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Background Since the comprehensive implementation of the contracted family doctor service in 2016, the willingness of residents to have their first contact in primary care has gradually increased, but the effectiveness evaluation of contracted residents' first contact in primary care needs to be further explored. Objective To understand the current status of contracted residents' first contact evaluation, explore its influencing factors and propose improvement strategies. Methods A multi-stage stratified random sampling method was used to select 54 community health service institutions/township health centers in three cities in Shandong Province, with a total of 4 000 contracted residents. The first contact dimension questionnaire of the Chinese version of the Primary Care Quality Assessment Scale (PCAT) was used to conduct the survey, comparing the first contact dimension scores of contracted residents with different characteristics and using multiple linear regression to analyse the factors affecting the first contact evaluation of contracted residents. Results A total of 3 859 valid questionnaires were collected, with the effective recovery rate of 96.48%. Among them, 2 086 (54.1%) were residents of township health centers and 1 773 (45.9%) were residents of community health centers; the total score of the first contact dimension in the three regions was 3.49, with the highest score being "Is your contracted institution open on Saturdays and Sundays?" (3.74) ; the item with the lowest score was "During non-business hours, if you were sick at night, would your contracted facility have a doctor or nurse available?" (3.05). The results of the multiple linear regression analysis showed that the contracted facility, personal monthly income, education level, marital status, occupation, physical health and diagnosis of chronic disease were the factors influencing the scores of the first contact dimension of contracted residents (P

Most calibration systems developed in our country for now are based on the CAN calibration protocol(CCP), which is specially designed for the CAN bus, and thus has poor compatibility and expansibility for other buses. However, the protocol layer of the universal measurement and calibration protocol(XCP) is independent from any specific physical transport layer. Based on that, a multi-bus supported ECU calibration system is implemented, which is in accordance with the widely accepted industry norms of measurement, calibration and diagnostic system made by association for standardization of automation and measuring system(ASAM-MCD). The XCP driver is developed in both master and slave nodes, and XCP transport layers for CAN and FlexRay are designed respectively on the basis of the same protocol layer, so that the system is suitable for both the mature CAN bus and the promising FlexRay bus. The system is tested through measurement and calibration experiments, and the results demonstrate that it satisfies the requirements well.

A MPC5554-based hybrid control unit (HCU) is developed for a series-parallel hybrid electric bus ( SPHEB) in this paper. Firstly considering the operation features and powertrain configuration of SPHEB with minimizing fuel consumption as objective, a real-time optimal energy management strategy (EMS) based on iterative dynamic programming global optimization algorithm and Elman dynamic neural network is proposed. Then according to the vehicle requirements and EMS, the hardware system of HCU is designed with MPC5554 as CPU. Finally HCU hardware-in-the-loop simulation test is conducted with ETAS PT-LABCAR as platform. The results demonstrate that the developed HCU operates stable and reliable and can effectively realize real-time control for the SPHEB, significantly improving the fuel economy of the vehicle. [ABSTRACT FROM AUTHOR]

In view of the problem of power batteries being frequently charged and discharged at large power in hybrid electric vehicle, the battery/ultra-capacitor hybrid energy storage system (B/UC HESS ) is adopted, which takes advantage of the high power characteristics of ultra-capacitor to improve the performance of storage system. In this paper, two schemes of B/UC HESS are studied: direct battery/ultra-capacitor parallel connection and active battery/ultra-capacitor parallel connection, in which the latter uses DC-DC convertor with zero current transition soft switching as interface to connect battery and ultra-capacitor. The dynamic model for the DC-DC convertor and the models for battery and ultra-capacitor are set up with Matlab simulink and a simulation is conducted with AVL Cruise. The results indicate that the direct parallel scheme doesn't take full use of the capability of ultra-capacitor, while with the active parallel scheme the peak current of battery lowers in pure electric driving and regenerative braking conditions, the variation range of battery end voltage reduces, with an energy efficiency 14. 92 % higher than that of sole battery energy storage system. In addition, its dynamic response performance also improves due to the use of fuzzy PID control algorithm. [ABSTRACT FROM AUTHOR]