空心纳米球耦合到基底的热力学性质研究

应用弹性波理论研究不同的空心Si纳米球弱耦合到半无限长的基底上在微扰近似下的振动态密度,结果发现在低频下耦合空心球的振动模有明显的展宽和改变.通过求解声子传播函数的Dyson方程得到空心球的振动态密度,并进一步研究了空心球的热力学性质.     

基于单片机的LED旋转式显示屏设计

基于视觉暂留特性设计并制作了一个13点线阵LED模块的显示屏。该系统可实现中文字符的显示和动态特效显示,将STC89C52单片机与发光二极管模块固定在电机的旋转轴上通过电机的旋转带动模块转动,再利用单片机控制发光二极管的亮灭,最后利用人眼的视觉暂留,构造出一个旋转的LED显示屏。     

Soliton structures in the (1+1)-dimensional Ginzburg–Landau equation with a parity-time-symmetric potential in ultrafast optics

In this paper, the(1+1)-dimensional variable-coefficient complex Ginzburg–Landau(CGL) equation with a paritytime(PT) symmetric potential U(x) is investigated. Although the CGL equations with a PT-symmetric potential are less reported analytically, the analytic solutions for the CGL equation are obtained with the bilinear method in this paper. Via the derived solutions, some soliton structures are presented with corresponding parameters, and the influences of them are analyzed and studied. The single-soliton structure is numerically verified, and its stability is analyzed against additive and multiplicative noises. In particular, we study the soliton dynamics under the impact of the PT-symmetric potential. Results show that the PT-symmetric potential plays an important role for obtaining soliton structures in ultrafast optics, and we can design fiber lasers and all-optical switches depending on the different amplitudes of soliton-like structures.     

液体表面张力系数测量装置的改进

对用力敏传感器测量液体表面张力系数仪器进行研究,重新设计了吊环,便于吊环的水平调节,对待侧液体表面均匀下降的方法和实验装置做了重新设计,减小了实验误差,同时增加了待测液体的变温控制,能够精确测量液体表面张力系数与温度的关系,扩充了实验内容.     

基于 W i F i模块手机控制小车的设计与制作

: 以智能玩具小车为硬件平台, 以 AT 8 9 S 5 1单片机为控制中心, 通过 W i F i模块实现数据传输, 由太阳 能电池板和电池为混合动力, 制作了手机智能控制的多功能小车. 具有音乐播放, 实时监测周围环境温度, 通过摄像 头实时查看周围环境等功能.     

太阳能自动微灌演示系统设计

太阳能自动微灌演示系统以使用太阳能电池充电的蓄电池作为系统电源,以AT89S52为控制中心,实时自动检测模拟实验箱内的温度与湿度,同时配有无线收发NRF24l01模块,实时在控制端显示当前温湿度值,当检测温度湿度超过设定的上限值时,NRF24l01模块会向数据控制端发送中断,并自动接通继电器控制水泵工作,实现温湿度自动调节,并实时通知使用者大棚内的状况.使用者能通过控制器操作来降低实验箱内的温度与湿度.     

声悬浮及声速测定实验仪的设计

《声速测定》是大学物理实验中比较普遍的一个综合性实验。在声速测定实验仪的基础上,改进了信号源,并制作了声悬浮配件,使其实现既可以用多种方式测量声速,又可演示声悬浮实验现象。声悬浮及声速测定实验仪悬浮稳定性强,声速测定准确,仪器造价低,使用方便,这样设计节省了实验室资源和空间。     

Effective Control of Three Soliton Interactions for the High-Order Nonlinear Schr?dinger Equation

We take the higher-order nonlinear Schr¨odinger equation as a mathematical model and employ the bilinear method to analytically study the evolution characteristics of femtosecond solitons in optical fibers under higherorder nonlinear effects and higher-order dispersion effects. The results show that the effects have a significant impact on the amplitude and interaction characteristics of optical solitons. The larger the higher-order nonlinear coefficient, the more intense the interaction between...