Source Rupture Process Analysis of Two Great Kamchatka Earthquakes from Broadband Waveform Data

Gao, Yuan,Wu, Zhong-liang,Zhou, Hui-lan 한국지진연구소 1997 SAFE Vol.3 No.1

The broadband waveform data are used in this paper in do waveform modeling by the overlapped subevents and then to analyze the rupture feature of unilateral rupture source in terms of station quasi-source time function(qSTF) and subevent quasi-time difference(qTD)

Combined pre-detection and sleeping for energy-efficient spectrum sensing in cognitive radio networks

Gao, Yuan,Deng, Zhixiang,Choi, Dongmin,Choi, Chang Elsevier 2018 Journal of parallel and distributed computing Vol.114 No.-

<P><B>Abstract</B></P> <P>In this paper, we propose a cooperative spectrum sensing scheme including a combined pre-detection and sleeping policy. In the scheme, the designed pre-detection sub-phase is applied at the beginning of the detection of the presence of a primary user, where all sensing nodes are involved to improve the detection performance. The sleeping policy is applied for each sensing node respectively at the end of the pre-detection sub-phase and the beginning of the transmission of the local detection results, in order to decrease sensing energy consumption. We formulate the problem of minimizing the maximum average energy consumption per sensing node in Rayleigh fading channels, considering the constraints of the required global detection and false alarm probabilities and the tolerable interference caused to the primary user. Numerical results show that the scheme achieves significant energy saving as compared to a scheme that includes only a sleeping policy and does not consider pre-detection.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We propose a combined pre-detection and sleeping scheme for spectrum sensing. </LI> <LI> The sensing performance is not affected by a high sleeping rate of secondary relays. </LI> <LI> An analytical framework is based on more practical channel conditions. </LI> <LI> A search algorithm is studied to obtain low complexity for solving the optimal problem. </LI> <LI> The proposed scheme achieves significant energy saving for spectrum sensing. </LI> </UL> </P>

Research on reliability of centrifugal compressor unit based on dynamic Bayesian network of fault tree mapping

Gao Yuan,Zhang Liang,Zhou Jiawei,Wei Bojia,Yan Zhongchao 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.5

For the first time, the fault tree mapping dynamic Bayesian network (DBN) method is applied to the reliability research study of centrifugal compressor units, and its usability and reliability are evaluated dynamically. First, the fault data using the K-means method eliminates abnormal data and builds a fault tree model. The structure is mapped to the DBN structure to complete the structure learning, and the logic gate is mapped to the conditional probability to achieve the parameter learning. Then the model is solved bidirectionally. The change rule of system node reliability with time is solved forward, and the posterior probability of the system node is solved reversely to complete fault diagnosis. Finally, Monte Carlo simulation analysis and the Markov process verify the dynamic reliability and steady-state availability. The results show that the Monte Carlo simulation method is almost consistent with the reliability prediction curve of the DBN model. Indicating that the accuracy of the DBN model is reliable and the computational efficiency is improved by about 81434 times. The steady-state availability calculated using the DBN model is approximately 0.99963, which is close to reality compared to the Markov process. This method can better describe centrifugal compressor units’ dynamic reliability and maintainability and provide decision support for regular maintenance of essential parts and enterprise procurement.

Disciplinary Sport Physiology Health Education , Sport Medicine : The treatment research of the volleyball players tniurv of ankle soft tissue

Gao Yuan 한국체육학회 1996 국제스포츠과학 학술대회 Vol.1996 No.2

전염병 위기와 방역시스템 인식 분석 및 대응 방안

Gaoyuan Li(Gaoyuan Li) 충북대학교 국가위기관리연구소 2020 위기관리연구논총 Vol.4 No.2

Characterization of 14-3-3 gene family and their expression patterns under abiotic and biotic stresses in melon (Cucumis melo L.)

Zhang Gaoyuan,Wei Bingqiang 한국원예학회 2023 Horticulture, Environment, and Biotechnology Vol.64 No.6

