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two columns
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  双塔
     The separation of the mixture of ethylene and carbon dioxide was conducted on a pressure swing adsorption equipment with two columns, and the effect of experimental conditions on separation were investigated.
     在双塔变压吸附分离装置上进行了C2H4-CO2气体混合物的分离试验,考察了吸附时间、吸附压力等条件对吸附分离性能的影响。
短句来源
     The key points of the method are the treatment of virtual feed, the selection of virtual feed points and combined correction of the said two columns.
     该方法的关键是虚拟物料的处理、虚拟进料点的选择以及双塔联合校正。
短句来源
     Two columns rectification process and three columns rectification process were discussed in methanol rectification technology, the advantages of packing type rectifying column with high effective wire net corrugated packing and distributor were introduced, economy was compared for two columns rectification technology with the three columns rectification technology.
     论述了甲醇精馏技术中双塔和三塔精馏工艺,介绍了采用高效丝网波纹填料和分布器的填料型精馏塔的优点。 对双塔和三塔精馏技术的经济性进行了比较。
短句来源
  两塔
     The result shows that sulfur capacity is 28.7% for E 2 and 6.7% for H 4. Comprehensive sulfur capacity reached 14.1% when two columns were arranged in series and E 2, H 4 absorbents were loaded respectively. Odorant from petroleum refining whose concentration of sulfur compounds is below 1 000 mg/L has been effectively treated.
     研究结果表明 :E 2、H 4的硫容分别为 2 8.7%和 6 .7% ,采用分别装填E 2、H 4的两塔串联工艺的综合硫容为 14 .1% ,可有效治理硫化物浓度在 10 0 0mg/m3 以下的炼油恶臭废气。
短句来源
     The separation process of two columns is also tested for promoting product purity;
     为进一步提高产品的纯度,试验中还采用了两塔连续精馏工艺,第二塔理论板数为5。
短句来源
     The hot energyoptimization results, operating conditions and process parameters were obtained forthe two columns to produce qualified pitch; the simulation results supply basic datafor engineering design.
     本文使用PRO/II软件对上述混合原油采用常压、减压蒸馏方法生产沥青的工艺进行了流程模拟,对常压塔和减压塔的取热分配进行了优化,确定了生产合格沥青产品的两塔操作条件及各个物流的工艺参数,为工程设计提供了可靠依据。
短句来源
     Under the conditions that the tower pressure and bottom flow rate from the high pressure tower were given, taking comprehensive benefit as optimizing object, reflux ratio between two columns as decision variable, the optimization calculation was performed with one-dimension fixed step search method and the operating conditions for the binary distillation column were determined.
     在规定各塔压和高压塔塔底流量的条件下,以综合效益为优化目标,以两塔的回流比为决策变量,采用一维定步长搜索给出决策变量改进值的方法进行优化计算,确定了双效精馏流程的工艺操作条件。
短句来源
     The acetaldehyde distillation units are composed of two distillation columns, one is used to remove the light component and one end-product column. Coupling problems in the end-product column are encountered because of the dual component control strategy implemented by conventional PID control, due to heat integration, coupling problems are also existed between the two columns, which cause the operation of the distillation units difficult.
     乙醛精制装置由脱轻组分塔与成品塔两个精馏塔组成,成品塔采用双组分PID常规控制策略,因此存在严重的耦合问题,同时两塔间也存在耦合问题,导致该精制装置的操作不易稳定。
  “two columns”译为未确定词的双语例句
     Two columns were used in treating 2000 mL this kind of wastewater in series for 2 hours. The removal rates of Cr,Cu~(2+) and COD were 92.1%,99.2% and 71.4%, when the initial concentrations were 60.4 mg/L,4.51 mg/L and(48.2 mg/L) respectively.
     串联处理2000 mL总Cr、Cu2+和COD浓度分别为60.4、4.51和48.2 mg/L的电镀废水2 h后,去除率分别高达92.1%、99.2%和71.4%。
短句来源
     In this paper,orthogonal arrays L'16(212),L'16(214),L36(211×312),L108(349),L108(23 x 349),L108(211 x 348) and L108(235x 336)are given. Since these arrays do notcontain interaction column of any two columns they would be useful for parameter designs.
     本文给出对参数设计有用的几个正交表L′16(212),L′16(214),L36(211×312),L108(349),L108(23×349),L108(211×348)和L108(235×336)这些正交表不包含交互作用列,适合于参数设计使用。
短句来源
     Determination of Organophosphorus Pesticides in Seawater by GC-FPD Using Two Columns
     GC-FPD双柱法测定海水中的痕量有机磷
短句来源
     Two columns (3M×3mm) were packed with 2% OV_(17) on 80~100mesh acidwashed and silanized gas chromosorb.
     该法主要的色谱条件如下:固定相2%OV_(17),玻璃填充柱,3m长,内径3mm。
短句来源
     It is generally taken that the interactions between two columns of some orthogonal arrays like L12(211),L18(2×37), L36(23×313), etc.
     通常人们认为诸如L_(12)(2~(11)),L_(18)(2×3~7),L_(36)(2~3×3~(13))等正交表中任意两列间的交互作用均匀分散在其它各列中,这一看法是否合理?
短句来源
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  two columns
In the improved separation process (step two), two columns (one extractive distillation column and the other solvent recovery column) were added and some simplification was made so as to recycle MIBK.
      
