检索结果-内蒙古大学图书馆

作者： Fei Li Xingjie He Zhuoyao Tang Xiaoqiang Xu Chuanhao Hu Xu Hong Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province College of Nuclear Technology and Automation Engineering Chengdu University of Technology

Red tourism,as a form of tourism and education,has attracted much attention in recent *** old revolutionary area is a classic destination of red *** red tourism in the old revolutionary area has unique advantages in revitalizing the development of the old revolutionary ***,for different old revolutionary areas,there should be specific development ideas and *** at this problem,based on the definition and significance of red tourism,the general situation,characteristics and development goals of the old revolutionary areas in Sichuan and Shaanxi,through literature research and field investigation,this paper explores the ideas of promoting the revitalization and development of the old areas through the development of red tourism:Sichuan province and Shaanxi province should adhere to the principle of mass participation and government leadership,scientifically protect and develop excellent *** red as the main body and combining characteristics,these two provinces should enhance regional cooperation and corporate cooperation,strengthen publicity and building brands.

关键词： Red tourism Old revolutionary areas in Sichuan and Shanxi Revitalization and development

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Review of Parameter Estimation for Borehole Ultrasonic Echoes

Review of Parameter Estimation for Borehole Ultrasonic Echoe...

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IEEE International Conference on Signal and Image Processing (ICSIP)

作者： Zhenqiu Yao Xuyang Gao Wei Zhang Qi Zhu Zhipeng Li Glasgow College University of Electronic Science and Technology of China Chengdu China School of Automation Engineering University of Electronic Science and Technology of China Chengdu China Southwest Petroleum University Chengdu China

ISBN: (数字)9781728168968

ISBN: (纸本)9781728168975

This paper reviews the recent methods of ultrasonic echo signal parameter estimation in downhole instruments, the accurate measurement results of which guarantee the quality of dip calculation, hole shape analysis, and formation identification in Ultrasonic Borehole Imaging (UBI). Focusing on the time of arrival (TOA) and amplitudes inversion for ultrasonic pulse-echo signals, algorithms based on models, information criteria, and neural networks are respectively analyzed. Numerical and analytical experiments utilizing test well databases provide performance comparison and the relative merits of the aforementioned methods.

关键词： Parameter estimation Ultrasonic variables measurement Shape Shape measurement Neural networks Acoustics Parametric statistics

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Application of small sample BP neural network in quantitative analysis of EDXRF

Application of small sample BP neural network in quantitativ...

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作者： Fei Li Zhuoyao Tang Liangquan Ge Nanxing Wu Feng Cheng Kun Sun Applied Nuclear Technology in Geosciences Key Laboratory of Sichuan Province College of Nuclear Technology and Automation Engineering Chengdu University of Technology

Quantitative analysis of EDXRF is affected by matrix effect,randomness of nuclear radiation,interaction of elements,statistical fluctuation of radiation detection process,*** algorithm needs to consider many factors,and the established functional relationship is often a complex non-linear ***,effective quantitative analysis method has always been the key research direction of spectral resolution *** this paper,we use MATLAB software to study the effect of BP neural network in quantitative analysis of EDXRF by establishing the non-linear relationship between the counting rate of each element and the content of a single element in a small *** experimental results show that the small sample neural network can establish a stable structure and be applied to quantitative analysis of EDXRF,but the number of samples restricts the accuracy of prediction results,most of which can only guarantee 20% to 30% relative error.

关键词： Application of small sample BP neural network in quantitative analysis of EDXRF

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The effect of Si on the microstructure and corrosion resistance of XSi9Cr ferritic/martensitic steel in oxygen-saturated lead-bismuth eutectic

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Corrosion Science 2025年 255卷

作者： Zhang, Libo Ning, Fangqiang Yan, Hong Liu, Jia Wang, Hui School of Materials Science and Engineering Shandong University of Science and Technology Qingdao266590 China Shandong Key Laboratory of Special Metallic Materials for Nuclear Equipment Qingdao266590 China College of Materials Science and Engineering Sichuan University Chengdu610065 China

