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| 1 | VECTRIX AND SOME OF ITS PROPERTIES SUITED TO FLIGHT DYNAMICS显示文摘VECTRIXANDSOMEOFITSPROPERTIESSUITEDTOFLIGHTDYNAMICS￥ChenWanchun;XiaoYelun(SchoolofAstronautics,BeijingUniversityofAeronautics... | Chen Wanchun Xiao Yelun (School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing, China, 100083) | 1996 | Chinese Journal of Aeronautics1996，9，2： | 4 |
| 2 | Three Tiaobu Feishen therapies protect human alveolar epithelial cells against cigarette smoking and tumor necrosis factor-mlear factor-kappa B pathwayα-induced inflamation by nuc显示文摘OBJECTIVE: To investigate the efficacy of Tiaobu Feishen formulae(TBFS), including Bufei Jianpi formula(BJF), Bufei Yishen formula(BYF), and Yiqi Zishen formula(YZF), on inflammatory response, protease-anti-protease imbalance and collagen deposition in rats.METHODS: In present work, we used an in vitro model of cigarette smoking extract(CSE)-and tumor necrosis factor-α(TNF-α)-induced A549 cellsto examine the efficacy of BJF, BYF and YZF on the production of inflammatory cytokines, including TNF-α and interleukin(IL)-8, IL-6, matrix metalloproteinases(MMP)-9, and IL-10 in CSE or TNF-ls. And their related transcripα-induced A549 celtion factors and signaling pathway were also analyzed.RESULTS: The results showed that BJF, BYF and YZF could significantly decrease the expression levels of the pro-inflammatory cytokines induced by CSE or TNF-α. Furthermore, BJF, BYF and YZF could suppress CSE-or TNF-α-induced activation of nuclear factor-kappa B(NF-κB) transcription factors and its corresponding pathways. Taken together, these data implied that BJF, BYF and YZF effectively inhibited CSE-or TNF-α-induced inflammatory response in alveolar epithelial cell, which was due to their inhibition effect on NF-κB pathways.CONCLUSION: Our findings suggest that the Tiaobu Feishen therapies may protect human alveolar epithelial cells against cigarette smoking and TNF-α-induced inflammation. NF-κB pathway may involve in the actions. | Chen Yulong Wu Yaosong Li Jiansheng Feng Suxiang Hao Lili Liu Xuefang Zheng Wanchun Dong Haoran Qin Yanqin Yin Sugai Zhao Peng | 2019 | Journal of Traditional Chinese Medicine2019，39，1： | 4 |
| 3 | Progress in Space Material Researches显示文摘New progress in the post researches on space grown materials, the development of experiment facilities, and the experiment techniques for space materials researches were introduced. Besides the conventional materials, such as alloys, semiconductors, and optical crystals, new materials have also been prepared on the ground. | CHEN Nuofu CHEN Wanchun LIU Yan HOU Yanfei LUO Xinghong HUANG Qing YU Yude | 2006 | 空间科学学报2006，26，z1： | 3 |
| 4 | Optimal terminal guidance for exoatmospheric interception显示文摘In this study, two optimal terminal guidance(OTG) laws, one of which takes into account the final velocity vector constraint, are developed for exoatmospheric interception using optimal control theory. In exoatmospheric interception, because the proposed guidance laws give full consideration to the effect of gravity, they consume much less fuel than the traditional guidance laws while requiring a light computational load. In the development of the guidance laws, a unified optimal guidance problem is put forward, where the final velocity vector constraint can be considered or neglected by properly adjusting a parameter in the cost function. To make this problem analytically solvable, a linear model is used to approximate the gravity difference, the difference of the gravitational accelerations of the target and interceptor. Additionally, an example is provided to show that some achievements of this study can be used to significantly improve the fuel efficiency of the pulsed guidance employed by the interceptor whose divert thrust level is fixed. | Yu Wenbin Chen Wanchun Yang Liang Liu Xiaoming Zhou Hao | 2016 | Chinese Journal of Aeronautics2016，29，4： | 3 |
