金属管浮子流量计智能检测控制系统研制     

岳秋琴  董因涛 《重庆电子工程职业学院学报》2012,(1):159-161

针对目前国内浮子流量计精度差、技术落后的现状,对传统浮子流量计实施技术改革,研制智能金属管浮子流量计检测控制系统,采用研华工控机IPC610硬件配以KingView组态王应用软件平台开发系统硬件结构和软件功能,实现了数据实时采集与处理,大大提高金属管浮子流量计的检测精度和稳定性。  相似文献   

Deviating glucose results in an international dual-center study. A root cause investigation     

Janne Cadamuro  Peter Bergsten  Katharina Mrwald  Anders Forslund  Marie Dahlbom  Jonas Bergquist  Iris Ciba  Susanne M. Brunner  Jeanne Jabbour  Daniel Weghuber 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(1)

During a dual-center study on obese and normal weight children and adolescents, focusing on glucose metabolism, we observed a marked difference in glucose results (N = 16,840) between the two sites, Salzburg, Austria and Uppsala, Sweden (P < 0.001). After excluding differences in patient characteristics between the two populations as cause of this finding, we investigated other preanalytic influences. Finally, only the tubes used for blood collection at the two sites were left to evaluate. While the Vacuette FC-Mix tube (Greiner Bio-One, Kremsmünster, Austria) was used in Uppsala, in Salzburg blood collections were performed with a lithium heparin tube (LH-Monovette, Sarstedt, Germany). To prove our hypothesis, we collected two blood samples in either of these tubes from 51 children (Salzburg N = 27, Uppsala N = 24) and compared the measured glucose results. Indeed, we found the suspected bias and calculated a correction formula, which significantly diminished the differences of glucose results between the two sites (P = 0.023). Our finding is in line with those of other studies and although this issue should be widely known, we feel that it is widely neglected, especially when comparing glucose concentrations across Europe, using large databases without any information on preanalytic sample handling.  相似文献   

针灸疗法消除运动性疲劳与其它疗法的比较研究     

刘娟 《哈尔滨体育学院学报》2009,27(4)

运用文献法和实验法,对针灸疗法在消除运动性疲劳方面的作用进行实验研究。通过进行简单反应时、唾液pH值、主观体力感觉等级表测定,对60名健美专项的学生训练前后针灸效果进行比较,结果表明,运用点压穴位、针刺、艾灸、拔罐法等不同疗法,选用不同穴位,都能够加速运动后疲劳的消除,但程度有差异。  相似文献   

亚极量运动前后胫神经传导速度及肌电图变化初探     

王起然 《成都体育学院学报》1995,21(4):71-74

笔者测试分析了１５名男性和３名女性受试者在安静状态下及亚极量运动负荷后胫神经兴奋传导速度及展肌肌电图指标。结果提示：运动前后胫神经传导速度未见明显改变；亚汲量运动导致的代谢产物堆积可能影响运动终极的兴奋传递。  相似文献   

Application of compactness detection to complicated concrete-filled steel tube by ultrasonic method     

杨建江  王飞  陆苏亮  王川 《天津大学学报(英文版)》2014,20(2):126-132

An example of using ultrasonic method to detect the compactness of complicated concrete-filled steel tube in certain high-rise building was discussed in this study. Because of the particularity of the complicated concrete-filled steel tubular column, the plane detection method and embedded sounding pipe method were adopted in the process of effectively detecting the column. According to the results of the plane detection method and embedded sounding pipe method, the cementing status of steel tube and concrete can be concluded, which cannot be judged by the hammering method in the rectangular steel tube-reinforced concrete.  相似文献   

Numerical study on heat transfer enhancement for use of corrugated,nodal and horizontal grain tubes     

