Analysis of Numerical Results in High Temperature Congealment and Chemistry Non-equilibrium Flow Field

Using the air plasma ignition technique, physicochemical process of burning can be accelerated; concentration limit ofretrofires both can be extended; reliability of retrofires and stability of burning can be improved. In this paper, using internalequivalent heat area in place of electric are that created Ohm heat, the flow fields of thermodynamic equilibrium chemistry con-gealment and chemistry non-equilibrium in the plasma generator were simulated. The influences of the inlet prerotation angleof air, the inlet total pressure of air and the airflow compression angle of spray nozzle on the temperature on the surface of elec-

Heat Production Rate Calculation of Thermal Manikin with a Compensation Method

Thermal manikin plays important roles in simulating thethermal state of human bodies to facilitate the evaluationof thermal comfort properties of various clothing assem-blies.Based on the heat balance principle and analysis ofrelated factors,the heat production rate of manikin isrecommended as an efficient evaluation index.Whereas,its inside heat production which occurs as a result of theexistence of temperature difference between its insidepart and outside surface,should not be ignored.Through a series of theoretical analysis and calculations,a compensative equation is deduced in this paper.

多层CT尿路成像检查在非结石性尿路梗阻诊断中的效能

目的:分析多层CT尿路成像检查在非结石性尿路梗阻诊断中的效能。方法:选取2019年1月至2021年6月该院收治的92例疑似非结石性尿路梗阻患者进行前瞻性研究,所有患者均行多层CT尿路成像检查,以手术诊断结果为金标准,分析多层CT尿路成像检查在非结石性尿路梗阻诊断中的效能,并采用Kappa检验多层CT尿路成像检查与手术在非结石性尿路梗阻诊断中的一致性。结果:手术诊断结果显示,92例疑似非结石性尿路梗阻患者确诊阳性80例,包括泌尿系肿瘤28例,肿瘤侵犯或外源性压迫22例,泌尿系慢性炎症20例,先天发育畸形5例,术后肠粘连5例;确诊阴性12例;多层CT尿路成像检查结果显示,阳性79例,阴性13例;多层CT尿路成像检查诊断非结石性尿路梗阻的灵敏度为97.50%,特异度为96.74%,准确度为96.74%,阳性预测值为98.73%,阴性预测值为84.62%,误诊率为9.09%,漏诊率为15.38%;多层CT尿路成像检查与手术诊断结果的一致性极好(Kappa=0.861,P<0.05)。结论:多层CT尿路成像检查诊断非结石性尿路梗阻的效能极高。

先天非结石梗阻性肾积水影像诊断与病理基础

目的:回顾分析输尿管先天非结石梗阻性肾积水影像特征,提高对肾积水致病原因及输尿管无病变侧肾继发性改变特征的识别能力。方法:根据静脉肾盂造影、逆行肾盂造影、B型超声波及CT检查结果,经手术和病理证实的输尿管先天非结石梗阻性肾积水86例进行对照研究。结果:中、重度肾积水占86.0%,致病因素中输尿管狭窄占83.7%,其中一侧输尿管多处狭窄和(或)双侧输尿管狭窄占20.9%。肾积水的不同影像特征与输尿管梗阻的部位不同有关,轻度肾积水的肾盂改变类似"壶腹"型肾盂。结论:先天非结石梗阻性肾积水的病因多样,但多伴有输尿管狭窄。输尿管狭窄具有单侧多发及双侧同时发病的特点。一侧肾重度积水时,另一侧肾盂改变注意不要误诊为"壶腹"型肾盂。输尿管狭窄的定位诊断以逆行肾盂造影与静脉肾盂造影相结合为首选。

CT尿路造影对非结石性尿路梗阻疾病的诊断作用

目的 评价CT尿路造影 (CTU)对非结石性尿路梗阻疾病的诊断作用。方法 4 0例非结石性尿路梗阻病例给予实质期、分泌期增强螺旋扫描。分泌期数据经第 2次重建后在工作站以三维方式获得CTU影像。结果 4 0例中 ,2 4例良性梗阻呈轻度或重度积水。 18例先天畸形CTU呈现各自特征 ;4例输尿管炎表现为鸟嘴样狭窄 ,2例前列腺增生可见膀胱后壁压迹。 16例肿瘤患者梗阻端呈截断或锥状狭窄伴局部软组织影 ,12例尿路中度积水 ,4例重度积水。其中 4例呈双侧积水。对6例一侧无分泌功能者 ,可采用最小强度投影等予以显示 ,并与对侧最大强度投影像等整合。