Concepts and realization of a high-performance data type architecture

Fifth generation computers are expected to capitalize on the dramatic progress of VLSI technology, in order to offer an improved performance/cost figure. An even more important requirement, however, is that they will support by architectural means the generation, execution, and maintenance of quality software, as a way out of the software crisis. One approach towards the design and implementation of quality software is programming with abstract data types, in connection with elaborate type consistency checking. The objection raised against the abstract data type based programming style is poor run time efficiency when such programs are executed on a conventional machine. In this paper adata type architecture is described that offers efficient and convenient mechanism for constructing arbitrary data structures and encapsulating them into abstract data types, thus avoiding the inefficiency penalty mentioned above. Through a process of hierarchical decomposition, user-defined abstract data types are mapped on representations given in terms of a basicstructured machine data type. This approach combines high performance with generality and completeness. The hardware structure of the data type architecture can be classified as a strongly coupled, asymmetric multicomputer system with hierarchical function distribution among the computers. The system includes a pipeline for numerical and nonnumerical operations, performed on the vector-structured basic machine data type in the SIMD mode of operation. Software reliability and data security is enhanced through elaborate run time consistency checking. The computer, which was designed and built at the Technical University of Berlin, has recently become operational. This paper outlines the operational principle, the mechanisms, and the hardware and software structure of this innovative, fifth generation computer architecture.This work was sponsored by the German Science Foundation under grant no. Gi 42/13.     

可转债融资与公司股价长期表现实证研究

实证检验了我国上市公司可转债融资后的股价长期表现,结果发现,可转债融资后的公司股价并未如配股和增发再融资后的长期表现欠佳,而是有一定的优越表现.以EBIT与Size/BM可比公司进行调整后,一年期的累积超过收益分别为13.52%和17.13%,而以大盘指数调整后的一年期累积超额收益仅为0.41%.对以Size/BM可比公司调整后的累积超额收益给予的多元回归分析发现,可转债发行后的一年期股价市场表现与初始转换概率正相关,与股权稀释因子负相关,而在统计意义上不显著,但制造业公司在可转债发行后股价的一年期市场表现优于非制造业的公司,且在10%的水平下显著.     

永平铜矿选矿厂减少硫精矿浓密池硫流失生产实践

针对近两年永平铜矿矿石性质发生变化后，造成硫精矿浓密池跑浑严重的问题所采取的一些技术措施和管理措施，在减少硫精矿浓密池硫流失方面取得了较好的成效，对同类型矿山有一定的借鉴作用。     

四通道旋风煤粉燃烧器的开发试制

四通道旋风煤粉燃烧器是由法国PILLARD公司引进的，用于水泥企业的回转窑中的消耗备件，国内很多科研单位开展了这方面的研制工作，取得一定的成效。本文就本公司在这方面所做的一些探索总结出来，供相关人员参考。     

Two Modified Semicircle Control Charts for Detecting Process Improvement

A semicircle control chart can be used in detecting both increases and decreases in the mean and/or variance. In this paper, we propose two modified semicircle charts for detecting a reduction in the process variance, a.k.a. process improvement. Each of these modified semicircle charts, namely, SC1 and SC2 has two limits, defined by the inner and outer semicircles. A process improvement is detected by the SC1 scheme if a point is plotted inside the smallest semicircle, or if two successive points are plotted between the inner and outer semicircles and by the SC2 scheme if a point plots inside the smallest semicircle or if two of three successive points plot between the inner and outer semicircles. It will be shown that the two modified semicircle charts have superior average run length (ARL) performances to the basic semicircle chart in the detection of process improvement. The ARL study is conducted by means of a simulation.     

特殊运行方式与保护装置的配合

本文主要讨论了如何根据现场实际接线及设备工况临时改变运行方式 ,并在非正常运行方式下如何变更保护动作时限以及自动装置的投入方式。     

基于二值图像的指纹细节点提取

指纹细节点提取是自动指纹识别研究的关键问题之一，尽管已有很多基于细化图像分析的方法和基于原始灰度图像分析的方法，但该问题还没有得到很好的解决。因此提出了一种从二值图像上提取细节点的方法。首先通过行程匹配得到二值指纹图像中的图段，然后根据图段的结构形式和图段之间的连接关系进行细节点的判定，细节点的方向通过直线试探法获得。实验结果表明：与基于细化图像的方法相比不仅具有较高的效率，而且能使指纹匹配达到较高的精度。     

基于图理论聚类和二值纹理分析技术的彩色文本图像二值化方法

为了有效地对彩色文本图像进行分割，提出了一种复杂背景下彩色图像中文本一背景分离的新方法。该方法首先应用颜色空间降维以及基于图理论的颜色聚类对彩色文本图像进行聚类，并对应于聚类结果获得一系列二值图像，这些二值图像以及它们之间的组合就构成了二值化的待选结果；然后对与游程直方图以及空间-尺寸分布相关的两类纹理特征进行分析，并结合线性判别分析分类器来从待选的二值图像中选取出具有最佳文本背景分离效果的二值图像。实验结果显示，该方法的：二值化效果比现有方法有显著提高，因而能更有效地对具有复杂背景的彩色文本图像进行分割。     

高炉煤气余压发电装置在鞍钢的应用

鞍钢第一台高炉煤气余压发电机组于1993年定货后机组一直闲置，2001年公司开始安装调试，由于该机组闲置时间长，在调试、生产初期出现了一些设备故障，针对这些故障作了分析、处理。     

数控车床加工效率的优选研究

以齿轮零件为例,介绍了数控车床加工时对怎样合理安排加工顺序,走刀路线、刀具的选择及切削要素的确定进行了分析,对在数控车床上加工类似零件有一定的参考价值。