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頻譜熱療床墊跟泡角哪個(gè)好有什么區(qū)別,請(qǐng)知道的人幫忙分析一下提個(gè)建

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  • 頻譜熱療床墊跟泡角哪個(gè)好有什么區(qū)別,請(qǐng)知道的人幫忙分析一下提個(gè)建議。謝謝!

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頻譜熱療床墊跟泡角哪個(gè)好有什么區(qū)別,請(qǐng)知道的人幫忙分析一下提個(gè)建
頻譜熱療床墊跟泡角哪個(gè)好有什么區(qū)別,請(qǐng)知道的人幫忙分析一下提個(gè)建議。謝謝!
2018-12-10 16:28:27 260 0
請(qǐng)專家?guī)兔Ψ治鲆幌履虺R?guī)
患者信息:女 50歲 天津 南開(kāi)區(qū) 病情描述(發(fā)病時(shí)間、主要癥狀等): 白細(xì)胞 97.5↑ 紅細(xì)胞36.7↑ 上皮細(xì)胞 28.2 管型 0.53 白細(xì)胞(高倍視野) 17.6↑ 紅細(xì)胞(高倍視野)6.6↑ 上皮細(xì)胞 (高倍視野)5.1 管型 (低倍視野) 0.53 病理管型0.53 結(jié)晶數(shù)量0 小圓... 患者信息:女 50歲 天津 南開(kāi)區(qū) 病情描述(發(fā)病時(shí)間、主要癥狀等): 白細(xì)胞 97.5↑ 紅細(xì)胞36.7↑ 上皮細(xì)胞 28.2 管型 0.53 白細(xì)胞(高倍視野) 17.6↑ 紅細(xì)胞(高倍視野)6.6↑ 上皮細(xì)胞 (高倍視野)5.1 管型 (低倍視野) 0.53 病理管型0.53 結(jié)晶數(shù)量0 小圓上皮細(xì)胞數(shù)量 1.7 類酵母細(xì)胞數(shù)量0 尿膽原 Normal 膽紅素 NEG 酮體NEG 隱血NEG 蛋白質(zhì)NEG 亞硝酸鹽NEG 白細(xì)胞酯酶+- Ca15 葡萄糖NEG 比重1.020 PH酸堿度 6.5 維生素C 0 微白蛋白NEG 展開(kāi)
2012-03-12 14:56:37 399 2
請(qǐng)幫忙分析一下血細(xì)胞分析報(bào)告單,謝謝~
血細(xì)胞分析報(bào)告單參數(shù)報(bào)警結(jié)果參考范圍WBC白細(xì)胞數(shù)目4.9*10^9/L4.0-10.0LYMPH#淋巴細(xì)胞數(shù)目1.0*10^9/L0.6-4.1MID#中間細(xì)胞數(shù)目0.0*10^9/L0.1-1.8GRAN#中性粒細(xì)胞數(shù)目L3.9*10^9/L2.0-7... 