急求翻譯 請(qǐng)幫忙翻譯一下這篇英文資料,急用!?。?!
-
Wells-BrookfieldCone/PlateRapidDeterminationOfAbsoluteViscosityIntroductionTheWells-BrookfieldCone/PlateViscometergivesresearchersasophisticatedinstrumentforroutinelydete... Wells-Brookfield Cone/Plate Rapid Determination Of Absolute Viscosity Introduction The Wells-Brookfield Cone/Plate Viscometer gives researchers a sophisticated instrument for routinely determining absolute viscosity of fluids in small sample volumes. Its cone and plate geometry provides the precision necessary for development of complete rheological data. Principle of Operation The Wells-Brookfield Cone/Plate Viscometer is a precise torque meter which is driven at discrete rotational speeds. The torque measuring system, which consists of a calibrated beryllium-copper spring connecting the drive mechanism to a rotating cone, senses the resistance to rotation caused by the presence of sample fluid between the cone and a stationary flat plate. The resistance to the rotation of the cone produces a torque that is proportional to the shear stress in the fluid. The amount of torque is indicated either on a dial or digital display, depending on model. This reading is easily converted to absolute centipoise units (mPa.s) from pre-calculated range charts. Alternatively, viscosity can be calculated from the known geometric constants of the cone, the rate of rotation, and the stress related torque. See Range Tables The correct relative position of cone and plate is obtained by following a simple mechanical procedure without the need for external gauges or supplementary instrumentation. The stationary plate forms the bottom of a sample cup which can be removed, filled with .5 ml to 2.0 ml of sample fluid (depending on cone in use), and remounted without disturbing the calibration. The sample cup is jacketed and has tube fittings for connection to a constant temperature circulating bath. The system is accurate to within ?.0% of the working range. Reproducibility is to within ?.2%. Working temperature range is from 0oC to 100oC. 展開
全部評(píng)論(0條)
登錄或新用戶注冊
- 微信登錄
- 密碼登錄
- 短信登錄
請(qǐng)用手機(jī)微信掃描下方二維碼
快速登錄或注冊新賬號(hào)
微信掃碼,手機(jī)電腦聯(lián)動(dòng)
熱門問答
- 急求翻譯 請(qǐng)幫忙翻譯一下這篇英文資料,急用?。。?!
- Wells-BrookfieldCone/PlateRapidDeterminationOfAbsoluteViscosityIntroductionTheWells-BrookfieldCone/PlateViscometergivesresearchersasophisticatedinstrumentforroutinelydete... Wells-Brookfield Cone/Plate Rapid Determination Of Absolute Viscosity Introduction The Wells-Brookfield Cone/Plate Viscometer gives researchers a sophisticated instrument for routinely determining absolute viscosity of fluids in small sample volumes. Its cone and plate geometry provides the precision necessary for development of complete rheological data. Principle of Operation The