检索结果-内蒙古大学图书馆

A Software Defined Network Scheme for Intra Datacenter Network Based on Fat-Tree Topology

Journal of Physics: Conference Series 2021年第1期2025卷

作者： Siquan Hu Xinyu Wang Zhiguo Shi School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Shunde Graduate School University of Science and Technology Beijing Foshan China Beijing Big Data Center Beijing China

Nowadays datacenters face a big challenge, because the development of cloud services requests a large amount of capital input, high maintenance skills and cost. The major disadvantages of current datacenter network include the high cost of equipment and maintenance, QoS, failure recovery time, network virtualization etc. In this paper, we proposed a software defined datacenter network. The programmable controller is responsible for the management of the traffic scheduling including topology discovery, routing and Quality of Service. The SDN is based on Fat-tree network architecture and max-min fairness. A Genetic Algorithm optimized Radial Basis Function neural network is used to compute the service weight for maximizing the utilization of network resource. An experiment of the network bearing different kinds of services based on Openflow is described. This well-designed fat-tree network has high efficiency in traffic distribution, and has integrated the traditional network architecture and new SDN technology.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Scheduling Data Flow between Data Centers Based on Software Defined Network

引用

Journal of Physics: Conference Series 2021年第1期2025卷

作者： Siquan Hu Zhao Huang Zhiguo Shi School of Computer and Communication Engineering University of Science and Technology Beijing Beijing China Shunde Graduate School University of Science and Technology Beijing Foshan China Beijing Big Data Center Beijing China

For intelligent control of network traffic, to solve the problem of low utilization of public network bandwidth, we put forward scheduling data flow between data center based on SDN technology. First, we connect the data center distributed in different locations by wide area network and exchange or share the research data of high performance. Then, the system can sense the utilization and performance of the network bandwidth resources between the data center. Based on the results of perception, we can dynamically adjust and optimize the path of data and maximize the utilization of network link. SDN is a new software based network structure. This paper uses SDN network architecture to schedule the traffic of data center, and constructs a two-layer network suitable for cloud computing and virtualization environment. It realizes the global, dynamic and intelligent data flow.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Elemental abundances of 44 very metal-poor stars determined from Subaru/IRD near-infrared spectra

arXiv

引用

arXiv 2025年

作者： Aoki, Wako Beers, Timothy C. Honda, Satoshi Matsuno, Tadafumi Placco, Vinicius M. Yoon, Jinmi Kuzuhara, Masayuki Harakawa, Hiroki Hirano, Teruyuki Kotani, Takayuki Kurokawa, Takashi Nishikawa, Jun Omiya, Masashi Tamura, Motohide Vievard, Sébastien National Astronomical Observatory 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Physics and Astronomy JINA Center for the Evolution of the Elements University of Notre Dame Notre DameIN46556 United States Nishi-Harima Astronomical Observatory Center for Astronomy University of Hyogo 407-2 Nishigaichi Sayo-cho Hyogo Sayo679-5313 Japan Astronomisches Rechen-Institut Zentrum für Astronomie der Universität Heidelberg Mönchhofstraße 12–14 Heidelberg69120 Germany NSF NOIRLab 950 N. Cherry Ave. TucsonAZ85719 United States Space Telescope Science Institute 3700 San Martin Dr. BaltimoreMD21218 United States Astrobiology Center 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Subaru Telescope 650 N. Aohoku Place HiloHI96720 United States Institute of Engineering Tokyo University of Agriculture and Technology 2-24-16 Nakacho Koganei Tokyo184-8588 Japan Department of Astronomy Graduate School of Science The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-0033 Japan

关键词： Supernovae

来源：评论

学校读者我要写书评

暂无评论

Optimization and simulation methods in addressing COVID-19 physical distancing policy: A bibliometric analysis

