检索结果-内蒙古大学图书馆

Seismic Survey in Lesser Himalayan Thrust Belt, Western Nepal

INTERNATIONAL JOURNAL OF GEOPHYSICS 2022年第0期2022卷

作者： Li, Zhongxiong Li, Qinru zhang, Duorong Tan, fuwen Rajaure, Sudhir Zhao, Gang Tripathi, Ganesh Nath Du, Baiwei Yang, Ping Chengdu Inst Geol & Mineral Resources Chengdu Sichuan Peoples R China Harbin Inst Technol Weihai Shandong Peoples R China CNPC BGP Zhuozhou Hebei Peoples R China Dept Mines & Geol Kathmandu Nepal

Two hundred km of 2D seismic survey was carried out at the Lesser Himalayan Thrust Belts in Dailekh district, western Nepal. The main motivation is to elucidate the geologic relationship between the known oil and gas seeps, subsurface structure, and stratigraphy in the area. This is a challenging task which is from its extreme structural and geological complexity such as thrust faulting, tight folding, steep dip layers, and strong lateral variations in seismic velocity. Seismic data were acquired with SERCEL 428XL system and processed by GEOEAST computer software. In order to increase signal-to-noise ratio (SNR), suppress interference, and search for optimum acquisition parameters, a series of comparative tests on the different charge depth and size, group interval, CDP fold, geophone array, and single high-sensitivity geophone were conducted. We also tested 2S3L (two lines shooting and three lines receiving) wide line profiling. The results indicate that single hole with charge depth of 12 m, 4-16 kg charge size (less charge size for the densely populated areas), single high-sensitivity geophone, and 1S2L wide line profiling with 132 folds are the optimum acquisition parameters. On the basis of comparative process experiment, data processing workflow consisting of data preparation, prestack denoising, amplitude compensation, deconvolution, tomography static correction, velocity analysis, residual static correction, CRS stack, poststack migration, prestack time migration (PSTM), and prestack depth migration (PSDM) was selected. Maybe affected by problem of conflicting dip in complex media, CRS stack section does not show satisfactory geological characteristics. PSTM profile has moderate signal-to-noise (S/N) ratio;the shallow, medium, and deep continuous reflections can be observed in section. More details of the geological structures can be observed in PSDM section, especially in medium and shallow layers (less than 3000 ms or 4000 m), but PSDM method is more expen

关键词：

来源：评论

学校读者我要写书评

暂无评论

A Short-term Traffic Forecasting Model Based on Wavelet Neural Network with Novel Teaching Learning Based Optimization

A Short-term Traffic Forecasting Model Based on Wavelet Neur...

引用

Chinese Control Conference (CCC)

作者： Qingyong zhang Ziliu Ye Yuechen Ding fuwen Su School of Automation Wuhan University of Technology Wuhan China School of Computer Science and Technology Wuhan University of Technology Wuhan China

ISBN: (数字)9789881563903

ISBN: (纸本)9781728165233

Short-term traffic flow prediction is of vital significance to traffic monitoring and induction. It is a nonlinear problem with considerable uncertainty. In this paper, a novel teaching-learning based optimization (NTLBO) algorithm is proposed for wavelet neural network, whose parameters are optimized by NTLBO. Parameters of the network are divided into four parts to initialize the population of the novel algorithm. The four parts of parameters are optimized separately in teaching process. A self-learning process for teacher is attached as well to combine local search strategy and global search method in network training, which enhance the search ability of the algorithm. Finally, the model will be verified by time-series data, compared with other neural network methods. The final experimental results indicates that the new algorithm performs better in forecasting and nonlinear curve fitting.

