检索结果-内蒙古大学图书馆

26th International Congress on Sound and Vibration, ICSV 2019

作者： Zheng, Longkui Xiang, Yang School of Energy and Power Engineering Wuhan University of Technology Wuhan China Key Laboratory of Marine Power Engineering and Technology Ministry of Communications Wuhan University of Technology Wuhan China

ISBN: (纸本)9781999181000

Online sequential extreme learning machine (OS-ELM) is a method of online learning, which can handle the problem of data arriving or chunk-by-chunk with varying chunk size. However, the input weights (connections between the input and hidden layers) and the hidden layer biases of OS-ELM are randomly determined, which will cause an inaccurate classification result, that varied a lot, and in the field of fault diagnosis, the diagnostic mode is mainly divided into two types: online and offline. At present, many offline learning and diagnostic methods have been proposed by researchers, but there are few online sequential learning and monitoring methods. Therefore, in this paper, a new classification method PSO-OSELM (Particle Swarm Optimization and Online Sequential Extreme Learning Machine) is proposed for classification and engineering application. In the PSO-OSELM method, PSO is used to determine the optimal input weights and thresholds of OS-ELM, which minimizing the classification error of OS-ELM. Contrastive experiments between PSO-OSELM and OSELM have been conducted on wine datasets. The results show that PSO-OSELM has higher classification accuracy than OS-ELM, and PSO-OSELM is further applied to diagnose the faults of roller bearing. It can be seen from the training and testing results that the fault classification accuracy of PSO-OSELM is better than OS-ELM © Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019. All rights reserved.

关键词： Failure analysis

来源：评论

学校读者我要写书评

暂无评论

Support Vector Machine-based Fuzzy Rules Acquisition System

引用

Journal of Shanghai Jiaotong university(Science) 2009年第5期14卷 555-561页

作者：黄细霞石繁槐顾伟陈善本 Marine Technology and Control Engineering Key Laboratory of the Ministry of Communications Shanghai Maritime University School of Material Science and Engineering Shanghai Jiaotong University

This paper proposes a support vector machine-based fuzzy rules acquisition system(SVM-FRAS) .The character of SVM in extracting support vector provides a mechanism to extract fuzzy If-Then rules from the training data *** construct the fuzzy inference system using fuzzy basis function(FBF) .The gradient technique is used to tune the fuzzy rules and the inference *** analysis and comparative tests are performed comparing with other fuzzy *** results show the SVM-FRAS model possesses good generalization capability as well as high comprehensibility.

关键词： modeling fuzzy rules support vector machine (SVM)

来源：评论

学校读者我要写书评

暂无评论

Hydrogel-anchored caffeic acid-copper ions coating: Integrated defensive and offensive strategy for synergistic antifouling

引用

Chemical engineering Journal 2025年 515卷

作者： Jingyu Niu Yiming Li Yun Shen Shideng Yuan Dong Wang Peijun Zheng Zhining Wang Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao 266237 PR China China Frontiers Science Center for Deep Ocean Multispheres and Earth System/Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China 266100 Qingdao PR China

marine biofouling poses significant global challenges for maritime activities, resulting in serious economic losses and environmental issues. Biomimetic coatings have drawn extensive attentions due to their environmentally friendly antifouling properties. Herein, an innovative strategy is reported for constructing antifouling coating composed of caffeic acid-copper ions (CA-Cu 2+ ) anchored on a Kevlar hydrogel. The resultant coating achieves good adhesion (1.3 MPa) to various substrates via the bioinspired polymerization of metal-polyphenol networks (MPNs). The hydrophilic nature and synergistic antimicrobial effects enable efficient self-cleaning, anti-protein (100 %), anti-bacterial (100 %), and anti-algae (99.84 %) performance. Strikingly, the coating exhibits superior acid and alkali tolerance, abrasive resistance, and long-term stability over 60 days in real seawater, owing to the hydrogen bonds and coordination interactions between the Kevlar hydrogel and the CA-Cu 2+ functional layer. Further research demonstrates that the antifouling performance are realized via the synergistic antifouling models. The hydration layer formed by the synergistic action of the hydrogel and CA effectively prevents the attachment of microorganisms, and the chemodynamic antibacterial mode triggered by Cu 2+ can actively kill the microorganisms adhered to the material surface. Importantly, the Cu 2+ release profile of the H/PCA-Cu coating meets the environmental requirements. The “defensive” and “offensive” integrated antifouling strategy provides groundbreaking performance for broad-spectrum biofouling control, which greatly desired for marine facilities. Our work not only expands the family of MPNs application in marine antifouling coatings, but also pioneers a rational pathway toward developing long-lasting and environmentally friendly broad-spectrum antifouling coatings.

