In this article, four different matching network will be introduce and their value in network will be given by hand calculating and computer analysis. In the first matching network we just use inductor. In the second matching network, we just use a simple LC matching network with up-converting to match a 1Ω to 50Ω. As we have learnt how to calculate the quality factor of up-converting network and the equation between quality factor, capacitor and inductor, we can easily calculate the value of them. The third matching network is the one stage lump line matching, which means we can just use the LC group to take the place of a single impedance matching. In this matching, as it only has one stage, it is called narrow band matching because it cannot offer a wide band. The last matching network is about the wide band matching network, because this lump line network have 5-stage, which means it can offer a large bandwidth. The concrete calculation of value in network will be given in appendix

Cryptocurrencies have been a massive surge since last decade leads to blockchain technology steps in epical milestone. Blockchain is a distributed database that is shared among the nodes of a computer network. Bitcoin, as a critical role in cryptocurrency system is known as a typical blockchain, maintaining a secure and decentralized record of transactions. The value and advantage of blockchain technology has been acknowledged by the public and applied in difference areas. The defect of blockchain technology is gradually revealed. Excessively wasting electricity have severely affect the utilities usage in many countries. Therefore, DRD Memory Mining is developed to solve the defects. This article illustrates the algorithm of DRD Memory Mining and how the memory consensus mechanism works.

this article is aimed to design two impedances matching network to let the source degeneration and common gate amplifier to achieve the ideal characteristic. In the source degeneration case as the resistance is so small, so we just use down converting matching network. As the source degeneration gives us a high resistance , we just match with a up converting network.