高职高专液压与气动课程教学改革探索

本文主要从教学目标、教学内容与方法、师资结构、教学设备等方面着手,对本课程传统教学模式进行改革初探,力求培养更多适应社会市场需要的高技能专业人才。     

US budget impact of increased payer adoption of the Flexitouch advanced pneumatic compression device in lymphedema patients with advanced chronic venous insufficiency and multiple infections

Aims: To assess the budget impact to a US commercial health plan of providing access to the Flexitouch (FLX) advanced pneumatic compression device (Tactile Medical) to lymphedema (LE) patients with either comorbid chronic venous insufficiency (CVI) or frequent infections.

Methods: Budget impact was calculated over 2 years for a hypothetical US payer with 10-million commercial members. Model inputs were derived from published sources and from a case-matched analysis of Blue Health Intelligence (BHI) claims data for the years 2012–2016. To calculate the budget impact, the Status Quo budget (i.e. total cost for LE and sequelae-related medical treatment) was compared to the budget under each of three Alternate Payer Policy scenarios which assumed that a sub-set of patients was redistributed from their initial treatment groups to a group that received FLX. Model outputs included cumulative payer costs, net budget impact, and breakeven point. Sensitivity analyses were performed to assess the impact of model inputs on results.

Results: Increasing access to FLX yielded a favorable budget impact in every scenario. For LE patients with comorbid CVI, the three alternate scenarios resulted in cumulative 2-year budget impacts of –$52,841, –$173,317, and –$375,601, respectively. For LE patients with comorbid frequent infections, the three alternate scenarios resulted in cumulative 2-year budget impacts of –$192,729, –$259,339, and –$613,179, respectively.

Limitations: Use of claims data assumes accurate coding and does not allow one to control for disease severity or treatment adherence. Also, the distribution of patients between treatment arms was determined using claims data from a specific payer organization, and could differ for health plans with different coverage policies.

Conclusions: While previous studies have illustrated cost savings with adoption of FLX, US commercial health plans may also achieve tangible cost savings by expanding access to FLX for LE patients with comorbid CVI and multiple infections.     

风选回收烟丝回掺利用对卷烟质量的影响

为高效回收利用卷烟机剔出梗签中的烟丝,应用风选工艺进行试验。以风选剔出物中含丝率为衡量指标,对风选工艺条件进行了优化,并比较了不同回掺比例对烟丝结构、卷制物理指标和卷烟感官质量的影响。结果表明,最佳工艺条件为:(1)一次风选风门开度选用12格,此时剔出梗签含丝率为32.09%;二次风选风门开度定为10格,剔出梗签中含丝率降至9.58%。(2)将二次风选回收烟丝按照3%、6%、9%的外掺比例在掺配工序均匀回掺至正常生产的烘后叶丝中,针对加香后烟丝、主要卷制物理指标、常规烟气指标和感官质量进行评价,3%回掺与对照批对比差异不大。采用二次风选回收工艺,按3%～5%比例回掺应用于卷烟中可在保持原有品质的前提条件下降低物料消耗。     

一种矿井风门气动控制闭锁装置的设计

在煤矿井下作业时,行人、行车会对巷道通风系统产生一定影响,给职工生命安全带来威胁。文章设计了一种矿井风门气动控制闭锁装置,闭锁功能由控制部分、气缸及相关机械装置实现,同时该装置配备了红外线传感器监控与语音系统,能够实现自动互锁防止入风短路,并且具有风门开启灵活、方便、安全的特点。     

气动仪表试验台的设计与应用

摘要：本试验台不仅能检验电气阀门定位器,而且也能对其它气动仪表进行校准,如：气动差压变送器、气动压力变送器、气动温度变送器、气动调节器、气动记录调节仪、电气转换器、气动色带指示仪等等气动仪表的校准,应用范围十分广泛。     

火电厂气力除灰节能控制系统设计与开发

介绍火电厂气力除灰的系统现状,设计开发了气力除灰节能控制系统,优化了气力除灰系统各输送单元的运行组合及工作过程,从而进一步降低了用气系统用气流量波动的随机性,提高了其用气过程的规律性,改善了现有气力除灰系统控制方式的控制性能低、能耗浪费严重的问题。     

YQS-B液压气动综合实验台在教学中的应用

该实验台是根据《液压气动传动》、《气动控制技术》等通用教材设计而成可进行常规的气动、液压基本控制回路实验,还可进行液压,气动组合应用实验及液压、气动技术课程设计。本文介绍了该综合实验台的组成特点以及在《液压与气压传动》教学中的应用,使学生能直观的认识传动原理,更进一步的掌握液气压控制知识。     

浅析《液压与气压传动》课程的教学实践

<液压与气压传动>课程是职业学校机械类专业的必修课程,它涵盖内容比较广,难度也大,涉及的知识面很宽,与现实生活联系很深;对学生动手能力的要求也极高.根据这些特点,在教学活动中,应利用各种教学手段来培养学生的学习兴趣,主动探究的能力.     

气力除灰实际应用中应注意的事项

目前,国内大型火电厂基本上实现除灰系统的国产化,但由于气力除灰系统本身的复杂性,我国大型火力发电厂在气力除灰系统的实际运用中仍然面临一些问题。文章将从如何保证系统运行顺畅和出力正常,节能降耗与布袋除尘器的除灰系统设置,低温状态除尘器下的封闭及输灰管道的保温这3个重点出发进行研究和探讨。     

一种基于比例阀的气动位置控制系统探讨

该文设计了一种基于比例阀的气动位置伺服控制系统,采用PID控制和最优状态反馈控制器对系统进行调节。实验结果表明PID控制器存在一定的超调,系统的抗干扰能力差;最优状态反馈系统性能稳定、超调小、响应快,系统抗干扰能力强。