To understand the role of Si in the formation of composite oxide films, the corrosion behavior of XSi9Cr (X = 0, 0.4, 0.7, 1.0 wt%) ferritic/martensitic (F/M) steels was investigated in static oxygen-saturated lead-bismuth eutectic (LBE) at 550 °C for 1000 h. As the Si content increased from 0 to 1.0 wt%, the total thickness of the oxide films decreased by ∼27 %, which is primarily attributed to that SiO2 promoted the nucleation of Fe-Cr spinel and enhanced the densification and adhesion of the oxide films. In addition, δ-ferrite precipitated in 0.7Si9Cr and 1.0Si9Cr F/M steels improved its corrosion resistance by forming dense Cr-rich oxide films on δ-ferrite owing to its higher Cr content and lower defect density. The effect mechanism of Si on microstructure and corrosion behavior of XSi9Cr F/M steel is also discussed. © 2025 Elsevier Ltd

关键词： Oxide films

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LightGBM-Based Prediction of Remaining Useful Life for Electric Vehicle Battery under Driving Conditions

LightGBM-Based Prediction of Remaining Useful Life for Elect...

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2020 IEEE Sustainable Power and Energy Conference, iSPEC 2020

作者： Liu, Huiqiao Xiao, Qian Jiao, Zhipeng Meng, Jinhao Mu, Yunfei Hou, Kai Yu, Xiaodan Guo, Shiqi Jia, Hongjie Zhonghuan Information College Tianjin University of Technology Department of Automation Engineering Tianjin China Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin China State Key Laboratory of Reliability and Intelligence of Electrical Equipment Hebei University of Technology Tianjin China College of Electrical Engineering Sichuan University Chengdu China State Grid Tianjin Binhai Electric Power Supply Company Tianjin China

ISBN: (纸本)9781728191645

Remaining useful life (RUL) prediction for electric vehicle battery (EV battery) is of great significance for the early replacement and regular maintenance of batteries with potential safety hazards in driving conditions. This paper proposes a novel method based on light gradient boosting machine (LightGBM) to predict the RUL of the battery under driving conditions. LightGBM uses the histogram optimization strategy to reduce the number of traversal of the data sample set and improve the robustness of the method;the depth-first splitting (leaf-wise) strategy reduces the risk of overfitting;the gradient-based one-sided sampling strategy (GOSS), reduce the data dimension;use the exclusive feature bundling strategy (EFB) to reduce the feature dimension. However, the LightGBM method has the difficulty of parameter setting. Therefore, this paper uses Hyperopt based on distributed asynchronous algorithm configuration/hyperparameter optimization to optimize its complicated hyperparameters. Subsequently, the method was applied to the prediction of battery RUL under simulated driving conditions. Based on the comparative cases, the results show that this method can guarantee the rapidity, accuracy and robustness of RUL prediction under the condition of low memory usage. © 2020 IEEE.

关键词： Forecasting

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Large Port Energy Management Based on Distributed Optimization

Large Port Energy Management Based on Distributed Optimizati...

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International Conference on Informative and Cybernetics for Computational Social Systems (ICCSS)

作者： Qiongyue Zhang Qihe Shan Tieshan Li Navigation College Dalian Maritime University Dalian China College of Automation Engineering University of Electronic Science and Technology Chengdu China

ISBN: (数字)9781728162461

ISBN: (纸本)9781665419352

With the development of marine transport and expansion of the port scale, the port has become the energy intensive area and may evoke the pollution of surrounding environment. This paper studies the large port energy systems including integrated renewable energy, energy storage devices, plugged-in electric vehicles and shore to ship power supply. Based on the knowledge of multi-agent systems and distributed optimization, an innovation energy management solution for large ports is proposed, which considers energy entities with different energy forms. This method can not only ensure the balance of supply and demand(including power, heat and gas), but also optimize the energy allocation of ports and improve the energy utilization efficiency. Finally, simulation results illustrate the effectiveness of the proposed large port energy management solution based on distributed optimization with multi-agent systems.

