检索结果-南通市图书馆

Editorial:Secure and Safe Meta Control for Cyber Physical Systems

在线全文

学校读者我要写书评

暂无评论

IEEE/CAA Journal of Automatica Sinica 2023年第12期10卷 2177-2178页

作者： Qing-long Han IEEE the School of Science Computing and Engineering TechnologiesSwinburne University of TechnologyMelbourneVIC 3122Australia

Welcome to the twelfth issue of 2023 in the IEEE/CAA Journal of Automatica Sinica(JAS).In the sixth issue of2023,I systematically addressed the latest development of Meta Vehicles,and sorted out some important contributions published in the IEEE/CAA JAS focusing on control,estimation,and optimization of automated vehicles with reliability,security,efficiency,and intelligence.

关键词： Secure automated estimation

Latest research progress for LBE coolant reactor of China initiative accelerator driven system project

在线全文

学校读者我要写书评

暂无评论

Frontiers in Energy 2021年第4期15卷 810-831页

作者： long GU Xingkang SU Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology University of Chinese Academy of SciencesBeijing 100049China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China

China’s accelerator driven subcritical system(ADS)development has made significant progress during the past *** the successful construction and operation of the international prototype of ADS superconducting proton linac,the lead-based critical/subcritical zero-power facility VENUS-II and the comprehensive thermal-hydraulic and material test facilities for LBE(lead bismuth eutectic)coolant,China is playing a pivotal role in advanced steady-state operations toward the next step,the ADS *** China initiative Accelerator Driven System(CiADS)is the next facility for China’s ADS program,aimed to bridge the gaps between the ADS experiment and the LBE cooled subcritical *** total power of the CiADS will reach 10 *** CiADS engineering design was approved by Chinese government in *** then,the CiADS project has been fully transferred to the construction application *** subcritical reactor is an important part of the whole CiADS ***,a pool-type LBE cooled fast reactor is chosen as the subcritical reactor of the *** and thermal experiments and software development for LBE coolant were conducted simultaneously to support the design and construction of the CiADS LBEcooled subcritical ***,it is necessary to introduce the efforts made in China in the LBE-cooled fast reactor to provide certain supporting data and reference solutions for further design and development for ***,the roadmap of China’s ADS,the development process of the CiADS,the important design of the current CiADS subcritical reactor,and the efforts to build the LBE-cooled fast reactor are presented.

关键词： LBE(lead bismuth eutectic)coolant reactor China initiative Accelerator Driven System(CiADS)project research progress

在线全文

学校读者我要写书评

暂无评论

水下舰艇扩频通信体制研究

现代电子技术 2025年第1期48卷 107-111页

作者：李尧赵健康龙海辉上海交通大学电子信息与电气工程学院上海200240

水下舰艇通信采用的水声通信方式在长距离传输中信号衰减严重,且因为隐蔽性需求信号功率受限,叠加受到多径干扰和海洋背景噪声干扰,通信误码率较高。为此,提出水下舰艇扩频通信体制研究。设计扩频通信体制,利用扩频通信体制拓宽传输带宽... 详细信息

水下舰艇通信采用的水声通信方式在长距离传输中信号衰减严重,且因为隐蔽性需求信号功率受限,叠加受到多径干扰和海洋背景噪声干扰,通信误码率较高。为此,提出水下舰艇扩频通信体制研究。设计扩频通信体制,利用扩频通信体制拓宽传输带宽,提升远距离衰减下的通信信噪比;采用类白噪声的伪随机码m序列和OPS序列作为扩频码组建编码序列集,解决白噪声干扰、多径干扰和码分多址的问题。测试结果表明:同等条件下,采用m序列的扩频通信结果更优,可以实现-25 dB下误码率低于1%的可靠通信。经过该方法调制后,剔除了噪声干扰和多径干扰,增强了衰减的高频信号,解决了水下通信远距离衰减、多径干扰、背景噪声干扰等问题。

关键词：水下舰艇通信扩频通信 m序列 OPS序列误码率信噪比

Photocatalytic activation of sulfite by N-doped porous biochar/MnFe_(2)O_(4) interface-driven catalyst for efficient degradation of tetracycline

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第3期9卷 481-494页

作者： long Cheng Yuanhui Ji Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research School of Chemistry and Chemical EngineeringSoutheast UniversityNanjing211189China

A novel photo-catalytic system composed of N-doped biochars(NBCs),MnFe_(2)O_(4) and sulfite activation under ultraviolet(NBCs/MnFe_(2)O_(4)/sulfite/UV)was constructed to realize the efficient eliminate of tetracycline(TC).As the carrier of MnFe_(2)O_(4),NBCs were synthesized from alfalfa,which has large specific surface area,graphite like structure and hierarchical porous *** adsorption isotherm indicated that NBCs/MnFe_(2)O_(4)-2:1 had the best adsorption performance for TC(347.56 mg g^(-1)).Through synergistic adsorption and photocatalysis,the removal rate of TC reached 84%,which was significantly higher than that of MnFe_(2)O_(4).Electrochemical impedance spectroscopy(EIS)and Photoluminescence(PL)characterization results showed that the introduction of NBCs improved the separation efficiency of photogenerated electron and hole pairs and enhanced the photocatalytic ***,the adsorption,degradation mechanism and degradation path of TC by the catalyst were systematically analyzed by coupling HPLC–MS measurement with the theoretical *** the advantages of excellent degradation performance,low cost,easy separation and environmental friendliness of NBCs/MnFe_(2)O_(4),this work was expected to provide a new path for the practical application of biochar.

