查询词典 angle of helix

According to the helix theory , the algebraic sum value of all rotations of dihedral angle helix is equal to zero in the structure of 1,3-disubstituted cyclohexane derivatives.

按照螺旋理论，1，3-二取代环已烷衍生物的结构中存在的二面角螺旋旋光度代数和为零，不应具有旋光性，但是它们却是光学活性的。

Herein, a self-assembly system with polymer pattern of lower molecular weight polyaerylie acid have been built up, in which some nanosized complex was synthesized, including nanosphere of Pb-PAA, one-dimensional nanorod of CuS-PAA and PbS-PAA, one-dimensional helix nanochain of PbSO4-PAA, and one-dimensional reticulate nanofibres of PbCr2O7-PAA. The mechanism was discussed preliminarily, the important action of the bone angle torsion as well as the ""contact bridge"" served by ion in the course of self-assembly was proposed for the first time.

本文以低分子量聚丙烯酸为高分子模板构建自组装体系，首先合成了几种特殊形态的纳米配合物，包括纳米微球Pb-PAA、一维纳米棒CuS-PAA和PbS-PAA、一维螺旋纳米链PbSO_4-PAA及一维有序纳米纤维网络PbCr_2O_7-PAA，初步讨论了该自组装体系的合成机理，首次提出了键角张力和分子的"搭桥"作用在自组装过程中的作用。

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要：随着卫星导航通信技术的迅速发展，天线作为卫星导航通信系统中的重要部分，在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线，讲述爬行波式螺旋天线的设计过程，并给出最终测试结果。结果表明，该天线具有优良的圆对称半球波束，良好的广角圆极化特性和优良的阻抗匹配特性，其结构简单、紧凑，为通信入站回传提供了一种优良的选择。

The effect of main screw parameters (length/ diameter ratio, helix angle, channel depth and compression ratio)of cold feed rubber extruder on extrusion temperature were investigated by orthogonal regression method on the basis of the statistical analysis of experimental results.

研究了螺杆造型（长径比，螺旋升角，螺槽深度，螺杆几何压缩比），挤出工艺和胶料种类对橡胶冷喂料挤出机挤出温度的影响，并对各实验因素及实验结果做了统计分析，得出了他们之间的定量数学模型。

On hobber processing the gear of different modulus,tooth number and different helix angle,that will select difference the option of shipand ship will be calculated,will again check table to determine,bring certain difficulty to processing.

在滚齿机上加工不同的齿轮，需要选择不同的挂轮，挂轮的选择要边计算边查表才能确定，工作量较大。

It has been devoting itself into the recreation study and development of leather machine in recent years and is producing computer-controlled spray machine, stainless soften tambour,eight-angle soften tambour,pancake helix vacuum drier,surface-pull drier,polishing machine etc.more than ten kinds of products with many size.

北江皮革机械有限公司是由制革公司和北江皮革机械服务部为前身，积累了数10年制革机械的使用经验和标准，多年以来致力于皮革机械的创新研究与开发，目前以生产电脑控制喷浆机，不锈钢摔软转鼓，八角型摔软转鼓，水平螺旋转鼓、多板真空干燥机、抛光机辊印涂饰机、棚平干燥机等数十种产品，近几十种规格。

Often described as a slender body of a white horse, the amount before a helix angle (which is also a characteristic of the Licorne).

通常被形容为体型修长的白马，额前有一螺旋角。

The influences of traction angle , coefficients of friction and helix angle on the flow rate of solids were discussed.

理论上证明了这两种情况下的固体输送机理与外螺杆的情况相同，均建立在固体摩擦输送机理基础之上；讨论了牵引角、摩擦因数和螺纹升角对上述三种情况固体输送流率的影响。

The results indicate that the oil-film thickness increases with the increase of normal modulus and it decreases with the increase of gear width,helix angle and normal pressure angle while the transmission ratio changes.

在斜齿圆柱齿轮的啮合过程中，由于每个瞬时沿齿面接触处的曲率半径、表面速度和载荷等参数均不同，所以该过程是动态的。

The analytical expresses of scattering field are obtained based on the boundary condition of a sheath helix model. The effects of the pitch angle and the electrical size of the helix on the resonant behavior are also investigated. It is shown that the resonant behavior of the forward/back scattering far field only depends on the pitch electrical size and the radial electrical size, and that the turn of the helix has no effect on the resonant behavior.

根据sheath螺线管模型的边界条件获得了散射场的解析表达，同时研究了螺线管在共振状态下电角度及螺间距的影响，表明远场的前后向散射的共振状态只依赖于间隙的电场大小及径向的电场大小，而螺线管的倒转不影响谐振状态。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失