检索结果-内蒙古大学图书馆

Synergically regulated silver species and surface oxygen on manganese oxide for promoted activity of formaldehyde oxidation

引用

Journal of Environmental sciences 2024年第4期138卷 709-718页

作者： Shuo Hu Jianghao Zhang Xueyan Chen Xiaoxiao Qin Jinshui Yao Changbin Zhang School of Materials Science&Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan 250353China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Formaldehyde(HCHO)is a common indoor pollutant that is detrimental to human *** efficient removal has become an urgent demand to reduce the public health *** this work,Ag-MnO_(x)-based catalysts were prepared and activated under different atmosphere(i.e.,air,hydrogen(H_(2))and carbon monoxide(CO))for efficient oxidation of *** catalyst activated with CO(Ag/Mn-CO)displayed the highest activity among the tested samples with 90% conversion at 100℃ under a gas space velocity of 75,000 mL/(g_(cat)·hr).Complementary characterizations demonstrate that CO reduction treatment resulted in synergically regulated content of surface oxygen on support to adsorb/activate HCHO and size of Ag particle to dissociate oxygen to oxidize the adsorbed *** contrast,other catalysts lack for either abundant surface oxygen species or metallic silver with the appropriate particle size,so that the integrate activity is limited by one specific reaction *** study contributes to elucidating the mechanisms regulating the oxidation activity of Ag-based catalysts.

关键词： HCHO oxidation Ag-MnO_(x)-based catalyst Activation condition Synergic regulation Surface oxygen Oxidized Ag

来源：评论

学校读者我要写书评

暂无评论

Force Compensation control for Electro-Hydraulic Servo System with Pump-Valve Compound Drive via QFT-DTOC

引用

Chinese Journal of Mechanical engineering 2024年第2期37卷 228-246页

作者： Kaixian Ba Yuan Wang Xiaolong He Chunyu Wang Bin Yu Yaliang Liu Xiangdong Kong Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Qinhuangdao 066004China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004China National Engineering Research Center for Local Joint of Advanced Manufacturing Technology and Equipment Yanshan UniversityQinhuangdao 066004China

Each joint of a hydraulic-driven legged robot adopts a highly integrated hydraulic drive unit(HDU),which features a high power-weight ***,most HDUs are throttling-valve-controlled cylinder systems,which exhibit high energy *** contrast,pump control systems offer a high ***,their response ability is *** fully utilize the advantages of pump and valve control systems,in this study,a new type of pump-valve compound drive system(PCDS)is designed,which can not only effectively reduce the energy loss,but can also ensure the response speed and response accuracy of the HDUs in robot joints to satisfy the performance requirements of ***,considering the force control requirements of energy conservation,high precision,and fast response of the robot joint HDU,a nonlinear mathematical model of the PCDS force control system is first *** addition,pressure-flow nonlinearity,friction nonlinearity,load complexity and variability,and other factors affecting the system are considered,and a novel force control method based on quantitative feedback theory(QFT)and a disturbance torque observer(DTO)is designed,which is denoted as QFT-DTOC *** method improves the control accuracy and robustness of the force control system,reduces the effect of the disturbance torque on the control performance of the servo motor,and improves the overall force control performance of the ***,experimental verification is performed using the PCDS performance test *** experimental results and quantitative data show that the QFT-DTOC proposed herein can significantly improve the force control performance of the *** relevant force control method can be used as a bottom-control method for the hydraulic servo system to provide a foundation for implementing the top-level trajectory planning of the robot.

关键词： Legged robot Pump-valve compound drive system(PCDS) Force compensation control Quantitative feedback theory(QFT) Disturbance torque observer(DTO)

来源：评论

学校读者我要写书评

暂无评论

A synchronous spatiotemporal graph neural network for short-term traffic flow prediction

引用

Soft Computing 2025年第6期29卷 2983-2997页

作者： Zhang, Zhao Jiao, Xiaohong Engineering Research Center of the Ministry of Education for Intelligent Control System and Intelligent Equipment Yanshan University Qinhuangdao066004 China School of Electrical Engineering Yanshan University Qinhuangdao066004 China

