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  • Resultat 11-20 av 370
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12.
  • Cai, Xiao, et al. (författare)
  • 高Ka 数下分子扩散效应对氨气/氢气/空气预混火焰结构的影响
  • 2022
  • Ingår i: Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics. - 0253-231X. ; 43:8, s. 2025-2032
  • Tidskriftsartikel (refereegranskat)abstract
    • Simultaneous planar laser induced fluorescence (PLIF) and Rayleigh scattering thermometry (RST) were applied to measure the key species and temperature fields of premixed ammonia/ hydrogen/air jet flames to investigate the effects of differential diffusion on flame structure. NH-PLIF technique was developed to properly characterize the reaction zone of ammonia flames. Three flames with similar laminar combustion characteristics but different Lewis numbers (Le) were investigated. Results show that the reaction zone are locally thickened for all flames at high Karlovitz number (Ka). Furthermore, the reaction layer thickness increases with the Le, indicating that the differential diffusion still plays a role in the turbulent combustion even in the distributed reaction zone regime.
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15.
  • Cao, X., et al. (författare)
  • Comparative studies on annealed proton exchange waveguides in Y-cut MgO : LiNbO3 and Z-cut LiNbO3
  • 2004
  • Ingår i: Wuli xuebao. - : Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences. - 1000-3290. ; 53:11, s. 3786-3793
  • Tidskriftsartikel (refereegranskat)abstract
    • Proton exchange waveguides in MgO:LiNbO.3 and LiNbO.3 crystals were fabricated , and the diffusion coefficients for the proton exchange process are obtained. The evolution characteristics of the waveguide index profile in the annealing process are studied. The structural deformation of the proton exchange waveguides in Mg O:LiNbO.3 and LiNbO.3 and the restoration effect of annealing are also studied tho roughly by the x-ray diffraction method and the OH-infrared absorption method. The optical and structural characteristics of annealed proton exchange waveguides in MgO:LiNbO.3 and LiNbO.3 are analysed and compared with eath other.
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16.
  • Ceccato, Vania, 1968- (författare)
  • Crime in transit environments: Lessons from Stockholm (Sweden) and São Paulo (Brazil) metro systems : 交通环境犯罪:从瑞典斯德哥尔摩和巴西圣保罗地铁系统的经验总结
  • 2018
  • Ingår i: Landscape architecture. - 0023-8031. ; 7
  • Tidskriftsartikel (refereegranskat)abstract
    • 笔者通过评估瑞典斯德哥尔摩和巴西圣保罗地铁系统的犯罪活动及扰乱公共秩序行为案例,探讨相关经 验教训。对比 2 个国家地铁系统的时空犯罪模式及上述案例的研究结果,总结环境对犯罪活动及扰乱公共秩序行为的影响。研究中地理信息系统、田野调查和建模等分析过程应用了相应地铁运营商的基础数据。研究发现 市中心地铁站及终点站往往比其他站点更容易发生犯罪。除了区位因素,地铁站的环境属性、周边环境及社区 环境也会影响站点的犯罪机会。预防犯罪的干预措施必须针对具体犯罪活动、核心地铁站的拥挤情况,特别是 易发生犯罪的高峰时段制定。以此总结今后相关研究方向,并提出相应政策建议。
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  • Chan, Lih Shing, et al. (författare)
  • Sexualized Female Bodies : Gender Implications on the Characterization of Lengmo in Hong Kong Print Media
  • 2012
  • Ingår i: Hong Kong Journal of Social Sciences. - 1021-3619. ; 42:Spring/Summer, s. 83-96
  • Tidskriftsartikel (refereegranskat)abstract
    • In recent years, lengmo has emerged as a popular and controversial subject in Hong Kong society. Literally meaning naïve young model, lengmo is a relatively new occupation that allows young women who lack the figure of professional models to enter the entertainment industry. These young women, mostly in sexy appearance, become a social phenomenon propelled by local print media. This paper analyzes how Hong Kong print media characterize lengmo by endorsing them as sexualized subjects. These characterizations imply the discourse of sexualizing female bodies. Although seemingly pushing the expression of female sexuality into social spaces, they do not liberate women in pursuit of sexual autonomy. Such implication entails the patriarchal ideology in which the operation of local print media is grounded.
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  • Chang, Shu-Nu, 1975- (författare)
  • Investigating Taiwanese 9th-graders’ scientific literacy via authentic assessment
  • 2008
  • Ingår i: Asia-Pacific Forum on Science Learning and Teaching. - 1609-4913. ; 9:1, s. article 15-
  • Tidskriftsartikel (refereegranskat)abstract
    • The purpose of this study is to introduce Taiwanese last curriculum standards and the development of authentic assessment to investigate 9th-graders’ scientific literacy in Taiwan. From this study, it was revealed that authentic assessment provided another possibility to evaluate students’ scientific cognition better than the traditional achievement tests. Besides, the hands-on activity developed by this study offered an opportunity to make students enjoy the examination more and showed a higher consistency with lower-achievement students’ performance on the national entrance exam. The discussion and implementation are presented.
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