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  • 1
    Online Resource
    Online Resource
    GRID: a student project to monitor the transient gamma-ray sky in the multi-messenger astronomy era
    Springer Science and Business Media LLC ; 2019
    In:  Experimental Astronomy Vol. 48, No. 1 ( 2019-08-15), p. 77-95
    Details
    In: Experimental Astronomy, Springer Science and Business Media LLC, Vol. 48, No. 1 ( 2019-08-15), p. 77-95
    Type of Medium: Online Resource
    ISSN: 0922-6435 , 1572-9508
    URL: Article
    DOI: 10.1007/s10686-019-09636-w
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
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    detail.hit.zdb_id: 2012330-9
    SSG: 16,12
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  • 2
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    GRB 210121A: A Typical Fireball Burst Detected by Two Small Missions
    American Astronomical Society ; 2021
    In:  The Astrophysical Journal Vol. 922, No. 2 ( 2021-12-01), p. 237-
    Details
    In: The Astrophysical Journal, American Astronomical Society, Vol. 922, No. 2 ( 2021-12-01), p. 237-
    Abstract: The Chinese CubeSat Mission, Gamma Ray Integrated Detectors (GRID), recently detected its first gamma-ray burst, GRB 210121A, which was jointly observed by the Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor (GECAM). This burst is confirmed by several other missions, including Fermi and Insight-HXMT. We combined multimission observational data and performed a comprehensive analysis of the burst’s temporal and spectral properties. Our results show that the burst is relatively special in its high peak energy, thermal-like low-energy indices, and large fluence. By putting it to the E p – E γ ,iso relation diagram with assumed distance, we found that this burst can be constrained at the redshift range of [0.3, 3.0]. The thermal spectral component is also confirmed by the direct fit of the physical models to the observed spectra. Interestingly, the physical photosphere model also constrained a redshift of z ∼ 0.3 for this burst, which helps us to identify a host galaxy candidate at such a distance within the location error box. Assuming that the host galaxy is real, we found that the burst can be best explained by the photosphere emission of a typical fireball with an initial radius of r 0 ∼ 3.2 × 10 7 cm.
    Type of Medium: Online Resource
    ISSN: 0004-637X , 1538-4357
    URL: Article
    DOI: 10.3847/1538-4357/ac29bd
    RVK:
    UA 1000
    Language: Unknown
    Publisher: American Astronomical Society
    Publication Date: 2021
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    detail.hit.zdb_id: 1473835-1
    SSG: 16,12
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  • 3
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    Experimental study of the dielectric properties of energy-containing materials at variable temperatures
    AIP Publishing ; 2023
    In:  Review of Scientific Instruments Vol. 94, No. 3 ( 2023-03-01)
    Details
    In: Review of Scientific Instruments, AIP Publishing, Vol. 94, No. 3 ( 2023-03-01)
    Abstract: Due to the inherent material characteristics of fireworks and negligent safety management, safety accidents have occurred in recent years, resulting in significant personal and property losses. Therefore, the status inspection of fireworks and other energy-containing materials is a hot issue in the field of energy-containing materials production, storage, transportation, and application. The dielectric constant is a parameter used to characterize the interaction between materials and electromagnetic waves. The methods of obtaining this parameter in the microwave band are not only numerous but also fast and easy. Thus, the real-time status of energy-containing materials can be monitored by monitoring their dielectric properties. Usually, temperature variation has an important effect on the state of energy-containing materials, and the accumulation of temperature can directly cause energy-containing materials to burn or even explode. Based on the above background, this paper proposes a method for testing the dielectric properties of energy-containing materials under variable temperature conditions based on the resonant cavity perturbation theory, which provides important theoretical support for testing the state of energy-containing materials under variable temperatures. Based on the constructed test system, the law of the variation of the dielectric constant of black powder with temperature was obtained, and the theoretical analysis of the test results was carried out. Experimental results show that the temperature change will induce chemical changes in the black powder material, specifically in its dielectric properties, and the magnitude of the changes is large, which is very conducive to real-time monitoring of the black powder state. The system and method developed in this paper can be used to obtain the high-temperature evolution of the dielectric properties of other types of energy-containing materials and provide technical support for the safe production, storage, and application of various types of energy-containing materials.
