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Temperature and Low-stakes Cognitive Performance
[article]
2021
medRxiv
pre-print
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As studies show that air pollution is associated with bad performance in cognitive tests (Ebenstein, Lavy, and Roth 2016; Zhang, Chen, and Zhang 2018) , we also add air quality as one of the control variables ...
Xin Zhang acknowledges financial support from the National Natural Science Foundation of China (72003014).
Conflict of interest The authors declare that they have no conflict of interest. ...
doi:10.1101/2021.10.15.21265034
fatcat:g73viguik5ah5lb6qcrdzjxpiq
Hanle detection for optical clocks
[article]
2014
arXiv
pre-print
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Considering the strong inhomogeneous spatial polarization and intensity distribution of spontaneous decay fluorescence due to the Hanle effect, we propose and demonstrate a universe Hanle detection configuration of electron-shelving method for optical clocks. Experimental results from Ca atomic beam optical frequency standard with 423 nm electron-shelving method show that a designed Hanle detection geometry with optimized magnetic field direction, detection laser beam propagation and
arXiv:1404.4431v1
fatcat:g45lpqnddjbm5isewxgyv5uihe
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... n direction, and detector position can improve the fluorescence collection rate by more than one order of magnitude comparing with that of inefficient geometry. With the fixed 423 nm fluorescence, the improved 657 nm optical frequency standard signal intensity is presented. And the potential application of the Hanle detection geometry designed for facilitating the fluorescence collection for optical lattice clock with a limited solid angle of the fluorescence collection has been discussed. This Hanle detection configuration is also effective for ion detection in ion optical clock and quantum information experiments. Besides, a cylinder fluorescence collection structure is designed to increase the solid angle of the fluorescence collection in Ca atomic beam optical frequency standard.
Adult adrenal ganglioneuroblastoma: A rare case report
2015
Canadian Urological Association Journal
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Xiaobo Ding, MD; * Yuchuan Hou, MD; † Xiaobo Ma, MD; § Huipeng, Zhang, MD; † Chunxi Wang, MD; † Yanbo Wang, MD † * Department of Radiology, First Hospital of Jilin University, Changchun, China; † Department ...
doi:10.5489/cuaj.2410
pmid:25737766
pmcid:PMC4336042
fatcat:o6cnrmofsfckrihv4e7k4cuos4
Reasons for the Extremely Small Population of putative hybrid Sonneratia × hainanensis W.C. Ko (Lythraceae)
2019
Forests
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Sonneratia × hainanensis, a species once endemic to Hainan Island in China, is now endangered. China's State Forestry Administration lists this species as a wild plant species with an extremely small population. Field fixed-point investigations, artificial pollination, and laboratory experiments, as well as other methods, were applied to study the reproductive system and seed germination of S. × hainanensis to elucidate the reasons for the endangerment of this species. The results are as
doi:10.3390/f10060526
fatcat:vhuf62qnznexbliotjz2mpbcvi
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... : (1) Outcrossing index, pollen-ovule ratio, and artificial pollination showed S. × hainanensis has a mixed mating system and mainly focuses on outcrossing with some self-compatibility. (2) Fruit and seed placement tests showed that the fruit predators on the ground were mainly Fiddler crab and squirrel, with the predation rates being 100%. The artificially spread seeds do not germinate under natural conditions. The mean seed destruction rate and remaining rate of were 82.5% and 17.5%. (3) Seeds need to germinate under ambient light conditions, with an optimal photoperiod of 12 h. Seed germination is extremely sensitive to low temperatures because of optimum temperatures from 30 °C to 40 °C. At an optimal temperature of 35 °C, the seeds germinate under salinities ranging from 0‰ to 7.5‰, with an optimal salinity of 2.5‰, which shows the sensitivity of seed germination to salinity, with low salinity promoting germination, whereas high salinity inhibits germination. These findings indicate that the limited regeneration of S. × hainanensis is caused by the following: (1) Pollen limitation and inbreeding recession caused by the extremely small population of S. × hainanensis. (2) Seeds near parent trees are susceptible not only to high fruit drop rate, but to high predation beneath the parent trees′ canopy as well. (3) Seed germination has weak adaptability to light, temperature, and salinity.
Acoustic rainbow trapping
2013
Scientific Reports
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Spatial modulation of sound velocity below the wavelength scale can introduce strong frequency-dependent acoustic responses in tailored composite materials, regardless the fact that most natural bulk materials have negligible acoustic dispersions. Here, for the first time, we experimentally demonstrate a metamaterial that traps broadband acoustic waves and spatially separates different frequency components, as the result of dispersion and wave velocity control by designed gradient subwavelength
doi:10.1038/srep01728
fatcat:4x4mblm5mvgghaua35k6nbficq
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... structures. The trapping positions can be predicted by the microscopic picture of balanced interplay between the acoustic resonance inside individual apertures and the mutual coupling among them. With the enhanced wave-structure interactions and the tailored frequency responses, such metamaterial allows precise spatial-spectral control of acoustic waves and opens new venue for high performance acoustic wave sensing, filtering, and nondestructive metrology.
