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one-mass
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  一惯性
     Online identification methods were developed based on model reference adaptive system (MRAS) for one -mass and two -mass systems.
     研究了基于模型参考自适应算法的一惯性系统及二惯性系统机械参数的辨识方法 ,并研究了自适应增益对辨识结果的影响。
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  “one-mass”译为未确定词的双语例句
     Only in the one-mass Hamiltonian system Lyapunov exponent equals to the eigenvalue. For Hamilton systems under small disturbance Melnikov method may be used to determine whether the chaotic motions will happen in the system.
     对于周期性小扰动作用下的Hamilton系统,可应用Melnikov方法分析其混沌运动,本文讨论了该方法在电力系统中的应用,强调指出对于两自由度系统与两自由度以上的系统其混沌运动有着本质不同的表现。
短句来源
     1. The one-mass dynamics model and two-mass dynamics model is studied. Differential equation is set up, write the program and calculate the model in Visual C++ language.
     1.分析单质量模型和二质量模型,建立微分方程组,利用Visual C++软件进行编程计算。
短句来源
     2) We have founded the one-mass dynamic model, after giving all the value of the parameters and applying Runge-Kutta method to solve the problem, we have acquired the valve's displacement, velocity and acceleration in one cycle of the engine, and its dynamic load curve by further solution.
     2)接着运用动力学分析的方法建立配气机构单质量模型,通过建立微分方程式、输入原始数据、编程和应用龙格库塔(Runge-Kutta)法等求解得到气门在运转周期内的位移、速度和加速度曲线,从而进一步求解得到气门动载荷曲线。
短句来源
     A 170F diesel valve train was taken as example,one-mass,two-mass and four-mass models were built and the valve dynamic characteristics experiment was also carried out accordingly.
     以170F柴油机为例,建立单质量、二质量和四质量三种配气机构动力学模型,并相应进行气门动态特性试验研究.
短句来源
     Compared with one-mass and four-mass models,two-mass model is simpler and more rational, and its result accords well with experimental result.
     与单质量和四质量模型相比,二质量模型结构合理,计算稳定性好,计算结果与试验更加吻合.
短句来源
  相似匹配句对
     One is R.
     研究结果表明,危害贵州省小麦的病原丝核菌至少有两种,一种是R.
短句来源
     One of the 5 E.
     分离的E .
短句来源
     One-Sentence News
     一句话新闻
短句来源
     On One-sided Accomplice
     论片面共犯
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     Mass.
     Mass .
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The marine alga which is called "Ci-wei-dong" in our country has long been passed among us under the name Hypnea musciformis (Wulf.) Lamouroux since it was identified to that species by previous algologist.Tanaka (1941) established a new species Hypnea japonica Tanaka, which was rather closely related to H. musciformis. He noted that "This new species has some resemblance to H. musciformis (Wulf.) Lamouroux, but it is large and cartilaginous, while in H. musciformis (Wulf.) Lamouroux the frond is membranaceous...

The marine alga which is called "Ci-wei-dong" in our country has long been passed among us under the name Hypnea musciformis (Wulf.) Lamouroux since it was identified to that species by previous algologist.Tanaka (1941) established a new species Hypnea japonica Tanaka, which was rather closely related to H. musciformis. He noted that "This new species has some resemblance to H. musciformis (Wulf.) Lamouroux, but it is large and cartilaginous, while in H. musciformis (Wulf.) Lamouroux the frond is membranaceous and slender." Our study shows that, the above mentioned characteristic is very variable, hence unreliable. Very fortunately, many foreign specimens from various sources (see Table 1) deposited in the Herbarium of the Institute of Oceanology, Academia Sinica were available for our study, thus rendering the present study possible.The writers were at first tempted to refer H. japonica as a variety of H. musciformis. Later, after a thorough of all specimens, we found a difference between the two related species in the position of the tetrasporangia. In H. musciformis, tetrasporangia are scattered over the swollen portions in the upper and middle parts of tetrasporic branch, or in very rare cases, they are scattered over the swollen portions at the lower part of tetrasporic branch. In H. japonica, tetrasporangia scattered over swollen portions at or near the lower part of tetrasporic branch. This constant characteristic bears important taxonomic significance, and offers a reliable characteristic for separating H. japonica from H. musciformis.After reexamination of the Chinese and foreign specimens on the basis of the above discussed characteristic, we have come to the conclusion that specimens of R. E. Vaughan's No. 988 (Mauritius), F. Thivy (two sheets, without collective number from India), C. K. Tseng's No. 3174 (Woods Hole, U.S.A.), C. Messina's No. 188 (Florida, U.S.A.), W. R. Taylor's No. 620 (Florida, U.S.A.) and a. numberless one (Mass., U.S.A.), H. H. Bartlett's No. 17835, No. 17894, No. 17957, No. 17964 and No. 17995 (Haiti) are referable to H. musciformis and specimens collected from China, Japan, Viet Nam, Philippines (except A. N. Benemerito's No. 248) and Indonesia are referable to H. japonica. Specimens of Hong Kong are referable to H. japonica too. A N. Bernemerito's No. 248 is clearly not either of them.In the present paper, discussion has been devoted to the geographical distribution of H. musciformis and H. japonica.

