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The Rion-Antirion bridge—when a dream becomes reality

Jacques COMBAULT

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 4,   Pages 415-426 doi: 10.1007/s11709-011-0130-x

Abstract: Opened to traffic in August 2004, the Rion-Antirion Bridge crosses the Gulf of Corinth near Patras in western Greece. It consists of an impressive multi cable-stayed span bridge connected to the land by two approaches. An exceptional combination of physical conditions made this project quite unusual: high water depth, deep strata of weak soil, strong seismic activity and fault displacements. In addition a risk of heavy ship collision had to be taken into account. The structure has been designed in view of challenging severe earthquakes and ensuring the everyday serviceability of the link as well. To make the bridge feasible, innovative techniques had to be developed: The strength of the in situ soil has been improved by means of inclusions; the bridge deck has been suspended on its full length, and therefore isolated as much as it can be.

Keywords： bridge     multi cable-stayed spans     soil reinforcement     inclusions     yield theory     capacity design     push-over    

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Distributed optimization based on improved push-sum framework for optimization problem with multiple

徐谦,俞楚天,袁翔,韦梦立,刘洪喆

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 9,   Pages 1253-1260 doi: 10.1631/FITEE.2200596

Abstract: The aim is to design a corresponding distributed optimization algorithm over the fixed unbalanced graphTo this end, with the push-sum framework improved, the distributed optimization algorithm is newly designed

Keywords： Distributed optimization     Nonidentical constraints     Improved push-sum framework    

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Global Timekeepers Push Pause on the Leap Second

Chris Palmer

Engineering 2023, Volume 27, Issue 8,   Pages 6-7 doi: 10.1016/j.eng.2023.06.003

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Advanced Antennas Push Forward Wireless Connectivity

Kwai Man Luk, Baoyan Duan

Engineering 2022, Volume 11, Issue 4,   Pages 1-2 doi: 10.1016/j.eng.2022.03.003

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Synthesis and characterization of 2,5-bis[4-(2-arylvinyl)phenyl]-1,3,4-oxadiazoles with two-photon fluorescence properties

ZHU Xiaoqin, QIAN Ying, LU Zhifeng

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 4,   Pages 381-384 doi: 10.1007/s11705-007-0069-6

Abstract: two-photon absorption and enhanced two-photon excited fluorescence were designed and synthesized based on push-core-pull-core-push

Keywords： 2-arylvinyl     trans-vinylene character     effective     fluorescence     push-core-pull-core-push    

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A knowledge push technology based on applicable probability matching and multidimensional context driving None

Shu-you ZHANG, Ye GU, Xiao-jian LIU, Jian-rong TAN

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2,   Pages 235-245 doi: 10.1631/FITEE.1700763

Abstract: Actively pushing design knowledge to designers in the design process, what we call ‘knowledge push’,A knowledge push technology usually includes matching of related knowledge and proper pushing of matchingThe push results were defined by the comparison between two probability values.The hierarchical design content models were built to filter the knowledge in push results.A knowledge push system based on intellectualized design of CNC machine tools was used to confirm the

Keywords： Product design     Knowledge push     Applicable probability matching     Multidimensional context     Personalization    

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Push recovery for the standing under-actuated bipedal robot using the hip strategy

Chao LI,Rong XIONG,Qiu-guo ZHU,Jun WU,Ya-liang WANG,Yi-ming HUANG

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 7,   Pages 579-593 doi: 10.1631/FITEE.14a0230

Abstract: This paper presents a control algorithm for push recovery, which particularly focuses on the hip strategyFinally, simulation studies of the push recovery of a bipedal robot are presented to demonstrate the

Keywords： Push recovery     Balance control     Bipedal robot     Hip strategy    

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Reductive amination of -hexanol to -hexylamine over Ni–Ce/-AlO catalysts

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 82-92 doi: 10.1007/s11705-022-2181-z

Abstract: The amination of alkyl alcohols is one of the most promising paths in synthesis of aliphatic amines. Herein, cerium doped nickel-based catalysts were synthesized and tested in a gas-phase amination of n-hexanol to n-hexylamine. It was found that the activity of the Ni/γ-Al2O3 catalyst is significantly improved by doping an appropriate amount of cerium. The presence of cerium effectively inhibits the agglomeration of nickel particle, resulting in better Ni dispersion. As Ni particle size plays critical role on the catalytic activity, higher turnover frequency of n-hexanol amination was achieved. Cerium doping also improves the reduction ability of nickel and enhances the interactions between Ni and the catalyst support. More weak acid sites were also found in those cerium doped catalysts, which promote another key step—ammonia dissociative adsorption in this reaction system. The overall synergy of Ni nanoparticles and acid sites of this Ni–Ce/γ-Al2O3 catalyst boosts its superior catalytic performance in the amination of n-hexanol.

