15,466 research outputs found
Control and Filtering for Discrete Linear Repetitive Processes with H infty and ell 2--ell infty Performance
No full textRepetitive processes are characterized by a series of sweeps, termed passes, through a set of dynamics defined over a finite duration known as the pass length. On each pass an output, termed the pass profile, is produced which acts as a forcing function on, and hence contributes to, the dynamics of the next pass profile. This can lead to oscillations which increase in amplitude in the pass to pass direction and cannot be controlled by standard control laws. Here we give new results on the design of physically based control laws for the sub-class of so-called discrete linear repetitive processes which arise in applications areas such as iterative learning control. The main contribution is to show how control law design can be undertaken within the framework of a general robust filtering problem with guaranteed levels of performance. In particular, we develop algorithms for the design of an H? and dynamic output feedback controller and filter which guarantees that the resulting controlled (filtering error) process, respectively, is stable along the pass and has prescribed disturbance attenuation performance as measured by and – norms
sj-docx-2-ict-10.1177_15347354241233258 – Supplemental material for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis
No full textSupplemental material, sj-docx-2-ict-10.1177_15347354241233258 for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis by Yi Zhao, Linan Zhao, Tao Wang, Zhenghao Liu, Suyuan Tang, Hongxia Huang, Li Wu and Youzhi Sun in Integrative Cancer Therapies</p
sj-docx-1-ict-10.1177_15347354241233258 – Supplemental material for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis
No full textSupplemental material, sj-docx-1-ict-10.1177_15347354241233258 for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis by Yi Zhao, Linan Zhao, Tao Wang, Zhenghao Liu, Suyuan Tang, Hongxia Huang, Li Wu and Youzhi Sun in Integrative Cancer Therapies</p
sj-xls-3-ict-10.1177_15347354241233258 – Supplemental material for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis
No full textSupplemental material, sj-xls-3-ict-10.1177_15347354241233258 for The Herbal Combination Shu Gan Jie Yu Regulates the SNCG/ER-a/AKT-ERK Pathway in DMBA-Induced Breast Cancer and Breast Cancer Cell Lines Based on RNA-Seq and IPA Analysis by Yi Zhao, Linan Zhao, Tao Wang, Zhenghao Liu, Suyuan Tang, Hongxia Huang, Li Wu and Youzhi Sun in Integrative Cancer Therapies</p
Acoustic radiation due to scattering of T-S wave by the mean-flow distortion induced by steady local suction
No full textSubstantial sound waves can be generated by boundary-layer instability modes when the latter are scattered by a rapid mean-flow distortion. This is a rather generic mechanism and operates when an oncoming T-S wave is scattered by a steady local suction slot. This paper focuses on this problem by extending a recently developed Local Scattering Theory (Wu & Dong, J. Fluid Mech. submitted), where a so-called transmission coefficient, defined as the ratio of the T-S wave amplitude downstream of the scatter to that upstream, is introduced to characterize the effect of a local scatter on boundary-layer instability and transition. As in the earlier work, the mathematical formulation is based on triple-deck formulism, but in order to accommodate the acoustic far field, which was not considered in the paper mentioned, the unsteady terms in the upper deck, which play a leading-order role in radiation, are retained, and the influence of the radiated sound on the near-wall perturbation is included. The upper deck equation for the pressure is the Helmholtz equation rather than the Laplace equation. This leads to a modified pressure-displacement relation, which is coupled with the linearized boundary-layer equations in the lower deck. Discretization of the whole system formulates a generalized eigenvalue problem, which is solved numerically. It is found that suction suppresses oncoming T-S waves, and this effect increases with the suction velocity and the slot width. The directivity is ndependent of the flow parameters only when the Mach number is low. The intensity of the radiated sound in general increases with the frequency, the suction velocity and the width of the suction slot. Interestingly, for O(1) suction velocities, the radiated sound is very weak, indicating that the gain of stabilizing effect does not cause aeroacoustic penalty
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Tim Wu & “The Curse of Bigness”
No full textHost Nicholas Lemann sits down with Tim Wu, author of The Curse of Bigness, to discuss the politics of Louis Brandeis and Theodore Roosevelt as antitrust has reemerged this year as a major issue in the run-up to the 2020 U.S. Presidential Election.
