灵敏度

The molar ratio of sulfate ions to carboxylate ions is determined by conductometric titration method and the molecular weight is tested by high performance gel permeation chromatography. The precision of these two methods is also studied. To improve the detection sensitivity, guanidine hydrochloride is used as the best derivation reagent of 911. A systematic research is done on the optimum derivatization condition of 911 and Guanidine hydrochloride. The M /G ratio of 911 has direct relation to its biological activity.

论文首先对911的基本理化性质进行了系统的分析，以电导滴定法和高效凝胶渗透色谱法分别测定了分子中硫酸根羧酸根的比值和911的分子量，并探讨了两种分析方法的精密度。911分子没有紫外吸收，为提高检测灵敏度，本文采用荧光标记法，通过对三种荧光试剂与几种寡糖和多糖衍生效果的综合比较，最终确定了盐酸胍为最佳衍生试剂，并以911为代表详细探讨了衍生化反应的最优条件。911糖链结构与褐藻胶主链结构类似，以甘露糖醛酸和古罗糖醛酸的嵌段形式存在，分子中M/G比值与911的物理化学性质和生物活性有直接关系。

This paper presents the way to configurate the distribution transformer,and the setting method for the stator earth fault protection with the example of Hubei Tiantang Pump storage power plant.

配电变压器的配置及其接地保护的整定计算主要包括选择合适的二次电阻、接地保护的动作电流、电压值及校验保护灵敏度和单相接地短路点的总电流值等。

However, electron-withdrawing groups that have conjugative effect in molecule can increase complex ability, sensitivity and selectivity of fluorone reagents. From the experiment, it is clear that microemulsion media have more excellent solubilization and sensitization than micelle and water media.

而具有吸电子效应和共轭效应的基团，可以改变显色剂分子的电子云分布，使分子的共轭程度增大，使反应官能团羟基质子较容易离去，增加了显色剂与金属离子的成络能力，从而提高了试剂的灵敏度和选择性。

Accelerator mass spectrometry has ultra-high sensitivity and can be used to detect extremely low impurity contents in samples. 10Be is a cosmogenic nuclide. As a tracker, it has been widely applied to earth, environmental and cosmographic sciences.

加速器质谱计具有很高的灵敏度，能测量样品中含量极微的杂质同位素。10Be是一种宇宙成因核，在地学、环境科学和宇宙学等领域有广泛的应用，它为纯β衰变核，端点能量低且半衰期很长。

With combination of this sensitivity formula and the Courant's maximum-minimum principle one interesting theorem is proposed on the optimal support location to maximize buckling load.

结合灵敏度公式和极大极小原理提出了使屈曲载荷达到最大的优化支承位置的一个定理。

The method has high sensitivity and reproducibility, and has been applied to determination of Crin water with satisfactory result.

方法简便易行，灵敏度高，重现性好，选择性强，可用于环境水样中痕量铬的测定。

Based on the artificial neural network model, the sensitivity analysis on each variable of model shows that the effect of ring index of diameter at breast height of Cunninghamia lanceolata on sun-spot is even, and the effects of auto-correlated factors of sun-spot on sun-spot are sensitive, which shows that three variables all have significant effects on sun-spot.

并对网络模型中各变量进行灵敏度分析，分析表明，杉木胸径生长的年轮指数对太阳黑子相对数年平均值影响较平坦，而太阳黑子自相关因子Yt-4和Yt-2对太阳黑子相对数年平均值影响较灵敏，3个因子对太阳黑子相对数年平均值均存在一定的影响。

The cylindricity could be calculated by least squares method and wavelet error separation method that the measurement error could be decomposed by Harmonic analysis algorithm based on wavelet theory.

针对激光 CCD 灵敏度高，干扰噪声容易混入测量数据中的问题，提出了一种基于小波分析的误差分离方法，即运用谐波分析的思想方法和小波理论中多频率分析算法进行误差分离，误差分离后的数据用最小二乘法处理求出圆柱度。

This algorithm utilizes adjoint network method to efficiently calculate the sensitivity of objective function with respect to each decap values and uses equivalent circuit modeling technique to reduce the scale of the network which makes the whole optimization algorithm more efficient.

该算法采用伴随网络方法快速计算电路灵敏度，并应用等效电路技术来提高算法效率。

Multidirectional moiré fringe patterns of flow field in supersonic wind tunnel are obtained by using high precision moiré deflectometer and discrete angle rotating mode.

应用高灵敏度叠栅偏折仪和间隔角度旋转模型的方法获取超音速风洞中流场的多方向叠栅条纹图。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。