气垫式连续退火炉设计计算

介绍了气垫炉的基本工作原理和设备组成,对气垫炉炉体结构进行设计计算。     

基于PLC的打包机控制系统设计

工厂企业当中在出货之前要进行打包,一般采用的是打包机来实现.通过PLC控制的打包系统有着很高的可靠性和工作效率.本文介绍如何利用三菱公司的PLC来控制化纤打包机,利用梯形图的指令来进行编程.     

板坯连铸过程二冷边界条件处理方法的对比

以相同的冷却强度、拉速、浇注温度、钢种等板坯连铸条件为模拟初始参数,采用相同的凝固潜热处理方式,针对两种常用的板坯连铸二冷边界条件处理方法FCA法和MCA法,分别采用四种不同的传热经验公式,计算了板坯连铸的热过程。得到这两种处理方式四种不同二冷传热经验公式的八组计算结果,并将计算结果与实测值相比较,结果证明,采用FCA法处理边界条件,得到的模拟计算结果与实测值相对误差均小于5%,而利用MCA法处理边界条件,得到的模拟计算结果与实际测量值相对误差在8%左右。因此,采用FCA法处理板坯连铸二冷边界条件得到的模型能更加准确地模拟板坯连铸的热过程。     

低免疫原性靶向微泡的制备研究

目的 制备低免疫原性靶向微泡.方法 采用不同膜磷脂成份制备表面包埋或暴露生物素的靶向微泡(MBb或MBe),荧光鉴定"生物素-链亲和素"桥连技术构建靶向微泡的可靠性.以普通微泡(MBc)为参照,酶联免疫吸附法体外检测三组微泡与人血清反应后的补体3a(C3a)水平;平行平板流动腔实验检测各组微泡与包被有链亲和素培养皿的黏附力.结果 MBe及MBb均发出明亮的环形绿色荧光,而MBc未见荧光.MBb组的C3a水平[(1.037±0.047)ng/m1]明显低于MBe组[(1.326±0.042)ng/m1](P＜0.05),与MBc组[(1.004±0.031)ng/m1]差异无统计学意义(P＞0.05).平行平板流动腔实验显示MBb组黏附的微泡数[(15.2±11.3)个/视野]少于MBe组[(103.2±28.3)个/视野](P＜0.05),与MBc组[(17.8±11.9)个/视野]差异无统计学意义(P＞0.05).结论 成功制备屏蔽表面免疫原性物质的靶向微泡,为进一步活体实验提供了基础数据.     

高血压脑出血合并应激性溃疡出血患者的护理

目的 探讨高血压脑出血后预防和控制应激性溃疡出血的护理.方法 针对我科自2006年7月～2009年7月120例高血压脑出血合并应激性溃疡患者进行细致观察和护理.结果 120例患者,其中8例因出血量较大经抢救无效死亡,5例治疗好转后出院,其余经内科保守治疗和精心护理后,上消化道出血治愈.结论 预防控制溃疡出血所采取的一系列护理措施为脑出血病人进一步康复打下良好基础.     

肝血管平滑肌脂肪瘤的超声造影表现

Objective To investigate the features of hepatic angiomyolipoma(AML) on contrast enhanced ultrasound (CEUS). Methods Ten pathologically proved AML lesions in 9 patients were evaluated by using baseline ultrasound and CEUS. CEUS was performed with contrast pulse sequencing technique and the contrast agent of SonoVue. Results On baseline ultrasound, 7 lesions exhibited mixed echoic,which was obvious hyperechoic combined with partly of hypoechoie; 3 lesions exhitited obvious hypereehoic. On color Doppler flow imaging artery signals were detected in all lesions. And the lesions had plenty or slightly plenty of artery supply,with resistive index about 0.53 4±0.10 (0.48~0.62). On CEUS, in the arterial phase, 9 lesions exhibited hyper-enhanced. In the portal phase, 5 lesions exhibited iso-enhancement,1 lesion was slightly hyper-enhancement and 3 lesions was hypo-enhancement. In the late phase 6 lesions were iso-enhancement and 3 lesions were hypo-enhancement. One lesion was all hypo-enhancement in all three phases. Conclusions There are some characteristic manifestations of hepatic AML in CEUS, which are helpful for the diagnosis of hepatic AML in a way,but we still need more experiences.     

