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exam
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  考试
     ANALYSIS OF THE STUDENTS'SUCCESSFUL EXAM RESULTS——A CROSS-CULTURAL STUDY OF ATTRIBUTIONAL THEORY
     学生考试成功结果的归因分析——归因理论的跨文化研究
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     An Analysis of Exam Questions of 26 Examinations in Courses and Their Qualities
     26门次课程试题及考试质量分析
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     The Management Information System on Exam Evaluation
     考试评估管理信息系统
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     The MIS on Exam Evaluation in Teaching Summary
     教学总结性考试评估管理信息系统
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     (2)The rank of school and grade had significant influence on exam activity, learning passion and learning persistence.
     ②学校级别、年级对学生的考试积极性、学习热情、学习毅力影响显著;
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  “exam”译为未确定词的双语例句
     A Design of Intelligent Generation System of Physics Exam Paper
     试题库智能组卷系统的一种设计──工科大学物理试题库智能组卷(Ⅱ)
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     Diagnostic Significance of TCM Tongue Diagnosis in Contrast with Enteroskopic Exam in Lower GI Tract Diseases
     中医舌诊与肠镜对照在下消化道疾病诊断中的意义
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     Results of Exam,for National Awards in Sci.&Tech,1995 Unveiled
     1995年国家科技奖评审揭晓
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     THE DESIGN CONCERNING THE PLAN FOR PACKING LOCKS INTO A BOX——The maths model of Exam Paper B of te maths contest of founding models of all the college students of our country in 1994
     关于锁具装箱的方案设计——1994年全国大学生数学建模竞赛B题的数学模型
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     Study on generation system of exam papers by mechanical drawing
     “机械制图”试卷生成系统的研究
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     The Exam
     《考试》
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     Exam-Management in College
     论高校的考试管理
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  exam
Change of symmetry and rotation of thermal field as a new method of control of heat and mass transfer in crystal growth (by exam
      
This paper presents a new practical bit commitment scheme based on Schnorr's one-time knowledge proof scheme, where the use of cut-and-choose method and many random exam candidates in the protocols are replaced by a single challenge number.
      
As the patient's symptoms did not cease in spite of pain medication, d-dimer testing was initiated which was elevated in the next laboratory exam.
      
Those alive in September 1999 were referred for a standardized dermatological exam (n=156) which detected malignancy in 28 patients being transplanted for 4.98 years on average.
      
Methods: Northern and western blot were performed to exam the Smad7 and TGF-β1 expression abundance in BEP2D and BERP35T-2 at both transcription and translation level.
      
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Concrete is currently used in larger quantities than any other man-made constructionmaterials and may be even more useful in the expectant future. Among the present trends in the development of concrete science and technology, highstrength with reduced weight deserves major consideration. After reviewing the history ofconcrete research, this paper suggests that the pore-gradation study may bring about a newbreakthrough in concrete science. As the pores of different sizes have different effects onthe physico-mechanical...

Concrete is currently used in larger quantities than any other man-made constructionmaterials and may be even more useful in the expectant future. Among the present trends in the development of concrete science and technology, highstrength with reduced weight deserves major consideration. After reviewing the history ofconcrete research, this paper suggests that the pore-gradation study may bring about a newbreakthrough in concrete science. As the pores of different sizes have different effects onthe physico-mechanical properties of concrete, the betterment of pore gradation will improveits strength and other related properties. The condition for high-strength concrete withreduced weight may be expressed as follows: ∑ e_1=max ∑ e_1x_1=min Where e_1——porosity of the ith grade pore, x_1——it's influencing coefficient. The betterment of pore gradation will be accomplished by several methods, for exam-ple, by adding effective admixtures, by restraining expansion, by impregnating polymer,etc. After solving the problems of brittleness of high-strength concrete and stability of stru-cture with reduced sections, the prospective composite materials based on super-strengthconcrete (f'_c>1000 kg/cm~2) and reinforcements (f'_s>20000 kg/cm~2) will make a new epoch inbuilding science.

