全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
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作者:Li Yuan , Cheng Zhixue ...
来源:[J].BMC molecular biology(IF 2.796), 2019, Vol.20 (1), pp.19PubMed
摘要:BACKGROUND(#br)Many miRNA functions have been revealed to date. Single miRNAs can participate in life processes by regulating more than one target gene, and more than one miRNA can also simultaneously act on one target mRNA. Thus, a complex regulatory network involved in many pro...
作者:Li Huifeng , Rao sihong ...
来源:[C].2015 International Conference on Materials,Environmental and Biological Engineering(MEBE 2015)2015CNKI
摘要:Analysis of turbulence on the naphthenic acid corrosion specimens under scouring of 90m/s high flow rate fluid by Fluent indicated that maximum turbulence existed at the center of specimen,the turbulence in other zones decreased nonlinearly with the distance from the center.The a...
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作者:Li Huifeng
来源:[C].2017 2nd International Conference on Education,Sports,Arts and Management Engineering(ICESAME 2017)2017CNKI
摘要:The reform of compensation mechanism is the focus and difficulty of public hospital reform in recent years. Although the reform of compensation mechanism brings new development opportunities for the development of public hospitals, the development of opportunities often hides new...
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作者:Zhang Qiuhong , Li Zhaoying , Li Huifeng
来源:[C].Proceedings of 2014 26th Chinese Control and Decision Conference(ccdc)2014CNKI
摘要:A direct method is discussed for multistage launch vehicle ascent trajectory optimization. First the optimal control problem is modeled with the performance index as maximum terminal mass. A modified Gauss Pseudospectral method is used to design a rapid optimal algorithm for mult...
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作者:Li Huifeng , Liu Ju ...
来源:[C].2015 International Conference on Materials,Environmental and Biological Engineering(MEBE 2015)2015CNKI
摘要:The turbulence and flow rate around the specimens were analyzed by Fluent and results indicated that specimens installed in the pipeline varied the fluid flow direction,highly increased the flow rate nearby and formed strong turbulence around the specimens,the max turbulence in w...
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作者:LONG ShiKe , LI HuiFeng
来源:[C].Proceedings of the 34th Chinese Control Conference2015CNKI
摘要:This paper presents a new online trajectory generation solution for reusable launch vehicles(RLV) during approach and landing(A&L). This new solution considers initial dynamic pressure constraints and overload jumps along the trajectory. First this new solution designs a referenc...
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作者:NIE Wenming , WANG Zhi , LI Huifeng
来源:[C].Proceedings of the 34th Chinese Control Conference2015CNKI
摘要:This paper presents a new attitude controller design method for underactuated reentry vehicles. Inverse dynamic method can't be applied to a non-minimum phase system directly, while non-minimum phase problem is inevitable for underactuated reentry vehicles. In order to adopt inve...
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作者:Sun Shan , Li Huifeng , Zhang Ran
来源:[C].Proceedings of the 34th Chinese Control Conference2015CNKI
摘要:Using only two body flaps to control the attitude of the reentry vehicle, belonging to under-actuated system, probably lead to unstable internal dynamics in lateral movement. In order to solve the problem, based on using output-redefinition to stabilize internal dynamic, a predic...
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作者:Guo Yaze , Zhang Ran , Li Huifeng
来源:[C].Proceedings of the 35th Chinese Control Conference2016CNKI
摘要:In this paper, the problem of trajectory tracking is researched and an effective control scheme based on disturbance observers(DOB) is presented for quadrotors to deal with the influences caused by time-varying mass, inertia and other uncertainties. The control scheme proposed he...
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作者:LI Huifeng , GONG Chunye
来源:[C].Proceedings of the 35th Chinese Control Conference2016CNKI
摘要:In this paper, fractional-order calculus(FC) is applied in the sliding mode control of a generic hypersonic vehicle(GHV). In the design of the controller, dynamic inversion is applied to deal with strong couplings among pitch angle, yaw angle and roll angle. The effect of FC is e...
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