    Type of Medium: Online Resource
    ISSN: 0034-6748 , 1089-7623
    URL: Article
    DOI: 10.1063/5.0140091
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2023
    detail.hit.zdb_id: 209865-9
    detail.hit.zdb_id: 1472905-2
    SSG: 11
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  • 4
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    Anatomical Prior and Inter-Slice Consistency for Semi-Supervised Vertebral Structure Detection in 3D Ultrasound Volume
    Institute of Electrical and Electronics Engineers (IEEE) ; 2024
    In:  IEEE Journal of Biomedical and Health Informatics Vol. 28, No. 4 ( 2024-4), p. 2211-2222
    Details
    In: IEEE Journal of Biomedical and Health Informatics, Institute of Electrical and Electronics Engineers (IEEE), Vol. 28, No. 4 ( 2024-4), p. 2211-2222
    Type of Medium: Online Resource
    ISSN: 2168-2194 , 2168-2208
    URL: Article
    DOI: 10.1109/JBHI.2024.3360102
    Language: Unknown
    Publisher: Institute of Electrical and Electronics Engineers (IEEE)
    Publication Date: 2024
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    detail.hit.zdb_id: 2687987-6
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  • 5
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    Can the Neutrophil to Lymphocyte Ratio Be Used to Determine Gastric Cancer Treatment Outcomes? A Systematic Review and Meta-Analysis
    Wiley ; 2016
    In:  Disease Markers Vol. 2016 ( 2016), p. 1-10
    Details
    In: Disease Markers, Wiley, Vol. 2016 ( 2016), p. 1-10
    Abstract: The prognostic role of neutrophil to lymphocyte ratio (NLR) in gastric cancer remains controversial. We aimed to quantify the prognostic role of peripheral blood NLR in gastric cancer. A literature search was conducted in PubMed, EMBASE, and Cochrane databases. The results for overall survival (OS) and progression-free survival (PFS)/disease-free survival (DFS) are expressed as hazard ratios (HRs) with 95% confidence intervals (CIs). 19 studies with 5431 patients were eligible for final analysis. Elevated NLRs were associated with a significantly poor outcome for OS (HR = 1.98; 95% CI: 1.75–2.24, p 〈 0.001 ) and PFS (HR = 1.58; 95% CI: 1.32–1.88, p 〈 0.001 ) compared with patients who had normal NLRs. The NLR was higher for patients with late-stage compared with early-stage gastric cancer (OR = 2.76; 95% CI: 1.36–5.61, p = 0.005 ). NLR lost its predictive role for patients with stage IV gastric cancer who received palliative surgery (HR = 1.73; 95% CI: 0.85–3.54, p = 0.13 ). Our results also indicated that prognoses might be influenced by the NLR cutoff values. In conclusion, elevated pretreatment NLRs are associated with poor outcome for patients with gastric cancer. The ability to use the NLR to evaluate the status of patients may be used in the future for personalized cancer care.