关键词： Heating systems Technological innovation Simulation Resource management Energy management Optimization Multi-agent systems

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The solution space of a five-dimensional geometry: Kundt spacetimes and cosmological time-crystals

arXiv

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arXiv 2024年

作者： Shababi, Homa Grammenos, Theophanes Dimakis, Nikolaos Paliathanasis, Andronikos Christodoulakis, Theodosios Center for Theoretical Physics College of Physics Sichuan University Chengdu610065 China Department of Civil Engineering University of Thessaly Volos38334 Greece Departamento de Ciencias Físicas Universidad de la Frontera Casilla 54-D Temuco4811186 Chile Institute of Systems Science Durban University of Technology Durban4000 South Africa Departamento de Matemáticas Universidad Católica del Norte Avda. Angamos 0610 Casilla Antofagasta1280 Chile Nuclear and Particle Physics section Physics Department University of Athens Athens15771 Greece

We uncover the solution space of a five dimensional geometry which we deem it as the direct counterpart of the Bianchi Type V cosmological model. We kinematically reduce the scale factor matrix and then, with an appropriate scaling and choice of time, we cast the spatial equations into a simple "Kasner" like form;thus revealing linear integrals of motion. Their number is enough so that, along with the quadratic constraint, it suffices to scan the entire space of solutions. The latter is revealed to be quite rich, containing cosmological solutions, some of which admit dimensional reduction asymptotically to four dimensions, Kundt spacetimes with vanishing type I (polynomial) curvature scalars and solutions describing periodic universes which behave like cosmological time crystals. Copyright © 2024, The Authors. All rights reserved.

关键词： Cosmology

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The Solution Space of a Five-Dimensional Geometry: Kundt Spacetimes and Cosmological Time-Crystals

SSRN

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SSRN 2024年

关键词： Crystals

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Reconstruction of Cherenkov image bymultiple telescopes of LHAASO-WFCTA

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Radiation Detection technology and Methods 2022年第4期6卷 544-557页

作者： F.Aharonian Q.An Axikegu L.X.Bai Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi J.T.Cai Zhe Cao Zhen Cao J.Chang J.F.Chang E.S.Chen Liang Chen Liang Chen Long Chen M.J.Chen M.L.Chen Q.H.Chen S.H.Chen S.Z.Chen T.L.Chen Y.Chen H.L.Cheng N.Cheng Y.D.Cheng S.W.Cui X.H.Cui Y.D.Cui B.D’Ettorre Piazzoli B.Z.Dai H.L.Dai Z.G.Dai Danzengluobu Ddella Volpe K.K.Duan J.H.Fan Y.Z.Fan Z.X.Fan J.Fang K.Fang C.F.Feng L.Feng S.H.Feng X.T.Feng Y.L.Feng B.Gao C.D.Gao L.Q.Gao Q.Gao W.Gao W.K.Gao M.M.Ge L.S.Geng G.H.Gong Q.B.Gou M.H.Gu F.L.Guo J.G.Guo X.L.Guo Y.Q.Guo Y.Y.Guo Y.A.Han H.H.He H.N.He S.L.He X.B.He Y.He M.Heller Y.K.Hor C.Hou X.Hou H.B.Hu Q.Hu S.Hu S.C.Hu X.J.Hu D.H.Huang W.H.Huang X.T.Huang X.Y.Huang Y.Huang Z.C.Huang X.L.Ji H.Y.Jia K.Jia K.Jiang Z.J.Jiang M.Jin M.M.Kang T.Ke D.Kuleshov K.Levochkin B.B.Li Cheng Li Cong Li F.Li H.B.Li H.C.Li H.Y.Li J.Li Jian Li Jie Li K.Li WLLi XRLi Xin Li Xin Li YZLi Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.J.Lin B.Liu C.Liu D.Liu H.Liu H.D.Liu J.Liu J.L.Liu J.S.Liu J.Y.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu W.J.Long R.Lu Q.Luo H.K.Lv B.Q.Ma L.L.Ma X.H.Ma J.R.Mao A.Masood Z.Min W.Mitthumsiri Y.C.Nan Z.W.Ou B.Y.Pang P.Pattarakijwanich Z.Y.Pei M.Y.Qi Y.Q.Qi B.Q.Qiao J.J.Qin D.Ruffolo A.Sáiz C.Y.Shao L.Shao O.Shchegolev X.D.Sheng J.Y.Shi H.C.Song Yu.V.Stenkin V.Stepanov Y.Su Q.N.Sun X.N.Sun Z.B.Sun P.H.T.Tam Z.B.Tang W.W.Tian B.D.Wang C.Wang H.Wang H.G.Wang J.C.Wang J.S.Wang L.P.Wang L.Y.Wang R.Wang R.N.Wang W.Wang X.G.Wang X.Y.Wang Y.Wang Y.D.Wang Y.J.Wang Y.P.Wang Z.H.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu H.R.Wu S.Wu X.F.Wu Y.S.Wu S.Q.Xi J.Xia J.J.Xia G.M.Xiang D.X.Xiao G.Xiao G.G.Xin Y.L.Xin Y.Xing Z.Xiong D.L.Xu R.X.Xu L.Xue D.H.Yan J.Z.Yan C.W.Yang F.F.Yang H.W.Yang J.Y.Yang L.L.Yang M.J.Yang R.Z.Yang S.B.Yang Y.H.Yao Z.G.Yao Y.M.Ye L.Q.Yin N.Yin X.H.You Z.Y.You Y.H.Yu Q.Yuan H.Yue H.D.Zeng T.X.Zeng W.Zeng Z.K.Zeng M.Zha X.X.Zhai B.B.Zhang F.Zhang H.M.Zhang H.Y.Zhang J.L.Zhang L.X.Zhang Li Zhang Lu Zhang P.F.Zhang P.P.Zhang R.Zhang S.B.Zhang S.R.Zhang S. Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduSichuanChina Dublin Institute for Advanced Studies 31 Fitzwilliam Place2DublinIreland Max-Planck-Institut for Nuclear Physics P.O.Box 10398069029 HeidelbergGermany State Key Laboratory of Particle Detection and Electronics BeijingChina University of Science and Technology of China Hefei 230026AnhuiChina School of Physical Science and Technology&School of Information Science and Technology Southwest Jiaotong UniversityChengdu 610031SichuanChina College of Physics Sichuan UniversityChengdu 610065SichuanChina School of Astronomy and Space Science Nanjing UniversityNanjing 210023JiangsuChina Center for Astrophysics Guangzhou UniversityGuangzhou 510006GuangdongChina Key Laboratory of Dark Matter and Space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023JiangsuChina Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000TibetChina National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China Hebei Normal University Shijiazhuang 050024HebeiChina School of Physics and Astronomy(Zhuhai)&Sino-French Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000China School of Physics(Guangzhou) Sun Yat-sen UniversityGuangzhou 510275GuangdongChina Dipartimento di Fisica dell’Universitàdi Napoli“Federico II” Complesso Universitario di Monte Sant’Angelovia Cinthia80126 NapoliItaly School of Physics and Astronomy Yunnan UniversityKunming 650091YunnanChina Département de Physique Nucléaire et Corpusculaire Facultéde SciencesUniversitéde Genève

