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幫忙翻譯論文摘要

旖旎殤離 2018-11-16 22:06:50 432  瀏覽
  • 換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究... 換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究得了飛速發(fā)展。本次的實(shí)驗(yàn)是在前人設(shè)計(jì)的帶螺旋折流片(下簡(jiǎn)稱螺旋片)換熱器的基礎(chǔ)上再在內(nèi)圓管多加上擾流柱,分析不同操作參數(shù)和結(jié)構(gòu)參數(shù)條件下流體傳熱情況,由此得出影響換熱器傳熱性能的條件,為進(jìn)一步研究靜態(tài)混合器傳熱情況和其在實(shí)際工程及設(shè)計(jì)中的應(yīng)用奠定基礎(chǔ)。 本文對(duì)換熱器進(jìn)行了研究,測(cè)得殼程空氣進(jìn)出口溫度,利用溫差傳熱,以努塞爾準(zhǔn)數(shù)作為衡量換熱器傳熱性能的標(biāo)準(zhǔn),分別考察了雷諾數(shù)對(duì)努塞爾準(zhǔn)數(shù)的影響,并與空管進(jìn)行了比較。換熱器器中由于擾流柱的作用,使進(jìn)入管中的流體在流經(jīng)擾流柱時(shí)產(chǎn)生旋渦,有效地消除了徑向主流道的速度梯度和溫度梯度。因傳熱邊界層大大減薄,使得邊界層內(nèi)流體不斷得到更新,熱阻下降,傳熱過程得到強(qiáng)化。 通過實(shí)驗(yàn)可以得出一些結(jié)論: 由于有螺旋片同擾流柱的存在使得擾動(dòng)螺旋型換熱器的傳熱效果明顯要優(yōu)于圓滑管型換熱器同螺旋型換熱器;螺旋片使流體具有向外甩開的離心力,流體在流過擾流柱時(shí)因被分流、切割、再生,不僅加速了流速并且在柱后形成渦流,加速壁面流體的更新,減薄粘性邊界層底層的厚度,從而提高了傳熱性能; 同一模型在不同Re下,隨著Re的增加,Nu也隨著增加,在不計(jì)阻力時(shí),模型的傳熱效果隨著Re的增加而提高 不要在線翻譯的。希望幫一忙! 如果好再加100分,我現(xiàn)在非常急,馬上就要交了。 展開

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幫忙翻譯論文摘要
換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究... 換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究得了飛速發(fā)展。本次的實(shí)驗(yàn)是在前人設(shè)計(jì)的帶螺旋折流片(下簡(jiǎn)稱螺旋片)換熱器的基礎(chǔ)上再在內(nèi)圓管多加上擾流柱,分析不同操作參數(shù)和結(jié)構(gòu)參數(shù)條件下流體傳熱情況,由此得出影響換熱器傳熱性能的條件,為進(jìn)一步研究靜態(tài)混合器傳熱情況和其在實(shí)際工程及設(shè)計(jì)中的應(yīng)用奠定基礎(chǔ)。 本文對(duì)換熱器進(jìn)行了研究,測(cè)得殼程空氣進(jìn)出口溫度,利用溫差傳熱,以努塞爾準(zhǔn)數(shù)作為衡量換熱器傳熱性能的標(biāo)準(zhǔn),分別考察了雷諾數(shù)對(duì)努塞爾準(zhǔn)數(shù)的影響,并與空管進(jìn)行了比較。換熱器器中由于擾流柱的作用,使進(jìn)入管中的流體在流經(jīng)擾流柱時(shí)產(chǎn)生旋渦,有效地消除了徑向主流道的速度梯度和溫度梯度。因傳熱邊界層大大減薄,使得邊界層內(nèi)流體不斷得到更新,熱阻下降,傳熱過程得到強(qiáng)化。 通過實(shí)驗(yàn)可以得出一些結(jié)論: 由于有螺旋片同擾流柱的存在使得擾動(dòng)螺旋型換熱器的傳熱效果明顯要優(yōu)于圓滑管型換熱器同螺旋型換熱器;螺旋片使流體具有向外甩開的離心力,流體在流過擾流柱時(shí)因被分流、切割、再生,不僅加速了流速并且在柱后形成渦流,加速壁面流體的更新,減薄粘性邊界層底層的厚度,從而提高了傳熱性能; 同一模型在不同Re下,隨著Re的增加,Nu也隨著增加,在不計(jì)阻力時(shí),模型的傳熱效果隨著Re的增加而提高 不要在線翻譯的。希望幫一忙! 如果好再加100分,我現(xiàn)在非常急,馬上就要交了。 展開
2018-11-16 22:06:50 432 0
幫忙翻譯論文摘要
換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究... 換熱器是化工、煉油、動(dòng)力、食品、輕工等許多工業(yè)部門廣泛應(yīng)用的一種通用設(shè)備。其性能的好壞直接影響過程工業(yè)熱經(jīng)濟(jì)性的高低。近年來,由于能源危機(jī),強(qiáng)化傳熱技術(shù)和新型換熱器的研究得了飛速發(fā)展。本次的實(shí)驗(yàn)是在前人設(shè)計(jì)的帶螺旋折流片(下簡(jiǎn)稱螺旋片)換熱器的基礎(chǔ)上再在內(nèi)圓管多加上擾流柱,分析不同操作參數(shù)和結(jié)構(gòu)參數(shù)條件下流體傳熱情況,由此得出影響換熱器傳熱性能的條件,為進(jìn)一步研究靜態(tài)混合器傳熱情況和其在實(shí)際工程及設(shè)計(jì)中的應(yīng)用奠定基礎(chǔ)。 本文對(duì)換熱器進(jìn)行了研究,測(cè)得殼程空氣進(jìn)出口溫度,利用溫差傳熱,以努塞爾準(zhǔn)數(shù)作為衡量換熱器傳熱性能的標(biāo)準(zhǔn),分別考察了雷諾數(shù)對(duì)努塞爾準(zhǔn)數(shù)的影響,并與空管進(jìn)行了比較。換熱器器中由于擾流柱的作用,使進(jìn)入管中的流體在流經(jīng)擾流柱時(shí)產(chǎn)生旋渦,有效地消除了徑向主流道的速度梯度和溫度梯度。因傳熱邊界層大大減薄,使得邊界層內(nèi)流體不斷得到更新,熱阻下降,傳熱過程得到強(qiáng)化。 通過實(shí)驗(yàn)可以得出一些結(jié)論: 由于有螺旋片同擾流柱的存在使得擾動(dòng)螺旋型換熱器的傳熱效果明顯要優(yōu)于圓滑管型換熱器同螺旋型換熱器;螺旋片使流體具有向外甩開的離心力,流體在流過擾流柱時(shí)因被分流、切割、再生,不僅加速了流速并且在柱后形成渦流,加速壁面流體的更新,減薄粘性邊界層底層的厚度,從而提高了傳熱性能; 同一模型在不同Re下,隨著Re的增加,Nu也隨著增加,在不計(jì)阻力時(shí),模型的傳熱效果隨著Re的增加而提高 不要翻譯軟件翻譯的。如果好再加分 展開
2018-11-25 12:54:46 431 0
摘要,關(guān)鍵字翻譯
摘要:從天然食用紫卷心菜中以水作溶劑提取紫紅色素,分別用微波和超聲波作輔助并對(duì)提取溫度、時(shí)間及次數(shù)等工藝條件進(jìn)了研究。實(shí)驗(yàn)結(jié)果表明,微波輔助之以水作溶劑提取天然食用紫卷心... 摘要:從天然食用紫卷心菜中以水作溶劑提取紫紅色素,分別用微波和超聲波作輔助并對(duì)提取溫度、時(shí)間及次數(shù)等工藝條件進(jìn)了研究。實(shí)驗(yàn)結(jié)果表明,微波輔助之以水作溶劑提取天然食用紫卷心菜中紫紅色素效果Z好,Z佳提取條件為:微波火力為80,輻射時(shí)間180秒。 關(guān)鍵字:紫卷心菜;紅色素;提??;微波;超聲波。 展開
2009-05-15 15:29:46 409 2
【生物專業(yè)英語】摘要翻譯
