二维各向同性谐振子的守恒张量及其应用

二维各向同性谐振子的第三守恒量是一张量.经研究得到了二维谐振子守恒张量的矩阵表示形式,并用守恒张量的各元素表示振子的运动方程及新坐标系下的轨道方程.     

Distribution of the length of the longest common subsequence of two multi-state biological sequences

The length of the longest common subsequence (LCS) among two biological sequences has been used as a measure of similarity, and the application of this statistic is of importance in genomic studies. Even for the simple case of two sequences of equal length and composed of binary elements with equal state probabilities, the exact distribution of the length of the LCS remains an open question. This problem is also known as an NP-hard problem in computer science. Apart from combinatorial analysis, using the finite Markov chain imbedding technique, we derive the exact distribution for the length of the LCS between two multi-state sequences of different lengths. Numerical results are provided to illustrate the theoretical results.     

A procedure for estimating the number of outliers

A new type of procedure for estimating the number of outliers in a sample is presented and compared with existing procedures. The probabilities of exact, under-, and overestimation with the different procedures are examined for two different contamination schemes.     

基于学生应用能力培养的《机械设计》课程教学探讨

根据应用型本科教育培养目标,从课程体系、课程内容、课堂教学方法与手段等方面对<机械设计>课程教法进行了思考.     

同时按K和[γ]设计曲柄摇杆机构的解析法

阐述了一种同时按行程速度变化系数K和许用传动角[γ]设计曲柄摇杆机构的解析法.该方法简单、明了,能根据机构的传动质量要求预先确定许用传动角[γ],又可避免因出现γmin的位置与机构两极限位置不重合而引起的计算繁杂问题.     

基于直接模态摄动法的无阻尼线性随机结构的随机振动研究(Ⅱ)——随机动力反应分析

提出了基于数论选点的直接模态摄动法,用以求解无阻尼线性随机结构的随机动力反应.以数论选点的直接模态摄动法为基础,求出随机样本的特征值和特征向量,然后利用模态叠加法,求解样本结构在样本荷载作用下的动力反应,把所有的样本反应统计分析,即求得结构的随机反应.由于在计算过程中,没有将随机反应分解为均值部分和摄动部分,因此,采用直接模态摄动法求无阻尼复合随机振动系统的反应不存在久期项问题.算例分析表明,复合随机振动系统的随机反应均值比均值荷载作用下均值结构的确定性反应要小.     

Selfish,Vengeful, and Full of Spite: The representations of women who have abortions on Turkish television

This article analyses the portrayal of women who have abortions in four recent Turkish television series, Gümü?, A?k-? Memnu, Han?m?n Çiftli?i, and Öyle Bir Geçer Zaman ki, all of which appeared between 2005 and 2011. It is clear from the varying storylines of these melodramas that the depiction of women who have abortions on Turkish television is decidedly negative. The women who have abortions are seen as defying cultural expectations to place motherhood before all else. They are portrayed as cheating on their husbands, having sex outside of marriage, and prioritizing career over marriage and family. The negative portrayal of women who have abortions in Turkish soap operas perpetuates the discourse on Republican womanhood, which prescribes motherhood as women's national duty and as being at the core of their identity.     

文化传播视角下中国公共外交的机遇和策略

本文通过分析文化传播因素在公共外交中的地位和作用,认为党和国家对建设社会主义文化强国的重视为当前中国开展公共外交提供了以下机遇:第一,有利于培养国内民众正确的价值观取向、民族认同感和健康的民族心态,为开展公共外交打下良好的国内民意基础;第二,有利于文化事业和文化产业的协调发展,为开展公共外交提供更多具有吸引力的文化产品;第三,有利于加强和完善我国的现代传播体系,为开展公共外交赢得更多的话语权。面对当前的机遇,中国可以从制定明确的中长期规划和阶段性目标、整合公共外交各主体的优势以及加强文化传播体系建设等方面入手推动公共外交向可持续发展迈进。     

改进的寇尔生育指数及在我国的应用

对寇尔生育指数进行了改造，将结果应用于对我国８０年代妇女生育率变动原因的分析之中。