Objective To investigate the current status of military training injuries among aviation cadets in a university,analyze the influencing factors and propose prevention and control measures.Methods Enrolled in the study in December 2021 were 605 male aviation cadets,of whom 192 were freshmen,202 were sophomores and 211 were juniors.A self-made questionnaire form was developed and used to investigate and analyze the occurrence of training injuries among aviation cadets.Results The rate of training injuries among the aviation cadets was 57.19%,of whom 43.75%were freshmen,60.40%were sophomores,and 66.35%were juniors.Injuries sites were mainly in the lower extremities,with freshmen,sophomores and juniors ranking the first,but with a decreasing trend.In injury-causing subjects,3 000 m race ranked the first in the freshmen,single parallel bars ranked the first in the sophomores,other factors ranked the first in the juniors.In terms of medical care,self-diagnosis and care accounted for 34.97%and outpatient medical care accounted for 46.82%,with the sum of them accounting for 81.79%.Conclusion There is a relatively high rate of training injuries among aviation cadets.The number of training injuries,affected injury sites,injury-causing subjects,onset of seasons and adverse factors vary with the advance of grades and display various features.Further emphasis on health education among aviation cadets and the improvement of outpatient medical service are of great importance to the prevention and treatment of training injuries among aviation cadets.

Objective:To investigate and analyze the dietary nutritional status of cadets in a military academy，and provide a point of reference for a balanced diet for the cadets.Methods:The physical condition of the cadets was measured by body mass index（BMI）. The dietary survey was carried out by weighing food method，then the daily intakes of food and nutrients per person，and the supply ratio of calorigenic nutrients were calculated. The blood biochemical indexes such as fasting blood glucose，uric acid，and total cholesterol were analyzed to evaluate the nutritional status of the cadets.Results:The average BMI score of the cadets was 22.1±1.7，and the cadets with the normal BMI accounted for 83.2%. The daily calorie intake of each cadet was 12.13 MJ，including 19.24% from proteins，45.94% from fats，and 34.82% from carbohydrates. The dietary structure featured high protein，high fat，and low carbohydrate. The intakes of grain，fish and shrimp，soybean，vegetables，fruits，edible mushrooms，and dried vegetables were insufficient，while the intake of poultry was excessive. The intake of vitamin B 1 was slightly insufficient，while the intakes of vitamin E and nicotinic acid were excessive. The intakes of sodium，phosphorus，iron，and selenium were too high，while the intakes of magnesium，calcium，and zinc were slightly insufficient. Among the cadets，0.76% of them had low fasting blood glucose，36.36% of them had hyperuricemia，and 7.58% and 3.03% of them had HDL-C and LDL-C at critical levels of excessiveness，respectively. Conclusion:The cadets have a variety of daily food intakes that provide them with enough calorie intakes，but the diet is not quite balanced due to improper intakes of some nutrients，therefore，the dietary nutrition education should be strengthened among the cadets.

Objective:To investigate and analyze the dietary nutritional status of cadets in a military academy，and provide a point of reference for a balanced diet for the cadets.Methods:The physical condition of the cadets was measured by body mass index（BMI）. The dietary survey was carried out by weighing food method，then the daily intakes of food and nutrients per person，and the supply ratio of calorigenic nutrients were calculated. The blood biochemical indexes such as fasting blood glucose，uric acid，and total cholesterol were analyzed to evaluate the nutritional status of the cadets.Results:The average BMI score of the cadets was 22.1±1.7，and the cadets with the normal BMI accounted for 83.2%. The daily calorie intake of each cadet was 12.13 MJ，including 19.24% from proteins，45.94% from fats，and 34.82% from carbohydrates. The dietary structure featured high protein，high fat，and low carbohydrate. The intakes of grain，fish and shrimp，soybean，vegetables，fruits，edible mushrooms，and dried vegetables were insufficient，while the intake of poultry was excessive. The intake of vitamin B 1 was slightly insufficient，while the intakes of vitamin E and nicotinic acid were excessive. The intakes of sodium，phosphorus，iron，and selenium were too high，while the intakes of magnesium，calcium，and zinc were slightly insufficient. Among the cadets，0.76% of them had low fasting blood glucose，36.36% of them had hyperuricemia，and 7.58% and 3.03% of them had HDL-C and LDL-C at critical levels of excessiveness，respectively. Conclusion:The cadets have a variety of daily food intakes that provide them with enough calorie intakes，but the diet is not quite balanced due to improper intakes of some nutrients，therefore，the dietary nutrition education should be strengthened among the cadets.

Objective:To do research on prediction method of medical equipment sudden fault for the requirement of medical security at sea which is away from base.Methods: Sudden fault data of the medical equipment is a random variable which often manifest as the time of sudden fault happening. The possible distribution type of fault data is hypothesized according to the engineering experience. In order to ensure the sudden fault density function of medical equipment, parameter estimation and distribution fit test are carried out for the fault data.Results: The sudden fault prediction model of medical equipment is established to get the future sudden fault probability of medical equipment based on the distribution function of fault data.Conclusion: The results of case analysis validate the rationality of sudden fault prediction model.

Objective To observe the protective effect of pretreatment with wortmannin against pancreas and liver injuries indued by severe acute pancreatitis(SAP) in rats and investigate its mechanism.Methods Fifty-four SD rats were randomly divided into 3 groups: control group(C group),SAP group(P group) and SAP+wortmannin group(PW group)(n=18 per group). SAP model was induced by retrograde infusion of 50g/L sodium taurocholate into the biliopancreatic duct of rats,except C group in which sodium taurocholate was replaced by normal saline. Serum level of tumor necrosis factor-alpha(TNF-?)、 alanine aminotransferase(ALT)、aspartate aminotransferase(AST)、and nuclear factor-kappa B(NF-?B)in liver were detected. Histopathology of liver and pancreas was studied.Results In P group, serum levels of TNF-?、ALT、AST and NF-?B in liver were significantly elevated(P