    Type of Medium: Online Resource
    ISSN: 0278-0240 , 1875-8630
    URL: Article
    DOI: 10.1155/2016/7862469
    Language: English
    Publisher: Wiley
    Publication Date: 2016
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    detail.hit.zdb_id: 2033253-1
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  • 6
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    Study on the mechanical, friction and wear properties of modified polyoxymethylene under free abrasive condition
    Wiley ; 2023
    In:  Journal of Applied Polymer Science Vol. 140, No. 26 ( 2023-07-10)
    Details
    In: Journal of Applied Polymer Science, Wiley, Vol. 140, No. 26 ( 2023-07-10)
    Abstract: The mechanical, friction and wear properties of different modified polyoxymethylene (POM) are presented in the paper under free abrasive grinding condition. The shore hardness and elastic modulus of the POM matrix increased with carbon fiber (CF) filling, its shore hardness and elastic modulus were 85 HD and 5000 MPa, respectively. The hardness and elastic modulus of the POM matrix decreased with polytetrafluoroethylene (PTFE) and graphite (C) filling. The average coefficient of friction of POM was 0.254. When PTFE, CF, and graphite were added, the coefficient of friction of the POM would be reduced under free abrasive condition. The coefficient of friction of POM filled with PTFE or graphite was about 0.15, the coefficient of friction of POM filled with CF was about 0.18. It could be seen from the orthogonal test analysis that the wear resistance of four types of materials was CF‐POM  〉  POM  〉  PTFE‐POM  〉  C‐POM. When the test duration was 1.5 h, the wear amount of C‐POM was between 3 and 9 mg, the wear amount of CF‐POM was less than 1.23 mg. The speed and load were the main factors affecting the wear amount of these materials, followed by the abrasive particle diameter, and the abrasive mass fraction had the least effect on them.
    Type of Medium: Online Resource
    ISSN: 0021-8995 , 1097-4628
    URL: Issue
    URL: Article
    DOI: 10.1002/app.v140.26
    DOI: 10.1002/app.53997
    Language: English
    Publisher: Wiley
    Publication Date: 2023
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  • 7
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    Liquid crystalline reduced graphene oxide composite fibers as artificial muscles
    Elsevier BV ; 2023
    In:  Materials Today Vol. 69 ( 2023-10), p. 19-30
    Details
    In: Materials Today, Elsevier BV, Vol. 69 ( 2023-10), p. 19-30
    Type of Medium: Online Resource
    ISSN: 1369-7021
    URL: Article
    DOI: 10.1016/j.mattod.2023.08.003
    Language: English
    Publisher: Elsevier BV
    Publication Date: 2023
    detail.hit.zdb_id: 1480250-8
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  • 8
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    Mimicry of a biophysical pathway leads to diverse pollen-like surface patterns
    Proceedings of the National Academy of Sciences ; 2020
    In:  Proceedings of the National Academy of Sciences Vol. 117, No. 18 ( 2020-05-05), p. 9699-9705
    Details
    In: Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 117, No. 18 ( 2020-05-05), p. 9699-9705
    Abstract: A ubiquitous structural feature in biological systems is texture in extracellular matrix that gains functions when hardened, for example, cell walls, insect scales, and diatom tests. Here, we develop patterned liquid crystal elastomer (LCE) particles by recapitulating the biophysical patterning mechanism that forms pollen grain surfaces. In pollen grains, a phase separation of extracellular material into a pattern of condensed and fluid-like phases induces undulations in the underlying elastic cell membrane to form patterns on the cell surface. In this work, LCE particles with variable surface patterns were created through a phase separation of liquid crystal oligomers (LCOs) droplet coupled to homeotropic anchoring at the droplet interface, analogously to the pollen grain wall formation. Specifically, nematically ordered polydisperse LCOs and isotropic organic solvent (dichloromethane) phase-separate at the surface of oil-in-water droplets, while, different LCO chain lengths segregate to different surface curvatures simultaneously. This phase separation, which creates a distortion in the director field, is in competition with homeotropic anchoring induced by sodium dodecyl sulfate (SDS). By tuning the polymer chemistry of the system, we are able to influence this separation process and tune the types of surface patterns in these pollen-like microparticles. Our study reveals that the energetically favorable biological mechanism can be leveraged to offer simple yet versatile approaches to synthesize microparticles for mechanosensing, tissue engineering, drug delivery, energy storage, and displays.
