USL和USK系列振动筛防噪技术分析

为了改善筛分机械的使用环境，降低筛分机械的噪声，从噪声源入手，从内因和外因两个方面分析了筛分机噪声的形成原因。论述了USL和USK系列振动筛在降低噪声方面所采取的先进技术措施。     

T梁预制中需要注意的问题

为确保在T梁预制时 ,其内、外的质量和安全施工 ,介绍了四个需特别注意的问题。指出在T梁预制时 ,应把质量放在首位 ,进行具体、综合的分析和计算     

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对三种天然气压缩因子计算方法：经典热力学法、SGERG-88法、SY／T6143—1996法进行了介绍并对计算结果进行了对比，第一种方法的计算精度远不能满足贸易结算的要求，我国现行的第二种计算方法与ISO标准方法相比，在10℃以上的温度范围内基本相符，但在10℃以下的低温段则偏差较大。由此说明，我国目前所实施的计量标准与国际上认可的ISO标准方法之间有较大的偏差；同时，对不需要在线计算的场合，提出了一套基于数据拟合的计算体积修正系数的高精度近似方法，可提高体积计量仪表的性价比。     

井底堆积物的作用

分析了深井低品位岩溶采卤中，井底堆积物的形成和发展，利用流体力学理论，从正反两方面分析了井底堆积物在采卤中的主要作用。     

Research on the Distant Hybrids of Wheat Obtained via Low-Energy Ion-Beam Implantation

Abstract The whole DNA of soybean was implanted into four varieties of wheat of Zhongyu5, Huaiyin 9628, Wenyou 1, Jimai 5 respectively via ion-beam mediation. There were 5 plantsobtained whose protein content was higher than 18.5%, the highest one was 21.44%. There were 3plants obtained whose protein content was lower than 11.5%, the lowest one was 10.96%. We cansee that the whole DNA of soybean transformed into wheat via ion beam implantation can inducethe increase in wheat protein content dramatically. The result also shows that the transformationefficiency of different gene types of wheat receptor varies greatly that the implanting time has acertain effect on the efficiency of transformation.     

尾气石蜡吸收工艺的改进

浸出车间尾气石蜡吸收系统吸收效果的好坏是影响溶剂消耗的主要原因，通过对改进前后两种尾气石蜡吸收工艺的对比、分析，并根据在油厂中的实际使用，证明改进后的工艺能显著降低浸出车间的溶剂消耗，值得在油厂推广应用。     

Generalized null space uncorrelated Fisher discriminant analysis for linear dimensionality reduction

We propose a generalized null space uncorrelated Fisher discriminant analysis (GNUFDA) technique integrating the uncorrelated discriminant analysis and weighted pairwise Fisher criterion. The GNUFDA can effectively deal with the small sample-size problem and perform satisfactorily when the dimensionality of the null space decreases with increase in the number of training samples per class and/or classes, C. The proposed GNUFDA can extract at most C-1 optimal uncorrelated discriminative vectors without being influenced by the null-space dimensionality.     

Spatially resolved infrared spectroscopy: a novel technique for in situ study of spatial surface coverage during CO oxidation on supported catalysts

A spatially resolved infrared (IR) imaging technique to monitor the linear adsorbed CO coverage on supported catalyst surface combining an IR bandpass filter and an IR thermography camera has been developed. Images acquired during the CO adsorption/desorption and ignition indicate that the technique provides an excellent method to image the change of surface coverage with a spatial resolution. It is expected that the combination of infrared thermography with spatially resolved imaging of surface coverage will provide a deeper insight in the dynamics of spatio-temporal patterns on heterogeneous catalysts.     

铸造高性能合金的显微组织及耐腐蚀行为

对铸造高性能合金Lewmet55进行了化学成分设计，确定了该合金中镍、铬、钼、铜和硅的含量。采用金相显微镜和X射线衍射相结合的方法，分析了该合金的显微组织，并采用多种腐蚀试验方法研究其耐腐蚀行为。着重研究了不同热处理制度对铸造高性能合金的均匀腐蚀、晶问腐蚀、点蚀和电化学腐蚀性能的影响。试验结果表明，Lewment55合金经1250℃×1．5h水冷固溶处理后，在高温浓硫酸介质中具有良好的耐蚀性，以及较好的抗晶间腐蚀、点蚀和电化学腐蚀性能。