引用

AIP Conference Proceedings 2022年第1期2472卷 040010页

作者： Fazillah Mohmad Kamal Mohd Kamal Mohd Nawawi Ruzelan Khalid Antoni Wibowo Amalia Zahra School of Quantitative Sciences UUM College of Arts and Sciences Universiti Utara Malaysia 06010 UUM Sintok Kedah Malaysia Institute of Strategic Industrial Decision Modeling School of Quantitative Sciences Universiti Utara Malaysia 06010 UUM Sintok Kedah Malaysia Computer Science Department Binus Graduate Program - Master of Computer Science Bina Nusantara University Jakarta Indonesia 11480

COVID-19 has received tremendous attention from scholars worldwide and even being labelled as a black swan event that has disrupted every aspect of human life. Within a short time span of the pandemic, a large volume of research pertaining to COVID-19 has been published in diverse research fields. This paper adopts a bibliometric analysis to systematically evaluate the research development in the application of optimization and simulation methods to address COVID-19 physical distancing policy (OSPhyD) using Bibliometrix R package. A textual query on Scopus database using the combination of four classes of keywords; covid-19, optimization, simulation, and physical distance has returned a total of 299 original research articles and reviews published in English. Appropriate visualizations were generated to describe the collaborations between different authors, countries, and institutions, whilst co-word analysis that uses text mining technique has produced a conceptual cluster via co-occurrence network map to underscore the emerging themes in the current research interest. The main findings pinpoint that: 1) OSPhyD as a scientific research field is an emerging multidisciplinary research topic that is growing progressively and steadily in the fields of medicine, engineering, social sciences, mathematics and decision science, 2) The field has attracted the attention of scholars from all over the world particularly from United States of America, United Kingdom, European countries including authors from Asia, and 3) Three dominant themes or research front emerged from the publications including COVID-19 mainstream, medical education and undergraduate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Community succession and protein enhancement in a mixed methanotroph-microalgae system with stepwise increase of ammonium loading - Inhibition and adaptation

引用

Water Research 2025年 284卷

作者： Baorui Zhang Liang Zhang Jianbo Liu Chen Cai Yan Zhou Interdisciplinary Graduate Program Nanyang Technological University 61 Nanyang Drive Singapore 637335 Singapore Nanyang Environment & Water Research Institute Nanyang Technological University 1 Cleantech Loop Singapore Singapore 637141 Singapore Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation Technology School of Environmental Science and Engineering Sun Yat-Sen University Guangzhou China School of Civil and Environmental Engineering Nanyang Technological University 50 Nanyang Avenue Singapore Singapore 639798 Singapore CAS Key Laboratory of Urban Pollutant Conversion Department of Environmental Science and Engineering University of Science and Technology of China Hefei China

The integration of methanotrophs and microalgae in coculture systems presents a promising approach for sustainable biogas valorization and single-cell protein (SCP) production, offering dual benefits of greenhouse gas mitigation and nutrient recovery from waste streams. However, the resilience and metabolic interplay of these consortia under ammonium stress, common in industrial wastewater, remain poorly understood, limiting their scalability. This study systematically investigated the performance of a microalgae-methanotroph consortium under stepwise ammonium concentrations (130, 200 and 260 mg NH 4 + -N/L). The system demonstrated remarkable acclimation, achieving stable biogas conversion with 95.8 ± 5.3 mg CO 2 -C/(L·day) and 109.0 ± 11.4 mg CH 4 -C/(L·day) even at highest ammonium concentration. The SCP content increased from 32 % to over 52 % of cell dry weight with yield peaking at 90 mg/(L·day) under 200 mg N/L. A microbial community shift from Methylosinus to ammonia-tolerant Methylococcus dominance underpinned functional stability. Metagenomic analyses revealed ammonium-driven metabolic adaptations: extracellular substance secretion reprograms under stress, nitrogen assimilation was enhanced via glutamine synthetase, and antioxidant defenses were activated. Network analysis highlighted intensified competition (31 % negative correlations) under stress, yet key synergies within coculture system sustained carbon and nitrogen metabolism. These findings resolve knowledge gaps in ammonium-stressed consortia dynamics and provide insights for engineering systems to advancing the circular bioeconomy.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bulk-plasmon-mediated free-electron radiation beyond the conventional formation time

