共查询到19条相似文献,搜索用时 109 毫秒
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LI Yongjie 《电脑编程技巧与维护》2008,(14)
本文介绍了如何扩展数据结构来支持更多的应用操作。通过扩展红-黑树,分析了动态地维护集合中关键字的次序统计,同时,概括了扩展数据结构的方法和步骤。 相似文献
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本文叙述基于顺序语言MODULA-2的并行扩展语言MODULA-S,对它的设计目标及其扩展的并行结构成份进行了讨论。该语言已在面向数据结构的小巨型机STARLET-Ⅱ上实现。 相似文献
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探讨了如何将数据结构中广义表进行扩展 ,并利用这个扩展广义表来设计逻辑表达式在计算机上的逻辑结构和存储结构 ,以及在这种结构上如何实现逻辑表达式的基本运算 ,进而实现其它复杂的表达式自动推导 相似文献
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本文设计了一个特殊的数据结构,并使用了一些特殊技巧用于扩展内存的管理,从而简化了在 D O S模式下的 C语言编程。 相似文献
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从无线传感器网络路由协议的数据结构重用出发,按照异协议同功能数据结构、异协议异功能数据结构及同协议异功能数据结构重用原则,提出一种无线传感器网络可重用可切换路由协议框架,包括重用结构模型、维护模型、控制模型、配置服务模型和其它服务模型5个模型,共同完成路由协议的结构重用、不同路由自主切换功能,既能够节省节点内存空间又方便路由设计的扩展。 相似文献
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阐述了RTL中间代码生成的基本原理,给出了主要数据结构和扩展二元操作,RTL代码的算法和流程,以加深对机器描述及RTL表示机制的理解。 相似文献
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基于快速索引的虚拟现实三维引擎的设计及应用 总被引:1,自引:0,他引:1
该文提出一种基于索引的三维引擎数据结构的内核。这种数据结构以模型为构造单元,能快速地建立三维顶点坐标数组,并分别将同一模型单元的顶点坐标组织成适合OpenGL高速渲染的三角形列表或三角形条(TriangleStrips)。该数据结构易于扩展,可以容纳纹理坐标、法向量和模型变换矩阵,可以添加、变换和删除模型,具有很大的灵活性;同时,它在容纳海量数据时,也能够提高OpenGL渲染速度。 相似文献
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《IEEE transactions on pattern analysis and machine intelligence》1979,(4):333-340
The multidimensional binary search tree (abbreviated k-d tree) is a data structure for storing multikey records. This structure has been used to solve a number of "geometric" problems in statistics and data analysis. The purposes of this paper are to cast k-d trees in a database framework, to collect the results on k-d trees that have appeared since the structure was introduced, and to show how the basic data structure can be modified to facilitate implementation in large (and very large) databases. 相似文献
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《Automatica》2013,49(6):1566-1575
Knowledge of the noise distribution is typically crucial for the state estimation of general state-space models. However, properties of the noise process are often unknown in the majority of practical applications. The distribution of the noise may also be non-stationary or state dependent and that prevents the use of off-line tuning methods. For linear Gaussian models, Adaptive Kalman filters (AKF) estimate unknown parameters in the noise distributions jointly with the state. For nonlinear models, we provide a Bayesian solution for the estimation of the noise distributions in the exponential family, leading to a marginalized adaptive particle filter (MAPF) where the noise parameters are updated using finite dimensional sufficient statistics for each particle. The time evolution model for the noise parameters is defined implicitly as a Kullback–Leibler norm constraint on the time variability, leading to an exponential forgetting mechanism operating on the sufficient statistics. Many existing methods are based on the standard approach of augmenting the state with the unknown variables and attempting to solve the resulting filtering problem. The MAPF is significantly more computationally efficient than a comparable particle filter that runs on the full augmented state. Further, the MAPF can handle sensor and actuator offsets as unknown means in the noise distributions, avoiding the standard approach of augmenting the state with such offsets. We illustrate the MAPF on first a standard example, and then on a tire radius estimation problem on real data. 相似文献
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分析了基于RFID技术的矿井物流管理系统的工作原理,确定了该系统的功能需求,即基本数据管理、物流业务管理、物流运输监控、数据统计;详细介绍了系统中数据库概念结构、逻辑结构、关键数据处理、安全性及基于RFID技术的运输车辆电子标签编码的设计实现。实际应用表明,该数据库具有良好的存储结构、数据共享性和一致性。 相似文献
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前缀立方在浓缩数据立方的基础上利用前缀共享和基本单元组技术有效地缩小了数据立方的尺寸.由于前缀共享产生的分组结构,浓缩数据立方的索引CuboidTree并不适合前缀立方.所以,根据前缀立方包含分组结构的特性,结合BUB-Tree和R-Tree技术对CuboidTree进行改造,最终得到了一种新的索引机制Bound-CuboidTree.实验证明,这种索引机制比已有的前缀立方索引Prefix-CuboidTree更适合前缀立方的结构. 相似文献
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Extended stigmergy in collective construction 总被引:1,自引:0,他引:1
We've described a scheme by which a swarm of robots can automatically assemble solid structures of square building blocks in two dimensions according to a high-level user-specified design. We discuss the use of extended stigmergy: augmenting the basic notion of stigmergy by increasing the capabilities of environmental elements. In this construction setting, the elements are the building blocks, the basic information they carry is the simple fact of their presence at a location, and extensions include cases where they can store additional information, perform computations, and/or communicate with physically attached neighbors. Benefits can include increased robustness and faster completion of a desired structure. We review three variants of that construction scheme that use extended stigmergy to different degrees. We focus on analysis of the algorithms and their comparative performance, mainly theoretical but also through simulation experiments. 相似文献
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网络统计是基于网络的数据收集、处理、传输、分析与统计的计算活动,具有海量数据处理、分布计算、协同分析与统计等特点。网络统计的核心问题之一是如何实现网上各统计单元对统计任务的沟通与理解。针对这一问题,提出了基于CORBA的网络统系统结构,并对网络统计单元进行了形式化描述。 相似文献