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RISS 인기검색어
- 검색키워드
- 저자 : Lifeng Jiang (검색결과 6 건)
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Contrastive Analysis on Network Performance of Information System
Lifeng Jiang,Fengming Zhang,Rennong Yang,Kun Xu 보안공학연구지원센터 2015 International Journal of Multimedia and Ubiquitous Vol.10 No.7
In order to explore how to design an information system with ideal network property under the background of information era, contrastive analysis is conducted in this paper on the performances of “tree” network and fully connected network. The mathematical models of “tree” information system and fully connected network are established, of which the network performance indicators are calculated by complex network theory and analyzed by comparison. As only partial indicators of both networks are favorable, the plan is proposed that information system is established through optimization based on both of the two network structures. The new algorithm to build information system network model proposed in this paper and the plan that information system is established are of significant reference value for relevant fields.
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Jingnong Jiang,Lifeng Wang 한국물리학회 2017 Current Applied Physics Vol.17 No.12
This paper proposes a continuum three-segment double Timoshenko beam (TSDTB) model to investigate free vibration of double-walled carbon nanotubes (DWCNTs) bridged on a silicon channel. Accurate explicit formulas of the van der Waals (vdW) interactions between each tube as well as between the tubes and a substrate are derived for a better prediction of the vibrational behaviors of the DWCNTs. An analytical modified Fourier series method (MFSM) is developed for the vibrational analysis of the TSDTB model. Numerical results show the good convergence characteristics and accuracy of the MSFM. The overlapped lengths between DWCNTs and the substrate at both ends have almost no effects on the lower natural frequencies of the TSDTB model when the overlapped lengths are long enough. Moreover, the natural frequencies of the TSDTB model are much less than of those of one-segment double Timoshenko beam (OSDTB) model with clamped supported boundary condition, whereas the TSDTB model can be equivalent to the simply supported OSDTB model under certain condition. In addition, the effects of vdW interaction coefficients on the vibrational behaviors of the DWCNTs are also revealed. The obtained results in this work should be greatly helpful in the design and application of CNTs-based nanomechanical resonators.
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Manganese induces neuroinflammation via NF-κB/ROS NLRP3 pathway in rat brain striatum and HAPI cells
Xinyuan Zhao,Lifeng Yin,Yifan Wu,Muxi Han,Yin Zhuang,Yewen Cong,Yiming Liu,Gang Chen,Junkang Jiang 대한독성 유전단백체 학회 2019 Molecular & cellular toxicology Vol.15 No.2
Backgrounds: Chronic exposure to excessive Mn can result in neurodegenerative symptoms, whose precise molecular mechanism remains largely unclear. Here, we measured the role and mechanism of NLRP3 in Mninduced neuroinflammation in vivo and vitro. Methods: The effects of Mn on NLRP3 activation were investigated by Westernblot, IHC, immunofluorescence analysis, as well as ELISA. We assessed NF-κB activation through measurement of phosphorylation and nuclear translocation. The mechanisms bywhich Mn induced NLRP3 activation were assessed by specific inhibitors. Results: We found that Mn exposure facilitated the activation of NLRP3 inflammasome to promote the production of IL-1β and IL-18 in dose- and time-dependent manners in HAPI cells. In addition, the NLRP3 inflammasome was also dramatically activated in microglia of rat brain striatum after Mn exposure. We also found increased ROS and NF-κB activation. Notably, the activation of NLRP3 was significantly attenuated by pretreatment with NF-κB and ROS inhibitors. Conclusion: These findings suggest that NLRP3 activation plays an important role in Mn-induced neuroinflammation, and it is associated with NF-κB and ROS.
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Yanping Lei,Yongliang Xiao,Lifeng Li,Chaoqiang Jiang,Chaolong Zu,Tian Li,Hui Cao 한국미생물학회 2017 The journal of microbiology Vol.55 No.5
Tobacco-rice rotation is a common farming system in southChina, and many tillage practices such as straw mulching, dolomitedust, and quicklime application have been adopted toimprove crop production. These agricultural managementpractices alter soil physical and chemical properties and affectmicrobial life environment and community composition. Inthis research, six tillage practices including no tobacco andrice straw mulching (CK), tobacco and rice straw mulching(TrSr), rice straw returning fire (TrSc), tobacco and rice strawmulching with dolomite dust (TSD), rice straw returning fireand quicklime (TSQ), and rice straw returning fire, quicklimeand reduced fertilizer (TSQf) were conducted to detect changesin soil bacterial diversity and composition using Illumina sequencing. The results showed that the total number of operationaltaxonomic units (OTUs) from the six treatments was2030, and the number of mutual OTUs among all sampleswas 550. The TrSc treatment had the highest diversity andrichness, while TSQf had the lowest. Soil physio-chemicalproperties and microbial diversity can influence each other. Proteobacteria and Actinobacteria had the greatest proportionin all treatments. The abundance of Nitrospirae was thehighest in the TrSc treatment. The TSQf treatment had thehighest abundance of Firmicutes. The abundance of Nitrospirain the TrSc treatment was 2.29-fold over CK. Streptomycesaffiliated with Firmicutes improved by 37.33% in TSQf comparedto TSQ. TSQf treatment was considered to be the mostimportant factor in determining the relative abundance atthe genus level.
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Tunable random lasing behavior in plasmonic nanostructures
Yadav Ashish,Zhong Liubiao,Sun Jun,Jiang Lin,Cheng Gary J.,Chi Lifeng 나노기술연구협의회 2017 Nano Convergence Vol.4 No.1
Random lasing is desired in plasmonics nanostructures through surface plasmon amplification. In this study, tunable random lasing behavior was observed in dye molecules attached with Au nanorods (NRs), Au nanoparticles (NPs) and Au@Ag nanorods (NRs) respectively. Our experimental investigations showed that all nanostructures i.e., Au@AgNRs, AuNRs & AuNPs have intensive tunable spectral effects. The random lasing has been observed at excitation wavelength 532 nm and varying pump powers. The best random lasing properties were noticed in Au@AgNRs structure, which exhibits broad absorption spectrum, sufficiently overlapping with that of dye Rhodamine B (RhB). Au@AgNRs significantly enhance the tunable spectral behavior through localized electromagnetic field and scattering. The random lasing in Au@AgNRs provides an efficient coherent feedback for random lasers.
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