Influence of zero-loss filtering on electron optical phase contrast

Complex scattering amplitudes are used to calculate the phase contrast of colloidal gold particles. Comparison of measurements of the phase contrast intensity at the centre of the gold particle as a function of defocus for unfiltered and zero-loss filtered images demonstrates the increase in phase contrast achieved by zero-loss filtering even for a thick carbon substrate film. The granulation of amorphous germanium films is measured by the spatial rms (root mean square) values of image intensity in a defocus series.     

提高润滑油基础油氧化安定性的组合工艺

以生产润滑油基础油的老三套工艺为基础，开发了改善油品氧化安定性的组合工艺。该工艺的主要特点是包括一步络合脱氮过程。实验证明，该组合工艺既可以有效地提高基础油的氧化安定性，又能降低溶剂精制深度，提高基础油收率。     

葛洲坝电站2号水轮机转轮室中环修复

针对葛洲坝电站2号机组运行中出现转轮室中环损坏的现象,设计制造出转轮室现场机加工的大型专用机床,在修复改造过程中,解决了一系列技术难题,改造后技术指标均达到理想水平,为电站机组现场修复技术积累了宝贵经验.     

TiO_2-聚乙烯复合膜的制备及红外光谱对其膜层结构的表征

开发了以Ｔｉ４＋为桥联剂制备无机－有机复合膜的新方法以自制的硅藻土多孔陶瓷为基膜（支撑体），使用浸涂法－热致相转化法相结合制备了ＴｉＯ２－聚乙烯复合膜，并用红外光谱表征了复合膜层与层之间的结合方式和强度，支撑体中的ＳｉＯ２通过Ｔｉ４＋与聚乙烯的分子之间形成了新的化合物型膜层     

Photostabilisation of colour formers for heat-sensitive recording systems: Effect of counter-ions on the photofading of fluoran dyes

Fluorans are given considerable attention as functional dyes for heat-and/or pressure-sensitive recording media. Numerous potential metal complexes were synthesised to prolong the life of coloured species. The protecting effect of these compounds against the photofading was examined on cellulose. It was found that the zinc or nickel salts of 3,5-dihydroxy-2-naphthoic acid and its derivatives can be applied as effective stabilisers against the fading of fluoran dyes.     

超临界流体络合萃取镧系和锕系元素的研究进展

超临界流体络合萃取是1种可用于萃取金属离子的新型分离技术，它应用于乏燃料后处理和核废物处理中的最大优点是能大幅减少二次废物的产生。文章主要介绍超临界流体的特点、超临界流体络合萃取的基本原理及其影响因素，并对超临界流体络合萃取镧系和锕系元素的研究进展及其在乏燃料后处理工艺研究中的应用进行综述。     

复杂构造叠后逆时深度偏移

本文从三维波动方程出发，导出了用于三维叠后逆时偏移的无层间反 波动方程，并给出了其数虎法和稳定性条件。     

硫磷化丙烯酸酯的合成及应用

以硫磷化合物和丙烯酸酯为原料，合成了硫磷化丙烯酸酯极压抗磨剂，该剂具有良好的热氧化安定性，水解安定性及抗乳化性能。用该剂复配抗氧剂，金属钝化剂，防锈剂及其它抗磨剂所调制的复合剂应用于32^#HM抗磨液压油中模拟数据全部达到标准要求指标。     

A review of the effects of water transfers in the La Grande Hydroelectric Complex (Québec,Canada)

Construction of the La Grande Complex in Eastern Canada called for complete or partial diversion of six rivers, the mean annual discharge of which varied from 60 to 1600 m³ s^?1, and the transfer of water from two adjoining watersheds (1586m³ s^?1) into La Grande Rivière. Three of these rivers with reduced flow, Eastmain (from 700 to 95m³ s^?1), Opinaca (from 260 to 35m³ s^?1), and Caniapiscau (from 1708 to 960m³ s^?1) and the waterways with increased flows, Boyd-Sakami (from 1 to 811m³ s^?1) and La Grande Rivière (from 1760 to 3400m³ s^?1) were intensively monitored from 1978 to 1988, while the others were surveyed sporadically. Very few modifications were observed, compared to previous conditions, in banks stability, water quality, and aquatic fauna of the affected rivers: those which appeared can be explained by the water level fluctuations, the water quality of the tributaries of the residual drainage basin, and/or by the direct influence of the reservoirs. In James Bay, the areal extent of the Eastmain River and La Grand Rivière plumes varied with discharge in an exponential relation, mostly under ice cover; resources from the coastal environment had not yet undergone any major changes. Because of the very small population dwelling in the area, less than 3000 inhabitants, modifications in the hydrological regime of these rivers did cause relatively few impacts, the main being greater banks instability in specific locations, reduction of the thickness and ice cover on La Grande Rivière, enhancement of navigation constraints on Eastmain River, and higher mercury levels in fish related to operation of the reservoirs.