Contactless conductivity detection has attained great attention in the last decade in capillary electrophoresis. But contactless conductivity detection is restricted by its sensitivity, how to improve detection sensitivity has become the key of contactless conductivity. In this paper a novel extended model for the detection cell consisting of a network of resistors and capacitors is proposed accor...Show More
How to protect the fresh water sources is one of the principal problems in the human society, and obviously the industrial sewerage is the main pollution source. However, some water quality monitoring systems based on WSN have been done; we found that the traditional WSN nods have a disadvantage of short-distance communication among the nods, which limits the application in monitoring the industri...Show More
This paper describes a closed-loop micro-machined accelerometer implemented in a bulk-micromachining technology with integrated CMOS circuit. The operational principle of accelerometer is detailed. We establish a mathematical model of closed-loop system to compare the performance with the open accelerometer. Electrostatic force is served as a negative feedback in closed-loop operating mode to impr...Show More
