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Investigation of the Influence of Pitch/Lag on Helicopter AirResonance Stability

Xue Haifeng,Xiang Jinwu,Zhang Xiaogu,Li Shuqiang

Strategic Study of CAE 2007, Volume 9, Issue 9,   Pages 58-62

Abstract:

The influence of pitch/lag coupling on helicopter air resonance is investigated First,  helicopter air resonance equations of motion considering pitch/lag coupling is derived,  related analysis model and calculation programs are built to study the effect of pitch/lag coupling The results indicated that the positive pitch/lag coupling can restrain the instability of helicopter/lag structure coupling and pitch/lag coupling together.

Keywords： helicopter     dynamics instability     helicopter air resonance     pitch/lag coupling    

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CRISPR-Cas9 mediated LAG-3 disruption in CAR-T cells

Yongping Zhang, Xingying Zhang, Chen Cheng, Wei Mu, Xiaojuan Liu, Na Li, Xiaofei Wei, Xiang Liu, Changqing Xia, Haoyi Wang

Frontiers of Medicine 2017, Volume 11, Issue 4,   Pages 554-562 doi: 10.1007/s11684-017-0543-6

Abstract: One negative regulator of T cell activity is lymphocyte activation gene-3 (LAG-3).We successfully generated LAG-3 knockout T and CAR-T cells with high efficiency using LAG-3 knockout CAR-T cells displayed robust antigen-specific antitumor activity in

Keywords： CAR-T     CRISPR-Cas9     LAG-3    

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Development of a redundant anthropomorphic hydraulically actuated manipulator with a roll–pitch–yaw spherical

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 698-710 doi: 10.1007/s11465-021-0646-2

Abstract: seven-degree-of-freedom (7-DOF) redundant anthropomorphic hydraulically actuated manipulator with a novel roll–pitch–yawspherical wrist design, which consists of two parallel linear hydraulic cylinders to drive the yaw/pitch

Keywords： hydraulic manipulator     inverse kinematic     redundant design     spherical wrist    

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Dynamic behavior of superheated steam and ways of control

LI Xu

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 25-30 doi: 10.1007/s11708-008-0014-5

Abstract: ., the twin lead/lag loop which is facile for engineering applications, is used in superheated steam

Keywords： engineering     investment     Numerous simulation     lead/lag     temperature    

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Power maximization of variable-speed variable-pitch wind turbines using passive adaptive neural fault

Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 3,   Pages 377-388 doi: 10.1007/s11465-017-0431-4

Abstract: This paper studies the control methodology for variable-speed variable-pitch wind turbines includingwind speed and model noises, and completely unknown actuator faults including generator torque and pitch

Keywords： wind turbine nonlinear model     maximum power tracking     passive fault tolerant control     adaptive neural control    

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Microdamage study of granite under thermomechanical coupling based on the particle flow code

Frontiers of Structural and Civil Engineering   Pages 1413-1427 doi: 10.1007/s11709-023-0953-2

Abstract: The thermomechanical coupling of rocks refers to the interaction between the mechanical and thermodynamicThe study of this coupling interaction is essential for understanding the mechanical and thermodynamicA series of numerical thermomechanical coupling tests are then conducted to calibrate the micro-parameters

Keywords： thermomechanical coupling effect     granite     improved linear parallel bond model     thermal property     particle    

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An investigation on modification mechanism of CH

Qiang XIN, Shanghong HUANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 293-300 doi: 10.1007/s11709-017-0403-0

Abstract: concentrated sulfuric acid is used as catalyst, and the chemical modification of low temperature coal tar pitch

Keywords： low temperature     coal tar pitch     modification     road performance    

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Simulation of steel beam under ceiling jet based on a wind–fire–structure coupling model

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 78-98 doi: 10.1007/s11709-022-0936-8

Abstract: Instead of applying the concept of adiabatic surface temperature (AST) to achieve fluid–structure coupling

Keywords： CFD–FEM coupling     steel beam     wind     ceiling jet     numerical heat transfer    

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Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted

Liangbi WANG, Zhimin LIN, Kangjie SUN, Yuanxin DONG, Song LIU, Yongheng ZHANG,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 333-345 doi: 10.1007/s11708-009-0061-6

Abstract: This paper focused on the effect of transversal tube pitch on the local heat transfer performance ofOn the fin surface, constructing the flow channel but without mounted VGs, the transversal tube pitchtube unit of heat exchanger for commonly used fin materials and fin thickness, the transversal tube pitchLarge transversal tube pitch is more sensitive to fin material than to fin thickness.

Keywords： heat transfer enhancement     vortex generator     finned flat tube bank     heat exchanger    

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catalysts derived from zeolitic imidazolate framework@MXene composites for efficient oxidative self-coupling

Frontiers of Chemical Science and Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11705-023-2378-9

Abstract: The catalytic efficiency of the catalyst is tested for the self-coupling of 4-methoxybenzylamine to produce

Keywords： MXene     sacrificial template     oxidative self-coupling     Co nanoparticles     imine    

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Investigation on the performance and detoxification of modified low temperature coal tar pitch

Fengyan SUN, Yu LIU

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 315-321 doi: 10.1007/s11709-017-0386-x

Abstract: In this paper, studies on the modification on the low temperature coal tar pitch extracted from coalFirst, the low temperature coal tar pitch in liquid state is solidified with a higher softening pointThe modified coal tar pitch can achieve the standard pavement performance requirements.and physical modification additives on the mechanical performance and toxic properties of coal tar pitchmechanism is also studied, which further promote the applicability of modified low temperature coal tar pitch