Wells-Brookfield Cone/Plate Viscometer is a precise torque meter which is driven at discrete rotational speeds. The torque measuring system, which consists of a calibrated beryllium-copper spring connecting the drive mechanism to a rotating cone, senses the resistance to rotation caused by the presence of sample fluid between the cone and a stationary flat plate. The resistance to the rotation of the cone produces a torque that is proportional to the shear stress in the fluid. The amount of torque is indicated either on a dial or digital display, depending on model. This reading is easily converted to absolute centipoise units (mPa.s) from pre-calculated range charts. Alternatively, viscosity can be calculated from the known geometric constants of the cone, the rate of rotation, and the stress related torque. See Range Tables The correct relative position of cone and plate is obtained by following a simple mechanical procedure without the need for external gauges or supplementary instrumentation. The stationary plate forms the bottom of a sample cup which can be removed, filled with .5 ml to 2.0 ml of sample fluid (depending on cone in use), and remounted without disturbing the calibration. The sample cup is jacketed and has tube fittings for connection to a constant temperature circulating bath. The system is accurate to within ?.0% of the working range. Reproducibility is to within ?.2%. Working temperature range is from 0oC to 100oC. 展開
- 跪求(急求)幫忙翻譯一下
- 無機(jī)前處理室主要開展食品樣品中無機(jī)檢測進(jìn)儀器前的預(yù)處理工作。通過向食品樣品中加入強(qiáng)氧化性酸,采用微波消解技術(shù)或電熱板加熱技術(shù)使被測無機(jī)組分從復(fù)雜的樣品中分離出來,除去對(duì)分... 無機(jī)前處理室主要開展食品樣品中無機(jī)檢測進(jìn)儀器前的預(yù)處理工作。通過向食品樣品中加入強(qiáng)氧化性酸,采用微波消解技術(shù)或電熱板加熱技術(shù)使被測無機(jī)組分從復(fù)雜的樣品中分離出來,除去對(duì)分析測定有干擾的基本物質(zhì),制成便于測定的溶液形式。樣品的預(yù)處理過程都是在無機(jī)前處理室進(jìn)行的。 主要儀器:ETHOS A微波消解儀、SD500電熱板、Mill-Q Advandage A10超純水儀等。 光譜室主要開展食品、飲用水等樣品中重金屬元素含量檢測工作,各類儀器針對(duì)不同的物質(zhì)進(jìn)行檢測有其各自的優(yōu)勢。原子吸收光譜儀耶拿ZEEnie-700系列儀器主要用于鉛、鎘、銅、鉻、錳、鋅、鐵、鈣、鎂、鉀、鈉等項(xiàng)目檢測,雙道原子熒光光度計(jì)吉天AFS-820a系列儀器主要用于砷、汞、錫等項(xiàng)目檢測。光譜分析技術(shù)已經(jīng)被廣泛應(yīng)用于食品和水質(zhì)檢測、環(huán)境保護(hù)、醫(yī)藥衛(wèi)生等領(lǐng)域。 主要儀器:原子吸收光譜儀耶拿ZEEnie-700系列、雙道原子熒光光度計(jì)AFS-820a系列。 承檢項(xiàng)目:食品、飲用水中重金屬鉛、鎘、銅、鉻、錳、鋅、鐵、鈣、鎂、鉀、鈉、砷、汞、錫等。 要英文的謝謝 展開
- 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
- 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
- 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
- 請(qǐng)專家?guī)兔Ψg一下,謝謝!
