检索结果-内蒙古大学图书馆

IoT-based Efficient Waste Management on University Campus : Enhancing Monitoring and Optimization through Machine Learning

引用

Procedia Computer science 2025年 258卷 4157-4168页

作者： Sumathi M. Hanumanthappa J. K.S. Santhosh Kumar S.P. Shiva Prakash Meghana J. Department of Studies in Computer Science Manasagangothri Campus University of Mysore Mysuru Karnataka 570006 India Department of Artificial Intelligence and Machine Learning Mysore University School of Engineering Manasagangothri Campus University of Mysore Mysuru Karnataka 570006 India Department of Information Science and Engineering & Computer Science and Business Systems JSS Science and Technology University Mysuru Karnataka 570006 India Department of Computer Science Mahajana Post Graduate Center Mysuru Karnataka 570016 India

The introduction of an IoT-based smart waste management system is proposed to optimize various aspects of university campus waste recycle management processes, such as garbage collection scheduling, waste type identification, and collection routes. This system utilizes advanced data analytics algorithms, wireless communication protocols, and sensors to measure and document variations in trash levels, enabling real-time monitoring of waste accumulation. Through this IoT-based infrastructure, university administrators and waste management staff gain fine-grained visibility and control over garbage collection processes. The implications for sustainability advocacy and environmental stewardship in academic environments are significant. By fostering a culture of environmental awareness and accountability, universities can instill ideals of conservation and resourcefulness in their student populations and staff. The proposed IoT-enabled waste bin system exemplifies the synergy between technological innovation and environmental responsibility, serving as a model for institutions worldwide. Collaboration among universities can leverage IoT technology to drive positive change, mitigate environmental degradation, and promote sustainable practices beyond campus boundaries. Efficient waste management is crucial for nurturing sustainability on college and university campuses, as evidenced by the urgent need for the collection and recycling of compost, general waste, and recyclables. Our models consistently achieve high performance, with perfect scores (1.000) across all split ratios, indicating flawless classification of waste types. Although the Artificial Neural Network (ANN) demonstrates slightly lower accuracy, ranging from 0.973 to 0.997 depending on data splits, it still performs well. As a result, Naive Bayes produces less accurate results, typically surpassing 0.93 but falling short of Random Forest, K-Nearest Neighbors (KNN), and Support Vector Machine (SVM)’s flawless

关键词： Artificial Intelligence Smart Parking: Smart city Machine Learning Smart Applications

来源：评论

学校读者我要写书评

暂无评论

Interfacially-localized high-concentration electrolytes for high-performance rechargeable aqueous lithium-ion batteries

EES Batteries

引用

EES Batteries 2025年第2期1卷 273-286页

作者： Guohong Shen Shinji Kondou Gakuto Wada Hiroki Nakagaki Masayoshi Watanabe Kaoru Dokko Kazuhide Ueno Department of Chemistry and Life Science Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan Department of Materials Engineering Science Graduate School of Engineering Science Osaka University 1-3 Machikaneyama Toyonaka Osaka 560-8531 Japan Institute of Advanced Sciences Yokohama National University 79-5 Tokiwadai Hodogaya-ku Yokohama 240-8501 Japan

Highly concentrated electrolytes have attracted significant attention because of their ability to enhance electrochemical stability and facilitate the formation of solid electrolyte interphases (SEIs). In particular, the electrolyte materials used in aqueous Li-ion batteries can benefit greatly from these high-concentration effects owing to the poor electrochemical stability of water. Therefore, highly concentrated aqueous electrolytes have recently been employed to achieve wider electrochemical stability windows. However, such high concentrations lead to increased electrolyte viscosity, reduced ionic conductivity, higher costs, and decreased energy density. In addition, employing diluents to create localized high-concentration electrolytes in aqueous systems is challenging, unlike in non-aqueous systems. In this study, we developed novel “interfacially-localized high-concentration electrolytes” using a fluorinated anionic surfactant, lithium nonafluoro-1-butanesulfonate (LiNFBS) (2.13 M), in conjunction with a divalent salt, magnesium(II) bis(trifluoromethanesulfonyl)imide (Mg(TFSI)₂) (0.74 M). Using this electrolyte, we achieved a wide electrochemical stability window (ESW) of 3.3 V, a high Li⁺ transference number, elevated ionic conductivity (34.0 mS cm⁻¹), low viscosity (19.2 mPa s), excellent interfacial wettability, and superior SEI formation. Based on the remarkable performance of this electrolyte, lithium titanium phosphate (LTP)/lithium manganate (LMO) full cells demonstrated high-rate capability at 40 C and were maintained for over 750 stable cycles at a current density of 5 C. Thus, this design concept may provide new avenues for the development of next-generation high-performance aqueous electrolytes.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Nonlinear time series computing using a linear optical microcavity

