检索结果-内蒙古大学图书馆

Adaptive power management for self-powered IoT on smart shoes

AIP Conference Proceedings 2020年第1期2228卷

作者： Muladi Adim Firmansah Aripriharta Ilham Ari Elbaith Zaeni Anik Nur Handayani I. Made Wirawan Gwo Jiun Horng 1Department of Electrical Engineering Faculty of Engineering Universitas Negeri Malang Indonesia 2Centre of Advanced Materials for Renewable Energy Indonesia 3Pascasarjana Faculty of Engineering Universitas Negeri Malang Indonesia 4Department of Computer Science and Information Engineering Southern Taiwan University of Science and Technology Tainan City Taiwan

This paper presents an adaptive method for power management in smart shoes data transmission. The device communication module consumes a lot of energy. The transmission power is set to maximum by default. The maximum transmission power is not needed when the node is near the sink. But, the low transmission power is not guaranteed data successfully sent when the device is far from the sink. The transmission power control method is important to avoiding retransmission and improve energy efficiency. The proposed method uses a fuzzy logic controller (FLC) to develop an adaptive system. The FLC uses RSSI and the amount of available energy as an input parameter. The system will choose the shortest path based on RSSI. Data exchange between nodes scattered in smart and moving shoes with users can be set by Fuzzy placed on the sink. Sink collects data and sends it to the cloud. The test is carried out on the general device using conventional method compared to the proposed method. The lifetime of both devices compared. Based on experiments, sports fields with several users with relaxed, brisk and running modes show significant power savings compared to conventional methods. The proposed method provides energy efficiency up to 9.2% better than conventional power management.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Leveraging randomized compiling for the QITE algorithm

arXiv

引用

arXiv 2021年

作者： Ville, Jean-Loup Morvan, Alexis Hashim, Akel Naik, Ravi K. Lu, Marie Mitchell, Bradley Kreikebaum, John-Mark O’Brien, Kevin P. Wallman, Joel J. Hincks, Ian Emerson, Joseph Smith, Ethan Younis, Ed Iancu, Costin Santiago, David I. Siddiqi, Irfan Quantum Nanoelectronics Laboratory Dept. of Physics University of California at Berkeley BerkeleyCA94720 United States Computational Research Division Lawrence Berkeley National Lab BerkeleyCA94720 United States Materials Sciences Division Lawrence Berkeley National Lab BerkeleyCA94720 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States Inst. for Quantum Computing Dept. of Applied Mathematics University of Waterloo WaterlooONN2L 3G1 Canada Quantum Benchmark Inc. KitchenerONN2H 5G5 Canada

The success of the current generation of Noisy Intermediate-Scale Quantum (NISQ) hardware shows that quantum hardware may be able to tackle complex problems even without error correction. One outstanding issue is that of coherent errors arising from the increased complexity of these devices. These errors can accumulate through a circuit, making their impact on algorithms hard to predict and mitigate. Iterative algorithms like Quantum Imaginary Time Evolution are susceptible to these errors. This article presents the combination of both noise tailoring using Randomized Compiling and error mitigation with a purification. We also show that Cycle Benchmarking gives an estimate of the reliability of the purification. We apply this method to the Quantum Imaginary Time Evolution of a Transverse Field Ising Model and report an energy estimation and a ground state infidelity both below 1%. Our methodology is general and can be used for other algorithms and platforms. We show how combining noise tailoring and error mitigation will push forward the performance of NISQ devices. © 2021, CC BY.

关键词： Benchmarking

来源：评论

学校读者我要写书评

暂无评论

Environmentally stable room temperature continuous wave lasing in defect-passivated perovskite

arXiv

引用

arXiv 2019年

作者： Moon, Jiyoung Alahbakhshi, Masoud Gharajeh, Abouzar Kwon, Sunah Haroldson, Ross Li, Zhitong Hawkins, Roberta Kim, Moon J. Hu, Walter Zakhidov, Anvar Gu, Qing Department of Materials Science and Engineering University of Texas at Dallas RichardsonTX75080 United States Department of Electrical and Computer Engineering University of Texas at Dallas RichardsonTX75080 United States Department of Physics University of Texas at Dallas RichardsonTX75080 United States Department of Nanophotonics and Metamaterials ITMO University St. Petersburg Moscow Russia

Metal halide perovskites have emerged as promising gain materials for on-chip lasers in photonic integrated circuits (PICs). However, stable continuous wave (CW) lasing behavior under optical pumping at room temperature - a prerequisite for electrically pumped lasing - has not yet been demonstrated. To achieve stable CW operation, we introduce a multiplex of strategies that include morphological, structural and interfacial engineering of CH3NH3PbBr3 (MAPbBr3) thin films to improve perovskite’s intrinsic stability, as well as high quality cavity design to reduce the operational power. We demonstrate for the first time, over 90-minute-long green CW lasing with 9.4W/cm2 threshold from a polycarbonate (PC) -defect-passivated, directly patterned MAPbBr3 two-dimensional photonic crystal (PhC) cavity without any substrate cooling. We also show our approach’s effectiveness on the performance of MAPbBr3 under electrical excitation: we observe a seven-fold current efficiency enhancement by applying our strategies to a MAPbBr3 LED. This work paves the way to the realization of electrically pumped lasing in perovskites. Copyright © 2019, The Authors. All rights reserved.

