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A closed-form solution of these equations is not available. Therefore, numberical methods are used for their solution.

这些方程的精确解是不可能的，但是可以采用数值方法来计算。

Without the need of traditional numerical optimization method, solution for particular numerical problem can be obtained by substituting numerical values of each coefficient into the symbolic solution.

有效子问题是指子问题的最优解中至少有一个是原问题的最优解，多余子问题是指子问题的最优解中没有一个解是原问题的最优解。 3）求解方面：在国内外首次提出了求解最优解的符号表达式的思想。

The contents of this course include: the mathematical basis of FEM, the generic solution principles and expressions of elastic mechanics issue, the construction of element and its interpolation function, iso-parametric element and numerical integral, solution of linear equations, some practical issues of FEM modeling, brief introduction to typical commercial FEM packages, FEM for truss, plate blending and shell, and FEM for heat exchange and dynamics.

课程内容主要包括：有限单元法的数学基础、弹性力学问题有限单元法的一般原理和表达格式、单元和插值函数的构造、等参单元和数值积分、线性方程组解法、有限元建模的若干实际问题、典型商用有限元分析软件简介、杆件结构力学问题的有限单元法、平板弯曲问题的有限单元法、一般壳体问题的有限单元法、热传导问题的有限单元法、动力学问题的有限单元法等。

With combination of analytic solution and numerical solution,it is helpful ...

通过解析解及数值解结合的方法，可加深对传质扩散本质的理解。

Validity of this method would be proved by the comparison between the analytical solution and numerical solution.

通过解析解与数值求解的一致性验证了该方法的有效性。

With combination of analytic solution and numerical solution, it is helpful in understanding the essential of mass transfer diffusion.

通过解析解及数值解结合的方法，可加深对传质扩散本质的理解。

The molecular structures of these two complexes in aqueous solution are different from those in the crystalline state. ESR and electronic spectra show that the structures of these complexes are octahedron in aqueous solution.

这两个配合物在水溶液中的结构均与其晶体结构不同，ESR和电子吸收光谱的实验结果表明，这两个配合物在水溶液中都是八面体构型。

When used alone, nepetalactone attracted mosquitoes to the trap of the olfactometer, however, when mixed with human odor or a L-lactic acid dichloromethane solution, nepetalactone inhibited the attractiveness obviously. Nepetalactone exhibited a spatial repellency, but was not an ideal topical repellent. DEET did not have the attractiveness to mosquitoes, and did not exhibit inhibition on L-lactic acid dichloromethane solution too, hut enhanced the attractivity of human odor to mosquitoes.

风洞定向行为测试结果表明，假荆芥内酯单独作用时，对蚊虫有微弱的引诱效果，但在人体气味及二氯甲烷L-乳酸存在时，可显著抑制这些引诱物对蚊虫的引诱效果，是优良的空间驱避剂；DEET对蚊虫无明显的引诱作用，对二氯甲烷L-乳酸溶液引诱剂也无明显的抑制效果，但可显著增强人体气味对蚊虫的引诱性。

Neutral fat or paraffin— Add 1 g of Stearic Acid to 30 mL of anhydrous sodium carbonate solution (1 in 60) in a flask, and boil the mixture: the resulting solution, while hot, shows not more than a faint opalescence.

中性脂肪或蜡：取硬脂酸1g，加入已装有30mL无水碳酸钠溶液(1：60)的烧瓶中，加热煮沸，产生的溶液在加热时不显示浑浊。

Methods Making 20% bleaching water solution by using 10% CP with Carbopol or PVP as carriers and 10% Opalescence. Experiment rats were perfused the bleaching solution by 5ml/kg via oral route continually for seven days, control rats were perfused distilled water according to equal standard, then combine clinical signs, food utilization rate and pathology to evaluate the short term systemic toxicity of the lab rats.

将以卡波姆或聚乙烯吡咯烷酮为增稠载体的10％CP和10%Opalescence漂白凝胶制备成20%的水溶液，实验组白鼠按5ml/kg经口途径给服，对照组按同等标准给服等量蒸馏水，持续7天，通过临床体征、食物利用率、体重相对增长率以及病理表现来评价受试材料的短期全身毒性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。