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The possibility of recovering vehicle kinetic energy is one inherent advantage of hybrid electric vehicle (HEV). Due to the introduction of electric regenerative braking, the structure, design and control of a hybrid electric vehicle is quite different from the pure mechanical braking of conventional vehicles. In this paper, the decelerations of the vehicle in typical urban driving cycles and the influences of regenerative braking have been investigated. The results provide strong supports to the design of the braking force distribution strategy for the hybrid electric vehicle. This paper designs a deceleration sensitive braking force distribution strategy to distribute the desired total braking force to the front and rear axles. This strategy can recovery more braking energy and can keep the vehicle more stable while the vehicle is braked. The proposed distribution strategy is tested through the simulation, and the simulation results show the distribution strategy is effective. Keywords-HEV; Braking force distribution; regenerative braking; hybrid braking system; motor brakingI.

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Purpose: The Healthy Cities Project is an important strategy for global health. This study aimed to develop a scientific and appropriate indicator system for the evaluation of a Healthy City in Chongqing, China. Methods: Data were collected via a review of government documents, focus group discussions, and in-depth interviews. A total of 34 government documents were reviewed to build the indicator database based on our previous studies. The first round of focus group discussions, which involved eight health-related experts, was conducted to form the indicator system framework. In-depth interviews with 15 experts from government departments were conducted to design the improved indicator system. The second round of focus group discussions, which featured four experts, was conducted to obtain the final recommended list of indicators. A thematic framework was used to analyze the detailed interview notes. Results: The indicator system for the Healthy City consisted of 5 first-level indicators, 21 second-level indicators (e.g., health literacy), 73 third-level indicators (e.g., incidence of myopia), and three characteristic indicators. This indicator system spanned the scope of the environment, society, health services, healthy people, and health behaviors. Conclusion: This indicator system was based on the current status of the construction of the Healthy City in the pilot district. The indicator system could be dynamically adjusted according to the development of the Healthy City in the pilot district. Government departments play an important decision-making role in the development process of this indicator system.

Whole vehicle systemSignal processingAbstract-In this paper, an integrated vehicle dynamics control system is designed to improve vehicle handling and stability by coordinating control of Active Front Steering (AFS) and Electronic Stability Program (ESP). The integrated control system includes a coordinated controller in upper layer and two subsystem controllers in lower layer. The control algorithm based on E E phase plane is used to identify the driving situations. And a coordinated control rule based on integrated scheme is employed to determine and allocate the control tasks between the two subsystems. The simulation results show that the proposed control strategy is able to enhance the tracking performance of the reference yaw rate and improve the driving steer-ability of the vehicle.