查询词典 direct method

In this method,β-cyclodextrin epichlorohydrin polymer of 60-80 mesh, which has less background absorbance in ultraviolet and visible region compared to other ion-exchanger resins, was used to support direct adsorption of tartrazine from aqueous solutions to form a solid complex (tartrazine-β-CDP complex). The effects of pH, temperature, time and ionic strength on the β-CDP including tartrazine were determined.

在这个方法中，所利用的β-环糊精聚合物（60-80目）和离子交换树脂相比，在紫外和可见光区吸收很小，其作为固体相的支持体，并用於从样品溶液中分离收集柠檬黄，然后在435nm波长下直接用於测定。

The second route firstly studied the tautomerization of the key intermediate from spirostane to cholestane 3-O-substituted kryptogenin,then formed a direct access used Zn/KI/HOAc reduction,which supplied a better synthetic method of MPD and other furostanol saponins.

第二条路线则首先研究了由螺甾到胆甾结构的关键中间体3-O-substituted kryptogenin的异构化现象，建立起以Zn/KI/HOAc还原反应直接合成该中间体的过程，这提供了一个更好的合成甲基原薯蓣皂苷及其他呋甾皂苷的方法。

The result indicate that: the electrodeposition of zinc on nickel and tungsten substrates involves instantaneous three-dimensional nucleation. The coating is the best when the current density is 4mA/cm2 and the temperature is 80 ℃. The coating by the method of the impulse electrodeposition is better than the direct current electrodeposition. Especially when f is 100Hz, ton/toff is 2/8 and J is 8mA/cm2, the coating is clean and uniformity. The crystal size is nearly 0.3μ m .

结果表明：阴极反应为准可逆反应，锌离子在镍电极和钨电极上形核是三维瞬时形核半球形扩散长大过程，直流电流密度为4mA/cm2，温度为80 ℃时，镀层质量最好；脉冲电沉积得到的镀层要优于直流电沉积得到的镀层，尤其在脉冲宽度为2ms，脉冲间隔为8ms，电流密度为8mA/cm2时，得到的镀层光滑而均匀，颗粒大小接近0.3μm。

The main problem of direct toque control of a three-level inverter and control technique virtual synthesizing vectors based are demonstrated in detail, also, the method of vector selection is discussed materially.

深入阐述了三电平逆变器直接转矩控制的主要问题及虚拟合成矢量控制方法，详细讨论了三电平逆变器直接转矩控制中的矢量选择方案。

This paper presents a design method of fuzzy PI parameter adaptive con troller in order to settle better the nonlinear problem of parameters ' changing in direct torque control .

为了更好地解决直接转矩控制系统中的变参数非线性问题，提出了一种适用于异步电动机直接转矩控制的模糊参数PI自适应速度调节器的设计方法

Considering this problem,a method of direct constructing disjoint paths is adopted,at the same time network simplification technology and truncation error theory is combined.

针对这一问题，采用直接构造不交化通路集的方法，结合网络简化技术和截断误差理论，提出了一种快速确定大型通风网络可靠度的算法。

This measurement frequency using direct comparison of the phase relation is a new important method to probe into the accurate measurement of the ultrahigh frequency like the optical frequency.

这种利用相位关系直接比对测频是探索光频等超高频率准确测量的一种重要的新方法。

There is very little information for general cell diagnosis, which is universal problem in aluminum reduction process. Studies on technique of getting and processing cell state parameters have been made, where direct detection, on-line emulation and fuzzy information processing are combined. Then a new method of dynamic temperature detection, it's model and formula are proposed, and a practical equipment was designed. 3. Information about aluminum reduction process state are very different, not enough and unprecise, while there are many knowledge based on experience.

2为解决目前铝电解过程控制系统中普遍存在的、能用于槽况综合解析的信息不足这一问题，研究了综合运用直接检测技术、在线仿真技术和模糊信息处理技术等技术获取和处理电解槽的各种状态参数和信息的方法；并提出了一种新型的动态测温方法，推导了该方法的数学模型和计算公式，给出了公式的误差分析并设计了一个实验用动态测温装置，向实现对电解质温度的直接检测和控制迈出了探索性的一步。

A general unstable chaotic solution of the Duffing oscillator in a double-well with weak periodic perturbations is obtained by using the direct perturbation method in this paper.

利用直接微扰的方法求出了双阱中具有弱周期微扰的Duffing 振子混沌解的一般表达式。

If direct apply mechanically, it is easy bump into a word to bump into a " with others ", 2 it is the method that can not allow you to master depict, when well-turned phrase of " good word this " is not beside you when, you still are not written give good sentence.

假如直接套用，一是轻易和别人"撞词撞句"，二是并不能让你把握描写的方法，当"好词佳句本"不在你身边的时候，你还是写不出好句子。

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。