血細(xì)胞分析報(bào)告單 參數(shù) 報(bào)警 結(jié)果 參考范圍 WBC白細(xì)胞數(shù)目 4.9*10^9/L 4.0-10.0 LYMPH#淋巴細(xì)胞數(shù)目 1.0*10^9/L 0.6-4.1 MID#中間細(xì)胞數(shù)目 0.0*10^9/L 0.1-1.8 GRAN#中性粒細(xì)胞數(shù)目 L 3.9*10^9/L 2.0-7.8 LYMPH%淋巴細(xì)胞百分比 21.4% 20.0-40.0 MID%中間細(xì)胞百分比 1.9% 1.0-15.0 GRAN%中性粒細(xì)胞百分比 H 76.7% 50.0-70.0 HGB血紅蛋白 141g/L 110-160 RBC紅細(xì)胞數(shù)目 5.04*10^12/L 3.50-5.50 HCT紅細(xì)胞壓積 H 52.0% 36.0-48.0 MCV平均紅細(xì)胞體積 H 103.3fL 80.0-99.0 MCH平均紅細(xì)胞血紅蛋白含量 27.9 26.0-35.0 MCHC平均紅細(xì)胞血紅蛋白濃度 L 271 300-380 RDW-CV紅細(xì)胞分布寬度變異系數(shù) 12.0% 11.5-14.5 RDW-SD紅細(xì)胞分布寬度標(biāo)準(zhǔn)差 49.5 35.0-56.0 PLT血小板數(shù)目 256*10^9 100-300 MPV平均血小板體積 8.2 7.4-10.4 PDW血小板分布寬度 H 17.5 15.0-17.0 PCT血小板壓積 0.209% 0.108-0.282 醫(yī)院醫(yī)生說(shuō)我有點(diǎn)感冒,但是我沒(méi)有感冒的癥狀。有時(shí)候坐著就算慢慢地站起來(lái)也會(huì)眼前發(fā)黑,腦袋有充血的感覺(jué),眼前黑幾分鐘,覺(jué)得是貧血,但是醫(yī)生說(shuō)沒(méi)有貧血(請(qǐng)幫忙判斷一下)。還有我的指甲貼肉的部分異常紅,家里人的指甲貼肉部分都是偏白的,不知道這是什么原因(請(qǐng)解釋一下有沒(méi)有什么問(wèn)題)。然后手腳總是冰冷的,有時(shí)候嘗試捂熱,但是捂不很熱,還出汗(請(qǐng)解釋一下這是什么原因)。謝謝! 展開(kāi)
2013-02-20 02:54:45 523 2
請(qǐng)幫忙分析一下原理圖電源部分
電源部分有VBTN(12V轉(zhuǎn)5V芯片的輸出,5V/1.)和VUSB(USB供電,5V/500mA)兩種電源,如果兩種電源同時(shí)存在的話,會(huì)不會(huì)因?yàn)槠渲幸粋€(gè)電源內(nèi)阻小,電流倒灌導(dǎo)致電源燒壞?如果不會(huì)燒壞電源的話,麻煩講解一下為什么。另外,兩個(gè)5V電源疊加后輸出的電源還是5V嗎... 電源部分有VBTN(12V轉(zhuǎn)5V芯片的輸出,5V/1.)和VUSB(USB供電,5V/500mA)兩種電源,如果兩種電源同時(shí)存在的話,會(huì)不會(huì)因?yàn)槠渲幸粋€(gè)電源內(nèi)阻小,電流倒灌導(dǎo)致電源燒壞?如果不會(huì)燒壞電源的話,麻煩講解一下為什么。另外,兩個(gè)5V電源疊加后輸出的電源還是5V嗎?電流是兩個(gè)電源的輸出電流之和嗎? 展開(kāi)
2018-05-08 02:14:20 458 1
請(qǐng)幫忙分析一下這個(gè)開(kāi)關(guān)電源的原理。
2015-12-09 14:20:33 362 1
尿檢結(jié)果請(qǐng)各位幫忙分析一下 急?。?
BLD +3 *10.0mg/1 KET +1 * 1.0mmo1/1
2009-03-27 11:59:34 367 3
一份血細(xì)胞分析報(bào)告單 請(qǐng)專家?guī)兔Ψ治鲆幌?!謝謝!!
