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Libin Wang,Weiqi Luo,Xiuxiu Sun,Chunlu Qian 한국원예학회 2018 Horticulture, Environment, and Biotechnology Vol.59 No.6
Flavor quality is import for determining consumer perception and acceptance of tomato products. In this study, ‘Fendou’tomato fruit were harvested at six ripening stages and sampled to investigate the development of fl avor-relevant compoundsduring vine ripening. Results showed that upon the initiation of ripening there was an increase in respiration rate and concomitantethylene evolution that was associated with increased membrane permeability. In accordance with these physiologicalchanges, fl avor-relevant compounds demonstrated diff erent expression patterns as fruit ripened, which contributedto ‘red-ripe’ fl avor characteristics of red-ripe fruit. Based on correlation analysis between ethylene evolution and the fl avorrelevantcompounds during ‘Fendou’ tomato ripening and the other researchers’ reports, the activation of System 2-dependentautocatalytic ethylene production plays an important role in the development of most fl avor-relevant compounds duringtomato vine ripening. Overall, our results suggested that most fl avor-relevant compounds that accumulated the most duringtomato fruit ripening at red stage could be under ethylene regulation and were among the most important contributors tothe ‘red-ripe’ fl avor. Due to the development of these compounds, the fl avor quality at late ripening stages is diff erent fromthat of fruit at early ripening stages.
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Efficient and Secure Certificateless Proxy Re-Encryption
( Ya Liu ),( Hongbing Wang ),( Chunlu Wang ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.4
In this paper, we present an IND-CCA2 secure certificateless proxy re-encryption scheme in the random oracle model. A certificateless public key cryptography simplifies the certificate management in a traditional public key infrastructure and the built-in key escrow feature in an identity-based public key cryptography. Our scheme shares the merits of certificateless public key encryption cryptosystems and proxy re-encryption cryptosystems. Our certificateless proxy re-encryption scheme has several practical and useful properties - namely, multi-use, unidirectionality, non-interactivity, non-transitivity and so on. The security of our scheme bases on the standard bilinear Diffie-Hellman and the decisional Bilinear Diffie-Hellman assumptions.
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Chi Liu,Xiaoli Liu,Chunlu Wu,Enzhi Wang,Sijing Wang,Haoyang Peng 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.3
The mechanical properties and failure mechanisms of geomaterials are greatly affected by their heterogeneity. As a special complex rock medium, the mechanical response of red bed soft rock is of considerable importance in stability analyses and the protection of slopes. In this study, X-ray micro-computerized tomography (micro-CT) was used to obtain the spatial distribution of minerals in red bed soft rock. An image processing procedure was proposed to incorporate the extracted mesoscopic mineral and crack distribution into the model of the grain-based finite-discrete element method (GB-FDEM). Subsequently, a uniaxial compression test and Brazilian disc splitting test were performed to obtain the mechanical response and failure modes of mudstone. The microscopic fracture morphology and traces of intragranular and intergranular cracks under tensile and shear stress were analyzed in detail. The numerical results show that the GB-FDEM model successfully characterized the mechanical response, which was similar to that of the laboratory tests and the traditional homogeneous models. The presence of minerals and pre-existing cracks disturbed the stress distribution in the heterogeneous model, which resulted in a difference in local stress that reasonably explained the phenomenon of local fragmentation. The simulated macroscopic failure mode of the heterogeneous models was most consistent with the results of the laboratory tests. The systematic framework proposed in this study provides a powerful tool for further understanding the multiscale (micro, meso, and macro) failure mechanism of red bed soft rock and predicting a realistic fracture process while reducing the tedious and redundant laboratory tests.
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