請翻譯一下這段英文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
全部評論(1條)
-
- whl初心未變 2011-04-24 00:00:00
- 材料 對目前的研究中，基體ABS提供公司。福爾摩沙時，基于援兵被聚丙烯腈的高強度CFs。其所使用材料性質(zhì)是表1規(guī)定的數(shù)值。碳纖維的表面處理的碳纖維制成的硝酸氧化沸騰了下5 h(T5120uC返流)。后來，硝酸氧化纖維用水清洗蒸餾水來中性。纖維表面組成的纖維都懷著x射線光電子能譜(光電子能譜300，科學(xué)瑞典)functionalisation水平確定改性后的纖維。初步調(diào)查確定掃描檢測進行了元素，其次是高分辨率的掃描。整個x射線電子能譜的能量譜峰的參考C1s彎曲energy5284石墨(eV)? 5。加工、ABS復(fù)合前的準(zhǔn)備工作都干0.05%，CFs在真空爐在80uC 4小時。復(fù)合材料是一種含有0，5、10、15、20、25 - 30硅油制備- %超臨界技術(shù)co-rotat熔體混合了
-
贊(7)
回復(fù)(0)
熱門問答
- 請翻譯一下這段英文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
2011-04-23 21:43:45
425
1
- 誰能幫我翻譯一下這段英文文獻啊
- Fig. 1 shows that diamond particles are dispersed in the copper matrix. Since the diamond particles are easy to be stripped off during mechanical polishing， small pits are left on the surface of samples. When the samples were analyzed b... Fig. 1 shows that diamond particles are dispersed in the copper matrix. Since the diamond particles are easy to be stripped off during mechanical polishing， small pits are left on the surface of samples. When the samples were analyzed by electron probe for carbon， the particles displayed high carbon peaks， as shown in Fig. 2. Fig. 3 exhibits the analyzed result for extracted product of the copper–diamond composite by X-ray diffraction (XRD) analysis. It is shown that three dif- fraction peaks exist， shown as A， B and C， respectively. The interplanar distances corresponding to the three peaks and standard ones for diamond are compared in Table 1. The measured values of the interplanar distances are in good agreement with the standard ones， demon- strating that the extracted product should be the carbon in diamond state. Fig. 4(a) gives a TEM micrograph showing distribution and morphology of diamond particles (indicated as A， B， and C) in the copper–diamond composite. The calibration of interplanar distance for diffraction rings in Fig. 4(b) was given in Table 2. Compared to Table 1， it is also demon- strated that the calibrated interplanar distances for the diffraction rings conform to the standard ones of diamond. Therefore， it is believed that the graphitization of diamond particles hardly occurs after sintering at 1150–1220 K in the copper–diamond composite. Although diamond is a metastable allotropic modifica- tion of carbon， the graphitization of diamond particles in the copper–diamond composite did not occur， or the degree of graphitization was too small to be found. It is believed that the beginning temperature of graphi- tization would be associated with the purity of diamond powders. The impurities such as some metallic elements reduce the beginning temperature of diamond graphitiza- tion. When diamond is fabricated by the static synthesis method， Fe and Ni are often used as catalysts and are present in diamond as impurities to decrease the beginning temperature of graphitization [6]. It is understandable that both for the graphitization and its reverse reactions， their activation energies can be decreased by catalytic agents. Compared with the diamond fabricated by static synthesis， the diamond powders prepared by explosion method do not contain metallic impurities， thus leading to an obvious increase in the beginning temperature of graphitization. Hence， the detonation synthetic diamond might be more resistant to graphitization and probably suitable for the electric contact materials. 展開
2011-03-22 08:43:56
449
2
- 請專家?guī)兔Ψg一下，謝謝！
