查询词典 fractional derivative

Furthermore, in order to greatly improve computational efficiency, another topological optimization method, named as a topological derivative and level set algorithm for topology optimization, is also proposed by unifying topological derivative theory with the level set method.

同时，又将拓扑导数理论和水平集算法结合起来，提出了结构拓扑优化的拓扑导数与水平集算法，进一步提高了计算效率。

On the basis of the mathematical model, the dynamic derivative of the aircraft at the different angles of the tailplane was analyzed using the technique of dynamic derivative simulation.

在非定常建模的基础上，采用动导数仿真，分析了不同平尾偏角时的动导数，结果表明，水平尾翼偏角主要对零动态阻尼所对应迎角有较大影响，随着舵偏角的增大，该迎角减小。

The pressure derivative curve will upwarp because of the existence of the threshold pressure gradient and the fault. The identification of the type of "upwarping" in the pressure derivative curve is crucial to the selection of the well testing model.

启动压力梯度和断层的存在都会使压力导数曲线发生"上翘"，对压力导数曲线"上翘"类型的识别，是正确选择试井解释模型的关键。

The invention discloses a process for preparing N-Boc derivative or N-Cbz derivative of chiral alpha, alpha'-double substituent pyrrolidine which contains ethylenic link and acetylenic link substituent.

本发明公开了一种制备含烯键和炔键取代基的手性α，α'-二取代吡咯烷的N-Boc衍生物或N-Cbz衍生物的方法。

The fourth-derivative analysis was performed on the spectra to set up the uniform initial central wavelengths for excitation spectra of dinophyta and bacillariophyta,respectively,according to the position and number of maxima on the derivative spectra.

对其作四阶导数分析的基础上，根据导数光谱中出现的极大值位置和数量，对甲藻门和硅藻门的激发光谱分别设定统一的初始中心波长。

The databases of NIRDRS for Hypericum、 Eucalyptus globules and broussonetia papyrifera were established within suitable spectral ranges with three kinds of data block(original spectrum, first-order derivative spectrum and second-order derivative spectrum) to discriminate unknown samples.

分别用三种数据块(原谱、一阶导数光谱、二阶导数光谱)在不同的谱区范围建立了金丝桃、蓝桉、楮实子3种中药材的NIRDRS指纹图谱库，对未知样品进行鉴别。

The composition comprises: 35 to 65 wt % of an anionic detergent or surfactant selected from alkyl benzene sulphonic acids, alpha olefine sulfonates, long chain fatty acid sulphates, higher fatty acids, as well as the alkali metal and alkaline earth metal salts thereof, and natural detersive agents, and mixtures of any of these; 3 to 15 wt % of a non-ionic detergent or surfactant selected from alkoxylated alkyl phenols and alkoxylated fatty alcohols; 5 to 10 wt % of a water-swellable cellulose derivative or a salt thereof, wherein the cellulose derivative exhibits a viscosity of at least about 1500 cps, measured in a 1 % aqueous solution at 25 DEG C with a Brookfield viscometer having spindle 3, speed 30rpm, factor 40 for viscosities of 2500-3500 cps; 6 to 20 wt % of a solubility regulator selected from alkali metal and alkaline earth metal chlorides, carbonates and sulphates, aluminosilicates and starch; and 0 to 20 wt % of a fragrance or perfume in solid, liquid or microencapsulated form.

该组合物包含：a35―65％重量的阴离子洗涤剂，其选自烷基苯磺酸、α－链烯烃磺酸盐、长链脂肪酸硫酸盐、高级脂肪酸以及其碱金属和碱土金属盐和天然的去污剂，和任何这些组分的混合物；b）3―15％重量的非离子洗涤剂，选自烷氧基化烷基酚和烷氧基化脂肪醇；c）5～10％重量的水可溶涨的纤维素衍生物或它们的盐，其中纤维素衍生物按1％水溶液在25℃下用Brookfield粘度计（3号转轴，转速30rpm，2500―3500cps粘度的因子是40测定；具有粘度至少约1500cps；d）6―20%重量的溶解性调节剂，选自碱金属和碱土金属氯化物、碳酸盐和硫酸盐、硅铝酸盐和淀粉；和e）0～20％重量的为固体、液体或微囊包封形式的香精。

Based on the improved Atiken iterative method and dimidiate method, a new algorithm of searching zero of derivative function is given, the simulation results show that if using the new algorithm to find the zero of derivative function, the convergence speed is faster than the improved Atiken iterative method .

采用二分法预报、改进的Aitken迭代校正的方法，构造了一种求导数零点的一种新算法。新算法在迭代过程中不用计算导数，且二阶收敛。数值试验表明，该算法具有较高的精度和较大的初值选择范

Because a speech signal is produced by the interactions between the glottal flow derivative and human vocal tract, we assume that the speaker identity information is included in the glottal flow derivative waveform, in this thesis we setup some experiments to verify the assumption.

由於语音讯号的产生是由声门来源波型与人体口腔交互作用产生，而我们假设声门来源波型包含大部分语者生物特徵，进而以本论文中的实验加以验证。

Investigation of major metabolic pathways of SFZ-47 in animals The metabolites of SFZ-47 in rabbit urine following oral administration were separated and detected with HPLC and LC-MS methods. On the basis of the chromatographic behavior and mass spectra of the metabolites as well as biotransformation pathways of drugs with the partial structure of SFZ-47, the hydroxylic derivative 4-(3H-1, 2- dihydro-1-pyrrolizinone-2-methylamino benzyl alcohol and the carboxylic derivative 4-(3H-1, 2-dihydro-1-pyrrolizinone-2-methylamino benzoic acid of SFZ-47 were proposed as two potential metabolites and were synthesized.

在动物体内主要代谢途径的确定用HPLC和LC-MS对家兔口服SFZ-47后尿中的代谢物进行了分离、检测，根据代谢产物的色谱和质谱行为以及与SFZ-47有类似结构部分的其它药物的代谢途径，推测其羟基衍生物[4-（3H-1，2-二氢-1-吡咯里嗪酮-2-甲基胺基）苯甲醇]与羧基衍生物[4-（3H-1，2-二氢-1-吡咯里嗪酮-2-甲基胺基）苯甲酸]是两种可能的代谢产物，遂用化学方法合成了这两种衍生物。

Summary In copyright infringement cases,if the alleged infringer uses or even plagiarizes the copyrighted works or parts thereof,which causes no substantially adverse effect on the normal exploitation of the work,nor does it inflict any substantial damages to the right owner,the de minis doctrine should be applied to exempt the liabilities of the defendant and seek the balance of interests between the right owner and the general public embodied by the copyright law.

在侵犯著作权案件中，如果被控侵权行为人虽未经著作权人的同意，使用甚至抄袭了受著作权保护的作品或作品的片段，但若情节轻微，未对该作品的正常使用产生任何实质不利的影响，亦未对权利人的权利造成实质性的损害，则应适用&不计琐细原则&，免除行为人的责任，以寻求在权利人利益与著作权法所体现的社会公共利益之间的平衡。

This new product will become our best seller.

这个新产品会成为我们最畅销的产品。