The phrase "by two methods of" is correct and can be used in written English.
It is commonly used to indicate that there are two different ways or approaches that can be used to accomplish something. Example: The data were analyzed by two methods of statistical analysis to ensure accuracy.
Their diagnostic values were evaluated by two methods of indirect ELISA and dot blot analysis.
Isobutylcyanoacrylate has been used to form nanoparticles in presence of polysaccharides by two methods of polymerization.
The musical noise is generated by two methods of integrating microphone array signal processing and spectral subtraction.
The developed single method is capable of separating all known impurities, which are quantified by two methods of USP.
We conduct an objective analysis on musical noise generated by two methods of integrating microphone array signal processing and spectral subtraction.
The out-of-plane angles of fracture initiation have been measured by two methods of photography and optical CMM (Coordinate Measuring Machine).
Microbial populations were monitored by both microscopic and by three methods of molecular analyses.
The three-axis angle components can be calculated by three methods of using different diffraction light spots reflected from the diffraction grating.
In this paper, we utilized whole genome sequencing and sequence-based karyotyping to assess the bias induced by four methods of whole genome amplification.
The trafficking process in Nepal, as identified by Hennink and Simkhada (5), is characterized by four methods of trafficking: through brokers, independent migration to urban areas, deception or false marriage, and force/abduction.
By one method of calculation, that could have meant losses for North Carolina of around $10 million on their swaps.
