浅谈瓦斯抽采与曲江、尚庄两矿的生存与发展

在当前煤炭行业大环境下,曲江、尚庄两矿只有进行创新改革才有发展出路。改进瓦斯抽采工艺是实现生产效率、经济效益双提高的根本途径,是实现煤矿安全高效发展的必然要求。     

高温车用燃料电池的发展及现状综述

燃料电池车以其能量转化效率高、绿色环保、噪音低等优点，被认为是替代传统化石能源汽车最有前景的新能源汽车。目前车用燃料电池的工作温度一般都低于80℃，低温的工作环境使其面临着诸多问题，如复杂的水管理和CO中毒等。通过提高质子交换膜燃料电池（PEMFC）的工作温度可以缓解这些问题，提高燃料电池的性能。然而，高温的工作环境也会对燃料电池带来诸多挑战，如膜脱水、催化剂团聚、冷启动速度缓慢等。要促进高温（90～120℃）车用燃料电池的快速发展，需要对其问题及解决方法进行分析。本文从电堆比功率、膜电极、双极板、进气方式、加湿方式等方面，介绍燃料电池的发展现状及存在的问题，包括Nafion膜和催化剂的热稳定问题、双极板的耐腐蚀问题、流道的气体分配问题、进气方式和加湿方式的优化以及冷启动问题。指出通过掺杂亲水性氧化物改善Nafion膜的高温性能；将Pt合金化及采用介孔炭提高催化剂的稳定性和电化学活性；镀层不锈钢金属双极板可以增强耐腐蚀性；3D流场等新型流场结构及提高进气温度、速度可以提高气体的均匀性；采用自增湿方式可以简化电堆结构等解决方法，以期对燃料电池车的进一步发展起到引导作用。     

年处理100万t中低品位磷矿高效清洁生产工艺

中低品位磷矿高效清洁综合利用是中国基础磷化工产业发展中遇到的共性瓶颈问题。以中低品位磷矿磷-钙-镁一体化综合利用中试成果为基础,通过创新集成技术对中低品位磷矿直接进行处理,获得高品质磷精矿[w（P₂O₅）≥36%、w（MgO）≤0.5%]可用于任何湿法磷酸及热法黄磷生产工艺,同时回收高附加值的氢氧化镁和轻质碳酸钙。该工艺磷全部回收、无尾矿产生、实现了废水近零排放,项目的实施对推动中国磷化工产业可持续发展及从源头解决“三磷”问题具有重要意义。     

中国无机盐工业发展现状及展望

建国70 a以来中国无机盐工业发展迅猛,取得了巨大成就,中国已成为世界上最大的无机盐生产、出口和消费国。分析了中国无机盐工业生产现状和进出口情况,指出行业存在大宗产品产能过剩、产品精细化率偏低、产业集中度和资源配置率偏低、矿产资源保障能力不足、节能减排任务重、自主创新能力弱等问题,并提出未来发展建议及发展方向。新能源用无机材料、无机粉体功能材料、5G通迅用无机材料、电子化学品和电镀化学品等专用化学品将是未来无机盐工业发展的热点。随着产业链现代化水平的不断提升,将会逐渐实现行业规模化、绿色发展与安全生产。     

Synthesis,densification and characterization of Ag doped ceria nanopowders

Nanosized Ag-doped ceria (Ce_1-xAl_xO_2-δ)powders (0.1 ≤ x ≤ 0.04) were obtained by self-propagating room temperature reaction. The solid solubility of Ag into ceria lattice was the highest reported so far. X-ray diffraction analysis and field emission scanning microscopy results showed that the doped samples are single phase solid solutions with fluorite-type structure and all prepared powders were nanometric in size. The average size of Ce1-xAgxO2-▯ particles lies at about 4 nm. Raman spectra revealed an increase in the amount of oxygen vacancies with the increase of Ag concentration, such as is foreseen. The thermal stability of solid solution was followed by XRD. Microstructure development was studied by scanning electron microscopy. By controlling the processing variables, it was possible to obtain high density samples with homogeneous microstructure at low sintering temperature.     

