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It is shown that the one-dimensional sampling sets correspond to Bessel sequences of complex exponentials that are not Riesz bases for $L^2[-R,R].$ A signal processing application in which such sampling sets arise naturally is described in detail.
      
The Discrete Wavelet Transform (DWT) is of considerable practical use in image and signal processing applications.
      
Among all image transforms, the classical (Euclidean) Fourier transform has had the widest range of applications in image processing.
      
The projectively adapted properties of theSL(2, ?)-harmonic analysis, as applied to the problems, in image processing, are confirmed by computational tests.
      
Such systems play an important role in time-frequency analysis and digital signal processing.
      
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In this paper, the methods for processing feather into textile goods are described. The raw material used is chicken feather. It was first boiled to remove fats and other substances, and then passed through the Shirley analyser several times to separate feather fibres and quills. As indicated in the paper the feather fibres can be used in different ways, such as manufacture of blanket, woolen yarn, etc.

本文报导了禽毛初步紡制成絨线、氈和毯子的方法。所用的原料为鷄毛。絨綫和氈系鷄毛与羊毛混合制成,毯子系鷄毛与棉纖維混合制成。文中对制成的品質作了扼要的叙述。

Design data for high purity toluene recovery from platformate by extractive distillation with phenol, were obtained by a pilot plant study. The extractive distillalations column, 200mm in diameter, possessed 44 bubble cap plates and had a Capacity o?processing 250 kilograms of feed per day. The platformate was first prefractionated to 70-117℃, which contained 0.8% benzene and 48% toluene by weight. The heart cut was then used as the feed for the extractive distillation. The recommended operating conditions...

Design data for high purity toluene recovery from platformate by extractive distillation with phenol, were obtained by a pilot plant study. The extractive distillalations column, 200mm in diameter, possessed 44 bubble cap plates and had a Capacity o?processing 250 kilograms of feed per day. The platformate was first prefractionated to 70-117℃, which contained 0.8% benzene and 48% toluene by weight. The heart cut was then used as the feed for the extractive distillation. The recommended operating conditions were as follows: phenol/feed ratio, 4; reflux ratio, 4-5; feed temperature, 120℃; phenol inlet temperature, 130℃. The actual plates of rectifying, stripping and phenol recovery section were 19, 20 and 5 respectively. The recovery of nitration grade toluene from the feed was 97-98%. When losses in prefractionation, acid washing and redistillation were included, the net recovery of toluene from the platformate was 93%. The result of this study gave the data for designing of full scale production plants.

为了提供以苯酚为溶剂用抽提蒸馏法从铂重整生成油中抽取纯甲苯的工业装置设计依据和操作条件,进行了日处理量为250公斤的中型试验。抽提蒸馏塔为一直径200毫米,拥有44个塔盘的泡帽塔。铂重整生成油先经预分馏切割成70—119℃馏份,其中苯含量为0.8%(重量),甲苯含量为48%(重量)。然后将该馏分进行抽提蒸馏,合理操作条件为酚油比4:1(体积比);回流比4.5;油进口温度120℃;酚进口温度130℃。精馏段塔盘数为19,汽提段塔盘数为20,酚回收段塔盘数为5。产品经酸碱洗涤和再蒸馏后为硝化级纯度的甲苯,抽提蒸馏的甲苯收率可达97—98%(重量)。如包括预分馏损失,则甲苯的收率为96%(重量)。酸碱洗涤和再蒸馏损失一般可按3%计,因此,纯甲苯净收率为93%(重量)。试验结果提供了工业装置的设计数据。

The results of Which experiment, herein reported was carried out at a newly established black tea factory in Sao-Shing, Chckiang, during 1957. The methods of biochemical examination are based on those used by tea factories in U. S. S. R. Which including such analysls as water contents of the withering leaves, percentage of buoken tissue after rolling, changing of soluble tannin during fermentation and water contents of the first and the second drying. According to the results of biochemical examination, standards...

