查询词典 surface area

Starting from this dowble, firstly introduces the basic concept and the double integral method, double Integral calculation music volume and surface area of top cylinder, and the application examples in the double integral application in mechanics.

本文从二重积分入手，首先介绍了二重积分的基本概念和计算方法，二重积分计算曲顶柱体体积和曲面面积的在应用举例，以及二重积分在力学中的应用。

Significant processing steps can include: a phase changes involving either the desired molecule or the solvent, inert carrier or vehicle, e.g., dissolution, crystallization, evaporation, sublimation, distillation or absorption; b a phase separation such as filtration or centrifugation; c any chemical change involving the desired molecule, e.g., removal or addition of water of hydration, acetylization, formation of the salt; d an adjustment of the solution containing the molecule such as adjustment of pH or pO2; e a precision measurement of contained or added BPC components, in-process solutions, recycled materials is performed, i.e., weighing, volumetric measuring, optical rotation, spectrophotometric determinations, etc.; and f changes occur in surface area, particle size, or lot uniformity, e.g., milling, agglomeration, blending.

意义较大的步骤可能会包括：a相变化，包括指定分子或溶剂，惰性载体或溶媒，如溶出作用，结晶，蒸发，升华，蒸馏或吸附；b相分离，如过滤或离心；c涉及指定分子的任一化学变化，如结晶水的除去或添加，乙酰化作用，成盐；d包含分子的溶解的调节，如调节pH或pO2；e 含有或添加原料药组分，过程内溶液，回收物料的精密测量，如，称重，体积测量，旋光度，分光光度测定，等和f 表面，粒度，或批一致性的变化，如磨碎，凝块，混合。

It was found that the NCC was composed of much well-grown graphite-like crystallite with average interlayer spacing (d002) of 0.377 nm. The NCC had lower surface area 130.7 m^2g^(-1 and more distinct crystal character than activated carbon.

结果表明，微晶炭含有大量的较为完整的类石墨晶，微晶的平均层间距d002为0.377nm；具有比活性炭低的比表面积130.7平方公尺g^(-1力和更明显的晶体特性。

Nanometer TiO2 thin film supported on wire gauze were prepared with sol-gel method and modified by doping carbon black to increase specific surface area.

通过溶胶－凝胶法制备纳米二氧化钛，采用浸渍提拉的方法将TiO2固定在金属丝网上，通过掺杂碳黑获得高比表面的催化薄膜，用比表面仪、X-ray衍射仪进行表征。

No, you don't need to remember how to compute the surface area of a curve when rotated about the x axis.

不，你不需要去记如何求一个绕x轴旋转的曲面的表面积。

Chromium and iron oxide supported silica-pillared zirconium phosphates with high surface area have been prepared successfully by the new method as well.

2同样采用先负载后再焙烧的方法，制备了大比表面负载氧化铬和氧化铁的氧化硅层柱磷酸锆，进一步表明此方法具有一定的普遍意义。

Zirconium containing MCM-41 molecular sieves with high surface area, good crystallinity and Si / Zr ratio from 20 -∞ were synthesized in a near neutral condition by using a sodium silicate as silicon source and a zirconyl nitrite as zirconium source.

MCM - 41与传统分子筛比较，最突出的特点是具有 1～ 5nm直径的孔道和 1 0 0 0m2 ·g- 1 左右的比表面，如此宽孔道尺寸的固体材料对于大分子的吸附和催化具有潜在的应用前景[1 - 3] 。

Their specific surface area and acid strength were measured, and their catalyt and SBA-15 were ic performance was evaluated in the synthesis of fructone by acetalization of ethyl acetoacetate with ethylene glycol.

用浸渍法制备了一系列负载型磷钨酸及其铯盐催化剂，载体包括超稳Y沸石、脱铝超稳Y沸石、SiO2和SBA-15，测定了催化剂的比表面积和酸强度，并在乙酰乙酸乙酯与乙二醇液相缩合制取苹果酯反应中考察了催化剂的性能。

The grindability of cement clinker was better than ordinary Portland cement, for example, on the same condition it took the high alite content Portland cement clinker 4.5min to grind to a specific surface area of 320m2/kg, while the o...

同时这种水泥熟料的易磨性优于普通硅酸盐水泥熟料：在相同条件下，磨细到比表面积320m2/kg时，这种熟料需要4.5min，而普通硅酸盐水泥熟料则需要8.0min。同时对该熟料进行了岩相检验分析。

The change of activity,specific rate,turnover frequency,acid coverage and the coverage ratio of acidic to alkalic surface area had a similar regularity with the change of the state and the composition of iron oxide precursor of catalyst.

随着母体铁氧化物性质和组成的变化，催化剂活性、质量反应速率、合成氨转换频率和表面酸覆盖度及其酸碱覆盖度的比例有相似的变化规律，即与Fe2+/Fe3+呈驼峰形变化曲线。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。