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Multi-stage dual replica bit-line delay technique for process-variation-robust timing of lowvoltageSRAMsense amplifier

Shou-biao TAN,Wen-juan LU,Chun-yu PENG,Zheng-ping LI,You-wu TAO,Jun-ning CHEN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 8,   Pages 700-706 doi: 10.1631/FITEE.1400439

Abstract: dual replica bit-line delay (MDRBD) technique is proposed for reducing access time by suppressing the sense-amplifier

Keywords： Process-variation-robust     Sense amplifier (SA)     Replica bit-line (RBL) delay     Timing variation    

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Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 1,   Pages 35-43 doi: 10.1007/s11709-012-0142-1

Abstract: This paper presents the application of a methodology which can be used to assess arch dam foundation stability, using the discrete element method (DEM) and the code 3DEC. A global three-dimensional model of a dam foundation was developed, in which some discontinuities were simulated and both the grout and drainage curtains were represented. The model, calibrated taking into account recorded data, was used to carry out nonlinear mechanical analysis. The same model was employed to perform a hydraulic analysis, based on equivalent continuum concepts, which allowed the water pressure pattern within the foundation to be obtained. These water pressures were applied on discontinuities involved in the possible sliding mechanism along the dam/foundation interface, and the safety of the dam/foundation system was evaluated using a process of reduction of strength characteristics, with the aim of calculating the minimum safety factors that ensure stability. Results were compared with those obtained with the usual bi-linear uplift pressure distribution at the base of the dam, commonly used in concrete dam design. The relevance of carrying out hydraulic analysis in arch dam foundation failure studies is highlighted.

Keywords： concrete dams     rock foundations     hydromechanical behavior     failure analysis    

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A simple multi-wave algorithm for the uncapacitated facility location problem

Fred GLOVER, Saïd HANAFI, Oualid GUEMRI, Igor CREVITS

Frontiers of Engineering Management 2018, Volume 5, Issue 4,   Pages 451-465 doi: 10.15302/J-FEM-2018038

Abstract:

The multi-wave algorithm (Glover, 2016) integrates tabu search and strategic oscillation utilizing repeated waves (nested iterations) of constructive search or neighborhood search. We propose a simple multi-wave algorithm for solving the Uncapacitated Facility Location Problem (UFLP) to minimize the combined costs of selecting facilities to be opened and of assigning each customer to an opened facility in order to meet the customers’ demands. The objective is to minimize the overall cost including the costs of opening facilities and the costs of allocations. Our experimental tests on a standard set of benchmarks for this widely-studied class of problems show that our algorithm outperforms all previous methods.

Keywords： discrete optimization     UFLP     multi-wave optimization     strategic oscillation     tabu search    

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High linearity U-band power amplifier design: a novel intermodulation point analysis method Research Article

Jie CUI, Peipei LI, Weixing SHENG,cuijie@njust.edu.cn

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 1,   Pages 176-186 doi: 10.1631/FITEE.2200082

Abstract: The amplifier achieves a higher than 23 dBm and a maximum PAE higher than 25% in the measured bandwidth

Keywords： CMOS silicon-on-insulator (SOI)     Linearity analysis     Milimeter wave (mm-Wave)     Power amplifier    

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Synthesis of spherical parallel manipulator for dexterous medical task

Abdelbadia CHAKER, Abdelfattah MLIKA, Med Amine LARIBI, Lotfi ROMDHANE, Sa?d ZEGHLOUL

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 150-162 doi: 10.1007/s11465-012-0325-4

Abstract:

This paper deals with the design and the analysis of a spherical parallel manipulator (SPM) for a haptic minimally invasive surgery application. First the medical task was characterized with the help of a surgeon who performed a suture technique called anastomosis. A Vicon system was used to capture the motion of the surgeon, which yielded the volume swept by the tool during the anastomosis operation. The identified workspace can be represented by a cone with a half vertex angle of 26°. A multi objective optimization procedure based on genetic algorithms was then carried out to find the optimal SPM. Two criteria were considered, i.e., task workspace and mechanism dexterity. The optimized SPM was then analyzed to determine the error on the orientation of the end effector as a function of the manufacturing errors of the different links of the mechanism.

