社区干预对前期糖尿病患者转归的影响

目的观察社区干预对前期糖尿病患者转归的影响。方法采用统计分析系统中指定种子数将140例前期糖尿病患者随机分为观察组和对照组各70例。两组患者得到体检报告中合理建议,对照组不予主动干预;观察组给予为期1年的社区干预,主要包括饮食、运动、知识宣教,血糖自我监测。观察体检1年后两组患者疾病的转归。结果 1年后,观察组在空腹血糖、糖化血红蛋白、餐后2h血糖、血脂、体重指数等方面与对照组相比,差异具有统计学意义(P0.05);前期糖尿病的转归观察组好于对照组。结论社区干预可明显降低前期糖尿病患者发展成临床糖尿病的风险。

Analysis and Restrain of Mutual Inductance Asymmetry in the Sectionally Powered AC Linear Motor

This paper presents a research on air-gap magnetic field distribution and mutual inductance asymmetry phenomenon of the sectionally powered AC linear motor. With consideration of the harmonic magnetic field, the paper deduces the analytical expressions of the distribution of the air-gap magnetic field and the self- and mutual- inductance of the motor. Additionally, the paper verifies the correctness of the analytical expressions with help of the finite element simulation. The analysis shows that, the existence of the unexcited primary induces an additional off-set pulsating component in the air-gap flux density of the motor with common winding type, which results in the mutual inductance asymmetry, and the degree of the asymmetry lies of the length of the unpowered primary and that of the powered section. As to the motor with new winding type, the mutual inductance asymmetry results from the asymmetry of the arrangement of the winding, and the degree of the asymmetry only lies on the poles of the powered section, has nothing to do with the unpowered section. And compared with the motor with common winding type, the motor with the new winding type could apparently reduce the degree of the mutual inductance asymmetry.