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Article analysis:

The article is generally reliable and trustworthy, as it provides detailed information on the topic of nonlinear piezoelectric energy harvesting and presents two high-precision magnetic force formulas for cylindrical and cuboidal magnets to reduce the error in the previous theoretical analysis. The article also cites relevant research papers to support its claims, which adds to its credibility.

However, there are some potential biases that should be noted. For example, the article does not explore any counterarguments or present both sides of the argument equally; instead, it focuses solely on presenting one side of the argument in favor of nonlinear PEHs. Additionally, while it does cite relevant research papers to support its claims, it does not provide any evidence for these claims or explore any possible risks associated with this technology. Furthermore, some of the language used in the article could be seen as promotional content that is biased towards nonlinear PEHs rather than providing an unbiased overview of both sides of the argument.

In conclusion, while this article is generally reliable and trustworthy due to its detailed information on nonlinear piezoelectric energy harvesting and citing relevant research papers to support its claims, there are some potential biases that should be noted such as lack of exploration into counterarguments or risks associated with this technology and promotional content that is biased towards nonlinear PEHs rather than providing an unbiased overview of both sides of the argument.