Article
Computer Science, Information Systems
Yuchen Zhang, Xiao Zhang, Jinyang Yu, Yulong Shi, Linxuan Su
Summary: This paper presents a generic method and two metrics to measure the performance fluctuations of a distributed file system. By analyzing the IO path and identifying factors such as storage media, network, configurations, and software components, as well as making adjustments to software configurations and components, performance fluctuations can be reduced.
CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS
(2023)
Article
Computer Science, Information Systems
Jungbin Kim, Hyeon-Jin Yu, Hyeongbin Kang, Jae-Hyuck Shin, Heeseok Jeong, Seo-Young Noh
Summary: Tape storage is widely used for long-term data storage, but it requires complex management and is less cost-effective compared to other storage media. Distributed file systems have become an alternative option due to their cost-effectiveness and reliability.
Article
Engineering, Electrical & Electronic
Zhonghua Hong, Bin Tu, Xiaohua Tong, Haiyan Pan, Ruyan Zhou, Yun Zhang, Yanling Han, Jing Wang, Shuhu Yang, Zhenling Ma
Summary: This article proposes a fast path-planning method using a distributed tile pyramid strategy and an improved A* algorithm. The method consists of three steps: generating a tile pyramid for a large lunar DEM, using a distributed path-planning strategy based on the tile pyramid to accelerate path-planning tasks on large-scale lunar DEMs, and proposing an improved A* algorithm to improve the speed of path-planning tasks in each tile. Experimental results show that the proposed method is significantly faster than traditional algorithms and distributed parallel computation strategies.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2023)
Article
Computer Science, Hardware & Architecture
Rong Gu, Chongjie Li, Haipeng Dai, Yili Luo, Xiaolong Xu, Shaohua Wan, Yihua Huang
Summary: This paper proposes a two-layer user space cache management mechanism for improving the performance of distributed in-memory file systems. Experimental results show that the proposed caching strategies can significantly enhance reading performance and outperform existing cache algorithms. The idea of the client-side caching framework has been adopted by the Alluxio open source community, demonstrating practical benefits.
JOURNAL OF SYSTEMS ARCHITECTURE
(2021)
Article
Computer Science, Theory & Methods
Yanlong Zhai, Jude Tchaye-Kondi, Kwei-Jay Lin, Liehuang Zhu, Wenjun Tao, Xiaojiang Du, Mohsen Guizani
Summary: This paper introduces a new archive file named Hadoop Perfect File (HPF), which minimizes access overheads by directly accessing metadata from the index file. It improves the access efficiency from archive files.
JOURNAL OF PARALLEL AND DISTRIBUTED COMPUTING
(2021)
Article
Operations Research & Management Science
R. Dhaya, R. Kanthavel, Kanagaraj Venusamy
Summary: Private cloud computing offers flexibility and cost reduction, but also brings risks and weaknesses. The prevalence of private cloud computing has not reached expectations, as corporations face problems in fully embracing it, including increasing privacy issues. This paper compares a new authentication scheme with existing ones and demonstrates its success. Additionally, a novel private cloud storage system is developed, incorporating techniques such as differential fragments and distributed file allocation databases.
ANNALS OF OPERATIONS RESEARCH
(2023)
Article
Computer Science, Information Systems
Nilesh Vishwasrao Patil, C. Rama Krishna, Krishan Kumar, Sunny Behal
Summary: With the increase in traffic volume, traditional DDoS defense architectures are unable to detect high rate attacks in time. This paper proposes a distributed and collaborative architecture called E-Had, which efficiently processes large amounts of data by distributing it among multiple mappers and reducers, enabling early detection of DDoS attacks.
JOURNAL OF KING SAUD UNIVERSITY-COMPUTER AND INFORMATION SCIENCES
(2022)
Article
Multidisciplinary Sciences
Praveen Devadhas Sujakumari, Paulraj Dassan
Summary: The most crucial component of any smart city traffic management system is traffic flow prediction, which can assist drivers in selecting the most efficient route. The digitalization of CCTV systems has improved surveillance imaging systems for security applications. The increase in the number of automobiles has led to growing congestion, and adaptive traffic management is chosen to address this issue.
