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Objective To understand the epidemiological characteristics of public health emergencies in Qinghai Province from 2009 to 2023, providing a basis for decision-making in the prevention and control of such events. Methods Data on incidents from 2009 to 2023 in Qinghai Province were collected and organized from the "Public Health Emergency Report Management Information System". Descriptive epidemiological methods were used to analyze the characteristics of these incidents. Results A total of 311 public health emergencies were reported in Qinghai Province from 2009 to 2023, with 9 099 cases of illness affecting a total of 480 213 individuals, resulting in 46 deaths. Join point analysis revealed a turning point in infectious disease incidents, with a statistically significant upward trend from 2012 to 2023 (P=0.001). In contrast, non-infectious disease incidents exhibited a notable downward trend, with an annual percentage change (APC) of -8.30% (95%C7: -14.91% to -2.86%, P=0.003). Global spatial autocorrelation results indicated that, except for 2015 when public health emergencies in Qinghai showed a spatial negative correlation (Moran's I-0.321, Z=-1.557, P=0.035), no statistical differences were observed in other years (P>0.05). Pearson correlation analysis revealed a positive correlation between the reporting time of incidents and the duration of infectious disease outbreaks (r=0.43, P<0.05), indicating that longer reporting intervals were associated with longer outbreak durations. Conclusion There is a correlation between incident reporting and outbreak duration in Qinghai Province. It is recommended to enhance the awareness of timely reporting among medical institutions at all levels and to strengthen epidemic monitoring in key gathering places, such as primary schools, to reduce the occurrence of public health emergencies. [ABSTRACT FROM AUTHOR]

Aiming at the shortcomings existing in traditional mobile measurement and control system, such as real-time problem and high cost, a multifunctional wireless measurement and control system based on ZigBee and GPRS was designed combining the ZigBee and GPRS technology. The system is compose of sensor node with local measurement and control function, router and coordinator. In the sensor node MC56F8037 was adopted for measurement and control, JN5139 was adopted for ZigBee communication, and series communication was used to exchange data between two components. The coordinator is composed of JN5139, CP2200 and SIM900A module. The multi-interface was implemented in the coordinator besides management of ZiBee network with embedded Ethernet protocol, GPRS protocol and TCP/IP protocol for control based on Internet. The results indicate that the system provides the practical and effective solution for remote monitoring and control with low price and broad market prospects. [ABSTRACT FROM AUTHOR]

High temperature creep and useful creep life behavior of Al-Cu-Mg (2124-T851 aluminum) alloy was investigated by conducting constant stress uniaxial tensile creep tests at different temperatures (473–563 K) and at stresses ranging from 80 to 200 MPa. It was found that the stress and temperature dependence of minimum creep rate could be successfully described by the power-law creep equation. The power-law stress exponent, n = 5.2 and the activation energy for secondary creep, Q = 164 kJ mol−1, which is close to that observed for self diffusion of aluminum (~140 kJ mol−1). The observed values of n and Q suggest that the secondary creep of 2124-T851 aluminum alloy is governed by the lattice diffusion controlled dislocation climb process. A Monkman-Grant type relationship between minimum creep rate and time for reaching 1.5% creep strain is proposed and could be employed for predicting the useful creep life of 2124-T851 aluminum alloy.