Introduction One of main scientiﬁc goals of the Large High Altitude Air Shower Observatory(LHAASO)is to accurately measure the energy spectra of different cosmic ray compositions around the‘knee’*** Wide Field-of-View(FoV)Cherenkov Telescope Array(WFCTA),which is one of the main detectors of LHAASO and has 18 telescopes,is built to achieve this *** telescopes are put together and point to connected directions for a larger *** Telescopes are deployed spatially as close as possible,but due to their own size,the distance between two adjacent telescopes is about 10 ***,the Cherenkov lateral distribution and the parallax between the two telescopes should be considered in the event building process for images crossing over the boundaries of FoVs of the *** event building method for Cherenkov images measured by multiple telescopes of WFCTA is *** performance of the shower measurements using the combined images is evaluated by comparing with showers that are fully contained by a virtual telescope in *** and conclusion It is proved that the developed event building process can help to increase the FoV of WFCTA by 30%while maintaining the same reconstruction quality,compared to the separate telescope reconstruction method.

关键词： method directions conclusion

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X_1(2900) as a D_1 K molecule

arXiv

引用

arXiv 2021年

作者： Chen, Hao Qi, Hong-Rong Zheng, Han-Qing Department of Physics State Key Laboratory of Nuclear Physics and Technology Peking University Beijing100871 China Department of Engineering Physics Tsinghua University Beijing100084 China College of Physics Sichuan University Sichuan Chengdu610065 China

The analyses of the LHCb data on X(2900) in the D−K+ spectrum are performed. Both dynamically generated and explicitly introduced X1(2900) are considered. The results show that both these two approaches support the interpretation of X1(2900) as a D¯1K molecular state, with JP = 1− and an iso-singlet interpretation is much more favorable. The effect of triangle singularity on the production of X1(2900) is also discussed, and it is found that it cannot be interpreted as a pure triangle cusp. © 2021, CC BY.

关键词： Hadrons

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