检索结果-南通市图书馆

Piezoelectrically Mediated Reactions:From Catalytic Reactions to Organic Transformations

Chinese Journal of Chemistry 2023年第1期41卷 111-128页

作者： Ziye Ren Yuhao Peng Hanliang He Chengqiang Ding Jialin Wang Zhao Wang Zhengbiao Zhang State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China Suzhou Medical College Soochow UniversitySuzhouJiangsu 215123China The Department of Orthopedic Surgery Dushu Lake Hospital Affiliated to Soochow UniversitySuzhouJiangsu 215123China State Key Laboratory of Radiation Medicine and Protection Soochow UniversitySuzhouJiangsu 215123China

Recently,piezocatalysis has attracted considerable attention as a new type of renewable mechanical energy conversion technology,which relies on the strain induced polarization of the piezoelectric *** new technology has been extensively applied in the applications of water splitting,water remediation,gas purification and tumor *** the rapid development in the piezo-catalysis,the utilization of piezoelectric materials for synthetic purpose is still under *** means to promote or-ganic reactions expand the scope of piezoelectrically mediated reactions and show successes in both organic and polymer ***,we provide a comprehensive review on recent progress of piezoelectrically mediated reactions,catalytic mechanisms and applications in the last few *** limitations and future directions of this area are also *** believe this review will provide new insights into the underlying mechanism of piezoelectric mediated electron transfer process and guide the design of new chemistry.

关键词： Piezocatalysis Heterogeneous catalysis Mechanical energy Polymerization Organic synthesis Water spilling Tumor therapy Mechanoredox Piezoelectric material

来源：

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

Energy Consumption Prediction of a CNC Machining Process With Incomplete Data

引用

IEEE/CAA Journal of Automatica Sinica 2021年第5期8卷 987-1000页

作者： Jian Pan Congbo Li Ying Tang Wei Li Xiaoou Li the State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing 400044China the Department of Electrical and Computer Engineering Rowan UniversityGlassboroNJ 08028 USA the Computer Science Department The Research and Advanced Studies Centre of the National Polytechnic InstituteMexico City 07360Mexico

Energy consumption prediction of a CNC machining process is important for energy efficiency optimization *** improve the generalization abilities,more and more parameters are acquired for energy prediction *** the data collected from workshops may be incomplete because of misoperation,unstable network connections,and frequent transfers,*** work proposes a framework for energy modeling based on incomplete data to address this ***,some necessary preliminary operations are used for incomplete data ***,missing values are estimated to generate a new complete data set based on generative adversarial imputation nets(GAIN).Next,the gene expression programming(GEP)algorithm is utilized to train the energy model based on the generated data ***,we test the predictive accuracy of the obtained *** experiments are designed to investigate the performance of the proposed framework with different rates of missing *** results demonstrate that even when the missing data rate increases to 30%,the proposed framework can still make efficient predictions,with the corresponding RMSE and MAE 0.903 k J and 0.739 k J,respectively.

关键词： Energy consumption prediction incomplete data generative adversarial imputation nets(GAIN) gene expression programming(GEP)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Graphene-based dual-function acoustic transducers for machine learning-assisted human-robot interfaces

引用

InfoMat 2023年第2期5卷 66-79页

作者： Hao Sun Xin Gao Liang-Yan Guo Lu-Qi Tao Zi Hao Guo Yangshi Shao Tianrui Cui Yi Yang Xiong Pu Tian-Ling Ren Institute of Microelectronics and Beijing National Research Center for Information Science and technology(BNRist) Tsinghua UniversityBeijingPeople's Republic of China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijingPeople's Republic of China State Key Laboratory of Power Transmission Equipment and System Security and New technology School of Electrical EngineeringChongqing UniversityChongqingPeople's Republic of China School of Computer Science&technology Beijing Institute of TechnologyBeijingPeople's Republic of China School of Automation and Electrical Engineering University of Science and Technology BeijingBeijingPeople's Republic of China

