求英語翻譯一句話 關于超聲波傳感器的 謝謝
紫荊花8002-
The radial resolution of multiple echoes ( Rres ) means the resolution of detection distance by calculating minimum interval time of between the 1st echo and the 2nd echo ( Tres ). 主要告訴我 radial resolution 是什么意思啊 謝謝
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- 求英語翻譯一句話 關于超聲波傳感器的 謝謝
- The radial resolution of multiple echoes ( Rres ) means the resolution of detection distance by calculating minimum interval time of between the 1st echo and the 2nd echo ( Tres ). 主要告訴我 radial resolution 是什么意思啊 謝謝
2012-03-03 12:19:15
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- 急求一篇關于超聲波傳感器的畢業(yè)論文
- 求一篇關于超聲波傳感器的畢業(yè)論文 論文內(nèi)容不要是它的發(fā)展前景或廣泛應用 Z好細致到某一樣用途 例如利用單片機的超聲波測液位 不用寫的太細致幾千字的 寫個細致的提綱就行或?qū)憘€大概需要找資料寫個名字我自己找 懸賞分數(shù)雖不高 但能幫我搞定這個難題 全部分... 求一篇關于超聲波傳感器的畢業(yè)論文 論文內(nèi)容不要是它的發(fā)展前景或廣泛應用 Z好細致到某一樣用途 例如利用單片機的超聲波測液位 不用寫的太細致幾千字的 寫個細致的提綱就行或?qū)憘€大概需要找資料寫個名字我自己找 懸賞分數(shù)雖不高 但能幫我搞定這個難題 全部分數(shù)300奉上 急求 謝謝 展開
2010-03-25 18:53:53
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- 關于超聲波傳感器的問題
- 您好，請問收發(fā)一體式超聲波傳感器分開用，一個做發(fā)射一個做接收，探頭標稱反射距離可以做到5米，做對射的話可以做到10米嗎？還有一般的發(fā)射電路用什么做升壓比較好，輸入5V電壓。非常感謝
2013-04-15 06:11:02
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- 求低功耗超聲波傳感器~
- 請大家?guī)臀医榻B一款低功耗超聲波傳感器~ 參數(shù)： Z大測量距量10米 功耗越低越好，供電電流Z好低于2毫安 如找到，重謝~
2010-07-19 08:44:01
462
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- 化學專業(yè)英語翻譯 懂的翻譯下 謝謝
- The X-ray diffraction (XRD) pattern was obtained on a Thermo ARL XTRA X-ray diffractometer with Cu K radiation ì 1.54178 ?). In situ XRD characterization was performed n a high-temperature attachment of the X-ray diffractometer. ... The X-ray diffraction (XRD) pattern was obtained on a Thermo ARL XTRA X-ray diffractometer with Cu K radiation ì 1.54178 ?). In situ XRD characterization was performed n a high-temperature attachment of the X-ray diffractometer. Transmission electron microscopy (TEM) observation was performed with a JEOL JEM 2010 high-resolution transmission electron microscope (HRTEM) operated at 200 kV. The UV vis diffuse reflectance spectrum (DRS) was obtained from a Perkin-Elmer Lambda 900 UV vis spectroscopy machine. The precursor was characterized by Fourier transform infrared (FT- R) spectroscopy on a Perkin-Elmer Spectrum One FT-IR machine by using the KBr pellets method. 展開
2010-03-07 19:15:29
632
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- 幫忙翻譯一句話
- Catalysts were prepared by pore volume impregnation of ?-alumina
2008-05-28 15:55:47
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- 英語翻譯，謝謝，我急呀，好人一生平安?。?
