论《爱孩子的人》的形象体系

本文围绕三个方面对该长篇小说的复杂性作一探讨，即：１．主人公形象所包含的个性结构的复杂性；２．形象塑造方法的复杂性；３．形象所表现的主题的复杂性。从心理学、社会学、哲学三个层面切人，阐发了小说所特有的丰富的内涵。     

生物学教学中“动态平衡”的知识迁移

教育的核心是"迁移"。生物学教学中,教师不仅要培养学生本学科内的知识迁移能力,还要促进其它学科知识在生物学习中的迁移和扩展。而其它学科知识在生物学中的应用,对解决生物学教学中的某些难点,可起到画龙点睛的作用,达到事半功倍的效果。本文拟从运用化学"动态平衡"的知识迁移,解决生物学教学中"植物根细胞吸收无机盐的机理"的难点问题进行探讨。     

用焓动态平衡法实现空气参数的多变量控制

本文介绍一种基于动态平衡思想实现的对空气温、湿度两个变量进行高精度控制的系统设计方法，该方法克服了空气参数的滞后问题，并且采用微机对两个变量间的耦合关系进行予估补偿，而不必为实现解耦去测试对象的数学模型．辅以微机实现的Ｂ－Ｂ控制及变速积分ＰＩＤ控制，从而以较低的成本获得了比较满意的温、湿度控制效果．     

Study on the application of active balancing device to solve the vibration problem for the rotor with bending fault

The rotor with bending faults that occurrs on the rotating machinery usually vibrates seriously. This paper investigates to apply the active balancing device on a flexible rotor with bending faults to solve the vibration problem. Two problems are studied by finite element method firstly： Where the balance actuator is fixed on the shaft and how much the balancing capacity of the active balancing device is needed. The experiment is then carried out on the test rig, which consists of a flexible rotor with bending faults. The test results indicate that the bending rotor peak vibration response can be decreased from 550~m to 40~tm below by using the active balancing device. The peak vibration response decreases approximately by 93 %. The synchronous vibration due to the rotor bending faults can be controlled effectively by using ac- tive balancing device. The active balancing device is especially adapted to solve the problem caused by thermal distortion with time-variation and randomness, which is varied with working conditions, thus it has good practical value in practice.     

Dynamic balancing of dual-rotor system with very little rotating speed difference

Unbalanced vibration in dual-rotor rotating machinery was studied with numerical simulations and experiments. A new method is proposed to separate vibration signals of inner and outer rotors for a system with very little difference in rotating speeds. Magnitudes and phase values of unbalance defects can be obtained directly by sampling the vibration signal synchronized with reference signal. The balancing process is completed by the reciprocity influence coefficients of inner and outer rotors method. Results showed the advantage of such method for a dual-rotor system as compared with conventional balancing.     

我国土地整理中的生态学问题与对策探讨

文章介绍了土地整理的由来与发展,土地整理在我国土地资源可持续利用中的地位和作用,指出了当前土地整理中的一些不利于土地可持续利用的生态学方面的问题,提出了解决这些问题的生态学对策。     

尚福林:金融创新必须植根于实体经济

<正>中国银监会主席尚福林日前撰文指出,银行业要建立有效的约束机制。没有约束的扩张不是有效扩张,没有约束的发展不是科学发展。当前最重要的是强化资本约束,实现资本占补的动态平衡。尚福林指出,近年来,商业银行引入了激励机制,但也出现了激励不     

AVL树的动态平衡算法

从插入和删除２个方面分析了ＡＶＬ树的动态平衡性，提出了一种有效的统一处理ＡＶＬ树的动态平衡的算法。     

物体受力的动态分析问题

总结高中物理动态平衡问题的图解法处理问题。