- 粒度檢測方法與優(yōu)缺點比較 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和發(fā)展（如激光散射法、動態(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和發(fā)展（如激光散射法、動態(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)篩將粉末進行篩分，然后對每個篩上樣品分別進行稱重，進而得到以質(zhì)量為量綱的粒度分布數(shù)據(jù)，并可由分布結(jié)果計算出如Dv50等其它參數(shù)。篩分滶要特點是測量成本低廉，操作簡單，但存在著如重復(fù)性差，測量時間較長，不能對5um以下的顆粒進行測量等缺點。 ▲顯微圖像分析法 利用光學(xué)或電子顯微鏡及計算機圖像識別技術(shù)對顆粒粒度及粒度分布，顆粒形貌進行測量，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，這種特點也是其它粒度測量儀器所不具備。這種方法的優(yōu)點是直觀、簡便、費用低，缺點是由于取樣量很少，為使測量結(jié)果代表性，必須增加待測顆粒的個數(shù)（一般認為測量顆粒的個數(shù)應(yīng)在1000個以上），這就相應(yīng)嗇了測量時間，及測試人員的工作強度，但由于能夠?qū)︻w粒形貌（如長徑比等）進行測量，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，如果同一時刻，從同一位置開始下降，則不同直徑的顆粒到達測量區(qū)的時間是不同的，根據(jù)顆粒到達測量區(qū)的時間，及光強的強弱，就可以計算出顆粒的粒徑，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)展和測量手段的進步，此方法的缺點也日益突出，如測量時間長，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。（實際上是由于顆粒的遮擋在無限遠處形成了一個愛里斑，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， 對于相應(yīng)的的角度，其光能是對應(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弱也就反應(yīng)了對應(yīng)直徑顆粒在整個顆粒集合中占有的比例。 ▲ 采用激光粒度測量儀器相對于光透沉降粒度測量儀器具有很多優(yōu)點： 1. 原理先進，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，多次對樣品進行掃描，測試結(jié)果重復(fù)性好； 4. 進樣方式種類多，可適用于各種類樣品。 展開
2016-03-07 05:37:01
674
1
- 急求翻譯 請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
2018-11-17 09:10:28
461
0
- 誰能翻譯這段英文，化學(xué)專業(yè)方面的，很難
- This work examines the behaviour of fluorine modified b-PbO2 electrodes in the processes of O2 and O3 evolution in sulphuric acid. The electrochemical kinetic analyses of these processes are based on quasi-steady-state polarisation and impe... This work examines the behaviour of fluorine modified b-PbO2 electrodes in the processes of O2 and O3 evolution in sulphuric acid. The electrochemical kinetic analyses of these processes are based on quasi-steady-state polarisation and impedance data. The good agreement between the two sets of measurements allows some basic conclusions to be drawn. In particular， the O2 evolution process is always inhibited at F-doped PbO2 electrodes， and impedance results suggest possible changes in the mechanism， with electrodesorption of intermediates becoming more important as the concentration of the doping element increases. The interpretation of the data for the less positive potentials region invokes the specific adsorption of SO4 as a factor influencing the kinetics of O2 evolution. The current efficiency for O3 formation as a function of the amount of NaF added to the PbO2 growth solution reaches a maximum for a concentration of 0.01 mol dm 3. A plausible cause for the decrease on the higher concentration side is the discharge of adsorbed SO4 2 (or HSO4 ) eventually yielding persulphate. This reaction is known to be favoured in the presence of a relatively high amount of fluoride in the electrolyte. An analysis of the results of modified neglect of diatomic differential overlap (MNDO) calculations on Pb cluster models and of X-ray photoelectron spectroscopy (XPS) data suggests that the coverage by weakly adsorbed oxygen species (OH and H2O) is an important parameter that is influenced by F-doping. ? 1999 Elsevier Science Ltd. All rights reserved. 展開
2009-02-21 00:33:53
466
6
- 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
2012-04-29 01:58:49
511
6
- 這段韓語怎么翻譯
2016-04-07 18:05:24
499
1
- 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
1
- 翻譯翻譯，請高手幫我翻譯一下這個說明
- 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
2008-06-22 06:30:36
888
4
- 請問“磁療”英文怎樣翻譯？謝謝
2006-05-16 10:10:16
651
3
- 誰幫我翻譯一下，謝謝
- ···until TLC analysis indicated the absence of dipolarophile.
