Video synchronization and its application to object transfer

In video post-production applications, camera motion analysis and alignment are important in order to ensure the geometric correctness and temporal consistency. In this paper, we trade some generality in estimating and aligning camera motion for reduced computational complexity and increased image-based nature. The main contribution is to use fundamental ratios to synchronize video sequences of distinct scenes captured by cameras undergoing similar motions. We also present a simple method to align 3D camera trajectories when the fundamental ratios are not able to match the noisy trajectories. Experimental results show that our method can accurately synchronize sequences even when the scenes are totally different and have dense depths. An application on 3D object transfer is also demonstrated.     

Evaluation of a job‐aiding tool in inspection systems

Visual inspection plays a very important role in ensuring quality in the manufacturing and service industries. Two determinants of inspection performance are visual search and decision‐making. Improvement in any one of the components will have an impact on system performance. Job‐aids, accompanied by training, have proven to be effective in enhancing accuracy and reducing search time in visual inspection systems. This article aims to investigate the effects of search strategy along with task complexity and pacing on inspection performance using a job‐aiding tool. To facilitate the experiments, an enhanced job‐aiding tool in a simulated visual inspection environment was developed. This tool enables an inspector to track his or her search path in visual inspection systems. A pilot study and two experiments were conducted using this tool. The pilot study examined the effectiveness of the job‐aiding tool. The first experiment studied the effect of search strategy and task complexity on inspection system performance and the second experiment studied the impact of search strategy, task complexity, and pacing on system performance. Results from this research can be used to better design an inspection system. © 2007 Wiley Periodicals, Inc.     

无线传感器网络代码更新协议研究

无线传感器网络代码更新协议和路由协议都有着低能量、高通信效率等相似的特征,但也在通信方向、可靠性要求、维护策略方面存在着一些显著的差别;在研究目前已经存在的无线传感器网络代码更新协议的基础上,先提出了无线传感器网络代码更新所面临的挑战,然后从能量、存储空间、通信方式、算法、通信控制等方面总结了代码更新协议的特征,并对不同的更新协议相关项进行了比较,最后指出了代码更新协议的研究思路以及未来的发展趋势。     

复杂路线下机器人的三点三轮寻迹系统

针对寻迹时的复杂路线,设计一种简单的机器人。该机器人以AT89C52单片机为控制芯片,使用3个自制的红外光电传感器来辨别路线,具有设计简单、成本较低等特点。测试表明,该机器人能顺利地完成复杂路线下的寻迹,其双级转弯的设计使得寻迹更为准确。     

基于海尔H12011芯片的DVB-S2接收系统

根据新一代数字卫星广播DVB-S2标准的特点,提出一种基于海尔公司H12011CPU的数字卫星信号接收系统;详细说明了电路系统各个主要模块,包括H12011CPU模块、ZL10038和H13102芯片组成的信道解码电路模块以及其它经典外围电路模块等;根据前期设计电路时的分析论证,以及通过对实际制作样本的测试;该系统解调处理后得到的卫星电视信号,图像画面连贯、清晰;立体声质量良好,均达到各项标准;本设计方法简单、可靠,并且成本较低,具有一定的实用价值.     

An end-to-end QoS control model for enhanced internet

This paper describes an end-to-end QoS(Quality of Serviece) control model for distributed multimedia computing on enhanced Internet,and gives the design and implementation of this model including hosts and routers.The architecture,the mathematical definition about QoS parameters,and the mapping between Integrated Service(IS)and Differentiated Service(DS) are discussed in this paper,The simulation shows that this model can improve the performance of audio streams when it is used in IPhone system.     

平衡火罐疗法联合重复经颅磁刺激对 脑卒中后疲劳患者疲劳程度的影响

摘 要:目的 观察平衡火罐疗法联合重复经颅磁刺激对脑卒中后疲劳患者疲劳程度的影响。方法 收集我院2020年6月—2021年9月于脑病科、针灸科住院的脑卒中后疲劳患者80例。采用随机数字表法分为对照组和治疗组,每组各40例。对照组给予常规基础治疗及康复训练,每日1次,共治疗4周,治疗组在对照组基础上加平衡火罐疗法（每周 2 次）和重复经颅磁刺激治疗,每日1次,共治疗4周。分别于治疗前和治疗4周后,采用疲劳严重程度量表（FSS）、汉密尔顿抑郁量表（HAMD）、汉密尔顿焦虑量表（HAMA）、匹兹堡睡眠指数（PSQI）对两组患者疲劳程度、情绪状态、睡眠情况进行评估,并比较两组患者治疗前后各评分变化。结果 治疗后,两组患者的FSS、HAMD、HAMA、PSQI评分均较治疗前明显改善（P＜0.05）,且治疗组改善幅度明显优于对照组,差异有统计学意义（P＜0.05）。结论 平衡火罐疗法联合重复经颅磁刺激能有效改善脑卒中后疲劳患者的疲劳程度。     

W6+掺杂Pb(Sc,Nb)O3-Pb(Hf,Ti)O3陶瓷的制备和性能研究

该文采用传统固相反应法制备了W⁶⁺掺杂的0.07Pb(Sc_0.5Nb_0.5)O₃-0.93Pb(Hf_0.47Ti_0.53)O₃(PSN-PHT)陶瓷,详细分析了样品的晶体结构、压电和介电性能。实验结果表明,W⁶⁺掺杂可以提高钙钛矿结构中三方相的含量,有效增加晶粒尺寸,提高压电系数。当W⁶⁺掺杂量(摩尔分数)为1.0%时,样品具有最佳的压电和介电性能,即d₃₃=585 pC/N,T_C=323℃,ε_r=2 088。同时,样品的d₃₃在200℃去极化温度下仍保持570 pC/N的高值,且经过1 080 min保温后,压电常数略微降低,此时d₃₃仍可达到537 pC/N,变化仅为5.7%。上述结果表明,W⁶⁺掺杂不仅可以提高压电系数,同时也可增强陶瓷的温度稳定性,使该陶...     

面向新型电力系统潮流频繁波动的无功鲁棒分区方法

随着可再生能源及柔性负荷渗透率的大幅增长,电力系统运行随机波动性增强,电网运行形态及系统特性发生较大改变。针对传统无功分区方法在匹配源荷双重特性变化中的不足,提出一种面向新型电力系统潮流频繁波动的无功鲁棒分区方法,在计及电网物理特性的基础上,利用电网的拓扑结构特点增加区域划分的鲁棒性。首先,提出一种名为“混合边权”的无功网络拓扑边权定义方法,为电网结构划分提供标度;然后,设计了基于并行GN算法的电网分区流程,并引入一种基于可达矩阵的分区连通性判断策略;最后,以IEEE标准算例分析了混合边权参数的特性,并以中国东部某区域电网为例进行验证。结果表明,所设计的无功分区策略能够有偏重地得到质量较高的分区结果,且能在潮流频繁波动情况下有效地稳定分区边界节点。     

工作流自动化及在房地产管理OA系统中应用

通过对节点控制的工作流自动化技术及其在房地产管理OA系统中应用研究分析,并结合襄樊市高新区规划建设环保局房地产管理OA子系统的应用实例,提出了在房地产管理OA系统中基于节点控制的工作流自动化的具体实现方法。同时说明了基于节点控制的工作流自动化是中小城市房地产管理OA系统的可行实现方案。