粮食干燥系统仿人智能控制及其仿真

在对粮食干燥系统的动态特性分析的基础上,应用智能控制理论设计了粮食干燥系统的仿人智能控制器,并在MATLAB环境中建立系统模型进行仿真,将仿人智能控制与PID控制效果进行比较。仿真结果表明,该方法比PID有较好的动态调节特性。     

基桩动测解析解在浅部缺陷桩测试曲线分析中的应用

文章介绍了基桩低应变动测正演问题的数理模型及计算方法,并据此计算了桩身浅部缩颈、断裂时低应变动测时域和频域理论曲线,提出了判断桩身浅部缩颈、断裂的方法,对浅部缺陷桩的动测曲线进行分析和判断,证实了这种方法行之有效。     

感潮河段上游流量对潮位预报的影响

以长江口天生港站、徐六泾站、杨林站为例,基于大量样本建立了各站日均增水与大通流量增量之间的关系,并利用所得关系式,根据上游流量的大小,对潮汐预报模型计算的过去若干年的潮位进行校正.经过校正,3站日均潮位预报误差的绝对值≤20 cm的合格率分别由77.3%提高到92.1%,76.3%提高到88.7%,83.8%提高到89.2%.该方法也适用于其他感潮河段潮位的预报.     

基于卡尔曼滤波的高速道路行程时间动态预测

首先介绍了卡尔曼滤波的算法，并定性说明了其优点－动态性、实时性。然后使用卡尔曼滤波法和传统的预测方法分别对同一观测数据进行了观测和对比，从而定量证明了卡尔曼滤波的高精度性，研究成果对于开发交通信息诱导系统和动态交通分配均具有较大的意义。     

钢-聚氨酯组合管柱轴压性能试验

基于13个钢-聚氨酯复合管试件的轴压试验，研究聚氨酯在钢复合管中的应用。结果表明，在承受轴向压力下，钢-聚氨酯复合管轴压试件破坏时呈多折腰鼓形；钢管发生局部屈曲后，受到聚氨酯材料的约束可以有效延缓试件屈曲发生时间与变形程度；整个加载过程，聚氨酯与钢材的黏结性能良好，两者未发生剥离现象。从试件荷载-位移曲线以及试验过程可得:荷载-位移曲线一般由弹性、弹塑性、下降和强化阶段组成，表明复合管具有很好的延性与强度储备，能有效抵抗地震等动力荷载的作用。随着L/D的减小，试件的极限荷载有增大的趋势，但是其增幅不明显。套箍系数ξ是影响试件性能的重要因素，当ξ值提高时试件承载力会明显提高；反之亦然。     

Micro-robot design based on swimming mechanism of bacterial flagella

Nanomachines are controllable machines at the nano meter or molecular scale that are composed of nano-scale components. They have their own mechanochemistry, dynamics, workspace, and usability and are composed of natures building blocks: namely proteins, DNA, and other compounds. Some bacteria (i. e. Escherichia coli) swim by rotating helical flagella. The structure and motion character of the flagellum are introduced. Through the study, a micro-robot was designed and its mechanical structure was explained in this paper. In the future, the bionic micro-robot is expected tobe built, which can travel inside the human body and carry out a host of complex operations such as minimally invasive surgery, highly localized drug delivery, and screening for diseases that are in their very early stages. It is important to medicine and could be applied in other areas, including space exploration, electronics and military.