发动机动态试验台的优化设计

在应用电涡流测功器开发适用于轿车的发动机动态试验台过程中，以上海Ｓａｎｔａｎａ２０００模拟ＥＳＥ１５工况为例，对试验台控制系统的重要参数进行设计，对仿真结果失 及与底盘测功器实测车速轨迹的对比，证明了优化的效果。     

纵倾船舶的稳性计算方法

鉴于目前国内尚无纵倾船舶的初稳性及大倾角稳性的计算程序,为满足实际使用需要,本文对此作了研究,提出了关于纵倾状态下的船舶稳性计算方法,并编制电算程序,给出了四艘船在各种装载状态下的稳性计算实例。结果表明:本方法的实用性和可靠性是令人满意的。     

乳化沥青生产线微机—PC控制系统

本文简要介绍了乳化沥青生产的工艺流程,选择了由微机-PC 联合控制系统作为整个乳化沥青自动化连续生产的方案.结合乳化沥青的生产,从原理、硬件的配置、软件的编制等方面,对微机控制系统,PC 逻辑控制系统进行了详细阐述.     

提高车轮压装作业中的压入力与质量的研究

随着新系列车辆陆续投入运营,承担维修任务的综合车辆中心的车轮装卸作业陡增。由车轴退轮、车轮维修、车轮压装(压入)等工序组成的车轮装卸作业迫切要求提高效率与质量。文章介绍了车轮压装作业中常发生的压装力不足,甚至返工的问题,经过调查分析,查找其真实原因,确认了轮毂孔表面粗糙度Ra≥1.9μm时,重新压装率会增加。为抑制压装力偏差,镗孔表面由车削加工改用珩磨处理可解决镗孔表面精加工问题。     

地铁环境控制系统建模与神经网络修正

从传热机理出发建立地铁环境控制系统的初步模型.在此模型结构基础上进一步用BP算法对系统进行辨识,获得了较好的辨识效果.机理模型和神经网络模型分别应用于系统开发的实验室阶段和现场调试阶段,贯穿地铁环境控制系统开发的整个周期.     

彭莫山隧道通风系统综合节能降耗研究

针对彭莫山隧道通风系统耗能大的状况,对彭莫山隧道通风系统设备的轴流风机进行了重新设计及改造,结合变频技术,将系统的启动控制由软启动更改为变频启动及运行,并设计了一套耗电量、风量数据采集方案。经新系统的运行效果表明,新系统运行稳定,节能降耗效果非常明显。     

高铁长沙南枢纽改造工程实施方案研究

研究杭长客专引入武广高铁长沙南站改造工程施工方案;提出客专枢纽改造工程信号过渡施工和分步实施的方法,以及施工的关键措施,对其他的客专枢纽改造工作具有借鉴意义。     

DETERMINATION OF URINE TUMOR NECROSIS FACTOR, IL-6, IL-8 AND SERUM IL-6 IN PATIENTS WITH HEMORRHAGIC FEVERS WITH RENAL SYNDROME

Objective To explore the roles of cytokines in the pathogenesis of hemorrhagic fever with renal syndrome（HFRS）. Methods Double-antibody sandwich ELISA was used to determine serum interleukin （IL）-6, urine tumor necrosis factor （TNF）, IL-6 and IL-8 levels in 56 patients with HFRS. Results Serum IL-6, urine TNF, IL-6 and IL-8 concentrations in HFRS patients were significantly higher than those in control group, respectively （P〈0. 001）. The concentrations increased at fever stage, then continued to increase during hypotension stage and peaked at oliguria stage. The concentrations of serum IL-6, urine TNF, IL-6 and IL-8 increased in accord with the severity of the disease and differed greatly among different types of the disease. Serum IL-6 had remarkable relationships with serum specific antibodies. It was positively related to serum β2 -microglobulin （β2 -MG）, blood ureanitrogen （BUN） and creatinine （Cr）. Significant positive relationships were also found both between urine IL-6 and TNF, and between IL-6 and IL-8 （r=0.5768, P〈0.05; r=0. 3760, P〈0.01）. Conclusion TNF, IL-6 and IL-8 activated during the course of the disease. IL-6 is associated with the immunopathological lesions caused by the hyperfunction of humoral immune response. IL-6, IL-8 and TNF are involved in the renal immune impairment. Determining them might, in certain extent, be used in predicting the prognosis and outcome of patients with HFRS.