Keywords： coal tar pitch     low temperature     modification     detoxification    

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Effect of alkyl nitrite decomposition on catalytic performance of CO coupling reaction over supported

Zhenhua LI, Weihan WANG, Dongxue YIN, Jing LV, Xinbin MA

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 4,   Pages 410-414 doi: 10.1007/s11705-012-1213-5

Abstract: The syntheses of dimethyl oxalate (DMO) and diethyl oxalate (DEO) by CO coupling reaction in gaseous

Keywords： palladium     CO coupling     dialkyl oxalate     alkyl nitrite     decomposition    

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Thermodynamic and economic analyses of a coal and biomass indirect coupling power generation system

Buqing YE, Rui ZHANG, Jin CAO, Bingquan SHI, Xun ZHOU, Dong LIU

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 590-606 doi: 10.1007/s11708-020-0809-6

Abstract: The coal and biomass coupling power generation technology is considered as a promising technology forIn this paper, a novel coal and biomass indirect coupling system is proposed based on the technologyFor the sake of comparison, a coal and biomass direct coupling system is also introduced based on theThe process of the direct and the indirect coupling system is simulated.worse, but the economic performance is better than that of the direct coupling system.

Keywords： biomass     indirect coupling system     process simulation     thermodynamic analysis     economic analysis    

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Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1801-1808 doi: 10.1007/s11705-023-2325-9

Abstract: Improving the aromatic selectivity in the alkane aromatization process is of great importance for its practical utilization but challenge to make because the high H/C ratio of alkanes would lead to a serious hydrogen transfer process and a large amount of light alkanes. Herein, CO2 is introduced into the cyclohexane conversion process on the HZSM-5 zeolite, which can improve the aromatic selectivity. By optimizing the reaction conditions, an improved aromatic (benzene, toluene, xylene, and C9+) selectivity of 48.2% can be obtained at the conditions of 2.7 MPa (CO2), 450 °C, and 1.7 h−1, which is better than that without CO2 (aromatic selectivity = 43.2%). In situ transmission Fourier transform infrared spectroscopy spectra illustrate that many oxygenated chemical intermediates (e.g., carboxylic acid, anhydride, unsaturated aldehydes/ketones or ketene) would be formed during the cyclohexane conversion process in the presence of CO2. 13C isotope labeling experimental results demonstrate that CO2 can enter into the aromatics through the formation of oxygenated chemical intermediates and thereby improve the aromatic selectivity. This study may open a green, economic, and promising way to improve the aromatic selectivity for alkane aromatization process.

Keywords： aromatics     carbon dioxide     aromatization     coupling reaction     ZSM-5 zeolite    

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Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling

Yun Liu, Youquan Zhu, Chaojun Li

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 3-8 doi: 10.1007/s11705-017-1693-4

Abstract: A mild and efficient synthesis for the biaryl acids via rhodium-catalyzed cross-dehydrogenative coupling

Keywords： biaryl acids     cross-dehydrogenative coupling     rhodium-catalyzed    

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Title Author Date Type Operation

Investigation of the Influence of Pitch/Lag on Helicopter AirResonance Stability

Xue Haifeng,Xiang Jinwu,Zhang Xiaogu,Li Shuqiang

Journal Article

CRISPR-Cas9 mediated LAG-3 disruption in CAR-T cells

Yongping Zhang, Xingying Zhang, Chen Cheng, Wei Mu, Xiaojuan Liu, Na Li, Xiaofei Wei, Xiang Liu, Changqing Xia, Haoyi Wang

Journal Article

Development of a redundant anthropomorphic hydraulically actuated manipulator with a roll–pitch–yaw spherical

Journal Article

Dynamic behavior of superheated steam and ways of control

LI Xu

Journal Article

Power maximization of variable-speed variable-pitch wind turbines using passive adaptive neural fault

Hamed HABIBI, Hamed RAHIMI NOHOOJI, Ian HOWARD

Journal Article

Microdamage study of granite under thermomechanical coupling based on the particle flow code

Journal Article

An investigation on modification mechanism of CH

Qiang XIN, Shanghong HUANG

Journal Article

Simulation of steel beam under ceiling jet based on a wind–fire–structure coupling model

Journal Article

Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted

Liangbi WANG, Zhimin LIN, Kangjie SUN, Yuanxin DONG, Song LIU, Yongheng ZHANG,

Journal Article

catalysts derived from zeolitic imidazolate framework@MXene composites for efficient oxidative self-coupling

Journal Article

Investigation on the performance and detoxification of modified low temperature coal tar pitch

Fengyan SUN, Yu LIU

Journal Article

Effect of alkyl nitrite decomposition on catalytic performance of CO coupling reaction over supported

Zhenhua LI, Weihan WANG, Dongxue YIN, Jing LV, Xinbin MA

Journal Article

Thermodynamic and economic analyses of a coal and biomass indirect coupling power generation system

Buqing YE, Rui ZHANG, Jin CAO, Bingquan SHI, Xun ZHOU, Dong LIU

Journal Article

Enhancing the aromatic selectivity of cyclohexane aromatization by CO2 coupling

Journal Article

Mild and highly regioselective synthesis of biaryl acids via Rh(I)-catalyzed cross-dehydrogenative coupling

Yun Liu, Youquan Zhu, Chaojun Li

Journal Article