哈尔滨炼油厂MTBE装置试生产

介绍了哈尔滨炼油厂ＭＴＢＥ装置的工艺路线、新技术的应用及特点；催化剂的装填及应用情况；总结了生产过程中遇到的一系列问题及解决办法；探索了平稳生产的新徐径，以保证装置安全、平稳、长周期运行；同时对反应器操作温度、催化蒸馏塔操作压力、原料中醇烯比等因素对异丁烯转化率及ＭＴＢＥ产品的影响做了简单的总结。     

Measurements of Stress Intensity Factors of an Interface Crack Under Mixed Mode Loading

The optical method of caustics has been utilised to measure both the stress intensity factor for a crack lying along the interface of an aluminium/epoxy bimaterial specimen, and the mode mixity arising from the difference in the elastic properties across the interface. Measurements were carried out by using a novel modification to the method whereby caustics are produced and measured from both sides of the specimen, so compensating automatically for the distortion induced in the specimen due to misaligned loading fixtures. A flat reflective surface across the interface was obtained by adhering a reflective coating to the specimen. Verification that this coating does not affect measurement accuracy was obtained by comparing stress intensity factors measured from coated and uncoated monolithic aluminium specimens where good agreement was found to exist between both measurements.     

Iterative finite element model of nonlinear viscoplastic analyses for blended granular porous media

The iterative finite element model, in which an element is used to represent a single particle, is generated to analyze the global behavior of multiple-material aggregates of materially nonlinear viscoplastic particles. The generalized Maxwell model is used to define four types of specific nonlinear viscoplastic materials, which are the elasto visco-plastic matter with linear viscosity, the plasto visco-plastic material with linear viscosity, the elasto visco-plastic media with nonlinear viscosity, and the plasto visco-plastic media with nonlinear viscosity. The theory and relevant penalty iterative algorithm are developed to analyze the four representative mixed granular systems consisting of materially nonlinear viscous particles. To verify precision of stress calculation, solutions of an axis-symmetric radial flow problem are compared with results of the literature and they are in a great agreement. The results present here provide significant insight into the fundamental behavior of granular media under compaction conditions, including prediction of the overall aggregates stress-strain response.     

硫化锌纳米粒子的微乳液合成

介绍了微乳液制备纳米粒子的基本原理。对影响微乳液体系形成的主要因素如油相、水相、表面活性剂种类及用量等进行了研究，以表面活性剂TWEEN80和SPAN80作乳化剂，通过调整其比例控制乳化剂的HLB值，制备了乳化剂浓度为0.3mol/L、水/乳化剂比为6：1的W/O型庚烷/ST80/水微乳液体系。在此微乳液中制备了ZnS纳米粒子，采用TEM和XRD对超细样品的结构进行表征，表明得到的样品为β型立方晶系ZnS粒子、粒子粒径10-30nm。     

n-Al2O3P/Ni复合刷镀层的组织和摩擦磨损特性

研究了镍基纳米Al2O3复合电刷镀层（n-Al2O3^p/Ni）的组织特征及擦磨损特性，并与快镍刷镀（Ni)进行了比较。结果表明：n-Al2O3^p/Ni复合刷镀层表面粗糙度更小，组织更致密，镀层摩擦系数随镀液中纳米粒子含量增加稍有增大；n-Al2O3在复合刷镀层中弥散分布，与基相良好结合；复合镀的耐磨性能明显优于Ni刷镀层，镀液中n-Al2O3含量为20g/L时，复合刷镀层具有最佳耐磨性能。     

Influence of geosynthetic reinforcement on the load-settlement characteristics of two-layer subgrade

The possibility of realistic prediction of two-layer subgrade load-settlement characteristics is discussed. The case of improvement of the soft subgrade properties using the geosynthetic reinforcement placed at the boundary between two different subgrade layers is analysed. In the first part of the paper, a short review of the main conclusions from experimental results dealing with the influence of geosynthetic reinforcement on the load-settlement characteristics of subgrade is presented. Then, the results of using the selected analytical membrane-action model to describe the reinforcement action in soil are discussed. The model is verified on the basis of data obtained from previously published laboratory tests. Particular attention is devoted to influencing some basic initial parameters on the accuracy of obtained results. Important problems which need intensive investigations are identified.     

复杂条件下发挥锚杆支护作用的相关技术

介绍了在特殊地质和开采条件下,发挥锚杆支护作用的几种相关技术。     

Dielectric Resonators for the Measurement of Superconductor Thin Films Surface Impedance in Magnetic Fields at High Microwave Frequencies

We present the design and realization of cylindrical dielectric resonators operating in the 40–60 GHz frequency range, designed for the measurement of the surface resistance and of the surface reactance shift in High-T _c Superconductors (HTS) thin films in a dc magnetic field. The resonators are single tone, based on the TE ₀₁₁ mode, and multiple tone, the latter allowing in principle to exploit the simultaneous determination of the surface impedance at different frequencies. As an application example, we report the temperature and field dependencies of the effective surface impedance of some cuprate superconductors thin films. The results are compared with those obtained through the use of a standard metal cavity with a similar Q-factor and operating in the same frequency range. The comparison highlights a superior stability and a higher sensitivity, resulting in an increase of about two orders of magnitude in the resolution of the surface impedance measurement. By contrast, the dissipative part of the superconducting transition (above T/T _c = 0.97) is better studied with the metal cavity. We also present measurements in the vortex state in YBaCa₂Cu₃O_7−δ and Tl₂Ba₂CaCu₂O_8+x that show significantly different physics. PACS: 74.25 Nf.     

催化裂化原位降硫助剂的制备及其性能研究

采用溶胶-凝胶法制备具有介孔结构的降硫基质材料，选择具有降硫选择性的活性元素对合成的基质材料进行改性处理，考察不同的改性方法对制得的催化裂化原位降硫助剂性能的影响，并对基质材料和降硫助剂的结构进行表征。采用美国进口的ACE-R小型催化裂化评价装置将降硫助剂与催化裂化催化剂匹配进行性能评价，在不改变原催化裂化产品分布和产品性质的同时，降低原料的总硫含量，总硫降低可达40％以上。