关键词：

来源：评论

学校读者我要写书评

暂无评论

0.75 Gbit/s high-speed classical key distribution with mode-shift keying chaos synchronization of Fabry–Perot lasers

引用

Light(Science & Applications) 2021年第9期10卷 1780-1788页

作者： Hua Gao Anbang Wang Longsheng Wang Zhiwei Jia Yuanyuan Guo Zhensen Gao Lianshan Yan Yuwen Qin Yuncai Wang Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuanChina College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuanChina School of Information Engineering Guangdong University of TechnologyGuangzhouChina Guangdong Provincial Key Laboratory of Photonics Information Technology GuangzhouChina Center for Information Photonics and Communications School of Information Science and TechnologySouthwest Jiaotong UniversityChengduChina

High-speed physical key distribution is diligently pursued for secure *** this paper,we propose and experimentally demonstrate a scheme of high-speed key distribution using mode-shift keying chaos synchronization between two multi-longitudinal-mode Fabry–Perot lasers commonly driven by a super-luminescent *** users dynamically select one of the longitudinal modes according to private control codes to achieve mode-shift keying chaos *** two remote chaotic light waveforms are quantized to generate two raw random bit streams,and then those bits corresponding to chaos synchronization are sifted as shared keys by comparing the control *** this method,the transition time,i.e.,the chaos synchronization recovery time is determined by the rising time of the control codes rather than the laser transition response time,so the key distribution rate is improved *** experiment achieved a 0.75-Gbit/s key distribution rate with a bit error rate of 3.8×10^(−3)over 160-km fiber transmission with dispersion *** entropy rate of the laser chaos is evaluated as 16 Gbit/s,which determines the ultimate final key rate together with the key generation *** is therefore believed that the method pays a way for Gbit/s physical key distribution.

关键词： Gbit/s synchronization chaos

来源：评论

学校读者我要写书评

暂无评论

The seismogenic structure of strong intraplate earthquakes in Shantou region, South China: Insights from upper crustal shear-wave velocity structure

引用

Earthquake Research Advances 2025年

作者： Lue Yang Lun Li Xiuwei Ye Jinming Zhang Jialong He Yuan Gao Pengfei Li Yu He Ziwei Li School of Earth Sciences and Engineering Sun Yat-Sen University and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) 519082 China China Earthquake Administration Key Laboratory of Earthquake Monitoring and Disaster Mitigation Technology Guangdong Earthquake Agency Guangzhou 510070 China Guangdong Science and Technology Collaborative Innovation Center for Earthquake Prevention and Disaster Mitigation Guangzhou 510070 China Key Laboratory of Disaster Forecast and Control in Engineering of the Ministry of Education Urban Earthquake Safety Laboratory Guangzhou 510070 China

The Shantou region, one of the most seismically active zones of Guangdong Province (South China), has experienced multiple strong earthquakes including two significant events with magnitudes greater than 7.0 occurred in 1600 and 1918, respectively. To investigate the seismogenic structures responsible for these major earthquakes and their potential triggering mechanisms, in this study, we construct a high-resolution shear-wave velocity model from surface to ∼15 km depth based on a dense nodal seismic array using ambient noise tomography. The model reveals a pronounced low-velocity zone (LVZ) at depths of 2-15 km, with a perturbation of -2 to -8%, coinciding with the northwestern extension of the Huanggangshui Fault previously identified in the offshore region. Integrating our results with previous field geological surveys and shallow reflection seismic exploration, we interpret the LVZ as a wide fault zone, potentially comprising multiple fault branches that possibly includes two NW-trending faults (i.e., the Rongjiang Fault and the Hanjiang Fault). Notably, the interaction between the Huanggangshui Fault and NE-trending Littoral Fault is suggested to have triggered the 1918 M7.3 Nan’ao earthquake. Additionally, the 1895 M6.2 earthquake seems to occur at the edge of the LVZ near the Rongjiang Fault, a possible branch of the Huanggangshui Fault, further supporting the association between this structure and seismic activity. These findings imply that the LVZ may represent a region of concentrated tectonic stress, making it a potential site for future strong earthquakes. Consequently, this area should be prioritized in seismic hazard assessments. This study provides valuable insights into the seismogenic characteristics of the Shantou region and contributes to improving seismic hazard evaluations in South China.

