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MyWAL: performance optimization by removing redundant input/output stack in key-value store Research Article

Xiao ZHANG, Mengyu LI, Michael NGULUBE, Yonghao CHEN, Yiping ZHAO,zhangxiao@nwpu.edu.cn,limy@mail.nwpu.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 7,   Pages 980-993 doi: 10.1631/FITEE.2200496

Abstract: the data writing performance of RocksDB compared to the traditional WAL for small KV data on solid-stateOn non-volatile memory express soild-state drives (NVMe SSDs) and , MyWAL can improve data writing performance

Keywords： Key-value (KV) store     Log-structured merge (LSM) tree     Non-volatile memory (NVM)     Non-volatile memoryexpress soild-state drive (NVMe SSD)     Write-ahead log (WAL)    

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Versionized process based on non-volatile random-access memory for fine-grained fault tolerance None

Wen-zhe ZHANG, Kai LU, Xiao-ping WANG

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2,   Pages 192-205 doi: 10.1631/FITEE.1601477

Abstract: Non-volatile random-access memory (NVRAM) technology is maturing rapidly and its byte-persistence featurepaper we propose the versionized process (VerP), a new process model based on NVRAM that is natively non-volatileversion number can effectively help us trace the modification of any data and recover it to a consistent state

Keywords： Non-volatile memory     Byte-persistence     Versionized process     Version number    

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Anovel non-volatile memory storage system for I/O-intensive applications None

Wen-bing HAN, Xiao-gang CHEN, Shun-fen LI, Ge-zi LI, Zhi-tang SONG, Da-gang LI, Shi-yan CHEN

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 10,   Pages 1291-1302 doi: 10.1631/FITEE.1700061

Abstract: On one hand, ISPFS takes full advantage of non-volatile memory (NVM)’s characteristics, and reduces software

Keywords： In-storage processing     File system     Non-volatile memory (NVM)     Storage system     I/O-intensive applications    

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& Research Article

Yitian YANG, Youyou LU,yangyiti22@mails.tsinghua.edu.cn,luyouyou@tsinghua.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5,   Pages 675-687 doi: 10.1631/FITEE.2200469

Abstract: Emergence of new hardware, including and , has brought new opportunities to design. In this paper, we design and implement a new named NICFS based on and SmartNIC. We divide the into two parts: the front end and the back end. In the front end, data writes are appended to the in a log-structured way, leveraging the fast persistence advantage of . In the back end, the data in logs are fetched, processed, and patched to files in the background, leveraging the processing capacity of SmartNIC. Evaluation results show that NICFS outperforms Ext4 by about 21%/10% and about 19%/50% on large and small reads/writes, respectively.

Keywords： Non-volatile memory     Persistent memory     Data processing unit     Smart network interface card (SmartNIC)    

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Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 411-426 doi: 10.1007/s11465-018-0467-0

Abstract:

A new type of traction drive system consisting of solid-state traction transformer (SSTT), inverter

Keywords： solid-state traction transformer     high-voltage cascaded rectifier     LLC resonant converter     synchronous rotating    

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An efficient wear-leveling-aware multi-grained allocator for persistent memory file systems Research Article

Tao CAI, Pengfei GAO, Dejiao NIU, Yueming MA, Tianle LEI, Jianfei DAI,caitao@ujs.edu.cn,1306943800@qq.com

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5,   Pages 703-715 doi: 10.1631/FITEE.2200462

Abstract: is an effective way to manage increasingly large file system metadata, but it suffers from low concurrency and lack of optimization for . In this paper, a multilevel hash directory based on lazy expansion is designed to improve the concurrency and efficiency of , and a hash bucket management algorithm based on groups is presented to improve the efficiency of hash key management by reducing the size of the hash bucket, thereby improving the performance of . Meanwhile, a hierarchical storage strategy of for NVM is given to take advantage of dynamic random access memory (DRAM) and NVM. Furthermore, on the basis of the device driver for Intel Optane DC Persistent Memory, the prototype of high-concurrency named NEHASH is implemented. Yahoo cloud serving benchmark (YCSB) is used to test and compare with CCEH, level hashing, and cuckoo hashing. The results show that NEHASH can improve read throughput by up to 16.5% and write throughput by 19.3%.

