54 research outputs found
Correction: Zhang et al. The Impact of Green Financial Policy on the Regional Economic Development Level and AQI—Evidence from Zhejiang Province, China. Sustainability 2023, 15, 4068
No full textRegarding the author correction request, it has been clarified that the original paper was composed by Daping Zhang, Pinzhen Cheng, Minxing Wang, Zhenming Chen and Lufei Huang [...
Cyclic Sieving and Cluster Duality of Grassmannian
No full textWe introduce a decorated configuration space Confˣₙ() with a potential function . We prove the cluster duality conjecture of Fock-Goncharov for Grassmannians, that is, the tropicalization of (Confˣₙ(), ) canonically parametrizes a linear basis of the homogeneous coordinate ring of the Grassmannian Grₐ(n) with respect to the Plücker embedding. We prove that (Confˣₙ(), ) is equivalent to the mirror Landau-Ginzburg model of the Grassmannian considered by Eguchi-Hori-Xiong, Marsh-Rietsch, and Rietsch-Williams. As an application, we show a cyclic sieving phenomenon involving plane partitions under a sequence of piecewise-linear toggles.We are grateful to Alexander Goncharov for the inspiration on the construction of the cluster dual space, and to Jiuzu Hong for many helpful discussions on the representation theoretical aspects of the cyclic sieving problem. We would also like to thank Michael Gekhtman, Li Li, Tim Magee, Gregg Musiker, Brendon Rhoades, Bruce Sagan, Lauren Williams, Eric Zaslow, and Peng Zhou for useful conversations in the process of drafting this paper. Finally, we thank the referees for their very careful reading of this paper and for many useful suggestions
Intersections of Dual -Webs
No full textWe introduce a topological intersection number for an ordered pair of
-webs on a decorated surface. Using this intersection
pairing between reduced -webs and a
collection of -webs associated with the
Fock--Goncharov cluster coordinates, we provide a natural combinatorial
interpretation of the bijection from the set of reduced
-webs to the tropical set
, as established by
Douglas and Sun in \cite{DS20a, DS20b}. We provide a new proof of the flip
equivariance of the above bijection, which is crucial for proving the
Fock--Goncharov duality conjecture of higher Teichm\"uller spaces for
.Comment: 31 pages, 31 figure
Positive Braid Links with Infinitely Many Fillings
No full textWe prove that any positive braid Legendrian link not isotopic to a standard
finite type link admits infinitely many exact Lagrangian fillings.Comment: 19 pages. arXiv admin note: substantial text overlap with
arXiv:2008.1079
Fatigue crack growth in ceramics containing a viscous grain boundary phase at elevated temperatures
No full textElevated-temperature crack growth behavior in a commercial Al\sb2O\sb3 and a hot-pressed 30 vol.% TiB\sb2-SiC composite was examined under tensile static loading (static fatigue) and tension-tension cyclic loading (cyclic fatigue). The study was carried out at temperatures of 700-900\sp\circC, where the vitreous grain boundary phase flowed viscously. Experimental results have shown the existence of cyclic fatigue in these materials, but the cyclic effect cannot be seen as the consequence of a static fatigue mechanism, although under both cyclic and static loading conditions crack propagation assumed an intergranular fracture mode. The testing temperature, load ratio, and cyclic frequency were found to exert significant effects on cyclic fatigue-crack growth behavior. A damage zone was observed ahead of the crack tip in which grain boundary cavitation (or microcracking) occurred during fatigue-crack growth. An analytical model based upon the damage accumulation in the grain boundary phase was developed that successfully predicted the frequency and load ratio dependencies of crack growth. Values of activation energy for cyclic and static fatigue crack growth were approximately the same. Fracture mechanisms in both cases were also found to be similar. However, crack growth under static loads was faster than that under cyclic loads at the same maximum stress intensity. Such a difference in the growth rate suggested that the damage accumulation in the grain boundary phase differed during cyclic and static fatigue processes. In the TiB\sb2-SiC composite, cyclic fatigue-crack growth at elevated temperatures was affected by oxide-induced crack closure and showed an anomalous temperature dependence. After subtracting crack closure, cyclic fatigue-crack growth exhibited a temperature dependence that was governed by the viscous flow of the grain boundary phase.Made available in DSpace on 2011-05-07T14:23:12Z (GMT). No. of bitstreams: 2
license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5)
9624543.pdf: 5900063 bytes, checksum: 8fc3e435a56e2585f4cbe8137cccaea7 (MD5)
Previous issue date: 1995Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding ([email protected]) on 2011-05-07T15:06:09Z
Item is restricted indefinitely.Restriction data tranferred 2014-07-01T11:31:44-05:00
Original Data
Group with Access UIUC Users [automated]
Release Date: none