Human–robot interface(HRI)electronics are critical for realizing robotic ***,we report graphene-based dual-function acoustic transducers for machine learning-assisted human–robot interfaces(GHRI).The GHRI functions both an artificial ear through the triboelectric acoustic sensing mechanism and an artificial mouth through the thermoacoustic sound emission *** success of the integrated device is also attributed to the multifunctional laser-induced graphene,as either triboelectric materials,electrodes,or thermoacoustic *** systematically optimizing the structure parameters,the GHRI achieves high sensitivity(4500 mV Pa^(–1))and operating durability(1000000 cycles and 60 days),capable of recognizing speech identities,emotions,content,and other information in the human *** the assistance of machine learning,30 speech categories are trained by a convolutional neural network,and the accuracy reaches 99.66%and 96.63%in training datasets and test ***,GHRI is used for artificial intelligence communication based on recognized speech *** work shows broad prospects for the development of robotic intelligence.

关键词： human-robot interface laser-induced graphene machine learning thermoacoustic triboelectric nanogenerator

来源：

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

Study on contact fatigue of a wind turbine gear pair considering surface roughness

引用

Friction 2020年第3期8卷 553-567页

作者： Heli LIU Huaiju LIU Caichao ZHU Zhangdong SUN Houyi BAI State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400030China Hubei University of Automotive technology Shiyan 442002HubeiChina chongqing Wangjiang Industrial Co.chongqing 400071China

Contact fatigue issues become more and more crucial in gear industry as they significantly affect the reliability and service life of associated mechanical systems such as wind turbine *** contact fatigue behavior is mostly determined by the mechanical properties of materials and stress fields near the contact area,which is further influenced by the lubrication and surface roughness due to pressure *** this study,a numerical model incorporating the lubrication state,tooth surface roughness,residual stress,and mechanical properties of the material is developed to determine the contact fatigue behavior of a megawatt level wind turbine carburized *** variations of the hardness and residual stress along the depth were characterized by the Vickers hardness measurement and X-ray diffraction test,*** elastohydrodynamic lubrication theory was applied to predict the contact pressure distribution,highlighting the influence of the surface roughness that stemed from the original measurement through an optical *** stress histories of the studied material points during a complete contact loading cycle were fast calculated using the discreteconcrete fast Fourier transformation(DC-FFT)*** Dang Van diagrams under different working conditions were determined to estimate the contact fatigue failure *** effect of the root mean square(RMS)value of the surface roughness on the failure risk at critical material points were discussed in *** revealed that the surface roughness significantly increases the contact fatigue failure risk within a shallow area,and the maximum risk appears near the surface.

关键词： carburized gear contact fatigue surface roughness residual stress Dang Van criterion

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Randomized Latent Factor Model for High-dimensional and Sparse Matrices from Industrial applications

引用

IEEE/CAA Journal of Automatica Sinica 2019年第1期6卷 131-141页

作者： Mingsheng Shang Xin Luo Zhigang Liu Jia Chen Ye Yuan MengChu Zhou the chongqing Engineering Research Center of Big Data application for Smart Cities and Chongqing Key Laboratory of Big Data and Intelligent ComputingChongqing Institute of Green and Intelligent TechnologyChinese Academy of Sciences the School of Computer Science and Engineering Beihang University the Department of Electrical and Computer Engineering New Jersey Institute of Technology

Latent factor(LF) models are highly effective in extracting useful knowledge from High-Dimensional and Sparse(HiDS) matrices which are commonly seen in various industrial applications. An LF model usually adopts iterative optimizers,which may consume many iterations to achieve a local optima,resulting in considerable time cost. Hence, determining how to accelerate the training process for LF models has become a significant issue. To address this, this work proposes a randomized latent factor(RLF) model. It incorporates the principle of randomized learning techniques from neural networks into the LF analysis of HiDS matrices, thereby greatly alleviating computational burden. It also extends a standard learning process for randomized neural networks in context of LF analysis to make the resulting model represent an HiDS matrix *** results on three HiDS matrices from industrial applications demonstrate that compared with state-of-the-art LF models, RLF is able to achieve significantly higher computational efficiency and comparable prediction accuracy for missing data.I provides an important alternative approach to LF analysis of HiDS matrices, which is especially desired for industrial applications demanding highly efficient models.