朱家玲  王钰沛  张伟  刘雪玲 《天津大学学报(英文版)》2014,20(5):385-392

With isopentane as working fluid, the heat transfer performances for corrugated, nodal and horizontal grain tubes are simulated. The structural parameters of the three kinds of tubes are compared with those of the plain tube. The numerical results using computational fluid dynamics are validated with theoretical values. For the corrugated, nodal and horizontal grain tubes, the heat transfer enhancements(HTEs) are 2.31—2.53, 1.18—1.86 and 1.02—1.31 times of those of the plain tube, respectively. However, the improved HTEs are at the expense of pressure losses. The drag coefficients are 6.10—7.09, 2.06—11.03 and 0.53—1.83 higher, respectively. From the viewpoint of comprehensive heat transfer factor, the corrugated tube is recommended for engineering applications, followed by the horizontal grain tube.  相似文献   

钢管复合土钉墙支护在城市深基坑中的应用研究     

隋智力 《北京城市学院学报》2014,(1):92-97

本文以北京三峡大厦深基坑开挖支护为工程背景,结合理论分析、现场监测和数值模拟等方法,对钢管复合土钉墙支护的作用机理和应用效果进行了研究。根据土力学和基坑支护相关原理确立力学机理模型,采用有限差分数值模拟方法进行开挖支护模拟,将数值模拟结果与实测基坑变形数据进行分析比较,二者结果基本一致,说明数值模拟方法应用于基坑开挖支护过程是比较可靠的,且从塑性区和变形分析可知用钢管桩复合土钉墙进行支护后的基坑是稳定的,即钢管桩复合土钉墙能很好地满足基坑支护稳定性的要求。  相似文献   

浅析分层注聚工艺及其在陕北的应用潜力     

雷静静  贺亚维 《延安教育学院学报》2014,(3):117-120

自然能量较弱、油藏渗透率低、能产低是油田在开发中面临的的主要问题,需要注水补充地下能量来继续开发,又因为地下有天然微裂缝存在,增加了注水开发的难度,所以油藏注水后见效、见水差异较大。为了提高驱油效率,有效地扩大波及面积,最有效的方法之一就是改善驱替状况。分层注聚工艺主要可分为单管注聚工艺和同心双管注聚工艺两大类,单管注聚工艺主要有偏心单管、单管多层分注以及其它单管注聚工艺等。分层注聚工艺可以相应的控制层间聚合物溶液的吸收量和注聚剖面,避免聚合物沿高渗透带单层突进,使难动油层得到开发,效果好于普通注聚工艺。并且在矿场应用中取得了明显的效果。通过地层特征对比提出在陕北地区应用分层注聚工艺的需求。  相似文献   

Interferences from blood collection tube components on clinical chemistry assays     

Raffick A.R. Bowen  Alan T. Remaley 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2014,24(1):31-44

Improper design or use of blood collection devices can adversely affect the accuracy of laboratory test results. Vascular access devices, such as catheters and needles, exert shear forces during blood flow, which creates a predisposition to cell lysis. Components from blood collection tubes, such as stoppers, lubricants, surfactants, and separator gels, can leach into specimens and/or adsorb analytes from a specimen; special tube additives may also alter analyte stability. Because of these interactions with blood specimens, blood collection devices are a potential source of pre-analytical error in laboratory testing. Accurate laboratory testing requires an understanding of the complex interactions between collection devices and blood specimens. Manufacturers, vendors, and clinical laboratorians must consider the pre-analytical challenges in laboratory testing. Although other authors have described the effects of endogenous substances on clinical assay results, the effects/impact of blood collection tube additives and components have not been well systematically described or explained. This review aims to identify and describe blood collection tube additives and their components and the strategies used to minimize their effects on clinical chemistry assays.  相似文献   

湿式空冷器管束翅片管的改造     

冯晓明 《黑龙江科技信息》2011,(7):25-25

针对湿式空冷器运行和制造中存在的问题,参照国内外空冷器设计中采用的新方案、新结构及其制造特点,对其管束翅片管进行改造,效果良好。  相似文献