(2.5)质量浓度的空间分布特征.结果表明:陕西省各地级市PM_(2.5)浓度值月变化趋势呈"U"字型,具有"冬季高夏季低"的特点,PM_(2.5)质量浓度空间分布上呈现出北部较低,南部偏高,中部最高的特点.其中,咸阳市,西安市的PM_(2.5)浓度全年居高,延安市,商洛市的PM_(2.5)浓度偏低.最后提出了PM_(2.5)浓度的控制措施...
T Michio,津久井 道夫,S Kenji,須藤 健二 摘要: PROBLEM TO BE SOLVED: To provide an actuator capable of driving a rod-like member using a simple structure, without the use of an electromagnetic motor or the like.收藏 引用 批量引用 报错 分享 ...
A 12 bit 1 MS/s single-ended self-calibrating successive approximation analog-to-digital converter(SAR ADC) was designed. A series three-segment 7 bit calibration DAC array structure was proposed to calibrate the high 6 bit error voltage. The proposed structure achieved the purpose of reducing ...