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Performance design of a cryogenic air separation unit for variable working conditions using the lumped parameter model

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1, Pages 24-42 doi: 10.1007/s11465-019-0558-6

Abstract: Takagi–Sugeno (T–S) fuzzy interval detection is recursively utilized to determine whether the criticalparticularly suitable for “rough first then precise” modeling by expanding the feasible domain using fuzzy

Keywords： performance design air separation unit (ASU) lumped parameter model (LPM) variable working conditions T–Sfuzzy interval detection

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An interval type-2 fuzzy logic controller for TCSC to improve the damping of power system oscillations

Manoj Kumar PANDA, Gopinath PILLAI, Vijay KUMAR

Frontiers in Energy 2013, Volume 7, Issue 3, Pages 307-316 doi: 10.1007/s11708-013-0269-3

Abstract: In this paper an interval type-2 fuzzy logic controller (IT2FLC) was proposed for thyristor controlledFor controller design, memberships of system variables were represented using interval type-2 fuzzy setsThe three-dimensional membership function of type-2 fuzzy sets provided additional degree of freedomthe proposed controller was more effective than particle swarm optimization (PSO) tuned and type-1 fuzzylogic (T1FL) based damping controllers.

Keywords： power system oscillations thyristor controlled series capacitor (TCSC) type-2 fuzzy logic system intervaltype-2 fuzzy logic controller (IT2FLC)

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A novel approach for remanufacturing process planning considering uncertain and fuzzy information

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3, Pages 546-558 doi: 10.1007/s11465-021-0639-1

Abstract: comprehensively studied the interactions among damage conditions and quality requirements that involve uncertain, fuzzyHence, this challenge in the context of uncertain, fuzzy information is undertaken in this paper, andThe solution is provided through an improved Takagi–Sugeno fuzzy neural network (T-S FNN) method.Results show that the training speed and accuracy of the improved T-S FNN method are 23.5% and 82.5%

Keywords： remanufacturing uncertain and fuzzy information process planning T-S FNN

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A consensus model for group decision making under interval type-2 fuzzy environment

Xiao-xiong ZHANG,Bing-feng GE,Yue-jin TAN

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 3, Pages 237-249 doi: 10.1631/FITEE.1500198

Abstract: We propose a new consensus model for group decision making (GDM) problems, using an interval type-2 fuzzyIn our model, experts are asked to express their preferences using linguistic terms characterized by intervaltype-2 fuzzy sets (IT2 FSs), because these can provide decision makers with greater freedom to express

Keywords： Group decision making (GDM) Interval type-2 fuzzy sets (IT2 FSs) Feedback mechanism

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Predictive Functional Control Based on Fuzzy Model for HVAC Systems

Lu Hongli,Jia Lei,Wang Lei,Gao Rui

Strategic Study of CAE 2006, Volume 8, Issue 9, Pages 65-68

Abstract: A novel predictive functional control strategy based on Takagi-Sugeno fuzzy model was developed in orderThe T - S fuzzy model of controlled process was obtained using the least squares method, then basingon the fuzzy T - S global linear predictive model, the process was controlled by the predictive functionalFinally, the simulation results in HVAC systems control application showed that the proposed fuzzy model

Keywords： T-S fuzzy model predictive functional control least squares method HVAC systems

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The S-N Curve Fitted by the Least Square Method Considering the Effect of Length of the Confidence Interval

Yang Xiaohua,Jin Ping,Yao Weixing

Strategic Study of CAE 2004, Volume 6, Issue 4, Pages 41-43

Abstract:

The S-N curve is the base of calculating fatigue structural life.in which the weigh of a group of test data is inversely proportional to the length of the confidence intervalThe calculating results show that the S-N curve which is gained by the least square method consideringthe effect of length of the confidence interval is more reliable and secure than the S-N curve which

Keywords： confidence interval fatigue life least square method S-N curve

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Interval type-2 fuzzy logic based radar task priority assignment method for detecting hypersonic-glide Research Articles

Fanqing MENG, Kangsheng TIAN,maoximengruizhi@126.com,tiankangsheng@sohu.com

Frontiers of Information Technology & Electronic Engineering 2022, Volume 23, Issue 3, Pages 488-501 doi: 10.1631/FITEE.2000560

Abstract: To reduce the number of fuzzy rules and avoid rule explosion, an IT2FLS with a hierarchical structure

Keywords： Hypersonic-glide vehicle (HGV) Phased-array radar Interval type-2 fuzzy logic system (IT2FLS) Priority

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Unified power quality conditioner based on a three-level NPC inverter using fuzzy control techniques

Salim CHENNAI,M-T BENCHOUIA

Frontiers in Energy 2014, Volume 8, Issue 2, Pages 221-239 doi: 10.1007/s11708-014-0317-7

Abstract: unified power quality conditioner (UPQC) based on three-level neutral point clamped (NPC) inverter using fuzzyTo improve the UPQC capability, fuzzy logic techniques are introduced to control the series APF.

