面向目标控制照明的合成波源偏移

应用Fourier有限差分算子，研究目标控制照明的合成波源偏移成像。平面波源与小束波源这些合成波源在目标控制照明下的偏移，都是通过增强对目标区域的有效照明来改善成像质量，通过减少非目标区域的计算冗余来提高计算效率。由分析和应用合成平面波源偏移和控制照明技术扩展开去，综合考虑平面波源和小束波源的合成与偏移，并通过有效照射合成波源的概念，分析合成波源的有利照明，进行面向目标区域的控制照明和合成波源偏移。最后，对具有速度强横向变化和陡倾角反射的复杂2D盐丘模型数据，做了相应的合成波源偏移数值试验。     

Substitution of sodium chloride by Morton Lite Salt or Mineral Salt in mayonnaise

The effect of substituting Morton Lite Salt or Mineral Salt for sodium chloride in neutral emulsion and in mayonnaise was evaluated by using 1.00% sodium chloride, 1.25% Morton Lite Salt and 1.40% Mineral Salt of the emulsion weight. None, 1.00%, 2.00% and 3.00% of lactose were used to mask the bitter taste associated with potassium chloride. A triangle test using twelve to fifteen panelists was used. Results indicated that both Morton Lite Salt and Mineral Salt had a significant different taste (P ≤ 0.01) as compared with sodium chloride when they were used with none and 1.00% of lactose. Samples which had 2.00% or 3.00% lactose showed no significant taste difference between Morton Lite Salt or Mineral Salt and sodium chloride. It was concluded that a bitter masking agent such as lactose is needed when Morton Lite Salt or Mineral Salt is used to substitute sodium chloride in mayonnaise.     

药物中抗坏血酸的铁铵矾氧化还原滴定法

研究了用磺基水杨酸作指示剂，用铁铵矾标准溶液氧化还原滴定抗坏血酸的新方法，用于药物中抗坏血酸的测定，结果与碘量测定法，紫外光度法所得结果基本一致。     

丙烯酰胺与2-甲基丙烯酰氧乙基三甲基氯化铵在柠檬酸钾溶液中的沉淀聚合

以(NH4)2S2O8-Na2SO3为氧化还原引发剂,通过非离子单体丙烯酰胺(AM)与阳离子单体2-甲基丙烯酰氧乙基三甲基氯化铵(DMC)在柠檬酸钾溶液中的沉淀聚合,制备了阳离子聚电解质聚(2-甲基丙烯酰氧乙基三甲基氯化铵-丙烯酰胺)[P(DMC-AM)]。利用溶解度参数原理,得知聚合物[P(DMC-AM)]在柠檬酸钾溶液中的溶解量远小于单体的溶解量,同时探讨了聚合物[P(DMC-AM)]在柠檬酸钾溶液中沉淀分离的机理。通过考察单体总转化率的影响因素,得到最佳的反应条件:柠檬酸钾质量分数57%,m((NH4)2S2O8)∶m(Na2SO3)=1∶1,引发剂总质量分数0.10%,单体总质量分数3%,单体配比m(DMC)∶m(AM)=3∶1,反应温度50℃,反应时间2h。在此条件下,DMC和AM的总转化率为86.4%。通过红外光谱分析验证,所得聚合物为[P(DMC-AM)]。     

清代盐商与官僚资本述略

清代官僚资本是盐商发迹的主要资本来源之一.清初,盐商依靠官僚资本的扶持得以迅速发展,并于乾隆中叶达到顶峰.但乾隆后期以来,随着官僚资本的日益高利贷化,盐商因受累于官僚资本的剥削和压榨而逐渐走向衰败,嘉道以后,终于发展到纷纷倒闭的局面.事实表明,清代盐商的兴衰与官僚资本之间有着息息相关的联系.     

Effect of corrosion on mass loss, and high and low cycle fatigue of reinforcing steel

The effect of various levels of corrosion on the mass loss, and the high and low cycle fatigue of BSt500_s steel reinforcement were experimentally investigated. The mass loss, the fatigue limit, and the life expectancy were reduced by 1.5 to 2.9%, 20 to 40%, and 56 to 76%, respectively, according to the corrosion level. Low cycle strain-controlled fatigue testing under a ±1% constant amplitude strain showed that the corroded steel bars exhibit a gradual reduction in the load-bearing ability, the available energy, and the number of cycles to failure. The considerable reduction in the fatigue limit took place because the mass loss led to a reduction of the exterior hard layer of martensite and a drastic drop in the energy density of the corroded specimens, thus developing stress concentration points that are highly localized at imperfections, and especially in the pits and notches of the rib bases of the corroded steel. Because corrosion and cycle fatigue are time-dependent, it seems that steel reliability is also time-dependent.     

特殊结构吉米奇(Gemini)季铵盐性能及其在油田中的应用

对几种特殊结构吉米奇(Gem in i)季铵盐的性能进行研究,其中包括含有聚氧乙烯基、超支化、不对称吉米奇季铵盐,并对其在油田三采驱油、油田防膨、油田杀菌方面的应用进行了综述。     

蒸馏塔顶系统缓蚀剂的研制

针对辽河原油的特点 ,锦西石化公司研究院与中科院金属所合作 ,以合成的咪唑啉衍生物和炔氧甲基季铵盐为主要组分 ,复配成功抑制HCI -H2 S -H2 O体系腐蚀的水溶性缓蚀剂IMC - 97-C。经实验室评价和现场中试评价试验证明 :IMC - 97-C缓蚀性能优良 ,可以有效地抑制蒸馏塔顶低温冷凝冷却系统的腐蚀。当pH值控制在 6.0～ 8.0时 ,塔顶露点区的腐蚀率仅为 0 .0 6mm/a ,远低于注氨时的 0 .3 2mm/a的腐蚀速率 ,而且对汽油质量无不良影响     

吐哈油田盐膏层钻井液技术

吐哈油田西部各区块富含盐膏、膏质泥岩层 ,钻井时易发生复杂情况与事故。通过几年来钻井液技术的研究与实践 ,优选应用了聚合物抗盐钻井液 ,配合钻井工程技术措施 ,解决了盐膏层钻井技术难题 ,钻井质量逐年提高。     

膨化硝铵炸药轮碾混合工艺探讨

本文针对现行膨化硝铵炸药轮碾混合工艺，对影响膨化硝铵炸药爆炸性能及贮存性能的因素进行了试验及探讨，试验结果对改进工艺、提高产品爆炸性能有一定参考价值。