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阻力     
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  resistance
    Research on the Method and Calculation of the New Slender-Ship Wave Resistance Theory
    船舶兴波阻力新细长船理论的方法与计算研究
短句来源
    On Resistance Estimate of Round Bottom Crafts by the Regression Analysis Method
    应用回归分析方法估算圆舭艇阻力
短句来源
    The Effects of Parallel Middle Body Length on Resistance of Full Ship Forms
    平行中体长度对丰满船型阻力的影响
短句来源
    Prediction of Full-scale Ship Resistance by Viscous Resistance Coefficient of Equivalent Bodies of Revolution
    用等价回转体粘性阻力系数预报实船阻力
短句来源
    A PRELIMINARY METHOD FOR ESTIMATING SHIP RESISTANCE IN SHALLOW WATER
    关于船舶浅水阻力估算方法的探讨
短句来源
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  drag
    Optimum Shaping Design of Axisymmetric Bodies for Minimum Drag
    回转体最小阻力外形优化设计
短句来源
    Calculation of Microbubble Sheet Drag Reduction of Plate by Model of Boundary Layer
    利用微气泡层减少平板阻力的边界层模型计算(英文)
短句来源
    Problems in drag measuring test of non-streamlined underwater body
    非流线型水下航行体阻力测量试验中的几个问题
短句来源
    Drag reduction tests and wall concentration mea-surment for a 3.0m long flat plate and a 5.463m long body of revolution with polymer slot injection were carried out with Reynolds numbers in the range of 3.0× 106 to 5.4× 107. The maximum frictional drag reduction obtained are 45 percent and 39 percent repectively.
    对于长为3.0米的平板和5.463米的回转体,在Reynolds数为3.0×10~6~5.4×10~7范围内进行了缝喷降阻聚合物溶液的阻力试验和壁面浓度的测量,所获得的最大摩阻降低率分别为45%和39%。
短句来源
    Based on the measurements of the surface fluctuating pressure, this paper gives the fluctuating lift and drag of an isolated circular cylinder and two tandem elastic ones with the same diameter at high Reynolds numbers (4.19×104
    本文通过实验测量柱表面的脉动压力,获得了在高雷诺数范围中(4.19×104<Re<5.77×105)串列弹性双圆柱体(2.5<L/D<5.02)及孤立弹性圆柱体在均匀流场中的脉动升力和阻力
短句来源
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  resistance of
    The Effects of Parallel Middle Body Length on Resistance of Full Ship Forms
    平行中体长度对丰满船型阻力的影响
短句来源
    Estimation Formula for Resistance of Sled-type Semi-integrated Barges And Its Regression Method
    雪橇型半分节驳阻力估算公式及其回归方法
短句来源
    Calculation of Wave Resistance of High Speed Ships with Transom Stern
    《高速方尾船型的兴波阻力数值计算》
短句来源
    SCALE EFFECT FOR SHAFT APPENDAGE RESISTANCE OF TWIN-SCREW VESSEL LUCY ASHTON
    双桨船Lucy Ashton轴系附体阻力的尺度效应
短句来源
    A PREDICTION METHOD OF STILL WATER RESISTANCE OF PLANING BOATS
    滑行艇静水阻力的估算方法
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  resistance and
    Effect of Bulbous Bow on Resistance and Motion of Fishing Vessels
    球鼻首对渔船阻力和运动的影响
短句来源
    Effects of Slightly Reduced Afterbody Block Coefficient with Attached Bulbous Bow on Resistance and Propulsion of large Full Ships
    略减后体方形系数并加装球鼻首对肥大船阻力和推进的影响
短句来源
    ON RESISTANCE AND INTERFERENCE OF WAVE SYSTEMS OF HIGH-SPEED CATAMARAN
    高速双体船模型阻力试验及片体间波系干扰分析
短句来源
    Test and Study on Resistance and Wavemaking Characteristics of High Speed Catamaran
    高速双体船阻力和兴波特性的试验研究
短句来源
    Experimental Investigation on Resistance and Seakeeping Performance for High Speed Channel Crafts
    高速槽道艇阻力及耐波性能试验研究
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      resistance
    Alcohol abuse is thought to be a risk factor for the cause of liver damage, hyperlipidemia and insulin resistance.
          