We then generalize the algorithm to one that tolerates multiple errors in multiple iterates ofU provided they are confined to two columns.
      
The linearized operator of the problem of a solid oscillating in a fluid can be realized as an operator matrix obtained by appending two scalar rows and two columns to the Stokes operator.
      
The GLC retention parameters of α-, β-, and γ-isomers of formyl-, acetyl-, and aminopyridines were determined on two columns with stationary phases of different polarities.
      
The principle of cycle repetition with reversal of two columns is extended to two-cycle circulation chromatography as a version of preparative liquid chromatography.
      
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Two sympodic fetuses (sympus dipus) of 7-8 months present very similarabnormalities. The lower extremities are fused along their posterolateral borders.Many muscles are missing or anomalous on their posterior aspects and in thesoles. The perineum is completely obliterated. The caudal parts of the digestiveand urogenital systems are absent. Their lumbosacral cords have been studiedin serial sections in comparison with a normal series with the followingresults: The general features of the cross sections of the...

Two sympodic fetuses (sympus dipus) of 7-8 months present very similarabnormalities. The lower extremities are fused along their posterolateral borders.Many muscles are missing or anomalous on their posterior aspects and in thesoles. The perineum is completely obliterated. The caudal parts of the digestiveand urogenital systems are absent. Their lumbosacral cords have been studiedin serial sections in comparison with a normal series with the followingresults: The general features of the cross sections of the sympodic cords are erratic:The sections are smaller, compressed mediolaterally or ventrodorsally and theirtwo sides are not symmetrical. The central canal is shifted ventrally. The graymatter of the anterior horn spreads anteriorly while the white matter in thisregion becomes thinned off, but compensatively thickened in the adjacent parts. The constellation of the motor cell groups is anomalous: Apart from themedial group in the anterior horn, the lateral group is shifted ventrolaterally.The cell columns are smaller in cross section, poorly defined and scattered nearthe anterior white matter. They become abruptly attenuated from the middlepart of the series downward and soon leave the anterior horn a total blank. The number of motor cells in the anterior horn is decreased: The cellmagnitude of the lateral column in sympodic fetus 1 is estimated at 72.1% ofthe normal. In sympodic fetus 2 it falls to 27.5%. The percentage values of themedial cell columns in sympodic fetuses 1 and 2 dwindle to 55.4% and 28.7%respectively. Taking together the two columns, the percentages of the motorcells in sympodic fetuses 1 and 2 are reduced to 71.0 and 27.6 respectively. The reduction and anomaly of the muscles are concentrated in the caudalsegments of the sympodic body,--the pelvis and perineum in particular. Themotor cells in the anterior horn of the lumbosacral cord show a commensuratedecrement, especially at the caudalmost levels. The degree of development ofthe myotomes is correlated with the magnitude of their central motor cells.

