Hydrolysis of Fe(OH)SO4 in the presence of metallic iron

Hydrolysis of Fe(OH)SO₄ was carried out in the presence of metallic iron in order to prevent the formation of iron(III) oxides with strongly bonded sulphate. Under the conditions of the experiment, the products were found to be mixtures of ?-Fe₂O₃ and α-FeOOH. The occluded sulphate, if any, could be easily washed out with water. The hydrolysis reaction passes through an equilibrium state before coming to completion. The entropy with enthalpy of the hydrolysis corresponding to the equilibrium state were found to be 4 e.u. and 0·5 kJ/mol, respectively. The activation energy of the hydrolysis reaction was found to be 21 kJ/mol.     

Corrosion behavior of NiCrMo Alloy 625 in high temperature, hydrogenated water

The corrosion behavior of NiCrMo Alloy 625 (UNS N06625) has been characterized in a 10,000 h test conducted in hydrogenated water at 260 °C. The corrosion kinetics were observed to be parabolic, the parabolic rate constant being determined by chemical descaling to be 0.074 mg dm⁻² h^−1/2. Characterizations of the corrosion oxide layer via grazing incidence X-ray diffraction and X-ray photoelectron spectroscopy in combination with argon ion milling and target factor analysis, revealed the presence of two spinel oxide phases and significant amounts of recrystallized nickel. Based on the distribution of three oxidized alloying constituents (Ni, Cr, Fe) with respect to depth and oxidation state, it was concluded that: (a) corrosion occurs in a non-selective manner, but significant amounts of nickel(II) ions are released to the water, and (b) the spinel oxides exist as a chromite-rich inner layer (Ni_0.7Fe_0.3)(Cr_0.8Fe_0.2)₂O₄ underneath a coarser, ferrite-rich outer layer (Ni_0.9Fe_0.1)(Cr_0.1Fe_0.9)₂O₄. The trivalent cation distribution in each of these phases appears to represent a solvus in the immiscible NiCr₂O₄-NiFe₂O₄ binary.     

导磁不锈钢毛的结构化研究

研制了一种新型的结构化钢毛——胶结钢毛。和传统的普通钢毛相比,胶结钢毛具有很强的结构刚度和很低的钢毛流失量;同时,对高岭土有较高的除铁效率。     

大功率速调管发射机水冷系统的设计

雷达发射机中大功率器件(如速调管)的强迫液体冷却是一种常用的冷却方式。本文根据某雷达发射机冷却系统的设计.介绍了大功率速调管发射机水冷系统的设计方法。     

Experiments of Fast Learning with High Order Boltzmann Machines

This work reports the results obtained with the application of High Order Boltzmann Machines without hidden units to construct classifiers for some problems that represent different learning paradigms. The Boltzmann Machine weight updating algorithm remains the same even when some of the units can take values in a discrete set or in a continuous interval. The absence of hidden units and the restriction to classification problems allows for the estimation of the connection statistics, without the computational cost involved in the application of simulated annealing. In this setting, the learning process can be sped up several orders of magnitude with no appreciable loss of quality of the results obtained.     

铝对W9Mo3Cr4V高速钢组织和硬度的影响

用Ｘ－射线仪，扫描电镜和透射电镜系统研究了铝对钨钼系高速钢铸态，退火以及淬回火组织的影响，铝含量超过２．０％，淬火组织中出现含析出合金的铁素体组织和晶界屈氏体，导致钢硬的降低。     

粘土作为高放废物处置回填材料的可行性研究

本文以西北粘土为对象,对其压实行为、热传导、膨胀特性,以及吸附和渗透性能进行了初步研究,借以探讨西北粘土在高放废物处置中用作回填材料的可行性。试验表明,以西北粘土为基材,经过适当的热改性和吸附改性,在初始含水量约为9%,于70MPa 下成型,用作高放废物处置中的回填材料是可行的。     

基于耗散结构理论和灰色关联熵的水资源系统演化方向判别模型研究

水资源系统是一耗散结构，本文以水资源量作为序参量，来描述水资源系统的有序性和演化方向。依据协同学理论，水资源系统要维持有序就要求经济、社会、生态子系统相互协调，系统序参量之间相互协同。应用耗散结构理论和灰色系统理论，把灰关联度与熵结合起来，以序参量为基础，建立了基于灰关联熵的水资源系统演化方向的判别模型，为水资源系统分析提供了新方法。并将该模型应用于黄河流域水资源系统的演化评价，为实施临界调控提供了依据。     

微合金化高强度钢轧制采用的工艺技术

本文综述微合金化高强度钢轧制采用的工艺技术，其中包括热装热送、板坯加热、控轧控冷、快速冷却、采用的新设备等工艺技术。重点是生产低碳、高韧性、高强度、易焊接的造船用钢采用形变热处理技术，以提高产量和质量，节省昂贵的Ｎｉ、Ｃｒ、Ｍｏ等合金，降低生产成本。     

高密度封装CAD技术研究

介绍了自行研制的高密度封装外壳设计软件、阐述了其工作原理和功能。应用该软件设计并制作出目前国内最多针脚数的外壳ＰＧＡ２５７。