在网格中，两种算法在资源共享时和资源独占时的性能优劣对比可能不同。
In grid computing, relative performance of two scheduling algorithms on sharing resources and exclusive resources may be different.
方法：对药品的传统交易方式、集中招投标交易方式和电子商务交易方式进行分析，并作优劣对比。
METHODS: The traditional drug trading mode, the public bidding mode and the electronic commerce (EC) mode were analyzed and compared regarding their merits and demerits.
通过对最优化标定法、双平面标定法、两步法等传统摄像机方法的具体分析，给出了各种方法的优劣对比；
By comparison and analysis of traditional camera calibration methods, both advantages and disadvantages of each camera calibration method are given in details.
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