Article
Computer Science, Information Systems
Anusha Nalajala, Thirumalaisamy Ragunathan, Ranesh Naha
Summary: This paper proposes novel prefetching and multi-level caching algorithms based on the Access-Frequency and Access-Recency ranking, aiming to improve the performance of read operations in distributed file systems. The simulation results demonstrate that these algorithms achieve a performance improvement of 29% to 77% compared to the algorithms proposed in previous literature.
Article
Computer Science, Information Systems
Ryan Nathanael Soenjoto Widodo, Hirotake Abe, Kazuhiko Kato
Summary: Big data processing systems like Hadoop often use distributed file systems (DFS) and require data reduction schemes for efficient storage. Existing software may not cover all data types, so this paper suggests a modular DFS design to simplify scheme usage. The proposed approach allows easy addition of new schemes, requires minimal modification to current DFS, and enables separate compilation of schemes without needing the source code of the DFS or FS.
Article
Computer Science, Information Systems
Jiashu Wu, Jingpan Xiong, Hao Dai, Yang Wang, Chengzhong Xu
Summary: With the deployment of satellite technologies, a large volume of Remote Sensing (RS) data has been generated, which is crucial for ecological monitoring, land management, and desertification research. However, the efficiency of constructing and leveraging geospatial indices is hampered by the enormous data volume. To address this issue and improve efficiency, researchers have designed a framework called Multi-IndeXing-RS (MIX-RS) that unifies multiple indexing mechanisms on top of the Hadoop Distributed File System (HDFS). This framework enables faster geospatial indexing while ensuring fault tolerance.
TSINGHUA SCIENCE AND TECHNOLOGY
(2022)
Article
Computer Science, Theory & Methods
Sunggon Kim, Alex Sim, Kesheng Wu, Suren Byna, Yongseok Son
Summary: Large-scale high performance computing (HPC) systems with diverse user applications require a good understanding of their performance characteristics, including I/O performance. However, predicting I/O performance is challenging due to shared I/O systems and the complex software and hardware stack involved. To address this, we propose integrating information from multiple system logs and developing a regression-based approach for accurate I/O performance prediction on HPC systems. Our evaluation shows promising results with up to 90% accuracy for write performance and up to 99% accuracy for read performance using real logs from the Cori supercomputer system at NERSC.
JOURNAL OF BIG DATA
(2023)
Article
Computer Science, Information Systems
Mansub Song, Jongbeen Han, Hyeonsang Eom, Yongseok Son
Summary: IPFS is a P2P distributed file system that aims to replace existing centralized system protocols for better performance and storage space savings. IPFSz is an improved data transmission scheme for IPFS, which enhances I/O performance through real-time compression functionality.
Article
Computer Science, Information Systems
Yordan Kalmukov, Milko Marinov, Tsvetelina Mladenova, Irena Valova
Summary: In the era of big data, the use of distributed systems like Hadoop is becoming increasingly important. This research aims to experimentally explore the factors influencing the performance of HDFS read/write operations.
TEM JOURNAL-TECHNOLOGY EDUCATION MANAGEMENT INFORMATICS
(2021)
Article
Chemistry, Multidisciplinary
Mingshuo Wei, Xiao Li, Weiliang Xie, Chunlei Hu
Summary: The 5G network is rapidly developing, but due to spectrum resource limitation, it is necessary to implement dynamic spectrum-sharing (DSS) technology to enable coexistence of 4G and 5G networks in the same band. However, this DSS technology can introduce intra-frequency interference, affecting network performance. To address this issue, two interference mitigation schemes, buffer setting and rate matching, were proposed and their practical performance was verified. These schemes effectively mitigate the interference introduced by DSS, improving network rate and user experience in the DSS architecture.
APPLIED SCIENCES-BASEL
(2023)
Article
Biochemistry & Molecular Biology
Yangyang Cai, Dezhong Lv, Donghao Li, Jiaqi Yin, Yingying Ma, Ya Luo, Limei Fu, Na Ding, Yongsheng Li, Zhenwei Pan, Xia Li, Juan Xu
Summary: IEAtlas is a valuable resource for investigating the immunogenic capacity of non-canonical epitopes and their potential as therapeutic cancer vaccines.