关键词： Intraplate earthquakes Nan’ao earthquake Shear-wave velocity Ambient noise tomography Dense seismic array

来源：评论

学校读者我要写书评

暂无评论

Adaptative study of closed and semi-closed noise barriers in a 3D ray tracing method

Adaptative study of closed and semi-closed noise barriers in...

引用

International Conference on Remote Sensing, Environment and Transportation engineering (RSETE)

作者： Liu, Zhi-Hong Wang, Yan-Qin Wei, Xian-Wei School of Marine Technology Environment Engineering NWPU Xi'An China Research Institute of Highway Ministry Transport State Environment Protection Engineering Center of Traffic Noise Control Key Laboratory of Environment Protection Technology on Road Traffic Ministry of Communications BeiJing China

ISBN: (纸本)9781424491711

Closed barrier and semi-closed barrier are presented in the paper, the adaptive research is performed. Reducing effect of noise barrier with closed and semi-closed structure was studied by noise simulating program - RAYNOISE. The applied range of the closed and semi-closed noise barrier is confirmed. Simulating results showed that noise reduction of closed-shaped structure has good reducing effect at higher area of the shadow area. The noise reduction is 6dB(A) at the receiving point 22.2m height and 60m far behind the noise barrier, which is 1dB(A) higher than the semi-closed noise barrier. So it is suitable for higher receiving point. Semi-closed-shaped noise barrier has a good reducing noise effect at the area lower than 3m. © 2011 IEEE.

关键词： Noise abatement

来源：评论

学校读者我要写书评

暂无评论

Method study for RT-Flex HPCR low-speed diesel engine injecting law measuring

Method study for RT-Flex HPCR low-speed diesel engine inject...

引用

International Conference on Mechanical and Electrical technology

作者： Wang, Zheng Yang, Jian-Guo Energy and Power Engineering School Wuhan University of Technology Wuhan China Key Laboratory of Marine Power Engineering and Technology under Ministry of Communications Wuhan University of Technology Wuhan China

ISBN: (纸本)9781424481019

For researching the injecting law of low-speed HPCR diesel engine, a novel measuring method is *** method provide a certain reference to solve the problem that RT-Flex HPCR low-speed diesel engine fuel injection law can not be measured directly under the present conditions. Under different load working conditions on the RT-Flex60C low-speed diesel engine HPCR (high pressure common-rail) HIL(Hardware In the Loop)test platform, pressure curves at the outlet of high-pressure fuel pipe where connected with injector are measured, and a multi-hole injector model of RT-Flex60C diesel engine is built with AMESim. Inputted the pressure curves into the model with ASCII code files, characteristic curves such as needle lift, injector injecting rate, injecting rate and pressure of each hole on nozzle, fuel quantity injected and returned during 180 second are calculated. Experamental result indicated that the calculated needle lift curves are consistent with the curves measured on test platform, the injected and returned fuel quantity during 180 second are in line with the data measured on real engine. © 2010 IEEE.

关键词： Diesel engines

来源：评论

学校读者我要写书评

暂无评论

The visualization of turbulent coherent structure in open channel flow

引用

Journal of Hydrodynamics 2019年第2期31卷 266-273页

作者： Xiao-dong Bai Wei Zhang Qing-he Fang Yong Wang Jin-hai Zheng An-xin Guo Ministry of Education Key Laboratory of Coastal Disaster and Defence Hohai UniversityNanjing 210098China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 21009China Science and Technology on Water Jet Propulsion Laboratory Marine Design and Research Institute of ChinaShanghai 200011China Ministry of Education Key Laboratory of Structural Dynamic Behavior and Control School of Civil EngineeringHarbin Institute of TechnologyHarbin 150090China Max Planck Institute for Dynamics and Self-Organization GottingenGermany

Due to its multiscale and multi-layer natures,the coherent structures of turbulent in the open channel flow is complex and difficult to be visualized for understanding its *** this paper,five types of methods for the vortical structure in the fluids,namely the Q-criterion,the vorticity,the Omega method,the velocity-vorticity correlation structures(VVCS)as well as the most recent Rortex method,are adopted to visualize the turbulent flow in the open *** the free surface modelled as a free slip boundary,a direct numerical simulation(DNS)is carried out to study the multi-layered flow structure characteristics under the free *** visualization results by the Q-criterion,the vorticity,the Omega method and the Rortex are firstly *** the turbulent flow layers near the free surface are identified with corresponding anisotropy ***,the VVCS within various turbulence layers are visualized *** research indicates that the VVCS can straightforwardly show the geometry information of the cohere nt structures of turbulent in different layers for the ope n channel flow.

