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Performance Optimization Analysis of 2D - OOSC Codeword for OCDMA System

Li Chuanqi,Sun Xiaohan,Zhang Mingde,Ding Dong

Strategic Study of CAE 2003, Volume 5, Issue 4,   Pages 50-54

Abstract: It is proved that the relativity of the codeword satisfies the system requirement, and the system BERbased on multiple user interference is ascertained.

Keywords： access (OCDMA)     2-dimensions optical orthogonal square codes (2D-OOSC)     multi-users interfering (MUI)     basedbit-error-ratio (BER)    

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Chord error constraint based integrated control strategy for contour error compensation

Tie ZHANG, Caicheng WU, Yanbiao ZOU

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 645-658 doi: 10.1007/s11465-020-0601-7

Abstract: compensation based on chord error constraint, which consists of a cross-coupling controller and an improvedposition error compensator, is proposed.analyzed by using the contour error transfer function.Moreover, a feed rate regulator based on the chord error constraint is proposed, which performs speedcompensation of tracking error.

Keywords： cross-coupling controller     contour error     tracking error     position error compensator     feed rate regulator    

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Robust ensemble of metamodels based on the hybrid error measure

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 623-634 doi: 10.1007/s11465-021-0641-7

Abstract: The weight factor is adaptively determined according to the hybrid error metric, which combines globaland local error measures to improve the accuracy of the EMs.

Keywords： metamodel     ensemble of metamodels     hybrid error measure     stochastic problem    

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Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 4,   Pages 431-437 doi: 10.1007/s11465-010-0110-1

Abstract: algorithm of the homogeneous transformation matrix (HTM) method are applied in establishing the kinematic errorBased on this model, a new method for the kinematic error separation in five-axis numerical control (the value measured by telescoping double ball bar is substituted into the model to obtain kinematic error

Keywords： error modeling     error separation     telescoping double ball bar     five-axis numerical control (NC) machining    

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Trajectory optimization with constraints for alpine skiers based on multi-phase nonlinear optimal control

Cong-ying Cai, Xiao-lan Yao,yaoxiaolan@bit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 10,   Pages 1413-1534 doi: 10.1631/FITEE.1900586

Abstract: In this study, a model for alpine skiers competing in the Super-G is established based on the theory
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Identification of thermal error in a feed system based on multi-class LS-SVM

Chao JIN, Bo WU, Youmin HU, Yao CHENG

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 47-54 doi: 10.1007/s11465-012-0307-6

Abstract: The thermal positioning error of a ball-screw is one of the most important objects to consider for high-accuracyThe research work undertaken herein ultimately aims at the development of a comprehensive thermal errorUsing multi-class least squares support vector machines (LS-SVM), the thermal positioning error of theThe results show that the recommended model can be used to predict the thermal error of a feed systemThe work described in this paper lays a solid foundation of thermal error prediction and compensation

Keywords： least squares support vector machine (LS-SVM)     feed system     thermal error     precision machining    

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Optimal one-bit perturbation in Boolean networks based on cascading aggregation Research Articles

Jin-feng PAN, Min MENG

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 2,   Pages 294-303 doi: 10.1631/FITEE.1900411

Abstract: We investigate the problem of finding optimal one-bit perturbation that maximizes the size of the basinnecessary and sufficient condition is given to ensure the invariance of desired attractors after one-bitSecond, an algorithm is proposed to identify whether the one-bit perturbation will cause the emergenceNext, the change of the size of BOAs after one-bit perturbation is provided in an algorithm.

Keywords： Large-scale Boolean network     Attractor     Cascading aggregation     One-bit perturbation    

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The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on theproperties of waterborne polyurethane dispersions based on 1,5-pentamethylene diisocyanate

Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 1,   Pages 80-89 doi: 10.1007/s11705-018-1763-2

Abstract:

1,5-Pentamethylene diisocyanate, a novel aliphatic diisocyanate formed from bio-based 1,5-pentamethylenediamineindicate that the degree of hydrogen bonding and the numbers of urea groups increase as the NCO/OH ratioand HDO/DMPA molar ratio increase.Furthermore, the phase separation increases and the thermal stability decreases as the NCO/OH ratio increasesor the HDO/DMPA molar ratio decreases.

