Design optimization of a runflat structure based on multi-objective genetic algorithm

Runflat structure plays an important role in determining the sustainable mileage after the tire is shot. Lightweight, stiffness and strength are highly relevant to the overall performance of the structure. A parameterized model was built based on the full study of the structure, and a new adaptive meshing method is proposed to ensure the quality of the model. The accuracy of the new model was verified by comparing to the traditional finite element model. The parameter study was carried out to investigate the response of the performance and mass. Multi-objective optimization model was established by applying optimal Latin square design method and response surface model approach. Non-dominated sorting genetic algorithm-II (NSGA-II) was applied to obtain the optimization design. The results indicate that the combination of parameterized model and multi-objective genetic algorithms successfully achieve the goal of multi-objective optimization for mass and displacement while ensuring the stress. Meanwhile, the optimal topology, shape and thickness optimization for the runflat structure have been achieved at the same time.     

大空间图像型火灾探测算法的研究

针对火灾视频图像中一般亮点区域较小,背景区域占据图像大部分的特点,采用区域分割算法将各个亮点区域提取出来,分别进行处理,提高了算法的抗干扰性,使相同算法的处理时间平均减少到原来的五分之一,使文中使用的复杂算法达到实时性要求;同时在区域分割算法的基础上,成功地提取了疑似区域的边界链码,并在此基础上计算了各个区域的圆形度,从而又增加了两个火灾判断的判据：边界链码和圆形度;并通过神经网络进行数据融合,可进一步降低火灾探测系统的误报率。     

A Target Grabbing Strategy for Telerobot Based on Improved Stiffness Display Device

Most target grabbing problems have been dealt with by computer vision system, however, computer vision method is not always enough when it comes to the precision contact grabbing problems during the teleoperation process, and need to be combined with the stiffness display to provide more effective information to the operator on the remote side. Therefore, in this paper a more portable stiffness display device with a small volume and extended function is developed based on our previous work. A new static load calibration of the improved stiffness display device is performed to detect its accuracy, and the relationship between the stiffness and the position is given. An effective target grabbing strategy is presented to help operator on the remote side to judge and control and the target is classified by multi-class SVM (supporter vector machine). The teleoperation system is established to test and verify the feasibility. A special experiment is designed and the results demonstrate that the improved stiffness display device could greatly help operator on the remote side control the telerobot to grab target and the target grabbing strategy is effective.      

基于灰色BP神经网络模型的煤矿地下水位预测研究

针对煤矿地下水位监测精度不高的问题,提出灰色BP神经网络预测煤矿地下水位的模型.分别利用灰色预测理论、BP神经网络模型和灰色BP神经网络对某煤矿一观测井地下水位进行预测,仿真数据表明采用灰色BP神经网络模型预测煤矿地下水位更为准确.     

脉搏血氧饱和度远程实时监护系统设计

为实现医生同时对多个患者的血氧饱和度的远程实时监护,设计了一种基于因特网的脉搏血氧远程实时监护系统.该系统分为患者端和医生端.患者端采用以C8051F320为处理核心的血氧检测电路提取相关血氧信号,通过USB传输到上位机进行处理、分析和显示;并通过因特网将数据实时发送至远程医生端显示、存储.实验测试表明,该系统具有延时小、可靠性较高和较大的应用前景等优点.     

一种无线电引信杆试验升降装置

针对目前广泛使用的无线电引信杆试验升降装置的不足，提供一种先进、简单、实用的升降装置，此装置主要由一体化减速、制动电机和控制电路组成，具有体积小、可靠性高、成本低廉等优点，是解决无线电引信杆试验测试弹升降问题的较好方案。     

亚磷酸氢钙生产工艺研究

讨论了一种制备亚磷酸氢钙的新方法，并在实验室条件下制出了纯净白色的亚磷酸氢钙产品，产品收率达９８％。     

广义倍数原理及其应用

本文提出了广义倍数原理,大家熟知的“柯氏倍数原理”只是它的一个特例。用它可使更多的受侧力多跨多层刚架简化为单跨多层刚架来计算,大大地扩大了倍数原理的应用范围。     

高频红外吸收测定碳化硅中的SiC

介绍了一种快速测量碳化硅中的SiC质量分数的方法。首先对SiC试样进行灼烧预处理,除去游离碳,用SiC标准样品校正仪器校正,然后用锡粒、钨粒、纯铁作助熔剂,用高频红外碳硫仪测定碳化硅中的SiC。该方法简洁准确,可用于指导生产。