检索结果-内蒙古大学图书馆

Effects of flaky rare earth oxide additives on the high temperature performance of nickel electrodes

Journal of Rare Earths 2010年第1期28卷 72-78页

作者：方庆成艳简旭宇朱磊蔚海军王忠蒋利军 Energy Materials and Technology Research Institute General Research Institute for Non-Ferrous Metals Center for Biomedical Materials and Tissue Engineering Academy for Advanced Interdisciplinary StudiesPeking University

Effects of flaky rare earth oxide additives including Er2O3,Tm2O3,and Yb2O3,Lu2O3 on high temperature and high rate discharge performance of nickel electrodes were *** discharge efficiency at 0.2C reached 96% at 60 oC for electrodes with 1 at.% flaky rare earth *** high rate discharge performance for electrodes with flaky rare earth oxides were improved significantly,for example,discharge efficiency at 5C improved from 50% to 70%.The results showed that the end charging potential of the ...

关键词： flaky rare earth oxides high temperature performance cyclic voltammograms nickel electrodes nickel-metal hydride batteries rare earths

来源：评论

学校读者我要写书评

暂无评论

Cosmic Ray Composition Measurement between 3 PeV to 30 PeV with the TALE Hybrid Detector 7

Cosmic Ray Composition Measurement between 3 PeV to 30 PeV w...

引用

7th International Symposium on Ultra-High-Energy Cosmic Rays, UHECR 2024

作者： Fujita, Keitaro Abbasi, R.U. Abu-Zayyad, T. Allen, M. Belz, J.W. Bergman, D.R. Buckland, I. Campbell, W. Cheon, B.G. Endo, K. Fedynitch, A. Fujii, T. Fujisue, K. Fujita, K. Fukushima, M. Furlich, G. Gerber, Z. Hanlon, W. Hayashida, N. Hibino, K. Higuchi, R. Ikeda, D. Ishii, T. Ivanov, D. Jeong, S. Jui, C.C.H. Kadota, K. Kakimoto, F. Kalashev, O. Kasahara, K. Kawachi, Y. Kawata, K. Kharuk, I. Kido, E. Kim, H.B. Kim, J.H. Kobo, R. Komae, I. Komatsu, K. Komori, K. Koyama, C. Kudenko, M. Kuroiwa, M. Kusumori, Y. Kuznetsov, M. Kwon, Y.J. Lee, K.H. Lee, M.J. Lubsandorzhiev, B. Lundquist, J.P. Matsuzawa, A. Matthews, J.A. Matthews, J.N. Mizuno, K. Mori, M. Murakami, M. Nagataki, S. Nakahara, M. Nakamura, T. Nakayama, T. Nakayama, Y. Nonaka, T. Ogio, S. Ohoka, H. Okazaki, N. Onishi, M. Oshima, A. Oshima, H. Ozawa, S. Park, I.H. Park, K.Y. Potts, M. Przybylak, M. Pshirkov, M.S. Rott, C. Rubtsov, G.I. Ryu, D. Sagawa, H. Sakaki, N. Sakamoto, R. Sako, T. Sakurai, N. Sakurai, S. Sato, D. Sato, S. Sekino, K. Shibata, T. Shikita, J. Shimodaira, H. Shin, B.K. Shin, H.S. Shinozaki, K. Smith, J.D. Sokolsky, P. Stokes, B.T. Stroman, T.A. Takagi, Y. Takahashi, K. Takeda, M. Takeishi, R. Taketa, A. Takita, M. Tameda, Y. Tanaka, K. Tanaka, M. Thomas, S.B. Thomson, G.B. Tinyakov, P. Tkachev, I. Tomida, T. Troitsky, S. Tsunesada, Y. Udo, S. Urban, F. Vaiman, I.A. Vrabel, M. Warren, D. Yamazaki, K. Zhezher, Y. Zundel, Z. Zvirzdin, J. Institute for Cosmic Ray Research University of Tokyo 5-1-5 Kashiwa-no-Ha Chiba Kashiwa Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States High Energy Astrophysics Institute Department of Physics and Astronomy University of Utah Salt Lake CityUT84112-0830 United States Department of Physics The Research Institute of Natural Science Hanyang University Seongdong-gu Seoul426-791 Korea Republic of Graduate School of Science Osaka Metropolitan University Sugimoto Sumiyoshi Osaka558-8585 Japan Institute for Cosmic Ray Research University of Tokyo Chiba Kashiwa277-8582 Japan Institute of Physics Academia Sinica Taipei City115201 Taiwan Nambu Yoichiro Institute of Theoretical and Experimental Physics Osaka Metropolitan University Sugimoto Sumiyoshi Osaka558-8585 Japan Astrophysical Big Bang Laboratory RIKEN Saitama Wako351-0198 Japan Faculty of Engineering Kanagawa University Kanagawa Yokohama221-8686 Japan Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi Yamanashi Kofu400-8511 Japan Department of Physics Sungkyunkwan University Jang-an-gu Suwon16419 Korea Republic of Department of Physics Tokyo City University Setagaya-ku Tokyo158-8557 Japan Institute for Nuclear Research Russian Academy of Sciences Moscow117312 Russia Faculty of Systems Engineering and Science Shibaura Institute of Technology Minato-ku Tokyo337-8570 Japan Academic Assembly School of Science and Technology Institute of Engineering Shinshu University Nagano Nagano380-8554 Japan Graduate School of Engineering Osaka Electro-Communication University Neyagawa-shi Osaka572-8530 Japan Service de Physique Theorique Universite Libre de Bruxelles Brussels1050 Belgium Department of Physics Yonsei University Seodaemun-gu Seoul120-749 Korea Republic of Center for Astrophysics and Cosmology University of Nova Gorica Nova Gorica5297 Slovenia Faculty of Science Kochi University Kochi Kochi780-85

