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Inconsistencies exist in the expressions for sensorless speed estimation of DC motors in various papers. These inconsistencies have propagated through the literature and continue to do so. Starting from the electromagnetic principles, this study is specifically devoted to deriving the correct expression for sensorless speed estimation of DC motors. The(More)
Volatile organic compounds (VOCs) were measured by two online instruments (GC-FID/MS and PTR-MS) at a receptor site on Changdao Island (37.99 N, 120.70 E) in eastern China. Reaction with OH radical dominated chemical losses of most VOC species during the Changdao campaign. A photochemical-age-based parameterization method is used to calculate VOC emission(More)
Advance of high-speed deep-submicron VLSI technology requires chip interconnect and packaging to be modeled by distributed circuits. Such a detailed modeling level eventually results in large scale linear circuits to be analyzed. Here, even distributed RC interconnect models and their closed-forms are discussed and presented. The obvious advantage is to(More)
This paper presents state space closed forms and transfer function recursive algorithms for evenly distributed RC interconnect models and their even length-order (ELO) model reduction. The closed-forms have a computation complexity O(1). The characteristics of the ELO model simplification to its original model are revealed. It is shown that extremely(More)
B. Wang, M. Shao, S. H. Lu, B. Yuan, Y. Zhao, M. Wang, S. Q. Zhang, and D. Wu The State Joint Key Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China Received: 8 February 2010 – Accepted: 14 February 2010 – Published: 25 February 2010 Correspondence to: M.(More)
Oxygenated volatile organic compounds (OVOCs) are important products of the photo-oxidation of hydrocarbons. They influence the oxidizing capacity and the ozoneforming potential of the atmosphere. In the summer of 2008, 2 months of emission restrictions were enforced in Beijing to improve air quality during the Olympic Games. Observational evidence reported(More)
Non-methane hydrocarbons (NMHCs) play a critical role in the photochemical production of ozone (O3) and organic aerosols. Obtaining an accurate understanding on temporal trends of NMHC emissions is essential for predicting air quality changes and evaluating the effectiveness of current control measures. In this study, we evaluated temporal trends of(More)
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