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| 1 | Chattering analysis for discrete sliding mode control ofdistributed control systems显示文摘The chattering characteristic of sliding mode control is analyzed when it is applied in distributed control systems(DCSs).For a DCS with random time delay and packet dropout, a discrete switching system model with time varying sampling period is constructed based on the time delay system method. The reaching law based sliding mode controller is applied in the proposed system. The exponential stability condition in the form of linear matrix inequality is figured out based on the multi-Lyaponov function method. Then, the chattering characteristic is analyzed for the switching system, and a chattering region related with time varying sampling period and external disturbance is proposed. Finally, numerical examples are given to illustrate the validity of the analysis result. | litong ren shousheng xie yu zhang jingbo peng ledi zhang | 2016 | Journal of Systems Engineering and Electronics2016，27，5： | 4 |
| 2 | Neo- and Paleopolyploidy contribute to the species diversity of Asplenium the most species-rich genus of ferns显示文摘Polyploidy 广泛地在植物的进化被看作一个主要过程,但是多倍体种类差异的累积仍然是争论的。一些最近的研究与他们的双祖先相比在 neopolyploids 建议了增加的扑灭风险。多倍体蕨纲植物的高比例被期望主要被 neopolyploids 形成,而 paleopolyploid 种类被预言在整个染色体复制成立的 clades 被聚类。这里,我们由在导出的蕨纲植物家庭 Aspleniaceae 探索 polyploidy 的进化测试这预言。家庭有全球分布并且在所有蕨纲植物之中显示出多倍体 taxa 的最高的频率。测试假设,我们用代表 292 种类的 883 个标本的叶绿体 DNA 序列获得了全面发展史。所有出版染色体计数被印射到这个种系发生的框架上以便探索多倍体的进化。我们 Aspleniaceae 的历史上为几整个染色体复制恢复了证据。超过 tetraploid 水平的多倍体的种系发生的关系建议那 tetraploid Asplenium 种可能在这个家庭的某 clades 作为主要进化播放器代替了他们的双祖先。 | Harald Schneider Hong-Mei Liu Yan-Fen Chang Daniel Ohlsen Leon R. Perrie Lara Shepherd Michael Kessler Dirk N. Karger Sabine Hennequin Jeannine Marquardt Stephen Russell Stephen Ansell Ngan Thi Lu Peris Kamau Josmaily Loriga Ledis Regalado Jochen Heinrichs Atsushi Ebihara Alan R. Smith Mary Gibby | 2017 | Journal of Systematics and Evolution2017，55，4： | 2 |
| 3 | Amide group coordination to the Pb^2+ ion 显示文摘 | Gianantonio B Marco B Ledi M | 1996 | Inorg Chem1996，35，14： | 1 |
| 4 | Cadmium-N-(p-tolysttlfonyl) glutaminate acta cryst 显示文摘 | Lusvardi Gigliola Menabue Ledi Saladini M | 1995 | Sect C: Cryst Struct Commtm1995，51，11： | 1 |
| 5 | Amide group coordination to the Pb^2+ ion 显示文摘 | Gianantonio Battistuzzi Marco Borsari Ledi Menahue | 1996 | Inorg Chem1996，35，14： | 1 |
| 6 | Copper(Ⅱ) Complexes of Peptide-Group-Containg Amino Acids 显示文摘 | Giuseppe M Ledi M Gian C P | 1977 | J Inorg Nucl Chem1977，39，： | 1 |
| 7 | Field application of a set of cellular biomarkers in the digestive gland of the freshwater snail Radix peregra (Gastropoda, Pulmonata) 显示文摘 | GUERLET E LEDY K GIAMBeRINI L | 2006 | Aquatic Toxicology2006，，77： | 1 |
| 8 | Instances of sex inversion in the domesticated swordtail,Xiphophorus helleri Heckel(Pisces,Osteiehthyes)显示文摘 | Ledi E | 1979 | Experientia1979，35，11： | 1 |
| 9 | Reactivity of biological and synthetic hydroxyapatite towards Zn(II) ion, solid-liquid investigations显示文摘 | Gigliola Lusvardi Ledi Menabue Monica Saladini | 2002 | Journal of Materials Science: Materials in Medicine2002，，1： | 1 |
| 10 | Cadmium-N-(p-tolysulfonyl)glutaminate显示文摘 | Lusvardi Gigliola Menabue Ledi Saladini M | 1995 | Acta Cryst Sect C:Cryst Struct Commun1995，51，11： | 1 |