Traffic flow prediction is a vital part of an intelligent traffic management system. The critical challenge of the traffic flow prediction task is to fully use observable historical information to extract the hidden spatiotemporal dependence. For this reason, a synchronous spatiotemporal grammar graph attention network is proposed based on multi-dimensional edge information (MDEI-SSTGGAT) to achieve short-term traffic flow prediction tasks. In the designed model, the spatial nodes are first clustered. Then, a local spatiotemporal graph is established for each category for extracting synchronous spatiotemporal features. In the feature extraction module, the graph attention network with multi-dimensional edge information captures the spatiotemporal features dynamically, and the grammar graph structure fuses the hidden features of three observable traffic parameters. The model fully uses observable traffic parameter features to improve the prediction accuracy while keeping the computation time short. Simulation results on real data sets show that the prediction performance of this model is better than the existing prediction methods. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： Traffic control

来源：评论

学校读者我要写书评

暂无评论

Synergy of sodium doping and nitrogen defects in carbon nitride for promoted photocatalytic synthesis of hydrogen peroxide

引用

Chinese Chemical Letters 2024年第8期35卷 324-329页

作者： Fabrice Nelly Habarugira Ducheng Yao Wei Miao Chengcheng Chu Zhong Chen Shun Mao College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai 200092China Baowu Water Technology Co. Ltd.Research InstituteShanghai 201999China

Photocatalytic synthesis of hydrogen peroxide has gradually become a promising method for in-situ pro-duction of hydrogen peroxide,which relies on sustainable solar ***,the commonly used photocatalyst,i.e.,carbon nitride(CN),still suffers from the drawbacks of narrow light absorption range and fast charge ***,we report a facile method to introduce nitrogen defects into carbon nitride together with sodium *** adjusting the ratio of sodium dicyandiamide,the band gap of carbon nitride can be controlled,while the carrier separation and transfer ability of carbon nitride is *** modified CN with sodium doping and nitrogen defect(SD-CN)demonstrates outstanding H_(2)O_(2)pro-duction performance(H_(2)O_(2)yield rate of 297.2μmol L^(−1)h^(−1))under visible light irradiation,which is approximately 9.8 times higher than that of pristine *** work deepens the understanding of the coordinated effect of structural defect and element doping of carbon nitride on the photocatalytic H_(2)O_(2)production performance,and provides new insight into the design of photocatalytic system for efficient production of H_(2)O_(2).

关键词： Photocatalysis H_(2)O_(2)evolution Sodium doping Nitrogen defect Metal-free catalyst

来源：评论

学校读者我要写书评

暂无评论

A Line Complex-Based Evolutionary Algorithm for Many-Objective Optimization

引用

IEEE/CAA Journal of Automatica Sinica 2023年第5期10卷 1150-1167页

作者： Liang Zhang Qi Kang Qi Deng Luyuan Xu Qidi Wu the Department of Control Science and Engineering Tongji UniversityShanghai 201804 the Jiangsu Province Support Software Engineering R&D Center for Modern Information Technology Application in Enterprise Suzhou 215104China the Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China

In solving many-objective optimization problems(MaO Ps),existing nondominated sorting-based multi-objective evolutionary algorithms suffer from the fast loss of selection *** candidate solutions become nondominated during the evolutionary process,thus leading to the failure of producing offspring toward Pareto-optimal front with *** we find a more effective way to select nondominated solutions and resolve this issue?To answer this critical question,this work proposes to evolve solutions through line complex rather than solution points in Euclidean ***,Plücker coordinates are used to project solution points to line complex composed of position vectors and momentum *** position vectors of the solution points,momentum vectors are used to extend the comparability of nondominated solutions and enhance selection ***,a new distance function designed for high-dimensional space is proposed to replace Euclidean distance as a more effective distancebased *** on them,a novel many-objective evolutionary algorithm(MaOEA)is proposed by integrating a line complex-based environmental selection strategy into the NSGAⅢ*** proposed algorithm is compared with the state of the art on widely used benchmark problems with up to 15 *** results demonstrate its superior competitiveness in solving MaOPs.

