利用列车运行监控记录装置实现装置自身管理

如何突破“人盯人”的旧管理模式,建立一套层次清晰,责任分明,高效灵活,又能实现管理者对现场作业实时监控的新型管理模式,这是监控记录装置运用于铁路安全生产以后,困扰监控管理人员的一个难题。在工作实践的基础上,总结出的一种独特的管理方式解决了这一难题。     

COMOS-D2型柴油机工况监控和数据记录系统

<正> 一、前言为了发展在世界海运市场上具有高度竞争能力的船舶,各公司已研究成功高度自动化船舶,只需极少数船员就能正常运行,而不影响航运效率和安全。预期今年年底前,一艘只需十八个船员的高度自动化船将交付使用。目前世界造船的发展趋势是船员人数愈来愈少,而轮机部门的发展趋势更是如此。机舱需要人员现场观察管理;由于燃油种类增多和使用劣质燃油而增加了主机维护管理的工作。在这些工作中主机的维护管理占了相当大的比例。因此,人们致力于提高主机的可靠性、简化检查和维修工作,并把大部份的维修工作转移到陆上进行。最近,还对柴油机进行预防性维修的监控系统倍加关注。     

LKJ2000型机车监控装置柴油机转速记录抖动故障的分析

对LKJ2 0 0 0型机车监控装置在运用中出现的柴油机转速记录抖动现象 ,进行了深入的调查分析并制定解决措施 ,经实施 ,收到了较好的效果。     

浅析DF4型机车电路干扰对LKJ-93型监控装置的影响

我段于2002年5月开始在货运DF4型机车上全面安装LKJ-93型监控装置.     

监控记录装置故障原因分析及解决措施

对LKJ—93A型列车监控记录装置产生影响列车运行安全的故障进行了分析,并提出了相应的解决措施。     

LKJ-93A列车运行监控记录装置系统故障分析

根据多年来LKJ 93A监控装置的运用和检修经验,探讨LKJ 93A列车运行监控记录装置发生系统故障的主要原因,并提出一些切实有效的解决方法。     

工矿调车机车运行监控记录装置试验台的研制

根据机车的作业模式,研制了符合调车机车用的监控装置试验台。该试验台具有使用简单、运用可靠的特点,确保了监控装置各部件能够定期测试及故障配件的维修,也确保了行车安全。     

LKJ2000型监控记录装置软、硬件存在的问题及解决措施

对LKJ2 0 0 0型监控装置软、硬件在我段使用过程中存在的几个主要问题进行了探讨 ,并提出了有效的解决方法。     

浅谈JK00430型机车走行部车载监测装置的应用体会

介绍了JK00430型机车走行部车载监测装置的基本构成和在实际应用中取得的效果,并对该监测装置的可靠性进行了客观评价。     

利用列车运行监控记录装置快速判断机车电气常见故障

分析了DF系列内燃机车电气故障的特点,并结合LKJ-2000型列车运行监控记录装置的部分特性,提出了利用列车运行监控记录装置快速判断机车电气常见故障的思路。     

Long-term monitoring of photovoltaic devices

For photovoltaic (PV) devices to operate successfully over an expected lifespan of 30 years, much research is needed in all aspects of these devices. This study is concerned with the monitoring of the performance and degradation of PV devices over extended periods as well as the effect of meteorological conditions on device performance. The PV devices used in this study comprise different cell technologies and designs. The performance of conventional flat plate modules was monitored over a 15-month period and that of a PV concentrator array over a 13-month period. The results of this performance monitoring are presented in this paper. Degradation mechanisms of PV devices are also discussed. This study showed that, as expected, the power ratings of PV devices do not usually give an accurate indication of their performance outdoors. Results obtained also showed that meteorological conditions could cause an 18% reduction of a module's potential power. A degradation monitoring procedure revealed potential degradation mechanisms, such as mismatched cells, hot spot formation and low cell shunt resistances on some modules. A comparative study on the PV concentrator modules showed that the concentrator modules produced much less energy than their rated energy when operating outdoors. The energy performance of a tracked flat plate module vastly exceeded the concentrator modules' performance.     

