laboratory for Molecular Medicine from January 2008 to September ***：Mailuoning （Nanjing Jinling Medical Company, China）, reactive oxygen species （ROS） kit （Beyotime Biotechnology, China）, superoxide dismutase （SOD）, Cu/Zn SOD kit, malondialdehyde （MDA） kits （Nanjing Jiancheng, China）, mitochondrial membrane potential （GMS10013.1, GENMED, USA） and catalase activity assay kit （Beyotime Biotechnology, China） were utilized for the present ***：Mouse embryonic cortical neurons were isolated and cultured with culture medium containing H2O2 （80 μmol/L） and/or Mailuoning （1.25 μg/mL） for 24 *** OUTCOME MEASURES：Neuronal viability and death were detected by methyl thiazolyl tetrazdium and flow cytometry; ROS production was determined by flow cytometry; mitochondriai membrane potential was detected using fluorescent staining; SOD activity was detected using a modified nitroblue tetrazolium method; Cu/Zn SOD and catalase activity was detected by spectrophotometry; and MDA was determined using the lipid peroxidation ***：H2O2 increased ROS production and MDA concentration （P 〈 0.05）, and decreased mitochondrial membrane potential, SOD, Cu/Zn SOD and catalase activity （P 〈 0.05）; the number of surviving neurons （P 〈 0.05） was also reduced. Mai/uoning reversed these ***：Mailuoning protects H2O2-induced injury in cortical cells by inhibiting ROS and MDA, increasing depolarization of mitochondrial membrane, and enhancing SOD and catalase activity.

关键词： Mailuoning , oxidative stress neurons reactive oxygen species catalase activity traditional Chinese medicine mice brain injury neural regeneration

Size and shape control of liFePO4 nanocrystals for better lithium ion battery cathode materials

在线全文

学校读者我要写书评

暂无评论

Nano Research 2013年第7期6卷 469-477页

作者： Caiyun Nan Jun Lu lihong li lingling li Qing Peng Yadong li Department of Chemistry State Key Laboratory of Low-Dimensional Quantum Physics Tsinghua University 8eijing 100084 China

lithium iron phosphate （liFePO4） is a potential high efficiency cathode material for lithium ion batteries, but the low electronic conductivity and single diffusion channel for lithium ions require good particle size and shape control during the synthesis of this material. In this paper, six liFePO4 nanocrystals with different size and shape have been successfully synthesized in ethylene glycol. The addition sequence Fe-PO4-li helps to form liFePO4 nanocrystals with mostly {010} faces exposed, and increasing the amount of liOH leads to a decrease in particle size. The electrochemical performance of the six distinct liFePO4 particles show that the most promising liFePO4 nanocrystals either have predominant {010} face exposure or high specific area, with little iron（II） oxidation.

关键词： liFePO4 nanocrystals size and shape control lithium ion battery rate capability