查询词典 extraction

Then the effect of different target extraction algorithms on grating lobes was discussed in detail, a modified method based on 'abnegation method' was developed, which can achieve the optimal result in case of high sampling , simulation results prove that it is feasible.

对舍弃法进行了改进，改进后的舍弃法对自相关函数栅瓣较小的线性调频步进信号在采样率足够高的情况下，可以达到最优的处理结果，仿真结果证明了理论分析的正确性。

According to the experiment, the method is an effective one for edge extraction of the abrasive image.

实验表明该方法对于磨损图像的边缘特征提取是行之有效的。

The key to feature extraction is to select the optimal feature combination from all the features. In this study, the optimal color feature combination,{/G,(R+4G+B)/6, H variance, S variance}, is selected using genetic neural network at first. Then the main texture features including the mean, variance, energy and entropy of the cooccurrence matrix, the secondary texture features including the maximum frequency number, absolute uniform, inertia and importance of the co-occurrence matrix are extracted.

在此基础上，提出适合多阈值和小目标图像分割的免疫遗传图像分割方法，该方法借鉴了生物免疫系统自调节、抗原识别和记忆功能，并结合了遗传算法对图像进行自适应区域的阈值分割，改善了遗传算法优化复杂问题时存在收敛速度慢和易陷于局部最优的不足，克服了传统阈值分割方法对目标大小的限制，是一种新型的有效的图像分割方法。

It,s allelchemicals were isolated through extraction, thin-layer chromatography, and column chromatograpathy. After the white clover was infused in ethanol and evaporation, the leavings was dissolved by water. The aqueous extract was extracted by petroleum,chloroform, ethyl acetate and n-Butanol successively, and the bioassay showed that the chloroform phase has obvious inhibitory effect, the inhibitory rate was 44.32%,88.08% on Abutilon theophrasti M., seedling length and root length, 82.08%,92.16% on Echinochloa crusgalli L., seedling length and root length, and the Amaranthus retroflexux L., germination rate is 0, the secondly was ethyl acetate phase.

运用萃取、薄层层析、柱层析等方法对白三叶草地上部分的化感物质进行初步分离，结果表明，白三叶草经乙醇浸提旋转蒸发后用蒸馏水溶解，依次用石油醚、氯仿、乙酸乙酯、正丁醇萃取，生物测定表明氯仿组分对杂草的抑制作用最强，对苘麻芽长和根长抑制率分别为44.32%、88.08%，对稗草芽长和根长的抑制率分别为82.08%、92.16%，反枝苋的发芽率为0；其次是乙酸乙酯相。

Different target information is obtained by making use of different abutment pixel templates, and the extraction results are compared and analyzed.

将传统算法和数学形态学算法相结合对目标影像进行了预处理，通过不同的邻接像素模板得到了不同的目标信息，并对提取结果进行了比较分析。

Map of the object extraction, access to the database, you can quickly read!

这个是对地图对象的提取，存取在数据库中，可以快速的读取！

The results showed that the TCA/acetone method is the most suitable protein extraction method for wheat leaves.

因此，三氯乙酸／丙酮法是提取小麦叶片蛋白的较优方法。

Then repeat the progress,and the solvent is formed,then repeat the circle-extraction to concentrationfor several times until the extracting solution is achromatism,at this time,the extracting solution is stopped to stopped to sunction into the concentrator.

重复上述过程，从而形成的溶剂经提取-浓缩大循环经返多次后，提取液呈无色，此时，提取液停止抽入浓缩器。

Objective To optimize the extraction processes for ferulic acid from Biyuanshu Nose Drop .

目的优选鼻渊枢滴鼻剂的提取工艺。

In this paper alkali extraction and acid precipitation of rutin from bud of Sophora japonica L was studied.

探讨了碱提酸沉法提取槐花中的芦丁。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。