Keywords： 1     5-pentamethylene diisocyanate     polyurethane     water based    

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Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration

Zhigen WU, Guohua LIU, Zihua ZHANG

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 112-120 doi: 10.1007/s11709-010-0069-3

Abstract: A novel damage assessment method based on the decay ratio of acceleration signals (DRAS) was proposedIn addition, a new method was compared with the linear modal-based damage assessment using wavelet transform

Keywords： damage assessment     decay ratio of acceleration signals (DRAS)     wavelet transform (WT)     modal analysis     reinforced    

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Coverage performance of the multilayer UAV-terrestrial HetNet with CoMP transmission scheme Research Article

Weihao WANG, Yifan JIANG, Zesong FEI, Jing GUO,weihaowang@bit.edu.cn,jiangyifan@bit.edu.cn,feizesong@bit.edu.cn,jingguo@bit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 1,   Pages 61-72 doi: 10.1631/FITEE.2100310

Abstract: To support the ubiquitous connectivity requirement of sixth generation communication, s (UAVs) play a key role as a major part of the future communication networks. One major issue in UAV communications is the interference resulting from spectrum sharing and line-of-sight links. Recently, the application of the technology has been proposed to reduce the interference in the UAV-terrestrial heterogeneous network (HetNet). In this paper, we consider a three-dimensional (3D) multilayer UAV-terrestrial HetNet, where the aerial base stations (ABSs) are deployed at multiple different altitudes. Using stochastic geometry, we develop a tractable mathematical framework to characterize the aggregate interference and evaluate the coverage probability of this HetNet. Our numerical results show that the implementation of the CoMP scheme can effectively reduce the interference in the network, especially when the density of base stations is relatively large. Furthermore, the system parameters of the ABSs deployed at higher altitudes dominantly influence the of the considered 3D HetNet.

Keywords： Unmanned aerial vehicle     Poisson point process     Coordinated multipoint (CoMP)     Statistics of interference     Coverage performance    

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Improvement of engine performance with high compression ratio based on knock suppression using Miller

Haiqiao WEI, Jie YU, Lei ZHOU

Frontiers in Energy 2019, Volume 13, Issue 4,   Pages 691-706 doi: 10.1007/s11708-019-0621-3

Abstract: In theory, high compression ratio has the potential to improve the thermal efficiency and promote theHowever, the application of high compression ratio is substantially limited by the knock in practicalThe objective of this work is to comprehensively investigate the application of high compression ratioon a gasoline engine based on the Miller cycle with boost pressure and split injection.similar to CR10, which could eliminate the knock limits at a high compression ratio and high load.

Keywords： high compression ratio     knock     Miller cycle     split injection     engine performance    

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Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Strategic Study of CAE 2000, Volume 2, Issue 3,   Pages 73-76

Abstract: They include the development in error compensation for instrument transformers, high accuracy instrument

Keywords： instrument transformer     ratio standard     calibrator     error compensation    

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Evaluation of measurement uncertainty of the high-speed variable-slit system based on the Monte Carlo

Yin ZHANG, Jianwei WU, Kunpeng XING, Zhongpu WEN, Jiubin TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 517-537 doi: 10.1007/s11465-020-0589-z

Abstract: This paper presents a dynamic and static error transfer model and uncertainty evaluation method for ahigh-speed variable-slit system based on a two-dimensional orthogonal double-layer air-floating guideFirst, an error transfer model of the high-speed variable-slit system is established, and the influencecoefficients are calculated for each source of error associated with the accuracy of the blade motionThen, the maximum range of each error source is determined by simulation and experiment.

