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| 1 | Necessary and sufficient conditions for normalization and sliding mode control of singular fractional-order systems with uncertainties显示文摘The sliding mode control(SMC) problem for a normalized singular fractional-order system(SFOS) with matched uncertainties was investigated. Firstly, SFOS was normalized under constrained conditions. Then, the linear sliding mode(SM) function was designed using a fractional-order(FO) positive definite matrix and a linear matrix inequality(LMI). The SM controller was subsequently constructed based on switching laws. Finally, the feasibility of the method was evaluated using a numerical example. | Bo MENG Xinhe WANG Ziye ZHANG Zhen WANG | 2020 | Science China(Information Sciences)2020，63，5： | 4 |
| 2 | Catalogue of Eucnemidae(Coleoptera: Elateroidea) in China显示文摘This catalogue records the Eucnemidae species in China,including 15 genera,namely Isorhipis Lacordaire,1835,Melasis Olivier,1790,Calyptocerus Guérin-Méneville,1843,Hylis Gozis,1886,Epiphanis Eschscholtz,1829,Farsus Jacquelin du Val,1860,Microrhagus Dejean,1833,Dyscharachthis Blackburn,1900,Galbites Fleutiaux,1918,Procladidus Fleutiaux,1921,Pseudochapianus Lucht,1987,Raapia Fleutiaux,1899,Scython Laporte,1835,Serrifornax Fleutiaux,1926,Fornax Laporte,1835 and 25 species,belonging to 3 subfamilies:Melasinae,Eucneminae,and Macraulacinae,respectively.The taxonomy in the catalogue is based on the present classification system follows Muona. | Ziye Meng Xiaoqin Chen Yuna Sun Yongying Ruan Shihong Jiang | 2020 | Zoological Systematics2020，45，4： | 0 |
| 3 | Comparative Metabolomics Analysis between Red- and White-Flowered Common Buckwheat Cultivars显示文摘Common buckwheat(Fagopyrum esculentum),a specialty crop in southwest China,is not only used as a supplement to primary grain crops but also to produce beverages,such as tea and wine.To fully exploit the products made from common buckwheat flower,ultra-performance liquid chromatography–electrospray ionization–tandem mass spectrometry(UPLC–ESI–MS/MS)was conducted to analyze the metabolites in red-(‘Guihong 2’)and white-flowered(‘Fengtian 1’)buckwheat cultivars.A total of 784 metabolites were identified of which flavonoids were the largest group with 191 components,followed by organic acids and derivatives(126),and amino acids and derivatives(95).Besides,dozens of phenylpropanoids,nucleotides and derivates,lipids,alkaloids as well as several kinds of indole derivatives and sterides were detected.Among these rich varieties of metabolites,24 metabolites were only detected in the red flower that mainly included 8 anthocyanins and 6 flavones,while 22 metabolites were only detected in the white flower,which mainly contained 5 lipids,5 flavonoids,and 5 organic acids and derivatives.Our results enrich the metabolites’information of buckwheat and may be helpful for the exploitation of products from common buckwheat flowers. | Jiao Deng Fen Dong Chaoxin Wu Jiali Zhao Hongyou Li Juan Huang Taoxiong Shi Ziye Meng Fang Cai Qingfu Chen Pingfang Yang | 2021 | Phyton-International Journal of Experimental Botany2021，90，3： | 0 |
| 4 | Continuous-wave operation of 1550 nm low-threshold triple-lattice photonic-crystal surface-emitting lasers显示文摘Benefitting from narrow beam divergence,photonic crystal surface-emitting lasers are expected to play an essential role in the ever-growing fields of optical communication and light detection and ranging.Lasers operating with 1.55μm wavelengths have attracted particular attention due to their minimum fiber loss and high eye-safe threshold.However,high interband absorption significantly decreases their performance at this 1.55μm wavelength.Therefore,stronger optical feedback is needed to reduce their threshold and thus improve the output power.Toward this goal,photonic-crystal resonators with deep holes and high dielectric contrast are often used.Nevertheless,the relevant techniques for high-contrast photonic crystals inevitably complicate fabrication and reduce the final yield.In this paper,we demonstrate the first continuous-wave operation of 1.55μm photonic-crystal surface-emitting lasers by using a‘triple-lattice photonic-crystal resonator’,which superimposes three lattice point groups to increase the strength of in-plane optical feedback.Using this geometry,the in-plane 180°coupling can be enhanced threefold compared to the normal single-lattice structure.Detailed theoretical and experimental investigations demonstrate the much lower threshold current density of this structure compared to‘single-lattice’and‘double-lattice’photonic-crystal resonators,verifying our design principles.Our findings provide a new strategy for photonic crystal laser miniaturization,which is crucial for realizing their use in future high-speed applications. | Ziye Wang Xia Liu Pinyao Wang Huanyu Lu Bo Meng Wei Zhang Lijie Wang Yanjing Wang Cunzhu Tong | 2024 | Light(Science & Applications)2024，13，3： | 0 |
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