Keywords： spherical parallel manipulator (SPM)     anastomosis     haptic     motion capture     optimization     workspace     dexterity     genetic algorithm     manufacturing errors    

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IEEE 802.16 Mesh Network SA Management Mechanism Based on Multi-hops Mutual Authentication

Wang Xingjian,Hu Aiqun,Huang Yuhua

Strategic Study of CAE 2006, Volume 8, Issue 9,   Pages 69-73

Abstract: Aimed at the weakness both in security and efficiency of one-hop one-way authentication SA (securityassociation) mechanism employed by Mesh network, an multi-hops mutual authentication SA mechanism associated

Keywords： IEEE 802.16     mesh     node     multi-hops mutual authentication     self-modified routing    

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Power system design for constant current subsea observatories Regular Article

Yan-hu Chen, Sa Xiao, De-jun Li,yanhuchen@zju.edu.cn,sxiao@zju.edu.cn,li_dejun@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 11,   Pages 1505-1515 doi: 10.1631/FITEE.1800362

Abstract: Constant current power transmission is considered a good choice for subsea observatories due to its high resistance to shunt faults. A constant current subsea is planned to be constructed in the East China Sea. We discuss a constant current subsea system used for scientific experiments. The power system and its system are carefully designed. The power conversion method is challenging due to the use of constant current power, which is considerably different from traditional power systems. Thus, we adopt power compensation circuits in the conversion system to obtain a constant 48-V output for science users. A power management system that performs overvoltage protection and real-time monitoring and control of junction box is discussed. An innovative structure of a junction box is designed in consideration of a sealed working environment to extend the useful life of the junction box. Simulations and experiments reveal that the system has high efficiency and stability, especially in long-term applications.

Keywords： 海底观测网；电能变换；散热    

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Magnetic-porous microspheres with synergistic catalytic activity of small-sized gold nanoparticles and titania matrix

Kadriye Özlem Hamaloğlu, Ebru Sağ, Çiğdem Kip, Erhan Şenlik, Berna Saraço

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 3,   Pages 574-585 doi: 10.1007/s11705-019-1799-y

Abstract: Fe O nanoparticles immobilized on porous titania in micron-size range were decorated with small-sized gold nanoparticles and used as a plasmonic catalyst for the reduction of 4-nitrophenol. Monodisperse-porous magnetic titania microspheres were synthesized with bimodal pore-size distribution by the sol-gel templating method. Small-sized gold nanoparticles obtained by the Martin method were attached onto the aminated form of the magnetic titania microspheres. A significant enhancement in the catalytic activity was observed using the gold nanoparticle-decorated magnetic titania microspheres compared to gold nanoparticle-decorated magnetic silica microspheres because of the synergistic effect between small-sized gold nanoparticles and titania. The synergistic effect for gold nanoparticle-attached magnetic titania microspheres could be explained by surface plasmon resonance-induced transfer of hot electrons from gold nanoparticles to the conduction band of titania. Using the proposed catalyst, 4-nitrophenol could be converted to 4-aminophenol in an aqueous solution within 0.5 min. The 4-nitrophenol reduction rates were 2.5–79.3 times higher than those obtained with similar plasmonic catalysts. The selection of micron-size, magnetic, and porous titania microspheres as a support material for the immobilization of small-sized gold nanoparticles provided a recoverable plasmonic catalyst with high reduction ability.

Keywords： small-sized gold nanoparticles     magnetic titania microspheres     sol-gel template synthesis     plasmonic catalysis     4-nitrophenol    

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Polynomial robust observer implementation based passive synchronization of nonlinear fractional-order systems with structural disturbances

Ahmad Taher Azar, Hilaire Bertrand Fotsin, Soup Teoua Michael Ouagni,kouaneteoua@yahoo.fr,aazar@psu.edu.sa

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 9,   Pages 1267-1412 doi: 10.1631/FITEE.1900430