- Guthrie，Young，Blankenagel，andCooley1ABSTRACTInordertoavoidearly-agedamagetocement-treatedbase(CTB)materials，thecementmustbeallowedtocureforaperiodoftimebeforethepavementc... Guthrie， Young， Blankenagel， and Cooley 1 ABSTRACT In order to avoid early-age damage to cement-treated base (CTB) materials， the cement must be allowed to cure for a period of time before the pavement can be opened to traffic. The purpose of this research was to evaluate the utility of the soil stiffness gauge (SSG)， heavy Clegg impact soil tester (CIST)， dynamic cone penetrometer， and falling-weight deflectometer for assessing early-age strength gain of cement-stabilized materials. Experimentation was performed at four sites on a pavement reconstruction project along Interstate 84 in Morgan， Utah， in which cement stabilization was used in conjunction with full-depth recycling. Each site was stationed to facilitate repeat measurements at the same locations with different devices and at different curing times. Because of the considerable attention they have received in the pavement construction industry for routine quality control and quality assurance programs， the SSG and CIST were the primary focus of the research. Statistical techniques were utilized to evaluate the repeatability of these devices and their sensitivity to curing time. The results indicated that while the SSG was more repeatable at one site， the CIST data were markedly more sensitive to curing time than the SSG data at all of the cement-treated sites during the first 60 hours after construction. For this reason， the data suggest that the CIST offers greater overall utility than the SSG for monitoring early-age strength gain of CTB. Further research is needed to investigate appropriate thresholds and protocols for these testing methods that ensure adequate reliability of the collected data. Key Words: Cement Stabilization， Clegg Impact Soil Tester， Dynamic Cone Penetrometer， Early Trafficking， Falling-Weight Deflecometer， Soil Stiffness Gauge TRB 2005 Annual Meeting CD-ROM 展開
2008-02-28 03:21:12
605
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- 英語翻譯，很專業(yè)的生物英語，翻譯器的不要，謝謝
- Results:Membranefractionsfromthree-dayand200mMsalt-treatedArabidopsissuspensionplantswereisolated，followedbyproteaseshavingandenrichmentusingZirconiumion-chargedmagneticb... Results: Membrane fractions from three-day and 200 mM salt-treated Arabidopsis suspension plants were isolated， followed by protease shaving and enrichment using Zirconium ion-charged magnetic beads， and tandem mass spectrometry analyses. From this isolation， 18 phosphorylation sites from 15 Arabidopsis proteins were identified. A unique phosphorylation site in 14-3-3- interacting protein AHA1 was predominately identified in 200 mM salt-treated plants. We also identified some phosphorylation sites in aquaporins. A doubly phosphorylated peptide of PIP2;1 as well as a phosphopeptide containing a single phosphorylation site (Ser-283) and a phosphopeptide containing another site (Ser-286) of aquaporin PIP2;4 were identified respectively. These two sites appeared to be novel of which were not reported before. In addition， quantitative analyses of protein phosphorylation with either label-free or stable-isotope labeling were also employed in this study. The results indicated that level of phosphopeptides on five membrane proteins such as AHA1， STP1， Patellin-2， probable inactive receptor kinase (At3g02880)， and probable purine permease 18 showed at least two-fold increase in comparison to control in response to 200 mM salt-stress. 展開
2011-06-07 04:07:51
589
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- 英語翻譯
- UNIPHOS-400 multiparameter UV/IR based Fire Detector detects fire by detecting simultaneously three important characteristics of fire viz. UV radiation in the solar blind region of 185-260 nm， IR emission from the hot CO2 which invariab... UNIPHOS-400 multiparameter UV/IR based Fire Detector detects fire by detecting simultaneously three important characteristics of fire viz. UV radiation in the solar blind region of 185-260 nm， IR emission from the hot CO2 which invariably is present in and around a fire and the continuum black body IR radiation from the fire. This microprocessor based detector is housed in a flameproof enclosure with a viewing window. It is mounted on a wall mountable stand with provision to adjust the field of view to bring the viewing window in line of sight of the likely spot where fire can occur. The detector gives a fire alarm (red led glows) when all the three chosen fire parameters are detected. Simultaneously a relay output is available. When any one of IR or UV radiation is detected yellow led glows to give a warn alarm and also a relay output is available. The detector also provides an analog 4-20mA output and a RS485 digital output to indicate the above events. 展開