关键词： Perovskite

来源：评论

学校读者我要写书评

暂无评论

Publisher’s Note: “Methods to accelerate high-throughput screening of atomic qubit candidates in van der Waals materials” [J. Appl. Phys. 129, 225105 (2021)]

引用

Journal of Applied Physics 2021年第1期130卷

作者： Rodrick Kuate Defo Haimi Nguyen Mark J. H. Ku Trevor David Rhone 1Department of Electrical and Computer Engineering Princeton University Princeton New Jersey 08540 USA 2John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge Massachusetts 02138 USA 3Department of Chemistry Columbia University New York New York 10027 USA 4Department of Physics and Astronomy and Department of Materials Science and Engineering University of Delaware Newark Delaware 19716 USA 5Department of Physics Applied Physics and Astronomy Rensselaer Polytechnic Institute Troy New York 12180 USA

This article was originally published online on 9 June 2021 with an error in Table VI. Table VI appears correct below. All online and printed versions of the ar

关键词：

来源：评论

学校读者我要写书评

暂无评论

Qutrit randomized benchmarking

arXiv

引用

arXiv 2020年

作者： Morvan, A. Ramasesh, V.V. Blok, M.S. Kreikebaum, J.M. O'Brien, K. Chen, L. Mitchell, B.K. Naik, R.K. Santiago, D.I. Siddiqi, I. Quantum Nanoelectronics Laboratory Dept. of Physics University of California at Berkeley BerkeleyCA94720 United States Computational Research Division Lawrence Berkeley National Lab BerkeleyCA94720 United States Department of Physics and Astronomy University of Rochester RochesterNY14627 United States Materials Sciences Division Lawrence Berkeley National Lab BerkeleyCA94720 United States Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA02139 United States

Ternary quantum processors offer significant computational advantages over conventional qubit technologies, leveraging the encoding and processing of quantum information in qutrits (three-level systems). To evaluate and compare the performance of such emerging quantum hardware it is essential to have robust benchmarking methods suitable for a higher-dimensional Hilbert space. We demonstrate extensions of industry standard Randomized Benchmarking (RB) protocols, developed and used extensively for qubits, suitable for ternary quantum logic. Using a superconducting fivequtrit processor, we find a single-qutrit gate infidelity as low as 2.38 × 10-3. Through interleaved RB, we find that this qutrit gate error is largely limited by the native (qubit-like) gate fidelity, and employ simultaneous RB to fully characterize cross-talk errors. Finally, we apply cycle benchmarking to a two-qutrit CSUM gate and obtain a two-qutrit process fidelity of 0.82. Our results demonstrate a RB-based tool to characterize the obtain overall performance of a qutrit processor, and a general approach to diagnose control errors in future qudit hardware. Copyright © 2020, The Authors. All rights reserved.

关键词： Benchmarking

来源：评论

学校读者我要写书评

暂无评论

Modelling of adaptive power management circuit with feedback for self-powered IoT

引用

Journal of Physics: Conference Series 2020年第1期1595卷

作者： A Aripriharta A Firmansah M Yazid I D Wahyono Muladi G J Horng Department of Electrical Engineering Faculty of Engineering Universitas Negeri Malang Indonesia Centre of Advanced Materials for Renewable Energy (CAMRY) Universitas Negeri Malang Indonesia Postgraduate Faculty of Engineering Universitas Negeri Malang Indonesia Department of Biomedical Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia. Department of Computer Science and Information Engineering Southern Taiwan University of Science and Technology Tainan City Taiwan

In general, self-powered sensor networks/Internet of Things (IoT) are equipped with a power management system and use a timer as a reference for the device's actives time, both using an internal timer and an external timer. The system is less efficient because it requires that there are parts that continue to function when the device is in sleep mode. In addition, the amount of harvested energy also influenced by many factors with an uncertain amount. An IoT self-powered system that uses a timer as an active interval reference will encounter problems when the amount of system energy demand is greater than the harvested energy. This paper presents an adaptive power management system equipped with feedback for self-powered IoT for room temperature and humidity monitoring applications. The power management system can provide adaptive active intervals based on the harvested energy capacity. Microcontrollers send feedback to the power management circuit at the end of each cycle. The power management circuit immediately disconnects the controller circuit from the energy storage's component (supercapacitor) so that energy used efficiently. Several methods of minimizing the energy consumption of the device are also applied to provide optimal results. The research method begins with system modelling, including an energy harvester circuit, power management, and controller. The research scenarios include energy harvester performance tests, calculating the energy requirements of the power management and controller circuit, and validating research results. Overall, the system can work well, the active interval/data transmission of 14.41 seconds to 22.34 seconds in a room with a light intensity of 800 lux to 1000 lux.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Cover Picture: Laser-scribed Graphene Electrodes as an Electrochemical Immunosensing Platform for Cancer Biomarker ‘eIF3d’ (Electroanalysis 4/2021)

