时基

In comparison with the organic solvents as reaction medium, higher conversion was achieved the tert-ethyl valerate could be formed in the ionic liquid medium.

当反应体系中存在水时，有特戊酸生成。表明反应中2，2，4-三甲基戊烷首先发生β-断裂反应，生成叔丁基正碳离子和异丁烯。

The results confirmed the significant inhibitory effect of glycosylation on fibril formation, and showed that fibrils formed more easily when the residue 129 is valine.

结果发现醣化会大大的抑制自发性纤维形成，而且以含醣胜肽的129号残基为缬胺酸时，纤维的形成较容易。

To avoid the trouble to construct the basis functions, we introduce a Lagrange multiplier into the variational formulation to replace the constraint condition for the basis.

本文采用同样的思路用Galerkin 边界元方法求解带有约束条件的与第一类Fredholm 间接边界积分方程等价的变分方程，为避免构造基函数时约束条件的限制，我们采用Lagrange 乘子法，把约束条件放入变分方程中去，形成扩展的变分方程，用线形单元离散后求解。

The first conclusion infers the sufficient condition with the aid of thealgebra Riccati equation solution and the semi-group theory nature which the systemmay optimize;Next discussed when the system operator characteristic vector forms theRiesz base,causes control function concrete mathematical expression which its systemmay optimize;Finally summarized the system to be possible to optimize the researchnewest conclusion and the research forecast.

第一个结论借助代数Riccati方程的解及半群理论性质推导出系统可最优化；其次讨论了系统算子的特征向量形成Riesz基时，使其系统可最优化的控制函数的具体数学表达式；最后总结了系统可最优化研究的最新结论和研究展望。

In order to make use of time-frequency characteristic of signal,a new method of variational estimation on signal frequency by using AR model power spectrum estimation,designing band-pass filter to gain approximatively source signals and underdetermined mixed matrix,and constructing completed observation signals by expanded subspace primer vector is proposed.

充分利用信号的时频特性，提出了AR模型功率谱估计法滑动估计信号频率，设计带通滤波器近似获取源信号和欠定混合矩阵，以及扩展子空间向量基构造完备观测信号的方法，将问题转化为完备情况下的盲分离，最后运用FastICA方法实现了信号盲分离。

We found that during the first 24hours of treatment with PCE at the MSD , autophagy and vesiculation were induced in cultured GF .

在PCE 之浓度为 MSD 时培养约24小时后﹐人类牙龈纤维母细胞的颗粒内质网及高基氏体，几乎完全消失。

Therefore, we must know the temperature when the viscosity of the base oil.

因此，必须知道在工作温度时的基油粘度。

The results showed that the coating had a good capability when the polyester resin and DN-90 vulcanize additive were choosed. Its climate-retardancy reached for 2000hs,the wear data decreased to 0.038g,anti-temperature change was up to 20 cycle grade.

结果表明当选用某聚酯树脂C为基料、DN－90为固化剂时，制得的聚氨酯涂料耐人工加速老化时间可达2000小时，涂膜磨耗量可降至0.038克，耐温变20个周期后，检测结果合格。

When using water-soluble flux, special care should be taken to properly clean the boards.

在使用水溶性的助焊剂时，应特别注意基板的清洁。

We have discussed the basis set superposition error produced in calculating the weak interaction of molecular complexes.

对用从头算方法计算分子间相互作用时存在的基组重叠误差问题进行了探讨。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。