Stereo-digital image correlation in the behavior investigation of CFRP-steel composite members

Xiao-Yuan He,Yun-Tong Dai,Hai-Tao Wang,Tian-Yuan Ge,Gang Wu,Jian-Xiao Wan,Shuang-Yin Cao,Fu-Jun Yang 국제구조공학회 2017 Steel and Composite Structures, An International J Vol.23 No.6

The application of carbon fiber reinforced polymer (CFRP) in steel structures primarily includes two categories, i.e., the bond-critical application and the contact-critical application. Debonding failure and buckling failure are the main failure modes for these two applications. Conventional electrometric techniques may not provide precise results because of the limitations associated with single-point contact measurements. A nondestructive full-field measurement technique is a valuable alternative to conventional methods. In this study, the digital image correlation (DIC) technique was adopted to investigate the bond behavior and buckling behavior of CFRP-steel composite members. The CFRP-to-steel bonded joint and the CFRPstrengthened square hollow section (SHS) steel column were tested to verify the suitability of the DIC technique. The stereo- DIC technique was utilized to measure continuous deformation. The bond-slip relationship of the CFRP-to-steel interface was derived using the DIC data. Additionally, a multi-camera DIC system consisting of four stereo-DIC subsystems was proposed and applied to the compressive test of CFRP-strengthened SHS steel column. The precise buckling location and CFRP delamination of the CFRP-strengthened SHS steel column were identified. The experimental results confirm that the stereo-DIC technique can provide effective measurements for investigating the behaviors of CFRP-steel composite members.

New Characteristics of Outdoor Advertising Creativity and Design

Yin Xiao-long (사)한국디지털디자인협의회 2006 (사)한국디지털디자인협의회 conference Vol.2006 No.2

Production of vinegar using edible alcohol as feedstock through high efficient biotransformation by acetic acid bacteria

Yin, Xiao-Yan,Zhong, Wu-Kun,Huo, Jiao,Chang, Xu,Yang, Zhong-Hua 한국식품과학회 2018 Food Science and Biotechnology Vol.27 No.2

In this paper, an optimal semi-continuous process for vinegar production from edible alcohol through biotransformation by acetic acid bacteria (AAB) WUST-01 was developed. The optimized medium composition for the starting-up stage was glucose 5.1 g/L, yeast extract 26.2 g/L, and ethanol 11.9 mL/L, and the optimal ethanol for the following semi-continuous stage was 50 mL/L. In the semi-continuous biotransformation process, the optimal withdraw ratio was 50% of working volume with 12 h cycle time. With these conditions, the total acidity could reach to 77.3 g/L and the acidity productivity could reach to 3.0 g/(L h) in a 5 L reactor. Furthermore, it was investigated to strengthen vinegar synthesis through enhancing alcohol dehydrogenase and aldehyde dehydrogenase activity in AAB by ferrous ion and pueraria flower extract as the enzyme regulators. With these regulators, the vinegar synthesis efficiency can be improved 16.3 and 13.2% respectively.

The New Trend of Graphic Design

Xiao-long Yin 한국디자인지식학회 2006 디자인지식저널 Vol.2 No.-

Degrees of Freedom for Complex MIMO Multiple-Way Relay Channel

Xiao Chen,Yan Zhu,Xinxing Yin,Fangbiao Li,Zhi Xue 보안공학연구지원센터 2014 International Journal of Multimedia and Ubiquitous Vol.9 No.11

The amount of diversity or the number of degrees of freedom (DOF) can be increased by multiple antennas in wireless communication systems. In this paper, we study the DOF of multiple-input multiple-output (MIMO) multiple-way relay channel. There are two groups of source nodes and several one relay node which are equipped with multiple antennas in this kind of channel. Each source node in one group exchanges independent message with the source node in the other group via the relay node. We first show the upper bound on the total DOF for this channel. Then we extend it to the complex MIMO multiple-way relay channel and present the corresponding upped bound.

Numerical investigation of heat transfer enhancement in a channel with periodically oblique plates

Yin Xiao Zhan(잔인샤오),Tae Seon Park(박태선) 대한기계학회 2011 대한기계학회 춘추학술대회 Vol.2011 No.10

Heat transfer enhancement and the self-oscillatory behavior of the flow in a channel with periodic oblique plates are studied numerically. The length and the tilt angle of oblique plate are changed to investigate the heat transfer and flow evolution. The computational results show the characteristics of flow and heat transfer for different lengths and tilt angles of the plate. The object of this study are expected to lead to guidelines that will allow the selected oblique plate geometry configuration for designing heat exchanger which increase thermal performance.