- 粒度檢測方法與優(yōu)缺點(diǎn)比較 粉末粒度分布的測量方法經(jīng)過百余年的發(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)在普遍使用的測量... 粒度檢測方法與優(yōu)缺點(diǎn)比較 粉末粒度分布的測量方法經(jīng)過百余年的發(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,下面簡單介紹幾種常用的粒度測量方法。 ▲ 篩分法 是一種具有很長歷史的粒度測定方法,篩分法粒度測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)是測量成本低廉,操作簡單,但存在著如重復(fù)性差,測量時(shí)間較長,不能對(duì)5um以下的顆粒進(jìn)行測量等缺點(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)行測量,分析的方法。這種方法不僅能夠測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試方法,這種特點(diǎn)也是其它粒度測量儀器所不具備。這種方法的優(yōu)點(diǎn)是直觀、簡便、費(fèi)用低,缺點(diǎn)是由于取樣量很少,為使測量結(jié)果代表性,必須增加待測顆粒的個(gè)數(shù)(一般認(rèn)為測量顆粒的個(gè)數(shù)應(yīng)在1000個(gè)以上),這就相應(yīng)嗇了測量時(shí)間,及測試人員的工作強(qiáng)度,但由于能夠?qū)︻w粒形貌(如長徑比等)進(jìn)行測量,目前也有廣泛應(yīng)用。 ▲光透沉降法 沉降法粒度測試的理論基礎(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,后者闡明光透過率與粒徑重量的關(guān)系??珊唵蔚拿枋鰹椋涸诔两狄褐校腥舾上嗤戎氐念w粒,如果同一時(shí)刻,從同一位置開始下降,則不同直徑的顆粒到達(dá)測量區(qū)的時(shí)間是不同的,根據(jù)顆粒到達(dá)測量區(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。采用此種原理的測量儀器有比較長的使用歷史,但隨著科技的發(fā)展和測量手段的進(jìn)步,此方法的缺點(diǎn)也日益突出,如測量時(shí)間長,重復(fù)性誤差大等。 ▲ 激光散射法 顆粒測量儀器是以富朗和菲衍射(Fraunhofer diffraction)和米氏散射(Mie scattering)為理論基礎(chǔ)。此理論可以簡單理解為沿直線傳播的平行激光束,在傳播過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限遠(yuǎn)處形成了一個(gè)愛里斑,愛里斑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。 ▲ 采用激光粒度測量儀器相對(duì)于光透沉降粒度測量儀器具有很多優(yōu)點(diǎn): 1. 原理先進(jìn),并且由于測試過程中沒有需要預(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),及在測量過程中隨時(shí)改變的條件, 因此測量結(jié)果準(zhǔn)確、可靠。 2. 測量速度快,測試時(shí)間與樣品粒度分布無關(guān),典型測試過程一般小于一分鐘; 3. 每次測試,多次對(duì)樣品進(jìn)行掃描,測試結(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
- 英文高手幫忙翻譯一下 壓力容器方面
- 公司接到一個(gè)壓力容器圖紙是英文版的想知道其中的一些意思,原文如下:一TECHNICALDATA:1.MAXIMUMALLOWABLEPRESSURE7.0BAR2.WORKINGPRESSURE5.5+/-1.0BAR3.TESTPRESSURE10.0BAR4.MAXI... 公司接到一個(gè)壓力容器圖紙 是英文版的 想知道其中的一些意思,原文如下: 一 TECHNICAL DATA: 1.MAXIMUM ALLOWABLE PRESSURE 7.0BAR 2.WORKING PRESSURE 5.5+/-1.0BAR 3.TEST PRESSURE 10.0BAR 4.MAXIMUM ALLOWABLE TEMPERATURE 70℃ 5.MINIMUM ALLOWABLE TEMPERATURE 0℃ 6.FLUID PREFILL(ISO VG46-HLP) 7.CORROSION ALLOWABLE 2mm 8.VOLUME 38.00L 二 TECHNICAL ACCEPTANCE: 1.CHINA DECLARATION OF CONFORMITY 2.CONFORITY ASSESSMENT PROCEDURE REPORTS 3.BILL OF MATERIALS 4.INSPECTION DOCUMENTS AND CERTIFICATES FOR USED MATERIALS 5.WELDING MAP 6.LIST OF WELDERS AND THEIR QUALIFICATION CERTIFICATES 7.NDE EXAMINATION REPORTS 8.VT AND MEASUREMENT REPORTS 9.PAINT: EXTERNAL:BLUE RAL 5015 SEMI-GLOSS FINISH INTERNAL:USE SUNCORITE 528 BY HENKEL METAL CHEMICALS TO TREAT INTERNAL SURFACE OF TANK 10.PAINT REPORT 11.TECHNICAL DOCUMENTATION AND OPERAING MANUAL 三 NOTES: 1.ALL DIMENSIONS ARE IN MILLIMETER UNLESS OTHERWISE NOTED. 2.GASKET CONTACK SURFACE OF ALL FLANGES SHALL BE FINISHED WITH 125-250 AARH. 3.INTERNAL WELD SURFACE OF INSTRUMENT NOZZLE TO BE FULLY FLUSHED. 4.PAINT INSIADE AND OUT PER OILGEAR STANDAR SOP-U-002. 5.TATAL WEIGHT OF UNIT ASSEMBLY IS 32,900LB[14,900kg]. 6.DIMENSIONS IN MM. 展開
- 求日語 日文翻譯幫忙翻譯一下。。。萬分感謝
- 請(qǐng)求項(xiàng)2記載の透明硬脆材料のレーザ加工裝置において、前記半透過ミラー及び前記反射ミラーにおける凹面のそれぞれの焦點(diǎn)位置が、同位置となるよう配置したことを特徴とするレーザ加工裝置。
- 請(qǐng)教英語高人,幫忙翻譯一下.急用,謝謝!??!
