Mechanical flower

( Yuxuan Li ) 한국기초조형학회 2018 한국기초조형학회 작품집 Vol.2018 No.1

A Study of Leveraging Memory Level Parallelism for DRAM System on Multi-Core Architecture

Yuxuan Wang,Yingping Zhang,Xiaotian Zhang,Jian Yin,Licheng Chen 보안공학연구지원센터 2016 International Journal of Hybrid Information Techno Vol.9 No.4

DRAM system has been more and more critical on modern multi-core architecture where the Moore’s law has been made effect on increasing the number of cores integrated in a processor chip. The performance of DRAM system is usually measured in term of bandwidth and latency, which are regarded as inherently depending on Row Buffer Hit Rate (RBHR) according to previous studies. In this paper, we find that Memory Level Parallelism (MLP) exhibits a stronger correlation with the performance of DRAM system on multi-core/many-core architecture than RBHR, and promoting MLP significantly improves DRAM system performance. In order to exploit the MLP, we have evaluated various approaches including multi-bank, multi-row-buffers, multi-memory-controllers and the obsolete Virtual Channel Memory (VCM). The experimental results show that VCM is a better alternative to traditional DRAM chip on multicore/many-core architecture than the other three approaches because VCM has almost all the advantages of the others: 1) it can improve homogeneous workloads’ IPC by 2.21X on a 16-core system with 32 virtual channels due to leveraging unexploited MLP. 2) It can also promote Quality-of-Service (QoS) of DRAM system by removing unfairness while memory controllers serve memory requests. 3) It can save energy and has low area costs. Unfortunately, VCM, which was proposed in the late 1990s, faded away before multi-core/manycore became dominated. Therefore, we suggest memory chip vendors reconsider the VCM technology for multi-core architecture.

Diagnostic value of supersonic shear impulse elastography for malignant cervical lymph nodes: a Bayesian analysis

Yuxuan Qiu,Zhichao Xing,Qianru Yang,Yan Luo 대한초음파의학회 2022 ULTRASONOGRAPHY Vol.41 No.2

Purpose: This study aimed to assess the diagnostic performance of supersonic impulse (SSI) elastography in differentiating malignant and benign cervical lymph nodes.Methods: The Medline, Embase, and Cochrane Central databases were searched until December 1, 2020. Two different reviewers checked the studies and extracted the data. The diagnostic yields were quantitatively synthesized using a Bayesian bivariate model with an integrated nested Laplace approximation in R.Results: In total, 590 patients with 892 cervical lymph nodes who underwent SSI elastography were included. The total prevalence of malignancy was 33.7% (301/892), and the four elastic modulus values (mean, maximum, minimum, and standard deviation) were significantly different between malignant and benign lymph nodes. For the mean elastic modulus, the summary estimates for sensitivity and specificity were 0.720 (95% credible interval [CrI], 0.592 to 0.824) and 0.877 (95% CrI, 0.727 to 0.969), respectively. The estimated area under the curve (AUC) was 0.845 (95% CrI, 0.672 to 0.914). For the maximum elastic modulus, the sensitivity and specificity were estimated to be 0.809 (95% CrI, 0.698 to 0.899) and 0.816 (95% CrI, 0.643 to 0.924), respectively. The estimated AUC was 0.834 (95% CrI, 0.579 to 0.938). The minimum and standard deviation of the elastic modulus and the outcomes of the positive and negative likelihood ratio, diagnostic odds ratio, and risk difference were also calculated.Conclusion: SSI elastography is an acceptable imaging technique for diagnosing malignant cervical lymph nodes, and it can play a complementary role today. Both maximum and mean elastic modulus values should be taken into consideration to make a clinical judgment.

Causal Relationship between the regional economic growth and the air cargo increase in China

Yuxuan Wang,김태승 피터드러커 소사이어티 2022 창조와 혁신 Vol.15 No.4

The purpose of this paper is to analyze the Granger causal relationship between the increase of air freight and economic growth in China. In particular, this paper tried to check what kind of causality appears depending on the geographical and industrial characteristics of the region, and economic size. For this purpose, this paper collected panel data for 20 years from 2000 to 2019 for 31 provinces in China, which are in total 620 observations. The methodology used for the analysis is the VECM method on each sub-group after going through the normal stationary test and the cointegration test. The conclusions of this paper are as follows. First, China has a bidirectional causal relationship between its economy and air freight at the national level. Second, geographically, a bidirectional causal relationship is shown in the Central region and, economically, in the middle-size region, but in advanced regions such as Bohai bay and Yangtze river, a Granger-causal relationship is shown in the direction from economic growth to air freight increase. This shows that the southeastern provinces of China have already entered the stage of economic maturity. Third, the Pearl River Delta and the Dongbei region show a causal relationship in the direction from air freight to economic growth. This can be said to reflect the geographical characteristics of each region and the level of economic growth in China.

