查询词典 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。

According to the helix theories of cylinder,the essential factors of helix with torus are analyzed,and the parametric equation of helix on torus is given based on analytic geometry.

根据圆柱螺旋线理论，分析了形成圆环螺旋线的要素，并运用解析几何方法建立了圆环螺旋线的参数方程。

It was found that the silk fibroin obtaineddirectly from anterior and middle regions of middle division of silk gland is in orderedstate, assumed to be in nematic form, but not observed in posterior region, in whichliquid silk fibroin is in coiled coil and some α-helix forms. In the middle region of middle division there is a relatively regular arrangement for the α-helix, and there is arelatively regular arrangement for β-strand and loosed α-helix in anterior region.

在熟蚕丝腺体的中部前、中段的丝心蛋白处于类向列型液晶的有序态，而中部后段中则观察不到此有序态，而是呈无规线团和一些α-螺旋结构，而且中部前中段的结构也有区别，中部中段的有序态为α-螺旋结构的相对规则聚集，而中部前段的则为β-伸展链和松散α-螺旋结构的相对规则聚集。

In Polymer, helix is a quite universal configuration Recent experiments show thatsome polymers such as bacterial flagellar filaments can form bistable helices in ionsolutions, which means that left handed helix and right handed helix can coexist in thesame environment The mechanism of this phenomenon has not been explainedsatisfactorily.

在高分子中，螺旋是一种很普遍的高分子组态。近来实验发现，一些高分子，如细菌鞭毛丝，在离子溶液中能够形成双稳态螺旋，即左螺旋与右螺旋在相同的条件下能够同时存在。

In order to design reliable wire ropes by investigating the deformation characteristics of wires helix, axial strain's explicit expressions and radius' expressions of wires helix were deduced in which wires were bearing axial load and just touching each other. Additionally, cross section curve of helix wire, contact radius, clearance angle, width and ratio in wires' same layer were obtained.

为了掌握轴向载荷下螺旋钢丝的变形特性以合理设计钢丝绳，推导了螺旋钢丝轴应变显式表达式，给出了螺旋钢丝截面曲线表达式和同层螺旋钢丝正好满足接触时钢丝的半径及接触半径、间隙角、间隙值和间隙率表达式。

The helix angle is the same on each gear, but one gear must have a right-hand helix and the other a left-hand helix.

该螺旋角是一样的，每个齿轮的，但其中一个齿轮必须有一个右手边的螺旋和另一人左手螺旋。

The helix angle is the same on each gear, but one gear must have a right-hand helix and the other a left-hand helix.

螺旋角度是相同的在每个之上齿轮，但是一齿轮一定有一个用右手的螺旋和另一个一个左侧的螺旋。

The helix angle is the same on each geas, but one gear must have a right-hand helix and the other a left-hand helix.

节面角在每上相同geas，但是一个齿轮必须有一个右手螺旋和其他一个左手螺旋。

The helix angle is the same on each gear, but one gear must have a right-hand helix and the other a left-hand helix.

节面角在每个齿轮上相同，但是一个齿轮必须有一个右手螺旋和其他一个左手螺旋。

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。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。