Keywords： amination     alcohol     cerium     nickel     acidity     interaction    

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Supersonic flows over cavities

FANG Tianwen, DING Meng, ZHOU Jin

Frontiers in Energy 2008, Volume 2, Issue 4,   Pages 528-533 doi: 10.1007/s11708-008-0055-9

Abstract: The characteristics of supersonic cold flows over cavities were investigated experimentally and numerically

Keywords： supersonic     different     ratio    

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Efficient conversion of lignin to alkylphenols over highly stable inverse spinel MnFeO catalysts

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 8,   Pages 1085-1095 doi: 10.1007/s11705-022-2236-1

Abstract: The aromatic properties of lignin make it a promising source of valuable chemicals and fuels. Developing efficient and stable catalysts to effectively convert lignin into high-value chemicals is challenging. In this work, MnFe2O4 spinel catalysts with oxygen-rich vacancies and porous distribution were synthesized by a simple solvothermal process and used to catalyze the depolymerization of lignin in an isopropanol solvent system. The specific surface area was 110.5 m2∙g–1, which substantially increased the active sites for lignin depolymerization compared to Fe3O4. The conversion of lignin reached 94%, and the selectivity of alkylphenols exceeded 90% after 5 h at 250 °C. Underpinned by characterizations, products, and density functional theory analysis, the results showed that the catalytic performance of MnFe2O4 was attributed to the composition of Mn and Fe with strong Mn–O–Fe synergy. In addition, the cycling experiments and characterization showed that the depolymerized lignin on MnFe2O4 has excellent cycling stability. Thus, our work provides valuable insights into the mechanism of lignin catalytic depolymerization and paves the way for the industrial-scale application of this process.

Keywords： lignin depolymerization     spinel     catalysts     hydrogenation    

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matching approach based on multi-classification radial basis function neural network for knowledge push Research Articles

Shu-you Zhang, Ye Gu, Guo-dong Yi, Zi-li Wang,zsy@zju.edu.cn,me_guye@zju.edu.cn,ygd@zju.edu.cn,ziliwang@zju.edu.cn

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 7,   Pages 963-1118 doi: 10.1631/FITEE.1900057

Abstract: We present an exploratory study to improve the performance of a in . We focus on the domain of , where traditional matching algorithms need repeated calculations that result in a long response time and where accuracy needs to be improved. The goal of our approach is to meet designers’ knowledge demands with a quick response and quality service in the . To improve the previous work, two methods are investigated to augment the limited training set in practical operations, namely, oscillating the feature weight and revising the case feature in the case feature vectors. In addition, we propose a multi-classification radial basis function neural network that can match the knowledge from the knowledge base once and ensure the accuracy of pushing results. We apply our approach using the training set in the design of guides by computer numerical control machine tools for training and testing, and the results demonstrate the benefit of the . Moreover, experimental results reveal that our approach outperforms other matching approaches.

Keywords： Product design     Knowledge push system     Augmented training set     Multi-classification neural network     Knowledge    

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NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 1973-1985 doi: 10.1007/s11705-023-2364-2

Abstract: Ammonia is crucial in industry and agriculture, but its production is hindered by environmental concerns and energy-intensive processes. Hence, developing an efficient and environmentally friendly catalyst is imperative. In this study, we employed a straightforward and efficient impregnation technique to create various Cu-doped catalysts. Notably, the optimized 10Fe-8Cu/TiO2 catalyst exhibited exceptional catalytic performance in converting NO to NH3, achieving an NO conversion rate exceeding 80% and an NH3 selectivity exceeding 98% at atmospheric pressure and 350 °C. We employed in situ diffuse reflectance Fourier transform infrared spectroscopy and conducted density functional theory calculations to investigate the intermediates and subsequent adsorption. Our findings unequivocally demonstrate that Cu doping enhances the rate-limiting hydrogenation step and lowers the energy barrier for NH3 desorption, thereby resulting in improved NO conversion and enhanced selectivity toward ammonia. This study presents a pioneering approach toward energy-efficient ammonia synthesis and recycling of nitrogen sources.

