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- banguijiu 2018-04-23 00:00:00
- c项是照射光越强,光电流越大。; D项是光电管工作电压越高,光电流越大。(仪器的高压旋钮)
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- 哪位大神帮我讲一下cd两项,光电效应搞不懂
2018-04-22 20:14:59
521
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- 谢谢哪位大神帮我翻译成英文。跪谢。
- 本文比较了目前国内几种常用的生产氯化钡的工艺流程,通过对工艺流程和影响产率的因素的分析,对结晶工艺过程进行了适当的改进,以毒重石残液为原料,用真空旋转蒸发结晶氯化钡的工艺... 本文比较了目前国内几种常用的生产氯化钡的工艺流程,通过对工艺流程和影响产率的因素的分析,对结晶工艺过程进行了适当的改进,以毒重石残液为原料,用真空旋转蒸发结晶氯化钡的工艺方法,探究出Z佳的工艺条件是水浴温度在85℃~90℃,控制旋转速率为42ran/min,维持真空度在0.085Mpa下,能生产高纯度的氯化钡产品。通过对结晶产品中的钙、镁、硫、铁含量的分析和讨论发现,原料液在循环利用后,氯化钡的纯度能达到98%左右。此外,由于原料液在蒸发结晶过程中对反应装置的材料有比较大的腐蚀性,探究了硫化钠对反应器的防腐蚀效果,得出在加入一定量的硫化钠后,在一定的时间段内对反应器的材料有保护作用。 展开
2013-06-13 22:36:28
242
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- 哪位大神帮我分析下电源原理图,谢谢
2018-12-05 12:56:09
261
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- 哪位高手能帮我翻译一下 谢谢了
- 3.3. Microbial mapping The intensity of resonance Raman spectra of Cyt c allows for integration times below one second. Microbial mapping of an area of 50×50 μm2 with a resolution of 500 nm/pixel (10,000 single spectra) can be perform... 3.3. Microbial mapping The intensity of resonance Raman spectra of Cyt c allows for integration times below one second. Microbial mapping of an area of 50×50 μm2 with a resolution of 500 nm/pixel (10,000 single spectra) can be performed in less than 3 h. A further reduction of the measuring duration by a factor of 10 can be achieved by utilisation of an EMCCD camera (Coates et al., 2004). Microbial mapping was done on granules from two different sequencing batch reactors (SBR) (Gaul et al., 2006). The SBRs are used to analyse control parameters for the anaerobic ammonium oxidation. Fig. 7 shows two different microbial colonies in the same granulum. A graphical analysis of the spectroscopic data at 750 cm-1 (dominant resonant Raman band of Cyt c) and 2900 cm-1 (CH stretching mode) differentiated the two colonies. One colony shows stronger Raman signals at 750 cm-1 (blue frame). Whereas the other microorganisms have more amount of methyl or methylene groups (yellow frame). After the graphical analysis above, an average spectrum was constructed for each colony. The resulting averaged spectra were transferred to our Raman database of wastewater bacteria created by OPUS. The software recognized the microorganisms Fig. 5. Time series of N. eutropha Nm 57 which is captured by optical tweezers. Time difference between spectra: 1 s; Laser power: 9 mW. The bleaching effect due to photo-dissociation caused by laser radiation is easy to see. Fig. 6. The spectral heterogeneity of hierarchical clusteringis strongly dependent to the integration time. Bacteria from the same strain are only groupedtogether if the exposure time was the same. 246 R. P?tzold et al. / Journal of Microbiological Methods 72 (2008) 241–248 in the left colony as anammox bacteria, those in the upper right corner as Nitrosomonas. 展开
2008-11-08 00:52:54
365
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- 哪位专家能帮我讲解一下电涡流振动传感器?
2011-08-09 07:08:35
263
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- 有哪位可以帮我合成一下呀只用无机试剂
2017-07-18 21:21:48
276
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- 谁能帮我讲一下多谐振荡器输出让蜂鸣器发声的原理
2012-08-31 11:08:01
263
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- 请好人帮我翻译一下,是关于空气采样计划的。都是英文搞不懂。
- Top10TakeAwaysforAirSampling.1.Therearetwoprinciplemeansofmonitoringthemicrobiologicalpopulationoftheair•passivemonitoring•activesampling2.Activemonitoringreq... Top 10 Take Aways for Air Sampling. 1. There are two principle means of monitoring the microbiological population of the air • passive monitoring • active sampling 2. Active monitoring requires the use of a microbiological air sampler to physically draw a known volume of air over, or through, a particle collection device. 3. The most important sources of contamination in any manufacturing operation are air, people, raw materials and water. 4. Passive monitoring is usually done using ‘settle plates’. 5. There are two types of active monitoring devices • Impingers • Impactors 6. It is essential that air samplers are properly validated and regularly calibrated to ensure accuracy. 7. The choice of sampling method is application dependent, according to ISO 14698-1, and must take into consideration: • appropriate flow rate impact velocity • collection accuracy and efficiency • effect of the sampling method on the surrounding environment 8. Choice of monitoring locations should be based upon a documented risk assessment. 9. The flow rate of the sampler pump or fan should be properly calibrated and validated against a certified flow meter. 10. Airborne bacterial and fungal cells and spores may be present in droplets as “bio-aerosols”, as very small individual particles that stay suspended for long periods, or as larger clumps and aggregates that settle rapidly onto surfaces. 展开
2012-08-23 08:22:26
454
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- LED灯 驱动电源哪位师傅帮我分析一下故障?