关键词： Forecasting Optimization Mathematical model Predictive models Neural networks Training

来源：评论

学校读者我要写书评

暂无评论

Intelligent Fire-fighting robot based on STM32

Intelligent Fire-fighting robot based on STM32

引用

2019 Chinese Automation Congress, CAC 2019

作者： Ye, Ziliu Su, fuwen zhang, Qingyong Wan, Lili Wuhan University of Technology School of Autontation Wuhan430070 China

ISBN: (纸本)9781728140940

In recent years, fires frequently occur. Property damage and casualties caused by fires are very serious. The scene of the fire is very complicated and rescue operations are difficult to carry out in time. In order to solve this problem, this paper designs an intelligent fire-fighting robot based on STM32 which includes control circuit, motor drive circuit and power circuit. In the aspect of software system, this paper designs attitude control algorithm and steering algorithm. To get the data needed by the software algorithm, lots of sensors are used. JY - 901 attitude sensor gets the current robot attitude information, the photoelectric sensor, flame sensor and ultrasonic sensor get the environmental information, then pass the information to the controller. The intelligent fire- fighting robot realizes the function of tracking and avoiding obstacles in the complex environment and finding the fire source independently. © 2019 IEEE.

关键词： Fires

来源：评论

学校读者我要写书评

暂无评论

浅析电驱总成主动加热技术

引用

汽车实用技术 2024年第24期49卷 15-18页

作者：张松林喻皓赵小坤陈广林王敷玟广汽埃安新能源汽车股份有限公司广东广州511434

随着新能源汽车行业的快速发展,竞争日益加剧,车企在整车减重降本、技术创新方面的要求越来越高,热管理系统的能量利用率、集成度成为产品竞争力的核心要素之一,电驱总成的热能利用成为行业研究的重要课题。文章通过电驱总成主动加热技... 详细信息

随着新能源汽车行业的快速发展,竞争日益加剧,车企在整车减重降本、技术创新方面的要求越来越高,热管理系统的能量利用率、集成度成为产品竞争力的核心要素之一,电驱总成的热能利用成为行业研究的重要课题。文章通过电驱总成主动加热技术在整车上的搭载测试,分析主动加热的影响因素、性能表现和应用难点,探讨如何改善主动加热性能表现和能量利用率、提升该技术应用可行性,以实现热管理系统高度集成,降低整车重量和成本、改善电动汽车低温适应性,提升用户体验,具有实际的指导意义,也为后续电驱总成的主动加热技术开发提供了可借鉴参考的经验。

关键词：电动汽车主动加热技术电驱总成系统热管理系统低温性能

来源：评论

学校读者我要写书评

暂无评论

Research on the Splicing Performance of G.654.E Optical Fiber

Research on the Splicing Performance of G.654.E Optical Fibe...

引用

Asia Communications and Photonics Conference and Exhibition (ACP)

作者： Guangzhe Wu Xiaomeng Xia Tong Chen Hongyan Zhou Chao Hu Liyan zhang Li Deng Ying Wang Can Li Chao Ma Yang Li Yang Liu fuwen Bai Wei Jin Jun Wu State Grid Information & Telecommunication Branch Beijing China Key Laboratory of Optical Fibre and Cable Manufacture Technology Optics Valley Laboratory Yangtze Optical Fibre and Cable Joint Stock Limited Company Wuhan China

Novel G.654.E has been large-scale deployed in optical communication network, so it has become urgent problems to reduce the splicing loss, improve the success probability of in one splicing and unsatisfactory splicing loss from different manufacturers in practical engineering applications. Based on the theory of single-mode fiber splicing loss testing, we obtained a large number of laboratory experiment data and practical network engineering data to verify the splicing performance form the same and different manufacturers of G.654.E fiber in various aspects based on different splicing machines. And also we propose a targeted splicing optimization scheme for practical engineering applications. All of the research provides a guidance for engineering application of G.654.E optical fiber in practical network engineering.

