Microwave sensor for recognition of abnormal nodule tissue on body surface / 生物医学工程学杂志

For the detection and identification of abnormal nodular tissues on the body surface, a microwave sensor structure loaded with a spiral resonator is proposed in this paper, a sensor simulation model is established using HFSS software, the structural parameters are optimized, and the actual sensor is fabricated. The S21 parameters of the tissue were obtained when nodules appeared by simulation, and the characteristic relationship between the difference of S21 parameters with position was analyzed and tested experimentally. The results showed that when nodules were present in normal tissues, the curve of S21 parameter difference with position change had obvious inverted bimodal characteristics, and the extreme value of S21 parameter difference appeared when the sensor was directly above the nodules, which was easy to identify the position of nodules. It provides an objective detection tool for the identification of abnormal nodular tissues on the body surface.

Relationship study between pressure source and mental healthy of freshmen in medical college / 中华行为医学与脑科学杂志

Objective To explore the relationship between pressure source and mental healthy of freshmen in medical college. Methods 1324 freshmen in medical college were assessed with Beck-Srivastava stress inventory (BSSI) and checklist 90 (SCL-90) to detect the pressure source and mental health state. Relative analysis and regression analysis was used to statistic differences. Results The BSSI total score was from 49 to 119,mean score was (77.68 ± 12.47 )of freshmen in medical college. It was obviously higher than critical pressure.The 6 factors score of SCL-90 in somatization, compulsion, interpersonal relationship, depression, anxiety and hostility were significantly higher than Chinese domestic norms, the difference has a statistical significant (P ＜0. 01 ). The 7 factors score of somatization, compulsion, interpersonal relationship, depression, anxiety, hostility and fear in male freshmen were higher than those in female freshmen, the difference has a statistical significant (P＜ 0. 05 or P＜ 0.01 ). Relative analysis and regression analysis results showed that 5 factors of BSSI entered the regression equaltion. Conclusion The mental health problems of freshman in medical college were relatively serious, and the college should be pay special attention to the problem and intervene early.