Error-space estimate method for generalized synergic target tracking

To improve the tracking accuracy and stability of an optic-electronic target tracking system, the concept of generalized synergic target and an algorithm named error-space estimate method is presented. In this algorithm, the motion of target is described by guide data and guide errors, and then the maneuver of the target is separated into guide data and guide errors to reduce the maneuver level. Then state estimate is implemented in target state-space and error-space respectively, and the prediction data of target position are acquired by synthesizing the filtering data from target state-space according to kinematic model and the prediction data from errorspace according to guide error model. Differing from typical multi-model method, the kinematic and guide error models work concurrently rather than switch between models. Experiment results show that the performance of the algorithm is better than Kalman filter and strong tracking filter at the same maneuver level. __________ Translated from Journal of University of Electronic Science and Technology of China, 2007, 36(2): 217–219 [译自: 电子科技大学学报]     

泉州传统建筑中气候性因素的当代表现

气候性因素是影响传统建筑形式的要素之一.对于泉州传统建筑而言,其气候性因素的表现有显著的特点,但在当代运用中又存在一些明显的缺陷.因此,借鉴当代地域性建筑设计中的气候性对策,分析并归纳出符合泉州当代建筑的气候性对策及其在建筑设计中的应用.     

Matching Trajectories of Anatomical Landmarks Under Viewpoint,Anthropometric and Temporal Transforms

An approach is presented to match imaged trajectories of anatomical landmarks (e.g. hands, shoulders and feet) using semantic correspondences between human bodies. These correspondences are used to provide geometric constraints for matching actions observed from different viewpoints and performed at different rates by actors of differing anthropometric proportions. The fact that the human body has approximate anthropometric proportion allows innovative use of the machinery of epipolar geometry to provide constraints for analyzing actions performed by people of different sizes, while ensuring that changes in viewpoint do not affect matching. In addition, for linear time warps, a novel measure, constructed only from image measurements of the locations of anatomical landmarks across time, is proposed to ensure that similar actions performed at different rates are accurately matched as well. An additional feature of this new measure is that two actions from cameras moving at constant (and possibly different) velocities can also be matched. Finally, we describe how dynamic time warping can be used in conjunction with the proposed measure to match actions in the presence of nonlinear time warps. We demonstrate the versatility of our algorithm in a number of challenging sequences and applications, and report quantitative evaluation of the matching approach presented.     

循环流化床返料机构的研究

本文主要对各种形式的颗粒返料机构进行了研究。根据实验结果和理论分析,本文提出了高浓度气固混合物在L阀中流动时的压力损失的计算公式。本文还提出了L阀和流化床返料机构的设计方法。并给出了设计所需要的全部计算公式。     

不同燃烧器高宽比下炉内空气动力特性的试验研究

本文应用相似模化理论对烟煤型燃烧器进行炉内冷态试验研究.通过对一次风射流的偏转,炉内气流的旋转强度、充满程度,燃烧器射流两侧的补气条件,炉膛出口的速度分布等特性随着燃烧器高宽比H/B的变化规律的研究,提出了较为理想的大型电站锅炉烟煤型燃烧器高宽比的范围,为指导电站锅炉燃烧器的设计和改造提供理论参考。     

现代维修理论概要

本文简介了现代维修理论的形成和发展,综述了现代维修理论的主要内容体系、基本特征和基本要点.并对现代维修理论的重要成果之一——以可靠性为中心的维修(即RCM)作了分析,指出了应用RCM的方法和步骤.     

基于软PLC和CAN总线的自动定量包装机控制方案

自动定量包装机广泛应用于化肥、饲料、轻工等行业.目前,其控制系统大多采用传统硬PLC.软PLC技术是一种基于PC的新型控制技术,具有强大的网络通讯和数据处理能力,是目前自动化领域的研究热点之一.文章介绍了以德国3S公司的软PLC产品CoDeSys以及CAN总线为基础的分布式自动定量包装机控制方案,该方案可以实现自动称量和包装、产量统计、打印报表和远程监控等功能.     

长江南京三桥建桥后船舶航行过程数值模拟

建立了船舶运动基本方程，通过实船静水操纵性能试验比较，操纵性指数与实测基本一致，由于南京三桥修建后，破坏原来的航线，需要规划新的航线，新航线考虑了船舶的习惯航线以及桥墩对原来的航线的影响，运用该数模计算新航线的船舶操作参数的变化，结果表明，上行船队和下行船队的各级流量船舶航行操作参数变化较小，说明新航线选择合理。     

噻吩与Mo(100)和W(100)面相互作用的EHMO研究

本文用EHMO法确定了Mo(100)和W(100)面吸附噻吩的最优几何构型,结合能,净电荷分布等。同时分析了吸附体系的成键特征,结果表明:噻吩的硫原子键合到四重轴空位上,且到第二层金属原子的距离为0.133nm,噻吩分子的π轨道与顶层金属成键。同时分子倾斜平面与金属面法线成18°定位,所得的吸附构型与实验基本一致。     

Study on Agglomeration and Densification Behaviors of Gadolinium-Doped Ceria Ceramics

By synthesizing reactive powders via a self-sustaining combustion synthesis, the glycine-nitrate process, the gadolinium-doped celia （GDC） with the chemical formula Ce0.8Gd0.2O1.9 was prepared. The resultant powders were dispersed with the terpineol as the dispersant through different methods such as ball milling and high-shear dispersing. Coagulation factor （CF） was used to mark the degree of agglomeration on the nano-scale GDC in this work. The effect of agglomeration on the densification behavior at different sintering temperatures was investigated. The studies indicated that agglomeration retarded the densification at the sintering stage. The powders with better dispersion exhibited a higher sintered density at the same temperature. After effective dispersion treatment, GDC could be fully densified at the sintering temperature of 1300 ℃. The densification temperature was significantly lower than those reported previously. The high sintering kinetics of the ceramics was obtained based on the agglomeration control.