引用

Electroanalysis 2021年第4期33卷

作者： Simge Balaban Tutku Beduk Ceren Durmus Eda Aydindogan Khaled Nabil Salama Suna Timur Department of Biochemistry Faculty of Science Ege University 35100 Bornova Izmir Turkey Sensors Lab Advanced Membranes and Porous Materials Center Computer Electrical and Mathematical Science and Engineering Division King Abdullah University of Science and Technology (KAUST) 23955-6900 Thuwal Saudi Arabia Central Research Testing and Analysis Laboratory Research and Application Center Ege University 35100 Bornova Izmir Turkey

来源：评论

学校读者我要写书评

暂无评论

Direct detection of multiple backward volume modes in yttrium iron garnet at micron scale wavelengths

引用

Physical Review B 2019年第1期99卷 014435-014435页

作者： Jinho Lim Wonbae Bang Jonathan Trossman Andreas Kreisel Matthias Benjamin Jungfleisch Axel Hoffmann C. C. Tsai John B. Ketterson Department of Physics and Astronomy Northwestern University Evanston Illinois 60208 USA Materials Science Division Argonne National Laboratory Argonne Illinois 60439 USA Institut für Theoretische Physik Universität Leipzig D-04103 Leipzig Germany Department of Physics and Astronomy University of Delaware Newark Delaware 19716 USA Department of Engineering & Management of Advanced Technology Chang Jung Christian University Tainan 71101 Taiwan Department of Electrical and Computer Engineering Northwestern University Evanston Illinois 60515 USA

Using a set of wave-vector-specific multielement antennas, we have characterized the dispersion of spin waves in an yttrium iron garnet film at submicron lengths and resolved the dispersion relations of multiple backward volume modes, particularly in the region of their minima. The techniques developed now facilitate the characterization of spin waves at length scales limited only by available lithography and at a spectral resolution that generally exceeds that of Brillouin scattering. The data obtained are in excellent agreement with theoretical predictions based on a model Hamiltonian.

关键词： Dipolar interaction Exchange interaction Spin waves Monolayer films Ferromagnetic resonance Heisenberg model Holstein-Primakoff method Lithography

来源：评论

学校读者我要写书评

暂无评论

Publisher’s Note: “Glass formation in amorphous ZnO films revealed by chip calorimetry” [J. Appl. Phys 127, 115105 (2020)]

引用

Journal of Applied Physics 2020年第14期128卷

作者： Andre Zeumault 1Department of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30318 USA 2School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta Georgia 30318 USA 3Department of Electrical Engineering and Computer Science The University of Tennessee Knoxville Tennessee 37996 USA 4Department of Materials Science and Engineering The University of Tennessee Knoxville Tennessee 37996 USA

This article was originally published on 18 March 2020 without a complete list of affiliations. The affiliations are correct as they appear above.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Real-space observation of skyrmion clusters with mutually orthogonal skyrmion tubes

引用

Physical Review B 2019年第10期100卷 104401-104401页

作者： Hayley R. O. Sohn Sergei M. Vlasov Valeriy M. Uzdin Andrey O. Leonov Ivan I. Smalyukh Soft Materials Research Center and Materials Science and Engineering Program University of Colorado Boulder Colorado 80309 USA ITMO University 197101 Saint Petersburg Russia Department of Physics Saint Petersburg State University Saint Petersburg 198504 Russia Chirality Research Center Hiroshima University Higashi Hiroshima Hiroshima 739-8526 Japan Department of Chemistry Faculty of Science Hiroshima University Kagamiyama Higashi Hiroshima Hiroshima 739-8526 Japan IFW Dresden Postfach 270016 D-01171 Dresden Germany Department of Physics and Department of Electrical Computer and Energy Engineering University of Colorado Boulder Colorado 80309 USA Renewable and Sustainable Energy Institute National Renewable Energy Laboratory and University of Colorado Boulder Colorado 80309 USA

We report the discovery and direct visualization of skyrmion clusters with mutually orthogonal orientations of constituent isolated skyrmions in chiral liquid crystals and ferromagnets. We show that the nascent conical state underlies the attracting inter-skyrmion potential, whereas an encompassing homogeneous state leads to the repulsive skyrmion-skyrmion interaction. The crossover between different regimes of skyrmion interaction could be identified upon changing layer thickness and/or the surface anchoring. We develop a phenomenological theory describing two types of skyrmions and the underlying mechanisms of their interaction. We show that isolated horizontal skyrmions with the same polarity may approach a vertical isolated skyrmion from both sides and thus constitute two energetically different configurations which are also observed experimentally. In an extreme regime of mutual attraction, the skyrmions wind around each other forming compact superstructures with undulations. We also indicate that our numerical simulations on skyrmion clusters are valid in a parameter range corresponding to the A-phase region of cubic helimagnets.

关键词： Exotic phases of matter Helicoidal magnetic texture Micromagnetism Nematic order Nucleation Skyrmions Spin texture Symmetry protected topological states

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：