共查询到20条相似文献,搜索用时 62 毫秒
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元器件在进行振动、冲击和碰撞试验时,试样安装至关重要。作者针对试样本身有关安装结构,介绍其不同安装方法。夹具是安装试样,进行机械环境试验的重要工具。探讨夹具的材料,制造方法及其动态鉴定。还论及夹具的安装要求。 相似文献
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安装性维修性是产品可靠性的重要组成部分,也是家用空调产品的重要质量特性之一,当前行业内对安装性维修性没有完整的设计、改进、试验及评价。本文通过从市场现状调研为切入点,剖析了空调安装性维修性痛点问题,而后提出了提高家用空调安装性维修性在全生命周期的中开展思路,并制定了安装性维修性的试验及评价,以此提高产品的可靠性。 相似文献
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振动冲击试验夹具设计技术研究与实践 总被引:2,自引:0,他引:2
阐述了夹具在振动冲击试验中的重要作用和振动冲击试验对夹具使用的材料、尺寸、重量、力学特性、加工制造、安装和连接等要求,介绍了夹具设计的具体过程和测量分析技术,包括确定夹具设计目标参数、搜集相关信息、具体设计步骤和对所设计制造的夹具的传递特性等进行测量和分析的方法。 相似文献
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普光高含硫气田水中H2S去除技术研究 总被引:2,自引:2,他引:0
文章探讨了通常用于水中H2S去除的方法,对比方法的优缺点,提出以NaClO为主要脱硫剂的处理方法。通过对采出水的脱硫氧化剂优选试验、NaClO连续脱硫试验,并将试验研究结果应用于普光高含硫气田水脱硫处理。试验证明:采用NaClO可以安全、高效地去除采出水中的H2S,处理后的气田水中硫化物的含量小于1mg/L。 相似文献
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为了探讨火电厂除灰水中的粉煤灰(含炉渣)对炼油厂含碱污水中石油类、COD(cr)等污染物的吸附处理效果,根据某单位现场情况,将炼油厂含碱污水送入火电厂除灰沟→经充分混合排入储灰场→并经长时间沉降分离的流程进行模拟试验,结果表明:由于粉煤灰的吸附作用,显著降低了炼油厂含碱污水中的石油类、COD(cr)、挥发酚、碳化匕物等污染物。 相似文献
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Managed drainage ditches are common in the midwestern United States. These ditches are designed to remove water from fields as quickly as possible, and sediment buildup necessitates dredging, to ensure adequate water removal. This laboratory study was conducted to determine the impact of ditch dredging on soluble phosphorus (P) transport. Ditch sediments were collected from a drainage ditch in northeastern Indiana immediately before and after dredging. The sediments were placed in a stream simulator, and stream water was loaded with 0.55 mM P for 5 d (adsorption experiment). Water was then removed, and "clean" water (no P added) was used for a desorption experiment, lasting 1 d. During the adsorption experiment, pre-dredged sediments were able to remove P from the water column quicker, and P concentrations 120 h after introduction of high P water were lower for the pre-dredged sediments (0.075 mM P) than the dredged sediments (0.111 mM P). During the desorption experiment, P was released to the water column slower in the pre-dredged treatment than the dredged treatment (instantaneous flux at t = 0 was 0.205 microM P h(-1) for pre-dredged and 0.488 microM P h(-1) for dredged). This occurred despite higher Mehlich 3-extractable P in the pre-dredged sediments than the dredged sediments. Equilibrium phosphorus concentrations (EPCo) were lower in the pre-dredged sediments during both adsorption and desorption experiments. Transport of soluble P immediately after dredging will likely increase in drainage ditches; however, dredging is a necessary management tool to ensure adequate discharge of water from surrounding fields. 相似文献
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通过某种产品的二次筛选试验前后的参数数据分析,从一个侧面分析了二次筛选试验对产品造成的影响,定量地表征了影响的程度,为以后的二次筛选乃至一次筛选对产品寿命影响的全面分析奠定基础。 相似文献
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“大肠菌群”是水质污染的指示菌,测定大肠菌群的方法主要有多管发酵法、滤膜法。多管发酵法实验周期较长,适用于较复杂的水样检测。本文对多管发酵法实验过程中的一些具体问题、如革兰氏染色法中的注意事项、初发酵24h内产酸不产气样品的处理,多管发酵法操作步骤是否可简化等、结合实践经验进行了讨论和分析。 相似文献
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The patterns of living, planning, and resource utilization as practiced in Western countries for decades are not sustainable; change of some sort is essential. But what changes are appropriate, and, perhaps more important, will people accept them? The small experiment framework provides a strategy for meeting the challenge of change. By encouraging participation, limiting the scale of initial change, and incorporating some aspects of the familiar, many of the difficulties that make change so problematic can be mitigated or even eliminated. An exploration, from a psychological perspective, of the characteristic difficulties surrounding potential change provides the context for a discussion of the components of the small experiment and an analysis of how these elements address these characteristic challenges. A comparison to adaptive management is drawn, and several concrete examples illustrate how the strategy has been used successfully to address a variety of environmental problems. 相似文献