項(xiàng)目代號(hào)及名稱測(cè)試結(jié)果參考范圍WBC白細(xì)胞3.8【*10^9/L】(4.0-10.0)RBC紅細(xì)胞3.45[×10^12/L](3.5-5.5)HGB血紅蛋白68[g/L](110-160)PLT血小板202[×10^9/L](100-300)NEU嗜... 項(xiàng)目代號(hào)及名稱 測(cè)試結(jié)果 參考范圍 WBC 白細(xì)胞 3.8【*10^9/L】 (4.0-10.0) RBC 紅細(xì)胞 3.45[×10^12/L] (3.5-5.5) HGB 血紅蛋白 68[g/L] (110-160) PLT 血小板 202[×10^9/L] (100-300) NEU 嗜中性粒細(xì)胞 1.93 50.9[%] (50.0-75.0) EOS 嗜酸性粒細(xì)胞 0.05 1.3[%] (0.5-5.0) DAS 嗜堿性粒細(xì)胞 0.01 0.3[%] (0-2.0) LYM 淋巴細(xì)胞 1.54 40.6[%] (20.0-40.0) MON 單核細(xì)胞 0.26 6.9[%] (3.0-10.0) ALY 異型淋巴細(xì)胞 0.03 1.0[%] (0-2.0) LIC 巨大不成熟細(xì)胞 0.00 0.1[%] (0-2.0) HCT 紅細(xì)胞壓積 0.245[L/L] (0.35-0.50) MCV 紅細(xì)胞平均體積 71[∫L] (82-95) RDW 紅細(xì)胞體積分布寬度 12.3[%] (7.0-18.0) MCH 紅細(xì)胞平均血紅蛋白含量 19.7[pg] (27.0-31.0) MCHC 紅細(xì)胞平均血紅蛋白濃度 278[g/L] (320-360) PCT 血小板壓積 0.176[L/L] (0.11-0.28) MPV 血小板平均體積 8.7[fL] (9.4-12.5) PDW 血小板體積分布寬度 19.8[%] (15.5-18.0) 這是我媽媽的報(bào)告單。其中大部分都偏低,能看出是什么原因嗎?過(guò)幾天還要去醫(yī)院檢查 但是想先征求一下專家們的意見(jiàn) 。謝謝大家!! 我也知道是貧血啊 可是是什么原因?qū)е碌哪亍ぁ? 展開(kāi)
2007-09-13 05:31:33 441 3
加急~!請(qǐng)幫忙分析一下我的血細(xì)胞報(bào)告
女16歲希望能幫忙逐項(xiàng)分析一下,謝謝啦。。WBC14.8x109/LRBC4.92x1012/LHCB157g/LPTL299x109/LS0.57L0.27M0.05異L0.12... 女 16歲 希望能幫忙逐項(xiàng)分析一下,謝謝啦。。 WBC 14.8x10 9/L RBC 4.92x10 12/L HCB 157g/L PTL 299x10 9/L S 0.57 L 0.27 M 0.05 異L 0.12 展開(kāi)
2009-03-24 08:44:57 307 3
請(qǐng)幫忙翻譯一下,拜托
A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array, which was synthesized by anodizing Ti foils in an HF... A new kind of TiO2 nanotube array/Ni(OH)2 (TiO2/Ni(OH)2) composite electrode with the storage ability of light energy was prepared by the deposition of Ni(OH)2 on the TiO2 nanotube array, which was synthesized by anodizing Ti foils in an HF aqueous solution. SEM and XRD results showed that Ni(OH)2 particles were well distributed on high density, well-ordered and uniform TiO2 nanotube arrays. The photoelectrochemical properties of the TiO2/Ni(OH)2 electrode were investigated in NaHCO3/NaOH buffer solution (pH 10) by means of UV–vis absorption spectra, cyclic voltammogram (CV) and photocurrent measurements. It was found that the TiO2/Ni(OH)2 electrode was highly sensitive to light and exhibited excellent photoelectrochromic properties. Upon UV irradiation, the photogenerated holes by TiO2 nanotube arrays can oxidize Ni(OH)2 to NiOOH, and thus the TiO2/Ni(OH)2 electrode can be photo-charged by light。1. Introduction Among many visible light photocatalysts, TiO2nanostructures have attracted much attention due to high photocatalytic activ-ity, nontoxicity, chemical stability and huge potential applications [1–6]. The TiO2 nanotube array is one of most attention-getting TiO2nanostructures because of large surface area and outstanding charge transport properties. TiO2nanotube arrays can be utilized in dye-sensitized solar cells[7–9], photocatalysis and hydrogen gas sensing [10]. So far, a variety of methods have been attempted to prepare TiO2 nanotube arrays, such as hydrothermal synthe-sis[11], Langmuir–Blodgett technique [12], solution casting [13] and anodization technique[10,14], etc. Among these methods, the anodization technique has many advantages of low cost, low tem-perature and easy to be scaled up to large-area preparation. Recently, anewkindof photo-functional systemwith theenergy storage ability has been developed by coupling TiO2 photosen-sitive electrode with energy storage materials. In Takahashi and Tatsuma’swork[15],aTiO2/Ni(OH)2bilayer thinfilmwas suggested for the oxidative energy storage. In this case, a redox-activep-type semiconductor Ni(OH)2is coupled withn-type TiO2photocatalyst to formap–njunction,WhenTiO2is illuminatedby light, holesgen-erated at the junction are separated from excited electrons, trans-ported into the bulk of Ni(OH)2and oxidized Ni(OH)2to NiOOH. Therefore, the oxidative energy storage system was constructed 展開(kāi)
2012-11-13 20:08:52 530 1
幫忙分析一下尿常規(guī)???
