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| 1 | Design of Time-constrained Guidance Laws via Virtual Leader Approach显示文摘Guidance problems with flight time constraints are considered in this article.A new virtual leader scheme is used for design of guidance laws with time constraints.The core idea of this scheme is to adopt a virtual leader for real missiles to convert a guidance problem with time constraints to a nonlinear tracking problem,thereby making it possible to settle the problem with a variety of control methods.A novel time-constrained guidance(TCG) law,which can control the flight time of missiles to a prescribed time,is designed by using the virtual leader scheme and stability method.The TCG law is a combination of the well-known proportional navigation guidance(PNG) law and the feedback of flight time error.What's more,this law is free of singularities and hence yields better performances in comparison with optimal guidance laws with time constraints.Nonlinear simulations demonstrate the effectiveness of the proposed law. | Zhao Shiyu Zhou Rui Wei Chen Ding Quanxin | 2010 | Chinese Journal of Aeronautics2010，23，1： | 36 |
| 2 | Dynamic attack zone of air-to-air missile after being launched in random wind field显示文摘A new concept is presented for air-to-air missile which is dynamic attack zone after being launched in random wind field. This new concept can be used to obtain the 4-dimensional(4-D)information regarding the dynamic envelope of an air-to-air missile at any flight time aimed at different flight targets considering influences of random wind, in the situation of flight fighters cooperated with missiles fighting against each other. Based on an air-to-air missile model, some typical cases of dynamic attack zone after being launched in random wind field were numerically simulated.Compared with the simulation results of traditional dynamic envelope, the properties of dynamic attack zone after being launched are as follows. The 4-D dynamic attack zone after being launched is inside traditional maximum dynamic envelope, but its forane boundary is usually not inside traditional no-escape dynamic envelope; Traditional dynamic attack zone can just be reliably used at launch time, while dynamic envelope after being launched can be reliably and accurately used during any flight antagonism time. Traditional envelope is a special case of dynamic envelope after being launched when the dynamic envelope is calculated at the launch time; the dynamic envelope after being launched can be influenced by the random wind field. | Hui Yaoluo Nan Ying Chen Shaodong Ding Quanxin Wu Shengliang | 2015 | Chinese Journal of Aeronautics2015，28，5： | 16 |
| 3 | Combined indirect and direct method for adaptive fuzzy output feedback control of nonlinear system显示文摘A novel control method for a general class of nonlinear systems using fuzzy logic systems (FLSs) is presertted. Indirect and direct methods are combined to design the adaptive fuzzy output feedback controller and a high-gain observer is used to estimate the derivatives of the system output. The closed-loop system is proven to be semiglobally uniformly ultimately bounded. In addition, it is shown that if the approximation accuracy of the fuzzy logic system is high enough and the observer gain is chosen sufficiently large, an arbitrarily small tracking error can be achieved. Simulation results verify the effectiveness of the newly designed scheme and the theoretical discussion. | Ding Quanxin Chen Haitong Jiang Changsheng Chen Zongji | 2007 | Journal of Systems Engineering and Electronics2007，18，1： | 2 |
| 4 | Adaptive Variable Structure Multiple Model Filter for High Maneuvering Tar- get Tracking显示文摘 | Ding Quanxin Liang Guowei Tian Ye | 2010 | ICCIS2010，，： | 1 |
| 5 | Adaptive Variable Structure Multiple Model Filter for High Maneuvering Target Tracking 显示文摘 | Ding Quanxin Liang Guowei | 2010 | ICCIS2010，，： | 1 |
| 6 | Consecutive topological transitions of helical Fermi arcs at saddle points in CoSi显示文摘The CoSi family hosts unconventional topological nodes with nonzero Chern numbers.The nontrivial topology is manifested by conspicuous surface Fermi arcs connecting surface projections of the nodes.Here,using angle-resolved photoemission spectroscopy,we have systematically investigated the(001)surface states of pristine and Ni-doped Co Si.The surface states form saddle-like band structures at/near the time-reversal invariant point near the Fermi level.The Fermi arcs undergo consecutive Lifshitz transitions at the saddle points X,leading to changes of the Fermi arc configuration.As the density of states has a van Hove singularity at the saddle points,exotic many-body physical phenomena may emerge accompanied by the topological transitions of surface Fermi arcs. | Zhicheng Rao Shangjie Tian Shunye Gao Quanxin Hu Wenhui Fan Jierui Huang Cenyao Tang Yaobo Huang Hechang Lei Yujie Sun Tian Qian Hong Ding | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，5： | 0 |
| 7 | Studies on plasma-activated perilla seed oil:Diagnosis,optimisation,and validation of reactive species显示文摘Recently,the applications of cold atmospheric plasma(CAP)in liquid treatment have attracted increasing attention owing to its excellent medical efficacy.It has been proved that CAP can effectively enhance the biological activity of vegetable oils due to the generation of reactive species.Optimising the reactor parameter is an important approach to regulate reactive species in plasma-activated oil to obtain better biological effects.In this study,a self-made jet array driven by a pulsed power supply was used to generate large-area plasma to irradiate perilla seed oil(PSO),with the formation of plasmaactivated perilla seed oil(PAPSO).By means of laser-induced fluorescence and chemical titration,the relative density of hydroxyl radical radical in plasma jet,as well as the activity of PAPSO were measured under different discharge parameters,and realised the control of the activity of PAPSO.In vitro experiments showed that PAPSO significantly enhanced its ability to inhibit cancer cells proliferation and induce apoptosis after plasma treatment,which provides a reference for cancer treatment.This study is helpful to further understand the influence of plasma dose effect on the activity of media and provide guidance for related plasma medical applications. | Xiaolong Wang Jun Liu Quanxin Li Lian Li Shanrui Li Yunhan Ding Tong Zhao Ying Sun Yuantao Zhang | 2023 | High Voltage2023，8，4： | 0 |
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