Key Technologies of Urban TIA and Their Application

Introduction　　Withthedevelopmentofeconomy ,Chinahasmaderapidprogressinurbanconstruction .Therearemoreandmorenewly builtprojectsandreconstructedprojectsthatinfluenceurbantraffic ,andthenumberofautomobilesisincreasing ,too .Thoughthefoundationalfacilities…     

高氧液预处理对心脏瓣膜置换术患者血浆丙二醛和超氧化物歧化酶的影响

目的观察高氧液预处理对心脏瓣膜置换术患者血浆丙二醛(MDA)和超氧化物歧化酶(SOD)的影响。方法30例择期心脏瓣膜置换术患者随机分为试验组和对照组,在麻醉后切皮前(T0)至心肺转流(CPB)开始后10 min,对照组静滴复方氯化钠注射液10 mL/kg,试验组给予相等容量的高氧液。分别于麻醉后切皮前(T0)、CPB开始后1 h(T1)、主动脉开放后2 h(T2)、主动脉开放后24 h(T3)共4个时点,测定MDA和SOD。结果T0时点MDA质量浓度两组间无明显差异(P>0.05),T1时显著增高,T2时达高峰,T3仍显著高于术前(P<0.05)。两组间比较,T2时试验组明显低于对照组(P<0.01)。T0时点SOD活性两组间无明显差异(P>0.05),试验组各时点无明显变化(P>0.05)。对照组T1、T2时明显降低,与试验组相比有明显差异(P<0.05)。两组心脏自动复跳率、电除颤率、心律失常发生率、术中多巴胺用量相比均无明显差异(P>0.05),术后24 h多巴胺用量,试验组明显低于对照组(P<0.01)。结论高氧液预处理能使MDA质量浓度明显下降,SOD活性保持不变,减轻心肌缺血/再灌注损伤。     

一种新型压实度连续检测方法

从压实度连续检测技术的研究现状出发,对利用加速度连续检测压实度的可行性进行了深入的分析,提出了连续检测技术的工作原理和技术框架,对公路压实质量检测及监控有一定的指导意义.     

关于顾客满意水平的质量成本探讨

本文从质量成本的理论出发，探讨了关于顾客满意水平的质量成本的内容和特性曲线，在此基础上解释了企业在质量改进方面具有不同态度和行为的原因，并提出了一些相应的建议。     

An Experimental Study on the Drag Property of High Temperature Particles Falling into Cold Liquid Pool

This experiment is to study the special resistant induced by the high-speed evaporation surrounding the moving high-temperature particles. An observable equipment was designed, in which the first 11 experiments were performed by pouring one or several Zirconia spheres with various high-temperature and a diameter of 3-10mm into a water pool. The particles falling-down speeds were recorded by high-speed photographic instrumentation,and pressures and water temperatures were measured. A comparison between the experiments with cold and hot spheres respectively, employing three different sphere types each, was presented. The experimental data, com-pared with the theory of the evaporation drag model, are nearly identical.     

Nonlinear inverse modeling of sensor based on back-propagation fuzzy logical system

Objective To correct the nonlinear error of sensor output, a new approach to sensor inverse inodeling based on Back-Propagation Fuzzy Logical System （BP FS） is presented. Methods The BP FS is a computationaiiy efficient nonlinear universal approximator, which is capable of implementing complex nonlinear mapping from its input pattern space to the output with fast convergence speed. Results The neuro-fuzzy hybrid system, i.e. BP FS, is then applied to construct nonlinear inverse model of pressure sensor. The experimental results show that the proposed inverse modeling method automatically compensates the associated nonlinear error in pressure estimation, and thus the performance of pressure sensor is significantly improved. Conclusion The proposed method can be widely used in r nonlinearity correction of various kinds of sensors to compensate the effects of nonlinearity and temperature on sensor output.     

分布式虚拟环境中分级兴趣管理研究

分布式虚拟环境中，分级兴趣管理技术虽能进一步减少负载，但却会增加数据的发送量。为此，提出了一种分级兴趣管理的网络通信方法，当需要同时对高、低兴趣实体集发布数据时，该方法只需从整个兴趣实体集所对应的多播地址发布一个数据包即可。仿真结果表明，与传统分级兴趣管理技术相比，它可以减少数据的发送量,且实现非常简单。     

需求低于充分就业水平的原因及对策

建立多部门生产函数，然后应用该函数对需求低于充分就业水平的原因进行分析，需求低于充分就业水平的原因部分属于经济的供给方面，部分属于经济的需求方面；根据分析结果提出相应的总供管理对策和总需求管理对策，推行积极的财政政策，完善社会保障机制，调整税收政策，扩大出口等。     

如何搞好高等级公路的养护

从严格考核管理、重视日常保洁、规范坑槽维修、加强路面巡查、注意环境保护五个方面对搞好高等级公路的养护进行了阐述。     

滑油污染度对车用柴油机台架磨合过程影响研究

利用油液检测技术中光谱分析、颗粒度分析和铁谱分析方法，研究了滑油污染度对CA6110Z-07Y型柴油机磨合过程的影响，光谱分析和颗粒粒度分析结果表明：1号机和3号机磨损性元素Fe，Cu，Al和Pb的含量在25～30min有一个明显下降量，说明柴油机润滑油完全经过滑油滤器的循环周期约为25min．由于3台机使用的是国产CD40润滑油，所有磨损性元素Fe，Cu，Al和Pb的含量在45min的磨合过程中均呈上升趋势，表明45min后仍未达到良好的磨合结果．同时，铁谱分析也证实了光谱分析和颗粒计数的结果．