Several studies have shown that the plant 14-3-3 gene family plays an important role in plant growth and development, as well as its response to abiotic and biotic stresses. At present, the 14-3-3 gene family has been found successively in many plants; however, no detailed characterization and expression profi les of the 14-3-3 gene family are found in melon. Thus, the author performed genome-wide identifi cation, characterization and expression pattern in diff erent tissues and under various abiotic and biotic stresses by analyzing the published RNA-Seq raw data from NCBI database. Nine 14-3-3 genes in melon were identifi ed and classifi ed as non-epsilon and epsilon groups based on the orthologs of Arabidopsis 14-3-3 genes and dispersedly distributed on fi ve chromosomes. The majority of melon 14-3-3 members contained 300 amino acids or less, which might localize in the nucleus. Members of the epsilon group commonly contained more exons or introns than those of the non-epsilon group. Gene duplication analysis indicated that segmental duplication was dominant in the expansion of the melon 14-3-3 family. Many cis -elements in response to diff erent stresses and hormones were predicted by using the PlantCARE server . The published RNA-Seq showed that several 14-3-3 genes showed signifi cant expression changes in diff erent tissues, during fruit development and under salt, cold and pathogen stresses at a certain time point. These results provided a general introduction to melon 14-3-3 genes and a preliminary basis for later functional verifi cation.

The roles of N6-methyladenosine and its target regulatory noncoding RNAs in tumors: classification, mechanisms, and potential therapeutic implications

Liu Ziying,Gao Lei,Cheng Long,Lv Gaoyuan,Sun Bei,Wang Gang,Tang Qiushi 생화학분자생물학회 2023 Experimental and molecular medicine Vol.55 No.-

N6-methyladenosine (m6A) is one of the epigenetic modifications of RNA. The addition of this chemical mark to RNA molecules regulates gene expression by affecting the fate of the RNA molecules. This posttranscriptional RNA modification is reversible and regulated by methyltransferase “writers” and demethylase “erasers”. The fate of m6A-modified RNAs depends on the function of different “readers” that recognize and bind to them. Research on m6A methylation modification has recently increased due to its important role in regulating cancer progression. Noncoding RNAs (ncRNAs) are a class of RNA molecules that are transcribed from the genome but whose roles have been overlooked due to their lack of well-defined potential for translation into proteins or peptides. However, this misconception has now been completely overturned. ncRNAs regulate various diseases, especially tumors, and it has been confirmed that they play either tumor-promoting or tumor-suppressing roles in almost all types of tumors. In this review, we discuss the m6A modification of different types of ncRNA and summarize the mechanisms involved. Finally, we discuss the progress of research on clinical treatment and discuss the important significance of the m6A modification of ncRNAs in the clinical treatment of tumors.

Bending Performance of a Jute Fiber and Epoxy Resin Composite Sandwich Structure with a Bi-directional Corrugated Truss Core

Shuguang Li,Yanxia Feng,Jiankun Qin,Shuai Li,Gaoyuan Ye,Yingcheng Hu 한국섬유공학회 2019 Fibers and polymers Vol.20 No.10

In this study, a bi-directional corrugated lattice sandwich structure was fabricated from jute fibers and epoxy resin. Die casting was used to prepare the core struts and face sheets and two fiber composites were designed to produce structuralstruts. The configuration and the relative density of the core layer were altered. In addition, the three-point bending propertiesof each configuration were investigated to explore the various modes of failure, destruction processes, and mechanicalproperties. Results of the experiments show that failure mainly occurs via three modes: face sheet crushing, face sheetwrinkling, and core member crushing. Moreover, the failure mode is related to the strength of the core struts. Theoreticalcalculations and finite element analysis were carried out, and the simulation results were in good agreement withexperimental results, the relative errors of displacement and load are all within 20 %. In conclusion, the proposed sandwichbeam configuration composed of jute fibers could be highly useful for enhancing engineering structurer owing to the simplefabrication process, moreover, the materials are environmentally friendly and inexpensive.

Mesoporous silica with monodispersed pores synthesized from the controlled self-assembly of silica nanoparticles

Min Su,Hongjiu Su,Baolei Du,Xiaotong Li,Gaoyuan Ren,Shudong Wang 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.5

Silica nanoparticles with different sizes (ranging from 10 nm to 104 nm) and size distributions were synthesized by semi-batch and semi-batch/batch methods of the Stöber process. Then the amorphous silica with different surface areas (ranging from 30m2/g to 400m2/g) and pores (ranging from 3 nm to 33 nm) were obtained by various aging treatments and drying methods of the synthesized colloidal silica sol. The aging treatment resulted in the monodispersed pore distribution and decreased BET surface area of silica. The high-humidity drying method led to the mesoporous silica with uniform pores and decreased small pores. As the silica was obtained by the arrangement of silica nanoparticles, the pore diameter and pore distribution of mesoporous silica were directly related to the size and distribution of nanoparticles. Furthermore, this study offered a new thought for the synthesis of other mesoporous materials with uniform pore distributions.