Reason: ETDs are only available to UIUC Users without author permissionETDs are only available to UIUC Users without author permissionU of I Onl
Phase distortion corrections of phase-only LCOS devices for digital holographic applications
No full text© OSA 2019 © 2019 The Author(s) Significant phase distortion corrections of nearly perfect phase linearity and minimum phase flicker with doubled meaningful phase levels was achieved by optimising the digital driving patterns of phase-only LCoS devices for digital holographic applications
Simultaneous biodegradation of Ni-citrate complexes and removal of nickel from solutions by Pseudomonas alcaliphila
No full textThe objective of this study was to study the simultaneous biodegradation of Ni-citrate complexes and removal of Ni from solutions by Pseudomonas alcaliphila. Adding excess citrate to 1:1 Ni-citrate complexes promoted the degradation of the complexes and removal of Ni. The alkaline pH generated by the metabolism of excess citrate caused partial dissociation of citrate from the Ni-citrate complexes, allowing degradation, and the released Ni was removed through bioaccumulation and precipitation. Addition of Fe3+ enhanced the degradation of Ni-citrate complexes and removal of Ni from solutions. The displacement of Ni from recalcitrant Ni-citrate complexes by Fe3+ and subsequent biodegradation of the degradable Fe(III)-citrate complex resulted in complete metabolism of citrate. The almost complete removal of Ni (>98%) can be attributed to the combination of coprecipitation with Fe3+, bioaccumulation and precipitation. P. alcaliphila potentially could be applied in the treatment of effluent containing Ni-citrate complexes. (C) 2012 Elsevier Ltd. All rights reserved
Aerobic bioreduction of nickel(II) to elemental nickel with concomitant biomineralization
No full textAlthough microorganisms have the potential to reduce metals, products with elementary forms are unusual. In the present study, a strain of Pseudomonas sp. MBR was tested for its ability to reduce metal ions to their elementary forms coupled to biomineralization under aerobic conditions. The Pseudomonas sp. MBR strain was able to reduce metals such as Fe(III), Mn(II), Cu(II), Ni(II), Cd(II), Co(II), Al(III), Se(IV), and Te(IV) as electron acceptors to elementary forms using citrate, lactate, pyruvate, succinate, malate, glucose, or ethanol as electron donors. Growth and reduction during biomineralization occurred within the pH range of 6.0 to 11.0 and temperature range of 4 to 40 A degrees C, with an optimum growth temperature of 28 A degrees C. The resistance of Ni(II) varied from 0.5 to 5 mM. Ni(II) reduction was still observed when nitrate was present in addition to oxygen as a potential electron acceptor. The Ni(II) reduction efficiency was related with the molar ratio of the electron donor to Ni(II). Unlike other dissimilatory metal-reducing bacteria, which oxidizes organic matter with Fe(III) or Mn(IV) as the sole electron acceptor coupled to energy production under facultative anaerobic conditions, this strain used oxygen as an electron acceptor combined with metal reduction. The aerobic metal reduction may relate to a co-metabolic reduction. Transmission electron microscopy images demonstrated that the cells had the ability to accumulate heavy metals, and that the detoxicity mechanism was intracellular metal reduction. These results suggested that the use of Pseudomonas sp. MBR could be promising for toxic heavy metal bioremediation and biological metallurgy
Enhanced dark fermentative hydrogen production by zero-valent iron activated carbon micro-electrolysis
No full textThis paper investigated the enhancement effect of zero-valent iron activated carbon (ZVI-AC) micro-electrolysis system on fermentative hydrogen production from glucose by a mixed bacterial consortium. The results showed that addition of ZVI obtained 38.2% more hydrogen yield, and ZVI-AC micro-electrolysis could further enhance hydrogen yield (improving rate 50.2%). The ZVI-AC also got the highest hydrogen production potential and maximum hydrogen production rate (429 +/- 6.1 mL and 11.50 +/- 0.74 mL/h respectively). The concentration of ferrous ion, final oxidation-reduction potential and pH were measured to understand the mechanism of enhanced hydrogen production by ZVI-AC micro-electrolysis. We concluded that ZVI-AC micro-electrolysis provided a favorable environment which was proposed to be responsible for the improvement of fermentative hydrogen production. In addition, high-throughput sequencing proved that ZVI-AC micro-electrolysis could enhance diversity of microbial community and enrich Clostridium spp. for hydrogen production. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved
Calculating real-time computer-generated holograms for holographic 3D displays through deep learning
No full text© OSA 2019 © 2019 The Author(s) A deep learning method is proposed to calculate holograms in real-time. After training, it can generate holograms for all R/G/B channels within 10 msec. Simulation results confirm successfully reconstruct the target training and testing images
- …
