跟踪系统中跟踪器延迟的自适应预测补偿方法

跟踪系统中跟踪器的延迟会对系统的稳定性和跟踪精度产生不利影响。为此以典型Ⅱ型系统为例，理论上定理地分析了跟踪器延迟对跟踪系统的影响，并提出了将采用LMS算法和横向滤波器结构的自适应滤波器用于延迟预测补偿的方法。仿真结果验证了方法的有效性。     

用奇异模型描述的受限机器人的学习控制

本文了一类受限机器人的迭代学习控制方案，控制器的设计是基于机器人模型的降阶形式。在存在有界未知干扰的情况下，对末端操纵器受线性、无摩擦约束面的受限机器人。本文给出的控制方案保证了机器人系统的完全运动跟踪，同时保证了力跟踪误差有界的，且界的大小是可调节的。     

具有再生反馈雷达的角跟踪性能闭环测试

本文论述了用雷达跟踪目标最大角速度和角加速表征具有再生反馈雷达角跟踪性能的合理性,并论述了用单片机测试雷达跟踪目标最大角速度和最大角加速的方法。     

Strain analysis of moving objects using a Fourier transform grid method

There is no good method to measure the shape and the strain distributions of a structure changing with time. We have previously proposed the Fourier transform grid method (FTGM) to measure the three-dimensional shape and surface strain distributions of stationary objects by analysing the two-dimensional grating images recorded with two cameras. In the stereoscopic method, it is very important to determine the accurate geometric parameters of the camera system. In this paper, the positions and the directions of cameras are accurately determined using the FTGM applied to images of a reference object on which a two-dimensional grating is drawn. Applications for analysing shape and strain distributions of vibrating rubber plates and a moving human skin are shown.     

快热中子法检测煤的低位热值

介绍了利用脉冲中子发生器产生的快热中子感生的瞬发γ射线的两种反应,快中子非弹性散射(n,n'γ)反应和热中子俘获(n,γ)反应,对煤的低位热值进行分析的方法、原理和设备.γ射线探测器采用BGO探头.采用多元回归分析方法,较好地解决了元素间的干扰问题.用脉冲中子法测得的低位热量分析值与化验值的误差＜0.4MJ/kg.     

稀疏气泡流动的粒子跟踪测速技术研究

采用动态阈值技术实现了对气泡图像的正确分割，利用灰度加权方法提高了气泡颗粒的定位精度。根据稀疏气泡流动图像的特点，提出了一种新的基于相关的粒子跟踪测速算法（2-HPTV）。通过进行两时刻中围绕待研究气泡所取的两个小的诊断窗口的相关运算，成功实现了气泡颗粒的轨迹追踪。实验表明本文算法较传统的PIV技术在测速精度上有很大程度的提高，与4帧粒子跟踪测速算法相比，降低了对摄像机帧频的要求，具有较强的实用性。     

乳化酸+硝酸粉末酸压技术在泥灰岩储层中的应用

华北油田泥灰岩储层曾进行多种类型的酸化增产改造工艺,但均未取得理想效果。经过对泥灰岩地层进行大量的油藏地质、室内试验研究以及工程、地质技术人员的反复论证,优选出一种切实可行的酸压改造措施——前置液+高温乳化酸+固体硝酸酸压工艺。经过现场应用,收到了较好的增产效果,为华北油田泥灰岩储层改造措施找到了突破口。     

Gorillas (Gorilla gorilla) and Orangutans (Pongo pygmaeus) Encode Relevant Problem Features in a Tool-Using Task.

Two important elements in problem solving are the abilities to encode relevant task features and to combine multiple actions to achieve the goal. The authors investigated these 2 elements in a task in which gorillas (Gorilla gorilla) and orangutans (Pongo pygmaeus) had to use a tool to retrieve an out-of-reach reward. Subjects were able to select tools of an appropriate length to reach the reward even when the position of the reward and tools were not simultaneously visible. When presented with tools that were too short to retrieve the reward, subjects were more likely to refuse to use them than when tools were the appropriate length. Subjects were proficient at using tools in sequence to retrieve the reward. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

束流测量中的工频陷波器

提出了一种应用于电子束曝光机束流测量中的自动跟踪工频陷波器，给出电路结构，基于对其工作原理的分析，介绍了提高陷波器跟踪精度的设计要点及调试方法。     

采集太阳光的照明系统研究

简要介绍了欧美和日本在采集太阳光用于室内照明技术研究的进展及我国在研究开发全自动跟踪太阳的采光装置，攻克聚光、跟踪和传光等关键技术所取得的成果。指出研究全光谱利用，结合采光技术和光伏发电技术，达到代电和发电功能是进一步研究、发展的目标。