Abstract: A robust polynomial observer is designed based on passive synchronization of a given class of r Colpitts (FOC) systems with mismatched uncertainties and disturbances. The primary objective of the proposed observer is to minimize the effects of unknown bounded disturbances on the estimation of errors. A more practicable output-feedback passive controller is proposed using an adaptive polynomial state observer. The distributed approach of a continuous frequency of the FOC is considered to analyze the stability of the observer. Then we derive some stringent conditions for the robust passive synchronization using Finsler’s lemma based on the fractional Lyapunov stability theory. It is shown that the proposed method not only guarantees the asymptotic stability of the controller but also allows the derived adaptation law to remove the uncertainties within the nonlinear plant’s dynamics. The entire system using passivity is implemented with details in PSpice to demonstrate the feasibility of the proposed control scheme. The results of this research are illustrated using computer simulations for the control problem of the r chaotic Colpitts system. The proposed approach depicts an efficient and systematic control procedure for a large class of nonlinear systems with the fractional derivative.
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A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier Research Article

Mingyu LI, Xiaobing CHENG, Zhijiang DAI, Kang ZHONG, Tianfu CAI, Chaoyi HUANG

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 3,   Pages 470-479 doi: 10.1631/FITEE.2200250

Abstract: away from infinity and changing the phase delay of the output matching network of the carrier power amplifier

Keywords： Doherty power amplifier (DPA)     Output power back-off (OPBO)     Output impedance     Network phase    

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Experimental Study on the Piezoelectric Prestage Driver of Electrohydraulic Servo Valves

CHENG Guang-ming, SHEN Chuan-liang, YANG Zhi-gang

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 56-59 doi: 10.1007/s11465-005-0017-4

Abstract: The displacement of a piezoelectric multilayer actuator was amplified by a flexure-hinged amplifier based

Keywords： flexure-hinged amplifier     kHz     amplification     high-frequency     electromagnetic    

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New-Generation Quality and Safety Management of the Construction Industry

Xie Xianqi, Deng Liming, Xiao Mingzhao, Luo Hanbin, Fang Ruiwei

Strategic Study of CAE 2021, Volume 23, Issue 4,   Pages 71-78 doi: 10.15302/J-SSCAE-2021.04.008

Abstract:

Construction is a complex human–machine–environment system, and the quality and safety management during construction faces numerous challenges. As the new-generation information technology develops, digital twin now can be used in construction to improve the quality and safety management and promote smart construction in China. Computability and controllability of the whole construction process is expected to be achieved using the digital twin technology; digital management of construction sites can be realized using advanced sensing, computing, and other technologies. In this article, we first investigate the demand for the application of digital twin into the construction quality management and analyze the research status and problems of the application. Subsequently, we propose a next-generation construction quality and safety management system that is composed of product intelligent design for construction quality and safety control, intelligent sensing and analysis of construction quality and safety status, data-driven construction quality and safety control, and construction quality management and dynamic supervision. Furthermore, we propose suggestions for the application of digital twin technology in the construction industry in China from the aspects of management, technology, as well as standards and specifications.

Keywords： digital twin     quality and safety     smart construction     intelligent sense and analysis    

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SA-RSR: a read-optimal data recovery strategy for XOR-coded distributed storage systems Research Articles

Xingjun ZHANG, Ningjing LIANG, Yunfei LIU, Changjiang ZHANG, Yang LI

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 6,   Pages 858-875 doi: 10.1631/FITEE.2100242

Abstract: In this paper, we propose a random search recovery algorithm, named SA-RSR, to speed up recovery of .SA-RSR uses a simulated annealing technique to search for an optimal recovery solution that reads andWe evaluate SA-RSR with a variety of in simulations and in a real storage system, Ceph.Experimental results in Ceph show that SA-RSR reduces the amount of data required for recovery by up

Keywords： Distributed storage system     Data reliability and availability     XOR-based erasure codes     Single-node failure     Data recovery    

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Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in smart power grids

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Frontiers in Energy 2015, Volume 9, Issue 2,   Pages 148-161 doi: 10.1007/s11708-015-0344-z

Abstract: The proposed PMSSA is much faster than the conventional simulated annealing (SA) approach as it utilizes

