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- 制備色譜的書都有哪些？ 請大家?guī)兔ν扑]一下，感謝！
2011-01-19 03:00:20
399
2
- 大家?guī)兔ν扑]一款3K一下的女性筆記本電腦
- 用途主要是：上網(wǎng) 看電影 偶爾辦公一下，當然要性價比高一點的 我看中了一款微星的 下面有參數(shù) 朋友們看看還有沒有更好的推薦，或者對下面這款 進行一下 評價 微星VR430X QL622G2參數(shù)<<返回微星VR430X QL622綜述 <<返回查看微星筆記本電腦主要性能 上市... 用途主要是：上網(wǎng) 看電影 偶爾辦公一下，當然要性價比高一點的 我看中了一款微星的 下面有參數(shù) 朋友們看看還有沒有更好的推薦，或者對下面這款 進行一下 評價 微星VR430X QL622G2參數(shù)<<返回微星VR430X QL622綜述 <<返回查看微星筆記本電腦主要性能 上市時間 2009年03月 網(wǎng)上報價 2999 產(chǎn)品類型 家用 產(chǎn)品定位 日常辦公本 處理器系列 AMD 速龍 處理器型號 AMD Athlon 64 X2 QL-62 標稱主頻 2GHz 前端總線 1800MHz 主板芯片組 AMD RS780+SB700 標配內(nèi)存容量 2GB 內(nèi)存類型 DDRII Z大支持內(nèi)存 4GB 硬盤/光驅(qū) 硬盤容量 250GB 硬盤描述 5400轉(zhuǎn) 光驅(qū)類型 DVD刻錄機 設計類型 光驅(qū)內(nèi)置 光驅(qū)描述 支持DVD SuperMulti雙層刻錄 顯卡/音效 顯卡類型 集成顯卡 顯卡芯片 AMD Radeon HD3200 顯存/位寬 共享內(nèi)存容量 顯存類型 無 音頻系統(tǒng) 內(nèi)置立體聲音效芯片 顯示屏 屏幕尺寸 14.1英寸 屏幕比例 16:10 屏幕分辨率 1280×800 背光技術(shù) CCFL背光 尺寸/重量 筆記本重量 2200g 外形尺寸 330×240×25-37mm 機殼材質(zhì) 復合材質(zhì) 網(wǎng)絡通信 無線網(wǎng)卡 支持802.11b/g/n無線協(xié)議 網(wǎng)卡描述 1000Mbps以太網(wǎng)卡 支持藍牙 無 調(diào)制解調(diào)器 56K 鼠標/鍵盤 指取設備 觸摸板 接口 USB接口 3×USB2.0 擴展接口 ExpressCard 讀卡器 3合一讀卡器(MMC/SD/MS) 視頻輸出 VGA接口 其他接口 RJ45R、J11、耳機/麥克風輸出 電源描述 電池類型 6芯鋰電池 續(xù)航時間 具體時間視使用環(huán)境而定 電源適配器 100V/240V 自適應交流電源供應器 其他 操作系統(tǒng) Windows Vista Home Premium 附帶軟件 驅(qū)動軟件 隨機附件 電源適配器、軟件光盤、說明書 其他性能 集成130萬像素攝像頭 其他特點 參數(shù)糾錯du家ACV亮屏炫彩技術(shù)，du家ACS智能散熱系統(tǒng)，du家ECO節(jié)能電源管理系統(tǒng) 展開
2009-11-05 07:22:16
503
3
- 幫忙翻譯一下，萬分感謝
- 說明一下860DSP是一個信號測量儀器的型號 Here is a good explanation of how the 860 in spectrum mode uses the different settings like dwell wide， narrow， and averaging to look at the spectrum data differently. 860 DSPI Spectrum Analyzer Set... 說明一下860DSP是一個信號測量儀器的型號 Here is a good explanation of how the 860 in spectrum mode uses the different settings like dwell wide， narrow， and averaging to look at the spectrum data differently. 860 DSPI Spectrum Analyzer Settings Explanation In the 860 DSPI there are 3 different and unique spectrum analyzer “Detectors”. These detectors may alter the view of a signals appearance， depending on which is selected. Each detector can show a different picture on the same signal because of the way the detector functions. An important selection to our spectrum analyzer is the amount of digital snap shots to be taken. This will be the amount of digital snapshots that is taken in the allocated bandwidth before showing a picture. With this said， the more sampling that is put into the spectrum analyzer the slower it will seem to update， but more opportunity to capture ingress and other interference that can happen inside a cable plant. Dwell Wide- Dwell Wide takes the largest snapshot out of the amount taken， then the 7.5 MHz spectrum is peak held as the 860 DSPI tunes across the selected frequencies in 250 kHz steps. Example: In Dwell Wide， with a 32 sampling rate set， this in turn means the 860 will dwell or sit on a portion of the spectrum defined above， take 32 snap shots， and then display the picture with the max amplitude before moving on to the next portion of bandwidth. Dwell Narrow- Dwell Narrow takes the largest snapshot out of the amount taken， then a 250 kHz spectrum slice is peak held as the 860 DSPI tunes across the selected frequencies in 250 kHz steps. The difference between Dwell Narrow and Dwell Wide is that Dwell Narrow only peak holds across a 250 kHz slice， where as Dwell wide peak holds the entire 7.5 MHz. Example: In Dwell