煤矿风险管理技术保障体系研究与应用

针对煤矿风险管理现状,探讨了影响煤矿风险管理技术保障体系的主要因素,建立了煤矿风险管理技术保障体系模型,并根据中国平煤神马集团现存的主要安全问题,采用风险管理和系统工程学的方法识别分析煤矿企业生产过程中的各种风险,建立了适合于中国平煤神马集团有关矿井的主要的煤矿风险管理技术保障体系,开发了煤矿风险管理技术保障体系及软件,并且在中国平煤神马集团有关矿井得到应用,使煤炭生产主要过程的风险处于受控状态,取得了良好的效果,实现了安全生产。     

Optical diffraction gratings embedded in BK-7 glass by low-density plasma formation using femtosecond laser

The optical embedded diffraction gratings with the internal refractive index modification in BK-7 glass plates were demonstrated using low-density plasma formation excited by a high-intensity femtosecond (130 fs) Ti: sapphire laser (λp=790 nm). The refractive index modifications with diameters ranging from 400 nm to 4 μm were photoinduced after plasma formation occurred upon irradiation with peak intensities of more than 1×1013 W/cm2. The graded refractive index profile was fabricated to be a symmetric around the center of the point at which low-density plasma occurred. The maximum refractive index change (Δn) was estimated to be 1.5×10-2. Several optical embedded gratings in BK-7 glass plate were demonstrated with refractive index modification induced by the scanning of low-density plasma formation.     

中原油田调整井钻井液配套技术

随着中原油田近几年定向调整井、加密井的增多。地层压力系统出现紊乱,地下已形成多套压力层系,加之注采井网密度过大．整个油田的压力系统处于难以掌握的混乱状态。钻井中因漏而塌、因塌而卡,由防漏导致出水,因压井而诱发井漏等复杂情况时有发生。针对濮城、文东区块的地质特点,制定了“调整井钻井液综合配套技术”．该技术包括防漏堵漏技术、防卡润滑技术、防塌技术、流变性控制及清砂工艺、防渗水措施等一系列配套技术。     

几种栽培花卉基质的理化特性研究

对几种重要的花卉栽培基质的理化性质进行了测定,结果表明:岩棉的通透性能很好,几乎不含有效养分、无缓冲能力。泥炭本身含有一定的养分,大小孔隙度、容重适度,总盐含量适中,有一定的缓冲能力。椰糠的总盐含量和水溶性盐含量过高,在使用前必须进行处理。泥炭、椰糠采用混合基质后,理化性质有所改善。蛭石:珍珠岩(V:V=1:1)的保水力相对较差。在生产中,除考虑基质的上述理化性质即实用性外,还必须根据经济性的原则考虑基质的选择。     

Effect of calcium on inclusions in titanium containing microalloyed steel

The inclusions in titanium containing microalloyed steel with different calcium contents were studied by metallographic microscope, SEM and EDS, to explore the influence of calcium content on the species, size, quantity and morphology of inclusions. The results show that size and quantity of non metallic inclusions in the steel decrease, and the inclusion clustering is alleviated after 0.13% calcium treatment. Part of Ti content in the inclusion of microalloy steel can be reduced, and the recovery rate of Ti is improved after 0.25% calcium treatment, so as to reduce the harm of inclusion and the production cost.     

Coordinated formation control of multiple nonlinear systems

A general method of controller design is developed for the purpose of formation keeping and reconfiguration of nonlinear systems with multiple subsystems, such as the formation of multiple aircraft, ground vehicles, or robot arms. The model consists of multiple nonlinear systems. Controllers are designed to keep the subsystems in a required formation and to coordinate the subsystems in the presence of environmental changes. A step-by-step algorithm of controller design is developed. Sufficient conditions for the stability of formation tracking are proved. Simulations and experiments are conducted to demonstrate some useful coordination strategies such as movement with a leader, simultaneous movement, series connection of formatiom, and human-machine interaction.     

微粒群多元最优信息的模糊自适应规划算法

在静态的微粒群多元最优信息规划模式的基础上，提出了微粒群多元最优信息的模糊自适应规划算法．该算法将模糊逻辑引入微粒群多元最优分布状态的动态规划，以实现多元最优信息间规划比例在寻优过程中的自适应调节，从而能够更大程度地改善其总体寻优性能．以最优和次最优分布信息的规划为例，构造了一种基于单变量两维状态输入模糊控制结构的微粒群模糊自适应规划引导器，并加以仿真计算．     

发电企业绩效评估问题分析及其静态评估方法

发电企业绩效评估是厂网分开后发电企业面临的一个重要课题。对发电企业绩效评估问题的构成、难点及现有研究成果所处的位置做了深入剖析，并给出了静态评估和动态评估的划分方式。重点非军事化了静态评估问题，一方面，引入目标电厂的概念，建立了一种新的综合评估指标；另一方面，提出分类评估的思想，并在应用聚类K-means算未能的过程中采用了一种简洁的确定聚类有效性的新标准，最终形成了多电厂绩效的综合比较方法和多电厂经营效果的分类评估方法。通过分析和实例说明，只有二者结合起来才能完成对发电企业科学有效的评估。     

电厂燃煤锅炉NOx排放计算模型的建立

抛弃了传统的建立在湍流模型和气固两相流模型基础上的NOx排放质量浓度计算方法，运用统计学的方法，建立了NOx排放质量浓度的多元回归计算模型。模型的建立是从锅炉运行因素出发，通过分析各种运行因素对锅炉效率和NOx排放质量浓度的影响，归纳出影响锅炉效率和NOx排放质量浓度的综合性影响因素——炉内风分配，并将其量化，从而建立起锅炉NOx排放质量浓度的多元回归计算模型。通过此模型可由各运行因素预测锅炉的NOx排放质量浓度。以此模型为基础可开发出应用于切圆燃烧煤粉锅炉的“NOx排放优化运行与在线监测软件”，在线指导运行人员优化燃烧，实现高效低NOx燃烧运行。该模型是针对某一特定锅炉建立的，但其建立方法对各种四角切圆燃烧锅炉具有普遍意义。     

锂离子蓄电池材料LiMn2O4的循环性能和结构关系

LiMn2O4的XRD衍射谱中,(311)、(400)衍射峰强度比变化和Li离子、Mn离子在结构中位置变化有关,而Li和Mn的位置直接影响锂离子蓄电池的充放电循环性能.所以从(311)、(400)衍射峰的强度变化可以推知以LiMn2O4为正极的锂离子蓄电池循环性能变化.