关键词：

来源：评论

学校读者我要写书评

暂无评论

纤维增强水泥基复合材料加固震损RC框架抗震性能试验研究

引用

建筑结构学报 2017年第6期38卷 61-69页

作者：张富文李向民王卓琳陈溪许清风上海市建筑科学研究院(集团)有限公司上海市工程结构安全重点实验室上海200032

针对震损钢筋混凝土框架,提出了基于纤维增强水泥基复合材料(ECC)的加固修复方法,并开展了振动测试和低周反复荷载试验。研究结果表明:震损加固框架在加载试验后的基本频率仅下降了6.8%,损伤程度较轻,屈服和峰值荷载时的顶点位移角分别... 详细信息

针对震损钢筋混凝土框架,提出了基于纤维增强水泥基复合材料(ECC)的加固修复方法,并开展了振动测试和低周反复荷载试验。研究结果表明:震损加固框架在加载试验后的基本频率仅下降了6.8%,损伤程度较轻,屈服和峰值荷载时的顶点位移角分别为1/48和1/25,破坏时位移角超过1/19。震损加固框架的峰值荷载较未损伤原框架提高了9.6%,表明ECC加固修复震损框架的方法能够使其抗震承载能力完全恢复并略高于原框架;ECC加固震损框架的耗能能力也可恢复至原框架的水平。此外,ECC加固对震损框架的刚度提高有限,震损加固框架的初始刚度仅为原框架的36.0%,但刚度退化较为缓慢。应变分析结果表明,ECC置换梁端混凝土能够显著改善塑性铰区的受力性能和破坏模式。

关键词：钢筋混凝土框架纤维增强水泥基复合材料震损加固低周反复加载试验抗震性能

来源：评论

学校读者我要写书评

暂无评论

A Short-term Traffic Forecasting Model Based on Wavelet Neural Network with Novel Teaching Learning Based Optimization

A Short-term Traffic Forecasting Model Based on Wavelet Neur...

引用

第三十九届中国控制会议

作者： Qingyong zhang Ziliu Ye Yuechen Ding fuwen Su School of Automation Wuhan University of Technology School of Computer Science and Technology Wuhan University of Technology

Short-term traffic flow prediction is of vital significance to traffic monitoring and induction. It is a nonlinear problem with considerable uncertainty. In this paper, a novel teaching-learning based optimization(NTLBO) algorithm is proposed for wavelet neural network, whose parameters are optimized by NTLBO. Parameters of the network are divided into four parts to initialize the population of the novel algorithm. The four parts of parameters are optimized separately in teaching process. A self-learning process for teacher is attached as well to combine local search strategy and global search method in network training, which enhance the search ability of the algorithm. Finally, the model will be verified by time-series data, compared with other neural network methods. The final experimental results indicates that the new algorithm performs better in forecasting and nonlinear curve fitting.

关键词： Short-term traffic volume forecasting wavelet neural network teaching learning based optimization(NTLBO) local search strategy

来源：评论

学校读者我要写书评

暂无评论

Photo-Driven Ammonia Synthesis via a Proton-Mediated Photoelectrochemical Device

引用

Angewandte Chemie 2025年第8期137卷

作者： Wan Lin Jiajie Chen Xiang zhang Jing Lin fuwen Lin ShenXia Huang Prof. Yaobing Wang CAS Key Laboratory of Design and Assembly of Functional Nanostructures Fujian Provincial Key Laboratory of Nanomaterials State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 Fujian P. R. China University of Chinese Academy of Sciences Beijing 100049 P. R. China Fujian College University of Chinese Academy of Sciences Fuzhou 350002 P. R. China College of Chemistry Fuzhou University Fuzhou 350116 Fujian P. R. China. Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108 Fujian P. R. China College of Chemistry and Materials Science Fujian Normal University Fuzhou 350007 China

N 2 reduction reaction (NRR) by light is an energy-saving and sustainable ammonia (NH 3 ) synthesis technology. However, it faces significant challenges, including high energy barriers of N 2 activation and unclear catalytic active sites. Herein, we propose a strategy of photo-driven ammonia synthesis via a proton-mediated photoelectrochemical device. We used redox-catalysis covalent organic framework (COF), with a redox site (−C=O) for H + reversible storage and a catalytic site (porphyrin Au) for NRR. In the proton-mediated photoelectrochemical device, the COF can successfully store e − and H + generated by hydrogen oxidation reaction, forming COF−H. Then, these stored e − and H + can be used for photo-driven NRR (108.97 umol g −1 ) under low proton concentration promoted by the H-bond network formed between −OH in COF−H and N 2 on Au, which enabled N 2 hydrogenation and NH 3 production, establishing basis for advancing artificial photosynthesis and enhancing ammonia synthesis technology.

