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International Digital Design Invitation Exhibition
Boyang Feng,Chen Song,HanwenXU,He Gao,Kai Huo,Kuifang Li,Niu Wei,Shaopeng Han,Tingting Qu,Ting Li,Wang, di,Xu Yeni,Yanlin Xie,Bertrand Planes,Chi-Wook Nho,Jean-benoit Lallemant,Yeon Gyu-Seok,Bettina W 한국콘텐츠학회 2010 ICCC International Digital Design Invitation Exhib Vol.2010 No.12
Efficient Public Verification on the Integrity of Multi-Owner Data in the Cloud
Boyang Wang,Hui Li,Xuefeng Liu,Fenghua Li,Xiaoqing Li 한국통신학회 2014 Journal of communications and networks Vol.16 No.6
Cloud computing enables users to easily store their dataand simply share data with others. Due to the security threats inan untrusted cloud, users are recommended to compute verificationmetadata, such as signatures, on their data to protect the integrity. Many mechanisms have been proposed to allow a publicverifier to efficiently audit cloud data integrity without receivingthe entire data from the cloud. However, to the best of our knowledge,none of them has considered about the efficiency of publicverification on multi-owner data, where each block in data issigned by multiple owners. In this paper, we propose a novel publicverification mechanism to audit the integrity of multi-ownerdata in an untrusted cloud by taking the advantage of multisignatures. With our mechanism, the verification time and storageoverhead of signatures on multi-owner data in the cloud are independentwith the number of owners. In addition, we demonstratethe security of our scheme with rigorous proofs. Compared to thestraightforward extension of previousmechanisms, ourmechanismshows a better performance in experiments.
Liu, Boyang,Yang, Runjun,Li, Junya,Zhang, Lupei,Liu, Jing,Lu, Chunyan,Lian, Chuanjiang,Li, Zezhong,Zhang, Yong-Hong,Zhang, Liying,Zhao, Zhihui Asian Australasian Association of Animal Productio 2012 Animal Bioscience Vol.25 No.5
The FAT-1 protein is an n-3 fatty acid desaturase, which can recognize a range of 18- and 20-carbon n-6 substrates and transform n-6 polyunsaturated fatty acids (PUFAs) into n-3 PUFAs while n-3 PUFAs have beneficial effect on human health. Fat1 gene is the coding sequence from Caenorhabditis elegans which might play an important role on lipometabolism. To reveal the function of fat1 gene in bovine fetal fibroblast cells and gain the best cell nuclear donor for transgenic bovines, the codon of fat1 sequence was optimized based on the codon usage frequency preference of bovine muscle protein, and directionally cloned into the eukaryotic expression vector pEF-GFP. After identifying by restrictive enzyme digests with AatII/XbaI and sequencing, the fusion plasmid pEF-GFP-fat1 was identified successfully. The pEF-GFP-fat1 vector was transfected into bovine fetal fibroblast cells mediated by Lipofectamine2000$^{TM}$. The positive bovine fetal fibroblast cells were selected by G418 and detected by RT-PCR. The results showed that a 1,234 bp transcription was amplified by reverse transcription PCR and the positive transgenic fat1 cell line was successfully established. Then the expression level of fat1 gene in positive cells was detected using quantitative PCR, and the catalysis efficiency was detected by gas chromatography. The results demonstrated that the catalysis efficiency of fat1 was significantly high, which can improve the total PUFAs rich in EPA, DHA and DPA. Construction and expression of pEF-GFP-fat1 vector should be helpful for further understanding the mechanism of regulation of fat1 in vitro. It could also be the first step in the production of fat1 transgenic cattle.
Yafei Li,Xiaocheng Lan,Boyang Liu,Tiefeng Wang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
A stable and highly efficient supported Cu-Ni catalysts for the conversion of ethyl levulinate (EL) toc-valerolactone (GVL) was developed. The catalysts were characterized by XRD, TEM, TPD, TPR, andXPS. The support effect of metal oxides (Al2O3, SiO2, ZrO2, and TiO2) revealed that Cu-Ni supported onAl2O3 showed the highest activity for EL hydrogenation to ethyl 4-hydroxypentanoate (EHP) and thesubsequent intramolecular esterification of EHP to GVL. EHP intramolecular esterification to GVL in theethanol solution was a reversible reaction with an equilibrium constant of 24 at 453 K. A simplified reactionkinetic network was established. The solvent had a significant influence on the reaction equilibriumand the catalyst stability. Cu-Ni/Al2O3 in n-hexane solvent gave a higher GVL yield than that in ethanolsolvent, and showed better recyclability than that in toluene solvent. With optimizing the conditions, Cu-Ni/Al2O3 gave 99.9% conversion and 98% selectivity to GVL with a space–time yield of 1.13 gGVL gcat-1 h1 inn-hexane solvent with good recyclability.