Zygoneura (Pharetratula) longa Zhang & Wu, sp. nov.
No full textZygoneura (Pharetratula) longa Zhang & Wu, sp. nov. Specimens examined. Holotype, male. China, Zhejiang province, Lishui, Taishun, Mt. Wuyanling nature reserve, 28 °01΄N, 120 ° 38 ΄E, 04.VIII. 2005, Yi-Ping Wang [SM00948]. Paratype. 1 Male, China, Zhejiang, Linan, Mt. Xijingshan nature reserve, Laodian, 30 ° 23 ΄N, 119 ° 43 ΄E, 21.XI. 2008, Su-Jiong Zhang [SM00129]; 1 male, China, Fujian province, Mt. Wuyishan nature reserve, Xingcun, 27 ° 46 ΄N, 118 °02΄E, 17.IV. 2009, Su- Jiong Zhang [SM00507]. Description (Male). Body length 2.31 mm. Color: The head is bleached, pale brown; antenna, thorax, coxae, abdomen and hypopygium yellowish-brown; legs yellow; wing fumose. Head (Fig. 2 A, B): Eye bridge broad, with four rows of facets. Prefrons bearing eight setae. Palpus three-segmented, basal segment with two setae, 2 nd segment with four setae, 3 rd segment with four setae. Flagellomeres mostly bearing short setae, except one row of remarkably long setae around the neck. The 4 th flagellomere 0.11 mm in length, length/ width: 2.7, flagellomere neck 0.06 mm, nearly 1 / 2 the length of the flagellomere. Thorax: Posterior pronotum with two setae. Mediotergite with three setae. Scutellum with no setae. Apex of fore tibia densely covered by disordered long setae (Fig. 2 C): Length of spur/width of tibia: fore leg 1.33, mid leg 0.67, hind leg 1.03; length of metatarsus/length of tibia: fore leg 0.58, mid leg 0.55, hind leg 0.39; length of hind tibia/length of thorax: 1.13. Tarsal claws two-toothed. Wings (Fig. 2 D): Wing length 1.38 mm, width/length: 0.41. r-m with two setae on dorsal side. M 1, M 2, CuA 1 with no setae. stM not easily visible. c/w: 0.79. R 1 /R: 0.52. Terminalia: Ventral mesial margin of gonocoxa with two evident groups of setae (Fig. 2 E). Gonostylus slender, with one subapical megaseta and another longer sub-basal megaseta in the inner side. Tegmen higher than broad (Fig. 2 F). Female. Unknown. Remarks. The species belongs to the subgenus Pharetratula. It is similar to Z. divergens (Mamaev, 1976) and Z. subdivergens (Mohrig & Mamaev, 1990), in the subapical and sub-basal megasetae (Mamaev 1976; Mohrig et al. 1990), but the new species can be distinguished by the slenderer gonostylus and its two different megasetae, as well as the different tegmen. Moreover, the posterior pronotum has 1–2 setae in Z. longa, while it is bare in Z. subdivergens. Etymology. The species is named after its slender gonostylus.Published as part of Zhang, Su-Jiong, Wu, Hong & Huang, Junhao, 2010, The genus Zygoneura Meigen in China, with descriptions of three new species (Diptera, Sciaridae), pp. 40-48 in Zootaxa 2368 on pages 43-45, DOI: 10.5281/zenodo.19368
Measurement of dwell times of spin polarized rubidium atoms on octadecyltrichlorosilane- and paraffin-coated surfaces
No full textWe report the measurement of dwell times of spin polarized Rb atoms on octadecyltrichlorosilane OTS- and paraffin-coated surfaces. We find that at a cell temperature of 72 °C the dwell times for OTS- and paraffin-coated surfaces are 0.9+-0.1 microsecond and 1.8 +-0.2 microsecond , respectively. Since the relaxation probability on paraffin is almost one order of magnitude smaller than that on OTS, the longer dwell time for paraffin indicates that the average strength of the interactions experienced by Rb atoms while they are inside paraffin is much weaker than while they are inside OTS.Peer reviewe
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