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[Objective] The study aims to explore the effects of different foliar fertilizers on the photosyn thetic characteristics, fruit quality, and yield of greenhouse strawberries, and to screen suitable foliar fer tilizers. [Methods] The strawberry variety “Monterey” planted in the greenhouse of Moujiatai Strawberry in Xigu District of Lanzhou City, Gansu Province was used as test materials. Under sufficient fertilization, five types of foliar fertilizers, including classic 750×liquid (T1), Huapu 1 500×liquid (T2), and Runliang 750×liquid (T3), 500×Adela fruit (T4), and 1500×potassium dihydrogen phosphate (T5), were ap plied topdressing at four growth stages, with water as control. The photosynthetic parameters, fruit qual ity, biomass, and yield were measured. [Results] (1) After spraying different foliar fertilizers, the bio mass and chlorophyll content of strawberry plants were significantly increased, and the net photosynthetic rate and transpiration rate of leaves were significantly increased, while the intercellular carbon dioxide con centration was higher than that of CK. (2) For fruit quality, T2 and T3 treatments significantly improved the strawberry fruit shape index, while T1 and T5 treatments significantly increased fruit volume and weight. Among them, the average single fruit mass of T1 was increased by 35.04% compared with CK, while the transverse and longitudinal diameters of T5 fruits were increased by 49.39% and 40.64%, re spectively. (3) The quality of strawberry fruits was effectively improved by various foliar fertilizer treat ments, and T1 treatment was the best. The content of vitamin C, soluble solids, soluble proteins, reduc ing sugars, and soluble sugars were increased by 30.84%, 33.5%, 38.5%, 27.9%, and 36.2%, respec tively, compared with CK. The content of titratable acid was the lowest, and the sugar acid ratio was the highest, with significant difference compared with CK. (4) Spraying appropriate fertilizer significantly in creased plant biomass, max single fruit weight, and fruit yield; treatment T1 had the highest yield, an in crease of 13.65% compared with CK. [Conclusion] The application of appropriate foliar fertilizer effective ly improves the nutritional growth status of strawberries, enhances the quality of strawberry fruits, and significantly increases yield. The comprehensive effect is best when applying classic 750×liquid.

This study aimed to investigate spontaneous hypothermia among emergency trauma patients and develop a predictive model. A cohort of 162 emergency trauma patients was categorized into hypothermic (n = 61) and control (n = 101) groups, with trauma severity assessed using the modified Glasgow Coma Scale (GCS). Univariate analysis revealed significant differences between the groups in trauma severity, posture, garment wetness, warming measures, pre-hospital fluid resuscitation, and modified GCS scores (P < 0.05). The hypothermic group exhibited lower prothrombin time compared to the control group (P < 0.05). A logistic regression model was constructed, expressed as Y = 25.76 − 1.030X 1 + 0.725X 2 + 0.922X 3 − 0.750X 4 − 0.57X 6, and its fit was evaluated using the Hosmer–Lemeshow test. The receiver operating characteristic curve demonstrated an area under the curve of 0.871, with 81.2% sensitivity and 79.5% specificity. The Youden index identified the optimal predictive cut-off at its highest (0.58). Validation results included 86.21% sensitivity, 82.93% specificity, and 84.29% accuracy. Risk factors for spontaneous hypothermia after emergency trauma encompassed trauma severity, posture during consultation, clothing dampness upon admission, warming measures during transfer, pre-hospital fluid resuscitation, and modified GCS scores. The risk prediction model demonstrated high accuracy, enabling effective assessment of spontaneous hypothermia risk in emergency trauma patients and facilitating preventive measures.

X-ray detectors made by optical fiber coupled with full-frame CCD are widely used in highprecision X-ray CT scanning of laboratory. Because of the strong penetration of Xrays, the conventional shutter can’t realize ray shielding, so the fullframe CCD detector usually works in the shutterfree mode which can’t avoid generating image smears. Due to image smears, the image observation is seriously affected and the dynamic range of effective data of the CCD detector is reduced. The smears of projection images of fullframe CCD detector must be corrected. In order to correct smears of projection images in CT scanning application, the characteristics of image smear of fullframe CDD in standard readout mode and charge flush readout mode were studied in this paper. And the applicability of the widely used smear correction method using line pixels data of the optical black region to the smear correction of Xray radiation imaging was studied too. It is found that the application of dark pixels correction method to correct the radiation projection image may bring thin strip artifacts. The results come from two main reasons. Firstly, the fluctuation of pixels data can’t be effectively suppressed by calculating the mean value, because the number of lines of pixels data of the optical black region is too small. Secondly, the fluctuation of line pixels data of the optical black region will increase due to the radiation interference during integration. An improved smear correction method using nonexposed line pixels data was proposed in this paper to avoid the two shortcomings above. Using this method, the image smear is corrected by using the nonexposed line pixels data which aren’t exist during integration, so the radiation interference during integration is well solved. In addition, the stability of correction data is improved by calculating the mean value of more nonexposed line pixels data because the number of nonexposed line pixels data can be customized on demand. Further study of dynamic exposure CT scanning imaging shows that the correlation between the smear charges and the exposure charges of the readout image has changed due to the change of the position of the measured sample during exposure and image readout. Therefore, the image smears of dynamic exposure can’t be suppressed by conventional image correction. In order to solve the problem of correcting the smear in dynamic exposure imaging, a ROI fast readout mode based on radiation shielding was proposed, which can effectively suppress the generation of image smear by shortening the transfer time of the integral charge. The experimental results show that the smears of DR image are effectively suppressed, and the quality of the projection image is improved, when applying smear correction method proposed in this paper to static exposure CT scanning. And when applying the ROI fast readout mode proposed in this paper to dynamic exposure CT scanning, the smears of DR image are suppressed, the dynamic range of effective data of the detector is improved, and the problem of image smear correction for dynamic exposure imaging is effectively solved.