Mingrui Leng’s research while affiliated with Southwest Jiaotong University and other places

... For example, in the process of burning coal, a lot of dust will be produced, which has a great impact on the air. Although my country has taken various countermeasures to control the increasing area of acid rain to a certain extent, acid rain in some areas is still increasing, and problems such as automobile exhaust pollution are becoming more and more prominent, especially in metropolises [5]- [8]. Air pollution has gradually turned into a mixture of smoke and exhaust gas. ...

Reference:

Overview of Quadratic DC-DC Converters

... They get rid of sub-harmonic oscillations [18]- [20]. A digital average voltage proposed by Liu et al [21] has rapid load response and no sub-harmonic oscillations but it can operate only with high valued capacitor ESR at the output. It doesn't provide over current protection. ...

Reference:

V C Digital Controlled DC DC Converter

... Considering the module implementation, the battery can't be large and thick so that its capacity is much limited. To sustain continuous monitoring of 8-h operation and control the system power budget, the power management unit, which consists of an RF-DC converter, a voltage limiter, a charger [32], an off-chip rechargeable button battery, a buck converter [33,34], and several low-dropout regulators (LDOs), is indispensable. The device is sealed in bio-compatible packaging for intraoral use, and thus is designed to harvest power wirelessly from the RF-DC converter, charging the battery through the on-chip charger. ...

Reference:

A Wireless Monitoring System Using a Tunneling Sensor Array in a Smart Oral Appliance for Sleep Apnea Treatment