Chlorocholine Perchlorate is an Organic Ferroelectric with Two-Step Ladder-like Dielectric, Second Harmonic Generation Effects, and Ferroelectricity.

The organic salt chlorocholine perchlorate [ClCH CH N(CH ) ⋅ClO ] (CCP) is found to be a molecular ferroelectric with a high theoretical spontaneous polarization (Ps) value up to 17.09 μC cm . CCP exhibits two successive order-disorder phase transition at 332 and 365 K with space groups changing from Cc to Cmc2 and then P6 /mmc, accompanied by unusual two-step ladder-like dielectric, SHG signal with obvious "on/off" contrasts.

Establishment of open web platform based on 3D head model for product adaptability analysis and evaluation.

With improved living conditions, the demand for wearable products has increased, particularly for headwear. Traditionally, the dimensions of headwear products are designed according to 1D anthropometric data, such as head length, width, and eye width. However, this design method, applied to fit the 3D human head, results in differences in adaptability, which affect the wearing comfort of the user.