REGULATION OF INTESTINAL DYSBACTERIOSIS OF BURNED RATS BY MICROECOSYSTEM REGULATORS

Intestinal infection is a major type of traumat-ic infections[lj. Intestinal dysbacteriosis is one ofreasons which cause the translocation of intestinalconditioned pathogen and endotoxin, and subse-quently intestinal infectionL2j. To correct dysbacte-riosis quickly and to recover intestinal micro--e-cosystem are important ways in the control of trau-matic infection. Synbiotics and probiotics are regu-lators of intestinal micro--ecosystem['3,no report ontheir use for the treatment of intestinal…     

大骨节病X线诊断的一致度分析

本文报道了两组Ｘ线诊断者对１９４例大骨节病Ｘ线诊断的一致度分析结果。结果表明，大骨节病干骺端与骨端Ｘ线病变、病例诊断的一致率分别为８９．７４％、９０．２１％、９０．２１％，Ｋａｐｐａ值在０．７６～０．８０间，证明两组诊断者应用现试行的Ｘ线诊断标准的诊断一致度属于极好范围。同时发现诊断的不一致率在９．７８％～１０．２６％间，其主要原因是难以鉴别掌指骨干骺端与骨端的早期Ｘ线征与正常变异。作者认为建立一个大骨节病Ｘ线诊断的标准图谱将会提高诊断的一致度和准确性。     

某集装箱船推进性能的数值预报

分析了船体兴波作用对推进性能的影响,提出将兴波计算从自航船模流场计算中分离的简化计算模型,并研究了船模预报实船自航点和推进因子的数值方法,同时对KCS缩尺船模推进性能进行了预报,预报结果与试验吻合较好.通过对6条不同缩尺比的KCS自航船模的计算,分析了尺度效应对推进性能预报的影响.     

基于压力传感器的便携式车型检测器

介绍了基于压力传感器的便携式车型检测器的设计过程,主要功能是测量出车辆的重量,车轴距及车速等车辆静态参数,通过相关的软件实现车型的自动识别功能。同时还阐述了传感器信号调理电路、数据采集以及处理电路的硬件结构。     

基于TDS642EVM的交通参数检测

介绍了一种将DSP应用于交通参数检测的视频监控系统。系统采用TI公司的DSP处理芯片TM320DM642作为处理器,配合FPGA,视频解码芯片SAA7115H、编码芯片SAA7115,共同来完成对各种交通参数的采集,以及实时车道现场视频数据的远程获取。基于TMS320DM642芯片设计的评估开发板TDS642EVM,给出了处理器TM320DM642的编程方案,在PC上利用Visual C＋＋进行界面设计,对DSP发送的数据进行分析处理与显示,并显示出交通参数的检测结果。     

汽车灯具欧美中三大标准中环境试验的对比分析

对比分析国标、EEC指令／ECE法规和SAE标准中汽车灯具环境试验的内容和技术要求,为国内试验和出口认证试验提供参考。     

离心式净油机在盾构施工中的应用

盾构机由于其特有的施工工艺,动力驱动基本上都是通过液压系统进行,液压系统能否稳定运行直接关系到盾构施工的效率,根据以往施工经验,液压系统的故障有相当部分是由于液压油的不洁净引起的,因此提高液压油的清洁度等级,是保证液压系统稳定运行的关键。从提高液压油的清洁度入手,采用离心式净油机,在盾构机最关键的油箱位置,进行旁路循环净化,经过2个月的实际运行,液压油的清洁度得到了明显提高,液压系统保持稳定,液压油、滤芯消耗大幅度降低,效果显著,这项技术改造对于类似盾构机液压系统的设备改造具有借鉴意义。     

Modeling on spare parts inventory control under condition based maintenance strategy

In order to optimize the spare parts inventory, we present a decision-making model under condition based maintenance policy for a single equipment system subjected to continuous and random deterioration. Firstly, a probability model of the spare parts support is established, according to the requirement of a predetermined probability of stockout. It can determine the optimal spare parts stock level. Secondly, the spare parts ordering decision is made according to the equipment deterioration level, and it can optimize the spare parts ordering. The objectives of this model are to minimize the spare parts inventory, and the expected total operating cost. Thirdly, a numerical example is given to illustrate this model. The results prove that the optimal preventive maintenance threshold obtained from the proposed model can satisfy the spare parts support requirements.     

Topology optimization design and strength analysis of the hoist bracket for rescue helicopters

The hoist bracket links the rescue hoist with the helicopter cabin, and its structure design greatly affects the operation convenience and safety of the hoistman and lifeguard in the rescue process with a helicopter.This paper firstly builds the force model of the hoist and bracket, and gives five kinds of typical working conditions as the design ones of the bracket. Then this paper puts forward a design process of the hoist bracket based on the topology optimization and strength analysis with the 3D modeling and finite element analysis. This design process can make the bracket’s structure lightweight by achieving the optimal material layout under the conditions of maximizing the static stiffness or minimizing the compliance of the bracket. And this improves the dynamic performance of the helicopter, and reduces the fuel consumption and cost under the strength constraints. Finally,taking the design of the hoist bracket used in a rescue helicopter as an example, this paper illustrates the proposed model and method. The analysis results show that the mass of the hoist bracket decreases by 12.5% while the static stiffness of the hoist bracket is achieved. The optimization design results meet the strength requirements of the hoist.