关键词： Environmental selection line complex many-objective optimization problems(MaOPs) Plücker coordinate

来源：评论

学校读者我要写书评

暂无评论

Cyclocarysaponins A–J,dammarane-type triterpenoid glycosides from the leaves of Cyclocarya paliurus

引用

Chinese Journal of Natural Medicines 2024年第10期22卷 955-964页

作者： XI Huiting YUAN Mingming XIE Jianhua WANG Yuanxing State Key Laboratory of Food Science and Resources Nanchang UniversityNanchang 330047China Jiangxi Institute for Drug Control NMPA Key Laboratory of Quality Evaluation of Traditional Chinese Patent MedicineJiangxi Provincial Engineering Research Center of Drug and Medical Device QualityNanchang 330029China

Ten previously undescribed dammarane-type triterpenoid glycosides,cyclocarysaponins A–J(1–10),were isolated from the leaves of Cyclocarya paliurus(Batal.)*** structures of these compounds were characterized through detailed spectroscopic analysis,including 1D and 2D nuclear magnetic resonance(NMR)and high-resolution electrospray ionization mass spectrometry(HR-ESI-MS).The cytotoxic activities of all isolates were assessed against five human cancer cell lines(Bel-7402,Caski,BGC-823,A2780,and HCT-116).Of the tested compounds,compounds 1,7,and 9 exhibited selective cytotoxicity against one or more human cancer cell lines.

关键词： Cyclocarya paliurus Juglandaceae Triterpenoid glycosides Cyclocarysaponin Cytotoxic activities

来源：评论

学校读者我要写书评

暂无评论

Fluorescence sensor based on IFE between AEP@UCNPs and oxTMB for the determination of Cd^(2+)in paddy rice combined with HRP enzyme inhibition mechanism

引用

Food science and Human Wellness 2025年第1期14卷 154-160页

作者： Haizhen Ding Shuai Hou Siqi Zhao Liping Guo Ao Sun Qiuhui Hu Leiqing Pan Qiang Liu Chao Ding Collaborative Innovation Center for Modern Grain Circulation and Safety Key Laboratory of Grains and Oils Quality Control and ProcessingCollege of Food Science and EngineeringNanjing University of Finance and EconomicsNanjing 210023China College of Food Science and Technology Nanjing Agricultural UniversityNanjing 210095China

Cadmium ion(Cd^(2+))detection technology plays a prominent role in food safety and human ***,we designed and constructed an 2-aminoethyl dihydrogen phosphate(AEP)@upconversion nanoparticles(UCNPs)fluorescence sensor for quantitative detection of Cd^(2+)in paddy rice based on inner filter effect(IFE)combined with enzyme inhibition *** AEP modification UCNPs can offer a stable fluorescence donor at 658 nm and be quenched by the oxidized tetramethylbenzidine(oxTMB)catalyzed by horseradish peroxidase(HRP)*** addition of Cd^(2+),the fluorescence of AEP@UCNPs fluorescence sensor was weaken due to the IFE between AEP@UCNPs and *** addition of Cd^(2+),HRP enzyme activity was inhibited by Cd^(2+),leading to the decreased oxTMB,resulting in the enhance upconversion fluorescence *** a result,the fluorescence intensity signal at 658 nm of the IFE-based AEP@UCNPs fluorescence sensor increased linearly with the increase in Cd^(2+)in a wide range from 0.5μmol/L to 6μmol/L and the limit of detection(LOD)was 24.6 n mol/*** addition,our proposed IFE-based AEP@UCNPs fluorescence sensor can achieve Cd^(2+)detection in paddy rice in 30 min.

关键词： Paddy rice Cd^(2+) Enzyme inhibition Upconversion nanoparticles(UCNPs) Inner filter effect(IFE)

来源：评论

学校读者我要写书评

暂无评论

Modeling the Alienability of an Electronic Document 1

引用

7th Computational Methods in Systems and Software, CoMeSySo 2023

作者： Solovyev, Alexander V. Federal Research Center "Computer Science and Control" of the Russian Academy of Scienes 44/2 Vavilova Street Moscow119333 Russia