WBC - 0Cell/uL KET - 0mmol/L NlT - URO Normal BlL - 0umol/L PRO - 0g/L GLU - 0mmol/L SG 1.030 PH 5.5 *BLD + - 10Cell/uL CR 4.4mmol/L Ca 2.5mmol/L MA 0mg/L 尿沉渣鏡檢 膿細(xì)胞 少/HP 上皮細(xì)胞 +/HP 紅細(xì)胞... WBC - 0Cell/uL KET - 0mmol/L NlT - URO Normal BlL - 0umol/L PRO - 0g/L GLU - 0mmol/L SG 1.030 PH 5.5 *BLD + - 10Cell/uL CR 4.4mmol/L Ca 2.5mmol/L MA 0mg/L 尿沉渣鏡檢 膿細(xì)胞 少/HP 上皮細(xì)胞 +/HP 紅細(xì)胞 管型 結(jié)晶 都是一個(gè)0中間一橫。我不知道是什么意思? 展開(kāi)
2009-11-12 03:24:55 422 4
復(fù)檢尿常規(guī),有一些疑惑。請(qǐng)懂的人幫分析一下。
干化學(xué)項(xiàng)目:白細(xì)胞2+ 尿蛋白1+ 尿沉渣項(xiàng)目:白細(xì)胞38.3(高倍視野)6.9 紅細(xì)胞28.6 (高倍視野)5.2 上皮細(xì)胞171.9 (高倍視野)30.9細(xì)菌2311.1(高倍視野)23.1我現(xiàn)在在什么狀況?如何治理?
2013-04-26 23:31:44 518 5
男性尿常規(guī)檢驗(yàn)報(bào)告.請(qǐng)大家?guī)兔庾x分析一下~
細(xì)菌BACT 結(jié)果: 28.70 單位H/ul 參考值 0~11.4 尿比重SG 結(jié)果: 1.035 單位H 參考值1.003~1.030 紅細(xì)胞計(jì)數(shù)RBC 結(jié)果:13.60 單位/ul 參考值0~15 白細(xì)胞計(jì)數(shù)WBC 結(jié)果11.80 ... 細(xì)菌BACT 結(jié)果: 28.70 單位H/ul 參考值 0~11.4 尿比重SG 結(jié)果: 1.035 單位H 參考值1.003~1.030 紅細(xì)胞計(jì)數(shù)RBC 結(jié)果:13.60 單位/ul 參考值0~15 白細(xì)胞計(jì)數(shù)WBC 結(jié)果11.80 單位/ul 參考值0~18 上皮細(xì)胞EC 結(jié)果1.50 單位/ul 參考值0~5.7 管型CAST 結(jié)果0.26 單位/ul 參考值:0~2.25 病理管型P.CAST 結(jié)果0 單位/ul 參考值0~0.5 結(jié)晶數(shù)量XTAL 結(jié)果0 單位/ul 參考值0~10 小圓上皮細(xì)胞SRC 結(jié)果1.40 單位/ul 參考值0~3 酵母細(xì)胞YLC 結(jié)果0 單位/ul 參考值0~10 電導(dǎo)率CONDUCT 結(jié)果17.80 單位mS/cn 參考值0~39 粘液絲MUCUS 結(jié)果0 尿路感染癥UTI 結(jié)果:未提示 紅細(xì)胞信息RBCINF 結(jié)果:未提示 顏色U 結(jié)果:淡黃 尿糖GLU 結(jié)果:正常 尿膽紅素BIL 結(jié)果:陰性(-) 參考值:陰性 尿酮體KET 結(jié)果2+ 參考值:陰性 尿潛血BLD 結(jié)果:陰性(-) 參考值:陰性 尿PH值 結(jié)果:6.50 參考值:5~9 尿蛋白PRO 結(jié)果:2+ 參考值:陰性 尿膽原UBG 結(jié)果:1+ 參考值:陰性 尿亞硝酸鹽NIT 結(jié)果:陰性(-) 參考值:陰性 尿白細(xì)胞檢查L(zhǎng)EU 結(jié)果:陰性(-) 參考值:陰性 渾濁度TURB 結(jié)果:陰性(-) 管型鏡檢CAST 結(jié)果:未檢出 展開(kāi)
2012-10-28 05:04:53 644 1
請(qǐng)各位大蝦幫忙翻譯一下:
Withmorethan6millionnewmeasurementchannelssoldlastyear,NationalInstrumentsisaworldwideleaderinvirtualinstrumentation.Engineershaveusedvirtualinstrumentationformorethan25y... With more than 6 million new measurement channels sold last year, National Instruments is a worldwide leader in virtual instrumentation. Engineers have used virtual instrumentation for more than 25 years to bring the power of flexible software and PC technology to test, control, and design applications making accurate analog and digital measurements from DC to 2.7 GHz. This document provides an excellent introduction to virtual instrumentation as well as additional resources for continued research. What is virtual instrumentation? With virtual instrumentation, software based on user requirements defines general-purpose measurement and control hardware functionality. Virtual instrumentation combines mainstream commercial technologies, such as the PC, with flexible software and a wide variety of measurement and control hardware, so engineers and scientists can create user-defined systems that meet their exact application needs. With virtual instrumentation, engineers and scientists reduce development time, design higher quality products, and lower their design costs. 展開(kāi)
