示功检定仪石油专用校准装置研制与应用

为满足示功检定仪等石油专用计量器具量值溯源的需要，实现量值统一，通过采用先进的数字测控技术和各种精密的测量敏感器件，研制成功了SJD—1型示功检定仪石油专用校准装置。该装置由3个开放式子系统构成，以实现多量值传递。通过对各子系统的误差分析与计算，得到了各子系统的测量不确定度。该套装置以先进的测量技术和优异的计量性能表明其完全能够用于对示功检定仪的校准。     

嵌入式linux下framebuffer显示驱动的方法

介绍了在嵌入式linux系统下利用帧缓冲控制显示芯片的方法,并以SW565R显示芯片为例进行了分析。帧缓冲是出现在linux2．2．xx内核中的一种驱动程序接口,它将显示设备抽象为帧缓冲区,通过帧缓冲区可以对显示内存进行读写,写的结果则反应在屏幕上。结果证明这种驱动显示芯片的方法能高效地应用在嵌入式系统中。     

Cost-effectiveness of percutaneous patent foramen ovale closure as secondary stroke prevention

Objective: Compared to medical therapy alone, percutaneous closure of patent foramen ovale (PFO) further reduces risk of recurrent ischemic strokes in carefully selected young to middle-aged patients with a recent cryptogenic ischemic stroke. The objective of this study was to evaluate the cost-effectiveness of this therapy in the context of the United Kingdom (UK) healthcare system.

Methods: A Markov cohort model consisting of four health states (Stable after index stroke, Post-Minor Recurrent Stroke, Post-Moderate Recurrent Stroke, and Death) was developed to simulate the economic outcomes of device-based PFO closure compared to medical therapy. Recurrent stroke event rates were extracted from a randomized clinical trial (RESPECT) with a median of 5.9-year follow-up. Health utilities and costs were obtained from published sources. One-way and probabilistic sensitivity analyses (PSA) were performed to assess robustness. The model was discounted at 3.5% and reported in 2016 Pounds Sterling.

Results: Compared with medical therapy alone and using a willingness-to-pay (WTP) threshold of £20,000, PFO closure reached cost-effectiveness at 4.2 years. Cost-effectiveness ratios (ICERs) at 4, 10, and 20 years were ?20,951, ?6,887, and ?2,158, respectively. PFO closure was cost-effective for 89% of PSA iterations at year 10. Sensitivity analyses showed that the model was robust.

Conclusions: Considering the UK healthcare system perspective, percutaneous PFO closure in cryptogenic ischemic stroke patients is a cost-effective stroke prevention strategy compared to medical therapy alone. Its cost-effectiveness was driven by substantial reduction in recurrent strokes and patients’ improved health-related quality-of-life.     

绞车排绳器设计

文章围绕绞车运输过程中反映出来的排绳不好、容易造成斜巷断绳跑车事故的问题,叙述设计适于平巷和坡度在0～25°的各类斜巷绞车的自动排绳器,用以有效地控制和预防绞车断绳、跑车事故,彻底改善矿井运输安全状况,消除斜巷运输安全隐患。     

稠油热采井冲砂工具可靠性改进与应用

针对稠油热采井高周期吞吐生产出砂问题，为提高能量亏空井冲砂作业施工效果，通过对，中砂施工工艺质量功能展开，得出了同心双管双级冲砂管柱研制思路，并依次展开设计公关，设计完成同心双管双级冲砂封隔器及施工工艺，通过对系统的故障模式与影响分析，进一步改进了设计和工艺，在十口稠油出砂井的施工试验中取得了良好的效果。     

油井泄油器故障模式分析与改进应用

通过对双河油田开发井自控式泄油器故障的统计分析,找出了该种泄油器故障产生的主要原因.针对故障原因以及油田生产实际,将原泄油器滑套控制装置改为采用密闭弹簧钢球结构,并进行故障模式分析,消除了自控式泄油器的故障原因,在现场应用后取得了良好效果.     

汽机装置开工调试阶段设备故障分析及处理措施

四川石化公用工程部自备电站汽机装置在开工调试阶段出现汽轮发电机组轴承损坏、高压给水泵抱轴、减温减压器出口短节开裂等事故,对事故原因进行分析和故障处理,达到装置安全平稳运行的目的。     

施工升降机齿轮锥鼓形渐进式防坠安全器检验方法的研究

针对施工升降机防坠安全器的检验状况,阐述了检验项目和手段,通过搭建防坠安全器检验实验平台,将检验项目如制动性能试验、安全器制动距离、齿轮转动轻便灵活性试验等逐一在检验平台上完成,并通过采集软件获得有效检验数据,对数据进行归纳、总结分析得出检验结论,最终形成一套完整的检验防坠安全器的方法。人机工作原理的专用操作控制台将各种仪器、电脑及显示器,控制器与操作按钮等布置在同一操作台内,紧凑,实用,美观,可以满足各种安全器检测的需要,整个检测过程不需人工干预,实现检测过程自动化,为今后全面开展防坠安全器的检验业务提供了技术支持。     

浅析隐藏式调节风窗在煤矿安全生产中的应用

调节风窗是采区内的主要通风设施,通过改变窗口的开口流通面积实现风量调节,而调节风窗的调节性能直接影响通风系统的风量调节效果。要合理设计和运用调节风窗进行风量调节,就必须研究其调节特性,达到有效调节风量的目的,减少影响安全生产的因素。     

医用吸引类设备检定装置的研制及应用

本文分析了国内外医用吸引类设备研究现状及存在的问题,简述了医用吸器检定装置的研制及应用实列。