We report on the cosmic ray mass composition measured by the Telescope Array Low-energy Extension (TALE) hybrid detector. The TALE detector began operations in 2017 with 10 high-elevation fluorescence telescopes and a surface detector (SD) array of 80 scintillation counters, including 40 with 400 m spacing and 40 with 600 m spacing. In 2023, we constructed a new array made up of 50 SDs with a spacing of 100 m to lower the energy threshold of hybrid mode down to PeV range for the investigation of the cosmic ray mass composition around knee structure in the spectrum. Here we will present an estimate of the performance of the hybrid mode which is a combination of the new SD array and TALE-FD using a Monte Carlo simulation, and report the first preliminary results of the mass composition measurement using the new hybrid detector. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0) All rights for text and data mining, AI training, and similar technologies for commercial purposes, are reserved.

关键词： Cosmic ray measurement

来源：评论

学校读者我要写书评

暂无评论

All-fiber vector bending sensor based on a hole-assisted fiber

引用

IEEE Sensors Journal 2025年

作者： Chen, Yao Ling, Qiang Wang, Lingyu Ding, Yunlian Luo, Si Zhang, Yusheng Chen, Haiyun Yu, Zhangwei Li, Chuankang Guan, Zuguang Chen, Daru Zhejiang Normal University Hangzhou Institute of Advanced Studies Hangzhou 311231 China Zhejiang Normal University Key Laboratory of Optical Information Detection and Display Technology of Zhejiang Jinhua 321004 China China University of Geosciences School of Mechanical Engineering and Electronic Information Wuhan 430074 China Futong Group Co. Ltd Fuyang Hangzhou 311499 China Zhejiang University of Technology College of Science Hangzhou 310023 China

In this paper, a novel hole-assisted fiber (HAF) composite structure-based optical fiber sensor for directional bending detection is proposed. The sensor is fabricated by splicing multimode fiber (MMF) to HAF, creating a hybrid structure capable of vectorial bending through its unique air-hole and multi-core assisted architecture. The distinctive cladding geometry of HAF enables precise determination of bending direction through differential sensitivity patterns. Experimental characterization across four orthogonal bending orientations revealed three directions with comparable negative sensitivities (-5.493 nm/m^-1, -7.153 nm/m^-1, and -5.284 nm/m^-1 respectively). Significantly, when bending occurred with air holes positioned on the inner curvature, the sensor exhibited a distinct positive sensitivity of 1.095 nm/m-¹. Temperature testing demonstrated stable performance with the sensitivity of 9.2 pm/°C across 25-65°C. The combination of these features suggests strong potential for practical applications in high-precision directional bending sensing systems requiring both magnitude and orientation detection. © 2001-2012 IEEE.

关键词： Hole-assisted fiber Mach-Zehnder interference Optical fiber sensor Vector bending

来源：评论

学校读者我要写书评

暂无评论

Security on mobile cloud computing using cipher text policy and attribute based encryption scheme

引用

Materials Today: Proceedings 2023年 80卷 3059-3063页

作者： Swetha, Madireddy Latha, M. Department Of Computer Science & Engineering Vels Institute of Science Technology and Advanced Studies Tamil Nadu India Vels Institute of Science Technology & Advance Studies Tamil Nadu India