1.钩沙菜Hypnea musciformis是广布于世界温暖水域中的种类,各地的记录很多。日本藻类学家田中刚在“日本沙菜属的研究”一文中认为:著名的日本故藻类学家冈村金太郎以前报导的日本产的钩沙菜与世界其他各地产的不同,因而建立了另一新种,命名为H.japonica,中文学名称作冻沙菜。 2.冻沙菜创立后,除日本外,世界其他各地迄今没有任何报导,在田中建立冻沙菜这一新种前,我国广东省和香港地区也有钩沙菜的记录。解放以后,我所的工作同志曾采到大量的本种标本。为了正确 地鉴定这些标本的学名,我们参考了我所海洋植物标本室收藏的产于世界各地并被许多著名藻类学家所鉴定的钩沙菜标本。经过全面比较研究后,我们感到田中在建种时所提到的作为两种间区别特点的体形和体质,在世界各地产的被命名为钩沙菜的标本中存在着与冻沙菜之间的中间类型。最初,我们曾怀疑冻沙菜是否是一个独立种,但经仔细比较后,发现钩沙菜的四分孢子囊一般都集生在孢囊枝的中部或上部,在极少数情况下偶有下延的;而冻沙菜则极其规律地只集生在孢囊枝的下部或稍向中部延伸。因此,四分孢子囊集生在孢囊枝上的位置可作为两种间区别的主要特征。 3.根据两种间的主要区别特征,我们对国内...

1.钩沙菜Hypnea musciformis是广布于世界温暖水域中的种类,各地的记录很多。日本藻类学家田中刚在“日本沙菜属的研究”一文中认为:著名的日本故藻类学家冈村金太郎以前报导的日本产的钩沙菜与世界其他各地产的不同,因而建立了另一新种,命名为H.japonica,中文学名称作冻沙菜。 2.冻沙菜创立后,除日本外,世界其他各地迄今没有任何报导,在田中建立冻沙菜这一新种前,我国广东省和香港地区也有钩沙菜的记录。解放以后,我所的工作同志曾采到大量的本种标本。为了正确 地鉴定这些标本的学名,我们参考了我所海洋植物标本室收藏的产于世界各地并被许多著名藻类学家所鉴定的钩沙菜标本。经过全面比较研究后,我们感到田中在建种时所提到的作为两种间区别特点的体形和体质,在世界各地产的被命名为钩沙菜的标本中存在着与冻沙菜之间的中间类型。最初,我们曾怀疑冻沙菜是否是一个独立种,但经仔细比较后,发现钩沙菜的四分孢子囊一般都集生在孢囊枝的中部或上部,在极少数情况下偶有下延的;而冻沙菜则极其规律地只集生在孢囊枝的下部或稍向中部延伸。因此,四分孢子囊集生在孢囊枝上的位置可作为两种间区别的主要特征。 3.根据两种间的主要区别特征,我们对国内外定名为钩沙菜的标本进行了重新鉴定,更正了一些国内外定名?

In sample preparation four spikes (149Sm, 116Nd, 84Sr, 87Rb) were put into the sample.After dissolution and separation, the solutions of Sm, Nd, Sr and Rb could be obtained, respectively. The isotopic compositions and concentrations were measured in one mass spec-trometric analysis using the computer program edited by us. In order to enhance the sensiti-vity of Nd+ analysis with a single filament, an emission reagent was developed.The measured value for La Jolla Nd standard is 145Nd/144Nd = 0.511845± 0.000006(2a)...