引用

Optics Express 2025年第12期33卷 24982-24994页

作者： Mengyu You Kohei Arai Satoshi Sunada Department of Applied Physics School of Advanced Science and Engineering Waseda University 3-4-1 Okubo Shinjuku-ku Tokyo 169-8555 Japan mengyuyou@akane.waseda.jp Graduate School of Natural Science and Technology Kanazawa University Kakuma-machi Kanazawa Ishikawa 920-1192 Japan Faculty of Mechanical Engineering Institute of Science and Engineering Kanazawa University Kanazawa Ishikawa 920-1192 Japan sunada@se.kanazawa-u.ac.jp

Photonic systems excel at performing linear computations, such as matrix-vector multiplications, in a highly parallel and energy-efficient manner. However, implementing nonlinear computations in photonic systems remains challenging without relying on optoelectronic conversions or nonlinear/active materials, both of which are energy-intensive. Here, we present a nonlinear computing approach for time series processing. This approach enables energy-efficient and nonlinear computations of large-scale optical networks within a single linear (passive) microcavity by leveraging the interplay between cavity modes and an optical phase-encoded input signal and facilitates an on-chip implementation on a silicon photonic platform. We experimentally demonstrate higher-order nonlinear computational capacity using a silicon photonic microcavity, achieving superior performance in time-dependent processing tasks, such as chaotic time-series prediction and nonlinear observer tasks.

关键词： Integrated photonics Integrating spheres Optical networks Phase modulation Spatial light modulators Vertical cavity surface emitting lasers

来源：评论

学校读者我要写书评

暂无评论

Decentralised Iterative Learning control for High Performance Collaborative Tracking Problem with Output Constraints

Decentralised Iterative Learning Control for High Performanc...

引用

UKACC International Conference on control (control)

作者： Bin Chen Bing Chu Department of Automatic Control and Systems Engineering University of Sheffield Sheffield U.K. School of Electronics and Computer Science University of Southampton Southampton U.K.

ISBN: (数字)9798350374261

ISBN: (纸本)9798350374278

High performance collaborative tracking problem, requiring a group of independent subsystems to generate a global output that can precisely track the desired reference in a repetitive manner, has found lots of applications in practice. However, for such an important control task, existing iterative learning control (ILC) methods have not considered the constraint on each subsystem's output, which leads to potential risk within the control process. This paper proposes a novel optimisation based ILC method to address the high performance collaborative tracking problem with output constraints. The proposed ILC framework can guarantee not only each subsystem's output constraint is always satisfied during the control process, but also the monotonic convergence of a well-defined performance index to a possibly minimum value. To avoid huge computational complexity for large scale systems, we further apply the idea of the alternative direction method of multipliers (ADMM) to implement the proposed ILC frame-work in a decentralised manner, which allows the resulting decentralised methods to be applied to large scale and changing systems. Moreover, the decentralised ILC method proposed in this paper is suitable for non-minimum phase, heterogeneous and/or homogeneous systems, which is appealing in practice. Convergence properties of the proposed ILC algorithms are analysed rigorously, and numerical examples are given to demonstrate the algorithms' effectiveness.

关键词： Collaboration Process control Performance analysis Large-scale systems Task analysis Computational complexity Optimization

来源：评论

学校读者我要写书评

暂无评论

Suppression of Receiver Harmonic Currents in Wireless Power Transfer systems

Suppression of Receiver Harmonic Currents in Wireless Power ...

