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  • 1
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    Spectral properties of photon pairs generated by spontaneous four-wave mixing in inhomogeneous photonic crystal fibers (2012)
    American Physical Society (APS)
    Details
    Publication Date: 2012-02-22
    Description: Author(s): Liang Cui, Xiaoying Li, and Ningbo Zhao The photonic crystal fiber (PCF) is one of the excellent media for generating photon pairs via spontaneous four-wave mixing. Here we study how the inhomogeneity of PCFs affect the spectral properties of photon pairs from both the theoretical and experimental aspects. The theoretical model shows that... [Phys. Rev. A 85, 023825] Published Tue Feb 21, 2012
    Keywords: Quantum optics, physics of lasers, nonlinear optics, classical optics
    Print ISSN: 1050-2947
    Electronic ISSN: 1094-1622
    Topics: Physics
    Published by American Physical Society (APS)
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  • 2
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    Upgrade of beamline 3W1B at Beijing Synchrotron Radiation Facility (2013)
    Institute of Physics (IOP)
    Details
    Publication Date: 2013-05-16
    Description: To improve the performance of Beamline 3W1B at the Beijing Synchrotron Radiation Facility for the soft X-ray magnetic linear dichroism research at transition metals L 2,3 edges, a new monochromator was designed and built to replace the original one. After the assemblage, alignment and adjustment of the monochromator system, the first commissioning results were obtained. The photon energy range is from 50 to 1000 eV with spectral resolutions of 1600 at 250 eV and 1000 at 870 eV. The photon flux is of the order of 10 8 –10 9 photons/s/200 mA/0.1%BW. In the electron's orbital plane the linear polarization degree of the light is higher than 99% at 704 eV. The beamline has satisfied the basic experimental requirements.
    Print ISSN: 1674-1137
    Topics: Physics
    Published by Institute of Physics (IOP)
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  • 3
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    Ba2Cd(B3O6)2: A Congruent-Melting Compound with Isolated B3O6 Units (2013)
    Wiley-Blackwell
    Details
    Publication Date: 2013-04-27
    Description: The single crystals of Ba 2 Cd(B 3 O 6 ) 2 were grown by the spontaneous crystallization method for the first time. They crystallize in the centrosymmetric trigonal space group R with a = 7.143(3) Å, c = 17.405(16) Å, and Z = 3. The structure is characterized by isolated B 3 O 6 units, and the Ba 2+ and Cd 2+ cations connect with B 3 O 6 rings to form three dimensional structure. The TG/DSC and XRD results reveal that Ba 2 Cd(B 3 O 6 ) 2 melts congruently. First-principles electronic structure calculation performed with the density functional theory (DFT) method shows that the calculated bandgaps are 4.66 eV, which is in good agreement with the UV/Vis/NIR experimental value 4.59 eV. The calculation shows that the Ba 2 Cd(B 3 O 6 ) 2 crystal has a large birefringence (Δ n = 0.0875–0.0569 from 270 nm to 2600 nm), which demonstrates that Ba 2 Cd(B 3 O 6 ) 2 is a potential birefringence crystal.
    Print ISSN: 0044-2313
    Electronic ISSN: 1521-3749
    Topics: Chemistry and Pharmacology
    Published by Wiley-Blackwell
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  • 4
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    Post-spawning growth acceleration in fish as a result of reduced live weight and thus, increased food conversion efficiency (2023)
    Springer
    Details
    Publication Date: 2024-02-07
    Description: The conventional view of spawning in iteroparous bony fish, i.e., the “reproductive drain hypothesis,” is based on the observation that somatic growth (in length) slows down noticeably at approximately the time fish attain maturity, and hence the assumption is made that investment in gonadal development slows down growth. However, when this is translated as growth in weight, the weight at first maturity (or puberty) is usually smaller than the weight at which growth rate is highest, i.e., weight growth accelerates after first maturity. We solve this conundrum, with some emphasis on female cod (Gadus morhua), by proposing the hypothesis that the substantial loss of body mass experienced by fish as a result of spawning is quickly compensated for by increased somatic growth after the spawning period, notably because of the increase in food conversion efficiency resulting from a sudden loss of body weight, which necessarily leads to a large increase in relative oxygen supply via the gills. This is consistent with the argument developed elsewhere that declining relative oxygen supply by the gills, whose surface area cannot keep up with increasing body weight, is the reason for growth rate declining with weight in adult fish.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    New developments in the analysis of catch time series as the basis for fish stock assessments: The CMSY++ method (2023)
    Pensoft
    Details
    Publication Date: 2024-03-01
    Description: Following an introduction to the nature of fisheries catches and their information content, a new development of CMSY, a data-limited stock assessment method for fishes and invertebrates, is presented. This new version, CMSY++, overcomes several of the deficiencies of CMSY, which itself improved upon the “Catch-MSY” method published by S. Martell and R. Froese in 2013. The catch-only application of CMSY++ uses a Bayesian implementation of a modified Schaefer model, which also allows the fitting of abundance indices should such information be available. In the absence of historical catch time series and abundance indices, CMSY++ depends strongly on the provision of appropriate and informative priors for plausible ranges of initial and final stock depletion. An Artificial Neural Network (ANN) now assists in selecting objective priors for relative stock size based on patterns in 400 catch time series used for training. Regarding the cross-validation of the ANN predictions, of the 400 real stocks used in the training of ANN, 94% of final relative biomass (B/k) Bayesian (BSM) estimates were within the approximate 95% confidence limits of the respective CMSY++ estimate. Also, the equilibrium catch-biomass relations of the modified Schaefer model are compared with those of alternative surplus-production and age-structured models, suggesting that the latter two can be strongly biased towards underestimating the biomass required to sustain catches at low abundance. Numerous independent applications demonstrate how CMSY++ can incorporate, in addition to the required catch time series, both abundance data and a wide variety of ancillary information. We stress, however, the caveats and pitfalls of naively using the built-in prior options, which should instead be evaluated case-by-case and ideally be replaced by independent prior knowledge.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Kπ (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-05-13