Improving the Thermoelectric Properties of the Half-Heusler Compound VCoSb by Vanadium Vacancy
2019
Materials
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The effects of V vacancy on the thermoelectric performance of the half-Heusler compound VCoSb have been investigated in this study. A certain amount of CoSb secondary phase is generated in the VCoSb matrix when the content of V vacancy is more than 0.1 at%. According to the results, a ZT value of 0.6, together with a power factor of 29 μW cm−1 K−2 at 873 K, were achieved for the nonstoichiometric sample V0.9CoSb. This proved that moderate V vacancy could improve the thermoelectric (TE)
doi:10.3390/ma12101637
pmid:31137468
pmcid:PMC6566434
fatcat:znibciz3avektotkj36dd77cfq
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... s of VCoSb. The noticeable improvements are mainly owing to the incremental Seebeck coefficient, which may benefit from the optimized carrier concentration. However, too much V vacancy will result in more CoSb impurity and deteriorate the TE performances of VCoSb owing to the increased thermal conductivity.
Magnetized Plasma for Reconfigurable Subdiffraction Imaging
2011
Physical Review Letters
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Superlens capable of imaging beyond diffraction limits are normally made from metamaterials -artificially engineered materials with unconventional optical properties. In this Letter, we show that magnetized plasma with appropriately designed parameters supports nearly diffraction-less propagation of electromagnetic waves along the direction of the applied magnetic field, arising from their unbounded equi-frequency contour in the magnetized plasma. Such a unique feature can be utilized to
doi:10.1103/physrevlett.106.243901
pmid:21770571
fatcat:gc3kbl6wyncktf2tpxexnx4f64
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... ct sub-diffraction imaging devices, which is confirmed by detailed numerical investigations. Sub-diffraction imaging devices based on magnetic plasma do not require micro-fabrication normally entailed by construction of metamaterials, more importantly, they can be dynamically reconfigured by tuning the applied magnetic field or the plasma density, and therefore they represent a facile and powerful route for imaging applications.
CMC v2: Towards More Accurate COVID-19 Detection with Discriminative Video Priors
[article]
2022
arXiv
pre-print
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This paper presents our solution for the 2nd COVID-19 Competition, occurring in the framework of the AIMIA Workshop at the European Conference on Computer Vision (ECCV 2022). In our approach, we employ the winning solution last year which uses a strong 3D Contrastive Mixup Classifcation network (CMC v1) as the baseline method, composed of contrastive representation learning and mixup classification. In this paper, we propose CMC v2 by introducing natural video priors to COVID-19 diagnosis.
arXiv:2211.14557v1
fatcat:q7z2gwhncngubelr2gc6qmnfoy
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... fcally, we adapt a pre-trained (on video dataset) video transformer backbone to COVID-19 detection. Moreover, advanced training strategies, including hybrid mixup and cutmix, slicelevel augmentation, and small resolution training are also utilized to boost the robustness and the generalization ability of the model. Among 14 participating teams, CMC v2 ranked 1st in the 2nd COVID-19 Competition with an average Macro F1 Score of 89.11%.
Improved YOLOv3 Object Classification in Intelligent Transportation System
[article]
2020
arXiv
pre-print
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The technology of vehicle and driver detection in Intelligent Transportation System(ITS) is a hot topic in recent years. In particular, the driver detection is still a challenging problem which is conductive to supervising traffic order and maintaining public safety. In this paper, an algorithm based on YOLOv3 is proposed to realize the detection and classification of vehicles, drivers, and people on the highway, so as to achieve the purpose of distinguishing driver and passenger and form a
arXiv:2004.03948v1
fatcat:fr2o5wafvjdhlofdszelcje37i
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... to-one correspondence between vehicles and drivers. The proposed model and contrast experiment are conducted on our self-build traffic driver's face database. The effectiveness of our proposed algorithm is validated by extensive experiments and verified under various complex highway conditions. Compared with other advanced vehicle and driver detection technologies, the model has a good performance and is robust to road blocking, different attitudes, and extreme lighting.
Loss Function Search for Face Recognition
[article]
2020
arXiv
pre-print
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., 2018b; Zhang et al., 2019b) . In this paper, we empirically fixed it to 32 for all the methods.