    This paper summarizes the results from molecular modeling of various multidrug resistance (MDR) modulators and the MDR protein P-glycoprotein (P-gp).
          
    This paper is devoted to studying a free boundary problem modeling the effects of drug resistance and vasculature on the response of solid tumors to therapy.
          
    Their structures were characterized by an infrared (IR) spectrum and their thermal resistance was conducted with thermal gravity (TG) and differential scanning calorimetry (DSC).
          
    Effects of relative content of HTPB and PPG on emulsion stability, resistance to water and ethanol, thermal stability, compatibility of soft and hard segment, as well as the mechanical property of the cured film were investigated.
          
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      drag
    Formation of a cross-linking complex of dinitrogenase reductase-activating glycohydrolase (DRAG) with membrane proteins from Rho
          
    Association of dinitrogenase reductase-activating glycohydrolase (DRAG) with membrane proteins of chromatophores has been investigated.
          
    Complex formation was observed both in native chromatophore membrane and in chromatophores treated with 0.5 M NaCl in the presence of homogeneous DRAG and glutaraldehyde in cross-reaction.
          
    The molecular weight of the complex was around 200 kD, which is consistent with the association of DRAG with three or more chromatophore membrane proteins.
          
    It was demonstrated that ammonium transport protein and P11 protein are possible candidates for association with DRAG in chromatophore membranes.
          
    更多          
      resistance of
    The resistances of the different sub-regions are combined to calculate the resistance of the entire region.
          
    The mechanism of AM fungi in enhancing drought resistance of host plants ascribed to greater osmotic adjustment and greater absorption area of root system by AM colonization.
          
    The antiswelling efficiency, resistance of water absorption, oxygen index and hardness of the composites were measured.
          
    β-pinene plays an important role in inducing the insect resistance of P.
          
    Drought resistance of these transgenic lines was evaluated by water stress trials in a greenhouse.
          
    更多          
      resistance and
    This paper is devoted to studying a free boundary problem modeling the effects of drug resistance and vasculature on the response of solid tumors to therapy.
          
    Results show that all of the modifiers reduced water absorption of poplar wood and enhanced flame resistance and hardness.
          
    The results indicate that undisturbed soils have higher shear resistance and less shear displacement than remolded soils at the same vertical loading, when both soils have the same dry density and water content under the same vegetations.
          
    Although these three shrubs had different mechanisms in response to drought stress, they all had higher drought resistance and could adapt to the drought condition on the Loess Plateau.
          
    Analysis on virus resistance and fruit quality for T4 generation of transgenic papaya
          
    更多          


    In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided...

    In order to approach the world level of shipbuilding,science within twelve years,it is necessary to survey the recent development in shipbuilding research of some leading maritime countries.This paper starts with stating the achievments of shipbuilding research work in this himdred years and steps taken by some leading countries for further development after the World War Ⅱ.Then it goes on to discuss the main achievments in the field of ship hydrodynamics and ship strength in recent years,and these are subdivided into the following headings: Ship hydrodynamics:(1)Systematic model testing.(2)Model-ship co-relalion, (3)Theory of wave making resistance,(4) Systematic testing of model propellers, (5)Propeller theory,(6)Cavitation,erosion,Singing of propellers,(7)Ship motion and seakeeping quality. Strength of ships: (1) Strength testing of actual ships and stress measure- ments on sea way,(2)Strength testing in model tank,(3)Problem of long superstructure,(4) Elastic and plastic strength of ship plating,(5) Ship vibration, (6) Materials for ship construction. This paper also gives an account of the preliminary achievments of the Chinese shipbuilding research work in respective fields and expresses the opinion that a great deal of amount of work is left to be done for the Chinese naval architects.Finally,the paper suggests that China must redouble her effort to construct her main shipbuilding research base equiped with instruments and apparatus of highest quality and to train the research experts as quick as possible.

