2014年美国大学生数学建模竞赛官方原版特等奖论文，共19篇，欢迎下载，这是当年参赛前通过其他渠道购买的，之前定价比较高，调整价格需要超过50字，所以说这些废话。
2019-12-21 20:44:04
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The traditional communication methods of high frequency (HF) radio are still widely used worldwide,
which has longer propagation distance than other kinds of radio communication systems, and can cover
mountainous, deserts and oceans. At present, the studyof high frequency radio multi-hop propagation mode
has been relatively systematic, which provide various methods to simulate its trajectory and attenuation in
the air, ionosphere and earth surface. In this paper, we mainly focus on the reflection properties on the ocean
surface, including calm and turbulent conditions. What’s more, the overall propagation process and practical
application of HF radio are also involved.
2019-12-21 20:35:53
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android的NFC应用源代码(google全国应用大赛二等奖源码分享学习，内有注释，
2019-12-21 20:31:44
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