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Sheng-yuan Fan,Zhan-ping Song,Yu-wei Zhang,Nai-fei Liu 대한토목학회 2020 KSCE JOURNAL OF CIVIL ENGINEERING Vol.24 No.5
It is a common type of tunnel under-cross the roadbed slope with weak inter-layer. Rainfall infiltration will cause soil softening, matric suction and strength reduction, which seriously threaten the safety of slope and tunnel. This paper presents a case where a tunnel underlying the roadbed slope with weak inter-layer in Guiyang 1# line, China. The seepage calculation model in MIDAS GTS/NX software, considering hydraulic permeability coefficient characteristiccurve and soil-water characteristic curve, was used to analyze the stress and deformation of the roadbed slope and tunnel. The results reveal that rainfall infiltration has great influence on the deformation of roadbed slope with weak inter-layer and the force of internal tunnel. Slope displacement increases rapidly in the early stage and decreases in the late stage, but the absolute value of displacement increases continuously and the slope safety factor decreases gradually, which makes the slope in a dangerous state. The force of tunnel lining increases in the early stage and decreases with the recovery of soil strength after rainfall. The control effects of anchor cable and anti-slide pile reinforcement on slope sliding and tunnel stress were studied. And the anchor cable reinforcement measure is more effective on reducing slope slip and tunnel lining structure internal force.
Sheng Yuan,Xuemei Liu,Xin Zhou,Zhongyang Li 한국광학회 2016 Current Optics and Photonics Vol.20 No.4
For the application of multiusers, the arrangement and distribution of the keys is a much concerningproblem in a cryptosystem. In this paper, we propose an optical encryption scheme with multiple usersbased on computational ghost imaging (CGI) and orthogonal modulation. The CGI encrypts the secret imageinto an intensity vector rather than a complex-valued matrix. This will bring convenience for post-processingand transmission of the ciphertext. The orthogonal vectors are taken as the address codes to distinguishusers and avoid cross-talk. Only the decryption key and the address code owned by an authorized userare matched, the secret image belonging to him/her could be extracted from the ciphertext. Therefore, thereare two security levels in the encryption scheme. The feasibility and property are verified by numericalsimulations.
Simple denoising method for novel speckle-shifting ghost imaging with connected-region labeling
Sheng Yuan,Xuemei Liu,Pibin Bing 한국광학회 2019 Current Optics and Photonics Vol.3 No.3
A novel speckle-shifting ghost imaging (SSGI) technique is proposed in this paper. This method can effectively extract the edge of an unknown object without achieving its clear ghost image beforehand. However, owing to the imaging mechanism of SSGI, the imaging result generally contains serious noise. To solve the problem, we further propose a simple and effective method to remove noise from the speckle-shifting ghost image with a connected-region labeling (CRL) algorithm. In this method, two ghost images of an object are first generated according to SSGI. A threshold and the CRL are then used to remove noise from the imaging results in turn. This method can retrieve a high-quality image of an object with fewer measurements. Numerical simulations are carried out to verify the feasibility and effectiveness.
Sheng Yuan,Meijian Liu,Ziming Zhao 한국유전학회 2020 Genes & Genomics Vol.42 No.11
Background The spiny eel (Sinobdella sinensis) is a small subtropical fish endemic to China, Vietnam, and Laos. It hasdisappeared in many rivers and lakes due to anthropogenic stressors. Objective The aim of this study was to investigate the genetic diversity and population structure and to provide pertinentinformation of the evolutionary history and conservation of S. sinensis. Methods Mitochondrial DNA (mtDNA) cytochrome c oxidase I (COI) sequences of 144 individuals from five lakes in theJiangsu Province of Eastern China were sequenced. Results A total of 17 haplotypes were defined by 20 variable nucleotide sites. Remarkably low haplotype and nucleotidediversity was observed in all sampled populations. The AMOVA analyses revealed that 96.44% of the genetic variationoccurred within the populations. Significant genetic differentiation was detected among populations (P < 0.05), but nolarge-scale regional differences were detected. Analysis of neutral evolution and mismatch distribution suggests populationexpansion. Low genetic diversity and shallow population structure based on COI sequences were also confirmed. Conclusions The wild resource of S. sinensis in Eastern China has sharply declined. Low genetic diversity and shallowpopulation structure based on COI sequences were confirmed. Fishing management and resource conservation of this speciesshould be taken urgently.