The results of Which experiment, herein reported was carried out at a newly established black tea factory in Sao-Shing, Chckiang, during 1957. The methods of biochemical examination are based on those used by tea factories in U. S. S. R. Which including such analysls as water contents of the withering leaves, percentage of buoken tissue after rolling, changing of soluble tannin during fermentation and water contents of the first and the second drying. According to the results of biochemical examination, standards for the biochemical control of processing Ping-Suey Black-tea are susgested as in the following. 1. The average water contents, in green leaves of the spring, summer, and autumn flushes are 76.2±2.25; 74.54±1.41, and 74.16±0.86, respectively. The average surface water on rainy days is 9.9±4.0, such green leaves also have a relatively higher water content than leaves collected on non-rainy days. It is suggested that the weight of the extra water content should be deducted with the surface water when collecting leaves on rainy days. 2. The average water contents of the spring, summer and autnm flushes are reduced to 65.18±2.98, 63:9±2.73 and 63.9±3.0 respectively after withering. But better quality teas are between 58 and 60%. 3. After the last rolling the percentage of broken tissue of the No.3 dhool are: 90.0±5.6, 84.4±8.4 and 84.4±8.4; but the best is between 81% and 85%. 4. Soluble tannin contents are decreasing in the processing. The average percentages are: for green leaves 25.6±3.6; for withered leaves 22.1±2.6; both before and after fermentation, No. 1 dholl 21.3—16.3, No.3 dholl 19.1—12.8; dry tea, 12.6 (No. 1 dholl); 11.6 (No.2); 10.2(No.3). According.to statistical analysis, suggested figures for soluble tannin during fermentation for different ranges are tablated. 5. Water conents should be reduced to 18—24% after the first drying and 4—6% after the second drying.

1957年在越紅茶区的一个新建的机械化茶厂——浙江紹兴紅茶初制厂进行了紅茶初制工艺过程的生化管理試驗。試驗采用苏联茶厂的生化管理方法,对茶厂的生产过程作了生化檢驗,这就是萎凋检驗水分,揉捻檢驗細胞破碎率,发酵檢驗可溶性單宁的递減,干燥檢驗殘余水分。作者根据生化檢驗结果,經过統計分析,提出了越紅初制生化管理的指标如下: 1.生叶水分,春夏秋茶各为:76.20±2.25;74.54±1.41;74.16±0.86。雨水叶表面水分为9.9±4.0。 2.萎凋叶水分,春、夏、秋茶各为:65.2±3.0;63.9±2.7;63.9±3.0。良好萎凋的水分指标应该是58—62%。 3.揉捻叶细胞破碎率各茶季平均:1次1号茶61—62%;2次1号茶79—93%;3次1号茶90—92%(夏秋茶);品質最好的在86%以上。最后一次揉捻的3号茶的细胞破碎率平均在84—90%,品質较好的是81—85%。由上可知1次1号茶普遍细胞破碎率低,反映揉捻不足,可见1次1号茶单独发酵的技术规程不适于越红初制,应改为并入2次重揉,1957年生产实践证明这样的改变,结果良好。 4.初制工艺过程,可溶性单宁是有规律的递减,以夏茶为例,其平均值如下...

1957年在越紅茶区的一个新建的机械化茶厂——浙江紹兴紅茶初制厂进行了紅茶初制工艺过程的生化管理試驗。試驗采用苏联茶厂的生化管理方法,对茶厂的生产过程作了生化檢驗,这就是萎凋检驗水分,揉捻檢驗細胞破碎率,发酵檢驗可溶性單宁的递減,干燥檢驗殘余水分。作者根据生化檢驗结果,經过統計分析,提出了越紅初制生化管理的指标如下: 1.生叶水分,春夏秋茶各为:76.20±2.25;74.54±1.41;74.16±0.86。雨水叶表面水分为9.9±4.0。 2.萎凋叶水分,春、夏、秋茶各为:65.2±3.0;63.9±2.7;63.9±3.0。良好萎凋的水分指标应该是58—62%。 3.揉捻叶细胞破碎率各茶季平均:1次1号茶61—62%;2次1号茶79—93%;3次1号茶90—92%(夏秋茶);品質最好的在86%以上。最后一次揉捻的3号茶的细胞破碎率平均在84—90%,品質较好的是81—85%。由上可知1次1号茶普遍细胞破碎率低,反映揉捻不足,可见1次1号茶单独发酵的技术规程不适于越红初制,应改为并入2次重揉,1957年生产实践证明这样的改变,结果良好。 4.初制工艺过程,可溶性单宁是有规律的递减,以夏茶为例,其平均值如下:生叶25.6±3.6;萎凋叶22.1±2.6;发酵起迄1号茶21.3—16.3,3号茶19.1—12.8;毛茶:12.6(1号茶),11.6(2号茶),10.2(3号茶)。根据大量数据统计结果,越红发酵适度的可溶性单宁指标已经初步制订出来(表14)。 5.适度干燥的指标,第一次干燥的残余水分应为18—24%;第二次干燥应为4—6%。

 
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