光传送网中客户信号的映射和复用

文章主要介绍了光传送网(OTN)中光传输模块(OTM)的映射、复用结构、光通道数据单元(ODUk)的时分复用以及客户信号的映射方法．     

Gap Junctional Communication via Connexin43 between Purkinje Fibers and Working Myocytes Explains the Epicardial Activation Pattern in the Postnatal Mouse Left Ventricle

The mammalian ventricular myocardium forms a functional syncytium due to flow of electrical current mediated in part by gap junctions localized within intercalated disks. The connexin (Cx) subunit of gap junctions have direct and indirect roles in conduction of electrical impulse from the cardiac pacemaker via the cardiac conduction system (CCS) to working myocytes. Cx43 is the dominant isoform in these channels. We have studied the distribution of Cx43 junctions between the CCS and working myocytes in a transgenic mouse model, which had the His-Purkinje portion of the CCS labeled with green fluorescence protein. The highest number of such connections was found in a region about one-third of ventricular length above the apex, and it correlated with the peak proportion of Purkinje fibers (PFs) to the ventricular myocardium. At this location, on the septal surface of the left ventricle, the insulated left bundle branch split into the uninsulated network of PFs that continued to the free wall anteriorly and posteriorly. The second peak of PF abundance was present in the ventricular apex. Epicardial activation maps correspondingly placed the site of the first activation in the apical region, while some hearts presented more highly located breakthrough sites. Taken together, these results increase our understanding of the physiological pattern of ventricular activation and its morphological underpinning through detailed CCS anatomy and distribution of its gap junctional coupling to the working myocardium.     

A self-organization learning algorithm for visuo-motor coordination in unstructured environments

In this paper, we propose a learning algorithm for coordinating a robot system where the movement of an arm is controlled through a stereo camera system. Instead of calibrating the usually complex non-linear transformation between the arm and cameras, the algorithm decomposes the whole transformation automatically into local linear transformations and then makes the linearization map recorded by the arm controller. The linearization is carried out by a learning process based on a Kohonen-style self-organization network. To deal with unstructured environments in which some obstacles exist, some virtual forces are introduced for dealing with the high degree of complexity underlying in the transformation. This work was presented, in part, at the International Symposium on Artificial Life and Robotics, Oita, Japan, February 18–20, 1996     

自适应有限元不同网格间力学结果传递方法及程序实现

对于依赖于加载历史的自适应有限元分析问题,不同网格间力学结果的传递过程起着重要作用。基于按距离加权平均的改进插值方法,研究分步加载时自适应有限元不同网格间力学结果的继承问题。为使传递结果合理并减小计算工作量,插值方法采取选择邻近数据点、考虑方向影响、适当提高结果场的光滑性并使其通过全部已知数据点等措施;针对开挖过程中结构介质不断改变、开挖工作面不断移动及不同开挖步引入的介质之间场变量不连续等特点,采取分区划分网格并插值方式,构造不同网格间应力及位移结果的传递过程。所述传递过程,能为自适应有限元模拟多步骤开挖及弹塑性增量荷载分析等各种分步加载计算问题的解决提供有利条件。最后,给出2个算例以验证传递过程的可靠性。按增量荷载初应力方法对厚壁筒弹塑性分析表明,其结果与理论解吻合;模拟多步开挖的工程实例计算结果亦展示出所述传递方法的有效性。     

文安洼蓄滞洪区洪水风险图编制技术

洪水风险图是一种融合了地理、社会经济信息、洪水特征等信息的专题地图,采用了Acrgis（地理信息系统）、SQL数据库等先进技术,可广泛应用于防洪减灾、洪水保险、各种发展规划、灾害评估等诸多方面。文安洼是海河流域防洪体系的重要组成部分,是全国重点蓄滞洪区之一,编制文安洼蓄滞洪区风险图对蓄滞洪区防汛减灾、发展规划等可以起到重要的指导作用。该文对风险图编制中的技术经验进行了总结,以为今后工作提供借鉴。     

对象映射关系型数据库技术研究

Object Relationship Mapping(简称ORMapping)是将数据库表映射为面向对象系统中的类,表中的每一条记录则对应为该类的一个具体对象的技术。通过这种技术,可以在软件开发的过程中采用面向对象的方式来处理与数据库相关的部分,比如记录的增加、修改、删除等。讨论了实现OKMapping的几个关键性技术要点,数据库表字段映射对象属性,数据库操作映射面向对象操作,数据库主键外键关联映射对象之间的关系,映射对象如何来适应表结构的变化,事务管理。讨论了ORMapping的性能问题。     

基于黎曼流形的图像投影配准算法

提出了基于黎曼流形的图像投影配准优化方法, 根据投影变换的特点, 用SL(3)表征目标的图像投影变换, 研究SL(3)的几何结构, 通过变分的方法求出了SL(3)上的测地线, 给出相应的黎曼指数映射, 设计了一种新的基于SL(3)群上黎曼分析的平面投影配准算法, 分析了算法的优点, 并对其收敛性做出了证明. 模拟图像数据和真实图像序列测试的对比实验结果表明, 本文算法在效率和精度上较现有文献中基于欧氏空间的图像投影配准算法有显著提高, 优于基于李群的图像配准算法.     

大豆叶子中大豆皂甙总配糖体的分离纯化研究

在大豆叶子中大豆皂甙总配糖体提取工艺的基础上,进一步对总配糖体进行了分离纯化研究,主要研究了大豆皂甙总配糖体的脱色澄清、萃取以及萃取后得到大豆皂甙总配糖体的柱分离精制,从而得到了大豆皂甙分离纯化最佳的工艺条件.     

Quantitative luminescence mapping of Cu(In,Ga)Se2 thin‐film solar cells

We investigate photoluminescence and electroluminescence (PL and EL) emission images from Cu(In,Ga)Se₂‐based solar cells by means of a Hyperspectral Imager. Using the generalized Planck's law, maps of the effective quasi‐Fermi level splitting Δμ_eff in absolute values are obtained. A good agreement is found between the spatially averaged splitting in PL and the global open‐circuit voltage. However, from a local carrier transport discussion, we conclude that the equality does not hold locally. The spatial variations are rather attributed to local depth variations of the quasi‐Fermi level splitting due to material properties spatial fluctuations. By comparing PL and EL emissions, we discuss qualitatively the local effective lifetimes and collection efficiencies. Copyright © 2014 John Wiley & Sons, Ltd.     

面向状态检修的智能变电站二次设备公共信息模型扩展研究

智能变电站的新特点和新变化对智能站继电保护状态检修提出了新要求,智能变电站二次设备公共信息模型是建设新型智能变电站继电保护状态检修的基础。IEC 61970和IEC 61968公共信息模型(CIM)不能为智能变电站继电保护状态检修提供全面的公共信息模型支撑。基于IEC 61970和IEC 61968的CIM基本扩展原则,通过分析继电保护装置物理结构分层以及智能变电站保护控制系统通过网络化二次回路进行信息交互的新架构,扩展了智能变电站继电保护二次设备资源公共信息模型和继电保护二次设备资产公共信息模型。提出了基于IEC 61850的变电站二次设备状态信息模型到智能变电站继电保护二次设备量测模型的模型映射方案,构建了完整的智能变电站继电保护二次设备公共信息模型架构,为智能变电站继电保护状态检修的应用和二次运维管理系统信息的集成和交互奠定了基础。