Keywords： Extendible hashing     Non-volatile memory (NVM)     High concurrency    

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NEHASH: high-concurrency extendible hashing for non-volatile memory Research Article

Qiankun WANG, Xingchen LI, Bingzhe WU, Ke YANG, Wei HU, Guangyu SUN, Yuchao YANG,gsun@pku.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 5,   Pages 731-741 doi: 10.1631/FITEE.2200463

Abstract: The problem (COP), which aims to find the optimal solution in discrete space, is fundamental in various fields. Unfortunately, many COPs are NP-complete, and require much more time to solve as the problem scale increases. Troubled by this, researchers may prefer fast methods even if they are not exact, so approximation algorithms, heuristic algorithms, and machine learning have been proposed. Some works proposed (CSA) based on the Hopfield neural network and did a good job. However, CSA is not something that current general-purpose processors can handle easily, and there is no special hardware for it. To efficiently perform CSA, we propose a software and hardware co-design. In software, we quantize the weight and output using appropriate bit widths, and then modify the calculations that are not suitable for hardware implementation. In hardware, we design a specialized hardware architecture named COPPER based on the memristor. COPPER is capable of efficiently running the modified quantized CSA algorithm and supporting the pipeline further acceleration. The results show that COPPER can perform CSA remarkably well in both speed and energy.

Keywords： Combinatorial optimization     Chaotic simulated annealing     Processing-in-memory    

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A review on application of dielectric barrier discharge plasma technology on the abatement of volatile

Wenjing Lu, Yawar Abbas, Muhammad Farooq Mustafa, Chao Pan, Hongtao Wang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1108-5

Abstract:

• Applications of non-thermal plasma reactors for reduction of VOCs

Keywords： Non-thermal plasma (NTP)     Dielectric barrier discharge (DBD)     Volatile organic compounds (VOCs)     Abatement    

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Benzene conversion by manganese dioxide assisted silent discharge plasma

LU Bin, JI Min, YU Xin, FENG Tao, YAO Shuiliang

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 477-481 doi: 10.1007/s11783-007-0076-3

Abstract: Non-thermal plasma technologies have shown their promising potential specially for the low concentrationof volatile organic compound control in indoor air in recent years.

Keywords： consuming     Non-thermal     promising     volatile     compound    

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Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 3,   Pages 329-353 doi: 10.1007/s11465-018-0466-1

Abstract: EMI) causes electromechanical damage to the motors and degrades the reliability of variable-frequency driveUnlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled with

Keywords： variable-frequency drive (VFD)     electromagnetic interference (EMI)     motor drive modeling     EMI noise suppression    

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CROP-LIVESTOCK INTEGRATION FOR SUSTAINABLE AGRICULTURE IN CHINA: THE HISTORY OF STATE POLICY GOALS, REFORM

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 4,   Pages 518-529 doi: 10.15302/J-FASE-2023525

Abstract: historical evolution of crop-livestock integration in China with a specific focus on its role in mitigating non-point

Keywords： crop-livestock integration     non-point source pollution control     nutrient cycling     policy intervention    

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A Non-Contact Original-State Online Real-Time Monitoring Method for Complex Liquids in Industrial Processes Article

Ning Duan, Linhua Jiang, Fuyuan Xu, Ge Zhang

Engineering 2018, Volume 4, Issue 3,   Pages 392-397 doi: 10.1016/j.eng.2018.05.005

Abstract: In this study, we introduce a monitoring method capable of non-contact original-state online real-time

Keywords： Complex liquid     Original-state monitoring     Online real-time     Non-contact identification    

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Power control of dual-motor electric drive for tracked vehicles

Yuan ZOU, Chengning ZHANG, Fengchun SUN, Jingbo WU,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 1,   Pages 67-72 doi: 10.1007/s11465-009-0059-0

