Dense of structure and development of final properties were benefited from retardation of hydration . in contrast , cement hydration process was controlled better by polycarboxylate superplasticizer than the other three superplasticizers owing to its stereoscopic action . and its adaptability to cement was better , by which the cement particles were 相比之下,聚羧酸盐高效减水剂由于其良好的空间位阻效应,能够使水泥颗粒呈完全分散状态,与其他三种高效减水剂相比可有效控制水泥水化历程,与水泥适应性较好。
The rule of loads and settlement is concluded from numbers of settlement observation points ’ data . and in actual construction , this rule could be used to prevent immediate settlement under the accelerated load , and also , the serious result of the soil destruction could be avoided . at last , a proper method of settlement computing is derived from the identified rules , which can be used to guide the practical construction work , of course , meeting the compulsory standards of the settlement control well 采用逆作法施工,现实地解决了桩、土与筏板接触面的变形协调关系;通过对桩、土受荷过程的实际测试,得出了桩、土分担荷载比例和变化过程,从而为桩、土的荷载计算提供实际依据;从设置的大量沉降观测点中所得到的沉降资料,得出荷载、沉降变化规律,从而指导在实际施工中,防止加载过快而导致速沉,避免由此带来的土体破坏的严重后果;通过沉降规律分析,得出了适用于软土地区的桩基沉降计算方法,用于指导实际施工,以满足沉降控制的强制性标准。
Using sige bicmos darlington configuration as the input stage , the input resistance is increased by the mos devices while the transconductance of sige hbts is maintained . in the same time , the equivalent input noise is controlled well because of the sige hbts ’ good noise performance in the input stage 输入级的设计采用sigebicmos达林顿结构,在保留sigehbt高跨导优势的基础上充分利用mos器件来提升运放输入电阻,此外,基于输入级中sigehbt良好的噪声特性,运放的输入参考噪声电压可以大大降低。
It is impossible to simulate the imaginary instinct deduction control completely with computer . " increment - decrement and half computing " intelligence control method is pointed out for the single input and single output control system , which is representative of the imaginary instinct deduction control well 若以现有的计算机技术完全模拟人的形象直觉推理控制是不可能的,针对单输入单输出这一类简单的控制系统,提出了“增减对分”智能控制法,较好地模拟了人的形象直觉推理控制。
In order to realize automatic and intelligent control better ; and to enhance the effect of electric power system ' s reactive power compensation and the economy of power network ; and to minimizing the times of checking in or out capacitor banks makes reactive power adjustment optimum , fuzzy control technology and genetic algorithm for reactive power optimization are proposed . we also mention how to make voltage and reactive power control optimum in the integrated automatization system of substation 为了充分实现控制的自动化与智能化,进一步提高系统无功补偿的效果和电网运行的经济性,保证无功调节达到最佳的状态而投切的电容器次数最少,还引入了模糊控制技术和遗传算法进行无功优化,探讨了如何在变电站综合自动化系统中实现电压无功的最优控制。