引用

Wireless Power Week (WPW)

作者： Daisuke Kobuchi Gregory E. Moore Yoshiaki Narusue Joshua R. Smith Department of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo Tokyo Japan Department of Electrical and Computer Engineering University of Washington Seattle USA Department of Electrical and Computer Engineering Paul G. Allen School of Computer Science and Engineering University of Washington Seattle USA

Harmonic currents in a receiver in wireless power transfer (WPT) systems can degrade performance of the receiver device by corrupting the DC power plane. The DC plane at the receiver serves as a constant reference that allows for dependent, sensitive electronics to operate with acceptable precision. However, if that reference is corrupted by noise, then the functions of the system, such as sensing and wireless communication, can degrade significantly. To reduce the harmonic current content in the receiver, and thereby improve the DC supply constancy, the optimal arbitrary voltage transmitter excitation is derived. To physically generate the derived arbitrary voltage, the signal is converted to a multilevel voltage using a phase-shifted carrier modulation. This multilevel voltage is then realized via the design of a full-bridge flying capacitor multilevel inverter and circuit simulations demonstrated the reduction of the harmonic currents in the receiver. By comparison to using a square-wave input voltage, circuit simulations demonstrate that a 5-level multilevel inverter reduces the total harmonic distortion (THD) of the received current from 6.79 % to 0.69 %, effectively reducing the harmonic currents in the receiver by 90 %.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Realization of High Resistivity and Low-Temperature Coefficient of Resistivity in Fe-20mn-11al-5cr-1c-0.01b Alloy Through Microstructure control

SSRN

引用

SSRN 2024年

作者： Takeuchi, Nobuaki Iizuka, Masatoshi Kosuke, Kemmotsu Ando, Daisuke Ishida, Kiyohito Sutou, Yuji Department of Materials Science Graduate School of Engineering Tohoku University Sendai980-8579 Japan Advanced Institute for Materials Research Tohoku University Sendai980-8577 Japan

Metallic alloys typically follow the Mooij rule, which describes the trade-off relationship between electrical resistivity and the temperature coefficient of resistivity (TCR). Fe-20Mn-11Al-5Cr-1C-0.01B (mass%) alloy, annealed at temperatures ranging from 600℃ to 1000℃, deviates from the Mooij rule and exhibits excellent electrical properties, including high electrical resistivity and low TCR. X-ray diffraction measurements revealed that the constituent phases of the alloys are α-, γ-, κ-, and carbide phases. TCR is significantly influenced by the fraction of α-phase, the concentration of solute elements in the matrix phases, magnetism, and the quantity of precipitated carbides in the matrix. The results indicate that controlling the microstructure of metallic alloys can achieve high resistivity and low TCR, thereby deviating from the Mooij rule. © 2024, The Authors. All rights reserved.

关键词： Microstructure

来源：评论

学校读者我要写书评

暂无评论

Carbon Penetration Behavior of Cr-Mo Steel Specimen in Carburizing Above Eutectic Temperature 27

Carbon Penetration Behavior of Cr-Mo Steel Specimen in Carbu...

引用

27th Congress of the International Federation for Heat Treatment and Surface engineering, IFHTSE 2022 and European Conference on Heat Treatment 2022, ECHT 2022

作者： Yamamoto, Ryosuke Nishimoto, Akio Graduate School of Science and Engineering Kansai University Osaka564-8680 Japan JTEKT Thermo Systems Coporation Nara632-0084 Japan Department of Chemistry and Materials Engineering Faculty of Chemistry Materials and Bioengineering Kansai University Osaka564-8680 Japan