关键词： Biochar MnFe_(2)O_(4) Sulfite Adsorption Photocatalysis

Optimal Resource Allocation and Feasible Hexagonal Topology for Cyber-Physical Systems

在线全文

学校读者我要写书评

暂无评论

Journal of Systems Science & Complexity 2023年第4期36卷 1583-1608页

作者： LIU Yifa CHENG long State Key Laboratory of Multimodal Artificial Intelligence Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China School of Artificial Intelligence University of Chinese Academy of SciencesBeijing 100049China

Networked cyber-physical systems are facing serious security threats from malicious *** is noted that the networked cyber-physical system should take defense measures into account at the beginning of its *** the conservative defensive perspective,this paper proposes a robust optimal defense resource allocation strategy to reduce the maximum possible losses of the networked cyber-physical system caused by potential ***,based on the robust optimal allocation strategy,it can be proved that the topology of the networked cyber-physical system has a great influence on the loss *** order to further improve security,the effects of adding redundant connections are ***,by taking geographical knowledge into account,a hexagonal construction scheme is proposed for providing a geographically-feasible and economically-viable solution for building networked cyber-physical systems,where the loss function has a cubic decay.

关键词： Cyber-physical system hexagonal city planning optimization resource allocation

Pyroxenite melting at subduction zone:Implications for the origin of mafic arc magmas

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2023年第7期66卷 1678-1682页

作者： long CHEN Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geosciences and Prospecting TechniquesMOE and College of Marine GeosciencesOcean University of ChinaQingdao 266100China

*** The oceanic arc basalts and continental arc andesites are typical products of subduction zone magmatism(Straub et al.,2011;Zheng et al.,2020).However,there has been controversy over the lithology of their magma *** this issue is closely related to both physicochemical and geodynamic mechanisms of subduction zone magmatism,it has become one of the key issues in the study of convergent plate margins(Zheng et al.,2022).

关键词： magma subduction origin

Natural selection contributes to the myopia epidemic

在线全文

学校读者我要写书评

暂无评论

National Science Review 2021年第6期8卷 128-135页

作者： Erping long Jianzhi Zhang Department of Ecology and Evolutionary Biology University of Michigan State Key Laboratory of Ophthalmology Zhongshan Ophthalmic CenterSun Yat-sen University

The prevalence of myopia, or nearsightedness, has skyrocketed in the past few decades, creating a public health crisis that is commonly attributed to lifestyle changes. Here we report an overall increase in the frequencies of myopia-associated mutant alleles over 25 years among participants of the UK *** myopia itself appears to be selected against, many of the mutant alleles are associated with reproductive benefits, suggesting that reproduction-related selection inadvertently contributes to the myopia epidemic. We estimate that, in the UK alone, natural selection adds more than 100 000 myopia cases per generation, and argue that antagonistic pleiotropy be broadly considered in explaining the spreads of apparently disadvantageous phenotypes in humans and beyond.

关键词： allele frequency natural selection antagonistic pleiotropy evolution myopia reproduction

Catalyst-Free Defluorosilylation for Synthesis of Silylated gem-Difluoroalkenes and Monofluoroalkenes

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2020年第8期38卷 897-898页

作者： long-long Xi State Key Laboratory of Coordination Chemistry Chemistry and Biomedicine Innovation Center(ChemBIC)School of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu 210093China

Fluorine containing compounds have an extensive range of application in pharmaceutical and agrochemical fields,in which the C—F bond takes a decisive role.[1]Due to this fact,it is great motivation for chemists to develop expedient synthetic methods for the synthesis of structurally expanded fluorinated ***,cleavage of unactivated C—F bonds is a challenge to make new molecular skeletons.

关键词： compounds bonds skeleton

Multi-Distributed Speech Emotion Recognition Based on Mel Frequency Cepstogram and Parameter Transfer

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

Chinese Journal of Electronics 2022年第1期31卷 155-167页

作者： LIN long TAN Liang School of Computer Science Sichuan Normal University Institute of Computing Technology Chinese Academy of Sciences

Speech emotion recognition(SER) is the use of speech signals to estimate the state of emotion. At present, machine learning is one of the main research methods of SER, the test and training data S of traditional machine learning all have the same distribution and feature space, but the data of speech is accessed from different environments and devices, with different distribution characteristics in real life. Thus, the traditional machine learning method is applied to the poor performance of SER. This paper proposes a multi-distributed SER method based on Mel frequency cepstogram(MFCC) and parameter transfer. The method is based on single-layer long short-term memory(LSTM), pre-trained inceptionv3 network and multi-distribution corpus. The speech pre-processed MFCC is taken as the input of single-layer LSTM, and input to the pre-trained inception-v3 *** features are extracted through the pre-trained inception-v3 model. Then the features are sent to the newly defined the fully connected layer and classification layer,let the parameters of the fully connected layer be finetuned, finally get the classification result. The experiment proves that the method can effectively complete the classification of multi-distribution speech emotions and is more effective than the traditional machine learning framework of SER.

关键词： multidistribution corpus fully connected layer feature extraction speech signals machine learning method pre-trained inception-v3 model multidistributed speech emotion recognition pre-trained inception-v3 network feature space recurrent neural nets Mel frequency cepstogram parameter transfer single-layer LSTM speech pre-processed MFCC learning (artificial intelligence) speech recognition emotion recognition multidistributed SER method multidistribution speech emotions