2007-05-22 09:38:51 477 3
請(qǐng)高手幫忙翻譯一下 3
2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron mic... 2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron microscopy (SEM-PHILIPSk XL20) was used for photomicrographs as well as to analyse the Ch-zeolite composition (Energy Dispersion X-ray, EDX). The sample was initially placed in a vacuum chamber for coating with a thin layer (few nanometers) of gold (Au). The specific surface area of the material was measured by the methylene blue technique and by nitrogen gas adsorption methods, with the latter also providing information about particle porosity. In the methylene blue adsorption method, aqueous solutions (50 ml) of methylene blue (100 mg l 1) were agitated using an orbital shaker (Marconik) for an hour at room temperature in the presence of different quantities of the Ch-zeolite (0.05–0.3 g). The suspensions were then allowed to settle for 23 h and the resulting supernatants were centrifuged at 5000 rpm before the analysis of the residual methylene blue concentration. Results obtained correspond to averaged values of three different experiments. The specific surface area was evaluated by the Langmuir model, assuming the formation, at high concentrations, of a dye monolayer and 1.08 nm2 molecule 1, for the cross-sectional area (Van den Hul and Lyklema, 1968). The Ch-zeolite specific surface area was evaluated by the nitrogen gas adsorption method, using automated equipment (Autosorb 1-Quantachrome Instrumentsk), employing multipoint BET isotherm adsorption data fitting. Also from these data, the porosity of the material was evaluated through parameters such as volume of total pores (d < 206 nm), surface area and volume of micropores (d < 2 nm; Micropore Analysis Method). Zeta potential measurements for the natural and ammonia loaded zeolite, as a function of medium pH, were determined using a Zeta Plusk equipment (Brookhaven Instruments). Suspensions (0.01% v/v) of the Ch-zeolite, previously sieved below 37 Am (400 Mesh Tylerk), in a 10 3 mol l 1 solution of KNO3 were used and the medium pH was controlled with the addition of HNO3 (pH< 7) and KOH (pH>7), separately. For the Ch-zeolite saturated with ammonia, suspensions of the material were prepared by the same procedure, except that the sample was loaded with 100 mg NH3–N l 1 of ammonia. 展開(kāi)
2018-11-22 17:49:22 328 0
請(qǐng)專家?guī)兔Ψg一下,謝謝!
