1 due to adjustment of the image quality depending on conditions of the machine or under network environments , warm - up time may exceed 2 minutes 30 seconds 1由于画面质量调整依赖于机器的状态或者网络环境，预热时间可能会超过2分30秒
In addition , four colours of density control patterns are written at high speed and then read together , enabling a short warm - up time from poweron or sleep mode of less than 30 seconds 此外，四色的密度控制模式以高速写入然后再一起读取，从而将从开机或睡眠模式开始的预热时间缩短至30秒以下。
A normal co - axis he - ne laser tube with bore length l = 190 mm was used . with pid and self - organised fuzzy control , the frequency error could be confined to a 10 ~ 9 level . in addition , preheating time and anti - interference were within requirements 选用腔长l = 190mm的普通同轴式he一e激光管，采用pid和自组织模糊控制模式可达到10一的稳频精度效果，并满足预热时间和抗干扰要求。
In conclusion , this device cuts engine warm - up time , increases thermal efficiency , boosts up adaptability of engine cooling system in different working status and has the characteristic of delicacy and precise compared with the traditional mechanism pump 总之，该套系统缩短了发动机预热时间，提高了热效率，增强了冷却系统在发动机不同工况下的适应能力，与传统机械水泵相比，具有灵敏、精确的优点。
However , unsatisfactory results were obtained under the following conditions : discharge tube covered with glass cover , thermal dispersion conditions not as effective , thermal expansion of the discharge tube restricted by the co - axis glass cover ( longer preheat time , lower anti - interference ) 在放电管外有玻璃罩，散热条件差；放电管温度变形受外玻璃罩约束的同轴式管子上则效果不理想(预热时间较长，抗干扰能力不如前者) 。
According to the difference of the using characters of buildings , the heating system is divided into two categories , the continuous heating system and the intermittent heating system . to the intermittent heating system , it is essential to estimate accurately the preheat time . overestimation of preheat will cause unnecessary energy wastage whilst underestimation will lead to a loss of comfort conditions at the start of occupancy 对预热时间过分的估计(即tp的估计值大于实际值)会使在工作期未到来前房间的温度已经达到了舒适温度，这将导致燃料的浪费；反之，对预热时间估计不足(即tp的估计值小于实际值)将使在工作期到来时房间的温度还未达到舒适温度，这使人觉得不舒适。