Abstract:Heavymetals,suchascadmium,copper,lead,chromiumandmercury,areimportantenvironmentalpollutants,particularlyinareaswithhighanthropogenicpressure.Theirpresenceinthea... Abstract: Heavy metals, such as cadmium, copper, lead, chromium and mercury, are important environmental pollutants, particularly in areas with high anthropogenic pressure. Their presence in the atmosphere, soil and water, even in traces can cause serious problems to all organisms, and heavy metal bioaccumulation in the food chain especially can be highly dangerous to human health. Heavy metals enter the human body mainly through two routes namely: inhalation and ingestion, ingestion being the main route of exposure to these elements in human population. Heavy metals intake by human populations through food chain has been reported in many countries. Soil threshold for heavy metal toxicity is an important factor affecting soil environmental capacity of heavy metal and determines heavy metal cumulative loading limits. For soil-plant system, heavy metal toxicity threshold is the highest permissible content in the soil (total or bioavailable concentration) that does not pose any phytotoxic effects or heavy metals in the edible parts of the crops does not exceed food hygiene standards. Factors affecting the thresholds of dietary toxicity of heavy metal in soil-crop system include: soil type which includes soil pH, organic matter content, clay mineral and other soil chemical and biochemical properties; and crop species or cultivars regulated by genetic basis for heavy metal transport and accumulation in plants. In addition, the interactions of soil-plant root-microbes play important roles in regulating heavy metal movement from soil to the edible parts of crops. Agronomic practices such as fertilizer and water managements as well as crop rotation system can affect bioavailability and crop accumulation of heavy metals, thus influencing the thresholds for assessing dietary toxicity of heavy metals in the food chain. This paper reviews the phytotoxic effects and bioaccumulation of heavy metals in vegetables and food crops and assesses soil heavy metal thresholds for potential dietary toxicity. 用翻譯軟件的免回,哥也有,真誠求助高手! 展開
2010-12-13 19:23:10 631 1
翻譯納米材料摘要(2)
Moreover, the particle size of incorporated ZnO calculated from the effective mass model was close to the results obtained from HRTEM. The synthesis method developed in course of this work can be used for the fabrication of different polym... Moreover, the particle size of incorporated ZnO calculated from the effective mass model was close to the results obtained from HRTEM. The synthesis method developed in course of this work can be used for the fabrication of different polymer-inorganic transparent nanocomposites with other functionalities. In the second part of the thesis, we studied a method for the fabrication of micro-porous surface layer – made of copper nanoparticles – on the surface of copper plates (suitable for heat exchangers). The micro-porous surfaces were formed from dendritic network of copper nanoparticles obtained by electrodeposition from solution using dynamic bubble formation and removal as template. The surface layer engineered and its structures were optimized in order to enhance the boiling heat transfer coefficient. To further optimize the dendritic structure, additional annealing step was introduce and its effect on the surface layer structure and properties were investigated. The properties of the