Here are some tools and services you can use for scientific上网:

A VPN (Virtual Private Network) is a tool that allows you to access the internet without being blocked by your internet service provider (ISP) or other browsers. It encrypts your internet connection, making it appear as if you're connecting to a private network. This can be useful if you want to avoid ads, protect your privacy, or access content that you don't have access to otherwise. For scientific上网 or scientific research, you might want to use VPNs to block ads, access specific databases, or use tools that require a private network. It's important to note that using a VPN doesn't stop ads in real-time; it just encrypts your connection and makes it harder for your ISP to block you.

1. Google Search: Use Google's search engine for scientific research. It can help you access databases, simulations, and information from a wide range of fields.

2. Wolfram Alpha: A computational knowledge engine that can answer questions and provide information on a wide range of topics, including scientific subjects.

3. arXiv: An open-access repository of electronic preprints (manuscripts) in mathematics, physics, computer science, and other fields.

4. sci-fi.com: A website that provides access to scientific data and research from various fields, including biology, chemistry, and physics.

5. Open Science Framework (OSCF): A platform that provides tools for managing and sharing scientific data.

6. Inteligent Search (IntelNet): A search engine that allows you to find information in a single search session.

7. Vox: A scientific search engine that can search for information in various scientific fields.

8. SOS (Search Of Science): A search engine that can search for information in scientific fields.

9. Academic databases: Tools like JSTOR, ScienceDirect, and SpringerLink allow you to access scientific journals and publications.

10. ResearchGate: A platform for scientists to share their research and collaborate with others.

If you're concerned about blocked ads, you can try using tools like Vox or Academic Earth to find information without seeing ads.

Let me know if you'd like more specific recommendations!