Ablation Study Effect of reducing softmax probability. ...
arXiv:2007.06542v1
fatcat:ymu2spewjzcejhz25qdbqd2qmm
Synonymous SNPs of viral genes facilitate virus to escape host antiviral RNAi immunity
[article]
2018
bioRxiv
pre-print
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Synonymous single nucleotide polymorphisms (SNPs) are involved in codon usage preference or mRNA splicing. Up to date, however, the role of synonymous SNPs in immunity remains unclear. To address this issue, the SNPs of white spot syndrome virus (WSSV) were characterized in shrimp in the present study. Our results indicated that there existed synonymous SNPs in the mRNAs of wsv151 and wsv226, two viral genes of WSSV. In the presence of SNP siRNA, wild-type siRNA, wild-type mRNA and SNP mRNA of
doi:10.1101/496992
fatcat:kiumvtt6jjd6ffs4g4rjcxdjpy
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... sv151 or wsv226, RNAi was significantly suppressed, showing that the synonymous SNPs of wsv151 and wsv226 played negative roles in host siRNA pathway due to mismatch of siRNA with its target. In insect cells, the mismatch, caused by synonymous SNPs of wsv151 or wsv226, between siRNA and its target inhibited the host RNAi. Furthermore, the data revealed that the co-injection of SNP siRNA and wild-type siRNA of wsv151 or wsv226 into WSSV-infected shrimp led to a significant increase of WSSV copies compared with that of SNP siRNA alone or wild-type siRNA alone, indicating that the synonymous SNPs of viral genes could be a strategy of virus escaping host siRNA pathway in shrimp in vivo. Therefore, our study provided novel insights into the underlying mechanism of virus escaping host antiviral RNAi immunity by synonymous SNPs of viral genes.
Targeting Orphan Nuclear Receptors NR4As for Energy Homeostasis and Diabetes
2020
Frontiers in Pharmacology
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Frontiers in Pharmacology | www.frontiersin.org November 2020 | Volume 11 | Article 587457
Zhang et al. ...
In addition, a follow-up study demonstrated that NR4A1 was indispensable for the function of adipocyte progenitor (Zhang et al., 2018) . ...
doi:10.3389/fphar.2020.587457
pmid:33328994
pmcid:PMC7728612
fatcat:7zm464ryojhthblkaafpa65pdm
Damage Evaluation in Tempered Vacuum Glazing via Multivariate Statistical Methods
2021
Applied Sciences
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The performance of tempered vacuum glazing (TVG) strongly depends on the structural parameters and degree of damage of the products. In this paper, attention was paid to six performance indicators which had a major influence on the damage of TVG, and new evaluation parameters were derived from them using principal component analysis (PCA). In particular, hierarchical clustering analysis (HCA) based on Euclidean distance measurement enabled TVG products to be classified into three kinds.
doi:10.3390/app11114799
fatcat:dlpl34lrmjg6vg7xoho6prk3jq
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... ing the results of PCA, product quality classification was established according to the degree of damage. The evaluation method proposed in this work was found to be simple and reliable to provide references for damage detection of TVG.
Prediction and Analysis of the Thermal Performance of Composite Vacuum Glazing
2021
Energies
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In this paper, a prediction method of the heat transfer coefficient of composite vacuum glazing (CVG) is proposed. By analyzing the heat transfer process of CVG, the theoretical calculation formula for the heat transfer coefficient of CVG is established. CVG temperature variation under the test conditions specified in the national standard is simulated using ANSYS. The CVG heat transfer coefficient is calculated by combining the theoretical formula and simulation results. The simulation results
doi:10.3390/en14185769
fatcat:eefx46vasraatga3jqana76cum
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... are then verified by comparison to a physical experiment. The results show that the deviations between the experimental and predicted values are ≤3.8%, verifying the accuracy of the simulation results and proving that the model can be used in engineering practice. Furthermore, the effects of different coating positions on the heat transfer performance of CVG are studied. The results show that different coating positions have a significant impact on the heat transfer coefficient of CVG. The heat transfer coefficient is shown to be lowest to highest under the following conditions: when the Low-E coatings are located on both sides of the vacuum layer (2LC-V), followed by Low-E coatings on the side of glass pane II near the vacuum layer (1LC-V), Low-E coatings located on the side of glass pane I near insulating layer (1LC-I), and finally, when there are no Low-E coatings (NLC) on the glass panes. Overall, this model is an effective and accurate analysis method of the heat transfer coefficient.
Differences in chemical constituents of Artemisia annua L from different geographical regions in China
2017
PLoS ONE
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Author Contributions Conceptualization: Luqi Huang, Xiaobo Qu. ...
Acknowledgments We wish to thank Aijuan Shao and Dong Zhang from Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences for their help in plant samples collecting, identification ...
A. annua plant samples were identified by Dong Zhang from Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences. ...
doi:10.1371/journal.pone.0183047
pmid:28880869
pmcid:PMC5589120
fatcat:5trds2u4lnf6nn7wvw7dsv4t6a
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