- 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. 請(qǐng)給一個(gè)比較能看懂的翻譯,謝謝. 展開
- 請(qǐng)翻譯一下這段英文1,謝謝
- Materials For the present study, the matrix was ABS supplied by Formosa Co. The reinforcements were polyacrylonitrile based high strength CFs. The properties of materials used were given in Table 1. Carbon fibre surface treatment Carbon fi... Materials For the present study, the matrix was ABS supplied by Formosa Co. The reinforcements were polyacrylonitrile based high strength CFs. The properties of materials used were given in Table 1. Carbon fibre surface treatment Carbon fibres were oxidised by boiling in HNO3 under reflux for 5 h (T5120uC). Afterwards, the nitric acid oxidised fibres were washed with distilled water to neutral pH. Fibre surface composition The fibres were characterised by X-ray photoelectron spectroscopy (ESCA 300, Scienta, Sweden) to determine the level of functionalisation of the modified fibres. An initial survey scan was performed to determine the detectable elements, followed by high resolution scans. The entire X-ray photoelectron spectrum was energy referenced to the C1s peak of graphite (bending energy5284?5 eV). Composite preparation Before processing, ABS pellets and CFs were dried in a vacuum oven for 4 h at 80uC. Composites containing 0, 5, 10, 15, 20, 25 and 30 wt-% SCF were prepared by melt mixing in a co-rotating twin screw extruder (Thermoprism TSE 16 TC, L/D:24). The ABS pellets and CFs were fed from the main and side feeders respectively. The molten composite obtained from the die of the extruder was water cooled and pelletised. The extrusion conditions were arranged, as shown in Table 2. The viscosity of the melt containing CFs depends on the viscosity of the polymer matrix as well as the processing temperature. To avoid unfavourable shearing conditions, the melt temperature is kept as high as possible regarding thermal degradation. Before PA6 was blended to promote interfacial adhesion, vacuum drying of the ABS and PA6 pellets was carried out at 80uC for 4 and 12 h respectively. The 0, 10, 20 and 30 wt-% PA6 containing batches were fed through the main feeder to the twin screw extruder. The extrudate was water cooled and chopped into small pellets. The produced ABS/PA6 pellets were vacuum dried again at 80uC for 12 h. To prepare the SCF reinforced ABS/PA6 composites, the blend was introduced into the twin screw extruder from the main feeder, and SCFs were fed from the side feeder. The twin screw extruder was operated at the same processing conditions used during the blend preparation. The extrudate was again water cooled and chopped into small pellets. The extrusion grades of resin were used to make the extrudate form fully. The specimens for the mechanical characterisation experiments were moulded using a laboratory scale injection moulding machine (microinjector, model 1998; Daca Instruments) at a barrel temperature of 230uC and mould temperature of 80uC. The injection moulding machine used in this study was a laboratory type microinjector. The principle of the operation is that the preweighed (,2?5 g) raw material is loaded into the cylindrical barrel and allowed to melt at a preset barrel temperature for 1 min.Then the molten plastic is pushed through an injection tip by a piston. 展開
- 高分請(qǐng)高手幫忙翻譯英文文獻(xiàn)資料(4)
- Whenliquidisheateditevaporates.Theevaporationprocessisdependentonpressure,temperatureandcompositionoftheliquidandgas.Gascanalsocondense.Inadditionthereisaconvectiveheattr... When liquid is heated it evaporates. The evaporation process is dependent on pressure, temperature and composition of the liquid and gas. Gas can also condense. In addition there is a convective heat transfer between the liquid and gas zone that must be considered. The surfaces in the gas zone also radiates from the shell to the liquid. During the blowdown process mass is usually evacuated from the gas zone, but also liquid might be released. The rate of release is dependent on density and pressure as well as the release area. As pressure and temperature change, the properties of all materials change. This has to be considered in a prediction of a blowdown process. The main purpose of a blowdown process is as earlier stated to maintain integrity of the equipment. The strength properties of the shell are the key factor on that matter. The strength is dependent on the inside pressure as well as the support forces. If the exposing forces produce stress that exceeds the ultimate tensile stress (UTS) in some regions, the integrity of the equipment is no longer maintained. In the design phase of a process plant, these aspects are