arXiv

引用

arXiv 2022年

作者： Tay, Fuyang Lin, Xiao Shi, Xihang Chen, Hongsheng Kaminer, Ido Zhang, Baile Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation ZJUHangzhou Global Science and Technology Innovation Center College of Information Science and Electronic Engineering Zhejiang University Hangzhou310027 China Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley–Curl Institute Rice University HoustonTX77005 United States International Joint Innovation Center The Electromagnetics Academy Zhejiang University Zhejiang University Haining314400 China Department of Electrical Engineering Technion-Israel Institute of Technology Haifa32000 Israel Jinhua Institute of Zhejiang University Zhejiang University Jinhua321099 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 637371 Singapore Centre for Disruptive Photonic Technologies Nanyang Technological University 637371 Singapore

Free-electron radiation is a fundamental photon emission process that is induced by fast-moving electrons interacting with optical media. Historically, it has been understood that, just like any other photon emission process, free-electron radiation must be constrained within a finite time interval known as the "formation time", whose concept is applicable to both Cherenkov radiation and transition radiation, the two basic mechanisms describing radiation from a bulk medium and from an interface, respectively. Here we reveal an alternative mechanism of free-electron radiation far beyond the previously defined formation time. It occurs when a fast electron crosses the interface between vacuum and a plasmonic medium supporting bulk plasmons. While emitted continuously from the crossing point on the interface — thus consistent with the features of transition radiation — the extra radiation beyond the conventional formation time is supported by a long tail of bulk plasmons following the electron’s trajectory deep into the plasmonic medium. Such a plasmonic tail mixes surface and bulk effects, and provides a sustained channel for electron-interface interaction. These results also settle the historical debate in Ferrell radiation, regarding whether it is a surface or bulk effect, from transition radiation or plasmonic oscillation. Copyright © 2022, The Authors. All rights reserved.

关键词： Plasmonics

来源：评论

学校读者我要写书评

暂无评论

Dual-GSE: Resource-efficient Generalized Quantum Subspace Expansion

arXiv

引用

arXiv 2023年

作者： Yang, Bo Yoshioka, Nobuyuki Harada, Hiroyuki Hakkaku, Shigeo Tokunaga, Yuuki Hakoshima, Hideaki Yamamoto, Kaoru Endo, Suguru LIP6 Sorbonne Université 4 Place Jussieu Paris75005 France Graduate School of Information Science and Technology The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Department of Applied Physics School of Engineering University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan Wako-shi Saitama351-0198 Japan JST PRESTO 4-1-8 Honcho Kawaguchi Saitama332-0012 Japan Department of Applied Physics and Physico-Informatics Keio University Hiyoshi 3-14-1 Kohoku Yokohama223-8522 Japan NTT Computer and Data Science Laboratories NTT Corporation 3-9-11 Midori-cho Musashino-shi Tokyo180-8585 Japan Center for Quantum Information and Quantum Biology Osaka University 1-3 Machikaneyama Toyonaka Osaka560-8531 Japan

There are considerable obstacles against realizing practical quantum computing: a significant amount of computation errors and the restricted qubit count. As a unified method of noise-agnostic quantum error mitigation (QEM) methods, i.e., the quantum subspace expansion and virtual purification, a generalized quantum subspace expansion (GSE) has recently been proposed that is significantly robust against stochastic and coherent errors. However, GSE requires entangled measurements between copies of the quantum states, which is a significant drawback under the current situation of the restricted number of qubits and their connectivity. In this work, we propose a resource-efficient implementation of GSE, which we name "Dual-GSE", circumventing significant overheads of state copies by constructing an ansatz of error-mitigated quantum states via dual-state purification. Remarkably, Dual-GSE can further simulate larger quantum systems beyond the size of available quantum hardware with a suitable ansatz construction inspired by divide-and-conquer methods that forge entanglement classically. This also significantly reduces the measurement overhead because we only need to measure subsystems’ Pauli operators. The proposed method is demonstrated by a numerical simulation of the eight-qubit transverse-field Ising model, showing that our method estimates the ground state energy with high precision under gate noise with low mitigation overhead and practical sampling cost. Copyright © 2023, The Authors. All rights reserved.

