查询词典 chord

Data pre-processing technologies such as singular points elimination, registration and radius compensation are studied. Base on chord high difference algorithm, a new one called chord high difference-ratio algorithm is proposed to improve veracity and robusticity of singular points elimination. Then, a registration algorithm based on local surface reconstruction is proposed, which avoids infaust influence coming from single reference point error.

在弦高差法的基础上，提出了全新的弦高差—比法，提高了异常点剔除的准确性和柔韧性；提出了一种基于局部图形重构的重定位方法，该方法通过对特征球的最小二乘拟合，消除了单一参考点的精度对重定位的影响；在此基础上对重定位的误差进行了详细的分析，给出了精确的误差值，从数学的角度保证了重定位的精度；在三角网格法的基础上提出了基于Delaunay三角剖分的半径补偿新方法，有效改善了补偿矢量的计算效率和准确性。

Firstly,by the analysis of influencing factors of settlement of loessal foundation, results indicated that among the three settlement methods such as the layer-wise summation method based on chord modulus, the layer-wise summation method based on modulus of compressibility and the layer-wise summation method based on modulus of deformation and so on, the layer-wise summation method based on chord modulus is superior to the other two methods and is very close to the actual measurement settlement of building according to the grey incidence analysis on influencing factors of settlement.

本文采用灰色系统理论中的关联分析法对黄土地基变形进行了因素关联分析，并取得一些成果。通过分析影响黄土压缩变形的因素，对于沉降变形因素的关联分析，在对影响变形的诸因素进行分析的基础上，最终证明选择了四种因素作为确定弦线模量表依据的正确性，证明了据此建立的以弦线模量为基础的变形定量分析的表达式是可行的。从关联分析以及弦线模量法的简便、直观、便于推广应用的特点来看，弦线模量法计算沉降是值得大力推广的。

Firstly, a formula is presented in this paper, for theultimate strength of T-shaped unstiffened CHS-RHS joint under out-plane bendingload. The yield line model based on flexural failure of the chord face, is assumed onthe basis of Von-Mises stress distribution on the chord face.

本论文在有限元数值计算基础上，根据主管表面的应力分布，假定了基于弦杆表面塑性破坏模式下的节点屈服线模型，推导了平面外弯矩作用下非加劲节点的极限承载力公式，与有限元计算结果非常接近。

Simulation results show that the new algorithm can keep an average path length similar to Chord while the length of routing tables maintained by most nodes are reduced remarkably(the length is reduced by 31% when the Chord ring is divided into 5 groups).

仿真实验表明，新算法能够保持与Chord接近的平均跳数，而大部分节点的路由表长度却可以得到显著地减小(如Chord环被分为5组时路由表长度减少了31%)。

The area bounded by a chord and the arc of a curve subtended by the chord.

弓形，扇形由弦正对的弦和弧线的弧所成的区域。

XiaoZhao, if you can play C Major Chord, You can go on to play F Major Chord

小钊，当你可以弹C大三和弦后，你就要弹F大三和弦了。

The piano musical instrument each key or chord send out the sound of different adjust type different pitch, however, these piano musical instrument each key or chord usually deviate the pitch that should have, causing to could not give musical performance the music result that should have, this needs to periodically adjust to these musical instruments.

琴类乐器各个键或弦发出不同调式不同音高的乐音，然而，这些琴类乐器各个键或弦经常会偏离应有的音高，导致演奏不出应有的音乐效果，这就需要定期对这些乐器调律。

The V chord is very up tight and you want to get back to the I, so you play the V and then try the IV each for one bar and then drop back to the I chord.

由于V级和弦非常具有压迫感，你又想回到I级，于是演奏一个小节V级后，再加一个小节IV级的过渡，又重新回到I级。

The horizontal bending moment and bending stress of the crossbeams rise quickly with increasing of the constraint stiffness of the lower chord joint to the crossbeam, the axial stress of the low chords and the continuous length of the floor system and with decreasing of the distance between the stringer and the low chord.

桥面系的连续长度和下弦杆的轴应力越大、下弦杆结点对于横梁的约束刚度越大、纵梁与下弦杆的距离越小，横梁的面外弯矩和弯曲应力越大。

The results show that space finite analysis results are close to test ones, bottom chords suffer axial force and large in-plane bending, and the max stress is nearby each middle internode. The max stress of node crossbeams occurs in No.2 bottom flange, and that of internode crossbeams happens in ones lying in the middle of every internode. The concrete slab is in tension at the longitudinal direction, and also suffers bent at vertical loads. The degree of completely-composite model taking part in the combined actions is about 55%, while that of semi-composite model is 42%-43%. The combination of concrete slab and bottom chord increases the degree of floor system taking part in the combined actions, lightens the burden of bottom chord, and reduces out-of-plane bending of node crossbeams especially the ones near bridgehead. Stress and displacement of main truss can be evaluated by a equivalent plane rigid frame in preliminary design, and effective stiffness of bottom chords are composed of original ones and concrete slab, and the concentrated load from deck can be translated into uniform load.

研究结果表明：空间有限元分析结果与试验结果较吻合；下弦杆受到轴向拉力和较大的面内弯矩作用，各节间最大应力出现在节间中点附近；节点横梁最大应力发生在横梁2的下翼缘，节间横梁最大应力发生在位于端节间中部的小横梁上；混凝土板顺桥向整体受拉，并在竖向集中荷载作用下产生弯曲变形；全结合模型大部分节间内的桥面板参与主桁共同作用的程度为55%左右，半结合模型桥面板的参与程度为42%~43%；桥面板与下弦杆结合能够增加桥面板的参与程度，减轻下弦杆荷载，减少节点横梁尤其是靠近桥头横梁的面外弯曲；对桥梁进行初步设计时，主桁杆件的位移与内力可按照1个等效的平面刚架计算，下弦杆的等效刚度由原下弦杆截面和混凝土桥面板截面组合而成，桥面荷载可转化为均布荷载施加。

More direct, directer ; most direct, directest

径直的，笔直的

Do you know how to use a chain saw?

你知道如何使用链锯吗？