查询词典 helicoidal surface

At present,the rate laws and reaction mechanisms of pyrite oxidation,pyrite and chalcopyrite formation,uraninite and magnetite dissolution in aqueous solutions are mainly studied,and it is discovered that (1)oxidation rate of pyrite controlled by surface reaction assume fractional dependence on Fe3+ and O2 molalities in acid solutions;(2)Pyrite cannot nucleate directly from solutions below 300 ℃,it can only form initially through sulfidation of a FeS precursor. The rate equation of reaction between FeS and H2S to form pyrite is of the second order;(3)Chalcopyrite is formed by reactions of pyrrhotite or pyrite with Cu2+,the former proceeds via a series of mediate metastable phases of Cu-Fe sulfide,whereas the rate equation of the latter is apparently of the first order which is controlled by surface reaction;(4)The nonlinear behavior of magnetite dissolution at acid pH can be represented by a shrinking core model coupling with surface reaction and diffusion transport.

目前主要研究了水溶液中黄铁矿氧化、黄铁矿和黄铜矿形成、晶质铀矿和磁铁矿溶解的速率定律和反应机理，发现：(1)酸性溶液中黄铁矿的氧化速率对Fe3+和O2浓度呈分数依赖并受表面反应的控制；(2)低于300 ℃时黄铁矿不能从溶液中直接成核，而需初始地通过FeS先驱物的硫化生成，FeS与H2S反应形成黄铁矿的速率方程为二级；(3)磁黄铁矿或黄铁矿与Cu2+反应均可形成黄铜矿，前者经历了一系列准稳的Cu-Fe硫化物的中间物，后者的速率方程为表观一级并受表面反应的控制；(4)酸性pH时磁铁矿的非线性溶解行为可采用表面反应扩散输运耦合的收缩核模型来描述。

Surface roughness and geometry topography have very obvious difference between ordinary and ultraprecision grindings. Surface roughness of ultrapreciscon grinding will decrease with abrasive size and grinding depth decrease, surface veining owing to plastic deformation is very clear.

超精密磨削和普通磨削的表面粗糙度和几何形貌存在明显的差异，超精密磨削的表面粗糙度随着金刚石砂轮磨粒尺寸和磨削深度的减小而减小，表面由于塑性变形形成的纹理比较明显。

Surface tension small polyalkene of printer materials and surface tension large polyalkene of printer materials, the adoption of a business card printing and membership card when making ink for surface treatment, the former to select a small viscosimetry envirogluvtm, which on the contrary.

表面张力小的聚烯烃承印材料与表面张力大的聚烯烃承印材料，在采用制卡和会员卡制作油墨时，需进行表面处理外，一般前者要选择粘度小的油墨，而后者则相反。

Use: suit for polishing different mirror surface of dishware of stainless steel, watchcase, and steel pipe. The mirror surface effect can be finished after polishing the disfigurement of oxidation layer on the metal material surface.

用途：適合不锈钢餐具、手表表壳和不锈钢管材等其他不锈钢工件的研磨及镜面抛光，除去不锈钢板材表面的氧化皮和缺陷，经研磨抛光后的表面可达到镜面的效果。

In the traditional founded surface metrology, the irregular roughness of surface topography falls into three scales, which were form, waviness and surface roughness respectively, according to their corresponding wavelength or frequency.

传统的表面计量学中，表面形貌的这种不规则的粗糙性被划分到三个尺度之中，分别为形状误差、波纹度和表面粗糙度。

For the complex road situation,Shanghai Municipal Engineering Institute linked the actual cases of tunnel,the common road surface concrete construction process was changed,to make road surface concrete leverl degree,rough degree and strength as well as wearproof all reached to the requirements of emergency repair,and finished 2,800m2 road surface repair work.

针对复杂路况，上海市市政工程研究所结合隧道的实际情况，改变一般路面混凝土的施工工艺，使路面混凝土的平整度、精糙度、强度及耐磨性均达到了应急抢修的要求，完成了2800平方米的路面抢修任务。

The possibility of characterisation of particle surface energy and surface energy componentchanges due to surface modification by thin layer wicking technique is studied.

本文研究了用薄板毛细渗透技术表征表面改性导致的粉体表面能及其各成分的变化的可能性。

The sludge in SBMBR1 presented granular characteristics and settled very well. The sludge in SBMBR1was brown and the sludge flocs was smashed by the shear force due to high intensity of aeration. The sludge size decreased and the sludge flocs blended with water forming ropy solutions, and there was no distinguish interface between water and sludge. Low sludge age and high loading operation enabled the sludge in SBMBR1 keeping higher sludge activity and the MLVSS/MLSS ratio and SOUR values of SBMBR1 were higher than SBMBR2. Both in SBMBR1 and SBMBR2, there were large amount of zoogloea, bacillus, coryneform of bacteria, and pediococcus. However, in SBMBR1 there were also a lot of Protozoa like epistylis and etc. A certain amount of filamentous bacteria can also be found in SBMBR1. The biological species in SBMBR1 were much more abundant than that in SBMBR2.3. Membrane fouling on flat-sheets membrane was observed and analyzed with AFM, SEM and TEM. After the measurement of membrane surface EPS and membrane surface ETX analysis, the pollutants composition on the surface of flat-sheets membrane was calculated.

从外观观察SBMBR1反应器中的活性污泥呈浅黄色，随着运行时间的增加，污泥粒径逐步增加，SV、SVI值逐步下降，呈现出较强的颗粒特征，沉降性能良好；SBMBR2污泥呈土黄色，污泥絮体被高强度的曝气所产生的切应力所打碎，污泥粒径迅速降低，絮体较为细碎，和水相混合成均一粘稠的溶液，看不到泥水分界面；低泥龄、高负荷运行，使得SBMBR1可以保持较高的微生物活性，MLVSS/MLSS值、SOUR值均高于SBMBR2；两级反应器活性污泥中均有大量的菌胶团，长杆菌、短杆菌和球菌是构成主体，但SBMBR1活性污泥中含有大量固着型原生动物如累枝虫等，还存在着一定数量的丝状菌，生物相要比SBMBR2丰富。3、借助原子力显微镜、扫描电镜、透射电镜等手段对平板膜污染现象进行观测和分析，并通过膜表面污染物EPS测定、污染膜表面能谱分析，得出平板膜表面污染物的组成。

The calculated result of the relaxed surface shows that the top layer atoms of ZrMn2(110) surface are arranged in an accidented plane and the space between atoms in ZrMn2(110) surface structure is decreased.

弛豫表面结构的计算结果表明表面结构的最表层为曲面，且表面结构的原子间隙变小。

The latest progress of the dynamic phenomenon on solid surfaces is summarized,including decay phenomenon of adatom islands, step fluctuations on the surface of metals,the hopping of special clusters on the surface of semiconductors,non-linear oscillation phenomenon on the surface of metal,etc.

总结了近年来国内外固体表面动态现象研究的最新进展，其中包括金属和半导体表面原子岛的塌落现象、金属和半导体表面台阶波动、半导体表面特异集团的跳跃、金属袁面非线性振荡现象及其它一些动态现象；描述了这些动态现象特征及形成机制，并展望了动态现象的研究方向和应用前景。

Mr. Putin said there were signs of genocide against the Ossetian people.

普京说，有迹象表明对南奥塞梯人进行了种族清洗。

What I'm trying to say, Tristan is...

特瑞斯坦。我想说的是。