http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Liangxing Li (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
An experimental study on two-phase fl ow resistances and interfacial drag in packed porous beds
Liangxing Li,Kailin Wang,Shuangbao Zhang,Xianliang Lei 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.6
Motivated by reducing the uncertainties in quantification of debris bed coolability, this paper reports anexperimental study on two-phase flow resistances and interfacial drag in packed porous beds. The experimentsare performed on the DEBECO-LT (DEbris BEd COolability-Low Temperature) test facilitywhich is constructed to investigate the adiabatic single and two phase flow in porous beds. The pressuredrops are measured when air-water two phase flow passes through the porous beds packed withdifferent size particles, and the effects of interfacial drag are studied especially. The results show that, fortwo phase flow through the beds packed with small size particles such as 1.5 mm and 2 mm spheres, thecontribution of interfacial drag to the pressure drops is weak and ignorable, while the significant effectsare conducted on the pressure drops of the beds with bigger size particles like 3 mm and 6 mm spheres,where the interfacial drag in beds with larger particles will result in a descent-ascent tendency in thepressure drop curves along with the fluid velocity, and the effect of interfacial drag should be consideredin the debris coolability analysis models for beds with bigger size particles.
-
Pressure drop in packed beds with horizontally or vertically stratified structure
Li, Liangxing,Xie, Wei,Zhang, Zhengzheng,Zhang, Shuanglei Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.11
The paper concentrates on an experimental study of the pressure drop in double-layered packed beds formed by glass spheres, having the configuration of horizontal and vertical stratification. Both single-phase and two-phase flow tests are performed. The pressure drop during the test is recorded and the measured data are compared with those of homogeneous beds consisting of mono-size particles. The results show that for the horizontally stratified bed with fine particles atop coarse particles, the pressure drop in top layer is found higher than those of homogenous bed consisting of the same smaller size particles, while the measured pressure drop of bottom part is similar with those of similar homogenous bed. But for the homologous bed with upside-down structure, the stratification has little or no effect on the pressure drop of the horizontally stratified bed, and the pressure drop of each layer is almost same as that of homogeneous bed packed with corresponding spheres. Additionally, in vertically stratified bed, the pressure drops on the left and right side is almost equal and between those in homogeneous beds. It is speculated that vertically stratified structure may lead to lateral flow which redistributes the flow rate in different parts of packed bed.
-
Chen Chun,Liu ShengPeng,Cao Yijia,Tang Liangxing,Li Yong 대한전기학회 2023 Journal of Electrical Engineering & Technology Vol.18 No.5
Because the distribution networks distribute electric energy to customers, has many equipment, a wide range and complex network structure, various failures are prone to occur. Rapid failure self-healing is the key means to improve the reliability of power supply in distribution network. This paper proposes a method for fast service restoration of out-of-service areas without failures based on peer-to-peer (P2P) communication of intelligent terminals. It uses distributed intelligent terminal units as the algorithm carrier and a P2P communication network composed of loop Ethernet. It can accurately distinguish the normal state and the failure state based on the generalized Kirchhoff Current Law setting and realize the failure location and isolation without the delay setting problem of the three-stage current protection. In order to verify its effectiveness, a 0.4 kV dynamic simulation model was developed, and scenarios including different types of switches and different topologies are established. The experimental results show that, unlike other algorithms, such as building a convex model, then, using various intelligent algorithms to solve it, the proposed method can complete the load transfer more quickly, whether switches are all circuit breakers, or partly circuit breakers and partly load switches. In the former case, service restoration can be completed within 2.4 s, faster than other centralized or distributed methods, even when the failure occurs in the worst point, as is shown in the results of test scenario 1. In addition, in the latter case, service restoration can be achieved at least within 4.2 s.
-
Jing Zhao,Zhandi Wang,Rong Jiao,Qionglian Wan,Lianchun Wang,Liangxing Li,Yali Yang,Shahzad Munir The Korean Society of Ginseng 2024 Journal of Ginseng Research Vol.48 No.2
Background: Plant health is directly related to the change in native microbial diversity and changes in soil health have been implicated as one of the main cause of root rot. However, scarce information is present regarding allelopathic relationship of Panax notoginseng root exudates and pathogenic fungi Fusarium oxysporum in a continuous cropping system. Methods: We analyzed P. notoginseng root exudate in the planting soil for three successive years to determine phenolic acid concentration using GC-MS and HPLC followed by effect on the microbial community assembly. Antioxidant enzymes were checked in the roots to confirm possible resistance in P. notoginseng. Results: Total 29 allelochemicals in the planting soil extract was found with highest concentration (10.54 %) of p-hydroxybenzoic acid. The HPLC showing a year-by-year decrease in p-hydroxybenzoic acid content in soil of different planting years, and an increase in population of F. oxysporum. Moreover, community analysis displayed negative correlation with 2.22 mmol. L<sup>-1</sup> of p-hydroxybenzoic acid correspond to an 18.1 % population of F. oxysporum. Furthermore, in vitro plate assay indicates that medium dose of p-hydroxybenzoic acid (2.5-5 mmol. L<sup>-1</sup>) can stimulate the growth of F. oxysporum colonies and the production of macroconidia, as well as cell wall-degrading enzymes. We found that 2-3 mmol. L<sup>-1</sup> of p-hydroxybenzoic acid significantly increased the population of F. oxysporum. Conclusion: In conclusion, our study suggested that p-hydroxybenzoic acid have negative effect on the root system and modified the rhizosphere microbiome so that the host plant became more susceptible to root rot disease.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
