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Preparation of Ag@AgCl-doped TiO_2/sepiolite and its photocatalytic mechanism under visible light

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Journal of Environmental Sciences 2017年第10期29卷 43-52页

作者： Shaomin Liu Dinglong Zhu Jinglin Zhu qing yang Huijun Wu School of Earth Science and Environmental Engineering Anhui University of Science and Technology

A cube-like Ag@Ag Cl-doped TiO2/sepiolite（denoted Ag@Ag Cl–TiO2/sepiolite） was successfully synthesized via a novel method. X-ray diffraction, scanning electron microscopy, energy dispersion X-ray fluorescence, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and diffuse reflectance ultraviolet–visible spectroscopy were performed to determine the structure and physicochemical properties of Ag@Ag Cl–TiO2/sepiolite. SEM micrographs revealed that Ag@Ag Cl nanoparticles and TiO2 film are well deposited on the surface of tube-like sepiolite. As a result, Ag@Ag Cl–TiO2/sepiolite exhibits a red shift relative to TiO2/sepiolite. Photocatalytic experiments demonstrated that the dosage of catalysts plays an important role during photocatalysis. The photoelectrochemical activities of Ag@Ag Cl–TiO2/sepiolite and TiO2/sepiolite were also investigated. Photocurrent responses confirmed that the ability of Ag@Ag Cl–TiO2/sepiolite to separate photo-generated electron–hole pairs is stronger than that of TiO2/sepiolite. Methylene Blue degradation is also improved under alkaline conditions and visible light irradiation because more UOH is produced by visible light *** excellent catalytic ability is mainly attributed to the formed Ag nanoparticles and the Schottky barrier at the Ag/TiO2 interface. Active species analysis indicated that UO2-and h＋are implicated as active species in photocatalysis. Therefore, catalysts are excited to produce abundant electron–hole pairs after they absorb photons in photocatalysis.

关键词： Ag@AgCl Sepiolite Photocatalyst Photocurrent

Locally differentially private high-dimensional data synthesis

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Science China(Information Sciences) 2023年第1期66卷 25-42页

作者： Xue CHEN Cheng WANG qing yang Teng HU Changjun JIANG Key Laboratory of Embedded System and Service Computing (Tongji University) Ministry of Education National (Province-Ministry Joint) Collaborative Innovation Center for Financial Network Security Tongji University

In local differential privacy(LDP), a challenging problem is the ability to generate highdimensional data while efficiently capturing the correlation between attributes in a dataset. Existing solutions for low-dimensional data synthesis, which partition the privacy budget among all attributes, cease to be effective in high-dimensional scenarios due to the large-scale noise and communication cost caused by the high dimension. In fact, the high-dimensional characteristics not only bring challenges but also make it possible to apply some technologies to break this bottleneck. This paper presents Sam Priv Syn for high-dimensional data synthesis under LDP, which is composed of a marginal sampling module and a data generation *** marginal sampling module is used to sample from the original data to obtain two-way marginals. The sampling process is based on mutual information, which is updated iteratively to retain, as much as possible,the correlation between attributes. The data generation module is used to reconstruct the synthetic dataset from the sampled two-way marginals. Furthermore, this study conducted comparison experiments on the real-world datasets to demonstrate the effectiveness and efficiency of the proposed method, with results proving that Sam PrivSyn can not only protect privacy but also retain the correlation information between the attributes.

关键词： local differential privacy high-dimensional data synthesis sampling data privacy privacy-preserving protocols

Identification of peanut oil origins based on Raman spectroscopy combined with multivariate data analysis methods

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Journal of Integrative Agriculture 2022年第9期21卷 2777-2785页

作者： ZHU Peng-fei yang qing-li ZHAO Hai-yan College of Food Science and Engineering Qingdao Agricultural UniversityQingdao 26619P.R.China

This study aimed to use Raman spectroscopy to identify the producing areas of peanut oil and build a robust discriminant model to further screen out the characteristic spectra closely related to the origin. Raman spectra of 159 peanut oil samples from different provinces and different cities of the same province were collected. The obtained data were analyzed by stepwise linear discriminant analysis(SLDA), k-nearest neighbor analysis(k-NN),support vector machine(SVM) and multi-way analysis of variance. The results showed that the overall recognition rate of samples based on full spectra was higher than 90%. The producing origin, variety and their interaction influenced Raman spectra of peanut oil significantly, and 1 400–1 500 cmand 1 600– 1 700 cmwere selected as the characteristic spectra of origin and less affected by variety. The best classification model established by SLDA combined with characteristic spectra could rapidly and accurately identify peanut oil’s origin.

