中老年甲亢性心脏病20例误诊分析

目的探讨中老年甲亢性心脏病的临床特点及误诊原因。方法对20例中老年甲亢性心脏病临床资料进行回顾分析。结果中老年甲亢性心脏病的临床表现不典型且多样化。结论系统问诊,查体,正确分析病情,检测血甲状腺激素及促甲状腺激素水平是避免误诊的关键。     

小型敏感抗静电动力源火工品

介绍了一种小型敏感动力源火工品的主要结构和设计参数以及提高其抗静电性能的途径。     

Experimental study on thermal resistance of fouling in heat exchangers of sewage source heat pumps

To investigate the formation of fouling in sewage heat exchangers,a model of thermal resistance with time is developed based on the experiments in a practical engineering site. And this model is asymptotic exponential function. According to the characteristic of sewage heat exchangers,the effective thermal resistance and effective coefficient of heat transmission during the formation of fouling are defined. A model for pressure loss of fouling of asymptotic distribution is presented based on the model of thermal resistance of fouling. And the maximum absolute margin of error of the fouling thermal resistance is smaller than the typical allowable error range. The maximum relative error of the heat transfer coefficient is 12% . These can meet the requirements of engineering. The results of experiments provide a basis for further study and application of swage heat exchangers.     

某高能束加速器CT检测厂房暖通空调系统设计

针对某工业高能束加速器CT检测厂房的供暖、通风、空调系统的设计要点及辐射防护措施进行了详细探讨，介绍了直线加速器室臭氧防护通风换气量、补风方式、进排风系统的设置及厂房其他区域的通风要求。