In sample preparation four spikes (149Sm, 116Nd, 84Sr, 87Rb) were put into the sample.After dissolution and separation, the solutions of Sm, Nd, Sr and Rb could be obtained, respectively. The isotopic compositions and concentrations were measured in one mass spec-trometric analysis using the computer program edited by us. In order to enhance the sensiti-vity of Nd+ analysis with a single filament, an emission reagent was developed.The measured value for La Jolla Nd standard is 145Nd/144Nd = 0.511845± 0.000006(2a) which is very close to that obtained by Lugmair. NBS987 was measured with 87Sr/86Sr = 0.710221 ±0.000003.The developed Sm-Nd technique has been used to study the origin of granites and the che-mical heterogenity of subcontinental mantle in eastern and southwestern China.Several Sm-Nd isochrons for the Archean restites in tonalites from Shanxi Province and the Precambrian metavolcanics and ultramafic rocks from Yunnan and Shandong provinces were also measured, respectively.

本文介绍了Sm-Nd法的制样特点与技术改进。我们研究配制的Nd~+发射剂及新编计算机程序,实现了高产额Nd~+的单铼带同位素分析。本方法已应用了研究对中国大陆地幔的化学不均匀性,花岗岩的成因和年龄测定,并将对年龄数据及示踪应用方面取得的若干新成果进行了简要讨论。

During 1985-1987, 184 of 401 pigeon (46%) were found to be infected with Haemopro-teus columbae by blood examination. Meantime, a study on the development of schizogony and sporogony of this parasite was also carried out under laboratory condition. The louse fly, Lynchia maura, acted as the insect host was naturally and experimentally proved. Our investigation showed that the sexual stages consisting of gamete, zygote, ookinete, oocyst and sporo-zoite developed and grew out in the mid-gut, haemocoel and salivary...

During 1985-1987, 184 of 401 pigeon (46%) were found to be infected with Haemopro-teus columbae by blood examination. Meantime, a study on the development of schizogony and sporogony of this parasite was also carried out under laboratory condition. The louse fly, Lynchia maura, acted as the insect host was naturally and experimentally proved. Our investigation showed that the sexual stages consisting of gamete, zygote, ookinete, oocyst and sporo-zoite developed and grew out in the mid-gut, haemocoel and salivary gland of the fly, and the development of sporogony was completed within 10 days after infection. As the microgame-tocyte became extracellular, its nucleus repeatedly divided into 4-8 daughter nuclei and then formed as 4-8 flagellated microgametes. The exflagellation was completely taken place in the mid-gut within 12 hours after infection. By 12-24 hours, the elongated ookinete was found from the stomach smear. 10 days after infection, the mature oocyst could be obtained in the mid-gut of the louse fly, with more than 50 sporozoites and one mass of residual body. They finally broke out of the oocyst in the mid-gut and entered the salivary gland.As shown by our experiment, the development of asexual stages from sporozoite to game-tocyte in pigeon reqired 28-30 days after infection. There was no erythrocytic schizogony which is the chief distinction from that of Plasmodium. The schizonts were mainly found in the endothelial cells and leucocytes of the lung tissue. The tissue sections showed that the early oval schizonts were present in the monocytes of lung tissue 8 days after infection. By 14 days, the endothelial cells of lung tissue revealed many different stages of growing schizonts, some of their nuclei had divided into daughter nuclei and some into cytomeres. The mature schizont containing merozoites was obtained in the lung tissue 28 days after infection, and they appeared with polymorphism such as oval form, globular shape or Iobed body. By 30 days, the majority of mature gametocytes had developed in the host erythrocytes.In addition, a few of feather louse, Columbicola columbae, were also found to be infected with oocysts and sporozoites in the mid-gut smear. They seemed to be closely related to those of H. columbae. The feather louse served as an insect vector had not been confirmed so far, and the question would be worth for future study. There was no diurnal periodicity of ga-metocytc numbers in the peripheral blood by means of blood examination. The authors consider that this status probably coincides with the activity of insect host sucking blood all the day.

本文首次报告我国鸽血变虫的生活史。自然和人工感染实验证明虱蝇是其昆虫媒介。本虫的配子体进入虱蝇体内6—10天后完成孢子有性增殖。 实验观察了本虫在鸽体内无性增殖期的形态、部位及在末梢血液中配子体的发育过程,并证明其潜隐期(prepatent period)为28—30天。 本工作亦对羽虱体腔中的卵囊和子孢子作了描述,提示羽虱也可能是本虫的媒介昆虫,有待今后研究证实。

 
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