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Summary: In this article, aiming at the problems of stochastic disturbance and iron losses for the position tracking of permanent magnet synchronous motors (PMSMs), a finite‐time adaptive fuzzy command filter control (CFC) method is proposed. First, the fuzzy control method is applied to dispose of the stochastic nonlinear function in the motor model. Second, the problem of "explosion of complexity" in backstepping control is solved by using CFC technology, and the compensation signal is introduced to eliminate filtering error. Moreover, the finite‐time control method is applied to the stochastic nonlinear system of PMSMs to improve the convergence speed of the system, tracking accuracy, and anti‐interference ability. At last, the simulation results are given to verify the method can achieve fast tracking of the desired signal. [ABSTRACT FROM AUTHOR]

Pars plana vitrectomy plays an important role in treating serious ophthalmic diseases, which requires subsequent substitution of the natural vitreous. However, the current substitutes are known for the drawbacks in instability, toxicity, and injection‐induced fragmentation, so there is a very urgent need in novel artificial vitreous substitute for clinical practice. In this study, DNA supramolecular hydrogel is evaluated as a potential artificial vitreous substitute. It is observed that DNA supramolecular hydrogel exhibits relatively strong mechanical strength, shear‐thinning behavior, rapid recoverability, and other physical properties similar to the human vitreous body. The in vivo experiments further prove the injectability, excellent biocompatibility, and in vivo stability. With the support of the DNA supramolecular hydrogel, the morphology and basic functions of the operated eyes are well recovered without obvious inflammation, which demonstrate the DNA supramolecular hydrogel shows enormous potential as vitreous substitute. [ABSTRACT FROM AUTHOR]