六氟化硫脂质微泡的制备研究

目的 制备六氟化硫脂质微泡,为靶向微泡的研制奠定基础.方法 以二硬脂酰磷脂酰胆碱、聚乙二醇磷脂酰乙醇胺为膜成分,六氟化硫为气体核心,薄膜一超声法制备微泡.以SonoVue作对照,观测自制微泡的形态、粒径、浓度、pH值、渗透压等各项理化参数.在二次谐波模式下观察微泡显影体外水囊及兔肾实质,测量分析增强图像峰值灰度.结果 自制微泡和SonoVue均大小均匀,圆形,中空透亮,平均直径分别为2.25μm和2.50 μm,粒径分布分别为0.4～10 μm和0.2～10 μm,90%微泡直径分别控制在6 μm和8 μm以内.初始浓度分别为5 x 108～10 X 108/ml和1 x 108～5 x 108/ml,配置后的稳定性均为6 h.显影水囊灰度值分别为121.67±6.76和122.33±4.53(P>0.05),兔肾造影增强峰灰度分别为72.00±7.21和74.65±10.93(P>0.05).结论 脂质微泡制备成功,具有良好的理化特性及显影效果.     

肝血管平滑肌脂肪瘤的超声造影表现

Objective To investigate the features of hepatic angiomyolipoma(AML) on contrast enhanced ultrasound (CEUS). Methods Ten pathologically proved AML lesions in 9 patients were evaluated by using baseline ultrasound and CEUS. CEUS was performed with contrast pulse sequencing technique and the contrast agent of SonoVue. Results On baseline ultrasound, 7 lesions exhibited mixed echoic,which was obvious hyperechoic combined with partly of hypoechoie; 3 lesions exhitited obvious hypereehoic. On color Doppler flow imaging artery signals were detected in all lesions. And the lesions had plenty or slightly plenty of artery supply,with resistive index about 0.53 4±0.10 (0.48~0.62). On CEUS, in the arterial phase, 9 lesions exhibited hyper-enhanced. In the portal phase, 5 lesions exhibited iso-enhancement,1 lesion was slightly hyper-enhancement and 3 lesions was hypo-enhancement. In the late phase 6 lesions were iso-enhancement and 3 lesions were hypo-enhancement. One lesion was all hypo-enhancement in all three phases. Conclusions There are some characteristic manifestations of hepatic AML in CEUS, which are helpful for the diagnosis of hepatic AML in a way,but we still need more experiences.     

基于人工神经网络的非线性组合预测方法研究

在现有组合预测模型中以线性或非线性规划方法求解优化问题遇到了较多的困难,而递归组合预测方法的过程又较为烦琐。针对这一问题,本文基于人工神经网络技术建立了一种新的非线性组合预测模型;并从避免不规则权重入手,提出了通过主分量分析提高参与组合预测信息有效性的方法,提高了预测精度。实践表明,效果是令人满意的。     

超声诊断嗜酸性膀胱炎1例

患儿男,９岁。因间歇性尿频尿急６年,加剧１个月来院行超声检查。３岁起尿频尿急,每日小便２０～３０次,伴夜间遗尿,在外院对症治疗６年无效。入院后体检：心肺腹部无特殊。实验室检查：小便常规、生化、肝功、血肌酐均在正常范围。ＣＴ：膀胱右前壁及下后壁明显不规则增厚,考虑膀胱壁增生引起。膀胱镜活检：膀胱粘膜下可见大量嗜酸性白细胞浸润。超声检查：膀胱呈充盈状态,形态正常。右侧及上侧内壁呈堤围状增厚,最厚处达２ｃｍ。增厚以粘膜为主,全体呈等回声,内部回声尚均匀,粘膜表面稍毛糙,浆膜层清晰平滑。彩超检查见增厚部…