| 81. |
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| 82. |
- Wang, Jian, et al.
(författare)
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ACO-Based Thermal-Aware Thread-to-Core Mapping for Dark-Silicon-Constrained CMPs
- 2017
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Ingår i: IEEE Transactions on Electron Devices. - : IEEE Press. - 0018-9383 .- 1557-9646. ; 64:3, s. 930-937
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Tidskriftsartikel (refereegranskat)abstract
- The limitation on thermal budget in chip multiprocessor (CMP) results in a fraction of inactive silicon regions called dark silicon, which significantly impacts the system performance. In this paper, we propose a thread-to-core mapping method for dark-silicon-constrainedCMPs to address their thermal issue. We first propose a thermal predictionmodel to forecast CMP temperature after the CMP executes a forthcoming application. Then, we develop an ant colony optimization-based algorithm to conduct the thread-to- core mapping process, such that the CMP peak temperature is minimized and, consequently, the probability of triggering CMP dynamic thermal management is decreased. Finally, we evaluate our method and compare it with the baseline (a standard Linux scheduler) and other existing methods (NoC-Sprinting, DaSiM mapping, and TP mapping). The simulation results show that our method gains good thermal profile and computational performance, and performs well with chip scaling. Specifically, it eliminates all thermal emergency time, outperforming all other methods, and gains million instructions per second improvement up to 12.9% against the baseline.
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| 83. |
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| 84. |
- Wang, Jing, et al.
(författare)
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Fabrication of novel g-C3N4/nanocage ZnS composites with enhanced photocatalytic activities under visible light irradiation
- 2014
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Ingår i: CrystEngComm. - : Royal Society of Chemistry (RSC). - 1466-8033. ; 16:21, s. 4485-4492
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Tidskriftsartikel (refereegranskat)abstract
- In order to develop efficient visible light-driven photocatalysts for environmental applications, novel g-C3N4/nanocage ZnS composites have been successfully fabricated via an anion exchange route using ZIF-8 as a self-sacrificing template. The as-prepared g-C3N4/ZnS composites were characterized by powder X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-vis diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy and photoluminescence. In addition, the photocatalytic oxidation of organic contaminants in aqueous solution was investigated with the g-C3N4/ZnS composite system under visible light irradiation by using rhodamine B as a model compound. The results indicate that the g-C3N4/ZnS composite photocatalysts show higher photocatalytic activity than the single component (pure g-C3N4 or ZnS). More specifically, the optimum photocatalytic activity of the g-C3N4/ZnS composite was achieved with a weight ratio of 6 : 1, which is as high as 37.8 and 2.8 times those of individual ZnS and g-C3N4 under visible light irradiation. The enhanced photocatalytic activity of g-C3N4/ZnS is mainly attributed to an efficient electron-hole separation at the interface of the two semiconductors, as determined by photoluminescence spectroscopy. Moreover, it is observed that. O-2 is the main active species in the photocatalytic oxidation of RhB solution using a g-C3N4/nanocage ZnS composite.
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| 85. |
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| 86. |
- Wang, Jing, et al.
(författare)
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Visible light-driven g-C3N4/m-Ag2Mo2O7 composite photocatalysts : synthesis, enhanced activity and photocatalytic mechanism
- 2014
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Ingår i: RSC Advances. - : Royal Society of Chemistry (RSC). - 2046-2069. ; 4:92, s. 51008-51015
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Tidskriftsartikel (refereegranskat)abstract
- The g-C3N4/m-Ag2Mo2O7 composite photocatalysts with well-aligned band structures are successfully fabricated by a simple two-step method with different mass contents of m-Ag2Mo2O7. The as-prepared samples are evaluated as photocatalysts toward rhodamine B (RhB) degradation in aqueous solution under visible light irradiation (lambda > 420 nm). The results demonstrate that the photocatalytic activities of the composites are strongly influenced by the weight ratio of g-C3N4 to m-Ag2Mo2O7. When it is 6 : 1, the composite exhibits the highest photocatalytic efficiency. More specifically, this value is as high as 3.4 and 6.1 times that of pure g-C3N4 and P25 respectively. In order to investigate the mechanism causing the enhanced photocatalytic degradation, the band structures are determined by UV-vis diffuse reflection spectroscopy and the Mott-Schottky technique. Moreover, the reactive radicals involved in the photocatalytic process are examined in detail via active species trapping (AST) experiments. The improved photocatalytic activities can be attributed to the efficient separation of the photo-induced charge carriers and the strong redox capacities benefit from the synergetic effect between g-C3N4 and m-Ag2Mo2O7.
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| 87. |
- Wang, Lichao, et al.