Keywords： NO hydrogenation     synthetic ammonia     10Fe-xCu/TiO2     high selectivity    

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REVEALS METABOLITE VARIATION AND FLAVONOID REGULATORY NETWORKS IN FRESH SHOOTS OF TEA (CAMELLIA SINENSIS) OVER

Frontiers of Agricultural Science and Engineering 2021, Volume 8, Issue 2,

Abstract:

Metabolites, especially secondary metabolites, are very important in the adaption of tea plants and the quality of tea products. Here, we focus on the seasonal variation in metabolites of fresh tea shoots and their regulatory mechanism at the transcriptional level. The metabolic profiles of fresh tea shoots of 10 tea accessions collected in spring, summer, and autumn were analyzed using ultra-performance liquid chromatography coupled with quadrupole-obitrap mass spectrometry. We focused on the metabolites and key genes in the phenylpropanoid/flavonoid pathway integrated with transcriptome analysis. Multivariate statistical analysis indicates that metabolites were distinctly different with seasonal alternation. Flavonoids, amino acids, organic acids and alkaloids were the predominant metabolites. Levels of most key genes and downstream compounds in the flavonoid pathway were lowest in spring but the catechin quality index was highest in spring. The regulatory pathway was explored by constructing a metabolite correlation network and a weighted gene co-expression network.

 

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Plastic materials and water sources actively select and shape wastewater plastispheres over time

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 11, doi: 10.1007/s11783-022-1580-1

Abstract:

● Wastewater MPs exhibited resistomes and therefore health threats.

Keywords： Microplastics     Whole-genome metagenomic sequencing     Plastisphere     Plastic degradation     MHETase    

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Stability and agility: biped running over varied and unknown terrain

Yang YI,Zhi-yun LIN

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 4,   Pages 283-292 doi: 10.1631/FITEE.1400284

Abstract: We tackle the problem of a biped running over varied and unknown terrain.It is able to run over upward and downward terrain with a height difference of 0.15 m, which shows the

Keywords： Underactuated running biped     Dynamic balance     Varied and unknown terrain    

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Title Author Date Type Operation

The Rion-Antirion bridge—when a dream becomes reality

Jacques COMBAULT

Journal Article

Distributed optimization based on improved push-sum framework for optimization problem with multiple

徐谦,俞楚天,袁翔,韦梦立,刘洪喆

Journal Article

Global Timekeepers Push Pause on the Leap Second

Chris Palmer

Journal Article

Advanced Antennas Push Forward Wireless Connectivity

Kwai Man Luk, Baoyan Duan

Journal Article

Synthesis and characterization of 2,5-bis[4-(2-arylvinyl)phenyl]-1,3,4-oxadiazoles with two-photon fluorescence properties

ZHU Xiaoqin, QIAN Ying, LU Zhifeng

Journal Article

A knowledge push technology based on applicable probability matching and multidimensional context driving

Shu-you ZHANG, Ye GU, Xiao-jian LIU, Jian-rong TAN

Journal Article

Push recovery for the standing under-actuated bipedal robot using the hip strategy

Chao LI,Rong XIONG,Qiu-guo ZHU,Jun WU,Ya-liang WANG,Yi-ming HUANG

Journal Article

Reductive amination of -hexanol to -hexylamine over Ni–Ce/-AlO catalysts

Journal Article

Supersonic flows over cavities

FANG Tianwen, DING Meng, ZHOU Jin

Journal Article

Efficient conversion of lignin to alkylphenols over highly stable inverse spinel MnFeO catalysts

Journal Article

matching approach based on multi-classification radial basis function neural network for knowledge push

Shu-you Zhang, Ye Gu, Guo-dong Yi, Zi-li Wang,zsy@zju.edu.cn,me_guye@zju.edu.cn,ygd@zju.edu.cn,ziliwang@zju.edu.cn

Journal Article

NO hydrogenation to NH over FeCu/TiO catalyst with improved activity

Journal Article

REVEALS METABOLITE VARIATION AND FLAVONOID REGULATORY NETWORKS IN FRESH SHOOTS OF TEA (CAMELLIA SINENSIS) OVER

Journal Article

Plastic materials and water sources actively select and shape wastewater plastispheres over time

Journal Article

Stability and agility: biped running over varied and unknown terrain

Yang YI,Zhi-yun LIN

Journal Article