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Flexural performance of fire damaged and rehabilitated two span reinforced concrete slabs and beams
Yu, Jiang-Tao,Liu, Yuan,Lu, Zhou-Dao,Xiang, Kai Techno-Press 2012 Structural Engineering and Mechanics, An Int'l Jou Vol.42 No.6
Five two-span reinforced concrete (RC) slabs and seven two-span RC beams were tested under the ISO 834 standard fire with different durations. CFRP strengthening was then applied to some of the specimens after the damaged concrete was removed from the specimens and replaced with polymer mortar. All the specimens were loaded to failure to investigate the influence of fire-damage and the effectiveness of strengthening methods. Test results indicated that the flexural capacities of specimens decrease with the fire duration increases. Moreover, fire exposure had more significant effect on the flexural rigidity than on the bearing capacity of the specimens. After rehabilitation, the bearing capacities of specimens reached or even exceeded that of the reference RC specimen, and the strengthening methods seemed to have limited effect on flexural rigidity recovery. From the analysis of moment redistribution of tested beams, elevated temperature is found having different impacts on sagging moment region and hogging moment region. The damage of RC continuous member is definitely a comprehensive response of different regions.
Effects of Influencing Factors on a Lab-Scale Device for Dynamic Scaling Mitigation
Tao Yu,Ying Wang,Jiayu Song,Baichun Wu,Xin Zhang,Chengtun Qu 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.6
To investigate the dynamic scaling properties of produced water from oil and gas fields, in this study, an experimental dynamic scaling mitigation device consisting of a filler cylinder, a sewage circulation device, and a heating device was designed. The effects of important factors, namely, initial concentration of scale-forming ions, contact time, temperature, and flow rate, on the dynamic scaling process were investigated using this device. The results obtained showed that the rate of scale adsorption on cotton fiber decreased gradually as the initial concentration of the scale-forming ions increased, and the scale adsorption rate peaked at 97.5% when the contact time was between 2 and 8 h. It was also observed that the maximum scale adsorption rate and amount corresponded to experimental temperatures of 50 and 40°C, respectively. Furthermore, the maximum scale adsorption rate was 94% at a flow rate of 60 L/h, while the scale adsorption amount peaked at a flow rate of 100 L/h. These results provide important guidelines for the establishment of a rapid measurement method for dynamic scaling in produced water from oil and gas fields and for the evaluation of water quality stability for water flooding extraction.
Reliability Analysis and Prediction for Product Design Based on Feature Similarity
Tao Yang,Yu Yang,Yao Jiao 보안공학연구지원센터 2014 International Journal of Database Theory and Appli Vol.7 No.5
During product design phase, aiming at the problem of lacking reliability data, lower of product reliability, feature similarity-based new product design reliability analysis and prediction model were proposed. Putting the new product features as an evaluation objectives, an approach named Technique for Order Preference by Similarity to Ideal Solution(TOPSIS) was established firstly for selecting similar features products; Then, in order to realize the reliability analysis relational mapping with the new product design, the failure structure of the similar features products was quantified and the product failure structure matrix (FSM) was established, respectively; Afterwards, the Group Decision Making Method (GDMM) was presented for determining the improvement factor of the similar features products failure causes, on that basis, the new product features failure structure was generated to predict the reliability of new designing products. Finally, feasibility and effectiveness of the model were verified through an example of new Smart Mobile Phone product design.
Tao Yu,Yanyan Yang,곽이성,송관규,김미연,이만휘,조재열 고려인삼학회 2017 Journal of Ginseng Research Vol.41 No.2
Background: Ginsenoside Rc (G-Rc) is one of the major protopanaxadiol-type saponins isolated from Panax ginseng, a well-known medicinal herb with many beneficial properties including anticancer, antiinflammatory, antiobesity, and antidiabetic effects. In this study, we investigated the effects of G-Rc on inflammatory responses in vitro and examined the mechanisms of these effects. Methods: The in vitro inflammation system used lipopolysaccharide-treated macrophages, tumor necrosis factor-a/interferon-g-treated synovial cells, and HEK293 cells transfected with various inducers of inflammation. Results: G-Rc significantly inhibited the expression of macrophage-derived cytokines, such as tumor necrosis factor-a and interleukin-1b. G-Rc also markedly suppressed the activation of TANK-binding kinase 1/IkB kinase ε/interferon regulatory factor-3 and p38/ATF-2 signaling in activated RAW264.7 macrophages, human synovial cells, and HEK293 cells. Conclusion: G-Rc exerts its anti-inflammatory actions by suppressing TANK-binding kinase 1/IkB kinase ε/interferon regulatory factor-3 and p38/ATF-2 signaling.