Mobile Cloud Computing (MCC) is a new paradigm that has been emerged by the advances in the Cloud Computing for Mobile devices to access Cloud services. The data security challenges against the data thefting, deleting, corrupting, or exploiting are existed as the data storage and access to/from the cloud has been most popular. In order to handle these data security issues in the cloud and to provide protection for the data, some innovative encryption methods have been developed. One of such encryption methods is Attribute-Based Encryption (ABE) that has a more control on the data in cloud as which is accessed by whom. Since from the recent years, many of academic researchers have paying a widespread of attention on using advanced cryptographic techniques to securely store, process, also share data over the untrusted cloud environment. One of the promising cryptographic techniques which can solve the open challenge of regulating the fine-grained access control of important data over the distributed cloud is the Cipher text Policy – Attribute Based Encryption (CP-ABE). Therefore, a survey of work is presented in this paper on different CP-ABE methods for the secure mobile cloud computing architecture. This paper presents some works that are focused on secure data storing, accessing and sharing using CP-ABE methods over the untrusted cloud environments. All the works that are studied are analyzed and compared with each other in the results to find the best out of it. © 2021

关键词： Mobile cloud computing

来源：评论

学校读者我要写书评

暂无评论

PERFORMANCE ANALYSIS OF A SOLAR-ARRAY UNDER SHADOW CONDITION

引用

IEE PROCEEDINGS-G CIRCUITS DEVICES AND SYSTEMS 1991年第3期138卷 301-306页

作者： SHARMA, AK DWIVEDI, R SRIVASTAVA, SK Centre of Advanced Studies Department of Electronics Engineering Institute of Technology Banaras Hindu University Varanasi Uttar Pradesh 221 005 India

The investigation deals with performance studies of a solar array consisting of two modules, each having 25 cells in series. The load characteristics of the array are studied experimentally and it is observed that, as the shadowed area increases, the overall performance of the array is significantly degraded. Theoretical analysis of such an array has also been carried out to explore the possible mechanisms responsible for array degradation. In the analysis, we consider an additional series resistance for the dark region, whereas earlier workers have overestimated the contribution of the dark region because they have always taken into account identical series resistances for the illuminated, as well as the dark, region. Simulation of the enhanced series resistance of the dark region in the present work has been done by the effective surface resistance of the emitter layer caused by a metallic grid, because of the biasing of the dark region by the illuminated area. Under such biasing, the dark region acts as a load on the illuminated region and causes a loss of current. This is simulated by an additional series resistance (R(surf)). The analysis, which is based on consideration of the enhanced series resistance of the dark region, produces a better match between experimental and theoretical results.

关键词： SOLAR CELLS

来源：评论

学校读者我要写书评

暂无评论

Heart Disease Prediction using Logistic Regression with PCA-MFSA Feature Extraction Technique and Multidimensional Scaling (MDS) Pre-processing Approach 3rd

Heart Disease Prediction using Logistic Regression with PCA-...

引用

3rd International Conference on Advancements in Smart Computing and Information Security, ASCIS 2024

作者： Priscila, S. Silvia Sakthivanitha, M. Sadhana, C. Lavanya, M. Poornima, V. Department of Computer Science Bharath Institute of Higher Education and Research Tamil Nadu Chennai India Department of Information Technology Vels Institute of Science Technology and Advanced Studies Tamil Nadu Chennai India Department of MCA Prathyusha Engineering College Tamil Nadu Chennai India Department of Computer Applications S.D.N.B Vaishnav College for Women Tamil Nadu Chennai India Department of Computer Science Vels Isntitute of Science Technology and Advanced Studies Tamil Nadu Chennai India

ISBN: (纸本)9783031862922

Heart disease prediction is critical because it has the potential to save lives, increase patient outcomes, and save the cost of healthcare. An important task in medical diagnostics is the forecasting of heart disease. In this article, we investigate the efficacy of integrating Multidimensional Scaling (MDS) preprocessing with various feature extraction methods for precise LR (Logistic Regression) heart disease prediction. The feature extraction methods under investigation include Independent Component Analysis (ICA), Principal Component Analysis (PCA) and Mean Fisher Score-based Algorithm (PCA-MFSA). PCA with MFSA emerges as the most effective method, consistently producing superior outcomes in the forms of accuracy rate, precision, and recall value compared to ICA and PCA. This underscores the significance of combining PCA with the specialized feature selection process offered by PCA-MFSA to enhance the LR model’s discriminatory power. Moreover, The incorporation of MDS preprocessing with PCA-MFSA results in a significant improvement in accuracy rate, precision value, and recall. From the result obtained PCA-MFSA produces accuracy of 91%, precision of 0.90 and recall of 0.86 respectively. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Logistic regression

来源：评论

学校读者我要写书评

暂无评论

General radical difluoromethylation using difluoroacetic anhydride via photoredox catalysis

引用

Science China Chemistry 2024年第8期67卷 2637-2646页

作者： Meng He Yankai Yang Heng Zhang Zhipeng Guan Zhi-Bing Dong Hong Yi Aiwen Lei School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan 430205China College of Chemistry and Molecular Sciences and Institute for Advanced Studies(IAS) Wuhan UniversityWuhan 430072China