Keywords： air-floating guide rail     error transfer model     driving and following structure     dynamic error     uncertainty    

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Target tracking methods based on a signal-to-noise ratio model

Dai Liu, Yong-bo Zhao, Zi-qiao Yuan, Jie-tao Li, Guo-ji Chen,ybzhao@xidian.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 12,   Pages 1671-1814 doi: 10.1631/FITEE.1900679

Abstract: They are influenced by the signal-to-noise ratio (SNR).Combined with an advanced method, the extended Kalman filter method based on the SNR model (SNR-EKF)and the unscented Kalman filter method based on the SNR model (SNR-UKF) are proposed.Simulation results show that methods based on the SNR model can greatly improve the tracking performance
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Virtual-position Reading Method—a Novel Method for Error Motion and Form Error Separation

Hong Maisheng,Li Zijun,Su Heng,Ye Feifan

Strategic Study of CAE 2002, Volume 4, Issue 10,   Pages 48-51

Abstract: By means of this method, form error or error motion can be respectively separated according to practicalneeds, and the separating sequence of form error or error motion can also be optional.proposed method, it is not necessary to change the conventional measuring and separating system of form error

Keywords： virtual-position reading     signal re-organization     form error     error motion     error separation techniques    

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Title Author Date Type Operation

Performance Optimization Analysis of 2D - OOSC Codeword for OCDMA System

Li Chuanqi,Sun Xiaohan,Zhang Mingde,Ding Dong

Journal Article

Chord error constraint based integrated control strategy for contour error compensation

Tie ZHANG, Caicheng WU, Yanbiao ZOU

Journal Article

Robust ensemble of metamodels based on the hybrid error measure

Journal Article

Kinematic error separation on five-axis NC machine tool based on telescoping double ball bar

Min WANG, Jianzhong HU, Tao ZAN

Journal Article

Trajectory optimization with constraints for alpine skiers based on multi-phase nonlinear optimal control

Cong-ying Cai, Xiao-lan Yao,yaoxiaolan@bit.edu.cn

Journal Article

Identification of thermal error in a feed system based on multi-class LS-SVM

Chao JIN, Bo WU, Youmin HU, Yao CHENG

Journal Article

Optimal one-bit perturbation in Boolean networks based on cascading aggregation

Jin-feng PAN, Min MENG

Journal Article

The influence of the NCO/OH ratio and the 1,6-hexanediol/dimethylol propionic acid molar ratio on theproperties of waterborne polyurethane dispersions based on 1,5-pentamethylene diisocyanate

Jiao Feng, Qiuhao Lu, Weimin Tan, Kequan Chen, Pingkai Ouyang

Journal Article

Experimental study of structural damage identification based on modal parameters and decay ratio of acceleration

Zhigen WU, Guohua LIU, Zihua ZHANG

Journal Article

Coverage performance of the multilayer UAV-terrestrial HetNet with CoMP transmission scheme

Weihao WANG, Yifan JIANG, Zesong FEI, Jing GUO,weihaowang@bit.edu.cn,jiangyifan@bit.edu.cn,feizesong@bit.edu.cn,jingguo@bit.edu.cn

Journal Article

Improvement of engine performance with high compression ratio based on knock suppression using Miller

Haiqiao WEI, Jie YU, Lei ZHOU

Journal Article

Development and Creations of Measuring Instrument Transformers and Their Testing Equipment

Zhao Xiumin,Zhao Yitao

Journal Article

Evaluation of measurement uncertainty of the high-speed variable-slit system based on the Monte Carlo

Yin ZHANG, Jianwei WU, Kunpeng XING, Zhongpu WEN, Jiubin TAN

Journal Article

Target tracking methods based on a signal-to-noise ratio model

Dai Liu, Yong-bo Zhao, Zi-qiao Yuan, Jie-tao Li, Guo-ji Chen,ybzhao@xidian.edu.cn

Journal Article

Virtual-position Reading Method—a Novel Method for Error Motion and Form Error Separation

Hong Maisheng,Li Zijun,Su Heng,Ye Feifan

Journal Article