2015-08-16 09:24:04
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- 英語翻譯
- Forexample，intest，measurement，andcontrol，engineershaveusedvirtualinstrumentationtodownsizeautomatedtestequipment(ATE)whileexperiencinguptoa10timesincreaseinproductivityga... For example， in test， measurement， and control， engineers have used virtual instrumentation to downsize automated test equipment (ATE) while experiencing up to a 10 times increase in productivity gains at a fraction of the cost of traditional instrument solutions. Last year 25，000 companies in 90 countries invested in more than 6 million virtual instrumentation channels from National Instruments. 會的人幫忙翻譯一下，我翻譯的不通順，沒有中文的感覺。請高手幫助！菜鳥級別繞道。 展開
2013-02-17 07:55:07
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- 高分求 光學薄膜 物理 專業(yè)英語翻譯 有追加
- 翻譯 論文摘要 給出了部分關鍵詞 希望對你您有所幫助 也希望您對我有所幫助 呵呵 部分關鍵字： 帶通濾光片 近紅外 膜系設計 短波通 ZX波長 透射率 key words :pass-band optical filter； near infrared; film system design;short wave pass；centr... 翻譯 論文摘要 給出了部分關鍵詞 希望對你您有所幫助 也希望您對我有所幫助 呵呵 部分關鍵字： 帶通濾光片 近紅外 膜系設計 短波通 ZX波長 透射率 key words :pass-band optical filter； near infrared; film system design;short wave pass；central wavelength ；transmittance 翻譯正文如下： 摘要：隨著礦難的頻頻發(fā)生，瓦斯探測器的靈敏度越來越受到人們重視。 本文中的紅外吸收型甲烷檢測儀便具有選擇性強，靈敏度高等優(yōu)點。其中近紅外濾光片為該裝置的核心部件。 本文介紹了利用特征矩陣法進行薄膜設計的制作方法。 采用Si和SiO2作為薄膜材料，利用ZX波長不同的長波通和短波通濾光片對接，以完成近紅外波段的帶通濾光片設計。 該濾光片ZX波長為1651nm，并在該波長附近的透射率可達到95%。 能翻多少翻多少 一句也行呀 呵呵 google的就免了，翻得好有追加，人格擔保~~ 展開
2010-06-02 04:05:57
599
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- 關于DNA提取的重新處理 謝謝！
- 具體的情況是：我用CTAB法提取DNA 在用異丙醇沉淀過夜后，然后離心，發(fā)現(xiàn)有個管子的離心產(chǎn)物（DNA）雜質(zhì)非常的多，請問如何進一步處理，使得雜質(zhì)減少？謝謝！主要是想問如何處理后，在加入苯酚氯仿異戊醇。。謝謝。。
2010-09-26 03:17:49
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- 英語翻譯求助
- The scheduler function involves planning how to produce the current volume of orders in the FMS， considering the current status of machine tools， work-in-process， tooling， fixtures， and so on. [91 The scheduling can be done automatically or... The scheduler function involves planning how to produce the current volume of orders in the FMS， considering the current status of machine tools， work-in-process， tooling， fixtures， and so on. [91 The scheduling can be done automatically or can be assisted by an operator. Most FMS control systems combine automatic and manual scheduling; the system generates an initial schedule that can be changed manually by the operator. The dispatcher function involves carrying out the schedule and coordinating the activities on the shop floor， that is， deciding when and where to transport a pallet， when to start a process on a machining center， and so on. The monitor function is concerned with monitoring work progress， machine status， alarm messages， and so on， and providing input to the scheduler and dispatcher as well as generating various production reports and alarm messages. A transport control module manages the transportation of parts and palettes within the system. Having an AGV system with multiple vehicles， the routing control logic can become rather sophisticated and become a critical part of the FMS control software. A load/unload module with a terminal at the loading area shows the operators which parts to introduce to the system and enables him or her to update the status of the control system when parts are3. Materials Handling System The automated materials handling system is a fundamental component that helps mold a group of independent CNC machines into a comprehensive FMS. The system must be capable of accepting workpieces mounted on pallets and moving them from workstation to workstation as needed. It must also be able to place workpieces on hold as they wait to be processed at a given workstation. The materials handling system must be able to unload a workpiece at one station and load another for transport to the next station. It must accommodate computer control and be completely compatible with other components in the flexible manufacturing system. Finally， the materials handling system for an FMS must be able to withstand the rigors of a shop environment. Some FMSes are configured with automated guided vehicles (AGVs) as a principal means of materials handling. 展開
2009-03-31 17:58:44
