检索结果-内蒙古大学图书馆

32nd IEEE International Symposium on Industrial Electronics, ISIE 2023

作者： Choi, Kyunghwan Park, Ki-Bum Gwangju Institute of Science and Technology School of Mechanical Engineering Gwangju Korea Republic of Korea Advanced Institute of Science and Technology Cho Chun Shik Graduate School of Mobility Daejeon Korea Republic of

ISBN: (纸本)9798350399714

Conventional model predictive torque control (MPTC) of synchronous machines (SMs) relies on a current or stator flux reference generator to attract the d-axis current or stator flux to desired operating points while minimizing the torque error. However, using a reference generator has two issues: 1) an additional demanding optimization is required to obtain the reference generator, and 2) the additional optimization restricts the degrees of freedom (DOF) for MPTC to determine the operating points of SMs. Therefore, this study presents an MPTC scheme that does not rely on a current or stator flux reference generator. To this end, first, a novel MPTC problem is formulated to minimize a performance index while satisfying the torque, voltage, and current constraints. The performance index, e.g., copper loss or inverter loss, determines how the MPTC utilizes the DOF in the torque control. Then, the proposed MPTC problem, a nonlinear optimization, is solved based on the finite control set (FCS) using the Augmented Lagrangian method. Simulation results obtained using a 50-kW SM show that 1) the proposed MPTC guarantees optimal operation under all operating regions without a reference generator, and 2) it can significantly enhance efficiency by utilizing its DOF in determining the operating point. © 2023 IEEE.

关键词： Torque

来源：评论

学校读者我要写书评

暂无评论

Performance Comparison of Long-Horizon FCS-MPC for IPMSM Considering THDi and Inverter Loss 11

Performance Comparison of Long-Horizon FCS-MPC for IPMSM Con...

引用

11th International Conference on Power Electronics - ECCE Asia, ICPE 2023-ECCE Asia

作者： Kim, Jongseok Lee, Youngseok Choi, Kyunghwan Song, Jiho Park, Ki-Bum Korea Advanced Institute of Science and Technology Cho Chun Shik Graduate School of Mobility Daejeon Korea Republic of Gwangju Institute of Science and Technology School of Mechanical Engineering Gwangju Korea Republic of

ISBN: (纸本)9788957083505

In this paper, the feasibility of achieving performance benefits in two control objectives is analyzed using long-horizon finite control set-model predictive control for an interior permanent magnet synchronous motor. Current reference tracking and minimization of inverter loss are used as control objectives in a cost function. At the fixed sampling period, simulation results show the trend that the current total harmonic distortion and inverter efficiency improve as the length of the prediction horizon increases. To derive results of considering the sampling period and weighting factor effects, Monte Carlos simulations were carried out. Considering the real-time implementation and the system performance, length of horizon and sampling period should be decided depending on the motor speed and torque with an appropriate weighting factor. © 2023 The Korean Institute of Power Electronics.

关键词： Model predictive control

来源：评论

学校读者我要写书评

暂无评论

Influence of High-Pressure Induced Lattice Dislocations and Distortions on Thermoelectric Performance of Pristine SnTe

引用

Chinese Physics Letters 2024年第5期41卷 61-68页

作者：郑博文陈涛孙海瑞杨曼曼杨兵超陈欣张永胜刘晓兵 Laboratory of High-Pressure Physics and Materials Science School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Advanced Research Institute of Multidisciplinary Sciences Qufu Normal UniversityQufu 273165China Key Lab of Photovoltaic and Energy Conservation Materials Institute of Solid State Physics HFIPSChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China School of Electronic Engineering Huainan Normal University Huainan 232038China

As a sister compound of PbTe, SnTe possesses the environmentally friendly elements. However, the pristine SnTe compounds suffer from the high carrier concentration, the large valence band offset between the L and Σpositions and high thermal conductivity. Using high-pressure and high-temperature technology, we synthesized the pristine SnTe samples at different pressures and systemically investigated their thermoelectric *** pressure induces rich microstructures, including the high-density dislocations and lattice distortions, which serve as the strong phonon scattering centers, thereby reducing the lattice thermal conductivity. For the electrical properties, pressure reduces the harmful high carrier concentration, due to the depression of Sn ***, pressure induces the valence band convergence, reducing the energy separation between the L and Σpositions. The band convergence and suppressed carrier concentration increase the Seebeck coefficient. Thus, the power factors of pressure-sintered compounds do not deteriorate significantly under the condition of decreasing electrical conductivity. Ultimately, for a pristine SnTe compound synthesized at 5 GPa, a higher ZT value of 0.51 is achieved at 750 K, representing a 140% improvement compared to the value of 0.21 obtained using SPS. Therefore, the high-pressure and high-temperature technology is demonstrated as an effectively approach to optimize thermoelectric performance.