胎龄7—8月的二个单腿胎儿(双足单腿畸胎)表现近似的畸变。左右下肢愈合,後侧和足心的肌肉多有歉缺。会阴部完全无有。消化、生殖和泌尿器的下端全不存在。二胎的脊髓腰骶部经切片观察,与常胎比较,发现以下的事实。脊髓的切面形相乖异:切面减小;左右或前後扁窄;左右不复对称;中央管偏居前方;前角的灰质拓向前侧;此部的白质显著减薄,但在它处却相当加厚。前角的细胞群簇配布失常:除内侧群外,外侧各群拓前前方。各核团切面单薄,界限不清,贴白质星散配布。到了腰膨大的中部,核因形体骤减,前角随即全成空白。前角的运动细胞数量大减:畸胎1的外侧柱的细胞分量约当常胎数值的72.1%;畸胎2低至27.5%。。在畸胎1和2,内侧柱的百分数值分别少到55.4和28.7。若合看内外二柱,它们的百分数值分别减至71.0和27.6。在单腿畸胎中,肌肉的歉缺多在下部的体节,特是骨盆和会阴。它们的脊髓骶部中,前角的细胞相应减少,特在尾端。身体肌节的发展程度与主管的中枢细胞的数量是相系的。

The fore foot of the mole is three times larger than its hind foot. Serialsections of the spinal cords of two adult moles were prepared for a comparativestudy of the motor centers of the fore and hind legs in the cervical and lum-bar enlargements. The magnitude of the motor cells in the anterior horn of the cervicalenlargement (centers of leg muscles), wheh taken collectively, is 2.5--2.8 timesthat of the lumbar enlargement. The motor cells in the posterior part of theanterior horn (posterolateral and retroposterolateral...

The fore foot of the mole is three times larger than its hind foot. Serialsections of the spinal cords of two adult moles were prepared for a comparativestudy of the motor centers of the fore and hind legs in the cervical and lum-bar enlargements. The magnitude of the motor cells in the anterior horn of the cervicalenlargement (centers of leg muscles), wheh taken collectively, is 2.5--2.8 timesthat of the lumbar enlargement. The motor cells in the posterior part of theanterior horn (posterolateral and retroposterolateral columns,--centers of footmuscles) of the cervical enlargement, if compared separately, are 3.4--4.0 timesthose of the lumbar enlargement. The two columns innervating the foot muscles contain enormous cells,break into subcolumns and thrust posterolaterally to form a new "horn" whichis even larger than the original anterior horn on many levels. The upper part of the retroposterolateral column (centers of digital mus-cles) is better developed than the lower part. With cells exceedingly hypertro-phied and subcolumns well differentiated, the upper end seems in control ofthe huge big toe (and also partially of the large-sized second and third toes).while the motor center of the little toe is apparently located at the lowerend. The immense bulk of the fore leg of the mole is associated with a cor-responding differentiation of its spinal centers. The development of a peripheralpart is correlated with a commensurate structure on the central side.

鼹鼠的前足约为後足的3倍。本研究用二个成长鼹鼠的脊髓,作连续染片,比较颈腰膨大部中前後肢的运动中枢的形态。若综合比较颈腰膨大部前角的运动细胞(肢肌的中枢)的数量,颈部约当腰部的2.5—2.8倍。若单独比较前角后部的运动细胞(後外侧柱和後後外侧柱——足肌的中枢)的数量,颈部竟大到腰部的3.4—4.0倍。支配足肌的二柱细胞巨大,分出亚柱,胞团外拓,形成一个新角;有些阶段,它更大过原来的前角。後後外柱的上端比下端发展得多。上端细胞巨大,亚群明显,似主管奇大的踇趾(和二、三趾);小趾的中枢似在下端。鼹鼠前肢的(厂龙)大联系脊髓中枢的分化。周缘部的发展程度与中枢部的形态是相系的。

