全部评论(2条)
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- ooggrree 2011-09-27 00:00:00
- 这个东东看不懂喔,Y1是什么?不会是传感器吧?你应把其余电路画出来,好分析
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- honglian0904 2011-09-27 00:00:00
- Y1是压电晶体受到压力或声音震动时会产生电压输出信号经C5送至相关电路
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赞(11)
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热门问答
- 大侠们帮我解释一下震动传感器吧报警的原理吧,这个电路图有点看不懂?
2011-09-26 02:42:16
344
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- 帮我解释一下这个温度变送器电路图
2018-11-14 13:16:45
408
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- 怎么创贴吧呢???帮我创一个吧
2009-05-16 12:08:04
294
2
- 这个是陨石吧
2015-06-06 17:12:05
334
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- 大神们帮帮忙吧,这实验怎么搞?
2016-12-29 15:27:26
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- 我的问题有点难吧?(女性问的)
- 我想问问大家谁知道,如果说一个人没有性病,没有阴道炎,那么她是不是就没有支原体感染呢,这是一个概念吗?应该差不多吧。... 我想问问大家谁知道,如果说一个人没有性病,没有阴道炎,那么她是不是就没有支原体感染呢,这是一个概念吗?应该差不多吧。 展开
2005-10-23 04:19:43
344
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- 请帮我翻译一段专业英语吧。。急用。。多谢。。。
- Practical applications of colossal magnetoresistive(CMR) oxides are limited by the large magnetic fields and/or low temperature required to observe a significant change in electric resistivity[1-5]. In recent years,research on tunneling mag... Practical applications of colossal magnetoresistive(CMR) oxides are limited by the large magnetic fields and/or low temperature required to observe a significant change in electric resistivity[1-5]. In recent years,research on tunneling magnetoresistance(TMR) is a very active field because of its scientific interest and potential technological applications[6].Polycrystalline Sr2FeMoO6 perovskite is a candidate for magnetic sensors owing to its high ferromagnetic transition temperature …(Tc~420K)and the half-metallic electronic band structure predicted theoretically [7]. The conduction electrons in this compound are expected to be highly spin-polarized even at room temperature. More recently, perovskite Sr2FeMoO6 with nanometer grain size showed large magnetoresistance(~20%) at a low magnetic field of 4k Oe and at room temperature[8].Dai et al.[9]observed two different ordered structures in polycrystalline Sr2FeMoO6 perovskite: the double perovskite and the superstructure with tripled c-axis(ST).In this paper, another new layered structure of body-centered tetragonal phase (BT) is reported for the polycrystalline magnetoresistive Sr2FeMoO6 sample. Ceramic samples of Sr2FeMoO6 were prepared by standard solid state reaction. Stoichiometric materials of SrCO3,Fe2O3 and MoO3 were mechanically mixed, and then calcined at 950℃ for 4h in air.The calcined mixture was then ball-milled and made into pellets followed by sintering at 1250℃for 4h in carbon monoxide atmosphere.Transmission electron microscopy(TEM) specimens were prepared by mechanical polishing,dimpling and ion milling.Electron diffraction patterns were taken at 120kV using a Phillips CM12 electron microscope, and high resolution TEM imaging was conducted using JEOL 2010 microscope. Energy dispersion of X-rays(EDX) was conducted by TEM attached with EDAX PV9100. 展开
2009-05-20 03:06:41
480
1
- 威力吧流量计的“吧”应该是哪个字呢?是“吧”还是“巴”?
2010-10-12 08:17:43
344
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- 大神们,能帮我解释一下什么是固态光触媒吗
2017-03-31 22:46:02
471
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- 血尿酸偏高谁知道啊?详细帮我介绍下吧
2012-05-05 03:35:17
413
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- 有点看不懂芯片介绍,能解释一下怎么样才能用单片机控制其发声
- 芯片为ISD1420,用单片机控制的接线和编程... 芯片为ISD1420,用单片机控制的接线和编程 展开
2010-10-30 04:05:58
473
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- 想来奉化打工,可以认识下吧友们吗
2018-12-11 15:09:39
272
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- 长假过后迎来高峰期,禾工“闪电侠”们出发吧!
十一长假过后上海禾工再次迎来了“小高峰”,生产、销售、技术又开始马不停蹄的忙碌起来。由于假期原因售后部积压了很多安调单子,禾工“闪电侠”们又要出发咯......
10月8日,技术工程师巫工、李工同时从上海出发,相继对江苏、河南、福建、成都、广西地区提供售后安调培训服务。
本次安调单位多为制药企业,因此禾工技术员主要针对标准的解读、卡尔费休水分测定仪的具体操作以及日常维护保养等进行了详细的沟通交流,并引导用户现场进行上机测样。提供行业专用应用实例!
在巡回售后培训服务过程中,其用心、专心的售后服务得到各区域用户一致好评!
用户影集
2019-10-21 16:14:24
191
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- 解释一下这个蒸馏装置的冷凝管的原理。
2018-04-01 19:06:20
395
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- questions!回答一下尿酸正常值吧!这个好得了吗???
2012-04-27 19:16:40
435
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- 本吧有没有自考华师数学教育的胖友们
2018-11-21 21:51:34
378
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- 这是雾化片吧?这连上电源可以用吧?
2017-08-21 20:30:07
512
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- 三菱PLC modbus rtu通讯谁能帮我解释一下这个表
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