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A General Strategy to Electrospin Nanofibers with Ultrahigh Molecular Chain Orientation Article

Xian Wen, Jian Xiong, Zhaoyang Sun, Liming Wang, Jianyong Yu, Xiaohong Qin

Engineering 2023, Volume 29, Issue 10,   Pages 179-187 doi: 10.1016/j.eng.2022.09.008

Abstract:

The degree of polymer chain orientation is a key structural parameter that determines the mechanicalHowever, understanding and significantly tuning the orientation of fiber macromolecular chains remainHerein, we propose a novel electrospinning technique that can efficiently modulate molecular chain orientationAs a result, the macromolecular chain orientation of polyethylene oxide (PEO) nanofibers was significantlyThis work guides a new perspective for the preparation of advanced electrospun nanofibers with optimal orientation

Keywords： Molecular orientation     Electrospinning     Nanofibers     Electric field     Polyethylene oxide    

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Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC

Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 11,   Pages 1424-1435 doi: 10.1007/s11709-022-0870-9

Abstract: The orientation of fibers, in this regard, is one of the major factors influencing the ductile behaviorIn this study, fiber orientation distributions in ECC beams influenced by different casting techniquesThe simulation results show a significant impact of the casting direction on fiber orientation distributionsIn addition, casting positions show negligible influences on the orientation distribution of fibers in

Keywords： ECC     fiber orientation distribution     casting direction     casting position    

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Crystallographic orientation effect on cutting-based single atomic layer removal

Wenkun XIE, Fengzhou FANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 631-644 doi: 10.1007/s11465-020-0599-x

Abstract: In the present study, the crystallographic orientation effect on the cutting-based single atomic layerremoval of monocrystalline copper is investigated by molecular dynamics simulation.

Keywords： ACSM     single atomic layer removal mechanism     crystallographic orientation effect     mechanical cutting     Manufacturing    

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Tomographic diagnosis of defects in hydraulic concrete structure

ZHAO Mingjie, XU Xibin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 226-232 doi: 10.1007/s11709-008-0027-5

Abstract: The influences of water, scale and orientation of defect, processing methods and theoretical model onDefects with the orientation perpendicular to the direction of the diagnosis may have higher precision

Keywords： satisfactory     processing     orientation     tomographic diagnosis     orientation perpendicular    

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Planar jumping with stable landing through foot orientation design and ankle joint control

Qilong YUAN, I-Ming CHEN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 2,   Pages 100-108 doi: 10.1007/s11465-012-0318-3

Abstract:

This paper introduces a method to generate the planar jumping motion for biped robot. In this work, through determining the upper body posture trajectory in the flight phase, the foot landing posture is made to be flat while landing. Together with properly designing the trajectory for local center of gravity and the foot landing velocity, the soft landing trajectory is generated. A controller on the ankle joint is added to avoid significant impact with the ground and stabilize the robot after landing. Jumping motion with stable landing is achieved in a dynamic simulation environment based on this method.

Keywords： biped jumping     stable landing control     jumping motion generation    

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Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0737-8

Abstract: The build orientation is crucial in AM because it affects the as-built part, including its part accuracyThis study proposes a method to determine the build orientation of multi-feature mechanical parts (MFMPssimilarity to the ideal solution and cosine similarity measure is presented to select an optimal build orientationmeasured average sampling surface roughness of the most crucial feature of the bracket in the original orientation

Keywords： selective laser melting (SLM)     build orientation determination     multi-feature mechanical part (MFMP)    

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Special issue on “Molecular Sensors and Molecular Logic Gates”

Luling Wu , Tony D. James

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 1-3 doi: 10.1007/s11705-021-2134-y

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Design of bio-oil additives via molecular signature descriptors using a multi-stage computer-aided molecular

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 2,   Pages 168-182 doi: 10.1007/s11705-021-2056-8

Abstract: In this work, computer-aided molecular design tools were developed to design optimal solvents to upgradeAs different property prediction models consist different levels of structural information, molecularDue to the combinatorial nature of higher-order signatures, the complexity of a computer-aided molecular

Keywords： computer-aided molecular design     bio-oil additives     molecular signature descriptor    

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Progress on molecular biomarkers and classification of malignant gliomas

Chuanbao Zhang, Zhaoshi Bao, Wei Zhang, Tao Jiang

Frontiers of Medicine 2013, Volume 7, Issue 2,   Pages 150-156 doi: 10.1007/s11684-013-0267-1

Abstract: Great efforts have been made to incorporate new information about the molecular landscape of gliomas

Keywords： malignant glioma     molecular biomarker     IDH1     MGMT     molecular classification    

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Molecular classification and molecular targeted therapy of cancer

Miao Xu, Jianyong Shao, Yixin Zeng

Frontiers of Medicine 2013, Volume 7, Issue 2,   Pages 147-149 doi: 10.1007/s11684-013-0274-2

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Advances in Molecular Electronics: A Brief Review Review

Paven Thomas Mathew, Fengzhou Fang

Engineering 2018, Volume 4, Issue 6,   Pages 760-771 doi: 10.1016/j.eng.2018.11.001

Abstract:

