59,486 research outputs found
On the well-posedness of the Schrödinger–Korteweg–de Vries system
No full textAbstractWe prove that the Cauchy problem for the Schrödinger–Korteweg–de Vries system is locally well-posed for the initial data belonging to the Sobolev spaces L2(R)×H−3/4(R), and Hs(R)×H−3/4(R) (s>−1/16) for the resonant case. The new ingredient is that we use the F¯s-type space, introduced by the first author in Guo (2009) [10], to deal with the KdV part of the system and the coupling terms. In order to overcome the difficulty caused by the lack of scaling invariance, we prove uniform estimates for the multiplier. This result improves the previous one by Corcho and Linares (2007) [6]
Applicability of Phase-Function Normalization Techniques for Radiation Transfer Computation
No full textThe applicability of recently-developed four phase-function (PF) normalization techniques for modeling radiation transfer in strongly anisotropic scattering media is intensively examined using the discrete-ordinate method. The three simple techniques via normalization of only the forward- and/or backward-scattering directions were shown to reduce normalization complexity whilst retaining diffuse radiation computation accuracy for Henyey-Greenstein (HG) PFs. For Legendre PFs, however, such simple techniques are found to result in unphysical negative PF value at one or few correction direction in some cases. Additionally, negative PF values can occur for these simple techniques for ballistic radiation transfer for both HG and Legendre PF types. If negative-intensity correction is applied, however, radiative heat transfer calculation can still converge regardless of the appearance of negative PF values. The relatively complex Hunter and Guo 2012 technique, in which normalization is realized through a correction matrix covering all discrete directions, is shown to be applicable for diffuse and ballistic radiation for both PF types.Peer reviewed
Podocinum tibetensis Yan, Jin, Wu, Guo & Guo 2012
No full text36. Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012 Podocinum tibetensis Yan, Jin, Wu, Guo & Guo, 2012: 36. Type depository. Institute of Entomology, Guizhou University, Guiyang, China. Type locality and habitat. China, Bome County (29°53’ N, 95°40’ E; alt. 2726 m), Nyingchi, Tibet Autonomous Region, 25 August 2010, in litter under pine tree.Published as part of Barros, Avyla R. A., Castilho, Raphael C. & De Moraes, Gilberto J., 2020, Catalogue of the mite family Podocinidae Berlese (Acari: Mesostigmata), pp. 141-156 in Zootaxa 4802 (1) on page 153, DOI: 10.11646/zootaxa.4802.1.9, http://zenodo.org/record/390496
Guo, R., Wang, J.M., Zhang, W., He, D., Yu, J. & Yang, D.M. (2022) Pteris pseudoamoena (Pteridaceae), a new species from Guangxi, China and Vietnam. Phytotaxa 550 (3): 215-223.
No full textGuo, R., Wang, J.M., Zhang, W., He, D., Yu, J., Yang, D.M. (2022): Guo, R., Wang, J.M., Zhang, W., He, D., Yu, J. & Yang, D.M. (2022) Pteris pseudoamoena (Pteridaceae), a new species from Guangxi, China and Vietnam. Phytotaxa 550 (3): 215-223. Phytotaxa 552 (4): 277-277, DOI: https://doi.org/10.11646/phytotaxa.552.4.6, URL: http://dx.doi.org/10.11646/phytotaxa.552.4.
Flow and heat transfer inside a new diversion-type gas heating device
No full textThe present paper characterizes ethylene glycol flow and heat transfer inside a new diversion-type gas heating device. A 2-D natural convection heat transfer model was built and solved by the finite volume method with unstructured body-fitted grids. The numerical model was first validated through temperature comparison with experimental measurements in a conventional device structure. Then analyses and comparisons of the flow fields and temperature distributions with use of different guide plate structures were carried out. The numerical results show that using the guide plate structures can form better organized flow patterns that augment heat transfer. The heat required for heating up the gas passing through the heating device can be reduced by 3% via installing two guide plates.Peer reviewed
Global well-posedness of Korteweg–de Vries equation in H−3/4(R)
No full textAbstractWe prove that the Korteweg–de Vries initial-value problem is globally well-posed in H−3/4(R) and the modified Korteweg–de Vries initial-value problem is globally well-posed in H1/4(R). The new ingredient is that we use directly the contraction principle to prove local well-posedness for KdV equation in H−3/4 by constructing some special resolution spaces in order to avoid some ‘logarithmic divergence’ from the high–high interactions. Our local solution has almost the same properties as those for Hs (s>−3/4) solution which enable us to apply the I-method to extend it to a global solution
An Experimental Study of Ash Particles Adhesion Force in Flue Gas
No full textIn this study, experiments and analyses have been carried out to investigate the influences of denitrification and flue gas Waste Heat Recovery Systems (WHRS) on ash particles adhesion force. With use of a denitrification system, it is found that the ash particles adhesion force is strongly influenced by the mass ratio, R, of (NH4)HSO4 to ash. Three influencing zones are identified, i.e., little effect zone (R1:60). It is necessary to operate in the little effect zone in order to avoid ash deposition in the air preheater. With use of a WHRS, it is found that the ash adhesion force is strongly affected by the flue gas temperature in comparison with the Engineering Acid Dew Temperature (EADT). With decreasing temperature below the EADT, both the collected ash amount and ash adhesion force rise, and the detected particles size increases, indicating particle accumulation that improves ash collection efficiency.Peer reviewe
