仿人足球机器人目标定位与追踪算法改进

对于仿人足球机器人来说,视觉功能是极其重要的。在足球机器人的各种关键技术中,机器视觉是应用范围最广,最为基本的技术之一。移动机器人视觉的研究主要集中在颜色模型建立、目标识别、定位以及跟踪等方面。仿人机器人视觉系统的识别与定位算法也是目前的研究热点,目标的实时识别与定位是足球机器人在足球赛中精确踢球的前提。文章主要是针对目前足球机器人在视觉系统上所存在的问题进行了颜色模型建立及目标定位算法的改进,加入了目标追踪算法,确保目标识别与定位的准确。在i Kid足球机器人上进行试验并调试,试验结果具有较好的实时性和准确性。     

基于DSP和局域网的医疗护理监控系统的设计

随着社会的不断进步,人们对护理工作的要求也越来越高,护理工作好坏直接关系着医院的发展。因此,本文研究设计了一种基于DSP和局域网的医疗护理监控系统,并对此设计作了简要分析,促进了医院医疗护理工作的发展。     

A Parameter Identification Method to Determine Salinity of Sea Ice Using Temperature and Thickness Observations

This study is intended to provide a parameter identification method to determine the salinity of sea ice using temperature and thickness measurements. This method is particularly effective when field data are sparse and unsatisfactory due to the difficulties associated with fieldwork, especially during the polar winter. The main idea of the method is described. The salinity profile is calculated by the temperature and thickness observations, which were measured at Nella Fjord around Zhongshan Station, Antarctica during the polar night time by the 22nd Chinese Antarctic Research Expedition. Another simulation for temperature profiles during a different measurement period is performed. Results show that better simulations of the salinity and temperature distributions are possible with the estimated parameters than with Eicken’s and THESCI’s methods. This method will help people to understand the salinity evolution of sea ice more thoroughly.     

基于扫描区间表示的不规则多边形快速定位算法及应用

不规则多边形定位算法是排料算法的重要组成部分,其效率对排料算法的性能有重要影响。基于扫描区间表示的不规则多边形定位算法因能适应任意复杂多边形而被广泛采用,但它存在计算量大的不足。通过深入研究基于扫描区间表示的多边形定位算法,该文从两个方面对其方法进行改进：首先提出候选平移位置矩阵的概念,进而实现定位扫描算法;然后通过最大跨度比较法快速排除一些不可能的行,从而通过减少定位扫描算法的调用次数进一步加速。该算法已应用于自主开发服装排料软件,多个实际衣片数据的测试结果证明了该文算法的有效性和高效性。     

关于RTS24袖珍式温度模拟仪的校准方法探讨

本文通过采用FLUKE1529四通道测温仪以及KEITHLEY2001数字多用表两台测量设备分别对RTS24袖珍式温度模拟仪进行了校准、比对和探讨并对其测量结果分别进行了不确定度评定,从而验证了方法的可行性,以期起到同行人员工作之间的交流和参考作用。     

Phase structure,piezoelectric properties,and stability of new K0.48Na0.52NbO3–Bi0.5Ag0.5ZrO3 lead-free ceramics

In this work, (1 ? x)(K_0.48Na_0.52)NbO₃–x(Bi_0.5Ag_0.5)ZrO₃ [(1 ? x)KNN–xBAZ] lead-free piezoceramics was prepared by the conventional solid-state method, and a new phase boundary consisting of three phases [e.g., rhombohedral, orthorhombic, and tetragonal (R–O–T) phases] has been constructed by adding both (Bi_0.5Ag_0.5)²⁺ and Zr⁴⁺. The ceramic with x = 0.05 possesses an R–O–T phase coexistence. A large d ₃₃ of ~347 pC/N and a high T _C of ~318 °C have been shown in the ceramic with x = 0.05. In addition, such a ceramic also possesses enhanced thermal and temperature stability of piezoelectricity and ferroelectricity. Both the phase boundary and the grain size play a critical role in large piezoelectricity and good stability. We think that this material belongs to be one of the promising candidates for the high-temperature piezoelectric devices.     

石墨烯和硅丙乳液复合材料的制备及性能

采用化学氧化还原法和超声分散制备出石墨烯(GN),采用X射线衍射仪、红外光谱和原子力显微镜对所得石墨烯进行了分析和表征。结果表明,氧化石墨烯被较好地还原为石墨烯并且成功分散为纳米级厚度;采用溶液超声共混法制备石墨烯/硅丙乳液复合材料。对复合材料成膜进行扫描电镜表征、热重分析、导电渗流测试、力学性能以及耐水、耐腐蚀性测试,发现复合材料具有较低的渗滤阈值(质量分数0.5%),石墨烯用量大于0.9%时,体积电阻率基本稳定在103Ω·cm以下,导电性有了明显提高;石墨烯的用量为0.7%时,与硅丙乳液相比,复合材料拉伸强度提高了15.5%,断裂伸长率下降了3.6%,耐水性提高了14%,失重5%时的热分解温度提高了43℃,耐腐蚀性能也得到了极大提高。     

黄原酸化交联壳聚糖的制备及表征

微波辐射下,以壳聚糖为原料,环氧氯丙烷为交联剂,二硫化碳为改性剂,制得了黄原酸化交联壳聚糖(XCCTS)吸附剂。采用扫描电镜、红外光谱和X射线衍射光谱对XCCTS吸附Cu2+前后的形貌和结构进行了表征,并研究了黄原酸化条件对Cu2+在树脂上的吸附量的影响。结果表明,XCCTS表面粗糙,具有结晶性,分子中具有能够吸附Cu2+的巯基和羟基。随着CS2用量的增大,吸附时间的延长,XCCTS对Cu2+吸附量均是先增大后减小,二硫化碳用量为2 mL,微波黄原酸化时间为3min时,XCCTS对Cu2+的吸附量可达到44.32 mg/g。