关键词： Ground state

来源：评论

学校读者我要写书评

暂无评论

Interleukin-38-overexpressing adenovirus infection in dendritic cell-based treatment enhances immunotherapy for allergic asthma via inducing Foxp3⁺ regulatory T cells

引用

Biomedicine and Pharmacotherapy 2024年 181卷 117738-117738页

作者： Chuang, Hsiao-Chi Chang, Jer-Hwa Fan, Yen-Yi Hsieh, Chia-Ling Lee, Yueh-Lun School of Respiratory Therapy College of Medicine Taipei Medical University Taipei Taiwan Division of Pulmonary Medicine Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan Division of Pulmonary Medicine Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Pulmonary Research Center Wan Fang Hospital Taipei Medical University Taipei Taiwan Graduate Institute of Medical Sciences College of Medicine Taipei Medical University Taipei Taiwan The Ph.D. Program for Translational Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan Department of Microbiology and Immunology School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei Taiwan

Allergic asthma is a chronic disease tied to unusual immune reactions involving type 2 T helper (Th2) cells specific to allergens. Dendritic cells (DCs) play a crucial role in guiding T-cell responses. Regulatory T (Treg) cells have the ability to suppress effector T-cell responses, and interleukin (IL)-38 is involved in Treg cell differentiation. In this study, we explored impacts of IL-38 on the activation and function of DCs, and we then developed an IL-38-overexpressing adenovirus (Ad-IL38) to evaluate its effectiveness in treating allergic asthma in mice through the adaptive transfer of Ad-IL38-infected DCs (IL38-DCs). Treating lipopolysaccharide (LPS)-activated bone marrow-derived DCs with recombinant IL-38 reduced cluster of differentiation 80 (CD80), CD86, and major histocompatibility complex (MHC) II expressions and decreased IL-1β, IL-6, and tumor necrosis factor (TNF)-α while increasing IL-10 secretion. The simultaneous culture of these semi-mature DCs with allogeneic CD4⁺ T cells facilitated the production of Forkhead box protein P3-positive (Foxp3⁺) Treg cells. A transcriptomic analysis revealed downregulation of the Chil3, Inhba, and Ctgf genes that are crucial for regulating inflammatory responses and cytokine-mediated signaling pathways in IL-38-treated DCs. In an animal model of asthma, IL38-DC treatment effectively decreased levels of an ovalbumin (OVA)-specific immunoglobulin E (IgE) antibody in serum, attenuated the severity of airway hyperresponsiveness, reduced the production of Th2-type cytokines (IL-4, IL-5, and IL-13) and proinflammatory cytokines (IL-6 and TNF-α) in bronchoalveolar lavage fluid, lowered expressions of the Th2-related cytokines IL-25 and thymic stromal-derived lymphopoietin (TSLP) by lung epithelial cells, and mitigated airway inflammation. Notably, enhanced expression of Foxp3⁺ Treg cells was linked to increased mRNA levels of transforming growth factor (TGF)-β production in vivo. In conclus

关键词： Adenovirus Allergic asthma Dendritic cell Interleukin-38 T cell

来源：评论

学校读者我要写书评

暂无评论

Passive Sole Constraining Method to Stabilize 3D Passive Dynamic Walking 2019

Passive Sole Constraining Method to Stabilize 3D Passive Dyn...