ISBN: (纸本)9783200085848

Carburizing and quenching are one of the surface modification treatments to impart mechanical properties to materials. Carburizing is a lengthy process, generally performed at approximately 1203 K. Conventional carburizing (gas carburizing or low pressure carburizing) is processed in batches. Consequently, this creates many in-process inventories, which negatively affects the production efficiency. To devise an efficient production process, it is necessary to reduce the carburizing duration. Carburizing is a carbon-diffusion phenomenon, and increasing the temperature accelerates the process. In this study, we investigated the carbon penetrating behavior of a steel specimen by carburization it at temperatures 1473 K to 1573 K, which are above the eutectic temperature of the specimen. A ring specimen-Cr-Mo steel (JIS SCM420) was used in this investigation. Methane and nitrogen gases were used for carburizing. The specimen was rapidly heated by induction heating in a carburized atmosphere and kept for processing at each temperature, followed by quenching. It was observed that the time required to reach the same total carburizing depth was 1/20 times of the treatment at 1203 K compared to that of the treatment at 1523 K. Moreover, the total carburizing depth variations followed the parabolic law, the Harris’s empirical formula. It was evident that carbon penetration is proportional to the duration of the carburizing process. The rate of carbon penetration per unit time varied exponentially with the carburizing temperature. The activation energy was calculated from the Arrhenius plot of carbon penetration rate, which was close to that in the decomposition reaction of methane. Thereby, it was verified that the carburizing reaction is rate-controlled by the decomposition reaction of methane. © 2022 Quaker Houghton. All right reserved.

关键词： Induction heating

来源：评论

学校读者我要写书评

暂无评论

New Level-Set-Based Shape Recovery Method and its application to sparse-view shape tomography 21

New Level-Set-Based Shape Recovery Method and its applicatio...

引用

2021 4th International Conference on Digital Medicine and Image Processing

作者： Haytham A. Ali Hiroyuki Kudo Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba Japan and Department of MathematicsFaculty of Science Sohag University Egypt Department of Computer Science Graduate School of Systems and Information Engineering University of Tsukuba Japan

ISBN: (纸本)9781450386487

The recovery of shapes from a few numbers of their projections is very important in Computed tomography. In this paper, we propose a novel scheme based on a collocation set of Gaussian functions to represent any object by using a limited number of projections. This approach provides a continuous representation of both the implicit function and its zero level set. We show that the appropriate choice of a basis function to represent the parametric level-set leads to an optimization problem with a modest number of parameters, which exceeds many difficulties with traditional level set methods, such as regularization, re-initialization, and use of signed distance function. For the purposes of this paper, we used a dictionary of Gaussian function to provide flexibility in the representation of shapes with few terms as a basis function located at lattice points to parameterize the level set function. We propose a convex program to recover the dictionary coefficients successfully so it works stably with only four projections by overcoming the issue of local-minimum of the cost function. Finally, the performance of the proposed approach in three examples of inverse problems shows that our method compares favorably to Sparse Shape Composition (SSC), Total Variation, and Dual Problem.

关键词： Compressed sensing Computed tomography Convex optimization Gaussian function Level set Reconstruction method Shape identification X-ray tomography

来源：评论

学校读者我要写书评

暂无评论

Microstructure Observation of T-Phases in Al-Zn-Mg Alloy with Low Zn/Mg Ratio

SSRN

引用

SSRN 2024年

作者： Ahmed, Abrar Lee, Seungwon Tsuchiya, Taiki Matsuda, Kenji Nishimura, Katsuhiko Numomura, Norio Toda, Hiroyuki Hirayama, Kyosuke Shimizu, Kazuyuki Yamaguchi, Masatake Tsuru, Tomohito Graduate School of Science and Engineering for Education University of Toyama Toyama930-8555 Japan Graduate School of Science and Engineering for Research University of Toyama Toyama930-8555 Japan Department of Mechanical Engineering Kyushu University Fukuoka819-0395 Japan Department of Materials Science and Engineering Kyoto University Kyoto606-8501 Japan Graduate School of Science and Engineering Tottori University 4-101 kyoama Minami Tottori Japan Center for Computational Science and e-Systems Japan Atomic Energy Agency Tokai Ibaraki319-1195 Japan Nuclear Science and Engineering Center Japan Atomic Energy Agency Tokai Ibaraki319-1195 Japan

