Constant current and constant voltage methods can be used to measure the speaker impedance curve respectively with these two types of amplifiers 这2种类型的功放能够分别实现对扬声器阻抗曲线使用恒流法和恒压法进行测量。
Applied constant keeper can enable the microorganism to continuously culture in double periods of “ constant flowing method speed ” . ? it has a process as such : according to the multiplying speed that the bacteria cultures in double growing periods , and the speed that it consumes the nutritious material , fresh culturing liquid is continuously added . ? at the same time , the same amount of well - cultured bacteria liquid is continuously drawn out , so that the next two items are kept relatively constant : the added material and the consuming material ; the amount that the bacteria have multiplied and that has been drawn out 应用恒化器,能使微生物以对数期“恒流法速度”连续培养,即根据菌种在对数生长期繁殖的速度和消耗营养物质的速度,不断加入新鲜培养液,同时不断抽出等量培养好的菌液,使加入物与消耗物、细胞繁殖量与细胞物质抽出量,保持相对稳定均恒。