On Art and Design

Xiao-Long Yin 한국디자인지식학회 2006 한국디자인지식학회 Conference Vol.2006 No.2

The Development of Questionnaire on the Motivation of College Students` participation in Tennis

( Xiao Chuan Yin ),( Ke Li ) 한국체육학회 2015 국제스포츠과학 학술대회 Vol.2015 No.1

Purpose: As the world`s second largest professional sports, tennis is played by quite many people around the world including college students. And as the main group playing the tennis, college student plays an important role in popularizing tennis, and could be the pioneer of developing Chinese mass tennis. This research is aiming at developing the Questionnaire on the Motivation of College Students` Participation in Tennis, so that the reason why college students play tennis could be measured more precisely. To be further, the motivation of college students in Beijing will be measured so as to know more about the reason why college students play tennis. Thus, suggestions could be offered to bring more and more college student to play tennis as well as to make the one who is already take part in the sport get much more fun to be willing to take part in sports lifelong. Method: The Questionnaire on the Motivation of College Students` Participation in Tennis is developed based on literature and interview. 240 college students were tested. T-test、exploratory factor analysis (EFA) and correlation analysis was used to test the validity and reliability. Result: Five factors were got after common factor analysis, and there are significant correlations between the factors(0.379~0.678, p<0.01 ). Also there are significant correlations between the factors and the total points (0.625~0.857, p<0.01 ). The questionnaire`s Cronbach αof the population is 0.936. The Cronbach αof the factors is above 0.800. The split-half reliability of the motivation of undergraduate about tennis sport is 0.889. All the split-half reliability among the factors is above 0.800. Conclusion: Firstly, The Questionnaire on the Motivation of College Students` Participation in Tennis includes five factors and 29 items. The five factors are: enjoyment, external influence, learning, emotional experience and value expression. Secondly, With high reliability and validity, the Questionnaire on the Motivation of College Students` Participation in Tennis can be used to measure the motivation of college students` participation in tennis. Thirdly, There are significant differences between the gender and grades on external influence, learning and emotional experience but no on the enjoyment. Significant differences also showed between the different majors on value expression.

Theoretical Analysis and Optimization of Extrinsic Fabry-Perot Interferometer Optical-fiber Humidity-sensor Structures

Xiao Lei Yin,Ning Wang,Xiao Dan Yu,Yu Hao Li,Bo Zhang,Dai Lin Li 한국광학회 2021 Current Optics and Photonics Vol.5 No.6

The theoretical analysis and optimization of extrinsic Fabry-Perot interferometer (EFPI) opticalfiber humidity sensors are deeply investigated. For a typical dual-cavity structure composed of an optical fiber and a humidity-sensitive membrane (HSM), the changes in refractive index (RI) and initial length are discussed for polymer materials and porous oxide materials when relative humidity (RH) increases. The typical interference spectrum is simulated at different RH using MATLAB. The spectral change caused by changing HSM RI and initial length are simulated simutineously, showing different influences on humidity response. To deeply investigate the influence on RH sensitivity, the typical response sensitivity curves for different HSM lengths and air-cavity lengths are simulated. The results show that the HSM is the vital factor. Short HSM length can improve the sensitivity, but for HSM RI and length the influences on sensitivity are opposite, because of the opposite spectral-shift trend. Deep discussion and an optimization method are provided to solve this problem. According to analysis, an opaque HSM is helpful to improve sensitivity. Furthermore, if using an opaque HSM, a short air cavity and long HSM length can improve the sensor’s sensitivity These results provide deep understanding and some ideas for designing and optimizing highly sensitive EFPI fiber humidity sensors.

Consumption Motivations for Counterfeit Luxury Brands: Moderating Role of Genuine Brand Experience

Xiao-Long Yin,Yan-Li Yang,Hyung-Jun Kim 한국무역연구원 2021 무역연구 Vol.17 No.5

Purpose - In the Chinese market, increasing numbers of luxury brands are overwhelmed by counterfeits, and the continued success of counterfeits has become a considerable problem. Therefore, this research is to understand the purchase motivations for the counterfeits in the Chinese millennial generation, who are the main force of Chinese luxury brand market and counterfeits market. Design/Methodology/Approach - The data comes from a questionnaire survey from Chinese millennials (N= 391). This study uses the regression analysis and moderation effect model to verify causal relations or compare the difference in particular circumstances. Findings - Among the 8 variables, only 5 motivation factors influence purchase intention of counterfeits. The moderating effect of perceived risk was significant only when Mianzi influences the purchase intention of counterfeits. Millennials without experience in genuine brand more tend to buy counterfeits when they are motivated by conspicuous, Mianzi, and materialism reasons. Conversely, consumers with experience are more likely to buy counterfeits mainly when materialism, bandwagon, and Mianzi motivations become important. Notably, men also purchased counterfeits because of Mianzi or self-gift giving than women, the motivations for buying the counterfeits were more diverse relatively in case of middle-incomers. Research Implications - This study introduced the motivations of core consumer psychology factors into the analysis of counterfeits. The results will provide the theoretical basis for global luxury brand managers facing the Chinese market when formulating sustainable development strategies.