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RISS 인기검색어
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- 저자 : Xiaoli Ren (검색결과 5 건)
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Rapid and massive throughput analysis of a constant volume high-pressure gas injection system
Xiaoli Ren,Jia Zhai,Jihong Wang,Ge Ren 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.3
Fusion power shutdown system (FPSS) is a safety system to stop plasma in case of accidents or incidents. The gas injection system for the FPSS presented in this work is designed to research the flow developmentin a closed system. As the efficiency of the system is a crucial property, plenty of experiments areexecuted to get optimum parameters. In this system, the flow is driven by the pressure difference betweena gas storage tank and a vacuum vessel with a source pressure. The idea is based on a constantvolume system without extra source gases to guarantee rapid response and high throughput. Amongthem, valves and gas species are studied because their properties could influence the velocity of the fluidfield. Then source pressures and volumes are emphasized to investigate the volume flow rate of theinjection. The source pressure has a considerable effect on the injected volume. From the data, properparameters are extracted to achieve the best performance of the FPSS. Finally, experimental results areused as a quantitative benchmark for simulations which can add our understanding of the inner gas flowin the pipeline. In generally, there is a good consistency and the obtained correlations will be applied infurther study and design for the FPSS
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Finite element simulation and experiments on a new induction heating bearing replacer
Li Guofa,Ren Xiaoli,Wang Longshan,Zhang Donglin 대한기계학회 2011 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.25 No.8
A new shaft-bearing replacer used for bearing inner race based on the induction-heating technique by finite element method (FEM)was designed in this paper. The regularities of the distribution of the electromagnetic and thermal-structural coupled field in the replacer,temperature changes with time course, and expansion size in shaft and the bearing inner ring were simulated during the course of induction heating. The FEM simulation results not only proved the existence of the eddy skin effect, but also achieved the design parameters of the replacer. Experiments verified that the replacer can realize a fast disassembling of the bearing inner race, which assembled on an axle with interference fits.
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Lei Li,Jie Yang,Xiaojiang Li,Xiaoli Wang,Yanxin Ren,Jimin Fei,Yan Xi,Ruimei Sun,Jing Ma 대한이비인후과학회 2016 Clinical and Experimental Otorhinolaryngology Vol.9 No.3
Objectives. The aim of this study was to investigate the feasibility and safety of percutaneous 125I seed permanent implantation for advanced hypopharyngeal carcinoma from toxicity, tumor response, and short-term outcome. Methods. 125I seeds implant procedures were performed under computed tomography for 34 patients with advanced hypopharyngeal carcinoma. We observed the local control rate, overall survival, and acute or late toxicity rate. Results. In the 34 patients (stage III, n=6; stage IV, n=28), the sites of origin were pyriform sinus (n=29) and postcricoid area (n=5). All patients also received one to four cycles of chemotherapy after seed implantation. The post-plan showed that the actuarial D90 of 125I seeds ranged from 90 to 158 Gy (median, 127 Gy). The mean follow-up was 12.3 months (range, 3.4 to 43.2 months). The local control was 2.1–31.0 months with a median of 17.7 months (95% confidence interval [CI], 13.4 to 22.0 months). The 1-, 2-, and 3-year local controls were 65.3%, 28.6%, and 9.5% respectively. Twelve patients (35%) died of local recurrence, fourteen patients (41%) died of distant metastases, and three patients (9%) died of recurrence and metastases at the same time. Five patients (15%) still survived to follow-up. At the time of analysis, the median survival time was 12.5 months (95% CI, 9.5 to 15.4 months). The 1-, 2-, and 3-year overall survival rates were 55.2%, 20.3%, and 10.9%, respectively. Five patients (15%) experienced grade 3 toxic events and nine patients (26%) have experienced grade 2 toxic events. Conclusion. This review shows relatively low toxicity for interstitial 125I seed implantation in the patients with advanced stage hypopharyngeal cancer. The high local control results suggest that 125I seed brachytherapy implant as a salvage or palliative treatment for advanced hypopharyngeal carcinoma merit further investigation.
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Comparison of the Nutritional Composition of Bullfrog Meat from Different Parts of the Animal
Yanli Zhu,Min Bao,Chong Chen,Xiaoli Yang,Wenliang Yan,Fazheng Ren,Pengjie Wang,Pengcheng Wen 한국축산식품학회 2021 한국축산식품학회지 Vol.41 No.6
The objective of this study was to evaluate the nutritional content of bullfrog meat from different parts of the animal, including fore-chest, thigh and calf. Bullfrog meat was found to be a rich source of proteins, essential amino acids and minerals, but with a low fat content, compared with other aquatic meat products. There was no significant difference (p>0.05) between thigh and calf in mineral content (K, P, Na, Mg, Ca, Zn, Fe, Cu, and Mn), but the contents of K, P, and Mg were higher in thigh and calf than in the fore-chest (p<0.05). The salt-soluble, water-soluble and insoluble protein bands in sodium dodecyl sulphate-polyacrylamide gel electrophoresis (SDS-PAGE) electrophoresis, from fore-chest, thigh and calf were similar, with the most abundant bands being 35 kDa (salt-soluble protein), 35-48 kDa (water-soluble protein) and 48 kDa (insoluble protein). The results showed that the insoluble protein content in the fore-chest meat was higher than that in the thigh meat and calf meat, but the salt-soluble protein fraction was the most abundant in thigh meat. These results showed that the nutrients in different parts of bullfrog meat were different.
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Design and Control of Bi-directional DC/DC converter for 30kW fuel cell power system
Xiao Li,Wenping Zhang,Haijin Li,Ren Xie,Dehong Xu 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
Fuel cell (FC) power system is considered as an alternative energy power generation system in the future. This paper studies the bidirectional DC/DC converter for a 30㎾ three-phase fuel cell power system. The FC power system is sensitive to load characteristics in stand-alone mode, because rapid change or unbalance of the three-phase load will endanger the safety and expectancy of fuel cell. The bidirectional DC/DC converter with energy storage component is used to provide the dynamic power to avoid fast changing in fuel cell output. In addition, it acts as DC bus capacitors to absorb the low frequency current ripple. Therefore, fuel cell is separated from the low frequency current ripple and large DC bus electrolytic capacitors can be eliminated. Through investigating topology of the bidirectional DC/DC converter, three-level bidirectional DC/DC converter (TLBD) is used for the 30㎾ fuel cell power system. The design and control of the TL-DB is described. TL-DB with its control strategy is verified by the experimental results.
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