The development status and trend of gasoline engine oil at home and abroad are described in this paper . the tribology and lubrication characteristic and lubrication mechanism of the main tribo - pairs of gasoline engine are analyzed simply . in this paper base oil and some additives are chosen reasonably according to the lubricantions principal and a lot of data . the uniform design of experiment is used to arrange multi - level and multi - factor experiments . the stepwise technique is adopted to analyze the result . the sensitivity and compatibility among additives and the base oil are studied by a series of tests . on the basis of analyzing the low temperature capability the optimum of 15w / 40 sh gasoline engine oil is presented . at last , the property of this formulation is evaluated by comparing with the imports . the test result shows that their qualities are equivalent 本文介绍了国内外汽油机油的发展现状以及发展趋势，通过分析汽油机主要摩擦副的摩擦磨损特性和润滑状态以及汽油机对润滑油的性能要求，在润滑理论的指导下和参阅大量资料的基础上，合理地选择基础油和添加剂。本文用均匀实验设计安排实验，用逐步回归技术进行结果处理，分析了基础油对添加剂的感受性和添加剂之间的配伍性。在重点考察汽油机油低温性能的基础上，提出了15w 40sh级汽油机油的优化配方。
By analyzing the biodegradable engine oil ' s demands on the lubrication mechanism and biodegradable performance , base oil and some additives are chosen scientifically and reasonably . the uniform design of experiment is used for arranging multi - level and multi - factor experiments . the stepwise technique is adopted to put forward the regression equation 通过分析可生物降解润滑油在润滑性能和生物降解性能两方面的要求，合理的选用基础油和添加剂，并引进均匀设计方法，合理的安排多水平多因素试验，用逐步回归对试验结果进行处理，得出回归方程，以此分析基础油对添加剂的感受性、添加剂间的配伍性。
This review and our recent studies suggest that : ( 1 ) baroreceptor reflex is blunted in heart failure ; ( 2 ) central angiotensin ii and reactive oxygen species play an important role in blunted baroreceptor reflex ; ( 3 ) cardiac sympathetic afferent stimulation and chemoreceptor reflex inhibit baroreceptor reflex ; and ( 4 ) exercise training normalizes abnormal reflexes in the heart failure state 本综述及我们近年的研究表明： ( 1 )在心力衰状态下压力感受性反射功能明显减弱( 2 )中枢血管紧张素和活性氧在压力感受性反射功能失调中发挥关键作用； ( 3 )心交感传入刺激和化学感受性反射能抑制压力感受性反射； ( 4 )适当的运动可以部分纠正异常的心血管反射活动。