The discovery of the larval form of the species of Asymphylodora Looss (1899) dated back to the time of von Baer (1827), who described Cercaria paludinae impurae, De Filippi (1854) recorded from the same snail host a distome bearing the same name. For one and half century knowledges regarding the developmental life history of the well-known type of the genus, A. tincae, have gradually accumulated. Small as it is, the worm, however, has received the attention of many a distinguished helminthologists such as Diesing...

The discovery of the larval form of the species of Asymphylodora Looss (1899) dated back to the time of von Baer (1827), who described Cercaria paludinae impurae, De Filippi (1854) recorded from the same snail host a distome bearing the same name. For one and half century knowledges regarding the developmental life history of the well-known type of the genus, A. tincae, have gradually accumulated. Small as it is, the worm, however, has received the attention of many a distinguished helminthologists such as Diesing (1858), Looss (1899). Lithe (1809), Fuhrmann (1916), Dubois (1909), Wesenberg-Lund (1934) and Skrjabin (1955). The recent work of Deblock, Capron and Biguet (1957) elucidated the life cycle of a new subspecies, A. tincae var. mediagraba, while other workers like Serkova and Bykhovskii (1940), Biguet, Deblock and Capron (1956) and Stunkard (1959) described the development of several progenetic species, The significance of progenesis to the phylogeny of Digenea is discussed by Stunkard (1959). Inspire of the above-mentioned important advances on the knowledge of this genus, there still remain much to be worked out regarding the biology of this group.The present communication repoorts life history studies on Asymphylodora macostoma Ozaki, 1925 and A. japonica Yamaguti, 1928.The adults of A. macrostoma were obtained from Puntia sp. (Cyprinidae) occurring in the mountain stream of Yungan, Central Fukien. Their structure and measurements were described in detail. They are indistinguishable from the original description of Czaki (1925) and Yamaguti (1938). The molluscan intermediate host of A. macrostoma in Fukien is Melania peregrinorum Heude inhabiting the mountain stream among rocks and under stones.The sporocyst stage was not discovered in natural infection. The second generation redia measures 1.39mm in length and 0.274mm in width. The gut contains numerous brownish granules derived from the host tissue. The general shape of the redia is sac-like. It possesses no muscular feet. In the body of a mature redia there are 5 or 6 cercariae and some germ-balls observed.The cercariaeum is a comparatively large distomate larva 0.3-0.37mm in length and 0.11-0.13mm in width. It is brownish yellow ia color especially in its posterior part. The cuticle is covered with spines distributed in transverse rows. The oral sucker measures 0.08-0.09mm by 0.09-0.097mm in diameter. The ventral sucker is smaller, measurihg 0.068 in diameter. On the dorsal wall of the oral sucker there are four rows of short conspicuous spines lining two-thirds of the inner surface of the sucker. There are also 3-8 big flat spines attached to the inner surface. The acetabulum is also armed with small conspicuous spines on its entire inner surface, Such spinulation is not present in the cercariaeum of A. japonica but is rather similar to that described in Cercariaeum squamosum by Deblock, Carpron and Biguet (1957). The oral sucker is followed by a short prepharynx, which leads to a globular pharynx. The esophagus is long, bending several times and bifurcating in front the acetabulum into two intestinal caeca. On both sides of the esophagus four bundles of penetration glands are present, occupying the area between the pharynx and acetabulum. There are altogether 40-42 unicellular gland cells. Four bundles of ducts proceed anteriorward along the medial and lateral regions to arrive at and open on the inner dorsal wall of the oral sucker. The penetration glands become graduallv diminished as the cercariaeum grows more mature, so that in the adolescaria stage their contents are greatly reduced. The posterior tip of the body is armed with a number of long and sharp spines, which probably help the larva in its creeping movement.The excretory system is complicated. Since the body of the cercariaeum is full of cystogenous cells, which obscure the capillary tubules connecting the flame cells, their arrangement cannot be traced, and yet when the cercariaeum has encysted, while still in the snail host, most of the gland cells have disappeared rendering the tiny excretory tubules observable. The excretory bladder is a sinuous tube, making one or two left and right bendings as it advances anteriorward. The bladder is lined with a series of large epithelial cells. From the anterior aspect of the bladder, there arise two collecting tubules, which extend obliquely foreward to both lateral fields. They continue to advance to the level of esophagus and then turn posteriorly to about the mid region of the whole length of the collecting tubule and divides into two branches. The anterior branch gives off branches two times resulting in three groups of solenocytes. The first group consists of five