Lev Yastrebov

我创建了基于海图数据的三维海底建模算法. 海图是导航数据的独特来源，因为它具有最好的海洋覆盖范围. However, 使用原始图表数据构建三角曲面几乎是无用的，因为图表已经简化了, only essential bathymetry data. Thus, the surface will have large, flat areas. So, I read a lot of scientific articles about surface interpolating methods, tested them, and picked the most suitable ones.

Another big problem was physical conflicts in the chart data. For example, one chart point can have three levels. To overcome this, 我开发了一种特殊的方法来解决冲突，并且不会与图表数据产生冲突.

Moreover, I added the self-testing mode to check and adjust the algorithm. My testing tool picked charts with different levels of detail in the same area, ran my algorithm on less detail, and then compared the results with a more detailed chart.

As a result, 我的算法可以将不同等深线的海图连接起来，从而创建一个无缝的海洋模型, which is used for automatic routing for ships. Also, it is helpful in oceanography, hydrology, fishing, and other applications.

I developed an example of a fully functional web API with users, roles, authentication, integration with another API, and a lot of tests. I also set up a CI pipeline, which builds and runs all the tests, including the tests against the real database.

Using this application, users can create an account, log in, and store some food records to track sugar consumption. 如果用户没有提供糖量，应用程序将从营养数据提供商处获取. 此外，用户还可以访问API来检查他们当天吃了多少糖.

我制作这个教育项目是为了展示如何在不使用ASP等成熟技术的情况下构建自定义轻量级身份验证和授权.NET Core Identity以及如何将不同的东西集成到一个可靠的应用程序中.

The interval map is a data structure that associates intervals of keys with values, where the key can be any comparable type with a defined lowest limit, and the value can be anything checkable for equality.

I developed an extremely efficient algorithm for assigning values; it uses only two relatively expensive O(log N) operations to find range bounds. It utilizes precise iterator arithmetic to locate all other positions.

在这种情况下，仔细测试这个算法以确保它正常工作是非常重要的. To accomplish that, 我使用了测试驱动开发和基于属性的测试，而不是基于示例的测试. 这意味着在执行操作后检查测试对象是否具有特定属性，而不是将结果数据与示例进行比较. 这种技术使得编写清晰、简洁的测试以涵盖所有可能的数据变化变得容易.
Finally, I successfully built a complex, efficient algorithm that works correctly.