deposited surface structures were investigated and its effect on the enhancement of the heart transfer coefficient has been studied. The fabricated enhanced surface has shown an excellent performance in nucleate boiling. Pool boiling tests were performed on refrigerant fluids (R134a) to evaluate the boiling performance of the electrodeposited nanostructured micro-porous structures. At heat flux of 1 W/cm2, the heat transfer coefficient is enhanced over 15 times compared to a plain reference surface. A model has been presented to explain the enhancement based on the structure characteristics. 展開
2006-10-18 01:46:56 415 4
接地工程論文英文摘要
我想找一篇范文
2006-05-24 10:11:07 427 1
納米材料的摘要翻譯(7)
Drivers and Directions In the United States, the EPA and NIOSH are spearheading research into nanoparticles and their associated health risks through a variety of funded research projects and information exchange programs. NIOSH’s Web si... Drivers and Directions In the United States, the EPA and NIOSH are spearheading research into nanoparticles and their associated health risks through a variety of funded research projects and information exchange programs. NIOSH’s Web site also cites its participation in the multiagency National Nanotechnology Initiative and the Nanoscale Science, Engineering and Technology Subcommittee of the National Science and Technology Council’s Committee on Technology. But on the whole, the study of nanotechnology in the workplace is still in its infancy. Or as Keith Rickabaugh, technical director of materials and analytical services for RJ Lee Group, Monroeville, Pa., puts it, “what has been learned is that there is much more to learn.” Rickabaugh goes on to say that, “We need to learn how to economically/reasonably establish safe work practices and engineering controls to protect workers from an ‘unknown’ exposure risk. That includes performing studies to document the health risks of nanosized particles, and training workers to understand and be able to characterize those materials.” 展開
2006-10-18 01:02:26 615 3
急 幫我翻譯下這個(gè)摘要 有寫好的 幫忙修改下
摘要:實(shí)驗(yàn)測(cè)定和比較了九頂山雞不同品系雞肉中微量元素的含量的差異。以及同種品系胸肌和腿肌中微量元素的差異。分析不同品系和同種品系之間微量元素的差異。根據(jù)生長性能、雞的血緣... 摘要:實(shí)驗(yàn)測(cè)定和比較了九頂山雞不同品系雞肉中微量元素的含量的差異。以及同種品系胸肌和腿肌中微量元素的差異。分析不同品系和同種品系之間微量元素的差異。根據(jù)生長性能、雞的血緣、生產(chǎn)性能等把九頂山雞分為九頂山雞Ⅰ號(hào),九頂山雞Ⅱ號(hào),九頂山雞Ⅲ號(hào)。以九頂山雞腿部肌和胸肌為實(shí)驗(yàn)材料采用微波消解及等離子發(fā)射光譜儀(ICP)測(cè)定其cd、co微量元素的含量,并進(jìn)行對(duì)比。其結(jié)果表明 Abstract: This study is to compare trace elements Jiudingshan chicken (Gus Gallus) and the differences between other species. in same strains Breast and leg muscles difference between the trace element. According to the growth performance, chicken's blood, production performance, etc. Species can be divided into types I and ll and lll Jiudingshan chicken (Gus Gallus). Experimental material as the legs and chest, using microwave plasma atomic emission spectrometry (ICP) of the trace elements measured and compared. The results showed that: 展開
2011-04-30 03:09:01 448 2
幫忙翻譯