For the first time, this study clarifies the T'', T', and T phases in Al-Zn-Mg alloy with a low Zn/Mg ratio and evaluates the shape of the precipitate morphology according to different zone directions of the Al matrix. The orientation relationship, shape, misfit, and interfacial conditions between the T'', T', and T phases and the Al matrix were investigated using high-resolution transmission electron microscopy (HR-TEM). We differentiated the T'' (1.387 nm), T' (1.422 nm), and T (1.456 nm) phases by calculating the lattice parameters in HR-TEM images. We also identified the T'', T', and T phases by diffraction patterns along the , , , and zone directions of the Al matrix. Additionally, we introduce the different orientation relationships of the T phase with the Al matrix, The [[[EQUATION]]0] zone direction of the Al is parallel to the [[[EQUATION]]20] direction of the T-phase, and the plane of ([[EQUATION]]1) of the Al is parallel to the plane of ([[EQUATION]]) of the T-phase. Among Al alloys, the 7xxx series is known for its superior strength due to the co-precipitation of the η and T phases. While previous research has extensively examined the precipitation sequence, composition, atomic structure, and phase transformation mechanisms of the η phase, the T phase has received less attention. Our observations provide insight into the behavior of T phase crystals, which is crucial for understanding the microstructural evolution of Al-Zn-Mg alloys and for designing materials with desired properties. © 2024, The Authors. All rights reserved.

关键词： High resolution transmission electron microscopy

来源：评论

学校读者我要写书评

暂无评论

Continuous structural phase transition and antiferromagnetic order in ilmenite-type NiVO3

引用

Physical Review Materials 2024年第9期8卷 094402页

作者： Hajime Yamamoto Osamu Ikeda Takashi Honda Kenta Kimura Takuya Aoyama Kenya Ohgushi Akio Suzuki Kenji Ishii Daiju Matsumura Takuya Tsuji Shintaro Kobayashi Shogo Kawaguchi Matteo d’Astuto Tadashi Abukawa Institute of Multidisciplinary Research for Advanced Materials Department of Earth Science Graduate School of Science Institute of Materials Structure Science Department of Materials Science Graduate School of Engineering Department of Physics Graduate School of Science National Institutes for Quantum Science and Technology (QST) 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo 679-5198 Japan 1-1-1 Kouto Sayo-cho Sayo-gun Hyogo 679-5198 Japan CNRS Grenoble INP Institut Néel F-38000 Grenoble France International Center for Synchrotron Radiation Innovation Smart

We investigate the crystal and electronic structures as well as magnetic properties of ilmenite-type NiVO3, which has attracted research interest as an S = 1 honeycomb lattice magnet. Ilmenite-type NiVO3 samples were synthesized under high-pressure and high-temperature conditions. Synchrotron x-ray diffraction and Rietveld refinement results demonstrated that NiVO3 underwent a continuous structural phase transition from the triclinic (P1¯) phase to the rhombohedral (R3¯) phase at 450 K. This transition is concomitant with the decomposition of the V-V dimers formed by the tetravalent V ions. X-ray absorption spectroscopy measurements confirmed that the Ni and V ions were divalent and tetravalent, respectively. Magnetic and specific heat measurements revealed that NiVO3 underwent an antiferromagnetic transition at 140 K, and a zigzag-type magnetic order with magnetic propagation vector k=(0,1/2,0) was observed by neutron diffraction measurements.

关键词： Antiferromagnetism Chemical bonding Crystal structure Magnetic order Magnetism Methods in magnetism Peierls transition Phase transitions Structural properties Antiferromagnets Ceramics Crystal structures Crystalline systems Inorganic compounds Magnetic insulators Mott insulators Nickelates Oxides Polycrystalline materials Strongly correlated systems Transition metal oxides Vanadates Crystallization Crystallography DC susceptibility measurements Magnetic techniques Magnetization measurements Neutron diffraction Neutron techniques Pressure techniques Sample preparation Sintering Specific heat measurements X-ray absorption near-edge spectroscopy X-ray absorption spectroscopy X-ray diffraction X-ray powder diffraction

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：