    为了在十二年内争取赶上世界的造船科学水平,就有必要对世界各国造船科学研究的发展,进行一番探讨。本文首先说明造船科学在百年来所起的作用,和二次世界大战后各国对造船科学研究的组织和发展。进一步探讨了二次大战后在船舶流体力学及船体强度学两方面的主要成就。并分以下几部份叙述: 船舶流体力学方面:(1)关于船型的系列试验;(2)关于船模与实船的换算关系;(3)兴波阻力理论;(4)推进器系列试验;(5)推进器理论;(6)推进器空泡、剥蚀、唱音等问题;(7)船舶运动和适航性。船体强度学方面:(1)实船强度试验和航行中应力测量;(2)船模试验池中的强度试验;(3)长上层建筑问题;(4)船体钢板的弹性塑性问题;(5)船体振动问题;(6)造船用材料问题。文中也涉及一些我国造船科学研究的初步收获,并说明我国在整个造船科学领域中还留着很大空白面。为了进一步发展我国的造船科学研究;建设主要的研究基地,充实仪表设备和培养研究人员是刻不容缓的事。

    During the recent years, the coastal shipping in our country becomes more and more increasing in accordance with the high tide of our economical construction, and hence, the study of coasters plays an important role in our research work.The paper gives results of experiments made with models of 5000-tons coasters. The forms of fore-body and aft-body, position of longitudinal centre of buoyancy, length, & breadth are systemmatically varied, with a view to investigate the influences of the individual factor on...

    During the recent years, the coastal shipping in our country becomes more and more increasing in accordance with the high tide of our economical construction, and hence, the study of coasters plays an important role in our research work.The paper gives results of experiments made with models of 5000-tons coasters. The forms of fore-body and aft-body, position of longitudinal centre of buoyancy, length, & breadth are systemmatically varied, with a view to investigate the influences of the individual factor on the resistance.Fifteen models are made. and the test results are all converted into EHP and ■400' curves. The ■400' curve of a similar foreign coaster which has been tested in the same tank is also given for comparison.

    本試驗以5000吨沿海货輪为对象,分別变更艏艉截面形状,纵浮心位置,长度和寬度,进行系列化船模阻力試驗,研究各不同因素对阻力的影响。文中除将试驗結果归納成实船有效馬力和(?)400’等各种图表外,並列入一艘类似尺度的国外5000吨貨輪的試驗資料,以資比較。对我国制訂标准船型的工作,将为一很好的参考。

    This paper emphasizes the importance of the resistance performance criterions, and on this basis deals and criticizes the different parameters of presentation commonly used formerly and now. According to the requirements of presentation parameters, recommend a proposal of parameters for resistance presentation.(?)~(?) is right and suitable both for designers and scientists, but the unnecessary constants 47π and 8π should be dropped, a better form is R/ρ/2▽~(2/3)V~2)~V/((g▽~(1/3))~(1/2)). As an example for explanation,...

    This paper emphasizes the importance of the resistance performance criterions, and on this basis deals and criticizes the different parameters of presentation commonly used formerly and now. According to the requirements of presentation parameters, recommend a proposal of parameters for resistance presentation.(?)~(?) is right and suitable both for designers and scientists, but the unnecessary constants 47π and 8π should be dropped, a better form is R/ρ/2▽~(2/3)V~2)~V/((g▽~(1/3))~(1/2)). As an example for explanation, choose 12 models data of ocean-going cargo ships with 3 kinds of parameters for plotting the curves, to see the uniformity of the order of their performance.

    本文强調割断阻力性能的基准的重要性,在此基础上敍述和批評以往和現在所常用的各种表达的参数。根据对於表达参数的要求,作出表达参数的建議。作者同意(C)~(k)的表达方法,认为对於設計师及科学工作者都是适用的,但应把其中4π及8π等不必要的数字免去,成为R/ρ/2▽2/3ν2~ν/g▽1/3~(1/2) 为了用具体例子来說明,选擇12艘远洋貨輪的船摸試驗結果,以三种相对应的参数来描繪曲綫,以示各船型优劣程序的一致性。

     
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