Narrow， with a 32 sampling rate set， this in turn means the 860 will go to the first 7.5 MHz of the spectrum it will look at a 250 kHz slice of the 7.5 MHz and take its 32 samples. These 32 samples will be done in a peak hold fashion， then display the sample that contains the largest signal. Averaging: This detector when selected looks at a 7.5 MHz portion of the spectrum. When it tunes to the first 7.5 MHz portion of the spectrum， it takes into account how much sampling is selected， then takes it’s digital snapshots on the entire 7.5 MHz， averages those pictures together， then shows the final averaged picture. This detector is used for looking at large amounts of bandwidth. Example: In Averaging， with a 32 sampling rate set， this in turn means the 860 will go to the first 7.5 MHz of the spectrum， take it’s 32 digital snap shots， average those together， and show the average of the 32 snapshots. 展開
2010-12-10 08:46:08
551
2
- 哪個牌子的試驗機比較好？請大家推薦一下
2015-06-01 14:41:56
315
2
- 男性尿常規(guī)檢驗報告.請大家?guī)兔庾x分析一下~
- 細菌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 紅細胞計數(shù)RBC 結(jié)果：13.60 單位/ul 參考值0~15 白細胞計數(shù)WBC 結(jié)果11.80 ... 細菌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 紅細胞計數(shù)RBC 結(jié)果：13.60 單位/ul 參考值0~15 白細胞計數(shù)WBC 結(jié)果11.80 單位/ul 參考值0~18 上皮細胞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 小圓上皮細胞SRC 結(jié)果1.40 單位/ul 參考值0~3 酵母細胞YLC 結(jié)果0 單位/ul 參考值0~10 電導率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 尿白細胞檢查LEU 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
2012-10-28 05:04:53
646
1
- 大家能不能推薦一本關(guān)于多肽合成的書
2018-03-06 12:24:08
355
1
- 組織勻漿機，均質(zhì)器，高速組織搗碎機--有何不同，大家?guī)兔ν扑]一下！
- 做食品，剛成立的實驗室，標準上寫了這些儀器，不太了解，希望專家能給解釋一下，順便可以給推薦一下儀器型號。不勝感激??！
2010-07-19 01:36:15
694
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- 進口的液氮罐有哪些品牌，幫忙推薦一下？
2012-06-11 15:54:34
380
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- 帕薩特左前速度傳感器g47故障怎么解決，請大家?guī)兔σ幌?
2015-05-31 04:07:54
543
2
- 請幫忙翻譯一下，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
2012-11-13 20:08:52
530
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- 請大家?guī)兔φ乙豢罟P記本電腦
- 要求價格4000左右，配置要差不多的，至少能玩游戲上網(wǎng)順暢的。在線等。
2009-07-10 21:57:57
448
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- 想買一個燃氣壁掛采暖熱水爐，請大家推薦一下 謝謝。
2012-11-10 01:53:24
377
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- 想買數(shù)碼相機，請大家?guī)蛶兔ν扑]！
- 想買個數(shù)碼相機，女生用，性能好，功能好，外觀好，拍的照片好看，還有是拍夜景照要好看，（本人比較愛夜間出動，喜歡看燈火夜景，呵呵）；至于相機外觀，個人很喜歡索尼的，可是好像... 想買個數(shù)碼相機，女生用，性能好，功能好，外觀好，拍的照片好看，還有是拍夜景照要好看，（本人比較愛夜間出動，喜歡看燈火夜景，呵呵）；至于相機外觀，個人很喜歡索尼的，可是好像說性能還是佳能的好，所以想請各位數(shù)碼攝影界的大俠們不吝賜教，推薦一些你們覺得好的適合我的數(shù)碼相機，價格不限，謝謝各位?。?！ 補充一下：因為是女生用的，所以不想要太大大笨重，要小巧可愛點的，呵呵。對了，麻煩各位推薦時請說明具體牌子具體型號，謝謝了！ 展開
2009-03-05 07:02:25
589
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- 加速度傳感器都有哪些品牌，大家都用過哪些牌子的，推薦一個
2012-08-09 13:17:34
687
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- 幫忙推薦幾本關(guān)于數(shù)字圖像處理，機器視覺，MATLAB的書
- 我要幾本分別關(guān)于數(shù)字圖像處理 機器視覺 MATLAB 的書名 有作者 有出版時間 有出版社名稱。 Z好再給一本英文的關(guān)于機器視覺的。謝謝你們了~！！
2008-06-07 06:32:33
466
1
- 下傅里葉紅外光譜儀，請大家推薦一下哪個型號的比較
2018-12-09 03:55:59
351
0
- 做橋梁振動監(jiān)測，需要低頻，頻帶寬的傳感器，大家?guī)兔ν扑]一下，謝謝！
2012-11-23 12:20:18
406
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- 請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
2007-05-22 09:38:51
477
3
- 請高手幫忙翻譯一下 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
2018-11-22 17:49:22
330
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