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RISS 인기검색어
- 검색키워드
- 저자 : Dechuan Wang (검색결과 5 건)
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THE STRONG MORI PROPERTY IN RINGS WITH ZERO DIVISORS
Dechuan Zhou,Fanggui Wang 대한수학회 2015 대한수학회보 Vol.52 No.4
An SM domain is an integral domain which satisfies the ascending chain condition on w-ideals. Then an SM domain also satisfies the descending chain condition on those chains of v-ideals whose intersection is not zero. In this paper, a study is begun to extend these properties to commutative rings with zero divisors. A Q0-SM ring is defined to be a ring which satisfies the ascending chain condition on semiregular w-ideals and satisfies the descending chain condition on those chains of semiregular v-ideals whose intersection is semiregular. In this paper, some properties of Q0-SM rings are discussed and examples are provided to show the difference between Q0-SM rings and SM rings and the difference between Q0-SM rings and Q0-Mori rings.
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Energy-Efficient Secure Multiuser Scheduling in Energy Harvesting Untrusted Relay Networks
Dechuan Chen,Yunpeng Cheng,Xiangdong Wang,Weiwei Yang,Jianwei Hu,Yueming Cai 한국통신학회 2019 Journal of communications and networks Vol.21 No.4
In this paper, we investigate opportunistic secure multiuserscheduling in energy harvesting untrusted relay networks,where an energy-constrained amplify-and-forward (AF) relay harvestsenergy from the received radio frequency signal via usingthe power splitting protocol. To exploit the potential advantages(e.g., multiuser diversity and direct links) for secrecy improvement,we examine three opportunistic user scheduling schemes,i.e., optimal scheduling scheme, maximum scheduling scheme, andminimum scheduling scheme. Specifically, the optimal schedulingscheme performs user selection by maximizing the ratio betweenthe signal-to-noise-ratio (SNR) at the destination and the correspondingSNR at the untrusted relay. The maximum schedulingscheme is conventional user selection that maximizes the channelgain of the direct links. For the minimum scheduling scheme, wetry to reduce the overheard information at the untrusted relay byselecting the user with the lowest channel gain of the relay links. For these three schemes, we comprehensively examine the achievablesecrecy performance including probability of positive secrecyrate, secrecy outage probability (SOP), asymptotic SOP, secrecythroughput (ST), as well as secure energy efficiency (SEE) to helpfacilitate an energy-efficient secure transmission design. Simulationresults demonstrate that the maximum scheduling scheme outperformsthe minimum scheduling scheme in terms of SOP at relativelylow SNRs and target secrecy rates.
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THE STRONG MORI PROPERTY IN RINGS WITH ZERO DIVISORS
ZHOU, DECHUAN,WANG, FANGGUI Korean Mathematical Society 2015 대한수학회보 Vol.52 No.4
An SM domain is an integral domain which satisfies the ascending chain condition on w-ideals. Then an SM domain also satisfies the descending chain condition on those chains of v-ideals whose intersection is not zero. In this paper, a study is begun to extend these properties to commutative rings with zero divisors. A $Q_0$-SM ring is defined to be a ring which satisfies the ascending chain condition on semiregular w-ideals and satisfies the descending chain condition on those chains of semiregular v-ideals whose intersection is semiregular. In this paper, some properties of $Q_0$-SM rings are discussed and examples are provided to show the difference between $Q_0$-SM rings and SM rings and the difference between $Q_0$-SM rings and $Q_0$-Mori rings.
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ON STRONGLY GORENSTEIN HEREDITARY RINGS
Hu, Kui,Kim, Hwankoo,Wang, Fanggui,Xu, Longyu,Zhou, Dechuan Korean Mathematical Society 2019 대한수학회보 Vol.56 No.2
In this note, we mainly discuss strongly Gorenstein hereditary rings. We prove that for any ring, the class of SG-projective modules and the class of G-projective modules coincide if and only if the class of SG-projective modules is closed under extension. From this we get that a ring is an SG-hereditary ring if and only if every ideal is G-projective and the class of SG-projective modules is closed under extension. We also give some examples of domains whose ideals are SG-projective.
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Jing Jin,Yuanjin Chen,Dechuan Wang,Lingman Ma,Min Guo,Changlin Zhou,Jie Dou 대한약학회 2018 Archives of Pharmacal Research Vol.41 No.6
Baicalin was identified as a neuraminidase (NA)inhibitor displaying anti-influenza A virus (IAV) activity. However, its poor solubility in saline has limited its use inthe clinic. We generated sodium baicalin and showed that itexhibited greatly increased solubility in saline. Its efficacyagainst oseltamivir-resistant mutant A/FM/1/47-H275Y(H1N1-H275Y) was evaluated in vitro and in vivo. Resultsshowed that 10 lM of sodium baicalin inhibited A/FM/1/47 (H1N1), A/Beijing/32/92 (H3N2) and H1N1-H275Y inMDCK cells in a dose-dependent manner, with inhibitoryrates of 83.9, 75.9 and 47.7%, respectively. Intravenousadministration of sodium baicalin at 100 mg/kg/d enabledthe survival of 20% of H1N1-H275Y-infected mice. Thetreatment alleviated body weight loss and lung injury. Moreover, sodium baicalin exerted a clear inhibitory effecton NAs. The IC50 values of sodium baicalin against H1N1-H275Y and cells-expressing A/Anhui/1/2013-R294K(H7N9-R294K) NA protein (N9-R294K) were 214.4 lMand 216.3 lM. Direct interactions between sodium baicalinand NA were observed, and we simulated the interactionsof sodium baicalin with N9-R294K and N9 near the activesites of OC-N9-R294K and OC-N9. The residues responsiblefor the sodium baicalin-N9-R294K and sodiumbaicalin-N9 interactions were the same, confirming thatsodium baicalin exerts effects on wild-type and oseltamivir-resistant viral strains.
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