关键词： coefficient properties positions

来源：评论

学校读者我要写书评

暂无评论

Detectability of Resistive Open Defects with Analog Relaxation Oscillators under Unit-to-Unit Variations of Dies

Detectability of Resistive Open Defects with Analog Relaxati...

引用

2024 International 3D Systems Integration Conference, 3DIC 2024

作者： Yamahashi, Yuya Ohtera, Yuto Yotsuyanagi, Hiroyuki Lu, Shyue-Kung Hashizume, Masaki Graduate School of Sciences and Technology for Innovation Tokushima University Tokushima Japan Graduate School of Advanced Technology and Science Tokushima University Tokushima Japan Graduate School of Technology Industrial and Sciences Tokushima University Tokushima Japan Department of Electrical Engineering National Taiwan University to Science and Technology Taipei Taiwan Tokushima Study Center Open University of Japan Tokushima Japan

ISBN: (纸本)9798331516505

We designed a built-in test circuit to detect resistive open defects at interconnects between dies in 3D stacked ICs using relaxation oscillators made of only analog circuit elements. We also designed a test circuit by which process variations of the oscillators could be eliminated in tests. We examined the detectability of such resistive open defects by the test method based on the test circuit in a 3D stacked IC made of dies whose process variations were not identical by circuit simulations. The results show that resistive open defects of 7.0 Ω and above can be detected by the test circuit. © 2024 IEEE.

关键词： Relaxation oscillators

来源：评论

学校读者我要写书评

暂无评论

Unexpected nucleation mechanism of T_(1) precipitates by Eshelby inclusion with unstable stacking faults

引用

Materials Genome engineering Advances 2024年第2期2卷 134-144页

作者： Shuo Wang Junsheng Wang Chengpeng Xue Xinghai Yang Guangyuan Tian Hui Su Yisheng Miao Quan Li Xingxing Li School of Materials Science and Engineering Beijing Institute of TechnologyBeijingChina Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijingChina

Aluminum-lithium(Al-Li)alloy is one of the most promising lightweight structural materials in the aeronautic and aerospace *** key to achieving their excellent mechanical properties lies in tailoring T1 strengthening precipitates;however,the nucleation of such nanoparticles remains *** atomic resolution HAADF-STEM with first-principles calculations based on the density functional theory(DFT),here,we report a counterintuitive nucleation mechanism of the T1 that evolves from an Eshelby inclusion with unstable stacking *** precursor is accelerated by Ag-Mg clusters to reduce the barrier,forming the structural *** addition,these Ag-Mg clusters trap the free Cu and Li to prepare the chemical compositions for *** findings provide a new perspective on the phase transformations of complex precipitates through solute clusters in terms of geometric structure and chemical bonding functions.

关键词： Al alloy DFT nucleation phase tranformation precipitation

来源：评论

学校读者我要写书评

暂无评论

Titanium Culture Vessel Presenting Temperature Gradation for the Thermotolerance Estimation of Cells

引用

Cyborg and Bionic Systems 2023年第1期4卷 166-177页

作者： Chikahiro Imashiro Yangyan Jin Motoaki Hayama Takahiro GYamada Akira Funahashi Katsuhisa Sakaguchi Shinjiro Umezu Jun Komotori Graduate School of Engineering The University of TokyoTokyo 113-0033Japan Department of Mechanical Engineering Keio UniversityYokohamaKanagawa 223-0061Japan School of Integrated Design Engineering Graduate School of Science and TechnologyKeio UniversityYokohamaKanagawa 223-0061Japan Department of Biosciences and Informatics Keio UniversityYokohamaKanagawa 223-0061Japan Department of Integrative Bioscience and Biomedical Engineering Graduate School of Advanced Science and EngineeringWaseda UniversityTWInsTokyo 162-8480Japan Department of Modern Mechanical Engineering Waseda UniversityTokyo 169-8555Japan