引用

Proceedings of the 2019 2nd International Conference on Control and Robot technology

作者： Naoto Mizoguchi Kazuyuki Hyodo Sadayoshi Mikami Graduate School of Systems Information Science Future University Hakodate Hakodate Hokkaido Japan Department of Computer Science and Engineering Fukuoka Institute of Technology Fukuoka Japan Department of Complex and Intelligent Systems Future University Hakodate Hakodate Hokkaido Japan

ISBN: (纸本)9781450372527

Inspired by the function of a toe and a lateral arch of a human foot, we propose a method to stabilize the biped walk by attaching unactuated toes and lateral arches. The toes and lateral arches work as adaptive braking of sagittal and lateral directions. They touch on the ground at the angle where the biped exceedingly inclines. After touching on the floor, the center of rotation changes at the landing positions. This change causes the reduction of the exceeding angular velocities toward sagittal and lateral directions. By setting appropriate heights of the toe and lateral arch during the swing phase, the walking robot is expected to be stabilized. To analyze the effects of the toe, we derived equations of motions and the state transition functions for a simplified 3D passive dynamic walker with toes. We clarified the potential stabilizing effect of the method from numerical simulations and preliminary experiments by a real-world biped with toes. Note that the proper setting of heights and the verification of the effect of lateral arches are on the way.

关键词： passive dynamic walk foot walk biped toe stability equations of motion

来源：评论

学校读者我要写书评

暂无评论

YAP-regulated type II alveolar epithelial cell differentiation mediated by human umbilical cord-derived mesenchymal stem cells in acute respiratory distress syndrome

引用

Biomedicine and Pharmacotherapy 2023年第1期159卷 114302-114302页

作者： Chen, Xiao-Yue Chen, Kuan-Yuan Feng, Po-Hao Lee, Kang-Yun Fang, Yu-Ting Chen, You-Yin Lo, Yu-Chun Bhavsar, Pankaj K. Chung, Kian Fan Chuang, Hsiao-Chi Graduate Institute of Medical Sciences College of Medicine Taipei Medical University Taipei Taiwan School of Respiratory Therapy College of Medicine Taipei Medical University Taipei Taiwan National Heart and Lung Institute Imperial College London London United Kingdom Division of Pulmonary Medicine Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei City Taiwan Division of Pulmonary Medicine Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan Department of Biomedical Engineering National Yang Ming Chiao Tung University Taipei Taiwan The Ph.D. Program for Neural Regenerative Medicine College of Medical Science and Technology Taipei Medical University Taipei Taiwan Industrial Ph.D. Program of Biomedical Science and Engineering National Yang Ming Chiao Tung University Taipei Taiwan Cell Physiology and Molecular Image Research Center Wan Fang Hospital Taipei Medical University Taipei Taiwan

Acute respiratory distress syndrome (ARDS) contributes to higher mortality worldwide. Human umbilical cord-derived mesenchymal stem cells (hUC-MSCs) have immunomodulatory and regenerative potential. However, the effects of hUC-MSCs as an ARDS treatment remain unclear. We investigated the role of hUC-MSCs in the differentiation of type II alveolar epithelial cells (AECII) by regulating Yes-associated protein (YAP) in ARDS. Male C57BL/6JNarl mice were intratracheally (i.t.) administered lipopolysaccharide (LPS) to induce an ARDS model, followed by a single intravenous (i.v.) dose of hUC-MSCs. hUC-MSCs improved pulmonary function, decreased inflammation on day 3, and mitigated lung injury by reducing the lung injury score and increasing lung aeration (%) in mice on day 7 (p < 0.05). hUC-MSCs inactivated YAP on AECII and facilitated cell differentiation by decreasing Pro-surfactant protein C (Pro-SPC) and galectin 3 (LGALS3) while increasing podoplanin (T1α) in lungs of mice (p < 0.05). In AECII MLE-12 cells, both coculture with hUC-MSCs after LPS exposure and the YAP inhibitor, verteporfin, reduced Pro-SPC and LGALS3, whereas the YAP inhibitor increased T1α expression (p < 0.05). In conclusion, hUC-MSCs ameliorated lung injury of ARDS and regulated YAP to facilitate AECII differentiation. © 2023 The Authors

关键词： Alveoli Inflammation Pneumocytes Regeneration Stem cells

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：