In this thesis , by referring to the information of the state - of - art of the cement compression testing machine ( cctm ) both at home and abroad , a new means of direct digital control is introduced for the loading rate control of cctm 本论文在对试验机行业作了充分调研的基础上,通过阅读、分析及综合大量文献,进行了计算机控制技术应用于水泥压力试验机的研究。
The autor thought that for the main transformer , the load rate should be increased above 85 % ; and for the distributor transformers set with the electrial room , according to efficiency first principle , the load rate should be control at 40 % ~ 60 % 作者认为:主变压器设计选择时,应考虑提高其负荷率达85 %以上;电气室配电变压器选择时,应按效率优先原则为主,其负荷率控制在40 % ~ 60 %之间。
Early exploited oilfields mostly adopt the power supply mode of single well & single transformer & single asynchronous motor , which causes that the load rate of equipments in oilfield network is low , the power factor of oilfield network is lower and the energy loss of oilfield network is bigger 摘要早期开发的油田多采用“单井单变压器单异步电动机”供电模式,造成油田电网的设备负荷率和系统功率因数过低,电网耗能较大。
This project makes some researches with emphasis on the mv / lv distribution power supply situation under the present load condition . some results such as the calculation of line load rate , theoretical line consumption rate and electric voltage decrease are acquired by the mathematical analysis , and thus the power supply capability is evaluated comprehensively . the same has been done to the lv power network 课题在系统搜集分析苏州供电企业的背景资料,即企业概况、电力需求、输电网、高压配电网状况基础上,重点研究了当前负荷下的中低压配电网供电情况,并通过数学分析得出线路的负载率的计算、理论线损率以及电压降等各项运行指标,综合评估得出其供电能力。
The results show that in the later stage of the nucleation process , the maximum slip velocity is monotonically accelerating ; the slipping hot spot ( where the slip rate is maximum ) migrates spontaneously from a certain instant , and such migration is spatially continuous ; when the maximum velocity reaches a detectable order of magnitude ( at least one order of magnitude greater than the loading rate ) , the remaining time is 20 hours or more , and the temporal variation of slip velocity beyond this point may be used as a precursory indicator ; the average slip velocity is related to the remaining time by a log - log linear relation , which means that a similar relation between rate of microseismicity and remaining time may also exist ; when normal stress variation is taken into account , time scale of such processes can be extended by about 2 times 结果表明,在成核的后期阶段:最大位移速率单调加速增加;滑动热点(最大滑动速率处)在后期阶段开始自发性迁移,且在空间上连续;当最大滑动速率达到可以明显探测的量级时(高于载入速率一个数量级以上) ,倒计时间为20小时或更长一些,这时的速率变化可作为临震预测标志;平均滑动速率与倒计时间的关系在临震阶段呈对数线性趋势,由此可推测微震活动增长率与倒计时间同样存在对数线性关系;正应力的变化对上述时间尺度有延长作用,使之大致增加到原数值的2倍。