ISBN: (数字)9783031535529

ISBN: (纸本)9783031535512

The article considers aspects of mathematical modeling of the alienability of an electronic document from the software and hardware environment for its storage. Alienability refers to the possibility of extracting an electronic document from the current hardware and software storage environment and placing it in a new one, where it must also be stored, independent of the storage environment and interpreted. A distinctive feature of the electronic document storage environment is mobility and variability, as well as susceptibility to parametric disturbances. It follows from this that during long-term storage, an electronic document, as a control object, should be maximally stabilized in terms of its main characteristic-safety. To do this, in particular, it should be as independent as possible from the storage environment. As a measure of independence, a mathematical model for assessing the risk of inalienability of a document from the storage environment is proposed. The practical use of the proposed modeling aspects in a number of electronic archive projects, as well as the performed preliminary calculations, give reason to believe that the presented model is adequate for the conditions of the long-term storage problem. #COMESYSO1120. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Risk assessment

来源：评论

学校读者我要写书评

暂无评论

research on Low-Temperature Pull and Deflection Characteristics of Aerospace Power Supply 11th

Research on Low-Temperature Pull and Deflection Characterist...

引用

11th Frontier Academic Forum of Electrical engineering, FAFEE 2024

作者： Zhang, Yuhuan Liu, Mi Guo, Chuanwei Ma, Tao zhao, Chuang Li, Xinxin Chen, Yonggang Li, Yan Beijing Spacecrafts Beijing100094 China Beijing Space Power Conversion and Control Engineering and Technology Research Center Beijing100094 China

ISBN: (纸本)9789819788316

Deep space exploration is an important field of space exploration and astronautical activities in today's world, which is of great significance to the development of human civilization. Aerospace power supply system is an important part of the power supply system for deep space exploration, so research on its low-temperature pull and deflection characteristics is particularly important. In this paper, the low-temperature pull-off characteristics of the Aerospace Power Supply are verified and enhanced. Firstly, the application circuit of VDMOS, which is the core component of aerospace power supply, is analyzed, and two different working modes, namely, single switching application and high frequency switching application, are summarized. Secondly, the low-temperature pull-off test of aerospace power supply is carried out to compare and analyze with the normal temperature pull-off test to identify the reasons for poor low-temperature pull-off characteristics.. Finally, the low-temperature pull-off control link is analyzed, and the solution is given and verified through the test, which improves the low-temperature pull-off characteristics of the astronautical power supply, and contributes to the development of high reliability of the power supply system for deep space exploration. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Space research

来源：评论

学校读者我要写书评

暂无评论

Pyrometallurgical recycling of spent lithium-ion batteries from conventional roasting to synergistic pyrolysis with organic wastes

引用

Journal of Energy Chemistry 2023年第10期85卷 547-561,I0014页

作者： Chao Pan Yafei Shen China Energy Science and Technology Research Institute Co.Ltd. Nanjing 210023JiangsuChina Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control(AEMPC) Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044JiangsuChina

The synergistic pyrolysis has been increasingly used for recycling spent lithium-ion batteries(LIBs)and organic wastes(hydrogen and carbon sources),which are in-situ transformed into various reducing agents such as H_(2),CO,and char via carbothermal and/or gas thermal *** with the conventional roasting methods,this“killing two birds with one stone”strategy can not only reduce the cost and energy consumption,but also realize the valorization of organic *** paper concluded the research progress in synergistic pyrolysis recycling of spent LIBs and organic *** the one hand,valued metals such as Li,Co,Ni,and Mn can be recovered through the pyrolysis of the cathode materials with inherent organic materials(e.g.,separator,electrolyte)or graphite *** the pyrolysis process,the organic materials are decomposed into char and gases(e.g.,CO,H_(2),and CH_(4))as reducing agents,while the cathode material is decomposed and then converted into Li_(2)CO_(3) and low-valent transition metals or their oxides via in-situ thermal *** formed Li_(2)CO_(3) can be easily recovered by the water leaching process,while the formed transition metals or their oxides(e.g.,Co,CoO,Ni,MnO,etc.)can be recovered by the reductant-free acid leaching or magnetic separation *** the other hand,organic wastes(e.g.,biomass,plastics,etc.)as abundant hydrogen and carbon sources can be converted into gas(e.g.,H_(2),CO,etc.)and char via *** cathode materials are decomposed and subsequently reduced by the pyrolysis gas and *** addition,the pyrolysis oil and gas can be upgraded by catalytic reforming with the active metals derived from cathode ***,great challenges are proposed to promote this promising technology in the industrial applications.

关键词： Synergistic pyrolysis Spent LIBs Biomass Recycling Reduction roasting

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：