| 5 | Progress of Microgravity Material Research During the Period of 2007-2009显示文摘Orbital experimental researches on crystal growth of Mn-doped GaSb and Bi2Se0.21Te2.79 are briefly summarized.The space experiments were completed in September of 2007 on broad the Foton-M3 satellite of Russia.Ground-based researches on the solidification behaviors of Al-Al3Ni,AlAl2Cu,Ag-Cu eutectic,Al-Pb monotectic and Cu-Co peritectic alloys in a 50-meter-high drop tube were investigated.New experimental results on the ultrasonic field and the temperature recycling induced to chiral symmetry breaking of NaClO3 crystal also were reported in the present paper. | Chen Nuofu Bai Yiming Chen Wanchun Zhou Yanfei Luo Xinghong Yu Yude | 2010 | 空间科学学报2010，30，5： | 3 |
| 6 | Closed form algorithm of double-satellite TDOA+AOA localization based on WGS-84 model显示文摘In this paper,we consider the double-satellite localization under the earth ellipsoid model of the Wideband Geodetic System(WGS-84)using the Time Difference of Arrival(TDOA)and the Angle-of-Arrival(AOA).Several closed-form solution algorithms via the pseudolinearization of the measurement equations are presented to efficiently estimate the location.These algorithms include the Weighted Least Squares(WLS),the Constrained Total Least Squares(CTLS),and the Taylor-Series Iteration(TSI).Performance comparison of the proposed methods with the Cramér-Rao Lower Bound(CRLB)in the simulation is shown to demonstrate that the proposed algorithms are feasible and have stable performance. | Wanchun LI Ruibin CHEN Yuning GUO Caixia FU | 2019 | Chinese Journal of Aeronautics2019，32，10： | 3 |
| 7 | Robust entry guidance using multi-segment linear pseudospectral model predictive control显示文摘This paper presents a robust entry guidance algorithm for the high lift-to-drag ratio entry vehicle that employs the recently developed pseudospectral model predict control in a segmented manner. Here, the guidance commands are the longitudinal liftto-drag(L/D) and bank reversal commands, which are calculated by successively solving multiple segment linear algebraic equations. These equations are derived using the linear pseudospectral method, control parametrization and calculus of variations. The method uses orthogonal polynomials and computes the updates through a series of analytical formulae, which makes it accurate and computationally effective. Moreover, it is able to adjust the number of bank reversals by providing the precise bank reversal point so as to fully exploit the potential of lateral maneuver.The method also employs proportional navigation and polynomial guidance after the last bank reversal to meet multiple terminal constraints. High-fidelity numerical simulations with various destinations are carried out to demonstrate its applicability. Furthermore, Monte Carlo simulations are also conducted to show that the proposed algorithm consistently offers very stable and robust performances and has superior performances in computational efficiency, guidance accuracy and lateral trajectory shaping capability in comparison with other typical methods. | Liang Yang Wanchun Chen Xiaoming Liu Hao Zhou | 2017 | Journal of Systems Engineering and Electronics2017，28，1： | 2 |
| 8 | Experimental study to confirm the existence of hydrocarbon under high pressure and temperature of deep lithosphere显示文摘Pyrolysis of lignite was conducted at high temperatures from 400 to 700℃ and high pres- sures of 1 and 3 GPa in a closed system in order to investigate pressure and temperature effects on or- ganic matter maturation. The data indicated that the total yield of liquid hydrocarbons decreased with increasing pressure and the maximum of production was obtained at a higher temperature. The alkanes show more mature characteristics with increasing temperature at a given pressure, conversely, high pressure significantly hinders the thermal evolution of geological organic matter. The experimental results also demonstrated that the relative abundance of high molecular weight hydrocarbons may exist under the conditions of the lower lithosphere, which not only breaks through the traditional concept that alkanes mainly present at stage of “oil window”, but also en- hances the possibility to find the oil in the high tem- perature and pressure areas. | WANG Chuanyuan DU Jianguo WANG Wanchun XIE Hongsen CHEN Guojun DUAN Yi ZHOU Xiaocheng | 2006 | Chinese Science Bulletin2006，51，13： | 2 |
