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Manufacturing and mechanical properties of composite orthotropic Kagome honeycomb using novel modular method

Bin NIU, Shijie LI, Rui YANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 3,   Pages 484-495 doi: 10.1007/s11465-020-0593-3

Abstract: Furthermore, two typical fiber placement methods are considered during the fabrication process, fromwhich the more effective fiber placement method is determined.

Keywords： composite     Kagome honeycomb     manufacturing     placement of fibers     equivalent stiffness    

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Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1034-y

Abstract: In this study, the impact of placement angle of bipolar aluminum electrode on WEC was investigated toprovide a detailed analysis on the correlations between the bipolar electrode placement angle and bipolarsimulations of current and potential distribution were carried out along the surface of BPE at different placementangles, revealing the mechanism of different BPE placement angles on aluminum dissolution rates in WEC

Keywords： Bipolar electrochemistry     Wireless electrocoagulation     Placement angle    

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

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: Moreover, the method of integrating practical phasor measurement unit (PMU) placement conditions likePMU channel limits and redundant placement can be easily handled.

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

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Deflection behavior of a prestressed concrete beam reinforced with carbon fibers at elevated temperatures

Mohammed FARUQI, Mohammed Sheroz KHAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 81-91 doi: 10.1007/s11709-018-0468-4

Abstract: Fiber reinforced polymer(FRP) have unique advantages like high strength to weight ratio, excellent corrosion resistance, improving deformability and cost effectiveness. These advantages have gained wide acceptance in civil engineering applications. FRP tendons for prestressing applications are emerging as one of the most promising technologies in the civil engineering industry. However, the behavior of such members under the influence of elevated temperatures is still unknown. The knowledge and application of this could lead to a cost effective and practical considerations in fire safety design. Therefore, this study examines the deflection behavior of the carbon fiber reinforced polymer(CFRP) prestressed concrete beam at elevated temperatures. In this article, an analytical model is developed which integrates the temperature dependent changes of effective modulus of FRP in predicting the deflection behavior of CFRP prestressed concrete beams within the range of practical temperatures. This model is compared with a finite element mode (FEM) of a simply supported concrete beam prestressed with CFRP subjected to practical elevated temperatures. In addition, comparison is also made with an indirect reference to the real behavior of the material. The results of the model correlated reasonably with the finite element model and the real behavior. Finally, a practical application is provided.

Keywords： FRP     CFRP     concrete     elevated temperatures     deflections     prestress    

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Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene fibers

Fatemeh ZAHIRI, Hamid ESKANDARI-NADDAF

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 4,   Pages 821-830 doi: 10.1007/s11709-019-0518-6

Abstract: studies have evaluated the effects of additives such as nano-silica (NS), micro-silica (MS) and polymer fibersIn this study, 12 mix designs containing different percentages of MS, NS, and polymer fibers in threeWhile, polymer fibers don’t have significant effect in compressive strength considering CSCs.

Keywords： mixture method     compressive strength     nano-silica     micro-silica     polypropylene fibers    

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Effect of fiber hybridization on energy absorption and synergy in concrete

Ahmadreza RAMEZANI, Mohammad Reza ESFAHANI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1338-1349 doi: 10.1007/s17009-019-0558-2

Abstract: In the present study, steel and polypropylene (PP) fibers have been utilized with the intent of obtainingIt was observed that steel fibers are more effective in the improvement of flexural toughness in thepresence of PP fibers.Furthermore, synergy associated with the combination of fibers at different stages of deflection of the

Keywords： hybrid fiber-reinforced concrete     synergy     toughness     steel fibers     polypropylene fibers    

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The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Frontiers of Structural and Civil Engineering 2016, Volume 10, Issue 2,   Pages 214-223 doi: 10.1007/s11709-016-0332-3

Abstract: matrix comprises a novel, strain resilient cementitious composite (SRCC) reinforced with polypropylene fibersinvestigation were the material structure (comprising a basic control mix, reinforced with CNTs and/or PP fibersThe test results illustrate that all the benefits gained due to the synergy between PP fibers and CNTselasto-plastic bond response envelope was a result of the confining synergistic effect of CNTs and the PP fibers

Keywords： carbon nanotubes     strain resilient cementitious composite     polypropylene fibers     tensile bending     bond    

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Recent developments in the application of oil palm fibers in cement composites

