In conventional direct torque controlled (DTC) permanent magnet synchronous motor drive,
there is usually undesired torque and flux ripple. The existing literature have proposed some …

High-performance piezoceramics are some of the most important and widely used materials,
and as such research into this topic is at the forefront of high-technology advanced materials…

Environment protection and human health concern is the driving force to eliminate the lead
from commercial piezoelectric materials. In 2004, Saito et al. [ Saito et al., Nature , 2004 , 432 …

Lead-based piezoelectric materials are currently facing global restrictions due to their lead
toxicity. Thus it is urgent to develop lead-free substitutes with high piezoelectricity and …

Because of growing environmental concerns, the development of lead-free piezoelectric
materials with enhanced properties has become of great interest. Here, we report a giant …

Background Although exposure to cigarette smoking and air pollution is common, the current
prevalence of chronic obstructive pulmonary disease (COPD) is unknown in the Chinese …

The elimination of lead in piezoelectric applications remains challenging. Since the
advances in the piezoelectricity were found in the perovskite family in 2000, studies into lead-free …

DOI: 10.1002/adma. 201601859 d33 of> 400 pC N− 1 by the modification of the
rhombohedral–tetragonal (R–T) phase boundary and domain structures.[8, 9] Rödel and Jo et al. …

The properties of nanoparticles and their increased use have raised concerns about their
possible harmful effects within the environment. Most studies on their effects have been in …

Background Asthma is a common chronic airway disease worldwide. Despite its large
population size, China has had no comprehensive study of the national prevalence, risk factors, …