- LED灯 驱动电源哪位师傅帮我分析一下故障?上电后led灯亮一段时间后闪烁,闪过之后灯变成微亮。检查了led灯珠都是好的。问题在于电源…上电后电源出现噪音当led灯闪烁或微亮时电压会下降到几十伏。导致灯微亮或不亮,这个灯是功率45w 电压135v,经检查发现这... LED灯 驱动电源哪位师傅帮我分析一下故障?上电后led灯亮一段时间后闪烁,闪过之后灯变成微亮。检查了led灯珠都是好的。问题在于电源…上电后电源出现噪音当led灯闪烁或微亮时电压会下降到几十伏。导致灯微亮或不亮,这个灯是功率45w 电压135v,经检查发现这个变压器式电感出现磁饱和导致灯发光不正常。我的问题是要修这个驱动,这个电感又没烧掉,如果换新的电感有用吗?应该怎么修复?还是不能修了。 展开
2017-11-14 04:35:04
466
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- 急需涡轮流量计的保养步骤,哪位大神给普及一下!?
2015-11-24 20:46:16
361
1
- 哪位大神能讲解一下3d打印机挤出机的原理
2017-02-14 13:30:00
537
1
- 哪位电工大哥帮我确认一下我的电表度数。谢谢
- 房东说这个电表Z后一位数是小数点后面的。 可我认为,这个电表没有小数点。
2018-07-03 01:08:24
634
4
- 请哪位大神回答
- 例题:患者男,66岁。因嗜睡、意识模糊4小时,并两次抽搐后昏迷来院急诊。近1周因受凉后发热、咳嗽,到当地卫生院进行静脉输注葡萄糖液及肌注庆大霉素等ZL,3天后,出现乏力、口干、... 例题:患者男,66岁。因嗜睡、意识模糊4小时,并两次抽搐后昏迷来院急诊。近1周因受凉后发热、咳嗽,到当地卫生院进行静脉输注葡萄糖液及肌注庆大霉素等ZL,3天后,出现乏力、口干、多饮多尿等症状并日渐加剧,遂来院就诊。体格检查:T 38.8℃,P 108次/分,BP 150/75mmHg(20/10kPa)。肥胖体形,唇舌干燥,皮肤弹性差,无面瘫体征,颈无抵抗。左下肺可闻湿啰音。 问题1:急诊应首先ZD检查的项目包括 1.血清钾、钠、氯、钙 2.腰穿脑脊液检查 3.血气分析 4.尿糖 5.血脂 6.血糖 提示:血钾3.7mmol/L,血钠156mmol/L,血氯110mmol/L,血钙2.5mmol/L.血糖38.8mmol/L,尿糖(++++)。血酮(-),尿酮。AB 23mmol/L,TCO2 26mmol/L,BE -2,8mmol/L,SaO2 0.92,血浆渗透压358mmol/L. 问题2:目前的急诊诊断是 1.重度昏迷 2.脑血管意外 3.糖尿病酮症酸中毒昏迷 4.糖尿病乳酸性酸中毒昏迷 5.糖尿病高渗性无酮症性昏迷 6.非胰岛素依赖型(Ⅱ型)糖尿病 问题3:急诊处理措施包括 1.静脉输注5%葡萄糖液 2.静脉输注5%NaHCO3液 3.静脉输注0.45%氯化钠液或0.9%氯化钠液 4.静脉输注1.87%乳酸钠液 5.应用20%甘露醇脱水 6.皮下注射正规胰岛素 提示:静脉滴注正规胰岛素8单位,复查血钾3.0mmol/L,血钠150mmol/L,血糖32.4mmol/L,血浆渗透压328mmol/L.患者第1小时静脉补0.45%氯化钠液及0.9%氯化钠液1000ml.血压135/60mmHg(18/8kPa)。 问题4:目前正确的处理措施包括 1.静脉补钾 2.继续静滴0.45%氯化钠液 3.静脉输注5%葡萄糖液 4.可静脉输入血浆或全血 5.可静脉输入25%人体白蛋白 6.继续每小时静脉滴注正规胰岛素4~6单位 提示:患者经上述处理12小时,脱水状况减轻,意识恢复。体温37.3℃。复查血钾3.4mmol/L,血钠144mmol/L,血糖14.2mmol/L,血尿素氮10.8mmol/L,血肌酐133mmol/L.胸片示左肺感染。 问题5:目前应采取的处理措施包括 1.应用抗生素 2.继续静脉补钾 3.静脉输注10%葡萄糖液 4.继续静滴0.9%氯化钠液 5.鼓励患者饮水进食 6.继续静脉滴注胰岛素以使血糖降至正常范围 提示:经上述处理两天,患者已能进半流质饮食,尚有咳嗽、痰多黄黏。体温37℃~38.2℃。复查空腹血糖14.8mmol/L. 问题6:下一步ZL应进行的调整包括 1.皮下注射正规胰岛素控制血糖 2.皮下注射中效胰岛素控制血糖 3.按糖尿病要求控制饮食 4.给予磺脲类口服降血糖药ZL 5.给予双胍类口服降血糖药ZL 6.继续静脉滴注正规胰岛素 7.继续应用抗生素 第首先感谢您的回答。下面我就这个问题咱们商讨一下。 diyi个问题我也和你的意见一致。 第二个问题诊断5是正确的,但是否应该加上6呢?因为此病人应该是2型糖尿病吧。 第三个问题病人没有明显的酸中毒是不是不用碳酸氢钠呢?还有此时皮下注射正规胰岛素可行吗?病 人己昏迷,此时应当静脉滴注正规胰岛素吧? 第四个问题此补充全血、血浆或白蛋白的指征是什么?书上说的是有休克可用,病人并没合并休克。五个问题病人血糖己经降到了14.2mmol/L了,还要静脉滴注胰岛素吗? 第六个问题此时病人可以口服降糖药品吗?病人可是合并严重的急性并发症呀?另外同时应用胰岛素又服降糖药,会不会发生低血糖呢?病人血糖降到167mmol/L时,就可停用胰岛素了,只用5%GS配以1U胰岛素比2~4克糖,维持血糖在11.1mmol/L之间。 总之,我也拿不准,和您商讨。 展开
2017-03-03 10:54:35
347
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- 求大神帮我写一下java计时器的界面的题目
