Cheng Zhang

The battery management system (BMS) optimizes the efficiency of batteries under allowable conditions and prevents serious failure modes. This book focuses on critical BMS techniques, such as battery modeling; estimation methods for state of charge, state of power and state of health; battery charging strategies; active and passive balancing methods; and thermal management strategies during the entire lifecycle. It also introduces functional safety and security-related design for BMS, and discusses potential future technologies, like digital twin technology.

The battery management system (BMS) optimizes the efficiency of batteries under allowable conditions and prevents serious failure modes. This book focuses on critical BMS techniques, such as battery modeling; estimation methods for state of charge, state of power and state of health; battery charging strategies; active and passive balancing methods; and thermal management strategies during the entire lifecycle. It also introduces functional safety and security-related design for BMS, and discusses potential future technologies, like digital twin technology.

This book recounts the elections in 2012 from different perspectives, one from an ordinary voter, one from an election researcher and one from a redistricting insider. Many officials, representatives and senators are elected from their districts. "One person one vote principle" dictates that the election districts should be redrawn every ten years after the census. During the redistricting, in order to win an upper hand over the opponents, partisan gerrymandering is quite popular with packing and cracking tricks. Whoever wins in redistricting wins the elections for the next ten years. In many cases, the election outcomes are decided before the election starts. Redistricting transforms the ideal of "people electing their representatives" to the reality of "representatives choosing their constituents".

This book recounts author's experiences as a graduate student, a state employee, an interpreter in a prison, a juror in the court, a researcher on the homeless and substance addicts, a volunteer of income tax assistance, a part-time teacher in a Chinese school, a background actor in Hollywood films, an expert witness in the court, etc. The book reveals how the government operates and how the ordinary people live, and analyzes the American society.