Tao, Hui,Guo, Feng,Tu, Yan,Si, Bing-Wen,Xing, Yu-Chuan,Huang, De-Jun,Diao, Qi-Yu Asian Australasian Association of Animal Productio 2018 Animal Bioscience Vol.31 No.6
Objective: The objective of this study was to determine the effect of weaning age on intake, performance, nutrition metabolism and serum parameters of beef calves. Methods: Sixty Droughtmaster crossbred calves were assigned to 5 groups with 12 calves in each group. The calves in control group remained with the dams till the 22-week age, while the calves weaned at 28 d (4 wk), 42 d (6 wk), 56 d (8 wk), and 70 d (10 wk) of age were sent to group 4 wk, group 6 wk, group 8 wk, and group 10 wk, respectively, and then were fed on milk replacer till the 22-week age. Feed intake and body weight and size were record and blood metabolites were measured. And 24 calves of them (6 in each group) were picked randomly for digestion and metabolism trail. Feed, feces and urine sample were taken and measured. Results: Dry matter intake of calves in group 4 wk was significantly lower than those in the remaining groups from wk 17 to 22 (p<0.05). Feed efficiency of the calves was higher in groups 4 wk and 6 wk than those in groups 8 wk and 10 wk from 11 to 13 wk (p<0.05), and calves had higher feed efficiency in group 4 wk, group 6 wk, and group 8 wk than those in group 10 wk from wk 14 to wk 22. Calves in group 4 wk and 6 wk had lower body weight than group 8 wk and group 10 wk and control group at 10-week age (p<0.05) and 13-week age (p<0.05), and calves in group 6 wk had no significant difference in body weight with control group, group 8 wk and 10 wk (p>0.05) but was higher than that of group 4 wk (p<0.05). Calves in group 6 wk had higher final body weight and total gain than group 4 wk, but no difference of total gain with that of groups 8 wk, 10 wk, and control group. And weaning calves at 6-week age brought higher feed efficiency and average daily gain from wk 14 to wk 22, and higher dry matter and organic matter digestibility at 21 wk. Conclusion: It is concluded that the weaning of calves at 6 weeks of age gave positive results.
Yu, Ting-Ting,Han, Zhi-Gang,Shan, Li,Tao, Jie,Zhang, Tao,Yuan, Shuai-Fei,Shen, Hong-Li Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.1
Background and Objective: Lung cancer is one of the malignant diseases which most seriously threat humansurvival and development. This study aimed to assess osteopontin (OPN) expression in non-small cell lung cancer (NSCLC) and any relationship with clinicopathological features. Methods: Immunohistochemistry was used to determine OPN expression and microvascular density (MVD) in 120 cases of NSCLC also undergoing clinical assessment. Results: Moderately positive expression of OPN was found in 34.6% (41/120) and strong expression in 47.5% (57/120) of the NSCLCs; OPN expression in carcinomas was higher than in pericarcinoma tissues (P<0.05). While no obvious association was observed with NSCLC patient age, gender, maximum diameter of the tumor and pathological type, OPN expression was more commonly detected in poorly differentiated carcinoma tissue and lymph node metastasis as well as at advanced clinical stage (P<0.05); OPN expression in cancer tissue was positively correlated with MVD (r = 0.839, P = 0.000). Conclusion: OPN plays an important role in promoting tumor angiogenesis and progress of NSCLCs and has the possibility to become the new target for therapy.
BLDC Motor Control System using ASK DC-link PLC Technology
Tao Yu,Sung-Geun Song,Se-Min Kim,Kwang-Heon Kim,Sung-Jun Park 한국조명·전기설비학회 2009 조명·전기설비학회논문지 Vol.23 No.3
Power line communication or power line canier (PLC) is a system for carrying data on a conductor and can also used for electric power transmission. Now the powers used in the motor drive system are mostly DC sources. Even AC powers in some systems are generated from DC sources by the inverter. It is can be forecasted that the DC-link PLC technology will be widely used in various industrial fields. In this paper a novel BLDC motor control system using ASK DC-link PLC technology is proposed. The characteristic of this system is that the communication only needs 2 DC lines and there are no additional lines to translate the reference signals. The number of signal cables can be minimized when the DC-link PLC method is applied in the multi motor control system and the slip ring design also be simplified when this method is applied in rotation machines. The proposed motor control system is clarified by the PSIM and MATLAB simulations and tested through the hardware prototype.