By shaping the wing with winglet,decrease the sum of induced drag and profile drag,increase span efficiency and lift-drag ratio.
采用Lagrange乘数优化方法,约束升力系数和机翼翼根弯矩,通过修改机翼+翼梢小翼组合体的结构外形,减小机翼的诱导阻力和形状阻力,提高机翼的展向效率和升阻比的大小。
According to the present experiment results,the precision of all calculation correlations for resistance factor in transition zone and laminar zone was compared.
根据已有的实验结果,分析比较了过渡区和层流区各种阻力系数模型计算的准确性,以及各流型之间过渡时的基本变化特征。
25 μm~2 by using an injecting procedure fresh water (TSD=729 mg/L)-gel-produced or fresh water with total volume injected >5 PV, the resistance factor, F__R, determined is in range 266.
用大庆采油二厂的污水(矿化度4013mg/L)配制不同HPAM浓度的Al3+交联聚合物凝胶,在气测渗透率1 25μm2的人造岩心上,按清水(矿化度729mg/L)—凝胶—污水或清水的注入程序,注入量>5PV,测得凝胶中HPAM浓度为0 6、0 5、0 4g/L时,残余阻力系数FRR(368 6～277 4)大于阻力系数FR(266 7～246 0),二者均随HPAM浓度减小而减小;后续注入清水时FRR较低;凝胶中HPAM浓度为0 3g/L时FRR
This paper has studied the convergence of iteration algorithm for colebrook s formula which has been used to determining the resistance factor about industrial pipes in three regions of turbulent flow resistance (i.
本文研究了适用于工业管道紊流三个阻力区（即光滑区、过渡区和粗糙区）阻力系数计算的柯列勃洛克公式迭代算法的收敛性，给出了收敛区间。
2D Interaction Models: Displacement Body, Transpiration. Form Drag, Stall Mechanisms.
17二维互动模式：位移物体，蒸散，形状阻力，失速机制。
Study on Mechanical Properties of Shape Memory Alloys Dampers;
形状记忆合金阻尼器的力学性能研究
The Research of Supercavitating Shape and Drag and Optimizing Cavitator Shape;
超空泡外形和阻力及空化器形状优化研究
Calculation of the Drag of Wings with Arbitrary Planform by Use of Network Method at Supersonic and Subsonic Speed
用网格法计算任意平面形状超、亚音速机翼阻力
DAMPING CAPACITY AND MECHANICAL PROPERTY OF NiTiNb SHAPE MEMORY ALLOYS
(NiTi)_(50-0．5x)Nb_x形状记忆合金的阻尼性能及力学性能
But extra wax can harden and form a blockage that interferes with sound waves and reduces hearing.
但剩余的耳蜡会变硬，并形成块状阻碍物，干扰声波，减弱听力。
Mechanics Model of a Kind of Novel Damper Based on SMA's Superelasticity
一种新型形状记忆合金超弹性阻尼器的力学模型
INFLUENCE OF DIFFERENT SOFTENING CURVES ON CRACK EXTENSION RESISTANCE CURVE G_R
不同软化曲线形状对裂缝扩展阻力G_R曲线的影响
The forms of thermistors are beads, probes, disks, and rods.
热敏电阻的形状有珠状、探针状、圆片状和柱状。
The Damping Capacity of TiNi Shape Memory Alloy and Its Ring Dampers;
TiNi形状记忆合金及其环阻尼器的阻尼性能研究
ability to recover quickly from setbacks; resilience.
从受阻状态下很快恢复的能力,弹力。
Study on Resistance Brazing Technology for TiNi Shape Memory Alloy;
TiNi形状记忆合金电阻钎焊技术的研究
USING THE EQUIVALENT TRANSFORMATION FROM A FOUR-TERMINAL STAR RESISTANCE NETWORK TO THE FOUR-TERMINAL MESH RESISTANCE NETWORK TO GET THE EQUIVALENT RESISTANCE OF ASYMMETRIC TIAN RESISTANCE NETWORK
用四端星形电阻网络到四端网状电阻网络的等效变换求田字形不对称电阻网络的等效电阻
People can also cause a blockage when they try to clean out their ears-- but only push the wax deeper inside.
当人们竭力想清洁耳朵时，他们可能会将耳蜡推入更深处而形成块状阻碍物。
In the collision that formed it, the stars mostly missed each other and went speeding ahead, relatively unimpeded.
在形成子弹状星云团的撞击中，大多数恒星擦肩而过，且快速向前运动，几乎未受任何阻力。
The Calculation of Air Resistance under the Ideal Model State;
浅析理想模型状态下空气阻力的计算
RESEARCH ON DYNAMIC IMPEDANCE FUNCTIONS OF PILE-RAFT FOUNDATION IN LAYERED SOIL
层状地基中桩筏基础的动力阻抗研究
THERMAL RESISTANCE OF HEAT TRANSMISSION AND MORPHOLOGICAL DIFFERENTIATION OF THE PELLS FROM SOME SPECIES OF RATS.
几种鼠的毛皮传热热阻力和形态分化