Hyperthermia can be induced to exploit the thermal intolerance of cancer cells,which is worse than that of normal cells,as a potential noninvasive cancer *** develop an effective hyperthermia treatment,thermal cytotoxicity of cells should be comprehensively ***,to conduct such investigations,the culture temperature must be accurately *** previously reported a culture system in which the culture temperature could be accurately regulated by employing metallic culture ***,appropriate temperature conditions for hyperthermia depend on the cell ***,several experiments need to be conducted,which is a bottleneck of inducing ***,we developed a cell culture system with temperature gradation on a metallic culture *** Cancer Foundation-7 cells and normal human dermal fibroblasts were used as cancer and normal cell models,*** cells showed stronger thermal tolerance;this was because the novel system immediately exhibited a temperature ***,the developed culture system can be used to investigate the optimum thermal conditions for effective hyperthermia ***,as the reactions of cultured cells can be effectively assessed with the present results,further research involving the thermal stimulation of cells is possible.

关键词： stimulation culture Titanium

来源：评论

学校读者我要写书评

暂无评论

Effect of alloy compositions and aging conditions on tensile properties of cold-rolled Al-Mg-Si alloys

引用

Keikinzoku/Journal of Japan Institute of Light Metals 2023年第12期73卷 592-597页

作者： Fukuzawa, Hiroki Ishii, Yuki Kobayashi, Junya Kobayashi, Equo Ohnuma, Masato Kuramoto, Shigeru Itoh, Goroh Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Ibaraki Hitachi-shi316-8511 Japan Department of Materials Science and Engineering School of Materials and Chemical Technology Tokyo Institute of Technology Tokyo Meguro-ku Japan Division of Quantum Science and Engineering Faculty of Engineering Centre for Advanced Research of Energy and Materials Hokkaido University Hokkaido Sapporo-shi Japan

Tensile properties have been evaluated for four kinds of Al-Mg-Si base alloys which were cold rolled by 90% and subsequently aged for 1 min, 30 min, 18 h at 170°C. To study the effect of alloy compositions and aging conditions on deformation behavior, fracture surface observations and strain distribution analysis during tensile deformation were performed. Strain distribution in the tensile specimens was evaluated by digital image correlation method. The ductility in the specimens aged for 1 min and 30 min after cold rolling was improved due to increase in both uniform and local elongation. All the specimens showed ductile fracture, while the specimen added with 0.71%Fe showed slightly lower ductility. The addition of copper improved strength without deteriorating ductility. The relation between mechanical properties and microstructure is discussed to obtain basic information required to improve strength and ductility of Al-Mg-Si alloys. © 2023 The Japan Institute of Light Metals.

关键词： Silicon alloys

来源：评论

学校读者我要写书评

暂无评论

Secure RFID-Assisted Authentication Protocol for Vehicular Cloud Computing Environment

引用

IEEE Transactions on Intelligent Transportation Systems 2024年第9期25卷 12528-12537页

作者： Saleem, Muhammad Asad Li, Xiong Mahmood, Khalid Tariq, Tayyaba Alenazi, Mohammed J. F. Das, Ashok Kumar University of Electronic Science and Technology of China School of Computer Science and Engineering Chengdu611731 China Institute for Cyber Security School of Computer Science and Engineering University of Electronic Science and Technology of China Chengdu611731 China Sichuan University Key Laboratory of Data Protection and Intelligent Management Ministry of Education Chengdu610065 China Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen518000 China National Yunlin University of Science and Technology Graduate School of Intelligent Data Science Yunlin Douliu64002 Taiwan National Yunlin University of Science and Technology Graduate School of Engineering Science and Technology Yunlin Douliu64002 Taiwan King Saud University College of Computer and Information Sciences Department of Computer Engineering Riyadh11451 Saudi Arabia International Institute of Information Technology Center for Security Theory and Algorithmic Research Hyderabad500032 India