关键词： Raman spectroscopy peanut oil large-scale district small-scale district variety chemometrics

Monitoring Damage Evolution in a Titanium Matrix Composite Shaft Under Torsion Loading Using Acoustic Emission

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Acta Metallurgica Sinica(English Letters) 2019年第10期32卷 1244-1252页

作者： Xu Kong Yu-Min Wang Xu Zhang qing yang Guo-Xing Zhang Li-Na yang Rui yang Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China University of Chinese Academy of Sciences Beying 100049 China

The damage behaviors of a titanium matrix composite shaft under torsion loading were monitored using the acoustic emission technique. The composite shaft with SiC fibers at ±45° orientations was prepared by the solid-state fabrication process. Both the torsional rigidity and torsional strength of the TMC shaft were improved by SiC fibers. The acoustic emission responses during the loading-unloading-reloading, under quasi-static and cyclic torsion tests were investigated. Multiple acoustic emission signals were grouped as mechanical noise, matrix deformation, interface debonding and fiber fracture using amplitude, waveform shape and frequency centroid parameters. A substantial reduction of signals generated by matrix deformation was found in the reloading test. During the quasi-static torsion test, interface debonding and progressive breaks of SiC fibers occurred. According to different acoustic emission behaviors, the failure process in the torsion fatigue test can be divided into three stages: the initial stage, the fiber fracture stage and the fast fracture stage.

关键词： Metal matrix composites (MMCs) Fracture Fatigue Acoustic emission Torsion

Network pharmacological and molecular docking study of the effect of Liu-Wei-Bu-Qi capsule on lung cancer

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World Journal of Clinical Cases 2023年第31期11卷 7593-7609页

作者： qing yang Li-Yuan Li The Second Department of Oncology The First Affiliated Hospital of Anhui University of Chinese MedicineHefei 230031Anhui ProvinceChina

BACKGROUND Although Liu-Wei-Bu-Qi capsule(LBC)inhibits tumor progression by improving the physical condition and immunity of patients with lung cancer(LC),its exact mechanism of action is *** To through compound multi-dimensional network of chemical ingredient-targetdisease-target-protein-protein interaction(PPI)network,the principle of action of Chinese medicine prescription was explained from molecular *** Network pharmacology and molecular docking simulations were used to analyze the relationship among the main components,targets,and signaling pathways of LBC in treatment of *** From the analysis,360 LBC active ingredient-related targets and 908 LC-related targets were *** network analysis of the LBC and LC overlapping targets identified 16 hub *** Encyclopedia of Genes and Genomes analysis suggested that LBC can target the vascular endothelial growth factor signaling pathway,Toll-like receptor signaling pathway,prolactin signaling pathway,FoxO signaling pathway,PI3K-Akt signaling pathway and HIF-1 signaling pathway in the treatment of *** docking simulations showed that quercetin had the best affinity for MAPK3,suggesting that quercetin in LBC may play an important role in the treatment of *** The results showed that the active ingredients in LBC can play a crucial role in the treatment of LC by regulating multiple signaling *** results provide insights into further studies on the mechanism of action of LBC in the treatment of LC.

关键词： Liu-Wei-Bu-Qi capsule Lung cancer Network pharmacology Molecular docking Active ingredients Signaling pathways

Predicting lateral displacement caused by seismic liquefaction and performing parametric sensitivity analysis:Considering cumulative absolute velocity and fine content

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Frontiers of Structural and Civil Engineering 2021年第2期15卷 506-519页

作者： Nima PIRHADI Xiaowei TANG qing yang Afshin ASADI Hazem Samih MOHAMED School of Civil Engineering and Geomatics Southwest Petroleum UniversityChengdu 610500China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Civil Engineering Discipline Department of EngineeringInternational College of AucklandAuckland 1010New Zealand

Lateral displacement due to liquefaction(D_(H))is the most destructive effect of earthquakes in saturated loose or semi-loose sandy *** all earthquake parameters,the standardized cumulative absolute velocity(CAV_(5))exhibits the largest correlation with increasing pore water pressure and ***,the complex effect of fine content(FC)at different values has been studied and ***,these two contexts have not been entered into empirical and semi-empirical models to predict D_(H)This study bridges this gap by adding CAV_(5)to the data set and developing two artificial neural network(ANN)*** first model is based on the entire range of the parameters,whereas the second model is based on the samples with FC values that are less than the 28%critical *** results demonstrate the higher accuracy of the second model that is developed even with less ***,according to the uncertainties in the geotechnical and earthquake parameters,sensitivity analysis was performed via Monte Carlo simulation(MCS)using the second developed ANN model that exhibited higher *** results demonstrated the significant influence of the uncertainties of earthquake parameters on predicting D_(H).

