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Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

针对连续空间中无法直接采用图论方法进行路径分析的问题，提出了基于四叉树思想构建的变分辨栅格模型.该模型不仅兼顾了地形表达精度与数据冗余度，而且避免了地物“边缘效应”的影响.在该模型基础上，设计了一种启发式有向搜索算法，该算法在搜索节点时，首先对相邻节点进行方向性选择，减少搜索空间，提高了算法的效率.实验结果表明，提出的模型及算法不仅能够求得连续空间中的最优路径，而且具有较高的计算效率.

Copyright of Shipin Kexue/ Food Science is the property of Food Science Editorial Department and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)