关键词： Open channel flow flow visualization velocity-vorticity coherent structure direct numerical simulation(DNS)

来源：评论

学校读者我要写书评

暂无评论

Enhanced Biodegradation of High-Salinity and Low- Temperature Crude-Oil Wastewater by Immobilized Crude-Oil Biodegrading Microbiota

引用

Journal of Ocean University of China 2022年第1期21卷 141-151页

作者： HUANG Xiao ZHOU Ting CHEN Xi BAI Jie ZHAO Yangguo Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China The Key Laboratory of Marine Environmental Science and Ecology Ministry of EducationOcean University of ChinaQingdao 266100China Harbin Institute of Technology(Shenzhen) Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution ControlShenzhen 518055China

High salt and low temperature are the bottlenecks for the remove of oil contaminants by enriched crude-oil degrading microbiota in Liaohe Estuarine Wetland(LEW),*** improve the performance of crude-oil removal,microbiota was further immobilized by two methods,i.e.,sodium alginate(SA),and polyvinyl alcohol and sodium alginate(PVA+SA).Results showed that the crude oil was effectively removed by the enrichment with an average degrading ratio of 19.42-31.45 mg(L d)^(−1).The optimal inoculum size for the n-alkanes removal was 10%and 99.89%.Some members of genera Acinetobacter,Actinophytocola,Aquabac-terium,Dysgonomonas,Frigidibacter,Sphingobium,Serpens,and Pseudomonas dominated in crude-oil degrading *** the removal efficiency was lower than free bacteria when the temperature was 15℃,SA and PVA+SA immobilization im-proved the resistance to *** composite crude-oil degrading microbiota in this study demonstrated a perspective potential for crude oil removal from surface water under high salinity and low temperature conditions.

关键词： crude-oil degrading microbiota microbial community immobilization high salinity low temperature

来源：评论

学校读者我要写书评

暂无评论

Investigation on the flexural behavior of corroded concrete beams repaired by CFRP sheet under different corrosion levels

引用

Open Civil engineering Journal 2016年 10卷 598-614页

作者： Su, Linwang Cai, Jian Chen, Qingjun Li, Guobao Zhao, Juan State Key Laboratory of Subtropical Building Science School of Civil Engineering and Transportation South China University of Technology Guangzhou510640 China CCCC Fourth Harbor Engineering Institute Co. Ltd. Guangzhou510230 China Key Laboratory of Durability Technology for Harbor and Marine Structure Ministry of Communications PRC Guangzhou510230 China

The paper presents an investigation on the flexural behavior of corroded reinforced concrete (RC) beam strengthened with Carbon Fiber Reinforced Polymer (CFRP) sheets. Different levels of corrosion are considered as a new method for classifying the corrosion levels of the corroded RC members. Twenty RC beams with five corrosion levels were fabricated by accelerated corrosion equipment, and then the CFRP were used to strengthen these members, considering the effect of different CFRP layers and different strengthened schemes, finally the static flexural load test was carried out. The test results show that the bearing capacity of the CFRP strengthening corroded RC beams is effectively enhanced, the crack width is restrained, and the flexural stiffness is improved. The ultimate flexural capacity of the specimens strengthened by one layer of CFRP sheet raises by 30% to 50% than that of the unstrengthened ones, with the increase of the corrosion level, the enhancement decreased. With the increase of the number of CFRP layers, the bearing capacity increases, while the increasing ratio reduces with the increase in the number of layers. For specimens with obvious cracks, the effectiveness of the strengthening method by bonding CFRP after cutting or chiseling off concrete method (RM1 or RM2) is higher than the method of bonding CFRP directly (DM). It is suggested that the corroded RC members with Level A, B or C1 can be strengthened by DM, while the other level members should be strengthened by RM1 or RM2. The formulae in current design code are used to predict the flexural bearing capacity of the RC beam strengthened with CFRP and their results are compared with experimental ones. A revised formula that can give a better prediction for multi-layer CFRP strengthening members is also proposed. © Linwang et al.

关键词： Reinforced concrete

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：