AttachingtheSampleChuckYouwillneeda#2Phillipsscrewdriverforthisstep.FollowingthedetailsshowninFig.2-4,installthesamplechuckbyfirstaligningthepinsonthebottomofthesamplechu... Attaching the Sample Chuck You will need a #2 Phillips screwdriver for this step. Following the details shown in Fig. 2-4, install the sample chuck by first aligning the pins on the bottom of the sample chuck with the receptacles on the alpha- SE base. Then tighten the upper two captive thumb screws. Next, use the Phillips screwdriver to tighten the lower two captive screws. Don’t over tighten the screws! It will make it difficult to remove them in the future; just ensure that the screws are snug. Finally, connect the vacuum line from the sample chuck to the vacuum fitting on the alpha-SE base. Releasing the Z-stage Shipping Lock To access the Z-stage shipping lock, first loosen the captive screw on the lamp/shipping lock access door, then open the access door by rotating 180°, as shown in Fig. 2-5. To release the Z-stage shipping lock, stand in front of the ellipsometer and use your left hand to balance the weight of the Z-stage (you will feel it lift up slightly). It will be difficult to release the shipping lock if you apply too much or not enough upward force. Next, use your right hand to move the shipping lock to the operating position (to the right, see Fig. 2-6). If the lock is hard to move, you can use a tool to gain more leverage. The shipping lock will move about 1/3” [8mm] to the right. Checking the Lamp Check that the QTH lamp in fully seated in the lamp housing. The lamp is located behind the actuator screw (see Fig. 2-6) and has two white wires protruding from the back of the lamp. Simply push down on the lamp ensuring that the lamp is fully seated in the lamp housing. Rotate the lamp/shipping lock access door to the closed position and hand tighten the captive screw. 拒絕翻譯軟件,翻譯軟件我自己也會(huì)用 不是用翻譯軟件我就看不懂,只是,上來找人翻譯就是希望翻譯出比較容易看懂,不需要自己對(duì)照就可以看的說明書,如果用翻譯軟件,根本就詞不達(dá)意,還是要自己對(duì)著原文件核實(shí) 既然用了那么多積分,就希望有相當(dāng)?shù)某晒绻梅g軟件混積分,那就是人品問題了 還有,某些人不要不懂亂說混積分 展開
2008-06-22 15:11:54 651 5
翻譯一段納米材料的摘要(1)
Abstract Nanomaterials and nanotechnology have been hot issues during the recent decades. This thesis deals with the fabrication and engineering of novel nanomaterials with enhanced functionality, particularly nanocomposites and nanostruc... Abstract Nanomaterials and nanotechnology have been hot issues during the recent decades. This thesis deals with the fabrication and engineering of novel nanomaterials with enhanced functionality, particularly nanocomposites and nanostructured surfaces. The study includes two parts; in the first part, bulk transparent polymer-inorganic nanocomposites were produced by a novel synthesis method and its UV-absorption has been investigated. In the second part, nanostructured microporous surface layers, of copper, were fabricated by electrodeposition process and its effect on material’s performance for pool boiling has been investigated evaluated.In the first part of the thesis, bulk polymer-inorganic nanocomposites composed of poly(methylmethacrylate) (PMMA) and zinc compounds were prepared by an in situ sol-gel transition polymerization of zinc complex in PMMA matrix. The immiscibility of heterophases of solid organic and inorganic constituents was resolved by the in situ sol-gel transition polymerization of ZnO nanofillers within PMMA in the presence of dual functional agent, monoethanolamine, which provided strong secondary interfacial interactions for both complexing and crosslinking of constituents. Comprehensive characterization of the polymer-inorganic hybrid materials has been undertaken using a wide range of techniques; XRD, 1H NMR, FT-IR, TGA, DSC, UV-Vis, ED, SEM, TEM and HRTEM. The homogeneous PMMA-ZnO nanocomposites exhibited enhanced UV-sheltering effects in the entire UV range even at very low ZnO content of 0.02 wt%. 展開
