查询词典 helix

I used circular polarization helix antenna and linear polarization horn antenna do a lot of experiments for many situation, for example, different polarization mode、different distance between antennas and metallic body among antennas, and I acquire some valuable data.

使用圆极化方式的螺旋天线和线极化方式的喇叭天线分别对不同极化方式、不同天线间距和天线之间存在金属障碍物等各种情况进行了大量的实验，并获得了有价值的数据。

In the paper, the math model of the fitting machining benchmark curve of stone slice has been given, which used on the handrail of eddied ladder , and circular helix has been used to bi a fitting curve, the general control machining linear slicer of stone, and has resolved the practical question on the machining of stone.

本文给出了旋转扶梯扶手石材贴片的加工基准曲线拟合的数学模型，以空间螺旋线作为拟合线，并给出用c语言编写的通用处理程序，为石材数控线切割机提供了理论基础，解决了石材加工行业中的实际问题。

By analytic geometry method and solving quadratic equation,a computer simulation algorithm of digital projection under arbitrary scanning locus was proposed.The algorithm is based on the rules of attenuation of monochromatic X-rays.Through mathematical modeling and computer simulation,digital projections of ellipsoid and cylinder in circular and helix scanning modes are exemplified respectively,which are proved to be correct by FDK and PI-line reconstruction algorithms.

介绍了一种利用解析几何和求解二次方程仿真任意扫描轨迹下的锥束射线投影数据算法，该方法基于单色射线贯穿物体的衰减理论，通过数学建模与计算机仿真，给出了椭球、圆柱两种典型模型分别在单圆、螺旋线扫描轨迹下的投影数据仿真结果，并利用FDK和PI线重建算法进行验证，证明了该种数值仿真方法的正确性。

First, if the nucleotide consists of a unit having circular symmetry about an axis parallel to the helix axis, the whole diffraction pattern is modified by the form factor of the nucleotide.

首先，如果核苷酸组成一个单位有一个圆形对称轴平行的螺旋轴，整个衍射图样是修改了外形的核苷酸。

The results demonstrated that the measured molecular weight of phycocyanin was 37.715Kd, and consisted of two peptides which were similar with their molecular weight and amino acid sequences.4 The comformation of phycocyaninPhycocyanin high structure was investigated, as the result of circular dichroism spectrum and Fourier transformation infared spectrum shown, the secondary structure of NSPC was mainlyα-helix structure and the content ofβ-shee or coil was very small.

根据氨基酸自动分析仪测定的氨基酸组成和精确分子质量计算出NSPC分子总共有331个氨基酸残基，分别是由40个Asp、22个Thr、18个Ser、22个Glu、1个Gly、31个Ala、27个Cys、17个Val、13个Ile、22个Leu、5个Tyr、7个Phe、7个Lys、24个His、51个Arg、14个Pro、1个Met和9个Trp组成。胰蛋白水解酶分别酶解NSPC-1和NSPC-2后，分别采用MALDI-TOF-MS分析，其肽指纹谱图显示胰蛋白酶可将NSPC-1和NSPC-2水解成大小不等的多条肽段，质量数在800以上的NSPC-2有11段，即水解的肽质量分别为899.54、1454.77、1544.9、1683.87、1803.93、1811.91、1987.92、2003.90、2536.26、2915.42和3492.72。

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。

This paper introduces two methods of plasma arc powder automatic surfacing on a valve: helix surfacing and concentric circle surfacing.

介绍了2种阀门等离子弧粉末自动堆焊方式：螺旋堆焊和同心圆堆焊。

The coil is a conical helix.

线圈是一个圆锥形螺旋。

The work of this article is mainly focused on the following sections: a Detailedly expatiated temperature distributing of the solid transportation section in extrusion process of the conical twin-screw extruder, helix equation and the theory about extrusion output and solutions to them etc.

本论文的研究工作主要集中在以下几个方面： 1、较为详细地阐述了锥形双螺杆挤出机挤出过程中固体输送段的温度分布方程、螺旋线方程以及挤出产量的理论求解方法等。

Coordinate transformation in the study of tape helix.

带状螺旋线研究中的坐标变换。

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％。