查询词典 dispersion

Such a viewpoint of the effects of a little water addition has never been reported, it opened a new way to product SWCNTs with high purity and low cost. On the ground of the experimental results and mechanism studies, a little water addition may open a way for using the natural gas as carbon source to manufacture SWCNTs. By analyzing XRD, XPS results and with comparative experiments, we concluded that the active phases of SWCNTs growth in Ar were small Fe particles. A little W species can improve the surface characters of support and increase the dispersion of Fe particles, but higher W loading will cause large quantity of WC, which decompose CH〓 to amorphous carbon.

本文根据W-Fe-MgO催化剂中间产物和粗产物的XRD、XPS测量结果，结合制备实验和对比实验指出：在Ar中1073K下，生长SWCNTs的活性相是Fe的小颗粒，少量W在催化剂中以氧化物形式对载体表面改性，起提高Fe分散度的作用，但W浓度过高时在反应过程中会生成大量WC，又会催化CH〓分解为无定形碳，造成产物中SWCNTs含量下降。

The viscoelasticity can cause energyattenuation, frequency dispersion, phase distortion of the seismic wave, and sometimes lead the seismic processing and interpretation based on the elastic wave theoryinto a risky trap.

粘弹性介质造成地震波能量衰减、频率发散、相位畸变，并使得一些基于弹性波理论的地震处理和解释技术面临踏进"陷阱"的危险。

Control of dispersion is much more precise in the operating band of the waveguide.

在波导的操作频带范围内，其扩散角度的离散控制更加精确。

Smoke emissions into the stable air fan out in the horizontal with little vertical dispersion other than wavelike oscillations.

排放到稳定空气中的烟在海平线中成扇形展开，有少量垂直分布，而没有波状振动。

Therefore, the limitations of information entropy based approach and weighted mean roughness approach are discussed, and a concept of conditonal attributes dispersion degrees in information systems is proposed.

对此，讨论了基于信息熵方法和WMR方法的局限性，提出了信息系统中条件属性集的离散度的概念。

The catalyst was characterized by transmission electron microscopy, X-ray diffraction and energy dispersion X-ray spectrum.

利用透射电镜、X-射线衍射和能量散射X-射线能谱对催化剂进行了表征，并用循环伏安实验评价了催化剂对甲醇电化学氧化的电催化活性。

From the results of IR and XPS spectrocopy. The cationic sol components H〓SiO〓 and 〓 of the solution trend to adsorp on the surface of electronegative aegirine because of electrostatic acctraction each other, and interrupted the collector's reaction with Fe〓 on the surface. Hence the flotation of aegirine was decreased, on the other hand, there is electrostatic repulsion between the surface of hematite and the cationic sol H〓SiO〓.〓, Which has advantage to dispersion of hematite particles, therefore, the hematite flotation is achieved sucessfully with anionic collector.

根据红外光谱和XPS测试结果可知，在弱酸性介质中，活性硅酸胶体抑制剂中荷正电的胶团H〓SiO〓及〓由于电性吸引而选择性地覆盖在荷负电的钠辉石表面，从而阻碍了阴离子捕收剂与表面Fe〓的配位作用，导致钠辉石的浮游被抑制；而赤铁矿表面由于荷正电，与矿浆中的H〓SiO〓、〓等硅酸胶团存在着电性排斥作用，有利于赤铁矿颗粒的稳定分散，所以赤铁矿能够被脂肪酸捕收剂吸附而选择性上浮。

Objective: To evaluate effects of coronary artery angioplasty on QT dispersion in patients with coronary heart disease.

目的 探讨冠心病患者经皮冠状动脉成形术后对QT离散度及较正QT离散度的影响。

Objective:To study the effects of percutaneous transluminal coronary angioplasty on QT dispersion in angina pectoris patients.

目的：探讨经皮腔内冠状动脉成形术对心绞痛患者QT及JT离散度的作用。

In chaPter 2, thesemethods are emPloyed to inveStigate the wave motive equation of amonatomic chain Wth second nearest-neighbor harmonic andquartic anharmonic interactions get a new linear dispersion relation.

第二章研究了涉及次近邻谐振和四次非谐相互作用下的单原子链中的波动问题，得到了新的色散关系。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。