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Study on the molecular characteristic in phlegm-dampness constitution

Wang Qi,Dong Jing,Wu Hongdong,Wang Dongpo,Yao Shilin,Ren Xiaojuan

Strategic Study of CAE 2008, Volume 10, Issue 7,   Pages 100-103

Abstract:

To investigate the molecular mechanism for phlegm-dampness constitutionbrown fat cell differentiation, gluconeogenesis and thermoregulation.These results indicate that the Molecularcharacteristic of phlegm-dampness constitution is related to metabolism disorder.

Keywords： phlegm-dampness constitution     Genechip Mapping Array     Molecular characteristic    

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Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 1,   Pages 32-36 doi: 10.1007/s11465-007-0005-y

Abstract: The research about hysteresis characteristic of finger seal (FS), which was carried out based on theA mass spring damper dynamics model of FS system was proposed and the hysteresis characteristic of theThis work shows that the dynamics characteristic analysis of the FS is necessary and the dynamics model

Keywords： FS     necessary     hysteresis characteristic     optimization     spring    

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Flow characteristic and wastewater treatment performance of a pilot-scale airlift oxidation ditch

Hongtao PANG, Hanchang SHI, Huiming SHI,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 4,   Pages 470-476 doi: 10.1007/s11783-009-0143-z

Abstract: diffuser and baffle as aerator was operated in a wastewater treatment plant (WWTP) to investigate its flow characteristic

Keywords： airlift oxidation ditch     flow characteristic     wastewater treatment    

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Weak characteristic information extraction from early fault of wind turbine generator gearbox

Xiaoli XU, Xiuli LIU

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 357-366 doi: 10.1007/s11465-017-0423-4

Abstract:

Given the weak early degradation characteristic information during early fault evolution in gearboxA weak characteristic information extraction based on µ-SVD and local mean decompositionExperimental results show that this method can significantly weaken signal noise, effectively extract the weak characteristic

Keywords： wind turbine generator gearbox     µ-singular value decomposition     local mean decomposition     weak characteristic    

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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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Fractal characteristic evaluation and interpolation reconstruction for surface topography of drilled

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 840-854 doi: 10.1007/s11465-021-0643-5

Abstract: In this paper, an improved fractal interpolation model is proposed to reconstruct the surface topography of composite hole wall. This model adopts the maximum positive deviations and maximum negative deviations between the measured values and trend values to determine the contraction factors. Hole profiles in 24 directions are measured. Fractal parameters are calculated to evaluate the measured surface profiles. The maximum and minimum fractal dimension of the hole wall are 1.36 and 1.07, whereas the maximum and minimum fractal roughness are 4.05 × 10 −5 and 4.36 × 10 −10 m, respectively. Based on the two-dimensional evaluation results, three-dimensional surface topographies in five typical angles (0°, 45°, 90°, 135°, and 165°) are reconstructed using the improved model. Fractal parameter D s and statistical parameters Sa, Sq, and Sz are used to evaluate the reconstructed surfaces. Average error of D s, Sa, Sq, and Sz between the measured surfaces and the reconstructed surfaces are 1.53%, 3.60%, 5.60%, and 9.47%, respectively. Compared with the model in published literature, the proposed model has equal reconstruction effect in relatively smooth surface and is more advanced in relatively rough surface. Comparative results prove that the proposed model for calculating contraction factors is more reasonable.

Keywords： surface topography     fractal evaluation     fractal interpolation     reconstruction     composite    

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Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 2,   Pages 127-132 doi: 10.1007/s11709-013-0200-3

Abstract: However, there is a lack of operating characteristic research in this region, especially the energy consumption

Keywords： ultra-thin floor heating panel     the preheating time     thermal comfort     energy saving    

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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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Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0735-x

Abstract: Servo-hydraulic actuators (SHAs) are widely used in mechanical equipment to drive heavy-duty mechanisms. However, their energy efficiency is low, and their motion characteristics are inevitably affected by uncertain nonlinearities. Electromechanical actuators (EMAs) possess superior energy efficiency and motion characteristics. However, they cannot easily drive heavy-duty mechanisms because of weak bearing capacity. This study proposes and designs a novel electromechanical-hydraulic hybrid actuator (EMHA) that integrates the advantages of EMA and SHA. EMHA mainly features two transmission mechanisms. The piston of the hydraulic transmission mechanism and the ball screw pair of the electromechanical transmission mechanism are mechanically fixed together through screw bolts, realizing the integration of two types of transmission mechanisms. The control scheme of the electromechanical transmission mechanism is used for motion control, and the hydraulic transmission mechanism is used for power assistance. Then, the mathematical model, structure, and parameter design of the new EMHA are studied. Finally, the EMHA prototype and test platform are manufactured. The test results prove that the EMHA has good working characteristics and high energy efficiency. Compared with the valve-controlled hydraulic cylinder system, EMHA exhibits a velocity tracking error and energy consumption reduced by 49.7% and 54%, respectively, under the same working conditions.

Keywords： electromechanical-hydraulic hybrid actuator (EMHA)     integration     transmission mechanisms     power assistance     energy efficiency     working characteristics    

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Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 1,   Pages 9-9 doi: 10.1007/s11465-021-0665-z

Abstract: Gear wear is one of the most common gear failures, which changes the mesh relationship of normal gear. A new mesh relationship caused by gear wear affects meshing excitations, such as mesh stiffness and transmission error, and further increases vibration and noise level. This paper aims to establish the model of mesh relationship and reveal the vibration characteristics of external spur gears with gear wear. A geometric model for a new mesh relationship with gear wear is proposed, which is utilized to evaluate the influence of gear wear on mesh stiffness and unloaded static transmission error (USTE). Based on the mesh stiffness and USTE considering gear wear, a gear dynamic model is established, and the vibration characteristics of gear wear are numerically studied. Comparison with the experimental results verifies the proposed dynamic model based on the new mesh relationship. The numerical and experimental results indicate that gear wear does not change the structure of the spectrum, but it alters the amplitude of the meshing frequencies and their sidebands. Several condition indicators, such as root-mean-square, kurtosis, and first-order meshing frequency amplitude, can be regarded as important bases for judging gear wear state.

Keywords： gear wear     mesh relationship     mesh stiffness     transmission error     vibration characteristics    

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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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Title Author Date Type Operation

Study on the molecular characteristic in phlegm-dampness constitution

Wang Qi,Dong Jing,Wu Hongdong,Wang Dongpo,Yao Shilin,Ren Xiaojuan

Journal Article

Analysis of the dynamic hysteresis characteristic of finger seal

LEI Yanni, CHEN Guoding

Journal Article

Flow characteristic and wastewater treatment performance of a pilot-scale airlift oxidation ditch

Hongtao PANG, Hanchang SHI, Huiming SHI,

Journal Article

Weak characteristic information extraction from early fault of wind turbine generator gearbox

Xiaoli XU, Xiuli LIU

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

Fractal characteristic evaluation and interpolation reconstruction for surface topography of drilled

Journal Article

Operating characteristic analysis on the ultra-thin low temperature floor-heating system

Hualing ZHANG, Xiaopeng SONG

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

Design and characteristic research of a novel electromechanical-hydraulic hybrid actuator with two transmission

Journal Article

Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Journal Article

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

Journal Article