cells, while the other two have three calls cach. The posterior branch divides into two main sub-branches with seven and three flame cells in each group. The total number of flame cells is about 42. The pattern of their arrangement can be better understood by tracing the development of the excretory system from the germ-ball to the mature cercaria. Four stages were observed:1. In the early germ-ball stage, when the oral sucker and the phraynx are being differentiated, the collecting tubulesare formed. They are connected to a small bladder situated at the posterior end of the body. The two tubules having passcd anteriorly and reached about two-thirds of the body length, make a characteristic loop and divide into an anterior and a posterior branch Their arrangement can be depicted as 2(1+1)=4. 2. In the second stage, when the ventral sucker is formed, both the anterior and posterior branches divide into three flame cells cach. The formula is reprsented as 2(3+3)=12.3. In the third stage the division of the anterior branch into three smaller branches is witnessed. The posterior branch is not subdivided. It still possesses three solenocytes. The formula of arrangement is 2[(2+2+4)+(2+1)]=22.4. The fourth or the cercaria stage shows great increase of cells, especially in the posterior branch. Their arrangement are indicated in the foregoing description. The formula can be expressed as follows: 2[(3+3+5)+(3+3+4)]=42.It was observed that the number of cells and the pattern of their arrangement are not exactly homologous between the left and right sides of the body. The above description indicates that the cell formula is constant only in relative sense that is they differ in different stages of development.Specimens of Asymphylodora japonica were secured from Pscudorasbora parva (Temm. aud Schle.) and also from Cyprinus carpio L. The structure and measurements of the adult are fully described. They resemble the original description of Yamaguti's closely. A. japonica develops in Parafossarulus eximius (Frauenfeld) and P. striatulus (Benson). Both molluscs inhabit the ponds and rivulets in Foochow area. Dissections of the snails reveal stages of rediae and cercariae. Spororcysts were not found in the natural infection. The second generation redia is elongated in shapeIt measures 1.5mm in length and 0.45mm in transverse diameter. The fully mature redia contains seven to eight cercariae in its body.The cercariaeum is elongated or spindle-shaped, measuring 0.5-056mm in length and 0.16mm in greatest width. The cuticle is armed with spines transversely arranged. Oral sucker is round in shape with a diameter of 0.1mm. Ventral sucker, larger than the oral sucker, has a diameter of 0.12-0.13mm. There is a short prepharynx followed by a glubose pharynx. The esophagus is long. It bifurcates in front of the acetabulum into two intestinal caeca, which extend posteriorly to one fourth of the body length from the hind extremity. Four groups of unicellular penetration glands occupy the region between the oral and ventral suckers, numbering altogether about 36-38. Four bundles of gland-ducts lead forward and open on the inner dorsal wall of the oral sucker. The excretory system resembles that of cercariaeum of A. macrostoma. The excretory bladder is a long sinuous tube, similar to that of cercariaeum A. macrostoma.The metacercariae of A. japonica, probably in the pre-encystment stage, were frequently encountered in the snail host. It is larger in size than the cercariaeum, measuring 0.8-1.00mm in length and 0.4mm in greatest width, Oral sucker 0.038-0.11mm in diameter, is smaller than acetabulum, The later is 0.132-0.149 mm in diamcter. The oral sucker is smaller than acetabulum. The later is 0.132-0.149 mm in diam- eter. The oral sucker is followed by a prepharynx, which is connected to a glubose pharynx 0.049-0.50mm in diameter. The esophagus is long It bifurcates before the ventral sucker into two intestinal caeca extending to the hind end of the testis. The genital organs alrsady begin to develop. A single oval testis, measuring 0.30 by 0.20mm is situated at the posterior part of the body. Immediately anterior to the testis, an ovary triangular or oval in shape is present. Its diameter is 0.10mm. On the right side of the acetabulum the primordium of the cirrus pouch and metraterm appear as two columns of nuclei. The metacercariae can encyst in the same snail host. They can also migrate to another snail of the same species. The cyst measures 0.332-0.365mm in diameter. Under cover-glass pressure, it measures 0.500mm in diameter.Experiments were performed to infect Puntia sp., secured from places where no Melanin snails were found, and members of which were found to be free from infection, by feeding them with from Melanin peregrinorum. Fifteen days after infection, the fishes were dissected and adult worms similar to A. macrostoma were found. One experimentally infected fish died five days after infection wite forth immaure worms found. They were all very similar in size and development. Experiments were also performed to secure adult A. japonica by feeding laboratory-reared gold fishes (Carassius auratus) with cysts from Parafossarulus exiraius (F.) Fifteen days after infection, adult wo