粒度檢測(cè)方法與優(yōu)缺點(diǎn)比較 粉末粒度分布的測(cè)量方法經(jīng)過(guò)百余年的發(fā)展,據(jù)統(tǒng)計(jì)至少已經(jīng)發(fā)展了上百種,但隨著科技的發(fā)展,有些方法被逐步淘汰,有些方法得到了改進(jìn)和發(fā)展(如激光散射法、動(dòng)態(tài)光散射等), 并在生產(chǎn)、科研中得到了廣泛的應(yīng)用,現(xiàn)在普遍使用的測(cè)量... 粒度檢測(cè)方法與優(yōu)缺點(diǎn)比較 粉末粒度分布的測(cè)量方法經(jīng)過(guò)百余年的發(fā)展,據(jù)統(tǒng)計(jì)至少已經(jīng)發(fā)展了上百種,但隨著科技的發(fā)展,有些方法被逐步淘汰,有些方法得到了改進(jìn)和發(fā)展(如激光散射法、動(dòng)態(tài)光散射等), 并在生產(chǎn)、科研中得到了廣泛的應(yīng)用,現(xiàn)在普遍使用的測(cè)量方法有篩分法、顯微圖像法、光透沉降法、激光散射(衍射)法等幾種,下面簡(jiǎn)單介紹幾種常用的粒度測(cè)量方法。 ▲ 篩分法 是一種具有很長(zhǎng)歷史的粒度測(cè)定方法,篩分法粒度測(cè)量是利用一組篩孔大小不同的標(biāo)準(zhǔn)篩將粉末進(jìn)行篩分,然后對(duì)每個(gè)篩上樣品分別進(jìn)行稱重,進(jìn)而得到以質(zhì)量為量綱的粒度分布數(shù)據(jù),并可由分布結(jié)果計(jì)算出如Dv50等其它參數(shù)。篩分滶要特點(diǎn)是測(cè)量成本低廉,操作簡(jiǎn)單,但存在著如重復(fù)性差,測(cè)量時(shí)間較長(zhǎng),不能對(duì)5um以下的顆粒進(jìn)行測(cè)量等缺點(diǎn)。 ▲顯微圖像分析法 利用光學(xué)或電子顯微鏡及計(jì)算機(jī)圖像識(shí)別技術(shù)對(duì)顆粒粒度及粒度分布,顆粒形貌進(jìn)行測(cè)量,分析的方法。這種方法不僅能夠測(cè)量粒度分布而且能夠直接觀察到顆粒的形狀,是目前唯yi的一種可目視的直觀測(cè)試方法,這種特點(diǎn)也是其它粒度測(cè)量?jī)x器所不具備。這種方法的優(yōu)點(diǎn)是直觀、簡(jiǎn)便、費(fèi)用低,缺點(diǎn)是由于取樣量很少,為使測(cè)量結(jié)果代表性,必須增加待測(cè)顆粒的個(gè)數(shù)(一般認(rèn)為測(cè)量顆粒的個(gè)數(shù)應(yīng)在1000個(gè)以上),這就相應(yīng)嗇了測(cè)量時(shí)間,及測(cè)試人員的工作強(qiáng)度,但由于能夠?qū)︻w粒形貌(如長(zhǎng)徑比等)進(jìn)行測(cè)量,目前也有廣泛應(yīng)用。 ▲光透沉降法 沉降法粒度測(cè)試的理論基礎(chǔ)是斯托克司定律和比爾定律。前者給出顆粒沉降速度與粒徑的關(guān)系,后者闡明光透過(guò)率與粒徑重量的關(guān)系??珊?jiǎn)單的描述為:在沉降液中,有若干相同比重的顆粒,如果同一時(shí)刻,從同一位置開(kāi)始下降,則不同直徑的顆粒到達(dá)測(cè)量區(qū)的時(shí)間是不同的,根據(jù)顆粒到達(dá)測(cè)量區(qū)的時(shí)間,及光強(qiáng)的強(qiáng)弱,就可以計(jì)算出顆粒的粒徑,及相應(yīng)粒徑的顆粒在顆粒群中占有的比例。采用此種原理的測(cè)量?jī)x器有比較長(zhǎng)的使用歷史,但隨著科技的發(fā)展和測(cè)量手段的進(jìn)步,此方法的缺點(diǎn)也日益突出,如測(cè)量時(shí)間長(zhǎng),重復(fù)性誤差大等。 ▲ 激光散射法 顆粒測(cè)量?jī)x器是以富朗和菲衍射(Fraunhofer diffraction)和米氏散射(Mie scattering)為理論基礎(chǔ)。