Formation of Vortices in a Three-dimensional Dipolar Bose-Einstein Condensate
Yuan Sheng Wang,Shen Tong Ji,Yue E Luo,Zhen Yu Li 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.67 No.9
We investigate the vortex formation properties of a three-dimensional (3D) dipolar Bose-Einstein condensate (BEC) of 52Cr atoms in an optical lattice potential through numerical simulations of the time-dependent Gross-Pitaevskii equation with a dissipation term. The mechanisms that influence the dipole-dipole interaction and the repulsive contact interaction between atoms during vortex formation are analyzed. We find that the stability of the vortices weakens with increasing attractive dipolar strength and that the repulsive contact interaction between atoms can increase the number of vortices.
Yuan, Sheng-Guang,Liao, Wei-Jia,Yang, Jian-Jun,Huang, Guo-Jin,Huang, Zhao-Quan Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.24
Background: This study was conducted to determine DEPDC1 expression in hepatocelluar carcinomas (HCCs) and to reveal its potential role in diagnosis and prognosis of affected patients. Materials and Methods: DEPDC1 expression at the mRNA level was detected by quantitative real-time PCR (qRT-PCR) in 205 cases of HCC and paired adjacent normal liver tissues, and by semi-quantitative RT-PCR in 20 cases. Survival curves were obtained by using Kaplan-Meier method and Log-rank test. Independent predictors associated with regard to disease free survival (DFS) and overall survival (OS) were identified using the Cox proportional hazard model. Results: High DEPDC1 mRNA levels were detected in 144 out of 205 cases (70.24%) of HCC, significantly associated with clinicopathological parameters, including tumor size (${\geq}4cm$), alpha-fetoprotein (${\geq}100ng/ml$), B-C of BCLC stage and recurrence. Kaplan-Meier survival analysis revealed that HCC patients with high DEPDC1 expression had poor OS and DFS. Multivariate analysis demonstrated that high DEPDC1 expression was an independent predictor for OS (HR=1.651; 95% 95%CI, 1.041-2.617; p=0.033) and DFS (HR=1.583; 95%CI, 1.01-2.483; p=0.045). Conclusions: Our results indicate DEPDC1 might be a novel diagnostic marker and an independent prognostic predictor for HCC patients.
온라인 환경에 알리페이 얼굴인식 결제서비스의 이용의도에 관한 연구 : 기술수용모델과 체험경제이론 중심으로
YU DENG SHENG,ZHANG YUAN YUAN,임규건 한국IT서비스학회 2020 한국IT서비스학회 학술대회 논문집 Vol.2020 No.-
4차 산업혁명 시대에 첨단적인 기술을 기반으로 소비자의 소비 형태를 빠르게 변화되고 있다. 이제는 지갑 및 스마트폰 없이 얼굴인식으로 결제가 가능한 시대가 다가온다. 얼굴인식 결제서비스는 안면인식 기술을 이용한 혁신적인 결제방식으로 빠른 속도로 부상하고 있다. 생체인증 기술을 이용한 간편 결제서비스의 편의성이 외에도 기존의 패스워드 입력과 같은 방식을 대체할 수 있는 효율적인 수단으로 인정을 받는다. 본 연구는 기술수용모델과 체험경제이론을 기반으로 알리페이 얼굴인식 결제서비스의 이용태도와 이용의도에 어떠한 영향을 미치는지에 탐색하고자 한다. 또한, 인구사회학특징에 따라 얼굴인식 결제서비스의 이용의도에 통계학적으로 유의미한 차이가 있는지에 살펴보고자 한다. 본 연구의 결과를 바탕으로 향후 알리페이 얼굴인식 결제서비스의 혁신적인 디자인 및 기능의 구축 시 근거자료가 될 수 있길 기대된다. 또한, 알리페이 얼굴인식 결제서비스의 활성화 방안을 모색하기 위해 실무적 시사점을 제시하도록 기대된다.