| 11 | Heinrichsia cheilanthoides gen. et sp. nov., a fossil fern in the family Pteridaceae (Polypodiales) from the Cretaceous amber forests of Myanmar显示文摘Divergence time estimates suggest that most clades constituting the fern family Pteridaceae (Polypodiales) were in existence by the Early Cretaceous. However, fossil evidence to corroborate this remains exceedingly rare. Burmese amber is an important source of new information on the radiation of derived fern lineages during the Cretaceous Terrestrial Revolution. This study describes Heinrichsia cheilanthoides gen. et sp. nov., a fern with suggested affinities to Pteridaceae, based on fertile foliage portions preserved in Early Cretaceous (~100?Ma) amber from Myanmar. Heinrichsia cheilanthoides is characterized by a pinnate‐pinnatifid frond that bears apical, marginal sori protected by a pseudoindusium. Sporangia are of the polypod type and contain tetrahedral‐globose, trilete spores with a striate perine. This discovery provides a new calibration point to test and refine molecular clock‐based concepts of the evolutionary history of the Pteridaceae. Heinrichsia cheilanthoides further substantiates the suggestion that the Cretaceous forests of Myanmar were home to a rich fern flora. | Ledis Regalado Alexander R. Schmidt Patrick Muller Lisa Niedermeier Michael Krings Harald Schneider | 2019 | Journal of Systematics and Evolution2019，57，4： | 1 |
| 12 | Amide group coordination to the Pb2+ Ion显示文摘 | Gianantonio Battistuzzi Marco Borsari Ledi Menabue | 1996 | Inorg Chem1996，35，14： | 1 |
| 13 | Effect of Cu^2+ ion on the structural stability of synthetic hydroxyapatite显示文摘 | Sergio Bruckner Gigliola Lusvardi Ledi Menabue | 1993 | Journal of Materials Chemistry1993，3，7： | 1 |
| 14 | How diverse were ferns in the Baltic amber forest?显示文摘Diverse temperate forest types and a high atmospheric humidity have recently been suggested for the Eocene source area of Baltic amber. However, ferns are astonishingly rare as inclusions in this amber, which is in contrast to other seed‐free land plants, fungi, and lichens. Moreover, the identities of some of the few described putative fern taxa are dubious, and some fossils were even assigned to the Paleozoic seed fern genera Alethopteris, Pecopteris and to the form genus Sphenopteris containing Paleozoic and Mesozoic fern‐like leaf fossils. Here, we review previously described fern inclusions from Baltic amber and identify further fern‐like leaf inclusions as belonging to the extant angiosperm genus Comptonia (sweet ferns, Myricaceae). We conclude that only one taxon, Matonia striata (Matoniaceae), can with confidence be identified as a Polypodiopsida representative. Although “Pecopteris” humboldtiana is so far only known as sterile foliage, its leaf morphology strongly suggests that also this taxon belongs to the Polypodiopsida rather than to any other tracheophyte lineage. We propose accommodating “Pecopteris” humboldtiana in the new genus Berendtiopteris.“Alethopteris” serrata and “Sphenopteris” phyllocladoides are not to be regarded as evidence of ferns from Baltic amber. Reinvestigation of the holotypes of these two taxa did not reveal to which tracheophyte lineages these fossils belong. We suggest that the scarcity of fern remains from Baltic amber may reflect both a relatively low fern diversity in the source area of the fossil resin, and an absence or rarity of epiphytic and climbing ferns as observed in modern temperate forest ecosystems. | Eva-Maria Sadowski Leyla J. Seyfullah Ledis Regalado Laura E. Skadell Alexander Gehler Carsten Grohn Christel Hoffeins Hans Werner Hoffeins Christian Neumann Harald Schneider Alexander R. Schmidt | 2019 | Journal of Systematics and Evolution2019，57，4： | 0 |
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