Performance Prediction and Analysis of Adjustable-speed Permanent Magnet Eddy-current Couplings
Zhao Li,Boyang Qu,Dazhi Wang 한국자기학회 2019 Journal of Magnetics Vol.24 No.2
This paper presents an accurate yet simple analytical model to predict the torque characteristics of an adjustable-speed permanent magnet eddy-current coupling in the low slip working area. Based on an improved magnetic equivalent circuit method, the flux density is quantitatively calculated, and then the general explicit expression of electromagnetic torque is developed. Moreover, the saturation effect of ferromagnetic materials and the restricted slip have been reasonably taken into account. Compared with the 3-D finite element analysis and measurement results, the validity of this model is confirmed. In addition, several important parameters of such devices are analyzed and discussed.
Wang Jiaqi,Li Shixin,Li Boyang,Zhao Chenyu,Cui Ying 대한조선학회 2023 International Journal of Naval Architecture and Oc Vol.15 No.-
Most of the existing studies developed and improved local path planning algorithms independently of global planning, i.e., ignoring the global optimal constrains. To meet the requirements of practical applications, this paper presented an energy-efficient hierarchical collision avoidance algorithm for unmanned surface vehicle operating in clustered dynamic environments. For the global level, genetic algorithm was modified by strategies of greedy-inspired population initialization, penalty-based multiobjective fitness function, and joint crossover. For the local level, velocity obstacle was combined with dynamic window approach to provide the kinematic constraints of the vehicle to its admissible velocities and simplified collision avoidance rules to guide the evasive maneuvers. Simulations showed that the proposed global algorithm was superior to three other algorithms in terms of path length, path smoothness, and convergence speed regardless of the environment size. The performance of the local algorithm was also verified for various encounter scenarios and speed ratios. In addition, the combination of the global and local planning can effectively solve the path optimization and dynamic obstacle avoidance in a designed offshore environment of fish cage culture.
Yuhang Wang,Dongyong Li,Xubo Lai,Boyang Liu,Yibao Chen,Fengping Wang,Rongming Wang,Liuwan Zhang 한국물리학회 2020 Current Applied Physics Vol.20 No.2
The hysteresis in the transfer curve of MoS2 has significant impact on the device performance. However, the hysteresis mechanism is still not clear. Here, we investigate the hysteresis of the monolayer MoS2 by probing the local Fermi level variations as a function of the back gate voltage in different atmosphere using the Kelvin probe microscopy. While the Fermi level of the MoS2 in air is much lower than that in vacuum, both the MoS2 devices in vacuum and air show large Fermi level hysteresis. The Fermi level hysteresis direction is clock-wise, identical to that observed in the transfer curves. Both the hysteresis in Fermi level and transfer curve can be explained consistently by taking into account the charge trapping. Our findings confirm that carrier density modulation in MoS2 plays a vital role in the hysteresis, and provide insight into the hysteresis mechanism for the optimization of the device performance.
( Xiaochen Wang ),( Daoyi Xi ),( Yuehua Li ),( Junxiang Yan ),( Jingyun Zhang ),( Xi Guo ),( Boyang Cao ) 한국미생물생명공학회(구 한국산업미생물학회) 2021 Journal of microbiology and biotechnology Vol.31 No.4
Plesiomonas shigelloides, a member of the family Vibrionaceae, is a gram-negative, rod-shaped, facultative anaerobic bacterium with flagella. P. shigelloides has been isolated from such sources as freshwater, surface water, and many wild and domestic animals. P. shigelloides contains 102 Oantigens and 51 H-antigens. The diversity of O-antigen gene clusters is relatively poorly understood. In addition to O1 and O17 reported by other laboratories, and the 12 O serogroups (O2, O10, O12, O23, O25, O26, O32, O33, O34, O66, O75, and O76) reported previously by us, in the present study, nine new P. shigelloides serogroups (O8, O17, O18, O37, O38, O39, O44, O45, and O61) were sequenced and annotated. The genes for the O-antigens of these nine groups are clustered together in the chromosome between rep and aqpZ. Only O38 possesses the wzm and wzt genes for the synthesis and translocation of O-antigens via the ATP-binding cassette (ABC) transporter pathway; the other eight use the Wzx/Wzy pathway. Phylogenetic analysis using wzx and wzy showed that both genes are diversified. Among the nine new P. shigelloides serogroups, eight use wzx/wzy genes as targets. In addition, we developed an O-antigen-specific PCR assay to detect these nine distinct serogroups with no cross reactions among them.
Multi-Modal Stress Characteristics Under Coupling Effect of Strip and Work Roll
Jinxing Cui,Yan Peng,Jianliang Sun,Boyang Li 한국정밀공학회 2021 International Journal of Precision Engineering and Vol.22 No.10
In this paper, we investigate the rolling interface instability characteristics caused by the coupled motion of strip and the roll system. Based on the experimental test, the dynamical behaviors of the rolling mill under the motion of roll system and the strip show multi-modal vibration phenomenon, which are consistent with the variation of rolling interface force and energy parameters. Then, the dynamic geometric parameters of rolling interface and the dynamic stress models are established. Through the simulation analysis, it can be concluded the multi-modal stress state of the rolling interface is caused by the coupling motion of the strip and the roll system. The results show that the multi-modal stress of the rolling interface cause the rolling process instability, leading the "pulling " on the strip and "beating" on the work roll, which change the instability state of the rolling process. This study provides a theoretical basis for the study of multi-modal vibration characteristics of rolling mill.