戏剧性的交易——记伦敦国际金融期货市场

对于我这个初涉金融期货世界的人来说,置身于伦敦国际金融期货与期权交易所大厅内(世界最大的金融期货市场),看着身着红、绿、黄、蓝各色工作服的人们围作一团,挥舞手臂,高声叫喊,并频繁地互换各式手姿的样子,仿佛置身于一个喧闹的戏剧舞台。     

基于演化算法的实因式分解

针对线性定常闭环系统特征方程的求根问题，提出了一种基于演化算法的实因式分解法。该法先将实因式分解问题转化为数值优化问题，再用基于混合杂交与间歇变异的演化算法求解该优化问题。数值实验结果表明了所提方法的有效性。     

机电专业一体化教学的改革与创新

该文首先分析了当前我国机电一体化教学的不足,然后提出了合理而科学的建议,从而保证机电一体化教学改革和创新的顺利进行。     

应用于长期演进系统降峰值平均功率比的IP-PTS方法研究

为了减小SC-FDMA系统中过高的峰值平均功率比(PAPR)造成的非线性失真,同时克服传统PTS方法计算复杂度大的缺点,提出了两种降PAPR的 IP-PTS方法:LCC-IP-PTS和迭代LCC-IP-PTS方法. 仿真结果表明,LCC-IP-PTS方法在无损系统PAPR性能的情况下大大降低了计算复杂度. 迭代LCC-IP-PTS方法在第一种方法的基础上以牺牲仅0.2 dB的PAPR性能进一步降低了计算量. 这两种方法尤其是第二种实用性强,效率高,适合应用在SC-FDMA系统以及其它OFDM通信系统中.      

保护幼儿的自尊心帮助他们树立自信心

自尊心和自信心是每个健全人最基本的需要，自尊是上进的基础和动力，自信是成功的钥匙，给每个孩子以最大的信任，正确的帮助和引导使其成为人格完善的人，是我们责无旁贷的职责。自尊心、自信心是孩子成长的精神支柱，是幼儿向善的基石和自我发展的内在动力。人最可怕的就是心灵中最敏感的自尊心受到伤害，每个幼儿都有很强的自尊心，都同样应该得到保护。     

Elastic behavior of disclination dipole near nanotube with surface/interface effect

In this paper, we present an analytical solution of the interaction of the nanotube （NT） with a wedge disclination dipole in nanotube-based composites. The corresponding boundary value problem is solved exactly by using complex potential functions. The explicit expression of the force exerted on disclination dipole is given by using the generalized Peach- Koehler formula. As a numerical illustration, both the equilibrium position and the stability of the disclination dipole are evaluated for different material combinations, relative thickness of an NT, surface/interface effects, and the features of the disclination dipole. The results show that as the thickness of the NT layer increases, the NT has a relatively major role in the force acting on the disclination dipole in the NT-based composite. The cooperative effect of surface/interface stresses and the NT becomes considerable as the increase of NT layer thickness. The equilibrium position may occur, even more than one, due to the influences of the surface/interface stress and the NT thickening. The influences of the surface/interface stresses and the thickness of the NT layer on the force are greatly dependent on the disclination angle.