查询词典 derivative

On the convergence of Newton's method in Banach space〓 Let F be an operator mapping from a real or complex Banach space X to another one Y, the Newton iteration 〓(2) is used to find the approximative solution of the equation (1), where the derivative is meant in the Frechet sense.

一、Banach空间中Newton法的收敛性〓设F是由实的或复的Banach空间X到同型空间Y的算子，求解方程(1)的Newton迭代为〓，0，1…，(2)其中的导数指的是在Frechet意义下的。

A new ashless and non-phosphorus containing triazine derivative, 2,4,6-tri (n-dodecyldithio)-1,3,5-s-triazine, was prepared.

合成了一种新型无灰、无磷三嗪衍生物十二烷基二硫代三嗪。

METHODS:AsOR was conjugated to PL by EDC; The active ester of PEG derivative was reacted with the amino groups in PEI to form PEG-PEI conjugate; DNA was first complexed with PEG-PEI and then with AsOR-PL. In vitro transfection experiment was conducted in the galactose receptor positive Huh-7 cells.

分别制备AsOR-PL偶合物及PEG-PEI偶合物，然后按照不同的比例先后与报告基因DNA形成复合物，再进行Huh-7细胞的体外转染试验和静脉给药后小鼠体内的表达试验。

The difference of expressed proteins between Lai strain and its avirulent derivative were also studied.

此外，我们还研究了赖株及其无毒株的蛋白表达的差异，以期发现新的、重要的毒力因子。

Chlorophyll fluorescence excitation spectra of six phytoplankton species, belonging to Bacillariophyta and Dinophyta, were dealt by fourth-derivative analysis with the Matlab program.

测量了分属硅藻和甲藻两个门类的六种我国东海常见赤潮藻的叶绿素荧光激发光谱，以Matlab为操作平台，采用自编的光谱求导程序，对荧光激发光谱进行四阶导数处理。

A new kind of barbituric acid derivative 〓 and dimelamine compound DM which has not been reported are synthesized and measured.

首先合成了巴比妥酸衍生物〓和一种新的未见报道的双蜜胺化合物 DM，并进行了表征。

The results have indicated that the introduction of electron-donating methoxy or electron-withdrawing cyano-group at the 7-position of 3-phenylcoumarins caused a bathochromic shift for both absorption and fluorescence spectra. The phenyl group at the 4-position derivative has a hypsochromic shift for both absorption and fluorescence spectra.

结果发现，在3-苯基香豆素的7-位引入给电子基团甲氧基或吸电子基团氰基均使它们的吸收光谱和荧光光谱产生红移，4-苯基香豆素的衍生物的吸收光谱和荧光光谱均产生蓝移。3-苯基香豆素衍生物与4-苯基香豆素的衍生物的基态和激发态的电子转移方向相反。

The initial interaction modes of pyreno[2,1-b]pyrrole and its dimeric derivative with F in MeCN can be understood as hydrogen-bonded complexes. Excess F ions promotes deprotonation of N-protons and results in the bathochromic changes in both absorption and fluorescence spectra.

实验过程中发现，在初始模式中，芘骈吡咯及双芘骈吡咯与氟离子形成氢键附合物；之后加入的氟离子，因其带有极强的碱性，将促使吡咯官能基中氮上氢进行去质子化，而造成吸收及萤光光谱的红位移现象。

Besides, a preliminary study of the bottom classifying of shallow water bathymetry by spectral derivative based on simulation data is carried out in this thesis.

论文最后基于模拟的高光谱遥感反射比数据，利用光谱微分技术对海底类型区分进行了初步研究。

Tumor Hospital, Harbin Medical University, Harbin 150040, China AIM: To study the inhibitory action of derivative of benzhydroxamic acid on gastric cancer cell line and the mechanism.

目的：探讨苯异羟肟酸衍生物对胃癌细胞生长的抑制作用及其机制。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。