Keywords： point clamped (NPC) inverter unified power quality conditioner (UPQC) current harmonics mitigation fuzzy

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Derivation and analysis on the analytical structure of interval type-2 fuzzy controller with two nonlinearfuzzy sets for each input variable Project supported by the Xinjiang Astronomical Observatory Article

Bin-bin LEI,Xue-chao DUAN,Hong BAO,Qian XU

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 6, Pages 587-602 doi: 10.1631/FITEE.1601019

Abstract: In this study, we derive and analyze the analytical structure of an interval type-2 fuzzy controllerthat uses the following identical elements: two nonlinear interval type-2 input fuzzy sets for each variable, four interval type-2 singleton output fuzzy sets, a Zadeh AND operator, and the Karnik-Mendel typeThrough dividing the input space of the interval type-2 fuzzy controller into 15 partitions, the input-outputFinally, the reliability of the analysis results and the effectiveness of the interval type-2 fuzzy controller

Keywords： Interval type-2 fuzzy controller Analytical structure Karnik-Mendel type reducer

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Finite element analysis and structural design of pretensioned inverted T-beams with web openings

Hock Tian CHENG, Bashar S. MOHAMMED, Kamal Nasharuddin MUSTAPHA

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2, Pages 148-157 doi: 10.1007/s11709-009-0030-5

Abstract: project aimed at providing standard circular web openings to the popular precast pretensioned inverted T-beamIn this paper the nonlinear analysis and design of simply supported pretensioned inverted T-beam withnonlinear finite element analysis were substantiated by test results from five pretensioned inverted T-beamsA simple design method for pretensioned inverted T-beam with circular web openings is proposed.

Keywords： prestressed concrete inverted-T beam web opening

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Ultimate load analysis of pretensioned inverted T-beams with circular web openings

Hock Tian CHENG , Bashar S. MOHAMMED , Kamal Nasharuddin MUSTAPHA ,

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 3, Pages 262-271 doi: 10.1007/s11709-009-0031-4

Abstract: In this paper, ultimate load analysis of statically loaded simply supported pretensioned inverted T-beams

Keywords： pretensioned inverted T-beam web opening

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Fuzzy cascade control based on control’s history for superheated temperature

WANG Guangjun, LI Gang, SHEN Shuguang

Frontiers in Energy 2007, Volume 1, Issue 3, Pages 285-289 doi: 10.1007/s11708-007-0040-8

Abstract: uncertainty of superheated temperature, a new cascade control system is presented based on control’sinformation (substituting for the deviation change rate) is used as the basis for decision-making of the fuzzyFurthermore, a proportional component is introduced, the advantages of PID and fuzzy controllers areintegrated, and the structure weaknesses of conventional fuzzy controllers are overcome.by comparing the superheated temperature control system by this controller with PID and conventional fuzzy

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Thermal-aware relocation of servers in green data centers

Muhammad Tayyab CHAUDHRY,T. C. LING,S. A. HUSSAIN,Xin-zhu LU

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 2, Pages 119-134 doi: 10.1631/FITEE.1400174

Abstract: Rise in inlet air temperature increases the corresponding outlet air temperature from the server. As an added effect of rise in inlet air temperature, some active servers may start exhaling intensely hot air to form a hotspot. Increase in hot air temperature and occasional hotspots are an added burden on the cooling mechanism and result in energy wastage in data centers. The increase in inlet air temperature may also result in failure of server hardware. Identifying and comparing the thermal sensitivity to inlet air temperature for various servers helps in the thermal-aware arrangement and location switching of servers to minimize the cooling energy wastage. The peak outlet temperature among the relocated servers can be lowered and even be homogenized to reduce the cooling load and chances of hotspots. Based upon mutual comparison of inlet temperature sensitivity of heterogeneous servers, this paper presents a proactive approach for thermal-aware relocation of data center servers. The experimental results show that each relocation operation has a cooling energy saving of as much as 2.1 kW·h and lowers the chances of hotspots by over 77%. Thus, the thermal-aware relocation of servers helps in the establishment of green data centers.