Emmanuel Owoichoechi MOMOH, Adelaja Israel OSOFERO

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 94-108 doi: 10.1007/s11709-019-0576-9

Abstract: Fibers obtained from different parts of the oil palm tree (Elaeis guineensis) have been under investigationStudies have been carried out investigating the engineering properties and possible applications of these fibersThis review provides information about fibers from different parts of the oil palm, their properties,

Keywords： broom     cement composite     concrete     oil palm fiber     Natural fiber-concrete     sustainability    

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environmental temperature and relative humidity on photocatalytic oxidation of toluene on activated carbon fibers

GUO Ting, BAI Zhipeng, WU Can, ZHU Tan

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 2,   Pages 224-229 doi: 10.1007/s11783-008-0039-3

Abstract: TiO supported on active carbon fiber (TiO/ACF), an absorbable photocatalyst, is a new kind of material applied in air purification. In this paper, the influence of environmental temperature (T) and relative humidity (RH) on the gas-solid adsorption of toluene and the photocatalytic oxidation (PCO) efficiency of adsorbed toluene on TiO/ACF were studied, and then, the purification capability of TiO/ACF was estimated. PCO results showed that although the PCO efficiency increased under high RH and T levels, the amount of adsorption of toluene decreased. Moreover, quantitative analysis results of intermediates indicated that more environmental risk emerged when PCO of toluene was carried out at higher environmental T and RH levels because more toxic intermediates would be accumulated on the TiO/ACF. So, it is significant to control the environmental T and RH conditions in the application of the PCO technique. T = 25°C and RH = 30% is the optimal condition for purifying toluene in our experimental system.

Keywords： application     gas-solid adsorption     technique     TiO/ACF     experimental    

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Speed Up the Development of Industrial Fibers Materials

Ji Guobiao

Strategic Study of CAE 2003, Volume 5, Issue 7,   Pages 24-28

Abstract:

Review of 10 years development of industrial fibers materials indicates that they are still in a continuous

Keywords： China     strengthening     industrial fibers materials     accelerateing the development    

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Optimal placement of wind turbines within a wind farm considering multi-directional wind speed using

A.S.O. OGUNJUYIGBE, T.R. AYODELE, O.D. BAMGBOJE

Frontiers in Energy 2021, Volume 15, Issue 1,   Pages 240-255 doi: 10.1007/s11708-018-0514-x

Abstract: Most wind turbines within wind farms are set up to face a pre-determined wind direction. However, wind directions are intermittent in nature, leading to less electricity production capacity. This paper proposes an algorithm to solve the wind farm layout optimization problem considering multi-angular (MA) wind direction with the aim of maximizing the total power generated on wind farms and minimizing the cost of installation. A two-stage genetic algorithm (GA) equipped with complementary sampling and uniform crossover is used to evolve a MA layout that will yield optimal output regardless of the wind direction. In the first stage, the optimal wind turbine layouts for 8 different major wind directions were determined while the second stage allows each of the previously determined layouts to compete and inter-breed so as to evolve an optimal MA wind farm layout. The proposed MA wind farm layout is thereafter compared to other layouts whose turbines have focused site specific wind turbine orientation. The results reveal that the proposed wind farm layout improves wind power production capacity with minimum cost of installation compared to the layouts with site specific wind turbine layouts. This paper will find application at the planning stage of wind farm.

Keywords： optimal placement     wind turbines     wind direction     genetic algorithm     wake effect    

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Output Feedback Control for the Descriptor TS Fuzzy Systems With Pole-placement Constraints

Gao Dan,Cao Yuanyuan

Strategic Study of CAE 2006, Volume 8, Issue 4,   Pages 63-67

Abstract: closed-loop system can be ensured to satisfy certain performance index and locate at the required pole-placement

Keywords： singular fuzzy system     dynamic output-feedback     LMI     pole placement    

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Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions

Jian Chen, Yilai Shu, Matthew R. Naunheim, Min Chen, Lei Cheng, Haitao Wu

Frontiers of Medicine 2018, Volume 12, Issue 3,   Pages 301-306 doi: 10.1007/s11684-017-0549-0

Abstract: The keel placement and control groups received endoscopic keel placement and mitomycin C, respectivelyfollow-up of at least 1 year, the laryngeal web formation rate significantly decreased in the keel placementFurthermore, the voice handicap index-10 scores for patients without web formation decreased in both the keel placementEndoscopic keel placement could be an effective method for preventing anterior glottic webs after surgery

