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
오늘 본 자료
-
Determining suitable observation times for testing odor preferences of a parasitoid wasp^ Cotesia kariyai^ using a four‐arm olfactometer
-
자동차 감성평가와 품질설계
-
The influence of hospital antimicrobial use on carbapenem-non-susceptible Enterobacterales incidence rates according to their mechanism of resistance: a time-series analysis
-
Protein production: plant^ profit^ plus people?
-
Long-Term Psychological Impact of Carrying a BRCA1/2 Mutation and Prophylactic Surgery: A 5-Year Follow-Up Study
-
Moses Has His Interpreters: Understanding the Legal Exegesis in Acts 15 from the Precedent in Jubilees
- 검색키워드
- 저자 : Shifeng Lu (검색결과 3 건)
- 무료
- 기관 내 무료
- 유료
-
Xie Chang,Zhou Li,Ding Shifeng,Lu Mingfeng,Zhou Xu 대한조선학회 2023 International Journal of Naval Architecture and Oc Vol.15 No.-
Main engine power prediction is important for polar ships operating in brash ice channels, which is one of the most important concerns of shipowners. Self-propulsion simulation is an efficient method to predict the developed power. At present, such models as the discretized propeller model (DPM) and the body force model (BFM) are used for self-propulsion simulation. However, these models are often limited to open water. There is little research on self-propulsion calculations in ice-infested water. This paper presents the BFM to carry out selfpropulsion simulations in a brash ice channel. Research on simulation strategy for open water performance based on the BFM is carried out. Ship–ice–water interactions are simulated using computational fluid dynamicsdiscrete element method (CFD-DEM) coupling method. Both loaded and ballast conditions are considered in the model-scale self-propulsion simulations. Numerical results based on the BFM are compared with the simulation results based on the DPM, as well as model test results. Ship–propeller–ice interactions and propeller suction effects are also compared with photographs taken at an ice tank test. The results show that the differences of the developed power based on the BFM for both loaded and ballast conditions are 8.94% and 15.25%, respectively. The prediction accuracies of the developed power based on the BFM for both loaded and ballast conditions are 1.56% and 7.01%, respectively; lower than those based on the DPM. However, the computation efficiency based on the BFM is 12 times higher than that based on the DPM. To conclude, the proposed BFM could be used as an effective means to calculate the developed power and to evaluate the trend of hull-line optimization at the development stage.
-
Xiuju Du,Xuandong Wang,Yun Chen,Shuyu Tian,Shifeng Lu 한국고분자학회 2018 Macromolecular Research Vol.26 No.6
In our previous work, an acidic homogenous polysaccharide TAPA1 purified from Tremella aurantialba and its acetylated derivative TAPA1-ac, deacetylated derivative TAPA1-deac and sulfated fractions TAPA1-s were obtained by chemical modification and their partially chemical characterization were investigated. In present work, the antioxidant activities of various polysaccharides, including TAPA1, and its three derivative fractions, were determined in terms of scavenging of superoxide anion radicals and hydrogen peroxide (H2O2) by using chemiluminescence measurements, and their activities of oxidative injury rehabilitation were assessed by using PC12 oxidative injury model induced with H2O2. In general, compared with TAPA1, TAPA1-ac showed significant antioxidant activities and higher oxidative injury protection effects, whereas TAPA1-deac and TAPA1-s showed lower effects. These findings seemed to suggest that antioxidant effects and rehabilitation effect of oxidative injury, relate to not only different substituted group, but also the content and the degree of substitution (DS) of acetyl group, indicating that acetylation of TAPA1 was an effective means of enhancing its antioxidant activity and rehabilitation effect.
-
Xiuju Du,Xuandong Wang,Yun Chen,Shuyu Tian,Shifeng Lu 한국고분자학회 2018 Macromolecular Research Vol.25 No.6
In our previous work, an acidic homogenous polysaccharide TAPA1 purified from Tremella aurantialba and its acetylated derivative TAPA1-ac, deacetylated derivative TAPA1-deac and sulfated fractions TAPA1-s were obtained by chemical modification and their partially chemical characterization were investigated. In present work, the antioxidant activities of various polysaccharides, including TAPA1, and its three derivative fractions, were determined in terms of scavenging of superoxide anion radicals and hydrogen peroxide (H2O2) by using chemiluminescence measurements, and their activities of oxidative injury rehabilitation were assessed by using PC12 oxidative injury model induced with H2O2. In general, compared with TAPA1, TAPA1-ac showed significant antioxidant activities and higher oxidative injury protection effects, whereas TAPA1-deac and TAPA1-s showed lower effects. These findings seemed to suggest that antioxidant effects and rehabilitation effect of oxidative injury, relate to not only different substituted group, but also the content and the degree of substitution (DS) of acetyl group, indicating that acetylation of TAPA1 was an effective means of enhancing its antioxidant activity and rehabilitation effect.
ScienceON연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
