路径

However, keywords can only represent the simple content, which easily dissever the relevancy of the content The deep-content representation and application are not developed, so semantic navigation is not satisfied at present. Time mechanism is a kind of navigation mechanisms that uses time for the signpost, and determines navigation route according to the time of occurrence.

时序机制指以时间为导航路标、根据事物发生的时间顺序确定访问路径的一种导航机制，主要应用于WWW信息空间中以时问顺序为线索组织信息的结构中；空间机制指依据对象间的空间关联，为用户指引路径，提供导航路标的机制，应用于具有空间特征的结构中；社会机制指利用先行者的经验、建议为后来者指引路径的行为，原来主要应用在推荐系统、协作系统中，目前已经在主流的信息检索系统中得到了应用，如在CNKl知识网络服务平台（CNS 5.0）中的应用。

Using the principle and method of matrix transformation, the matrix model of VRPTW is developed.(3) Through analyzing the time windows and distance matrix of the nodes, we construct a probability transferring matrix, which is used to produce the initial scheme of VRPTW.

以有时间窗的车辆路径问题的矩阵模型为基础，对客户点的时间窗和距离矩阵进行分析，构造了有时间窗的车辆路径问题的概率转移矩阵，并利用基于概率转移矩阵的初始化方案生成方法，产生有时间窗的车辆路径问题的初始化方案。

Considering the particularity of the road network and the demand of the shortest path algorithm for the road network information, a new method of representation and storage of the road network to enhance the real-timeness of the shortest path algorithm was proposed based on the basic idea of the dual graph representation to improve the forward star structure.

考虑实际道路网络的特殊性以及最短路径算法对路网信息的要求，运用对偶图法的基本思想对前向关联边结构进行了改进，提出了一种能够提高路径优化算法实时性的路网表达方法与数据存储结构，并用Dijkstra和A*最短路径算法进行了验证。

There are two main pathways of dust storm which are affected Beijing: North Path and North-west Path.

影响北京地区的沙尘暴路径主要是北方路径和西北路径。

Based on the concept of zero-path tracking in homotopy which is generalized into minimum of energy function path tracking and considering that different homotopy path has greater impacts on convergence speed, a new method is put forward——the non-line homotopic BP algorithm.

本文在将同伦论中的零点路径跟踪概念推广到对多层前馈神经网络能量函数极小点路径跟踪的基础上，注意到不同的同伦路径对收敛速度的影响，提出了一种改进算法——非线性同伦BP算法。

In this intermediate result the heuristic search was made according to the scene nodes connectivity properties. A path searching task management mechanism was also carried out to balance the processing time of each frame loop.

在这个中间结果中，根据场景地形的通用性属性，利用启发式搜索进行路径搜索，并在路径搜索中有效的任务调度机制优化渲染循环中的路径搜索性能。

For the first time, the multipath in linear combination of GPS carrier phase observation is discussed and their physical properties are derived.

首次研究了 GPS 组合相位观测值中的多路径效应。本文对宽巷和窄巷观测值中的多路径效应分别做了研究，用小波分析法进行了多路径效应的特性提取，并分析了它们的一些物理特性。

The system can receive data from the STEP-NC interpreter by using the resource model of the function block type database, then translate the receiving data into the data of function block format; the tool path generator can dynamically transfer the function block in the function block type database; it can also use the data of function block management resource to export DSP order; depending on VC to edit function database and Dynamic Linkable Library, we can connect the tool path generator with research platform, use the tool path generated from the tool path generator to drive the tool move.

结果 通过功能块类型库中的资源模型接收STEP-NC解释器解释的数据，并将接收的数据转化成功能块格式的数据；依据工艺规划好的加工工序，刀具路径生成器动态调用功能块类型库中的功能块；利用功能块处理资源提供的数据，输出DSP指令；依靠VC语言编辑函数库和动态链接库，将刀具路径生成器与实验平台建立关联，基于刀具路径生成器生成的刀具轨迹驱动机床刀具运动。

To easily form preconditional curvilinear paths within the trust region subproblem, we employ the stable Bunch-Parlett factorization method of symmetric matrices and use the unit lower triangular matrix as a preconditioner of the optimal path and modified gradient path.

使用对称矩阵的稳定Bunch-Parlett易于形成信赖域子问题的弧线路径，使用单位下三角矩阵作为最优路径和修正梯度路径的预条件因子。

In this paper, the choice of route logistics, logistics and distribution path selection main consideration is the path optimization problem.

本文研究物流配送路径的选择问题，物流配送路径的选择问题主要考虑的是路径的优化问题。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。