2006-10-18 01:02:42 395 4
幫忙找一下論文
幫忙找一下 關(guān)于紅外技術(shù)發(fā)展史 的論文或者資料 急~~~~~~~~~~ 如果好~~我可以再加分
2006-02-27 04:12:49 432 1
幫忙翻譯一句話
Catalysts were prepared by pore volume impregnation of ?-alumina
2008-05-28 15:55:47 274 1
幫忙翻譯2
3.6. Advantages of chromia as promoter in copper-based Catalysts It should also be noted from Figs. 5 and 6 that in the steam reforming reaction to produce hydrogen for fuel cell applications, trace quantities (<0.4 wt.%) of Cr2O3 on Cu... 3.6. Advantages of chromia as promoter in copper-based Catalysts It should also be noted from Figs. 5 and 6 that in the steam reforming reaction to produce hydrogen for fuel cell applications, trace quantities (<0.4 wt.%) of Cr2O3 on Cu not only doubled the activity for the MSR but also halved the amount of CO formed, thereby enhancing H2 production. This improved selectivity reduces the problem of H2 separation from the reaction products in fuel cell applications. An important finding in this research is the role that very small amounts of Cr2O3 play in all the reactions investigated, namely, methanol synthesis, water gas shift and methanol steam reforming. In commercial co-precipitatedcopper-based methanol synthesis catalysts, copper is known to be the active component [3]. More recently, it has becomeestablished that ZnO promotes methanol synthesis and that surface species formed by Cu-ZnO interaction are responsible for methanol synthesis [42]. The role of Cr2O3 in commercial catalysts is thought to be similar to that of Al2O3, which is to act as stabilizer of the structure of the copper catalyst, thereby reducing sintering. In this study, as in a previous one [18] using a different technique todeposit chromia on the surface of skeletal copper, we have shown that Cr2O3 has a significant role in copper-based methanol synthesis from CO2. That role is to improve the methanol yield by reducing the RWGS reaction (Fig. 3) aswas observed in the earlier study [18]. A major finding of this study has been the very strong evidence the Cr2O3 has a synergistic effect on the activity of copper for methanol synthesis, methanol steam reforming and the water gas shift reactions. From Figs. 4 and 5 it can be seen that 0.85 wt.% Cr2O3 enhances the specific activity (mol/hm2 Cu) of skeletal copper 270% for the WGS and 150% for methanol steam reforming. In the case of methanol synthesis (Fig. 2) 0.61 wt.% Cr2O3 increases the specific activity of copper by 67%. The results for the WGS and MS reactions are similar to those obtained under the same reaction conditions using skeletal copper promoted by Cr2O3 which was deposited from sodium chromate in the caustic leach liquor [28]. In that study, the effect of chromia was more pronounced, with an increase in activity of 950% for theWGSand 168% for the MSR reaction, respectively, using skeletal copper containing 0.75 wt.% Cr2O3. For methanol synthesis over Cr2O3 promoted skeletal copperprepared using sodium chromate in the leach liquor, Ma et al. [18] observed no increase in the specific activity of copper. 展開
2006-06-03 16:46:44 580 3
數(shù)控機(jī)床維修技術(shù)的摘要是什么,?寫論文······
數(shù)控機(jī)床維修技術(shù)的摘要是什么,?我在寫論文,哪位仁兄指點(diǎn)一二~~~~~??!謝謝了
2009-01-02 11:55:24 572 2
幫忙檢索會(huì)議論文
哪位好心人能幫忙查一下“Does “Sell in May” effect exist in Chinese A share market?—— An empirical analysis based on ARMA-GARCH model”這篇會(huì)議論文有沒有被CPCI-SSH數(shù)據(jù)庫檢索?跪謝!
