http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Zhiguo Xia (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Zhiguo Xia,Peng Du,Libing Liao,Guowu Li,Shuai Jin 한국물리학회 2010 Current Applied Physics Vol.10 No.4
Eu2+ and Mn2+ co-doped calcium aluminate silicate chloride phosphors with the chemical composition of Ca3Al2Si2O8Cl4:Eu2+, Mn2+ have been prepared by a solid-state method, and their luminescence properties have been investigated by tuning the En2+/Mn2+ ions concentration. The phase formation and microstructure of Ca3Al2Si2O8Cl4:Eu2+, Mn2+ phosphors have been illuminated by XRD and SEM analysis. Photoluminescence (PL) spectrum reveals that Ca3Al2Si2O8Cl4:Eu2+ exhibits a strong blue emission band centered at 431 nm, while Ca3Al2Si2O8Cl4:Eu2+, Mn2+ can emit bluish-white light by adjusting the Mn2+ content appropriately. The energy transfer mechanism involving Eu2+–Mn2+ have also been investigated.
-
Haijun Geng,Han Zhang,Xingang Shi,Zhiliang Wang,Xia Yin,Ju Zhang,Zhiguo Hu,Yong Wu 한국통신학회 2020 Journal of communications and networks Vol.22 No.1
The internet is playing an increasingly crucial role inboth personal and business activities. In addition, with the emergenceof real-time, delay sensitive and mission-critical applications,stringent network availability requirement is put forward for internetservice providers (ISPs). However, commonly deployed intradomainlink-state routing protocols react to link failures by globallyexchanging link state advertisements and recalculating routingtable, inevitably causing significant forwarding discontinuityafter a failure. Therefore, the loop-free criterion (LFC) approachhas been widely deployed by many ISPs for coping with the singlenetwork component failure scenario in large internet backbones. The success of LFC lies in its inherent simplicity, but this comesat the expense of letting certain failure scenarios go unprotected. To achieve full failure coverage with LFC without incurring significantextra overhead, we propose a novel link protection scheme,hybrid link protection (HLP), to achieve failure resilient routing. Compared to previous schemes, HLP ensures high network availabilityin a more efficient way. HLP is implemented in two stages. Stage one provides an efficient LFC based method (MNP-e). Thecomplexity of the algorithm is less than that of Dijkstra’s algorithmand can provide the similar network availability with LFC. Stage two provides backup path protection (BPP) based on MNP-e,where only a minimum number of links need to be protected, usingspecial paths and packet headers, to meet the network availabilityrequirement. We evaluate these algorithms in a wide spread ofrelevant topologies, both real and synthetic, and the results revealthat HLP can achieve high network availability without introducingconspicuous overhead. HLP not only needs around 10% time ofthat of full protection, but also provides full protection capabilitiesthat full protection provide.
-
Xizhen Sun,Wei Li,Ce Zhang,Guibin Zhang,Zhiguo Xia 대한토목학회 2023 KSCE Journal of Civil Engineering Vol.27 No.12
Layered rock masses contain many pre-existing defects, and investigating their failure mechanism is crucial for controlling layered rock mass instability. In order to understand the layered rock fracture mechanism, this study develops sandstone combination models containing cracks of different angles using the Particle Flow Code software (PFC2D) to conduct the uniaxial loading tests. In addition, it analyzes the mechanical properties and fracture characteristics of the models. The pre-crack angles and the composite materials determine the mechanical properties and crack propagation of the sandstone combination (SC) models. The results indicated that the peak stress and elastic modulus of the SC models increase as the pre-crack angle rises. The force chain concentration and the crack initiation location change with the different pre-crack angles, and the initiation stress improves gradually. The entire acoustic emission (AE) process is divided into three phases per axial stress and AE event number. The AE active level significantly correlates with the pre-crack angle change. The “V” type trend is shown in the crack number distribution, and the tensile crack is the predominant mode with some shear cracks. The micro-crack concentration and macroscopic damage zones are more prevalent in the low-strength parts, and the pre-crack angles define the influence weight of the pre-crack angle and the composite material strength.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