混凝土是最大宗的人造材料,应用范围不断扩大。近期内混凝土科学技术的发展方向,首先是高强与高强轻质。本文在回顾混凝土研究的历史后建议在混凝土孔级配方面来一个突破。由于不同大小的孔对混凝土强度与有关的物理力学性能有着不同的影响,改善孔级配将显著地提高强度等性能,如能满足下列条件,就可能达到高强轻质的目的; ∑e_i=最大 ∑e_ix_i=最小式中e_i为第i孔级的分孔隙率,x_i为i孔级的强度影响系数。 可用几种方法来改善孔级配,例如加入高效外加剂、限制膨胀、聚合物浸渍等。 在研究解决了高强混凝土的脆性问题和减小截面后结构物的稳定性问题之后,用超高强混凝土(强度大于1000公斤/厘米~2)与高强钢筋(强度大于20000公斤/厘米~2)制造的组合材料将为建筑科学技术开辟广阔的前途。

In order to solve the problem of dynamic adjustment of repeating leveling nets covering a vast area,several adjustment programmes are suggested.By way of calculating exam- ples,these programmes are analyzed and compared in respect to the average error of adjusted differences of heights and velocity values,as well as the efficiencies of conver- gence of calculation.In this way,a rigorous method——the progressive approximation adjustment of the velocity value and the difference of heights——is suggested,which...

In order to solve the problem of dynamic adjustment of repeating leveling nets covering a vast area,several adjustment programmes are suggested.By way of calculating exam- ples,these programmes are analyzed and compared in respect to the average error of adjusted differences of heights and velocity values,as well as the efficiencies of conver- gence of calculation.In this way,a rigorous method——the progressive approximation adjustment of the velocity value and the difference of heights——is suggested,which may suit well the condition of our country. Since the difference of heights used in the adjustment may come from the levellings of different orders,the question of reasonable weighting of observations is thus emphati- cally discussed,and a method of weight determination is proposed.Besides,according to the result of the calculating example,a discussion is made about how to determine the mean year of the different observation periods and how to choose the leveling lines.A formula of weight reciprocal of the adjusted velocity value is also given in order to calculate the mean error of the adjusted velocity value of some bench marks.

为了解决大规模复测水准网的动态平差问题,本文拟定了若干平差方案。通过实例计算,根据平差后高差和速率的平均误差、计算的收敛速度等,对各种平差方案进行了分析和比较,从而提出适合于我国情况的严密平差方法——“速率高差逐次平差法”由于参加平差的高差可能是采用不同等级的观测成果,因此,本文着重计论了平差时如何合理定权的问题,提出了有关定权的建议。此外,根据实例计算的结果,讨论了有关中心年代的选取以及观测路线的取舍等问题。为了计算某些点平差后速率的中误差,本文还给出了评定平差后速率值的权倒数公式。

Tubes of 1hc primary reformer furnace of an ammonia plant were exam- inated through dye penetrate; macro and micrometall-ographic; microhardness and micro-probe tests. The results ofs the examinations show that after 20000 hrs of operation at 500℃, the carbons of the 1(1/4)Cr(1/2)Mo Stecl diffused from heat affected zone to the welded fusion boundaryl the 1(1/4)Cr(1/2)Mo Stee1 side of the welded fusion boundary was decarburized and a thin shell-like brittle carbide was precipitated along the fusion boundary...

Tubes of 1hc primary reformer furnace of an ammonia plant were exam- inated through dye penetrate; macro and micrometall-ographic; microhardness and micro-probe tests. The results ofs the examinations show that after 20000 hrs of operation at 500℃, the carbons of the 1(1/4)Cr(1/2)Mo Stecl diffused from heat affected zone to the welded fusion boundaryl the 1(1/4)Cr(1/2)Mo Stee1 side of the welded fusion boundary was decarburized and a thin shell-like brittle carbide was precipitated along the fusion boundary of the welding seam; the hardness of the welded fusion zone was incrcased. Theseare the reason of the brittle cracks along the welded fusion zone. Cracks started from the root of the welding seam.

本文利用着色探伤、低倍检验、金相分析、显微硬度及电子探针等方法,分析了某化肥厂一段转化炉炉管沿异种纲焊接融合区的爆裂事故。研究结果表明:4Cr25Ni20钢与1(1/4)Cr(1/2)Mo钢焊接融合区,在500℃左右, 近20000小时的运行中,1(1/4)Cr(1/2)Mo钢接近融合线部位,由于碳向焊缝扩散而发 生脱碳现象,沿异种钢的融合线折出薄壳状脆性碳化物相,融合区硬度升高,这是导 致融合区韧性下降,引起炉管沿融合线断裂的主要原因。

 
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