2018-11-26 06:55:20 419 0
幫忙翻譯一段英語
Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxy... Plant material and culture conditions have been described (7). Briefly, a diploid tissue culture line, WOO1C, of wild carrot, Daucus carota L., was maintained in Murashige and Skoog medium supplemented with 0.1 mg of 2,4-dichlorophenoxyacetic acid (2,4-D). To regenerate plants from the culture, callus tissue was transferred to the same medium devoid of 2,4-D (embryogenic medium). All experiments were performed with cultures grown in liquid medium. For convenience, cultures grown in 2,4-D-containing medium are referred to as "callus cultures", and those grown in medium without 2,4-D as "embryo cultures." The growth of callus cultures was measured by the sidearmturbidity method (7). The number of cells at any time point of growth was estimated from turbidity in a Klett-Summerson calorimeter and was expressed in arbitrary units. For example, Klett 100 corresponds to ="2 X 106 cells per ml. The relationship is linear up to Klett 150 in our Klett-Summerson colorimeter. Suspension cultures ofWOOLC cell line are normally maintained at cell densities between 106 and 107 cells per ml in 0.1 mg of 2,4-D per liter (high-density culture) in shake flasks. During a quantitative study on embryogenesis, we found that maximal embryo production can be achieved by first incubating the culture at high density in medium without 2,4-D for one generation time and then diluting it to 2-3 x 104 cells per ml (low-density culture). To compare cultures of comparable density, callus cultures and embryo cultures were subjected to the same procedure. To initiate low-density embryo or callus cultures, an 8-day-old high-density culture grown at the logarithmic phase was washed three times with fresh callus or embryogenic medium and resuspended at 8 x 105 cells per ml for one generation (3 days) in its corresponding medium. It was then diluted to 2 x 104 cells per ml; 20 ml of the culture was incubated in a plastic Petri dish (9 cm in diameter) at 240C. The morphogenetic events of the cultures were examined and photographed under a dissecting microscope. 請(qǐng)不要用google的那個(gè),我看不懂~~ 展開
2008-02-19 03:32:04 531 2
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
高手幫忙翻譯?。?100
虛擬儀器是一種新的測(cè)試與測(cè)控技術(shù),近年來得到了迅速發(fā)展,基于虛擬儀器的機(jī)器視覺系統(tǒng)就是其領(lǐng)域的一個(gè)重要分支。本文圍繞基于虛擬儀器的機(jī)器視覺有關(guān)理論和其在玻璃瓶口缺陷檢測(cè)中... 虛擬儀器是一種新的測(cè)試與測(cè)控技術(shù),近年來得到了迅速發(fā)展,基于虛擬儀器的機(jī)器視覺系統(tǒng)就是其領(lǐng)域的一個(gè)重要分支。本文圍繞基于虛擬儀器的機(jī)器視覺有關(guān)理論和其在玻璃瓶口缺陷檢測(cè)中的具體應(yīng)用進(jìn)行了研究。 針對(duì)玻璃瓶這一對(duì)象檢測(cè)的高精度、高準(zhǔn)確度、實(shí)時(shí)性的特點(diǎn),本文提出了一種基于LabVIEW的數(shù)字圖像處理檢測(cè)方案,并在設(shè)計(jì)過程中解決了一系列關(guān)鍵問題:利用硬件和軟件的編程實(shí)現(xiàn)了對(duì)玻璃瓶口的缺陷監(jiān)測(cè);使用閾值進(jìn)行圖像的二值化處理,并進(jìn)行開啟、閉合以增強(qiáng)圖像質(zhì)量;使用Vision Builder AI對(duì)有故障的圖像進(jìn)行故障特征識(shí)別; 通過理論研究與實(shí)驗(yàn),證明了本文所提出的玻璃瓶口缺陷監(jiān)測(cè)方法是有效和可行的,為其機(jī)器視覺檢測(cè)的進(jìn)一步研究和開發(fā)奠定了很好的基礎(chǔ) 請(qǐng)用專業(yè)術(shù)語,不要用在線翻譯。謝謝····好可以多加分 展開
2008-06-10 11:03:29 488 3

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