4篇
您的检索式：作者名="Mingying Shi"
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| 1 | Fast cooperative trajectory optimization and test verification for close-range satellite formation using Finite Fourier Series method显示文摘The process of formation reconfiguration for close-range satellite formation should take into account the risk of collisions between satellites.To this end,this paper presents a method to rapidly generate low-thrust collision-avoidance trajectories in the formation reconfiguration using Finite Fourier Series(FFS).The FFS method can rapidly generate the collision-avoidance threedimensional trajectory.The results obtained by the FFS method are used as an initial guess in the Gauss Pseudospectral Method(GPM)solver to verify the applicability of the results.Compared with the GPM method,the FFS method needs very little computing time to obtain the results with very little difference in performance index.To verify the effectiveness,the proposed method is tested and validated by a formation control testbed.Three satellite simulators in the testbed are used to simulate two-dimensional satellite formation reconfiguration.The simulation and experimental results show that the FFS method can rapidly generate trajectories and effectively reduce the risk of collision between satellites.This fast trajectory generation method has great significance for on-line,constantly satellite formation reconfiguration. | Mingying HUO Zichen FAN Naiming QI Zhiguo SONG Xin SHI | 2020 | Chinese Journal of Aeronautics2020，33，8： | 3 |
| 2 | Application of Biochemical Fulvic Acid Potassium in Transplantation of Trees显示文摘[Objective]The paper was to clarify the application of biochemical fulvic acid potassium on the survival rate and growth of various trees transplanted in the process of landscaping.[Method]Two experimental treatments(i.e.decomposed organic fertilizer+biochemical fulvic acid potassium water soluble fertilizer,decomposed organic fertilizer+compound fertilizer)were designed to determine the changes in physical and chemical properties before and after soil treatment,and the survival rate,plant height and ground diameter of four different cultivated plants within one year,and the effects of applying biochemical fulvic acid potassium on cultivated plants were investigated.[Result]The soil organic matter,total nitrogen,alkali-hydrolyzable nitrogen,soil available phosphorus,soil available potassium and p H value in the soil treated with decomposed organic fertilizer+biochemical fulvic acid potassium soluble fertilizer,and decomposed organic fertilizer+compound fertilizer increased significantly,and the soil bulk density decreased obviously.The survival rates,plant heights and ground diameters of four different cultivated plants were significantly improved after application of decomposed organic fertilizer+biochemical fulvic acid potassium water soluble fertilizer,and decomposed organic fer-tilizer+compound fertilizer(P<0.05).[Conclusion]The application of biochemical fulvic acid potassium on cultivated plants effectively improved soil fertility,increased the utilization of nitrogen,phosphorus and potassium,improved the growth of plants,and promoted the growth of landscaping plants after transplantation. | Yang Qunhui He Xiang Bi Yunqing Yang Peiwen Zhang Qing Yang Mingying Shi Zhufeng Peng Rongzhen Wang Jiayin | 2020 | Plant Diseases and Pests2020，11，2： | 1 |
| 3 | The Passive Constructoon and Its Pragmatic Background显示文摘本文集中讨论了被动语态以及相关的背景及理论知识。同时也给出了被动结构的定义及其语法。 | Shi Mingying(Language Department,Lhasa 850000,China) | 2001 | 西藏大学学报(社会科学版)2001，16，1： | 0 |
| 4 | Catalytic asymmetric oxidative sulfenylation of β-ketocarbonyls using a chiral primary amine显示文摘Enantioselective oxidative construction of a C(sp^(3))–S bond has been achieved using a chiral primary amine catalyst in the presence of tert-butyl hydroperoxide and a catalytic amount of tetrabutylammonium iodide.The distinctive feature of the current reaction is coupling with nucleophilic sulfur reactants under oxidative conditions.This protocol provides facile access to chiral thioethers bearing S-containing quaternary stereocenters with good chemo-and enantiocontrol. | Qi Zhang Mingying Shi Xueling Mi Sanzhong Luo | 2022 | Organic Chemistry Frontiers2022，9，5： | 0 |
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