Moments and limiting distribution of a portfolio of whole life annuity policies

A dual random model of a portfolio of variable amount whole life annuity is set with themth moment of the present value of benefits, and the respective expressions of the moments under the assumption that the force of interest accumulation function is Wiener process or Ornstein-Uhlenbeck process. Furthermore, the limiting distribution of average cost of this portfolio is discussed with the expression of the limiting distribution under the assumption that the force of interest accumulation is an independent increment process.     

冲击电流计特性研究实验中对偏转线圈运动状态的数学分析

简要介绍了冲击电流计的工作原理,运用数理方法和电磁学知识分析研究了冲击电流计中偏转线圈在磁场中的运动状态,推导出描述各运动状态的物理量表达式,揭示其运动规律.     

Lower limb moments differ when towing a weighted sled with different attachment points

Sprinting while towing a sled improves sprinting parameters, however, only kinematic and temporal–spatial variables have been reported. The purpose of this study was to determine how lower extremity joint moment impulses alter when towing a sled compared to normal walking. Twelve participants walked normally, walked while towing a sled with a 50% body weight load attached at the waist, and with a 50% body weight load attached at the shoulders. Joint moment impulses were calculated for the hip, knee, and ankle. A mixed-model ANOVA with a between-subject factor of limb and repeated measures of condition was used to compare differences between limbs and towing conditions for each joint. Towing a sled increased joint moment impulses at the hip, knee, and non-dominant ankle. When compared with normal walking waist attachment increased hip extension moment impulse by 214.5% ( ? 3.31 vs. ? 10.41 Nms/kg), and shoulder attachment increased knee extension moment impulse by 166.9% (4.62 vs. 12.33 Nms/kg). The dominant limb produced greater knee extension moment impulse (p < 0.001), while the non-dominant limb produced greater hip extension (p < 0.001) and ankle plantarflexion moment impulse (p < 0.001) across all conditions. Results suggest that walking while towing may increase hip and knee extension strength.     

顺应论视角下《京华烟云》两译本女性服饰翻译研究

英文小说Momentin Peking中服饰描写具有浓郁的传统文化风格。基于Vershueren顺应理论,通过对比分析两译本女性服饰翻译,认为服饰翻译应该顺应汉文化习惯性认知方式和接受心理、顺应汉语言习惯性表达结构,遵循顺应论的原则并形成有效的翻译顺应技巧。     

基于颜色的图像检索方法研究

图像的颜色特征相对于图像的其它特征而言具有较强的稳定性,因而在图像检索领域具有广泛的应用。在颜色直方图的基础上,研究了欧式距离法、直方图相交法和中心矩法3种图像匹配算法,并在VC++6.0平台上编程实现。实验结果表明,这3种方法都能达到较好的检索效果。     

《京华烟云》中的牛素云形象解读

《京华烟云》是林语堂先生的代表作,从女性主义的角度对书中牛素云的形象进行解读,展现林语堂先生在受到西方文化的影响下,成功地塑造出一个新女性的成长过程,即从一开始束缚在封建父权牢笼,到后来不断与命运抗争,最后实现自我重建,成为新女性的过程.     

《京华烟云》中文化元素的回译

回译是通过拟译文本与目的语文本间内在的语言和文化联系,把拟译文本中源自目的语的语言文化素材重新译回源语的翻译活动。本文以林语堂的长篇小说《京华烟云》为研究对象,选取文中涉及到的中国传统文化元素,通过分析译文中对于这些元素的再现或删减,旨在提高该类特殊文本中文化元素的正确还原。     

羽毛球典型步法中下肢关节生物力学特征分析

采用即时红外高速摄影技术及三维测力台同步采集7名优秀羽毛球运动员蹬跨步上网接球动作的三维运动学及动力学数据,并计算各关节角参量、力矩和下肢关节肌群功率变化特征。研究结果表明：髋关节屈肌群、膝关节伸肌群、踝关节屈肌群的快速做功能力对羽毛球运动中蹬跨步上网具有极其重要的影响。同时,膝关节屈肌群的能力对跨步蹬跨步上网避免股后肌群的损伤具有不可忽视的作用,在训练中要加强对股后肌群的专项化力量训练。     

回忆·记忆·遗忘——再读《朝花夕拾》

研究＂五四＂落潮期的鲁迅思想情感的轨迹,《朝花夕拾》无疑是一本值得重视的著作。论文着重阐发＂回忆＂在《朝花夕拾》中的地位、形态和意义,试图分析隐含在文本背后的、纠结于创作主体内心的现代个体与传统集体之间的矛盾活动过程。