NUCLEIC ACIDS RESEARCH
(2023)
Article
Medicine, Research & Experimental
Zan-Xiong Chen, Hong-Qian Liu, Zhen-Hua Wu, Jun-Lian He, Hao-Jie Zhong
Summary: This study found that the frequency of circulating ILC3s is elevated in patients with HUA and is positively correlated with serum uric acid and creatinine levels. Although there is no significant difference in plasma IL-17A concentration between HUA patients and healthy controls, positive correlations between plasma IL-17A and serum uric acid levels and circulating ILC3 frequency were observed in HUA patients.
ADVANCES IN CLINICAL AND EXPERIMENTAL MEDICINE
(2023)
Letter
Otorhinolaryngology
Thomas J. Lepley, Zhenxing Wu, Zachary T. Root, Barak M. Spector, Robbie J. Chapman, Aspen R. Schneller, Kathleen Kelly, Bradley A. Otto, Kai Zhao
INTERNATIONAL FORUM OF ALLERGY & RHINOLOGY
(2023)
Article
Rheumatology
Yang Hu, Rui-Chen Gao, Ni Sang, Li Wu, Pei-Li Shi, Guo-Cui Wu
Summary: Self-disclosure may enhance positive illness perceptions. Social support, drinking, and depression are influential factors for self-disclosure in patients with systemic lupus erythematosus (SLE). Self-disclosure is positively correlated with quality of life, except for physical health and fatigue.
Article
Mechanics
Zhenqi Nie, Huiheng Wang, Bin Lu, Fan Zhang, Mingbo Wang, Zhenhua Wu, Xianyue Gang, Lijun Li
Summary: Currently, the leveling of aerial working platforms is conducted manually, leading to issues such as low accuracy, low efficiency, poor robustness, and poor adaptability. To address this, a battery-electric drive-electric control integrated aerial working chassis is proposed, along with an attitude and load coupling control model designed by the team. Performance tests show that the chassis and control system can rapidly and synchronously achieve the leveling and load homogenization of the chassis, indicating potential for being promoted as special vehicles with leveling requirements.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Chemistry, Physical
Guanghui Li, Fengman Liu, Shengyi Yang, Jiang-Tao Liu, Weimin Li, Zhenhua Wu
Summary: The micro-electromechanical-system (MEMS) force and acceleration sensor, based on the graphene-induced non-radiative transition, was investigated using analytical solution and finite element analysis methods. The sensor can detect the deflection of the graphene ribbon, applied force, and acceleration with high sensitivity. With its small size and ability to be charged by light irradiation, the MEMS sensor has significant application prospects in the fields of micro-smart devices, wearable devices, and biomedical systems.
Correction
Multidisciplinary Sciences
Robert. D. D. Bell, Ethan. A. A. Winkler, Itender Singh, Abhay. P. P. Sagare, Rashid Deane, Zhenhua Wu, David. M. M. Holtzman, Christer Betsholtz, Annika Armulik, Jan Sallstrom, Bradford. C. C. Berk, Berislav. V. V. Zlokovic
Article
Optics
Shaojie Chang, Zhenhua Wu, Diwei Liu, Renbin Zhong, Zhaoyun Duan, Yanyu Wei, Yubin Gong, Min Hu
Summary: In this study, we propose a novel approach to enhance the second harmonic of electron beams and increase the output power at higher frequencies. By using a planar grating for fundamental modulation and a transmission grating for harmonic coupling, the proposed structure achieves a high power output of the second harmonic signal. Computational investigations demonstrate that this configuration can generate a 0.202 THz signal with an output power of 4.59 W at an electron beam density of 50 A/cm2 and a voltage of 31.5 kV. The reduced current density in the G-band has significant implications for the advancement of terahertz vacuum devices.