Keywords： phasor measurement units (PMUs)     pragmatic PMU placement     simulated annealing (SA)     western region Indian    

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Multiple linear regression, artificial neural network, and fuzzy logic prediction of 28 days compressive strength of concrete

Faezehossadat KHADEMI,Mahmoud AKBARI,Sayed Mohammadmehdi JAMAL,Mehdi NIKOO

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 1,   Pages 90-99 doi: 10.1007/s11709-016-0363-9

Abstract: Finally, the sensitivity analysis (SA) for two different sets of parameters on the concrete compressive

Keywords： compressive strength     multiple linear regression     artificial neural network     ANFIS     sensitivity analysis (SA    

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Title Author Date Type Operation

Multi-stage dual replica bit-line delay technique for process-variation-robust timing of lowvoltageSRAMsense amplifier

Shou-biao TAN,Wen-juan LU,Chun-yu PENG,Zheng-ping LI,You-wu TAO,Jun-ning CHEN

Journal Article

Analysis of foundation sliding of an arch dam considering the hydromechanical behavior

Maria Luísa Braga FARINHA, José Vieira de LEMOS, Emanuel MARANHA DAS NEVES

Journal Article

A simple multi-wave algorithm for the uncapacitated facility location problem

Fred GLOVER, Saïd HANAFI, Oualid GUEMRI, Igor CREVITS

Journal Article

High linearity U-band power amplifier design: a novel intermodulation point analysis method

Jie CUI, Peipei LI, Weixing SHENG,cuijie@njust.edu.cn

Journal Article

Synthesis of spherical parallel manipulator for dexterous medical task

Abdelbadia CHAKER, Abdelfattah MLIKA, Med Amine LARIBI, Lotfi ROMDHANE, Sa?d ZEGHLOUL

Journal Article

IEEE 802.16 Mesh Network SA Management Mechanism Based on Multi-hops Mutual Authentication

Wang Xingjian,Hu Aiqun,Huang Yuhua

Journal Article

Power system design for constant current subsea observatories

Yan-hu Chen, Sa Xiao, De-jun Li,yanhuchen@zju.edu.cn,sxiao@zju.edu.cn,li_dejun@zju.edu.cn

Journal Article

Magnetic-porous microspheres with synergistic catalytic activity of small-sized gold nanoparticles and titania matrix

Kadriye Özlem Hamaloğlu, Ebru Sağ, Çiğdem Kip, Erhan Şenlik, Berna Saraço

Journal Article

Polynomial robust observer implementation based passive synchronization of nonlinear fractional-order systems with structural disturbances

Ahmad Taher Azar, Hilaire Bertrand Fotsin, Soup Teoua Michael Ouagni,kouaneteoua@yahoo.fr,aazar@psu.edu.sa

Journal Article

A novel method for extending the output power back-off range of an asymmetrical Doherty power amplifier

Mingyu LI, Xiaobing CHENG, Zhijiang DAI, Kang ZHONG, Tianfu CAI, Chaoyi HUANG

Journal Article

Experimental Study on the Piezoelectric Prestage Driver of Electrohydraulic Servo Valves

CHENG Guang-ming, SHEN Chuan-liang, YANG Zhi-gang

Journal Article

New-Generation Quality and Safety Management of the Construction Industry

Xie Xianqi, Deng Liming, Xiao Mingzhao, Luo Hanbin, Fang Ruiwei

Journal Article

SA-RSR: a read-optimal data recovery strategy for XOR-coded distributed storage systems

Xingjun ZHANG, Ningjing LIANG, Yunfei LIU, Changjiang ZHANG, Yang LI

Journal Article

Pragmatic multi-stage simulated annealing for optimal placement of synchrophasor measurement units in smart power grids

Pathirikkat GOPAKUMAR,M. JAYA BHARATA REDDY,Dusmata Kumar MOHANTA

Journal Article

Multiple linear regression, artificial neural network, and fuzzy logic prediction of 28 days compressive strength of concrete

Faezehossadat KHADEMI,Mahmoud AKBARI,Sayed Mohammadmehdi JAMAL,Mehdi NIKOO

Journal Article