H2O2作添加剂对SNCR脱硝工艺的影响

为了改善选择性非催化还原(SNCR)脱硝工艺的反应特性,以H2O2为添加剂,对SNCR过程进行了实验研究。在小型SNCR实验台上进行实验,以N2作为载气,以纯NO模拟NOx气氛,初始NO浓度为360μL/L,O2=4%,H2O=8%,NSR=1.5。通过对实验结果进行分析,得到H2O2对低温下的脱硝率有促进作用,对最大脱硝率以及最佳脱硝温度没有影响,最大脱硝率依然为80%左右,最佳脱硝温度为925℃。另外还分析了H2O2对NH3浓度、HNCO浓度、NO2浓度、N2O浓度以及N2转化率的影响及其原因。     

光催化法对分解硫化氢制氢的影响

文中采用波长为253.7 nm的紫外光为光源,以Na2S/Na2SO3混合水溶液作为反应介质,采用不同种的光催化剂进行紫外光液相分解硫化氢(H2S)制氢反应。考察了不同种紫外响应的光催化剂对产氢的影响、TiO2-P25光催化剂、TiO2-P25光催化剂加入量、焙烧温度对ZnO光催化剂活性对产氢的影响。研究结果表明,加入光催化剂有助于反应的进行,使反应的产氢量有所提高,不同的光催化剂对分解硫化氢制氢的影响不同;TiO2-P25光催化剂其分解Na2S溶液与紫外光子激发HS-有协同作用;250 mL 0.1 mol/L Na2S水溶液中最佳催化剂用量为0.05 g;不同焙烧温度下制得的ZnO光催化剂对反应体系的产氢速率影响较大,随着焙烧温度的提高,反应的产氢速率也相应提高。     

列车运行监控仪辅助装置的改造方案

介绍了LKJ-93列车运行监控仪在运用中所存在的主要问题,并根据JZ-7型制动机的工作原理,提出了切实可行的改造方案。     

列车运行监控记录装置数据复核诊断系统的研究与应用

介绍了铁路列车监控记录装置数据复核系统的基本结构、组成和主要功能,阐述了系统硬件实现原理和软件模块.应用该系统可实现对LKJ2000型监控装置的测试、地面数据的比对复核、地面数据的曲线显示,监控模式的自动复核,运行达示控制自动验证,监控装置运行记录文件的自动回放等功能.很好地解决了监控模式复核、达示验证及地面数据开发中的繁琐、易错等问题,极大地减轻了现场工程技术工作人员的工作量,同时为准确地进行安全分析提供了良好的平台.     

Influence of equivalence ratio and H2 blended ratio on explosion propagation characteristics of DME/H2 blended gas in closed narrow space

To reveal the explosion risk and propagation law of dimethyl ether (DME)/hydrogen (H₂) blended gas, the explosion propagation characteristics of DME/H₂ blended gas under different equivalence ratio (Φ) and hydrogen blended ratio (λ) was investigated based on experimental research and theoretical analysis. The results show that the peak overpressure (P_p), the peak pressure rise rate (dP/dt)_p and the peak shock wave propagation velocity (V_p) show an increasing and then decreasing trend with the increase of Φ, and reach the maximum at Φ = 1.0. The effect of a little addition of H₂ on the explosion hazards of blended gas is small, but when λ > 10%, the explosion hazards increase significantly. The magnitude of increase of P_p, (dP/dt)_p and V_p is different with the increase of λ. Compared with the enhancement effect on P_p and (dP/dt)_p, the enhancement effect on V_p is more obvious with the continuous blend of H₂. Comprehensive analysis of the thermodynamic and chemical kinetic parameters of H₂, the chemical kinetic parameters of H₂ play a dominant role in the explosion risk of hydrogen-blended gases.     

机车监控装置运行数据整改及效果分析

介绍了机车监控装置济南地区小运转数据整改的原因、过程以及整改后的效果.     

A remarkable increase in the adsorbed H2 amount: Influence of pore size distribution on the H2 adsorption capacity of Fe-BTC

Here we show the crucial role of ultramicropores on the adsorbed H₂ amount. By synthesizing Fe-BTCs via a perturbation assisted nanofusion synthesis strategy and by the control of textural porosity via Fe:BTC ratio, BET surface area (1312 m²/g), total pore volume (1.41 cm³/g), and H₂ adsorption capacity (1.10 wt% at 7.6 bar and 298 K) were enhanced by 1.6, 3.1, and 2.6 times, respectively. The reported BET surface area, and the total pore volume are the highest of those reported for Fe-BTC, to date. The enhanced H₂ adsorption capacity of Fe-BTC-3 is attributed to the ultramicropores present in its pore structure. Presence of ultramicropores maximizes van der Waals potential, and the adsorbed H₂ amount increases. By the perturbation assisted nanofusion synthesis strategy and the control over textural porosity, an Fe-BTC that possesses a H₂ adsorption capacity higher than those of reported MOFs with higher BET surface areas has been reported.     

H2稀释在PECVD法制备微晶硅薄膜中的影响

利用等离子增强化学气相沉积（PECVD）技术，研究了H稀释度D=H2／（H2＋Sill。）对在玻璃和不锈钢衬底上低温制备微晶硅薄膜的晶化率、晶粒尺寸、薄膜质量等的影响。结果表明，随着硅烷浓度的降低，样品的晶化率、晶粒尺寸有所改变。当D=99％时，晶粒突然变大，晶化率显著提高。因此，我们认为此时的硅薄膜由非晶硅转化为微晶硅。