硫铁矿焙烧系统中三氧化硫含量与pH的关系

硫铁矿是重要的冶金原料之一,在冶炼工业中应用广泛,它的主要化学成分为二硫化亚铁,是一种重要的化学矿物原料,常用来制造硫酸,其矿渣可用来炼铁、炼钢,若炉渣含硫量较高,含铁量不高时,可以用作水泥的附属原料;硫铁矿也会用于制造硫磺或者其他含硫的化合物。在实际生产过程中,转化氛围对产品性能和过程能耗有显著影响,基于此,本文主要研究了硫铁矿焙烧中pH-硫酸浓度之间的关系,为硫酸类溶液体系的pH和酸碱度分析提供了试验依据和预测理论模型。

基于SPOC+班级虚拟共同体+TfU在COVID-19疫情期间儿科学在线教学的实践探究

目的研究COVID-19疫情期间采用SPOC+班级虚拟共同体+TfU在儿科学在线教学的实践。方法选取2017级预防医学专业107人为研究对象,以儿科学课程在线教学为依托,分为对照组53人、实验组54人。对照组采用播放录播课程模式,进行课后讨论及答疑等形式;实验组采用SPOC+班级虚拟共同体之教学模式进行效果验证;上述两组学生采用TfU模式并通过在线教学过程指标、教学满意度调查问卷测评教学结果。结果在线教学过程指标的量化分析及在线教学效果实验组评分高于对照组(P<0.05),实验组对教学满意程度较高(P<0.05)。结论儿科学课程在线教学中采用SPOC+班级虚拟共同体+TfU模式有利于提升学生对在线教学的认知与满意度,为丰富在线教学模式提供依据。

Clinical observation of deep electroacupuncture at Baliao points for female stress urinary incontinence

Objective:To observe the clinical efficacy of deep electroacupuncture(EA)at Baliao points in treating stress urinary incontinence(SUI).Methods:A total of 60 female patients with SUI were divided into two groups according to the order of consultation,with 30 cases in each group.The control group was treated with pelvic floor muscle training.The treatment group was treated with deep EA at Baliao points[Shangliao(BL 31),Ciliao(BL 32),Zhongliao(BL 33)and Xialiao(BL 34)].Results:The total effective rate was 93.3%in the treatment group,versus 33.3%in the control group,and the total effective rate of the treatment group was significantly higher than that of the control group(P<0.05).After treatment,the scores of international consultation on incontinence questionnaire-short form(ICIQ-SF)and the volume of urinary leakage in both groups were lower than those before treatment(all P<0.05),and the ICIQ-SF score and the volume of urinary leakage in the treatment group were lower than those in the control group(both P<0.05).Conclusion:Deep EA at Baliao points with long needles can improve the clinical symptoms in female patients with SUI,and it has a better curative effect than pelvic floor muscle training.