此理論可以簡(jiǎn)單理解為沿直線傳播的平行激光束,在傳播過(guò)程中遇到顆粒的遮擋后,傳播方向發(fā)生了改變(即發(fā)生了衍射和散射現(xiàn)象),并且大顆粒使激光改變的角度小,小顆粒改變大。(實(shí)際上是由于顆粒的遮擋在無(wú)限遠(yuǎn)處形成了一個(gè)愛(ài)里斑,愛(ài)里斑87%的能量集中在ZX亮環(huán),且顆粒直徑越大,ZX環(huán)越小,顆粒直徑越小ZX亮環(huán)越大)。如果能在不同角度上接收光能, 對(duì)于相應(yīng)的的角度,其光能是對(duì)應(yīng)直徑的顆粒集合發(fā)生衍射(散射)造成的,相應(yīng)其他角度上光能的強(qiáng)弱也就反應(yīng)了對(duì)應(yīng)直徑顆粒在整個(gè)顆粒集合中占有的比例。 ▲ 采用激光粒度測(cè)量?jī)x器相對(duì)于光透沉降粒度測(cè)量?jī)x器具有很多優(yōu)點(diǎn): 1. 原理先進(jìn),并且由于測(cè)試過(guò)程中沒(méi)有需要預(yù)先設(shè)定的參數(shù)(如樣品比重、介質(zhì)黏度、環(huán)境溫度等),及在測(cè)量過(guò)程中隨時(shí)改變的條件, 因此測(cè)量結(jié)果準(zhǔn)確、可靠。 2. 測(cè)量速度快,測(cè)試時(shí)間與樣品粒度分布無(wú)關(guān),典型測(cè)試過(guò)程一般小于一分鐘; 3. 每次測(cè)試,多次對(duì)樣品進(jìn)行掃描,測(cè)試結(jié)果重復(fù)性好; 4. 進(jìn)樣方式種類多,可適用于各種類樣品。 展開(kāi)
2016-03-07 05:37:01 674 1
熱療的簡(jiǎn)介
 
2018-11-21 09:33:30 226 0
熱療的記載
 
2018-11-13 02:47:23 295 0
高分辨質(zhì)譜精確分子量怎么計(jì)算的,請(qǐng)知道的人指點(diǎn)一下
 
2017-07-29 20:02:41 563 1
請(qǐng)幫忙分析一下配置, 主要幫我選選電源和機(jī)箱
主板: 捷波悍馬HI09-Z(Z68) CPU: I3 2120 內(nèi)存: 芝奇8GB DDR3 1600 (2*4G套裝) 顯卡: 華碩 ENGTX460+ DC/2DI/1GD5版 固態(tài)硬盤(pán): 鎂光M4 64G 硬盤(pán)我是打算先買個(gè)固態(tài)硬盤(pán)用著, 現(xiàn)在機(jī)械硬盤(pán)價(jià)格有點(diǎn)怪異, 等過(guò)斷時(shí)間降下來(lái)之后再買個(gè)希捷2T用. SSD就裝... 主板: 捷波悍馬HI09-Z(Z68) CPU: I3 2120 內(nèi)存: 芝奇8GB DDR3 1600 (2*4G套裝) 顯卡: 華碩 ENGTX460+ DC/2DI/1GD5版 固態(tài)硬盤(pán): 鎂光M4 64G 硬盤(pán)我是打算先買個(gè)固態(tài)硬盤(pán)用著, 現(xiàn)在機(jī)械硬盤(pán)價(jià)格有點(diǎn)怪異, 等過(guò)斷時(shí)間降下來(lái)之后再買個(gè)希捷2T用. SSD就裝系統(tǒng)和個(gè)別游戲好了. 裝win7 64位系統(tǒng). 顯示器我打算買AOC的e2352Pz, 不知道有沒(méi)有用過(guò)的. 顯卡我比較喜歡華碩 翔升 索泰的. 我用的也一直是intel平臺(tái)和N卡. CPU我現(xiàn)在只看I3和I7, 不過(guò)I7的話現(xiàn)在預(yù)算不夠. 平時(shí)我用電腦基本不超頻. 請(qǐng)針對(duì)這個(gè)配置發(fā)表一下意見(jiàn), 看看有沒(méi)有奇怪的地方, 順便推薦一下電源和機(jī)箱, 機(jī)箱我希望要防塵效果好點(diǎn)的. 價(jià)位平民一些. 謝謝各位了. 展開(kāi)
2012-02-15 01:23:22 536 2

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