查询词典 developable surface

The surface element of the material are not only changed, it is more important that electronic configuration of surface atoms have been changed remarkably, because of doping different metal ion.

我们在利用SPS和FISPS对过渡金属(M＝La，Cu，Co，Ni)复合氧化物系列的研究中发现，由于掺入不同的金属离子，不仅材料的表面元素发生了变化，更重要的是表面原子的电子组态也发生了明显的变化。

To thoroughly solve this problem, this paper built a 3-D finite element model of an surface wave EMAT used for the surface inspection of aluminum plates. Simulation analysis of the model revealed that transduction efficiency of the EMAT was greatly affected by EMAT parameters.

为了从根本上解决该问题，对用于铝板表面检测的电磁超声表面波换能器进行了三维有限元建模和仿真分析，发现换能器的几何参数对EMAT的换能效率具有重要影响。

Normal gravity equipotential surface is the ellipsoid, which is the standard surface.

正常的重力等位面是椭球面，也就是水准面。

In 1970s, boundary value problems with equivalued surface are put forward. Andit is important to study them to solve practical problems. Li Ta-tsien and his partnersdo systematic research on them, especially study certain kind of elliptic boundary valueproblem with equivalued surface on the domain with thin layer.

二十世纪七十年代提出了一类等值面边值问题，它对于解决实际问题起到了非常重要的作用，李大潜等人对其进行了比较系统的研究，特别的对在具有薄层的区域上的椭圆型等值面边值问题进行了探讨。

Leaves regularly alternate; stipules ovate to triangular, undivided, without glands; petiole much shorter than blade, without glands; leaf blade oblong to elliptic to ovate, abaxial surface paler than adaxial one but not whitish and not papillate, with 0-10 strictly marginal glands on each side, basal glands slightly larger but very similar, adaxial surface eglandular, base obtuse to slightly attenuate, margin serrate with teeth 3-5 mm apart, apex acute to acuminate.

叶规则地互生；托叶卵形到三角形，没有分开，没有腺；叶柄远短于叶片，没有腺体；叶片长圆形到椭圆形到卵形，背面比正面浅，但不带白色且不具乳突，在每边上各具正好0-10 枚腺体，基部腺体稍微有点大但是非常相似，正面无腺体，基部钝以稍渐狭，边缘有具3-5毫米裂片牙齿的锯齿，先端锐尖到渐尖。

The bonding strength of adhesive/metal can be affected by surface pretreatments,the effect of various surface pretreatments such as grinding with emery paper,acid etching,phosphating and blasting on the bonding strength by the shearing test are aim to ravel.

利用拉伸剪切实验系统地研究了砂纸打磨、喷砂、酸洗和磷化四种表面处理方法对粘结剂粘结强度的影响，并结合扫描电镜、表面粗糙度测试仪对金属表面形貌的研究，结合能谱测定拉剪试样破坏面的成分数据，详细分析了不同表面处理方法影响界面粘结强度的作用机理。

In ELID grinding, use imperceptible emery wheel to undertake grinding can obtain very low surface surface roughness, came true to written guarantee to steel of hard alloy exceed accurate mirror grinding.

在ELID磨削中，采用微细砂轮进行磨削可以获得很低的表面粗糙度，实现了对钢结硬质合金的超精密镜面磨削。

The corneal suface of children with emmetropia has toric shape. There is a fine coincidence between two methods in central corneal power. The corneal surface of children with emmetropia has the feature of irregularity and non-spherical surface.

儿童正视眼角膜表面呈托力克光学面；角膜曲率计与角膜地形图仪对于中央区角膜曲率测量有很好的一致性；儿童正视眼角膜表面具有一定的不规则性(CIM约0.63)和非球面特性(SF约为0.27)。

Test and analysis show that, the distribution patterns of the tangent veloctiy fields in the big cone area and the small cone area, which are comprised of para-free vortex and para-forced vortex, are basically identical without a change of the radius of the boundary surface; with the increase of the angle of the small cone, the para-free vortex area decreases and the para-forced vortex area increases, and the emulsifiability of the fluid drips increases with the increase of velocity gradient; the tangent velocity increases with the increase of inlet flow, and the maximum tangent velocities of both the big cone area and the small cone area are 4.94 times of the inlet flow; and the maximum tangent velocity increases with the increase of the split ratio and with the radius of the boundary surface not changed.

试验分析表明，大锥段和小锥段切向速度分布规律基本相同，均由准自由涡和准强制涡构成，分界面半径rm没有变化；随着小锥角θ的增加，准自由涡区缩小，准强制涡区扩大，速度梯度增加会加大液滴的乳化程度；随入口流量增加，切向速度增大，经拟合得出大锥段和小锥段的最大切向速度均为入口流量的4.94倍；分流比加大，分界面半径基本不变，最大切向速度增加。

The measurement of spontaneous surface wetting is one of the few experimental tools available for the study of solid-surface energetics.

对自发性表面润湿的测量，确实是研究固体表面力能学的少数几项试验方法之一。

Fostering the concept of multi-culture firmly and mastering the development of advanced culture correctly are conductive to resisting terrorism, separatism of nationalities and ultraism of religion, which is of great academic theoretical, immediate and profound historical si...

牢固树立多元文化的理念和正确把握先进文化的发展方向，有助于在世界范围内自觉地抵制恐怖主义，民族分裂主义和宗教极端主义。不仅具有重大的学术理论意义，而且也具有重大的现实意义和深远的历史意义。

But if anyone walks in the night, he stumbles, because the light is not in him.

11：10 若在黑夜行走，就必碰跌，因为那光不在他里面。