    Description: Author(s): Dan Zhou, Er-Liang Cui, Hua-Xing Chen, Li-Sheng Geng, and Li-Hua Zhu We evaluate energy levels of the K π system in the K * channel in finite volume using chiral unitary theory. We use these energy levels to obtain K π phase shifts and then obtain the K * mass and its decay width. We investigate their dependence on the pion mass and compare this with lattice QCD calculat... [Phys. Rev. D 91, 094505] Published Mon May 11, 2015
    Keywords: Lattice Methods
    Print ISSN: 0556-2821
    Electronic ISSN: 1089-4918
    Topics: Physics
    Published by American Physical Society (APS)
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  • 7
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    Biostable L-DNAzyme for Sensing of Metal Ions in Biological Systems (2016)
    American Chemical Society (ACS)
    Details
    Publication Date: 2016-01-16
    Description: Analytical Chemistry DOI: 10.1021/acs.analchem.5b04170
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 8
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    Entropy Beacon: A Hairpin-Free DNA Amplification Strategy for Efficient Detection of Nucleic Acids (2015)
    American Chemical Society (ACS)
    Details
    Publication Date: 2015-11-18
    Description: Analytical Chemistry DOI: 10.1021/acs.analchem.5b02654
    Print ISSN: 0003-2700
    Electronic ISSN: 1520-6882
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society (ACS)
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  • 9
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    Sustainability, Vol. 7, Pages 9846-9863: Planning an Agricultural Water Resources Management System: A Two-Stage Stochastic Fractional Programming Model (2015)
    MDPI Publishing
    Details
    Publication Date: 2015-07-24
    Description: Irrigation water management is crucial for agricultural production and livelihood security in many regions and countries throughout the world. In this study, a two-stage stochastic fractional programming (TSFP) method is developed for planning an agricultural water resources management system under uncertainty. TSFP can provide an effective linkage between conflicting economic benefits and the associated penalties; it can also balance conflicting objectives and maximize the system marginal benefit with per unit of input under uncertainty. The developed TSFP method is applied to a real case of agricultural water resources management of the Zhangweinan River Basin China, which is one of the main food and cotton producing regions in north China and faces serious water shortage. The results demonstrate that the TSFP model is advantageous in balancing conflicting objectives and reflecting complicated relationships among multiple system factors. Results also indicate that, under the optimized irrigation target, the optimized water allocation rate of Minyou Channel and Zhangnan Channel are 57.3% and 42.7%, respectively, which adapts the changes in the actual agricultural water resources management problem. Compared with the inexact two-stage water management (ITSP) method, TSFP could more effectively address the sustainable water management problem, provide more information regarding tradeoffs between multiple input factors and system benefits, and help the water managers maintain sustainable water resources development of the Zhangweinan River Basin.
    Electronic ISSN: 2071-1050
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Published by MDPI Publishing
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  • 10
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    Modeling of self-desiccation in a cemented backfill structure (2017)
    Wiley-Blackwell
    Details
    Publication Date: 2017-11-04
    Description: After placement of cemented tailings backfill (CTB), which is a mixture of tailings (man-made soil), water, and binder, into underground mined-out voids (stopes), the hydration reaction of the binder converts the capillary water into chemically bound water, which results in the reduction of the water content in the pores of the CTB, thereby causing a reduction in the pore-water pressure in the CTB (self-desiccation). Self-desiccation has a significant impact on the pore-water pressure and effective stress development in CTB and paramount and practical importance for the stability assessment and design of CTB structures and barricades. However, self-desiccation in CTB structures is complex because it is a function of the multiphysics or coupled (i.e., thermal, hydraulic, mechanical, and chemical) processes that occur in CTB. To understand the self-desiccation behavior of CTB, an integrated multiphysics model of self-desiccation is developed in this study, which fully considers the coupled thermal, hydraulic, mechanical, and chemical processes and the consolidation process in CTB. All model coefficients are determined in measurable parameters. Moreover, the predictive ability of the model is verified with extensive case studies. A series of engineering issues are examined with the validated model to investigate the self-desiccation process in CTB structures with respect to the changes in the mixture recipe, backfilling, and the surrounding rock and curing conditions. The obtained results provide in-depth insight into the self-desiccation behavior of CTB structures. The developed multiphysics model is therefore a potential tool for assessing and predicting self-desiccation in CTB structures.
    Print ISSN: 0363-9061
    Electronic ISSN: 1096-9853
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Published by Wiley-Blackwell
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