Minimal Query Algorithm of XML Document Based on Unconstrained Tree Pattern

2012 ◽  
Vol 430-432 ◽  
pp. 1677-1681
Author(s):  
Hua Bei Nie ◽  
Yi Wang
Keyword(s):  
Tree Structure ◽  
Two Dimensional ◽  
Structure Model ◽  
Document Structure ◽  
Tree Pattern ◽  
Xml Document ◽  
Query Tree ◽  
Query Algorithm ◽  
Query Patterns ◽  
Relational Table

XML document structure uses the tree structure to express the document structure model that is different from the traditional two-dimensional relational table structure and XML query patterns mainly for tree query. Tree pattern always divided into constrained type and unconstrained type. This paper based on unconstrained tree pattern query, provide a mini algorithm of unconstrained tree pattern query, and prove the correctness of algorithm theoretically.

Space-Optimized Tree: A Connection+Enclosure Approach for the Visualization of Large Hierarchies

2003 ◽  
Vol 2 (1) ◽  
pp. 3-15 ◽  
Author(s):  
Quang Vinh Nguyen ◽  
Mao Lin Huang
Keyword(s):  
Hierarchical Structure ◽  
Dimensional Space ◽  
Tree Structure ◽  
Relational Data ◽  
Two Dimensional ◽  
Approach Space ◽  
Link Diagram ◽  
New Approach ◽  
Semantic Zooming ◽  
Tree Visualization

This paper describes a new approach, space-optimized tree, for the visualization and navigation of tree-structured relational data. This technique can be used especially for the display of very large hierarchies in a two-dimensional space. We discuss the advantages and limitations of current techniques of tree visualization. Our strategy is to optimize the drawing of trees in a geometrical plane and maximize the utilization of display space by allowing more nodes and links to be displayed at a limited screen resolution. Space-optimized tree is a connection+ enclosure visualization approach that recursively positions children of a subtree into polygon areas and still uses a node–link diagram to present the entire hierarchical structure. To be able to handle the navigation of large hierarchies, we use a new hybrid viewing technique that combines two viewing methods, the modified semantic zooming and a focus+ context technique. While the semantic zooming technique can enlarge a particular viewing area by filtering out the rest of tree structure from the visualization, the focus+context technique allows the user to interactively focus, view and browse the entire visual structure with a reasonable high-density display.

Simplified Calculation of Temperature Stress of Cast Plate in Frame Structure

2010 ◽  
Vol 163-167 ◽  
pp. 1296-1299
Author(s):  
De Zhi Liang ◽  
Yu Xin Song
Keyword(s):  
Temperature Stress ◽  
Shear Wall ◽  
Frame Structure ◽  
Wall Structure ◽  
Two Dimensional ◽  
Structure Model ◽  
Single Frame ◽  
Simplified Calculation ◽  
The Impact ◽  
Cast Plate

The impact of temperature stress cannot be ignored in actual project. Single-frame shear wall structure of two-dimensional plane has been simplified in this paper. Fixed point of displacement under the influence of the temperature is determined in structure. Model for Calculating is given. Temperature stress of frame - shear wall cast plate is found by matrix method.

scholarly journals Evaluation of a simple fruit tree structural model

2009 ◽  
Vol 15 (1-2) ◽  
Author(s):  
Z. Láng
Keyword(s):  
Structural Model ◽  
Fruit Tree ◽  
Tree Structure ◽  
Spring Constant ◽  
Structure Model ◽  
Tree Model ◽  
Machine Model ◽  
Similar Frequency ◽  
Coefficient Of Elasticity ◽  
The Right

A simple three element tree structure model of Lang, 2006 was tested in plum orchard using two different inertia fruit tree shakers. The first was a slider crank type one; the second had rotating eccentric weights. The parameters of both were chosen to give similar frequency and amplitude output in average orchard conditions. Orchard experiments were carried out shaking the trees with both machines at several frequencies and shaking heights. The measured acceleration and amplitude values were plotted on diagrams together with the calculated acceleration and amplitude curves of the fruit tree-shaker machine model. Choosing the right fruit tree parameters, such as apparent spring constant, damping coefficient, reduced trunk mass and coefficient of elasticity of the trunk the measured and calculated values coincided well. This proves the ability of the fruit tree model for optimising the shaker parameters to any given orchard.

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