Article
Optics
Yanli Xu, Shengyi Yang, Rong Li, Shanjin Lv, Zhenhua Wu, Jiangtao Liu
Summary: Most UV passive optics lack tunability and external modulation methods due to poor tunability of wide-bandgap semiconductor materials in UV working media. This study explores the excitation of magnetic dipole resonances in the solar-blind UV region using hafnium oxide metasurfaces and elastic dielectric polydimethylsiloxane (PDMS). The near-field interactions between the resonant dielectric elements can be modulated by mechanical strain of the PDMS substrate, enabling the flattening of resonant peak beyond the solar-blind UV wavelength range and switching on or off the optical switch in the solar-blind UV region. The device offers a simple design and can be applied in UV polarization modulation, optical communications, and spectroscopy.
Article
Plant Sciences
Zhenhua Wu, Yunpeng Bai, Yujuan Qi, Chao Chang, Yan Jiao, Yaobang Bai, Zhigang Guo
Summary: This study found that metformin has a protective effect against ferroptosis in cardiac ischemia and reperfusion (I/R) injury.
PHARMACEUTICAL BIOLOGY
(2023)
Article
Plant Sciences
Xiangling Wang, Baiquan Song, Zhenzhen Wu, Xiaoyu Zhao, Xin Song, Muhammad Faheem Adil, Muhammad Riaz, Milan Kumar Lal, Wengong Huang
Summary: The study focuses on understanding the physiological and molecular mechanisms underlying the tolerance of sugar beet varieties to boron deficiency. The results show that B-efficient varieties are able to absorb and utilize sufficient boron through the up-regulation of specific genes and the activation of antioxidant enzyme systems, thereby maintaining a superior cellular structure and promoting root development.
PLANT PHYSIOLOGY AND BIOCHEMISTRY
(2023)
Review
Nanoscience & Nanotechnology
Yuhui Tian, Daijie Deng, Li Xu, Meng Li, Hao Chen, Zhenzhen Wu, Shanqing Zhang
Summary: A sustainable and cost-effective production of H2O2 via electrochemical oxygen reduction reaction is highly desired for various applications. Significant progress has been made in catalyst design and innovative cell designs for electrocatalytic production of H2O2. This review summarizes recent advances, including mechanistic explorations, theoretical computations, experimental evaluations, and perspectives on addressing remaining challenges.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Mengting Zheng, Juncheng Wang, Shangshu Qian, Qiang Sun, Hao Chen, Liang Zhang, Zhenzhen Wu, Shanqing Zhang, Tiefeng Liu
Summary: A one-step water-based recycling process is proposed to recycle and regenerate graphite anode materials from spent lithium-ion batteries (LIBs). The regenerated graphite with expanded interlayer spacing and oxygen-containing groups exhibits excellent performance in graphite dual-ion batteries (GDIBs). This waste-to-resource strategy provides a low-cost and sustainable recycling pathway for spent LIBs and enables the sustainable manufacturing of GDIBs.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Plant Sciences
Xiaopei Wu, Lu Zhang, Xiuyun Wang, Rengang Zhang, Guihua Jin, Yanting Hu, Hong Yang, Zhenzhen Wu, Yongpeng Ma, Chengjun Zhang, Jihua Wang
Summary: Researchers have constructed chromosome-scale genome assemblies for two species of Rhododendron and conducted phylogenetic and whole-genome duplication analyses. They have also investigated gene duplication and gene family expansion, as well as conducted evolutionary analysis of specific genes involved in secondary metabolite biosynthesis and stress response. The results provide important genetic resources for molecular breeding and genetic improvement of economically important plants in the Rhododendron genus.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Agronomy
Xiaoyu Zhao, Baiquan Song, Muhammad Ishfaq, Muhammad Faheem Adil, Milan Kumar Lal, Zhenzhen Wu, Qiue Jia, Wengong Huang
Summary: The application of zinc fertilizer has a significant impact on the yield and quality of sugar beet roots in black and albic soils in Northeast China. The addition of 30 kg/ha of zinc fertilizer can increase the dry matter accumulation, sugar content, and sugar yield of sugar beet roots. These findings have important implications for nutrient management in sugar beet planting and the sustainable development of the sugar industry.
FIELD CROPS RESEARCH
(2023)