Keywords： glottic stenosis     glottic web     laryngeal keel     silastic sheets     anterior commissure    

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Review of recent developments in cement composites reinforced with fibers and nanomaterials

Jianzhuang XIAO, Nv HAN, Yan LI, Zhongsen ZHANG, Surendra P. SHAH

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 1-19 doi: 10.1007/s11709-021-0723-y

Abstract: Concrete reinforcement with fibers has a long history.Nowadays, many new fibers associated with high performance and possessing eco-environmental characteristics, such as basalt fibers and plant fibers, have received much attention from researchers.This paper provides an overview of the recent research progress on cement composites reinforced with fibersThe influences of fibers and nanomaterials on the fresh and hardened properties of cement composites

Keywords： cement composites     fiber     nanomaterial     mechanical property     durability    

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Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution

L. RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

Frontiers in Energy 2012, Volume 6, Issue 1,   Pages 47-56 doi: 10.1007/s11708-011-0159-5

Abstract: The advancement in power distribution system poses a great challenge to power engineering researchers on how to best monitor and estimate the state of the distribution network. This paper is executed in two stage processes. The first stage is to identify the optimal location for installation of monitoring instrument with minimal investment cost. The second stage is to estimate the bus voltage magnitude, where real time measurement is conducted and measured through identified meter location which is more essential for decision making in distribution supervisory control and data acquisition system (DSCADA). The hybrid intelligent technique is applied to execute the above two algorithms. The algorithms are tested with institute of electrical and electronics engineers (IEEE) and Tamil Nadu electricity board (TNEB) benchmark systems. The simulated results proves that the swarm tuned artificial neural network (ANN) estimator is best suited for accurate estimation of voltage with different noise levels.

Keywords： artificial intelligence     power distribution control     state estimation    

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Title Author Date Type Operation

Manufacturing and mechanical properties of composite orthotropic Kagome honeycomb using novel modular method

Bin NIU, Shijie LI, Rui YANG

Journal Article

Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Journal Article

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

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

Journal Article

Deflection behavior of a prestressed concrete beam reinforced with carbon fibers at elevated temperatures

Mohammed FARUQI, Mohammed Sheroz KHAN

Journal Article

Optimizing the compressive strength of concrete containing micro-silica, nano-silica, and polypropylene fibers

Fatemeh ZAHIRI, Hamid ESKANDARI-NADDAF

Journal Article

Effect of fiber hybridization on energy absorption and synergy in concrete

Ahmadreza RAMEZANI, Mohammad Reza ESFAHANI

Journal Article

The effect of carbon nanotubes and polypropylene fibers on bond of reinforcing bars in strain resilient

Souzana P. TASTANI,Maria S. KONSTA-GDOUTOS,Stavroula J. PANTAZOPOULOU,Victor BALOPOULOS

Journal Article

Recent developments in the application of oil palm fibers in cement composites

Emmanuel Owoichoechi MOMOH, Adelaja Israel OSOFERO

Journal Article

environmental temperature and relative humidity on photocatalytic oxidation of toluene on activated carbon fibers

GUO Ting, BAI Zhipeng, WU Can, ZHU Tan

Journal Article

Speed Up the Development of Industrial Fibers Materials

Ji Guobiao

Journal Article

Optimal placement of wind turbines within a wind farm considering multi-directional wind speed using

A.S.O. OGUNJUYIGBE, T.R. AYODELE, O.D. BAMGBOJE

Journal Article

Output Feedback Control for the Descriptor TS Fuzzy Systems With Pole-placement Constraints

Gao Dan,Cao Yuanyuan

Journal Article

Prevention of laryngeal webs through endoscopic keel placement for bilateral vocal cord lesions

Jian Chen, Yilai Shu, Matthew R. Naunheim, Min Chen, Lei Cheng, Haitao Wu

Journal Article

Review of recent developments in cement composites reinforced with fibers and nanomaterials

Jianzhuang XIAO, Nv HAN, Yan LI, Zhongsen ZHANG, Surendra P. SHAH

Journal Article

Intelligent algorithm for optimal meter placement and bus voltage estimation in ring main distribution

L. RAMESH, N. CHAKRABORTY, S. P. CHOWDHURY

Journal Article