碳化钽的加入方式对合金结构和性能的影响研究

对TaC加入到合金中的方式进行了研究，结果表明，以固溶体形式加入的合金的WC相和TiC－TaC－WC相较之以单质（TaC）形式加入的合金的WC相和TiC－TaC－WC相有较粗的亚晶结构和较小的微观应变。与此相对应的是，合金亦具有较好的物理力学性能和较长的切削寿命。     

SY300电解槽技术的开发与生产实践

本文通过对256台SY300(300kA)电解槽的设计和在河南豫港龙采铝业有限公司200kt/a电解系列的生产实践进行剖析，应用多模式智能控制技术和“四低一高”操作工艺。电解槽运行平糖、高效。三场设计合理．实际测试和设计值吻合。实践证明。SY300电解槽从设计到生产都已达到国际先进水平。     

GRINDING RESIDUAL STRESS OF CEMENTED CARBIDE

Grinding residual stress in the surface layer of WC-6 Wt—％Co hard alloy was measured by means of X-ray diffraction. The effects of various grinding parameters and treatment processes on the stress were studied. By means of electrolytic etching, the stress distribution along the depths beneath the surface was measured. The relationship between the stress and the service life of the alloy is discussed.     

SiO_2/Al_2O_3 RATIO OF HYDRATED SODIUM ALUMINOSILICATE IN ALUMINA PRODUCTION

ＳｉＯ２／Ａｌ２Ｏ３ＲＡＴＩＯＯＦＨＹＤＲＡＴＥＤＳＯＤＩＵＭＡＬＵＭＩＮＯＳＩＬＩＣＡＴＥＩＮＡＬＵＭＩＮＡＰＲＯＤＵＣＴＩＯＮ①ＤｅｎｇＨｏｎｇｍｅｉ，ＺｅｎｇＷｅｎｍｉｎｇ，ＣｈｅｎＮｉａｎｙｉＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｕ...     

50钢板裂纹分析

通过对50钢裂纹的宏微观分析，并结合轧制过程，认为该钢板产生裂纹的原因为此50钢连铸坯在拉钢过程中，产生内裂，低熔点物质向裂纹处填充，靠近表面处在轧制过程中形成了横向裂纹。     

A359-Zr(CO3)2体系反应合成复合材料的组织及润滑磨损性哪

研究了新型反应体系A359-Zr（CO3）2熔体反应法制备的（Al3Zr＋Al2O3）p／A359复合材料边界油润滑条件下的滑动磨损性能。结果表明，由于颗粒的支撑减磨作用，复合材料的磨损量随载荷的增大和时间的延长均远小于基体材料，当载荷为1176N时体积分数为12％的复合材料磨损量为4．9mg，而基体材料的磨损量为27．5mg，复合材料比基体材料耐磨性提高了6倍；由磨损表面SEN观察表明：基体A359合金存在严重粘着和变形，表现为粘着磨损和剥层磨损，复合材料的磨损类型表现为磨粒磨损。     

金刚石(膜)的拉曼光谱表征技术进展

本文较全面地介绍了金刚石(膜)拉曼光谱中各主要拉曼峰的位置、特点及光致发光现象,重点对1150 cm-1附近拉曼峰产生的原因进行了讨论.通过对前人数据、结论的分析,指出1150 cm-1附近的散射峰和紫外拉曼光谱中T峰出现的机理应是一致的,都源于有序尺寸的减少.根据共振尺寸选择效应,1150 cm-1附近的拉曼峰,可能是紫外拉曼光谱中的T峰在可见光谱中向高波数移动的结果;而不同方法制备的金刚石膜样品其晶粒尺寸差异造成的振动模禁止,是不同研究者对1150 cm-1附近拉曼峰作为纳米晶金刚石的特征峰争论的原因所在.     

集群式高性能计算系统研究

研究了集群的系统结构和主要优势,以及集群式高性能计算系统的诞生;分析了集群式高性能计算系统的架构和构建方式,集群构建包括网络部署、存储系统、计算节点、管理节点、登录节点等部分。在此基础上构建了基于Linux的集群式高性能计算系统。     

Top-<Emphasis Type="Italic">k</Emphasis> probabilistic prevalent co-location mining in spatially uncertain data sets

A co-location pattern is a set of spatial features whose instances frequently appear in a spatial neighborhood. This paper efficiently mines the top-k probabilistic prevalent co-locations over spatially uncertain data sets and makes the following contributions: 1) the concept of the top-k probabilistic prevalent co-locations based on a possible world model is defined; 2) a framework for discovering the top-k probabilistic prevalent co-locations is set up; 3) a matrix method is proposed to improve the computation of the prevalence probability of a top-k candidate, and two pruning rules of the matrix block are given to accelerate the search for exact solutions; 4) a polynomial matrix is developed to further speed up the top-k candidate refinement process; 5) an approximate algorithm with compensation factor is introduced so that relatively large quantity of data can be processed quickly. The efficiency of our proposed algorithms as well as the accuracy of the approximation algorithms is evaluated with an extensive set of experiments using both synthetic and real uncertain data sets.     

Segment-based adaptive hyper-Erlang model for long-tailed network traffic approximation

Modeling the long-tailedness property of network traffic with phase-type distributions is a powerful means to facilitate the consequent performance evaluation and queuing based analysis. This paper improves the recently proposed Fixed Hyper-Erlang model (FHE) by introducing an adaptive framework (Adaptive Hyper-Erlang model, AHE) to determine the crucially performance-sensitive model parameters. The adaptive model fits long-tailed traffic data set directly with a mixed Erlang distribution in a new divide-and-conquer manner. Compared with the well-known hyperexponential based models and the Fixed Hyper-Erlang model, the Adaptive Hyper-Erlang model is more flexible and practicable in addition to its accuracy in fitting the tail behavior.