关键词： Photo-driven ammonia synthesis Proton-mediated N2 reduction reaction Covalent organic framework Photoelectrochemical device

来源：评论

学校读者我要写书评

暂无评论

Wildlife conservation and management in China: achievements,challenges and perspectives

引用

National Science Review 2021年第7期8卷 26-30页

作者： Guangping Huang Xiaoge Ping Weihua Xu Yibo Hu Jiang Chang Ronald R.Swaisgood Jiang Zhou Xiangjiang Zhan Zejun zhang Yonggang Nie Jie Cui Michael Bruford Zhihe zhang Baoguo Li Li zhang Zhi Lv fuwen Wei CAS Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Endangered Species Scientific Commission of the People's Republic of China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Center for Excellence in Animal Evolution and Genetics Chinese Academy of Sciences State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Institute for Conservation Research School of Karst Sciences Guizhou Normal University Key Laboratory of Southwest China Wildlife Resources Conservation (Ministry of Education) China West Normal University Center for Nature and Society College of Life Sciences Peking University CAS Key Laboratory of Molecular Virology & Immunology Institute Pasteur of Shanghai Chinese Academy of Sciences Sustainable Places Research Institute Cardiff University Sichuan Academy of Giant Panda Shaanxi Key Laboratory for Animal Conservation Northwest University Key Laboratory for Biodiversity and Ecological Engineering of Ministry of Education College of Life Sciences Beijing Normal University Center for Evolution and Conservation Biology Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)

Dramatic global changes to the environment have wrought unprecedented reductions in biodiversity, with>28%species assessed by the International Union for Conservation of Nature(IUCN) under the threat of extinction[1]. China, as one of the world’s megadiverse countries, plays a critical role in global biodiversity conservation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

碱溶液浸种对花椒种子发芽的影响

引用

西部林业科学 2024年第4期53卷 29-34,51页

作者：他富文李莲芳蒙进芳吴剑呼延丽唐宗英于国栋张国鑫西南林业大学林学院云南昆明650224 云南省林业和草原科学院云南昆明650201 昆明市林业和草原科技推广总站云南昆明650204 云南林业职业技术学院云南昆明650224

为确定不同碱溶液类型、不同浓度和不同浸种时间对花椒种子发芽的影响,采用L_(9)(3^(4))正交设计开展试验,观测发芽动态,统计种子的发芽率、发芽势、发芽指数和平均发芽时间。结果显示,9个处理组合的发芽率、发芽势、发芽指数和平均发... 详细信息

为确定不同碱溶液类型、不同浓度和不同浸种时间对花椒种子发芽的影响,采用L_(9)(3^(4))正交设计开展试验,观测发芽动态,统计种子的发芽率、发芽势、发芽指数和平均发芽时间。结果显示,9个处理组合的发芽率、发芽势、发芽指数和平均发芽时间分别为24.67%~41.67%、15.00%~33.33%、0.33~1.27粒·d^(-1)和115.73~132.90 d,对照分别为35.33%、16.67%、0.7粒·d^(-1)和130.33 d,9个处理组合间具有显著(P<0.05)或极显著(P<0.01)差异,其中0.5%的Na_(2)CO_(3)溶液浸种4 h的发芽性状(指标)最优。影响花椒种子发芽率、发芽指数和平均发芽时间的主导因子是碱溶液类型,影响发芽势的主导因子是浸种时间;Na_(2)CO_(3)溶液浸种的发芽性状显著(P<0.05)或极显著(P<0.01)地优于K_(2)CO_(3)和NaOH。碱溶液浸种有益于花椒种子发芽,0.5%的Na_(2)CO_(3)溶液浸种4 h可作为提高花椒种子发芽性状的措施应用于实践中。

关键词：花椒碱溶液浸种发芽性状正交试验

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：