Keywords： Servers Green data center Thermal-aware Relocation

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Classical state feedback controller for nonlinear systems using mean value theorem: closed loop-FOC of PMSM motor application

Abrar ALLAG,Abdelhamid BENAKCHA,Meriem ALLAG,Ismail ZEIN,Mohamed Yacine AYAD

Frontiers in Energy 2015, Volume 9, Issue 4, Pages 413-425 doi: 10.1007/s11708-015-0379-1

Abstract: The problem of state feedback controllers for a class of Takagi-Sugeno (T-S) Lipschitz nonlinear systems

Keywords： Takagi-Sugeno (T-S) fuzzy systems sector nonlinearity nonlinear controller linear matrix inequality (

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Thermal degradation characteristics and products obtained after pyrolysis of specific polymers found in Waste Electrical and Electronic Equipment

Vouvoudi, Aristea T. Rousi, Dimitris S. Achilias

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 5, doi: 10.1007/s11783-017-0996-5

Abstract: Modern societies strongly support the recycling practices over simple waste accumulation due to environmental harm caused. In the framework of sustainable recycling of plastics from WEEE, pyrolysis is proposed here as a means of obtaining secondary value-added products. The aim of this study was to investigate the thermal degradation and the products obtained after pyrolysis of specific polymers found in the plastic part of WEEE, using thermogravimetric analysis and a pyrolizer equipped with a GC/MS. Polymers studied include ABS, HIPS, PC and a blend having a composition similar to that appearing in WEEE. It was found that, PC shows greater heat endurance compared to the other polymers, whereas ABS depolymerizes in three-steps. The existence of several polymers in the blend results in synergistic effects which decrease the onset and final temperature of degradation. Moreover, the fragmentation occurred in the pyrolyzer, at certain temperatures, resulted in a great variety of compounds, depending on the polymer type, such as monomers, aromatic products, phenolic compounds and hydrocarbons. The main conclusion from this investigation is that pyrolysis could be an effective method for the sustainable recycling of the plastic part of WEEE resulting in a mixture of chemicals with varying composition but being excellent to be used as fuel retrieved from secondary recycling sources.

Keywords： Pyrolysis WEEE recycling ABS HIPS PC Py-GC/MS TGA

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Title Author Date Type Operation

Performance design of a cryogenic air separation unit for variable working conditions using the lumped parameter model

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Journal Article

An interval type-2 fuzzy logic controller for TCSC to improve the damping of power system oscillations

Manoj Kumar PANDA, Gopinath PILLAI, Vijay KUMAR

Journal Article

A novel approach for remanufacturing process planning considering uncertain and fuzzy information

Journal Article

A consensus model for group decision making under interval type-2 fuzzy environment

Xiao-xiong ZHANG,Bing-feng GE,Yue-jin TAN

Journal Article

Predictive Functional Control Based on Fuzzy Model for HVAC Systems

Lu Hongli,Jia Lei,Wang Lei,Gao Rui

Journal Article

The S-N Curve Fitted by the Least Square Method Considering the Effect of Length of the Confidence Interval

Yang Xiaohua,Jin Ping,Yao Weixing

Journal Article

Interval type-2 fuzzy logic based radar task priority assignment method for detecting hypersonic-glide

Fanqing MENG, Kangsheng TIAN,maoximengruizhi@126.com,tiankangsheng@sohu.com

Journal Article

Unified power quality conditioner based on a three-level NPC inverter using fuzzy control techniques

Salim CHENNAI,M-T BENCHOUIA

Journal Article

Derivation and analysis on the analytical structure of interval type-2 fuzzy controller with two nonlinearfuzzy sets for each input variable Project supported by the Xinjiang Astronomical Observatory

Bin-bin LEI,Xue-chao DUAN,Hong BAO,Qian XU

Journal Article

Finite element analysis and structural design of pretensioned inverted T-beams with web openings

Hock Tian CHENG, Bashar S. MOHAMMED, Kamal Nasharuddin MUSTAPHA

Journal Article

Ultimate load analysis of pretensioned inverted T-beams with circular web openings

Hock Tian CHENG , Bashar S. MOHAMMED , Kamal Nasharuddin MUSTAPHA ,

Journal Article

Fuzzy cascade control based on control’s history for superheated temperature

WANG Guangjun, LI Gang, SHEN Shuguang

Journal Article

Thermal-aware relocation of servers in green data centers