| 9 | SaC‐FRAPP: a scalable and cost‐effective framework for privacy preservation over big data on cloud显示文摘 | Xuyun Zhang Chang Liu Surya Nepal Chi Yang Wanchun Dou Jinjun Chen | 2013 | Concurrency Computat: Pract Exper2013，，18： | 2 |
| 10 | Guidance law with circular no-fly zone constraint显示文摘 | Wenbin Yu Wanchun Chen | 2014 | Nonlinear Dynamics2014，，3： | 2 |
| 11 | On Design, Verification, and Dynamic Modification of the Problem-based Scientific Workflow Model显示文摘 | Liu Xiping Dou Wanchun Chen Jinjun | 2007 | Simulation Modeling Practice and Theory2007，15，9： | 1 |
| 12 | Study on flow characteristics of solid/liquid system in lysozyme crystal growth显示文摘During the process of lysozyme protein crystallization with batch method,the macroscopic flow field of solid/liquid system was observed by particle image velocimetry(PIV). Furthermore,a normal growth rate of(110) face and local flow field around a single protein crystal were obtained by a long work dis-tance microscope. The experimental results showed that the average velocity,the maximal velocity of macroscopic solid/liquid system and the velocity of local flow field around single protein crystal were fluctuant. The effective boundary layer thickness δeff,the concentration at the interface Ci and the characteristic velocity V were calculated using a convection-diffusion model. The results showed that the growth of lysozyme crystal in this experiment was dominated by interfacial kinetics rather than bulk transport,and the function of buoyancy-driven flow in bulk transport was small,however,the effect of bulk transport in crystal growth had a tendency to increase with the increase of lysozyme concentra-tion. The calculated results also showed that the order of magnitude of shear force was about 10-21 N,which was much less than the bond force between the lysozyme molecules. Therefore the shear force induced by buoyancy-driven flows cannot remove the protein molecules from the interface of crystal. | CUI HaiLiang YU Yong CHEN WanChun KANG Qi | 2007 | Chinese Science Bulletin2007，52，9： | 1 |
| 13 | On design, verification, and dynamic modification of the problem - based scientific workflow model 显示文摘 | Liu Xiping Dou Wanchun Chen Jinjun | 2007 | Simulation Modeling Practice and Theory2007，，： | 1 |
| 14 | SaC‐FRAPP: a scalable and cost‐effective framework for privacy preservation over big data on cloud显示文摘 | Xuyun Zhang Chang Liu Surya Nepal Chi Yang Wanchun Dou Jinjun Chen | 2013 | Concurrency Computat.: Pract. Exper2013，，18： | 1 |
| 15 | Syntheticasymptote formulas of asymmetric edge-coupled striplines显示文摘 | TANG Wanchun YU Zhengyong CHEN Xuemei | 2008 | Microwave and Optical Technology Letters2008，50，3： | 1 |
| 16 | Study of the morphologies and dielectric constants of nanoporous materials derived from benzoxazine-terminated poly(ε-caprolactone)/polybenzoxazine co-polymers显示文摘 | Yiche Su Wanchun Chen Kaiiin Oua | 2005 | Polymer2005，46，： | 1 |
| 17 | Synthetic Asymptote Formulas of Asymmetric Edge-Coupled Striplines 显示文摘 | TANG Wanchun YU Zhengyong CHEN Xuemei | 2008 | Microwave and Optical Technology Letters2008，50，3： | 1 |
| 18 | Application of linear gauss pseudospectral method in model predictive control显示文摘 | Liang Yang Hao Zhou Wanchun Chen | 2013 | Acta Astronautica2013，，： | 1 |
| 19 | Trajectory-Shaping Guidance with final speed and load factor constraints显示文摘 | Wenbin Yu Wanchun Chen | 2014 | ISA Transactions2014，，： | 1 |
| 20 | Growth of α-LiIO_(3) Single Crystal Grown in Space显示文摘α-LiIO_(3) single crystals were grown by the aqueous solution method in a Chinese scientific return-satellite.The morphology of the crystals grown in space are similar to that of earth-grown crystals.It is found that the growth rates of the positive and negative sides of the space-grown crystals are almost the same.The perfection of both crystals grown in space and on earth was examined. | MAI Zhenhong CHEN Wanchun CUI Shufan MA Wenyi XIE Anyun XU Lu JIN Zecen CHEN Gang | 1991 | Chinese Physics Letters1991，8，4： | 1 |
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