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- 跪求英語翻譯。
- Experiment SiO2 films with a thickness of 300 nm were grown on (100) p-Si substrates， with a resistivity of 4 W cm， using thermal oxidation at 1，000 C， for 90 min. Monte Carlo simulationcode (TRIM) was used to calculate the adequate ene... Experiment SiO2 films with a thickness of 300 nm were grown on (100) p-Si substrates， with a resistivity of 4 W cm， using thermal oxidation at 1，000 C， for 90 min. Monte Carlo simulationcode (TRIM) was used to calculate the adequate energy in order to place the maximum Ge concentration at the middle of the SiO2 film. SiO2 matrices were implanted with Ge74+ ions at RT， with 250 keV energy， using implantation doses of [0.5， 0.8， 1， 2， 3 and 4] · 1016 cm–2. After ion implantation， the samples were annealed at 1，000 C for 1 h in a forming gas atmosphere to precipitate Ge and to form the nanocrystallites. Raman spectra were obtained using a triple grating T- 64000 Jobin-Yvon spectrometer， with 1 cm–1 spectral resolution. The 514 nm line of the argon laser was used to excite the samples. All samples were measured at RT; the laser power on the sample was 9 mW. The diameter of the laser spot was 50 lm and the integration time was 30 min. The resonant Raman spectra were obtained in the backscattering configuration. The orientation of the Si substrate is fundamental to polarize the laser light， allowing the second-order Raman Si peak， at about 300 cm–1， to be suppressed not masking the Raman peaks corresponding to Ge-nc. PL spectra were measured at RT with a 240 nm excitation source， using a Spex Fluoromax spectrometer with a R298 Hamamatsu photomultiplier. Compositional analysis of the SiO2 matrix was carried out using a DIGILAB infra-red Fourier transform spectrometer. The system was purged with dry N2 to reduce the infrared (IR) absorption from H2O and CO2. Transmittance measurements were carried out within the 400– 4，000 cm–1 range at 300 K. The beam spot size was about 5 mm diameter and the resolution was 4 cm–1. In all cases a non-processed Si substrate sample was used as a reference. Results and discussions Figure 1 presents the Raman spectra of the films implanted with various doses [0.5; 0.8; 1; 2; 3; 4] · 1016 cm–2， followed by annealing forming-gas， (92% N2 + 8% H2) at 1，000 C， for 1 h. The position of the peak for bulk Ge was determined at 302.4 cm–1 and this value is used to compare with Ge-nc peaks. The Raman spectra of the implanted samples clearly show three bands: 210–280， 304 and 430 cm–1. The first one， 210–280 cm–1， is associated with amorphous Ge compounds. Such band was expected as the samples have been annealed at 1，000 C， therefore above the Ge melting temperature (938.3 C) [10]. At this temperature， Ge precipitates as liquid droplets inside a viscous oxide matrix. The second band was near 304 cm–1， and can be associated with Ge-nc. This band is in good agreement with the work reported by Wu et al. [11]. Finally， the third band at 430 cm–1 is related to local Si–Si vibrations [12]. 展開
2018-12-06 19:16:01
390
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- 科技英語翻譯
- 哪位高手幫忙翻譯一下，非常感謝?。?！ Casted titanium for dental crowns has been investigated by means of X-ray Photoelectron Spectroscopy (XPS)， X-Ray Di?raction (XRD) and Scanning Electron Microscopy (SEM). The samples were prepare... 哪位高手幫忙翻譯一下，非常感謝！?。?Casted titanium for dental crowns has been investigated by means of X-ray Photoelectron Spectroscopy (XPS)， X-Ray Di?raction (XRD) and Scanning Electron Microscopy (SEM). The samples were prepared according to the Ohara process. XRD analysis revealed that the investment consisted essentially of SiO2， Mg2P2O7， SiO2?H2O and Mg2SiO4. SEM experiments combined with EDX analysis revealed the following atomic concentrations Si (62.6%)， Mg (19.7%)， P (17.1%)， and Ca (0.6%). After casting， the titanium samples exhibit a rough and irregular surface， and XRD analysis indicated that titanium contains essentially the α phase and traces of the β phase. After demoulding titanium samples， the investment side which was in contact with titanium was black colored， proving the reaction between titanium and the investment. XPS analysis performed on this side of the investment indicated that the Si 2p peak presents a shoulder on the low binding energy side and thus suggest that SiO2 has been transformed into metallic Si. 展開
2018-11-19 21:52:36
362
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- 英語翻譯(2)
