热门问答
- 农业喷灌旋转喷头的工作原理谁知道?请教一下,谢谢!
2016-04-20 00:35:01
301
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- pysh20a喷灌喷头图片
2017-09-02 13:42:20
391
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- 园林喷灌喷头每个每分钟的出水量
2017-06-05 02:22:42
603
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- 谁知道位移传感器工作原理和原理图的说下 ,谢谢……
2007-08-28 05:07:50
399
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- 旋转流变仪的工作原理
2018-11-13 11:43:37
271
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- 旋转蒸发器的工作原理?
2017-10-10 05:50:38
403
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- 旋转蒸发器工作原理?
2010-08-31 03:56:38
471
2
- 谁知道屏蔽箱的工作原理?
2012-09-27 01:37:48
711
4
- 谁知道工业内窥镜的工作原理
2017-10-06 03:43:52
345
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- 请教一下:英国伦敦的邮政编码是……?谢谢!
2011-03-22 10:34:10
654
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- 请问一下谁知道旋转式喷头射程的经验公式啊?
- 条件有很多 重赏中!!!
2016-02-15 16:08:45
489
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- 请问喷头的结构和工作原理
- 普通的喷水壶的喷头,为什么一压就可以喷(射)出来水雾。 就好像一些擦玻璃的清洁剂的容器也是这样的喷嘴。 各位大大可以给我一个具体的原理和机构么? 十分困惑
2013-03-16 19:11:48
536
2
- 不锈钢反应釜的工作原理谁知道?
- 有人清楚吗?
2013-05-09 02:41:15
506
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- 请教液位传感器的工作原理知识
- 请问有我是一名大学生是学的光电子专业老师Z近安排了一份作业给我们就是让我们在网上查找一篇关于液位传感器的资料要求要知道其工作原理和原理图,方框图每个组成部分是怎么工作的可... 请问有我是一名大学生 是学的光电子专业 老师Z近安排了一份作业给我们 就是让我们在网上查找一篇关于 液位传感器的资料 要求要知道其工作原理和原理图,方框图 每个组成部分是怎么工作的 可是我在网上查了好久也没查到我需要的资料 查到相关的也是一些不齐全的 希望好心的人 能帮助一下我 因为明天早上就要交作业了 在找不到 就要挨老师的 骂了 展开
2006-03-15 00:46:53
376
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- 气动控制开关的工作原理是什么谁知道
2017-01-09 19:45:16
284
1
- 1.BlueLevel重锤料位计的工作原理,谁知道?
2012-10-13 11:43:22
393
2
- ALPS旋转编码器工作原理是怎样的
2018-12-08 10:01:26
274
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- 热管蒸发器的工作原理是怎样的,请详细介绍一下,谢谢:)
2006-06-01 23:35:50
428
1
- 请教电感三点式振荡电路工作原理
- 如题。分析下图中震荡电路的工作原理。问题1,振荡信号在哪里输出?问题2,这个电路是如何把12v的直流信号变成带频率的交流正弦波信号的,关键元件是哪些?问题3,附带分析电路简图中... 如题。分析下图中震荡电路的工作原理。问题1,振荡信号在哪里输出?问题2,这个电路是如何把12v的直流信号变成带频率的交流正弦波信号的,关键元件是哪些?问题3,附带分析电路简图中,电容C2、C3的作用?谢谢指教! 展开
2012-05-26 22:39:23
565
2
- 请教英语高人,帮忙翻译一下.急用,谢谢!!!
- Theelementalcontentofrawmaterials,phosphogypsum,substrate(potassiumsalt),products(superphosphateand“Amofoska”),soil,andgrasswasdeterminedusingconventionalandepithermaln... The elemental content of raw materials, phosphogypsum, substrate (potassium salt), products (superphosphate and “Amofoska”), soil, and grass was determined using conventional and epithermal neutron activation analysis using the IBR-2 pulsed fast reactor at Frank Laboratory of Neutron Physics (FLNP), Joint Institute for Nuclear Research (JINR), Dubna, Russia. The analytical procedure was described elsewhere by Frontasyeva and Pavlov [15]. Quality control was based on the application of certified reference materials (CRMs): IAEA-336 (lichens), IAEA-SDM (lake sediment) and IAEA-SL1 (soil). The certified values and the results obtained by NAA were compared (Table 2). Concentrations of most elements were in good agreement with the CRMs except for Ti, Ni, Ce, Eu, Dy and Rb, which differed from the certified value as follows: Ti - 41.7 %, Ni - 26.5 %, Ce - 24.3 %, Eu - 32.9 % and Dy - 33.3 % in IAEA-SL1 (soil) and Rb - 20.6 % in IAEA-336 (lichens). For the 21 elements in agreement with the certified values the bias observed was below 20 %. For 11 elements (Al, V, Mn, As, Br, Sc, Cr, Sm, Na, Co and Sb), the bias ranged from 0.03 % to 5 %, for 5 elements (Fe, Zn, Ba, Th and Cs) the bias was greater than 5 % but lower than 10 %, and for 5 elements (La, Tb, Hf, Ta and U) the bias was determined to be between 10 % and 20 %. Samples of raw materials, phosphogypsum, substrate, products, soil (of about 0.1 g), and grass (0.3 g) were irradiated in cadmium-screened channels 1 and 2 of the pneumatic “Regata” system described elsewhere by Frontasyeva and Pavlov [15]. In order to determine elements associated with long-lived radionuclides, samples were irradiated for 100 hours. Spectra of induced gamma activity were recorded after 4 and 20-24 days of cooling. Short irradiations, 5 minutes for grass samples and 60 seconds for the remaining samples, allowed determination of Al, Ca, Cl, I, K, Na, Mg, Mn, Ti and V. Gamma-ray spectra were recorded after 5 and 12 minutes after irradiation. Data processing was performed using software developed at FLNP JINR [16, 17]. All gamma-spectrometers and counting electronics were made at JINR [16]. The software developed at FLNP JINR for peak searching, peak fitting, and nuclide identification routines were used for processing the amplitude spectra [16]. In the case of the lack of analytical data, there was a half of the detection limit inserted for each analyte [18]. Principal component analysis (classical PCA and fuzzy PCA) was performed as a tool for searching the possible correlations between environmental and industrial samples that could implicate the impact of phosphatic fertilizer production on the environment adjacent to the plant. 请给一个比较能看懂的翻译,谢谢. 展开
2007-06-03 08:49:34
459
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