crucial and must be included as a dimensional factor. For that reason prediction of the blowdown process is essential. Lately some new standards has been introduced to the industry on this matter [3] and [4]. VessFire [1] and [2] is a multi physics system designed for calculation of this kind of problems. It has been applied for some time in the oil and process industry on many projects. The system satisfies the requirements for predictions outlined in [3] and [4]. It includes all aspects described above including integrity of the shell. As part of the verification process some experiments where performed. Some of the experiments are presented here. EXPERIMENTAL STUDY The purpose of the experiments was to investigate the evaporation process and the heat transfer to the liquid and vapour. In a complex system it is important to reduce unknown parameters as far as possible. Exposure from a flame is difficult to control. Flux measurements are point values and not necessarily representative for the average exposure. In order to control the heat exposure it was decided to apply an electric heating system. The system and the verification of the system is described in [5], [6] and [8]. The furnace was built inside a supporting tube. Figure 2 shows a general arrangement of the experimental outfit. A 0.05 mm stainless steel foil formed as a tube, 300 mm in diameter, generated the heat. The power supply was based on a 3-phase alternating current system giving 48 Volt output as maximum. The top exposure had a limit of 300 kW. The foil had a surface of about 1 m2, giving a heat flux up to 300 kW/m2. The power input could be continuously regulated from zero to maximum load. Each experiment was started from zero and brought up to the required load within a few seconds. After that the surface temperature of the heating foil was kept constant during the exposure period. Experiments with both dry objects as well as water filled object were performed. In this paper only water filled experiments are presented Figure 2 General arrangements drawing of the experimental furnace including the specimen and its support Figure 3 Illustration of the heating unit. The black part is copper conductors for the foil. The grey part is the heating foil exposing the specimen. The foil is equipped with thermo-elements all marked H, except H5 which is the temperature in a copper ring and H6 which is the temperature between the insulation and the supporting tube. 展開
- 幫忙翻譯一下,謝謝
- IFRS13willhelpincreasetransparencywhenentitiesusemodelstomeasurefairvalue,particularlywhenusersneedmoreinformationaboutmeasurementuncertainty,suchaswhenthemarketforanasse... IFRS 13 will help increase transparency when entities use models to measure fair value, particularly when users need more information about measurement uncertainty, such as when the market for an asset or a liability has become less active. IFRS 13 requires entities to disclose information about the valuation techniques and inputs used to measure fair value, as well as information about the uncertainty inherent in fair value measurements (which was of particular concern during the global fi nancial crisis). Some of those disclosures, including the fair value hierarchy, were already introduced in March 2009 through an amendment to IFRS 7 Financial Instruments: Disclosures. Those disclosures have been relocated to IFRS 13. The requirements in IFRS 13 also incorporate the guidance in a FASB Staff Position (FSP) issued in April 2009. 展開
- 幫忙翻譯一下,求速度,考試中
- 題目是:aboutvirtualinstrumentation!內(nèi)容各位大神自己百度吧,手機(jī)不方便了。翻譯全文沒事,Z好附原文。原文diyi句是WITHmorethan6……應(yīng)該夠了哈,有道,谷歌翻譯的就成了,麻煩... 題目是:about virtual instrumentation!內(nèi)容各位大神自己百度吧,手機(jī)不方便了。翻譯全文沒事,Z好附原文。原文diyi句是WITH more than 6……應(yīng)該夠了哈,有道,谷歌翻譯的就成了,麻煩速度! 發(fā)這個(gè)郵箱吧,122524007@qq.com! 展開
- 翻譯翻譯,請(qǐng)高手幫我翻譯一下這個(gè)說明
- Followthesysteminstallationinstructionscarefullyandinthespecifiedorder.ThesoftwaremustbeinstalledonthecomputerbeforeconnectingtheUSBcable.2.1FacilitiesRequirementsFacilit... Follow the system installation instructions carefully and in the specified order. The software must be installed on the computer before connecting the USB cable. 2.1 Facilities Requirements Facilities requirements for the alpha-SE system are listed in Table 2-1 and the system dimensions are given in Fig. 2-1. As shown in Fig. 2-2, the alpha-SE tool requires a clear work area of 20 by 18 inches (500 by 460 mm), excluding the operator computer. 2.2 Unpacking the Hardware Opening the Shipping Container Move the alpha-SE shipping container to the area where the tool will be installed. Open the container and remove the top and side pieces of packing foam. Carefully remove all smaller components from the shipping container, verifying that you received all components, as shown in Fig. 2-3. Finally, remove the alpha-SE ellipsometer and position it on your clear 20” by 18” (510 by 460 mm) workspace. Caution: The alpha-SE ellipsometer without sample chuck weighs approximately 37 lbs. (16 kg.). Please find an assistant to lift the alpha-SE unit out of the shipping carton and on to clear work surface. 展開