关键词： lateral spreading displacement cumulative absolute velocity fine content artificial neural network sensitivity analysis Monte Carlo simulation

Far-field super-resolution chemical microscopy

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Light(Science & Applications) 2023年第7期12卷 1246-1267页

作者： Mingwei Tang Yubing Han Danchen Jia qing yang Ji-Xin Cheng State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Intelligent Perception Research Institute Zhejiang LabHangzhou 311100China Department of Biomedical Engineering Department of Electrical and Computer EngineeringPhotonics CenterBoston UniversityBostonMA 02459USA

Far-feld chemical microscopy providing molecular electronic or vibrational fingerprint information opens a new window for the study of three-dimensional biological,material,and chemical *** microscopy provides a nondestructive way of chemical identification without exterior ***,the diffraction limit of optics hindered it from discovering more details under the resolution *** development of super-resolution techniques gives enlightenment to open this door behind far-field chemical ***,we review recent advances that have pushed the boundary of far-field chemical microscopy in terms of spatial *** further highlight applications in biomedical research,material characterization,environmental study,cultural heritage conservation,and integrated chip inspection.

关键词： chemical details optics

Visual SLAM Based on Object Detection Network:A Review

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Computers, Materials & Continua 2023年第12期77卷 3209-3236页

作者： Jiansheng Peng Dunhua Chen qing yang Chengjun yang Yong Xu Yong Qin College of Automation Guangxi University of Science and TechnologyLiuzhou545000China Department of Artificial Intelligence and Manufacturing Hechi UniversityHechi547000China

Visual simultaneous localization and mapping(SLAM)is crucial in robotics and autonomous ***,traditional visual SLAM faces challenges in dynamic *** address this issue,researchers have proposed semantic SLAM,which combines object detection,semantic segmentation,instance segmentation,and visual *** the growing body of literature on semantic SLAM,there is currently a lack of comprehensive research on the integration of object detection and visual ***,this study aims to gather information from multiple databases and review relevant literature using specific *** focuses on visual SLAM based on object detection,covering different ***,it discusses the current research status and challenges in this field,highlighting methods for incorporating semantic information from object detection networks into mileage measurement,closed-loop detection,and map *** also compares the characteristics and performance of various visual SLAM object detection ***,it provides an outlook on future research directions and emerging trends in visual *** has shown that visual SLAM based on object detection has significant improvements compared to traditional SLAM in dynamic point removal,data association,point cloud segmentation,and other *** can improve the robustness and accuracy of the entire SLAM system and can run in real *** the continuous optimization of algorithms and the improvement of hardware level,object visual SLAM has great potential for development.

关键词： Object detection visual SLAM visual odometry loop closure detection semantic map

Strain rate analyses during elliptical vibration cutting of Inconel 718 using finite element analysis,Taguchi method,and ANOVA

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Advances in Manufacturing 2020年第3期8卷 316-330页

作者： Hai-Bo Xie Zi-qing yang Na Qin Zhan-Jiang Wang Tribology Research Institute Department of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu610031People’s Republic of China

The high strain rate in metal cutting significantly affects the mechanical properties of the work piece by altering its *** study outlines the material strain rates during elliptical vibration *** finite element analysis,Taguchi method,and analysis of variance(ANOVA)were employed to analyze the effects and contributions of cutting and vibration process parameters(feed rate,rake angle,tangential amplitude,and frequency of vibration)on the variation of strain rates during machining of Inconel *** signal-to-noise analysis on an L18(2^1×3^3)orthogonal array was used to determine the optimum parametric combination for the maximum strain rate,and ANOVA was applied to evaluate the significance of control parameter factors on the strain *** results of the finite element analysis under different conditions illustrated that the feed rate and rake angle were negatively related to the strain rate,whereas the tangential amplitude and frequency had a positive ***,ANOVA results indicated that the effect of the feed rate,tool rake angle,vibration frequency,and tangential amplitude on the strain rate were all statistically significant,with a reliability level of 95%.Of these,the dominant parameter affecting the strain rate was the feed rate,with a percentage contribution of 40.36%.The estimation of the optimum strain rate and confirmation tests proved that the Taguchi method could successfully optimize the working conditions to obtain the desired maximum strain rate.

关键词： Elliptical vibration cutting Strain rate Finite element(FE) Taguchi method Analysis of variance(ANOVA)