2018-11-15 11:46:28
336
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- 生物柴油市场容量与趋势 专业的!!哪位大神解一下??
2018-11-21 00:55:14
323
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- 哪位大神有三菱plc应用100例,能给我发一下吗?
2018-11-21 21:16:29
225
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- 谁帮我翻译一下
- LabVIEWTM(LaboratoryVirtualInstrumentEngineeringWorkbench)isapowerfulinstrumentationandanalysisprogramminglanguageforPCsrunningMicrosoftWindows,SunSPARCstations,AppleMaci... LabVIEWTM (Laboratory Virtual Instrument Engineering Workbench) is a powerful instrumentation and analysis programming language for PCs running Microsoft Windows, Sun SPARCstations, Apple Macintosh computers, Concurrent PowerMax, and HP-UX workstations. LabVIEW departs from the sequential nature of traditional programming languages and features a graphical programming environment and all the tools needed for data acquisition, analysis, and presentation. With this graphical programming language, called “G,” you can program in a block diagram notation, the natural design notation of scientists and engineers. After you create a block diagram program, LabVIEW compiles it into machine code. LabVIEW integrates data acquisition, analysis, and presentation in one system. For acquiring data and controlling instruments, LabVIEW supports RS-232/422, IEEE 488 (GPIB), and VXI, including Virtual Instrument Software Architecture (VISA) functions, as well as plug-in data acquisition (DAQ) boards. An instrument library with drivers for hundreds of instruments simplifies instrument control applications. For analyzing data, the extensive Analysis library contains functions for signal generation, signal processing, filters, windows, statistics, regression, linear algebra, and array arithmetic. Because LabVIEW is graphical in nature, it is inherently a data presentation package. LabVIEW can generate charts, graphs, and customized, user-defined graphics. 尽量翻的好一点,谢谢 能不能对GOOGLE自动翻译过的稍加修改下 展开
2008-03-24 08:56:44
496
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- 哪位大神会用这种信号发生器?
2018-12-07 09:18:44
293
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- 哪位高人能帮我看看手相
2011-06-17 01:59:28
282
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- 阿玛尼小滴管真假,各位大神帮我鉴定一下是不是真的 是哪一年的
2018-11-29 08:59:58
400
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