关键词： Big data high-dimensional and sparse matrix latent factor analysis latent factor model randomized learning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Integrated Optimization of Structure and Control Parameters for the Height Control System of a Vertical Spindle Cotton Picker

引用

Chinese Journal of Mechanical Engineering 2021年第6期34卷 405-416页

作者： Xingzheng Chen Congbo Li Rui Hu Ning Liu Chi Zhang College of Engineering and technology Southwest UniversityChongqing400715China State Key Laboratory of Mechanical Transmission Chongqing UniversityChongqing400044China Department of Mechanical Engineering National University of SingaporeSingapore119077Singapore

Vertical picking method is a predominate method used to harvest cotton ***,a vertical picking method may cause spindle bending of the cotton picker if spindles collide with stones on the cotton ***,how to realize a precise height control of the cotton picker is a crucial issue to be *** objective of this study is to design a height control system to avoid the *** design it,the mathematical models are established *** a multi-objective optimization model represented by structure parameters and control parameters is proposed to take the pressure of chamber without piston,response time and displacement error of the height control system as the opti-mization *** integrated optimization approach that combines optimization via simulation,particle swarm optimization and simulated annealing is proposed to solve the *** and experimental test results show that the proposed integrated optimization approach can not only reduce the pressure of chamber without piston,but also decrease the response time and displacement error of the height control system.

关键词： Cotton picker Height control system Structure parameters Control parameters Integrated optimization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Extractive distillation: Advances in conceptual design, solvent selection,and separation strategies

引用

Chinese Journal of Chemical Engineering 2019年第6期27卷 1247-1256页

作者： Shirui Sun Liping Lü Ao Yang Shun'an Wei Weifeng Shen School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 400044China School of Chemistry and Chemical Engineering Yangtze Normal UniversityChongqingFuling 408100China Collaborative innovation Center for Green Development in Wuling Moutain Area Yangtze Normal UniversityChina

Extractive distillation(ED) is one of the most promising approaches for the separation of the azeotropic or closeboiling mixtures in the chemical industry. The purpose of this paper is to provide a broad overview of the recent development of key aspects in the ED process involving conceptual design, solvent selection, and separation strategies. To obtain the minimum entrainer feed flow rate and reflux ratio for the ED process, the conceptual design of azeotropic mixture separation based on a topological analysis via thermodynamic feasibility insights involving residue curve maps, univolatility lines, and unidistribution curves is presented. The method is applicable to arbitrary multicomponent mixtures and allows direct screening of design alternatives. The determination of a suitable solvent is one of the key steps to ensure an effective and economical ED process. Candidate entrainers can be obtained from heuristics or literature studies while computer aided molecular design(CAMD) has superiority in efficiency and reliability. To achieve optimized extractive distillation systems, a brief review of evaluation method for both entrainer design and selection through CAMD is presented. Extractive distillation can be operated either in continuous extractive distillation(CED) or batch extractive distillation(BED), and both modes have been well-studied depending on the advantages in flexibility and low capital costs. To improve the energy efficiency, several configurations and technological alternatives can be used for both CED and BED depending on strategies and main azeotropic feeds. The challenge and chance of the further ED development involving screening the best potential solvents and exploring the energy-intensive separation strategies are discussed aiming at promoting the industrial application of this environmentally friendly separation technique.

关键词： Extractive distillation Separation strategies Solvent selection Conceptual design

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Multifractal characteristics and spatial variability of soil particle-size distribution in different land use patterns in a small catchment of the Three Gorges Reservoir Region,china

引用

Journal of Mountain Science 2021年第1期18卷 111-125页

作者： CHEN Tai-li SHI Zhong-lin WEN An-bang YAN Dong-chun GUO Jin CHEN Jia-cun LIU Yuan CHEN Rui-yin Key Laboratory of Mountain Surface Processes and Ecological Regulation Institute of Mountain Hazards and EnvironmentChinese Academy of SciencesChengdu 610041China University of Chinese Academy of Sciences Beijing 100049China Department of Resources and Environmental Engineering Sichuan Water Conservancy Vocational CollegeChengdu 611231China

