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Here mainly introduces five natures of the initial value problems, In several aspects summed up as the following : whether there are solutions to the problems, whether the only solution, the existence of solutions interval extent; Initial issues under what conditions have a solution--Cauchy - Piano existence theorem; how the district between the definition of a solution to open up a larger interval up; initial value problems for the sole condition --- Lipschitz conditions; 3、the numerical solution of the initial value problems of Ordinary Differential equations .

在这里主要介绍了初值问题的5个方面的性质，分别在这几个方面中总结了以下内容：初值问题是否有解，解是否惟1，解的存在区间有多大；初值问题在什么条件下有解----柯西-皮亚诺存在定理；怎样把在小区间上有定义的解开拓到较大的区间上去；初值问题解的惟1性条件---李普希茨条件；3：常微分方程初值问题的数值解法。

Procedure—Separately add 6.0mL of Ammonium Citrate Solution and 3.0mLof Potassium Cyanide Solution to the Standard solution and the Test solution.

步骤－将6.0ml的柠檬酸铵溶液和3.0ml的氰化钾溶液分别同时加入至标准溶液和测试溶液中。

Based on the existence condition of the solution for singular ordinary differential systems,the existence condition of the solution of the degenerate neutral differential system as well as the general solution are obtained by defining the solvable matrix pair and fundamental solution and using Laplace transformation.

讨论了对于退化矩阵E不是方阵情形的一般退化中立型微分系统的解，基于退化的常微分系统解的存在性条件，通过定义可解阵对和基础解以及利用拉普拉斯变换，给出了一般退化中立型微分系统解的存在性条件以及通解表达式。

These weight matrices are actually the least solution matrix and all maximal solution matrices of the min-implication fuzzy relation equation, respectively. The complete solution set of min-implication fuzzy relation equation can be determined by the maximal solution set of this equation.

同时给出了严格的定理证明：这些连接权矩阵分别为对应的最小-蕴涵合成模糊关系方程的最小解和所有极大解，从而得到了此模糊关系方程的完备解集。

After the formalization of the RMA problems, methods for normalizing the original stochastic decision matrix are proposed. For discrete RMA problems, the concepts of C-type solution and S-type solution are defined, and the inclusion relations between different sets of solution in the same type and between different sets of solution in different types are concluded. For continuous RMA problems, the decision analysis based on Dα-dominance relation is illustrated.

在对风险型多属性决策问题进行形式化描述之后，按照离散和连续两种情况，分别给出了风险型多属性决策属性数据的预处理方法；对离散风险型多属性决策问题，定义了C-类解和S-类解，并给出了各类解集之间的包含关系；对连续风险型多属性决策问题，给出了基于Dα优势关系的分析方法。

The enthalpies of solution and the thermodynamics of styphnic acid 2,4,6-trinitroresorcinol the solution solved in DMF were studied.The enthalpies of TNR solution with different concentrations were measured by a SETARAM C80Ⅱcalorimeter at 298.15 K and the empirical formula for enthalpies of TNR solution is calculated by polynomial simulation on the computer.

应用微热量热仪测定了斯蒂芬酸在溶剂N，N-二甲基甲酰胺中不同浓度时的溶解焓，用计算机拟合的方法求得计算该物质溶解焓的经验公式(ΔsolH=-14.392-988.6b+34.992b1/2)。

Objective TO compare the different changes of blood lactate and blood gases when given the lactated Ringer's solution and acetated sodium solution during operation. Methods 40 patients are divided equally into the lactated Ringer's group and the acetated sodium grouprandomly,adapting the combined intravenous and inhalation general anesthesia. The lactated Ringer's gis given in group L and the acetated sodium in group A. Neither groups are cross-given other crystal solution during operation, polygeline is the only colloid solution in both groups.

目的 比较术中输入乳酸钠林格液和醋酸钠林格液血乳酸盐及血气的变化方法 40例择期手术患者按随机字表随机分乳酸钠组和醋酸钠组，每组各20例，采用静吸复合全身麻醉。L组术中输入乳酸钠林格液，A组术中输入醋酸钠林格液，两组术中不交叉输入其他晶体液，输入胶体液均为菲克血隆。

Research on the solution chemistry of Al-V-Mo system in aquous solutionAccording to the calculation of solution chemistry,the solubility and existing status of Al,V and Mo in acidic and alkalic solution had been analysed in theory.The concentration logarithmic diagram of Al-V-Mo in aquous solution with different concentration and pH had been plotted,the concentration and pH on the distribution of three elements had been analysed.

铝、钒、钼水溶液化学性质的研究：采用溶液化学计算方法对铝、钒、钼体系进行了计算，从理论上分析了铝钒钼在酸性和碱性溶液中的存在状态和溶解性能，绘制了不同浓度及pH条件下铝、钒、钼水体系的优势组分图，分析了离子浓度和pH值对体系中各离子分布的影响，为水溶液中铝、钒、钼的分离技术的选择提供了基础。

By teaching material medium operation method has a test, be in 3 tube of amylase solution and 3 tube of amylaceous solution in boiling water in the meantime heat preservation 5min, the amylaceous solution that leaves this temperature again and amylase solution mix equably continue heat preservation 5min.

按教材中的操作方法进行试验，把装有淀粉酶溶液的3号试管和装有淀粉溶液的3号试管在沸水中同时保温5min，再把此温度下的淀粉溶液和淀粉酶溶液均匀混合继续保温5min。

Just prior to the analysis, prep a re the test solution by adding 0.5ml of the bromophenol blue indicator solution to each 100ml of the aqueous acetone solution and titrating with 0.01 N HCl or 0.01 N NaOH until the test solution is just yellow in color.

分析前准备好测试溶剂，100ml含2%水的丙酮加到锥形瓶中，加0.5ml 1%溴酚蓝水溶液指示剂，用0.01N NaOH溶液滴定至绿色或蓝色，然后用0.01N 盐酸标准溶液滴定至刚好呈黄色

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。