蓖麻油基COPU／PMMA IPN的合成性能和形态结构的研究

研究了ＩＰＮ ＣＯＰＵ／ＰＭＭＡＢ预聚体合成的表观动力学。研究了ＩＰＮＣＯＰＵ／ＰＭＭＡ的物性及力学性，并用透射电镜研究了其形态结构。实验结果表明，此种ＩＰＮ材料具有良好的性能，如力学强度和化学稳定性。ＣＢ     

柴油机油金属元素含量分析与取样方法的研究

本文所述是柴油机油金属元素含量分析研究的一部分。其中阐述各种分析法、油样取样方法、取样部位、取样器具等的作用．另外还对取样状态和取样周期及操作因素对研究结果的影响。     

总量失衡与经济增长

本文建立了宏观经济系统模型，据此探讨了总量失衡对经济增长的影响。结果表明：适当的失衡有益于经济增长。     

锦纶—66帘子线耐热油剂的研究

根据锦纶—６６帘子线对油剂的要求进行了该油剂的配方设计，调整了平滑剂与乳化剂的比例，合成了理想的耐热油剂，用于原丝和帘子布生产，各项物理性能指标合格，效果良好．     

连续气举采油最大产量的优化计算法

根据节点系统分析原理和最优多相流相关式,讨论了利用计算机对连续气举采油时的最大产量进行优化运算的方法,得到了满意的结果。     

汽车油耗与节油

文章介绍了汽车节油的几种有效方法。     

城市住房需求分析

预测城市的住房需求具有重要的现实意义。制约住房需求的主要因素包括城市人口及其构成、家庭规模和类型、居民生活水平、住房政策等。本文在对多因素分析的基础上,提出了住房需求预测的方法和模型。     

Effects of Nutrient Source and Supply on Crude Oil Biodegradation in Continuous-Flow Beach Microcosms

Ammonium and nitrate were used as nitrogen sources to support microbial biodegradation of crude oil in continuous-flow beach microcosms to determine whether either nutrient was more effective in open systems, such as intertidal shorelines. No differences in the rate or extent of oil biodegradation were observed, regardless of whether these nutrients were provided continuously or intermittently. Nutrients were provided once every two weeks to intermittent-input microcosms and washed out within four to five days. In continuous-input microcosms, ammonium and nitrate were assimilated as quickly as they were provided during the first week, but both accumulated to greater than 10?mg?N/L thereafter. The sensitivity of the oil mineralization rate to nutrient input decreased rapidly as the extent of oil degradation increased, and after about two weeks the rate of oil-mineralization appeared to be independent of nutrient input. Therefore, there may be little value in maintaining a long-term supply of nutrients in contact with oil-contaminated sediments. The rates of microbial assimilation of ammonium and nitrate followed similar trends. Both compounds were assimilated more slowly as the extent of oil biodegradation increased, and the nitrate uptake rates approached zero after about two weeks. Ammonium assimilation continued at a low rate throughout the six-week experiment, but this did not appear to affect the rate of oil mineralization. Assimilation of ammonium resulted in a sharp decrease in the pH of the synthetic seawater that was pumped continuously through the microcosms, but nitrate had a much smaller effect on pH. The magnitude of the ammonium-associated pH change was never as large as was observed in previous studies involving oil biodegradation in batch reactors, however, and did not affect the oil-biodegradation rate.     

Comparative Absorption of Crude Oil from Fresh and Marine Water Using Recycled Rubber

Crude oil spillage is a major environmental pollution in the Niger–Delta area of Nigeria. The use of recycled rubber from enormous available scrap tires for pollution control of oil-polluted fresh and marine water and the attendant survival of aquatic organisms (fish) in these polluted waters was investigated. The absorption capacity of rubber particles for the oil was the same in both the oil-polluted fresh and marine waters and depended on the rubber particle size and temperature of absorption. The survival time of the fish depended on the amount of rubber added to and the dissolved oxygen (DO) concentration in the oil-polluted waters. The survival time increased from 3.5 to 7.25?h as the rubber to oil ratio was increased from 0.5 to 2.5. At a ratio of 3, the oil film on the water was no longer continuous and the survival time increased to 6,000?h. The survival time increased with the DO concentration in polluted water. In the absence of added rubber particles, the DO concentration decreased within 2?h from 5.27?mg/L to less than 3?mg/L, a value below the limit required for aquatic organism survival.     

住宅市场消费需求的决定因素与供给结构

分析了上海市住宅市场消费需求结构的内涵与构成,及其决定住房消费需求的主要因素,指出改变衡量住房供给结构合理度的标准.