Hometown

Yuxuan Cai 한국콘텐츠학회 2015 ICCC International Digital Design Invitation Exhib Vol.2015 No.5

Multicolored Pride

Yuxuan Cai 한국콘텐츠학회 2012 ICCC International Digital Design Invitation Exhib Vol.8 No.1

Experimental and Numerical Research on Uplift-Restricted and Slip-Permitted Screw-Shaped Connectors

Yuxuan Chen,Quansheng Yan,Xiaolin Yu,Buyu Jia,Yu Wu,Yufan Luo 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1

Improving mechanical performance of the negative moment regions of continuous composite beams is essential for composite beam bridges. Uplift-restricted and slip-permitted (URSP) screw-shaped connectors can enhance the crack resistance of a concrete slab through free slip between the concrete slab and the steel beam. Furthermore, URSP screw-shaped connectors are more adaptable to the requirements of rapid construction than URSP T-shaped connectors. To investigate the slip and mechanical behavior of URSP screw-shaped connectors, nine push-out tests with various parameters were conducted. In these tests, the thickness of the foam sleeve wrapped outside the screw exerted a highly signifi cant eff ect on free slip performance. A refi ned 3D nonlinear fi nite element model with the foam’s constitutive model was established using ABAQUS. The stress mechanism and failure modes of the FE models were analyzed. Lastly, to estimate the slip performance of URSP screw-shaped connectors, an equation with a simple form was proposed via mechanism analysis and a regression method.

Autonomous Alert Generation and Recommendation for Disaster Management

Yuxuan Zhao,Ka Lok Man 한국재활복지공학회 2017 한국재활복지공학회 학술대회논문집 Vol.2017 No.11

Experimental and Mechanical Behavior of Rubber-Sleeved Group Studs

Yuxuan Chen,Quansheng Yan,Buyu Jia,Xiaolin Yu,Yu Wu,Yufan Luo 대한토목학회 2022 KSCE JOURNAL OF CIVIL ENGINEERING Vol.26 No.9

The group studs used in precast steel-concrete composite bridges can reduce the volume of cast-in-place concrete, consequently accelerating the construction process and improving the construction quality. However, the small spacing of the studs in the group studs may result in a decrease in shear strength and ductility, and a nonuniform distribution of shear force at the root of the studs. Hence, rubber-sleeved group studs, whose studs are wrapped by a rubber sleeve at the root, are proposed to redistribute the shear force at the steel–concrete interface and improve the ductility of the shear connector. In this study, four push-out tests were conducted to demonstrate the composite mechanism of rubber-sleeved group studs. Results show that the rubber-sleeved group studs exhibit better ductility than ordinary group studs. Finite element models verified using the test results were also established for parametric analysis. The mechanism analysis shows that the concrete compression regions around stud roots are sufficiently utilized. Based on the parametric analysis, designing suggestions for rubber-sleeved group studs were provided.

論≪大公報≫對輿論環境的建構

Chen Yuxuan,최우석 중국인문학회 2016 中國人文科學 Vol.0 No.63

For Chinese during thousands of years, ‘Civil commotion’ is a social phenomenon ubiquitously. People are at the bottom of the society and have the most direct feelings for their society. Therefore, any changes in the state of things around them will directly influence their lives. In the late Qing Dynasty and early Republic of China, national social crisis aggravate constantly with people living in dire straits, so people are forced to pretend to be lively have to set off wave after the wave of ‘Civil commotion’ climax. The ‘Da Gong Bao’ at that time, as one of influenctial mass media, assumed the true information transfer event. For the people, who are shouting, and guiding public opinion and from the authority of government pressure on social responsibility, this paper contributed to the incident direction of 'good' in a certain extent. In addition, to explore the modern mass media reports on mass incidents as well as the construction of the concept of public opinion for the mass media, public opinion guide will have a certain significance. This paper demonstrates articles from ‘Da Gong Bao’ between 1909-1911 about ‘Civil commotion' reports as research samples, which are chosen from the perspective of 'agenda setting' to analyze the ‘Da Gong Bao’ of public opinion environment construction process. The results show that the ‘Da Gong Bao’, assuming the government supervision and the basis of liability of the information transmission by setting the news frame ‘Civil commotion' in order to impact newspaper readers, prompted the government to reform. However, due to the limitations of the times and the newspaper itself, this newspaper reported in the structure construction of 'constitutional monarchy media framework’ and social reality have certain discrepancy.