CF_(2)H-containing molecules play pivotal roles in diverse fields from medicinal chemistry to materials science. However, the application of existing CF_(2)H reagents as a source of CF_(2)H radical is limited by their reactivity and preparation. Herein, we develop a simple and general visible-light-catalyzed radical difluoromethylation reaction of alkenes, dienes, and heteroaromatics using commercially available, easy-to-handle, and low-cost difluoroacetic anhydride as the CF_(2)H reagent. This scalable protocol enables the convenient synthesis of a range of CF_(2)H-containing compounds under mild conditions, exhibiting a broad substrate scope and functional group tolerance. Potential applications are further demonstrated by gram-scale synthesis, sunlight experiments, derivatization experiments as well as the synthesis of bioactive molecules.

关键词： radical difluoromethylation alkenes/dienes/heteroaromatics difluoroacetic anhydride photoredox

来源：评论

学校读者我要写书评

暂无评论

Performance investigation on novel MPPT controller in solar photovoltaic system

引用

Materials Today: Proceedings 2023年 80卷 3517-3522页

作者： Bhukya, Ramu Shanmugasundaram, N. Department of Electrical and Electronics Engineering VELS Institute of Science Technology and Advanced Studies Pallavaram Chennai600 117 India

This paper investigates the performance of solar PV system by implementing MPPT algorithm. The IV and PV characteristics of solar photovoltaic system have been analyzed for various parameters of temperature and irradiation. From the characteristics, the peak power variations with respect to physical parameters have been identified using algorithmic approach. To validate the MPPT operation, the P&O algorithm has been implemented and verified the operation under varying environmental conditions. And also, the same has been compared with theoretical approach in this paper. © 2021

关键词： Solar concentrators

来源：评论

学校读者我要写书评

暂无评论

Loss-Enabled Chirality Inversion in Terahertz Metasurfaces

引用

Physical Review Letters 2025年第10期134卷 106901-106901页

作者： Weibao He Shun Wan Yunlan Zuo Siyang Hu Ziheng Ren Zhongyi Yu Dongsheng Yang Xiang’ai Cheng Keyu Xia College of Advanced Interdisciplinary Studies National University of Defense Technology Changsha 410073 People’s Republic of China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha 410081 People’s Republic of China School of Physics and Chemistry Hunan First Normal University Changsha 410205 People’s Republic of China Institute for Quantum Science and Technology College of Science National University of Defense Technology Changsha 410073 People’s Republic of China College of Engineering and Applied Sciences Nanjing University Nanjing 210023 People’s Republic of China Shishan Laboratory Suzhou Campus of Nanjing University Suzhou 215000 People’s Republic of China

Exceptional points (EPs), known as non-Hermitian degeneracies featuring missing eigenspace dimensions, have led to a variety of intriguing wave phenomena in various physical platforms. Chiral EPs collapsing in two orthogonal eigenstates can lead to unique effects and applications, such as loss-induced transparency, EP-enhanced sensing, and chirality-reversal electronics, etc. However, in previous experiments, chiral EPs were typically induced in fixed structures with inherent active gains or nearby nanotips, which are unfavorable for on-chip integrations with low-power elements. Here, we demonstrate the active control of EPs chirality in situ with exceptional-line metasurface. Selective chirality inversion can be well achieved by only light-induced loss without altering the metasurface size. We also perform an ultrafast chirality switch in the picosecond level within transient disturbance. In a broader view, our results provide a platform for the investigation of metasurface-based non-Hermitian physics and active EP modulation, which can stimulate exciting works along this line in near future.

关键词： Nanotips

来源：评论

学校读者我要写书评

暂无评论

An Effective Identification of Microaneurysm in Retinal Eye Using ConvNet with Adam Optimizer 5

An Effective Identification of Microaneurysm in Retinal Eye ...

引用

5th International Conference on Computer, Communication, and Signal Processing, ICCCSP 2021

作者： Kumudham, R. Bharathi, G. Dhivya Priya, R.Divya Vels Institute of Science Technology Advanced Studies School of Engineering

ISBN: (纸本)9781665432771

This research work outlines a framework to diagnose the Diabetic Retinopathy (DR) from colour fundus images by applying deep learning techniques. ConvNet with Adam Optimization approach is applied for early identification of Microaneurysm occurring in retina of the eye and also for classifying its severity accurately. The data augmentation attribute of ConvNet with Adam Optimiser helps to overcome the complications involved in the categorization task such as non microaneurysm and microaneurysm in human eye. The ConvNet with Adam optimization helps to achieve high accuracy rate, by reducing false positive rate and is demonstrated with the help of high end graphics processor with available kaggle datasets, for a high level classification. © 2021 IEEE.

关键词： Graphics processing unit

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：