基于关系结构的流程控制模型

深入讨论了工作流流程的起点模型、流程激活模型、流程运转模型以及终点模型。在传统的关系数据库的基础上，提出了一个适用于关键业务开发的基于关系结构的流程控制模型，说明了该模型目前的应用情况。     

A virtual centrifugal force based navigation algorithm for explorative robotic tasks in unknown environments

In many robotic tasks, there is no a priori knowledge of the environment. This makes it necessary for robots to explore the environment. Navigation algorithms for robots to map the environment completely in a short time play a very important role in the robotic task completion. A navigation algorithm based on virtual centrifugal force is proposed to complete the robotic exploration of the unknown environment using rang sensors in this paper. Collisions between a robot and an obstacle or between robots can be avoided with the application of the proposed navigation rules. The kinematics and dynamics equations of robots adopting the algorithm are also given. The simulation experiments demonstrate the operation of the algorithm. Several simulation experiments of various representative robotic tasks are carried out, based on the explorative navigation algorithm, which successfully validate the virtual centrifugal force based navigation algorithm.     

Morphological Pyramids in Multiresolution MIP Rendering of Large Volume Data: Survey and New Results

We survey and extend nonlinear signal decompositions based on morphological pyramids, and their application to multiresolution maximum intensity projection (MIP) volume rendering with progressive refinement and perfect reconstruction. The structure of the resulting multiresolution rendering algorithm is very similar to wavelet splatting. Several existing classes of pyramids are discussed, and their limitations indicated. To enhance the approximation quality of visualizations from reduced data (higher levels of the pyramid), two approaches are explored. First, a new class of morphological pyramids, involving connectivity enhancing operators, is considered. In the pyramidal analysis phase, a conditional dilation operator is used, with a given number n of iterations. The corresponding pyramids for n = 0 and n = 1 are known as the adjunction pyramid and Sun-Maragos pyramid, respectively. We show that the approximation quality when rendering from higher levels of the pyramid does increase as a function of the number of iterations n of the conditional dilation operator, but the improvement for n > 1 is limited. The second new approach, called streaming MIP-splatting, again starts from the adjunction pyramid. The new element is that detail coefficients of all levels are considered simultaneously and are resorted with respect to decreasing magnitude of a suitable error measure. All resorted coefficients are projected successively, until a desired accuracy of the resulting MIP image is obtained. We show that this method outperforms the previous methods based on morphological pyramids, both with respect to image quality with a fixed amount of detail data, and in terms of flexibility of controlling approximation error or computation time.Jos B.T.M. Roerdink received his M.Sc. (1979) in theoretical physics from the University of Nijmegen, the Netherlands. Following his Ph.D. (1983) from the University of Utrecht and a two-year position (1983–1985) as a Postdoctoral Fellow at the University of California, San Diego, both in the area of stochastic processes, he joined the Centre for Mathematics and Computer Science in Amsterdam. There he worked from 1986–1992 on image processing and tomographic reconstruction. He was appointed associate professor (1992) and full professor (2003), respectively, at the Institute for Mathematics and Computing Science of the University of Groningen, where he currently holds a chair in Scientific Visualization and Computer Graphics. His current research interests include morphological image processing, biomedical visualization, neuroimaging and bioinformatics.     

某宾馆空调风系统测试与分析

通过对青岛市某宾馆的空调风系统测试，分析其运行问题，并给出解决的建议，对类似空调系统运行问题可提供参考。     

冷却水压差在空调机组节能改造中的作用

本文理论分析并介绍了如何利用冷却水压差结合其它参数来判断冷却水泵配置是否合适，对整体降低中央空调冷却水系统的耗电量和设计、运行管理具有现实的指导意义。     

大规模网络管理中的任务分解与调度

集中式的管理模式和简单的基于移动agent的网络管理方法都已不能满足大型网络管理的需要,为此,在给出基于多agent的网络管理框架的基础上,提出了一种基于任务依赖关系的任务分解算法,把网络管理任务分解为具有不同优先级的子任务,处于同一优先层次的子任务可以并行执行,根据子任务的优先级产生结合网络管理特点的调度策略,理论分析和实验表明:在大规模网络管理中采用任务分解技术能够提高时间效率和减轻网络负载。     

协同项目多目标任务分配优化算法

在协同项目中，伙伴企业间的任务分配问题直接影响到项目的整体获益。针对这一问题，以费用最小和承担企业数最少为目标，并充分考虑了任务之间的紧密关联关系，提出了一个有效的任务分配启发式算法，并进行了实例验证，给出了对算法的评价。     

激光多普勒双光束横向测速技术研究

为了实现基于CWCO2激光的运动目标横向速度测量,使用双光束方式在室内进行了实验,得到了较清晰的多普勒频移信号,并对信号数据进行了滤波处理,以提高信噪比。计算出了运动目标速度并与实际速度进行了比较。结果表明,测得速度值与实际值相当接近。     

超高密度光存储技术

当光存储发展到HD—DVD时，其记录点尺寸已接近了传统光学记录的极限。突破这一存储极限，实现更高密度的存储成为目前新一代光存储技术的主要研究方向。关于这一研究，目前主要涉及三维体存储和近场光存储这两个方面。本文主要介绍了各种光存储技术的原理及其研究现状、分析了各自的优势和目前存在的主要问题。     

真三维立体显示静态成像技术研究

简述了二维立体显示的现状，分析了真三维立体显示静态成像技术的基本原理和成像空间材料选取的依据，给出了真三维立体显示系统的控制模型，最后以人体心脏为例实现了真三维立体显示静态成像的模拟，并列举了它在各领域中的应用。