2008-10-25 07:34:06
441
2
- 英文高手幫忙翻譯一下 壓力容器方面
- 公司接到一個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
2010-07-15 11:42:12
1129
6
- 請高手幫我翻譯一下這一段。。。
- Carbonnanomaterialsarenovelmanufacturedmaterials，havingwidespreadpotentialapplications.Adsorptionofhydrophobicorganiccompounds(HOCs)bycarbonnanomaterialsmayenhancetheirto... Carbon nanomaterials are novel manufactured materials， having widespread potential applications. Adsorption of hydrophobic organic compounds (HOCs) by carbon nanomaterials may enhance their toxicity and affect the fate， transformation， and transport of HOCs in the environment. In this research， adsorption of naphthalene， phenanthrene， and pyrene onto six carbon nanomaterials， including fullerenes， single-walled carbon nanotubes ， and multiwalled carbon nanotubes was investigated， which is the first systematic study on polycyclic aromatic hydrocarbons (PAHs) sorption by various carbon nanomaterials. All adsorption isotherms were nonlinear and were fitted well by the Polanyi-Manes model (PMM). Through both isotherm modeling and constructing “characteristic curve”， Polanyi theory was useful to describe the adsorption process of PAHs by the carbon nanomaterials. The three fitted parameters (Q0， a， and b) of PMM depended on both PAH properties and the nature of carbon nanomaterials. For different PAHs， adsorption seems to relate with their molecular size， i.e.， the larger the molecular size， the lower the adsorbed volume capacity (Q0)， but higher a and b values. For different carbon nanomaterials， adsorption seems to relate with their surface area， micropore volume， and the volume ratios of mesopore to micropore. Quantitative relationships between these sorbent properties and the estimated parameters of PMM were obtained. These relationships may represent a first fundamental step toward establishing empirical equations for quantitative prediction of PAH adsorption by carbon nanomaterials and possibly other forms of carbonaceous (geo-) sorbents， and for evaluating their environmental impact. In addition， high adsorption capacity of PAHs by carbon nanotubes may add to their high environmental risks once released to the environment， and result in potential alteration of PAHs fate and bioavailability in the environment. 展開
2010-01-13 13:35:43
370
1
- 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
328
0
- 英語高手幫忙翻譯段英文 謝謝?。?
- In this paper， the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation， the doped TiO2 nanocatalysts demonstrated ... In this paper， the degradation of an azo dye Orange G (OG) on nitrogen-doped TiO2 photocatalysts has been investigated under visible light and sunlight irradiation. Under visible light irradiation， the doped TiO2 nanocatalysts demonstrated higher activity than the commercial Dugussa P25 TiO2， allowing more ef?cient utilization of solar light， while under sunlight， P25 showed higher photocatalytic activity. According to the X-ray diffraction (XRD)， X-ray photoelectron spectroscopy (XPS) and UV–vis spectra analyses， it was found that both the nanosized anatase structure and the appearance of new absorption band in the visible region caused by nitrogen doping were responsible for the signi?cant enhancement of OG degradation under visible light. In addition， the photosensitized oxidation mechanism originated from OG itself was also considered contributing to the higher visible-light-induced degradation ef?ciency. The effect of the initial pH of the solution and the dosage of hydrogen peroxide under different light sources was also investigated. Under visible light and sunlight， the optimal solution pH was both 2.0， while the optimal dosage of H2O2 was 5.0 and 15.0 mmol/l， respectively. Azodyes， which are characterized by the presence of one or more azo bonds ( N N )， are among the most notorious widespread environmental pollutants associated with textile，cosmetic， food colorants， printing， and pharmaceutical indus-tries. Because of their non-degradability， toxicity， potential mutagenicity and carcinogenicity， wastewaters originating from these dyes production or application industries pose a major threat to the surrounding ecosystems and human beings’ health.[1–3].Environmental concerns and the need of meeting the strin-gent international standards for rejecting wastewaters has made the development of novel and cost-effective processes for the puri?cation of azo dyes ef?uents an issue of major technological importance. 展開
2011-05-06 19:00:45
584
2
- 能幫我翻譯一下嗎？謝謝
- 能不能幫我翻譯一下這幾句話?。? （1）HeterOgeneous Green Catalyst for Oxidation of Cyclohexene and Cyclooctene with Hydrogen Peroxide in the Presence of Host(Nanocavity of Y—zeolite)／Guest(N4一Cu(II) Schif Base Complex)Nanocomposite... 能不能幫我翻譯一下這幾句話??？ （1）HeterOgeneous Green Catalyst for Oxidation of Cyclohexene and Cyclooctene with Hydrogen Peroxide in the Presence of Host(Nanocavity of Y—zeolite)／Guest(N4一Cu(II) Schif Base Complex)Nanocomposite Material （2）Department of Chemistry，F(xiàn)aculty of Science，Alzahra University Vanak，Tehran，P.O ．1993891176，Iran (3)Department of Chemistry，K．N Toosi University of Technology， Tehran P O．Box 16315-1618．Iran （4）Incorporation of copper(II)in NaY(metal exchanged Y-zeolite 謝謝啦！ 展開
2012-11-21 13:35:40
416
3
- 高分請高手幫忙翻譯英文文獻資料（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
2009-03-12 04:13:30
539
6
- 請好人幫我翻譯一下，是關(guān)于空氣采樣計劃的。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. 展開
2012-08-23 08:22:26
516
1
4月突出貢獻榜
推薦主頁
最新話題
滬公網(wǎng)安備 31011502008050號
參與評論
登錄后參與評論