基于独立成分分析的地震数据去噪

:独立成分分析方法(ICA)是近几年才发展起来的一种新的基于信号高阶统计特性的分析方法。 对于相互统计独立的信号源经线性组合而产生的混合信号,采用ICA能从其中分离出各独立的信号分量。在地震勘探中,地震道信号和随机噪音通常具备非高斯信号的特点，统计性相互独立。在对地震数据和随机噪音信号特点进行分析的基础上，采用基于最小互信息的快速ICA方法实现地震数据去噪。模型分析和实例计算表明，该方法具有一定的可行性。     

石化企业环境管理信息系统的研究和应用

为提高石化企业环境管理的工作效率，研究并开发了具有环境质量自动监测、污染源监测与预警管理、污染源智能分析、监督检查、HSE报表管理及台帐管理等功能集于一体的环境管理信息系统。该系统应用后，有效规范了各个业务流程，提高了工作效率，对促进企业安全生产和持续、稳定地发展具有重要的意义。     

地震相控非线性随机反演研究与应用

 在地震相模型控制下，通过原始数据将各个单一反演问题转化为一个联合反演问题，可降低反演在描述参数几何形态时的单个反演问题的自由度，从本质上提高地球物理反演的效果。本文在计算过程中采用了非线性随机反演算法，能有效提高地震资料的分辨率，并充分考虑地质条件的随机特性，使反演结果更符合实际地质情况。在胜利、中原油田等地区的储层预测中，应用本文方法均取得了良好的效果，为岩性油气藏勘探提供了可靠基础数据。     

Monitoring non-carbonated (‘still’) mineral waters for aerobic colonization

Fifty samples each of two leading brands of French, non-carbonated (‘still’) mineral waters, packed in plastic bottles, were stored in the dark for one month at approximately 20°C to allow marked proliferation of their autotrophic microbial flora. Upon completion of this challenge test 1250 ml per bottle were filtered through five membranes, which were subsequently cultured on 1/10 strength nutrient agar for 48 h at a temperature favouring the growth of thermotrophic organisms only, i.e. 42 ± 0.5°C. The numbers of colonies per one litre were below 10³ in all samples and did not exceed 200 in 56–80%, depending on the brand. Identification of the isolates demonstrated strong inhibition of the psychrotrophic. Gram-negative types, predominating in the association flora of stored still waters and preponderance of Gram-positive, catalase-positive, facultatively anaerobic cocci. Consequently, a Reference Value for the thermotrophic autotrophic colony count per 1 ml in still, commercial mineral waters of the order m = 1 and M = 5 seems justified. It is emphasized that, besides examining for these trivial organism, the usual tests for marker bacteria (Escherichia coli and Lancefield group D streptococci) and Pseudomonas aeruginosa should always be carried out.     

交流变频钻井泵试验台的研制

针对大功率、超高压（52MPa）钻井泵的试验问题，设计了采用交流变频控制技术，提高试验能力的试验台架。该试验台架体现了实用性、可操作性、高效节能、环保性；电气传动部分采用具有国际先进水平、成熟技术的交流变频调速系统，实现无级调速；机械传动部分采用单级双速变速箱，试验范围广；电控系统可完成对钻井泵各种参数在线监控和测定。     

一种高效可控恒流源

提出了一个设计高效可控恒流源方案.首先分析了影响其效率的各种因素,提出了提高效率的途径和方法.其次又给出应用微机实现双回路的测控方法及数学模型,该方案已成功的应用于某些专用设备中.     

Adherence clustering: an efficient method for mining market-basket clusters

We explore in this paper the efficient clustering of market-basket data. Different from those of the traditional data, the features of market-basket data are known to be of high dimensionality and sparsity. Without explicitly considering the presence of the taxonomy, most prior efforts on clustering market-basket data can be viewed as dealing with items in the leaf level of the taxonomy tree. Clustering transactions across different levels of the taxonomy is of great importance for marketing strategies as well as for the result representation of the clustering techniques for market-basket data. In view of the features of market-basket data, we devise in this paper a novel measurement, called the category-based adherence, and utilize this measurement to perform the clustering. With this category-based adherence measurement, we develop an efficient clustering algorithm, called algorithm k-todes, for market-basket data with the objective to minimize the category-based adherence. The distance of an item to a given cluster is defined as the number of links between this item and its nearest tode. The category-based adherence of a transaction to a cluster is then defined as the average distance of the items in this transaction to that cluster. A validation model based on information gain is also devised to assess the quality of clustering for market-basket data. As validated by both real and synthetic datasets, it is shown by our experimental results, with the taxonomy information, algorithm k-todes devised in this paper significantly outperforms the prior works in both the execution efficiency and the clustering quality as measured by information gain, indicating the usefulness of category-based adherence in market-basket data clustering.     

基于微机的X射线分析自动测量系统

本文介绍了一个基于微机的X射线分析自动测量系统。该系统有三个基本功能:自动获取数据、自动换样和处理谱数据。     

Kinetics of methylamine conversion on a Pd catalyst in the presence of H2

The kinetics of disproportionation of methylamine to dimethylamine and ammonia in the presence of hydrogen have been investigated over a silica-supported palladium catalyst. At a fixed partial pressure of methylamine, the reaction rate generally increases with decreasing hydrogen partial pressure, approaching a limiting or maximum value at sufficiently low pressures of hydrogen. The existence of a maximum is supported by the observation that the presence of some hydrogen appears to be necessary for the reaction to proceed at a conveniently measurable rate. At a fixed hydrogen partial pressure, the reaction rate increases with increasing methylamine partial pressure. When the methylamine partial pressure is sufficiently low or the hydrogen partial pressure is sufficiently high, the reaction order with respect to methylamine can be somewhat higher than one. At such conditions, a mechanism involving a bimolecular reaction between two partially dehydrogenated methylamine molecules on the surface appears to make a significant contribution to the overall catalytic reaction.     

TiAl基合金粉末爆炸烧结特性常数的测算

本文测算了自蔓延高温合成TiAl基合金粉末的爆炸烧结特性常数值：γ＝1．44，lgβ＝25．25，并为试验证实，这为获取大尺寸TiAl基合金提供了理论依据。