    Type of Medium: Online Resource
    ISSN: 0027-8424 , 1091-6490
    URL: Article
    DOI: 10.1073/pnas.1919060117
    RVK:
    TA 1000
    RVK:
    WA 15000
    Language: English
    Publisher: Proceedings of the National Academy of Sciences
    Publication Date: 2020
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    detail.hit.zdb_id: 1461794-8
    SSG: 11
    SSG: 12
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  • 9
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    Research on Evaluation Elements of Urban Agricultural Green Bases: A Causal Inference-Based Approach
    MDPI AG ; 2023
    In:  Land Vol. 12, No. 8 ( 2023-08-20), p. 1636-
    Details
    In: Land, MDPI AG, Vol. 12, No. 8 ( 2023-08-20), p. 1636-
    Abstract: The construction of agricultural green bases is an important part of sustainable agricultural development. This paper takes urban agriculture green bases in Shanghai as an example, choosing base construction elements, production, and ecological construction elements, as well as status assessment elements as evaluation indicators, in order to construct an evaluation system for urban agriculture green bases. Using a Bayesian network, typical urban agricultural green bases in six agricultural districts of Shanghai were evaluated. The construction of the evaluation system was analyzed by using intervention, counterfactual inference, and other methods to analyze the correlation and importance of the indicators. The results show that there are differences among the bases in various indicators, but they all reach a high level overall; base construction elements as well as production and ecological construction elements are the main factors affecting the level of urban agricultural green bases; improving the base management system (BMS), innovativeness (IN), and economic benefits (EBs) are key ways to improve the production capacity of agriculture green bases. Green base construction should pay attention to top-level design, coordinate the planning of industrial layout, technical mode, scientific and technological support, and supporting policies. Based on the conclusion, this paper provides some useful recommendations for creating urban agriculture green bases, which help promote urban agriculture transformation, upgrading, and coordinating development between urban and rural areas.
    Type of Medium: Online Resource
    ISSN: 2073-445X
    URL: Article
    DOI: 10.3390/land12081636
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2682955-1
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  • 10
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    3D‐Printed Photoresponsive Liquid Crystal Elastomer Composites for Free‐Form Actuation
    Wiley ; 2023
    In:  Advanced Functional Materials Vol. 33, No. 4 ( 2023-01)
    Details
    In: Advanced Functional Materials, Wiley, Vol. 33, No. 4 ( 2023-01)
    Abstract: Direct ink writing of liquid crystal elastomers (LCEs) offers a new opportunity to program geometries for a wide variety of shape transformation modes toward applications such as soft robotics. So far, most 3D‐printed LCEs are thermally actuated. Herein, a 3D‐printable photoresponsive gold nanorod (AuNR)/LCE composite ink is developed, allowing for photothermal actuation of the 3D‐printed structures with AuNR as low as 0.1 wt.%. It is shown that the printed filament has a superior photothermal response with 27% actuation strain upon irradiation to near‐infrared (NIR) light (808 nm) at 1.4 W cm −2 (corresponding to 160 °C) under optimal printing conditions. The 3D‐printed composite structures can be globally or locally actuated into different shapes by controlling the area exposed to the NIR laser. Taking advantage of the customized structures enabled by 3D printing and the ability to control locally exposed light, a light‐responsive soft robot is demonstrated that can climb on a ratchet surface with a maximum speed of 0.284 mm s −1 (on a flat surface) and 0.216 mm s −1 (on a 30° titled surface), respectively, corresponding to 0.428 and 0.324 body length per min, respectively, with a large body mass (0.23 g) and thickness (1 mm).
    Type of Medium: Online Resource
    ISSN: 1616-301X , 1616-3028
    URL: Issue
    URL: Article
    DOI: 10.1002/adfm.v33.4
    DOI: 10.1002/adfm.202210614
    Language: English
    Publisher: Wiley
    Publication Date: 2023
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    detail.hit.zdb_id: 2039420-2
    SSG: 11
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