1.福建省的两种側殖吸虫,巨口侧殖吸虫(Asymphylodora macrostoma Ozaki,1925)及日本侧殖吸虫(A. japonica Yamaguti,1928)的生活史均經闡明。2.巨口侧殖吸虫的终末宿主为刺鲃(Punctius sp.),貝类的中間宿主为川蜷贝(Melania peregrinorum Heude)。日本侧殖吸虫的终末宿主为麦穗魚(Pseudorasbora parva (T. and S.)),及鯉魚(Cyprinus carpio L.),貝类中間宿主为两种的纹沼螺(Parafossarulus eximius (Fruenfeld)及P. striatulus (Benson))。3.幼虫各期的形态經观察和叙述,特別关于排泄系統的构造經詳細的探討。4.两种侧殖吸虫幼虫期的形态,特别关于排泄囊的构造以及穿刺腺的存在,与侧殖Asymphylodora Looss,1899原属有很大的不同,作者建議创立一个新属Orientotrema Tang,1962 Gen. Nov.借以容納有管状排泄囊的种类。属的特征經叙述,末后并附侧殖亚科(Asymphylodorinae)各属...

1.福建省的两种側殖吸虫,巨口侧殖吸虫(Asymphylodora macrostoma Ozaki,1925)及日本侧殖吸虫(A. japonica Yamaguti,1928)的生活史均經闡明。2.巨口侧殖吸虫的终末宿主为刺鲃(Punctius sp.),貝类的中間宿主为川蜷贝(Melania peregrinorum Heude)。日本侧殖吸虫的终末宿主为麦穗魚(Pseudorasbora parva (T. and S.)),及鯉魚(Cyprinus carpio L.),貝类中間宿主为两种的纹沼螺(Parafossarulus eximius (Fruenfeld)及P. striatulus (Benson))。3.幼虫各期的形态經观察和叙述,特別关于排泄系統的构造經詳細的探討。4.两种侧殖吸虫幼虫期的形态,特别关于排泄囊的构造以及穿刺腺的存在,与侧殖Asymphylodora Looss,1899原属有很大的不同,作者建議创立一个新属Orientotrema Tang,1962 Gen. Nov.借以容納有管状排泄囊的种类。属的特征經叙述,末后并附侧殖亚科(Asymphylodorinae)各属檢索表的修訂。5.本类吸虫的生活史及习性問题經詳細討論。

 
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