Abstract: The fundamental problem of the power control for the driving of a dual-motor drive electric tracked vehicleThe tracked vehicle and its electric drive system are mathematically modeled.Power control schemes of the dual-motor drive system is put forward, designed, and analyzed, includingThe field experiment shows that the two types of drive control schemes realize the driving function of

Keywords： control     electric drive     tracked vehicle    

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An investigation into the vibration of harmonic drive systems

M. Masoumi, H. Alimohammadi

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 409-419 doi: 10.1007/s11465-013-0275-5

Abstract:

Harmonic drive systems are precise and specific transmission gear systems which are beneficial inThis paper presents a vibration analysis of harmonic drive systems using the shell theory.

Keywords： harmonic drive system     strain wave gearing mechanism     vibration analysis     natural frequencies    

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SCRaMbLE drive application of synthetic yeast genome

Jin Jin, Yuan Ma, Duo Liu

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 4,   Pages 832-834 doi: 10.1007/s11705-018-1749-0

Abstract:
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Title Author Date Type Operation

MyWAL: performance optimization by removing redundant input/output stack in key-value store

Xiao ZHANG, Mengyu LI, Michael NGULUBE, Yonghao CHEN, Yiping ZHAO,zhangxiao@nwpu.edu.cn,limy@mail.nwpu.edu.cn

Journal Article

Versionized process based on non-volatile random-access memory for fine-grained fault tolerance

Wen-zhe ZHANG, Kai LU, Xiao-ping WANG

Journal Article

Anovel non-volatile memory storage system for I/O-intensive applications

Wen-bing HAN, Xiao-gang CHEN, Shun-fen LI, Ge-zi LI, Zhi-tang SONG, Da-gang LI, Shi-yan CHEN

Journal Article

&

Yitian YANG, Youyou LU,yangyiti22@mails.tsinghua.edu.cn,luyouyou@tsinghua.edu.cn

Journal Article

Solid-state transformer-based new traction drive system and control

Jianghua FENG, Jing SHANG, Zhixue ZHANG, Huadong LIU, Zihao HUANG

Journal Article

An efficient wear-leveling-aware multi-grained allocator for persistent memory file systems

Tao CAI, Pengfei GAO, Dejiao NIU, Yueming MA, Tianle LEI, Jianfei DAI,caitao@ujs.edu.cn,1306943800@qq.com

Journal Article

NEHASH: high-concurrency extendible hashing for non-volatile memory

Qiankun WANG, Xingchen LI, Bingzhe WU, Ke YANG, Wei HU, Guangyu SUN, Yuchao YANG,gsun@pku.edu.cn

Journal Article

A review on application of dielectric barrier discharge plasma technology on the abatement of volatile

Wenjing Lu, Yawar Abbas, Muhammad Farooq Mustafa, Chao Pan, Hongtao Wang

Journal Article

Benzene conversion by manganese dioxide assisted silent discharge plasma

LU Bin, JI Min, YU Xin, FENG Tao, YAO Shuiliang

Journal Article

Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems

Le YANG, Shuo WANG, Jianghua FENG

Journal Article

CROP-LIVESTOCK INTEGRATION FOR SUSTAINABLE AGRICULTURE IN CHINA: THE HISTORY OF STATE POLICY GOALS, REFORM

Journal Article

A Non-Contact Original-State Online Real-Time Monitoring Method for Complex Liquids in Industrial Processes

Ning Duan, Linhua Jiang, Fuyuan Xu, Ge Zhang

Journal Article

Power control of dual-motor electric drive for tracked vehicles

Yuan ZOU, Chengning ZHANG, Fengchun SUN, Jingbo WU,

Journal Article

An investigation into the vibration of harmonic drive systems

M. Masoumi, H. Alimohammadi

Journal Article

SCRaMbLE drive application of synthetic yeast genome

Jin Jin, Yuan Ma, Duo Liu

Journal Article