(författare)
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Mesoporous WO3 modified by Mo for enhancing reduction of CO2 to solar fuels under visible light and thermal conditions
- 2016
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Ingår i: Integrated Ferroelectrics. - : Taylor & Francis. - 1058-4587 .- 1607-8489. ; 172:1, s. 97-108
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Tidskriftsartikel (refereegranskat)abstract
- Mesoporous WO3 (m-WO3) was synthesized by a hydrothermal method using mesoporous silica KIT-6 as a hard template and silicotungstic acid as a precursor. The m-WO3 modified by molybdenum (Mo) nanoparticles could be used as a stable catalyst for photo-thermal inducing CO2 reducting reactions for solar fuels. Under visible light irradiation (lambda > 420 nm) and 250-, the catalytic activity of m-Mo/WO3 for the CH4 and CH3 OHevolution was found to be higher than that of m-WO3 and commercial WO3. The amount of evolved CH3OH from m-Mo/WO3 has reached 13.80 mu molg(-1) in 1 2 h, which is ca. 10 times as high as that of c-WO3 (1.36 mu molg(-1)) and 6.5 times as high as that of m-WO3 (2.12 mu molg(-1)), making it attractive for practical applications.
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| 88. |
- Wang, Longxin, et al.
(författare)
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Telomere-to-telomere and haplotype-resolved genome assembly of the Chinese cork oak (Quercus variabilis)
- 2023
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Ingår i: Frontiers in Plant Science. - : Frontiers Media S.A.. - 1664-462X. ; 14
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Tidskriftsartikel (refereegranskat)abstract
- The Quercus variabilis, a deciduous broadleaved tree species, holds significant ecological and economical value. While a chromosome-level genome for this species has been made available, it remains riddled with unanchored sequences and gaps. In this study, we present a nearly complete comprehensive telomere-to-telomere (T2T) and haplotype-resolved reference genome for Q. variabilis. This was achieved through the integration of ONT ultra-long reads, PacBio HiFi long reads, and Hi-C data. The resultant two haplotype genomes measure 789 Mb and 768 Mb in length, with a contig N50 of 65 Mb and 56 Mb, and were anchored to 12 allelic chromosomes. Within this T2T haplotype-resolved assembly, we predicted 36,830 and 36,370 protein-coding genes, with 95.9% and 96.0% functional annotation for each haplotype genome. The availability of the T2T and haplotype-resolved reference genome lays a solid foundation, not only for illustrating genome structure and functional genomics studies but also to inform and facilitate genetic breeding and improvement of cultivated Quercus species.
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| 89. |
- Wang, Shan-Shan, et al.
(författare)
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Modeling endface output patterns of optical micro/nanofibers
- 2008
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Ingår i: Optics Express. - 1094-4087. ; 16:12, s. 8887-8895
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Tidskriftsartikel (refereegranskat)abstract
- Endface output patterns of micro/nanofibers (MNFs) are simulated using a Three-Dimension Finite-Difference Time-Domain (3D-FDTD) method. The intensity distribution and beam widths of near-or far-field output patterns of freestanding silica and tellurite MNFs with flat, angled, spherical and tapered endfaces in air and/or water are obtained. It shows that, for a subwavelength-diameter MNF, highly confined output beam can be obtained in the near field, and the beam width can be tuned by the ratio of fiber diameter and light wavelength with a minimum width smaller than the wavelength. Meanwhile, MNFs with shaped endfaces behave differently from standard fibers in reflection, redirection and focus of light beam at the endfaces. These results may offer valuable references for practical evaluation and application of terminated MNFs with wavelength-or subwavelength-scale endfaces.
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| 90. |
- Wang, Zhe, et al.
(författare)
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A novel optimization framework for designing multi-stream compact heat exchangers and associated network
- 2017
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Ingår i: Applied Thermal Engineering. - : Elsevier BV. - 1359-4311. ; 116, s. 110-125
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Tidskriftsartikel (refereegranskat)abstract
- Despite the performance gains of heat exchangers by thermal-hydraulic optimization, many design approaches suffer from a long process of trial-and-error, limited practical problem formulation and poor robustness. This paper addresses those challenges and develops an optimization framework for designing multi-stream compact heat exchangers. The optimization framework consists of a multi-stream matching organization design with Pinch analysis principles on the heat exchanger network, fin selection and relevant layer pattern using multi-objective algorithm for the thermal-hydraulic modeling, and a field synergy optimization analysis for the temperature field of exchanger. There are compatible with each other by the mutual restriction of design parameters and the process requirements. Finally, by means of a segmented differential calculation, the designed temperature field of all the streams and layers can be obtained. Design capabilities of this optimization framework are investigated on two multi-stream heat exchangers for cryogenic air separation processes. The optimization results are compared with traditional design methods, proving that this framework not only satisfies the specific energy requirement, but also to some extent improves the heat transfer efficiency and reduces the fluid resistance. The developed optimization framework provides a flexible and robust method for numerical simulation and optimization design of multi-stream heat exchangers.
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