Characterizing soil particle-size distribution is a key measure towards soil *** purpose of this study was to evaluate the multifractal characteristics of soil particle-size distribution among different land-use from a purple soil catchment and to generalize the spatial variation trend of multifractal parameters across the catchment.A total of 84 soil samples were collected from four kinds of land use patterns(dry land,orchard,paddy,and forest)in an agricultural catchment in the Three Gorges Reservoir Region,*** multifractal analysis method was applied to quantitatively characterize the soil particle size *** soil particle size distribution(PSD)multifractal parameters(D(0),D(1),D(2),(35)a(q),(35)f[a(q)],α(0))were ***,a geostatistical analysis was employed to reveal the spatial differentiation and map the spatial distribution of these *** multifractal characteristics were *** trend of generalized dimension spectrum of four land use patterns was basically consistent with the range of 0.8 to ***,orchard showed the largest monotonic decline,while the forest demonstrated the smallest decrease.D(0)of the four land use patterns were ranked as:dry land

关键词： Land use patterns Purple soil Multifractal characteristics Particle size distribution Geostatistics Spatial variability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Detection of loop closure in visual SLAM:a stacked assorted auto-encoder based approach

引用

Optoelectronics Letters 2021年第6期17卷 354-360页

作者：罗元肖雨婷张毅曾念文 Key Laboratory of Optoelectronic Information Sensing and technology School of Optical EngineeringChongqing University of Posts and TelecommunicationsChongqing 400065China Engineering Research Center for Information Accessibility and Service Robots School of Advanced Manufacturing EngineeringChongqing University of Posts and TelecommunicationsChongqing 400065China

The current mainstream methods of loop closure detection in visual simultaneous localization and mapping(SLAM)are based on bag-of-words(Bo W).However,traditional Bo W-based approaches are strongly affected by changes in the appearance of the scene,which leads to poor robustness and low *** order to improve the precision and robustness of loop closure detection,a novel approach based on stacked assorted auto-encoder(SAAE)is *** traditional stacked auto-encoder is made up of multiple layers of the same *** with the visual Bo W model,although it can better extract the features of the scene image,the output feature dimension is *** proposed SAAE is composed of multiple layers of denoising auto-encoder,convolutional auto-encoder and sparse auto-encoder,it uses denoising auto-encoder to improve the robustness of image features,convolutional auto-encoder to preserve the spatial information of the image,and sparse auto-encoder to reduce the dimensionality of image *** is capable of extracting low to high dimensional features of the scene image and preserving the spatial local characteristics of the image,which makes the output features more *** performance of SAAE is evaluated by a comparison study using data from new college dataset and city centre *** methodology proposed in this paper can effectively improve the precision and robustness of loop closure detection in visual SLAM.

关键词： visual closure SLAM

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Reachable set estimation for discrete-time Markovian jump neural networks with unified uncertain transition probability

引用

Journal of Automation and Intelligence 2023年第3期2卷 167-174页

作者： Yufeng Tian Wengang Ao Peng Shi College of Automation Chongqing UniversityChina National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business UniversityChina School of Electrical and Electronic Engineering The University of AdelaideAdelaideS.A.Australia School of Electronic Electrical Engineering and PhysicsFujian University of TechnologyChina

This paper focuses on the reachable set estimation for Markovian jump neural networks with time *** allowing uncertainty in the transition probabilities,a framework unifies and enhances the generality and realism of these *** fully exploit the unified uncertain transition probabilities,an equivalent transformation technique is introduced as an alternative to traditional estimation methods,effectively utilizing the information of transition ***,a vector Wirtinger-based summation inequality is proposed,which captures more system information compared to existing *** upon these components,a novel condition that guarantees a reachable set estimation is presented for Markovian jump neural networks with unified uncertain transition probabilities.A numerical example is illustrated to demonstrate the superiority of the approaches.

关键词： Markovian jump neural networks Unified uncertain transition probabilities Reachable set estimation Double-boundary approach Vector wirtinger-based summation inequality

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：