Reborn Translated: Xiaolu Guo as a World Author
No full textThis paper introduces the concept of “world author,” taking as its exemplar the Chinese British writer and filmmaker Xiaolu Guo. It investigates how Guo utilizes her bilingualism to construct and negotiate her creative agency, especially when dealing with the political and commercial forces imposed on diasporic authors. Through engaging with Rebecca Walkowitz’s idea of world literature as being “born translated,” I point out that the translational should not be limited to the thematic and representational arrangements internal to a given text. Instead, translation as movements between linguistic systems and media forms can generate multipleversions of a text, to the point that such translational multiplicity fundamentally challenges its supposed singularity. This argument is demonstrated with Guo’s self-translation of the stories of Fenfang and her filmic adaptation of the novel UFO in Her Eyes. Through these examples of what I call “translational rebirths,” I demonstrate the importance of paratextual details and intertextual connections between clusters of an author’s creative output for the interpretation and appreciation of l’oeuvre d’un auteur instead of une oeuvre d’art. This case study also shows the need for the academic debates on world literature to go beyond the singularity of texts and evaluative criteria of worldliness based on this assumption, so that the discipline can realize its full potential in accommodating multilingual transnational authors like Guo
Lebertia (Lebertia) abseta Guo, Jin & Asadi 2006
No full text3.4 <i>Lebertia</i> (<i>Lebertia</i>) <i>abseta</i> Guo, Jin <i>&</i> Asadi, 2006 <p> <i>Lebertia</i> (<i>Pseudolebertia</i>) <i>abseta</i> Guo, Jin & Asadi, 2006: 346; Guo & Xu, 2013: 190.</p> <p>Material examined. 3 females, 1 male, Pangquangou Nature Reserve, Jiaocheng County, Shanxi, China (37°30′N, 111°39′E; elev. 1 500 m), 15 August 2002, coll. Jianjun Guo; 6 females, 2 males, Mt. Luya National Nature Reserve, Shanxi, China (37°43′N, 111°51′E; elev. 1 350 m), 17 August 2002, coll. Jianjun Guo; 2 females, Mt. Cangyan, Jingxing County, Hebei, China (38°02′N, 114°08′E; elev. 900 m), 19 August 2002, coll. Jianjun Guo; 3 females, 2 males, Taibaishan National Nature Reserve, Taibai County, Shaanxi, China (37°07′N, 107°53′E; elev. 2 150 m), 9 July 2009, coll. Chengshuai Xu.</p> <p> Remarks. The species was erected by Guo, Jin <i>&</i> Asadi (2006) based on specimens from Iran, and redescribed by Guo <i>&</i> Xu (2013) based on specimens from China. In this paper, the authors agree with the system which proposed by Gerecke (2009) that the subgenus <i>Pseudolebertia</i> should be considered the synonym of the subgenus <i>Lebertia</i>. So that, the species <i>L.</i> (<i>Pseudolebertia</i>) <i>abseta</i> should be <i>L.</i> (<i>Lebertia</i>) <i>abseta</i>.</p> <p>Distribution. Palaearctic Region (Iran (Kerman); China (Shanxi, Shannxi, Hebei)).</p> <p> <b>Founding</b> This research was supported by the National Natural Science Foundation of China (31372161, 31201744), the Program of Science and Technology Innovation Talents Team, Guizhou Province (20144001), the Innovation Team Program for Systematic and Applied Acarology ([2014]33), and the Provincial Outstanding Graduate Program for Agricultural Entomology and Pest Control ([2013]010).</p> <p> <b>Acknowledgement</b> Special thanks to Prof. Shangwei Li (Institute of Entomology, Guizhou University, P. R. China) and Chengshuai Xu (Huantai No. 1 Middle School, Shandong Province, P. R. China) for providing references and advice to the authors.</p>Published as part of <i>Wang, Jialin, Jin, Daochao, Yi, Tianci & Guo, Jianjun, 2016, Water mites of subgenus Lebertia (Lebertia) Neuman from China (Hydrachnidia: Lebertiidae), pp. 54-63 in Zoological Systematics 41 (1)</i> on page 62, DOI: 10.11865/zs.201603, <a href="http://zenodo.org/record/5367272">http://zenodo.org/record/5367272</a>
Joint Spatial-Temporal Layer Bit Allocation with S-Domain Dependent R-D Modeling
No full textA joint spatial-temporal layer (S-T) bit allocation problem for H.264/SVC is studied with dependent layer rate and distortion (R-D) models. We examine dependent R-D models based on the self-domain} (S-domain) analysis, where the R-D characteristics of a dependent coding unit are expressed as the R-D characteristics of its reference and/or base layers. With the proposed R-D models, the complex inter-layer dependency can be simplified to be a linear sum of functions of a single parameter. The joint bit allocation problem is formulated as an optimization problem by the Lagrangian method, which could be numerically solved using the proposed R-D models. As a result, we develop a low-complexity bit allocation scheme for the combined spatial and temporal scalability of H.264/SVC. It is shown by experimental results that our proposed bit allocation algorithm has achieved the coding performance significantly improved from current reference software JSVM. ? 2011 IEEE.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000298610800068&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Computer Science, Theory & MethodsImaging Science & Photographic TechnologyEICPCI-S(ISTP)
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