- 求翻譯英文文獻(xiàn)
- 2.2. Material Characterizations. A field emission scanning electron microscope (SEM, JEOL 6701F) was used to investigate the morphologies, particle sizes of the samples. Transmission electron microscopy and elemental compositions of the ... 2.2. Material Characterizations. A field emission scanning electron microscope (SEM, JEOL 6701F) was used to investigate the morphologies, particle sizes of the samples. Transmission electron microscopy and elemental compositions of the samples were determined by JEM-2100F (JEOL) coupled with an energy-dispersive X-ray spectroscopy (EDX, Phoenix) system. Wide-angle and low-angle X-ray powder diffraction (XRD) of the as-obtained samples were recorded on a Rigaku D/max-2500 with Cu Kα radiation (λ = 1.540 56 ?) operated at 40 kV and 200 mA. Raman measurements were performed using a DXR from Thermo Scientific with a laser wavelength of 532 nm. To calculate the pore size distribution and pore volumes, the nitrogen absorption and desorption isotherms were measured at 77.3 K with an Autosorb-1 specific surface area analyzer from Quantachrome. The content of N in N-doped porous carbon was determined by NHC elemental analysis using Flash EA 1112. Thermogravimetric (TG) analysis of S/C composite was performed on TG/DTA 6300 in an N2 flow to obtain the S content in the composite. A four-contact method was applied to measure the powder electronic conductivity of porous carbons. The powder sample was pressed to disk at 4 MPa with two stainless-steel plungers, whose resistance was measured by a Keithley 2400 digital multimeter in fourwire mode. The conductivity of the sample was calculated according to the resistance and the size of the disk. Information of the surface elements was obtained by X-ray photoelectron spectroscopy (XPS) performed on the Thermo Scientific ESCALab 250Xi using 200 W monochromatic Al Kα radiation. The 500 μm X-ray spot was used for XPS analysis. The base pressure in the analysis chamber was about 3 × 10?10 mbar. All reported data of XPS binding energy are calibrated based on the hydrocarbon C 1s line at 284.8 eV from adventitious carbon. Spectra were fitted with Lorentzian?Gaussian functions and smart background using Thermo Avantage software. 展開
- 幫忙翻譯一下,萬分感謝
- 說明一下860DSP是一個(gè)信號(hào)測量儀器的型號(hào) 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(gè)信號(hào)測量儀器的型號(hào) 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
- 英語高手幫忙翻譯一下
- ThequalitysystemofthecompanyisinconformitywithISO9002.Makingcomprehensiveuseofbiotechnology,thecompanyspecializesinmanufacturingandsellingC-4seriesorganicacidsandchiralpr... The quality system of the company is in conformity with ISO 9002 . Making comprehensive use ofbiotechnology, the company specializes in manufacturing and selling C-4series organic acids and chiral products. These products are widely used in many fields such as food, phamaceutical and chemical industries, and are well accepted by the overseas markets. The man products are L-Malic acid , DL-Malic acid, L(+)-Tartaric acid , Fumaric acid, Maleic acid and other organic acids. Annual productivity amounts to 20,000 tones. The company has become an important manufacturer of C-4 series organic acids in the world . All the products of the company have respectively met the different international aadvanced standards such as Food chemicals Codex, U.S. Pharmacopoeia ,British Pharmacopoeia and the products have obtained Star-K Kosher certificate. Above 70% of the Companys products are exported to Japan, Europe, Australias, the United states and middle East , and they are renown and well recognized in the international markets. The company will devote itself to research and development of enzyme technology and organic electrochemistry. It will continuously introduce new food additives, chiral pharmaceutical intermediates, chiral auxiliaries and chiral drugs. Depending on superior quality, good service and high reputation, the company is willing to establish a long-term mutually beneficial business partnership with overseas customers and continue contribute to the happy life of humans. 展開
4月突出貢獻(xiàn)榜
推薦主頁
最新話題





參與評(píng)論
登錄后參與評(píng)論