全电动注塑机研究进展及在汽配电子行业中的应用

介绍了全电动注塑机的特色，综述了国内外全电动注塑机在精密注塑、智能注塑、高效注塑和绿色注塑方面的研究进展，并对全电动注塑机在汽配电子行业中的应用作了简单介绍。对双电机同步控制技术的逐渐成熟为全电动注塑机实现大型化提供了助力，全电动注塑机高效、精密、智能、节能、环保的优势在汽配电子行业显示了很好的应用前景。     

地方高校发展规划编制方法与思路的探索研究

地方高校发展建设不断面对新的机遇和挑战，能否科学的制定并实施发展规划，对高校的发展具有重要的战略意义。规划编制要对内容与方法不断探索研究，是总结上一规划制定及执行情况，对学校内外发展形势准确剖析，是明确学校今后一段时间的建设任务和建设发展目标的理性探究。     

以产业发展推动乡村振兴的对策探讨

通过乡村振兴,提高农民生活水平,达到产业兴旺、乡风文明、生活富足的主要目标,是农村经济的主要发展发向。产业发展是乡村振兴的基础,只有在产业发展中使乡村经济激活,才能带领广大农民实现脱贫致富。在产业发展的过程中,需要调节好政府与市场的关系,保证生产要素能够流入到农村中来,同时加强农村的基础设施建设,提高经营主体的综合素质,加强产业融合,不断发展新兴特色产业,最终推动乡村振兴。文章主要论述了农村产业发展中存在的一些问题以及对策。     

A systematic review on the relationship between user involvement and system success

ContextFor more than four decades it has been intuitively accepted that user involvement (UI) during system development lifecycle leads to system success. However when the researchers have evaluated the user involvement and system success (UI-SS) relationship empirically, the results were not always positive.ObjectiveOur objective was to explore the UI-SS relationship by synthesizing the results of all the studies that have empirically investigated this complex phenomenon.MethodWe performed a Systematic Literature Review (SLR) following the steps provided in the guidelines of Evidence Based Software Engineering. From the resulting studies we extracted data to answer our 9 research questions related to the UI-SS relationship, identification of users, perspectives of UI, benefits, problems and challenges of UI, degree and level of UI, relevance of stages of software development lifecycle (SDLC) and the research method employed on the UI-SS relationship.ResultsOur systematic review resulted in selecting 87 empirical studies published during the period 1980–2012. Among 87 studies reviewed, 52 reported that UI positively contributes to system success, 12 suggested a negative contribution and 23 were uncertain. The UI-SS relationship is neither direct nor binary, and there are various confounding factors that play their role. The identification of users, their degree/level of involvement, stage of SDLC for UI, and choice of research method have been claimed to have impact on the UI-SS relationship. However, there is not sufficient empirical evidence available to support these claims.ConclusionOur results have revealed that UI does contribute positively to system success. But it is a double edged sword and if not managed carefully it may cause more problems than benefits. Based on the analysis of 87 studies, we were able to identify factors for effective management of UI alluding to the causes for inconsistency in the results of published literature.     

Agent-based monitoring service for management of disruptive events in supply chains

Schedules of supply chains are generated with buffers to absorb the effect of disruptive events that could occur during their execution. Schedules can be systematically repaired through specific modifications within buffers by using appropriate decision models that consider the distributed nature of a supply chain. To this aim, information of disruptive events at occurrence or in advance allows decision models to make better decisions. To detect and predict disruptive events along a schedule execution, a service-oriented monitoring subsystem that uses a reference model for defining monitoring models was proposed. This subsystem offers services for collecting execution data of a schedule and environment data, and assessing them to detect/anticipate disruptive events. Because of the distributed nature and the complexity of these services functionalities, this paper presents an agent-based approach for their implementation. This technology allows dealing with supply chain monitoring by structuring monitoring subsystem functionalities as a set of autonomous entities. These entities are able to perform tailored plans created at execution time to concurrently monitor different schedules. A case study is described to try out the implemented prototype system.