- Keywords:Epoxides;Amines;2-Aminoalcohols;Yttriumnitratehexahydrate;RegioselectivityAminoalcoholsconstituteanimportantclassofcompoundshavingbothchemicalandbiologicalapplic... Keywords: Epoxides; Amines; 2-Amino alcohols; Yttrium nitrate hexahydrate; Regioselectivity Amino alcohols constitute an important class of compoundshaving both chemical and biological applications. They are important pharmacophores present in various inhibitors and are used as building blocks for the synthesis of biologically active natural products， insecticidal agents and chiral auxillaries for asymmetric reactions.1a–f They act as starting materials for the synthesis of oxazolines which are useful in the polymer industry.1g Owing to their widespread applications， the synthesis of amino alcohols has received much attention in recent years. Traditionally， 2-amino alcohols are prepared by heating an epoxide with an excess of amine at elevated temperature. The use of a high temperature leads to undesired side reactions and also limits the applicability towards temperature sensitive substrates. To overcome these drawbacks various promoters such as ZnCl2，2 ScOTf，3 MgBr2OEt2，4 67 9 bismuth salts，5 CoCl2， CuBF4， DIPAT，8 Ti(OiPr)4， 1011 12TaCl5， ZrCl4， Sm(OTf)3， potassium dodecatungstocobaltate， 13 and aluminosilicate14 have been employed for the above transformation. The use of non-conventional techniques such as microwave irradiation at elevated temperaturehas also been reported.15 Recently， the use of Al(OTf)3 (1 mol %) as catalyst in toluene at reflux has also been reported.16 Although significant advances have been made in this area， low regioselectivity， longer reaction time， use of elevated temperature， high catalyst loading， toxic solvents and lower substrate compatibilitylimit their applications.Thus there is a need to develop an efficient catalytic protocol for ring opening of various epoxides with aliphatic， aromatic andheteroaromatic amines under ambient conditions 展開
2008-05-21 01:00:39
366
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- 藥學英語翻譯
- Havingbrieflyexaminedthestructureoforganicpackingsandthevariousroutesintheirmanufacture，themostimportantfeaturesmaybesummarizedasfollows:>Hydrophilicaswellaslipophilicorg... Having briefly examined the structure of organic packings and the various routes in their manufacture， the most important features may be summarized as follows: > Hydrophilic as well as lipophilic organic packings are synthesized with a controlled pore and surface structure depending on the type of monomer/comonomer and the polymerization reaction. Surface structure can be altered by controlled consecutive surface reactions. > In accordance with the bulk composition， polymer packings are stable across almost the entire pH range， particularly under strong alkaline conditions. > Chemical stability is affected by oxidizing and reducing solutions. > Although cross-linking reactions have been optimised in as much as rigid pressure stable particles can be manufactured， some remaining swelling property is often noted when changing the solvent composition in HPLC. > As in the manufacture of silica， porosity， pore size， and surface area of polymer packings can be adjusted over a wide range， and micro-， meso-， and macro- as well as non-porous beads are synthesized reproducibly. 3.2.4.2 Hydrophobic Polymer Stationary Phases The synthesis of cross-linked copolymers of styrene and divinylbenzene has been studied intensively and is well documented. The starting monomer is styrene， and divinylbenzene (DVB) is used as cross-linker. The amount of DVB can reach up to 55wt.%. At 55% DVB， the copolymer shows practically no swelling and possesses a permanent porosity. Figure 3.21 illustrates the network structure of poly(styrenedivinylbenzene) (St-DVB). Commercial products differ in bead size and pore size. There are even non-porous products on the market， designed for the rapid separation of peptides and proteins by reversed phase HPLC (Maa and Horvath， 1988). St-DVB copolymers are stable in the pH range 0–14. They find increasing application in the separation of low molecular weight compounds， peptides， and proteins by means of reversed phase chromatography (Tanaka et al.， 1987， Tweeten and Tweeten， 1986) and as parent materials for the synthesis of derivatized packings in interaction chromatography of biopoly-mers (Unger et al.， 1987， Regnier， 1987). Numerous other organophilic polymer packings have been synthesized for size exclusion and interactive HPLC after suitable derivatization. They are reviewed in depth by Mikes (1988). 展開
2010-11-30 04:37:20
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