The field of molecular electronics, also known as moletronics, deals with the assembly of molecularNovel research has been performed in developing electrical-equivalent molecular components.Since there is a need to reduce the size of the silicon chip, attaining such technology at the molecularAlthough the experimental verification and modeling of molecular devices present a daunting task, vitalThis article combines an overview of various molecular components, such as molecular transistors, diodes

Keywords： Moletronics     Molecular transistor     Molecular diode     Molecular capacitor     Molecular wire     Graphene    

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Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 250-256 doi: 10.1007/s11705-009-0281-7

Abstract: According to the elemental analysis, molecular weight and H-NMR data, average molecular structures ofconformations of polycyclic aromatic and heavy resin in vacuum and toluene solution were obtained by moleculardynamic simulation, and the molecular size was gotten via the radius of gyration analysis.With molecular weight increasing, the molecular size in vacuum and toluene solution also increased.Thus, the molecular size in toluene solution was larger than that in vacuum.

Keywords： dynamic simulation     molecular dynamic     behavior     molecule     Adsorption Chromatography    

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Effect of / molecular structures on pyrolysis performance and heat sink of decalin isomers

Frontiers of Chemical Science and Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11705-023-2375-z

Abstract: Decalin is considered as an important compound of high-energy-density endothermic fuel, which is an ideal on-board coolant for thermal management of advanced aircraft. However, decalin contains two isomers with a tunable composition, and their effects on the pyrolysis performance, such as the heat sink and coking tendency have not been demonstrated. Herein, we investigated the pyrolysis of decalin isomers, i.e., cis-decalin, trans-decalin and their mixtures (denoted as mix-decalin), in order to clarify the effects of the cis-/trans-structures on the pyrolysis performance of decalin fuels. The pyrolysis results confirmed that conversion of the tested fuels (600–725 °C, 4 MPa) decreased in the order cis-decalin > mix-decalin > trans-decalin. Detailed analyses of the pyrolysis products were used to compare the product distributions from cis-decalin, mix-decalin and trans-decalin, and the yields of some typical components (such as cyclohexene, 1-methylcyclohexene, benzene and toluene) showed significant differences, which could be ascribed to deeper cracking of cis-decalin. Additionally, the heat sinks and coking tendencies of the decalins decreased in the order cis-decalin > mix-decalin > trans-decalin. This work demonstrates the relationship between the cis/trans structures and the pyrolysis performance of decalin, which provides a better understanding of the structure-activity relationships of endothermic hydrocarbon fuels.

Keywords： endothermic fuel     decalin     pyrolysis     heat sink     molecular structure    

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Enhanced separation of tetrafluoropropanol from water via carbon nanotubes membranes: insights from molecular

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 11, doi: 10.1007/s11783-023-1740-y

Abstract:

● MD simulations unveil the transport mechanism for TFP-water mixture through CNTs.

Keywords： Fluorinated alcohol     Carbon nanotube     Molecular simulation     Fluorine modified    

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Effect of ligand chain length on hydrophobic charge induction chromatography revealed by molecular dynamics

Lin ZHANG, Yan SUN

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 4,   Pages 456-463 doi: 10.1007/s11705-013-1357-y

Abstract: adsorption, desorption, and conformational transition of the proteins with CL2 and CL4 were examined using molecular

Keywords： adsorption     desorption     irreversibility     protein conformational transition     molecular dynamics simulation    

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Title Author Date Type Operation

A General Strategy to Electrospin Nanofibers with Ultrahigh Molecular Chain Orientation

Xian Wen, Jian Xiong, Zhaoyang Sun, Liming Wang, Jianyong Yu, Xiaohong Qin

Journal Article

Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC

Chung Nguyen VAN; Hai TRAN THANH; Thuc Nhu NGUYEN; Jianchun LI

Journal Article

Crystallographic orientation effect on cutting-based single atomic layer removal

Wenkun XIE, Fengzhou FANG

Journal Article

Tomographic diagnosis of defects in hydraulic concrete structure

ZHAO Mingjie, XU Xibin

Journal Article

Planar jumping with stable landing through foot orientation design and ankle joint control

Qilong YUAN, I-Ming CHEN

Journal Article

Build orientation determination of multi-feature mechanical parts in selective laser melting via multi-objective

Journal Article

Special issue on “Molecular Sensors and Molecular Logic Gates”

Luling Wu , Tony D. James

Journal Article

Design of bio-oil additives via molecular signature descriptors using a multi-stage computer-aided molecular

Journal Article

Progress on molecular biomarkers and classification of malignant gliomas

Chuanbao Zhang, Zhaoshi Bao, Wei Zhang, Tao Jiang

Journal Article

Molecular classification and molecular targeted therapy of cancer

Miao Xu, Jianyong Shao, Yixin Zeng

Journal Article

Advances in Molecular Electronics: A Brief Review

Paven Thomas Mathew, Fengzhou Fang

Journal Article

Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Journal Article

Effect of / molecular structures on pyrolysis performance and heat sink of decalin isomers

Journal Article

Enhanced separation of tetrafluoropropanol from water via carbon nanotubes membranes: insights from molecular

Journal Article

Effect of ligand chain length on hydrophobic charge induction chromatography revealed by molecular dynamics

Lin ZHANG, Yan SUN

Journal Article