Vehicular network technology has made substantial advancements in recent years in the field of Intelligent Transportation Systems. Vehicular Cloud Computing (VCC) has emerged as a novel paradigm with a substantial increase in data exchange within Vehicular ad-hoc networks (VANETs). VCC integrates cloud computing, vehicular networking, and Internet of Things (IoT) technologies. It enables Infrastructure-to-Vehicle (I2V), Vehicle-to-Vehicle (V2V), and Vehicle-to-Device (V2D) communication. VCC optimizes vehicle, cloud infrastructure, and IoT resources while addressing significant communication security and vehicle-user privacy challenges. To address these issues, we developed an RFID-based authentication protocol for VCC based on a Henon map using a hash function. In addition, we also incorporated a Physical Unclonable Function (PUF) to resist physical tampering attacks. We validate the protocol's security formally and informally. The formal security analysis is conducted through a widely used RoR model. We use the Scyther simulation tool to verify the proposed protocol's security against various attacks. Moreover, we compare the performance of our protocol with similar existing protocols across important performance parameters such as communication and computation overheads and security attributes. The proposed protocol yields substantial improvements, demonstrating a 40.74% reduction in computation overhead and a 13.03% decrease in communication overhead as compared to related protocols, delivering both enhanced performance and resource efficiency. The analysis demonstrates its capacity to support secure communication in the VCC environment and satisfy desirable security attributes. © 2024 IEEE.

关键词： Authentication

来源：评论

学校读者我要写书评

暂无评论

Effects of vortex and antivortex excitations in underdoped Bi2Sr2Ca2Cu3O10+δ bulk single crystals

引用

Physical Review B 2024年第13期110卷 134509页

作者： Takao Watanabe Kenta Kosugi Nae Sasaki Shunpei Yamaguchi Takenori Fujii Ken Hayama Itsuhiro Kakeya Toshimitsu Ito Graduate School of Science and Technology Cryogenic Research Center Department of Electronic Science and Engineering Research Institute for Advanced Electronics and Photonics

The observance of vortex and antivortex effects in bulk crystals can prove the existence of phase-disordered superconductivity in the bulk. To gain insights into the mechanisms that govern superconducting transition in copper oxide high-transition temperature (Tc) superconductors, this study investigated the transport properties of underdoped Bi2Sr2Ca2Cu3O10+δ (Bi-2223) bulk single crystals. The I−V characteristics results and the typical tailing behavior owing to the temperature dependence of in-plane resistivity (ρab) were consistent with the Kosterlitz-Thouless (KT) transition characteristics. Thus, with increasing temperature, copper oxide high-Tc superconductors transitioned to their normal state owing to destruction of their phase correlations, although a finite Cooper pair density was prevalent at Tc. Further, magnetization measurements were performed to determine the temperature dependence of the irreversible magnetic field Birr. Consequently, the mechanism governing the KT transition-like superconducting transition in this bulk system was elucidated. These results support the extreme strong-coupling models for high-Tc superconductivity in cuprates.

关键词： Superconducting phase transition Superconductivity Vortices in superconductors High-temperature superconductors Annealing Crystal growth Magnetization measurements Resistivity measurements

来源：评论

学校读者我要写书评

暂无评论

Magnetic properties of Co-Zr-Si-B melt-spun ribbons

Magnetic properties of Co-Zr-Si-B melt-spun ribbons

引用

2023 IEEE International Magnetic Conference - Short Papers, INTERMAG Short Papers 2023

作者： Tanaka, Masahiro Saito, Tetsuji Chiba Institute of Technology Graduate School of Engineering Narashino275-0016 Japan Chiba Institute of Technology Department of Advanced Materials Science and Engineering Narashino275-0016 Japan

ISBN: (纸本)9798350338362

Co-Zr-Si-B alloys were produced by the melt-spinning technique and subsequent annealing. It was found that the small addition of Si to the Co-Zr-B alloys resulted in an increase in coercivity. The Co-Zr-Si-B alloy with a Si content of 2 at% showed a high coercivity of 5.8 kOe. XRD studies showed that the annealed Co-Zr-Si-B alloy consisted of the Co5Zr phase. Thus, the high coercivity of the Co-Zr-Si-B alloys is believed to be attributable to the existence of the Co5Zr phase. © 2023 IEEE.

关键词： Coercive force

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：