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The gas chromatography quantitative analysis conditions of gum rosin were studied by selection of chromatographic columns and chromatographic resolution conditions with the pure rosin sample of P.

用纯思茅松松香样品，通过选择色谱柱和色谱分离条件，研究确定了脂松香气相色谱定量分析的条件，定量分析了松香树脂酸的相对百分含量；定量分析数据通过统计学中的Grubb′s检验法进行误差检验，在确定的条件下脂松香气相色谱定量分析结果具有稳定性、准确性和复现性结果；对马尾松、湿地松松香定量分析也取得同样结果。

Saponification. Experimental conditions of saponification were optimized by orthogonal test. Under conditions of 60mL of ethanol, 3mL of 600g/L potassium hydroxide solution, 0.5g of absorbic acid, and saponifecation time 45min, the yield of tocotrienols from 5. 0g hull-less barley is the highest.

正交实验结果表明，在本实验条件下从裸大麦（5.0g）中提取生育三烯酚的最佳皂化组合为：无水乙醇60mL、600g/L KOH溶液3mL、抗坏血酸0.5g、皂化时间45min。

It is reported that there has been low-volume solar photovoltaic refrigerators abroad, but these products are underdeveloped in contrast with that in foreign countries, so it is necessary to give more detailed study on a solar PV refrigerator system. For one thing, it is very important for the improvement of the people's living conditions and medical conditions in the areas where the grid is unavailable, such as remote mountainous areas, pasture areas and some inlands and islets and so on. For another, the study will support the more comprehensive application of solar PV refrigeration in the future to certain extent.

太阳能光伏冰箱在国外已有小批量的产品，而在国内这方面的产品则显得相对落后，因此有必要对太阳能光伏直流冰箱系统进行更多的研究，一方面，这对给没有市电供给的边远山区、牧区、岛屿等地区配备必要的食品冷冻冷藏设备、药品疫苗冷藏设备，以提高这些地区人们的生活质量和医疗条件有重要意义；另一方面，为未来太阳能光伏制冷的广泛应用提供一定的理论支持。

In the process of impact of abrasive jet on rock, resulting dynamic stress plays an important role in rock destruction. The stress wave resulted makes local rock tensile and shearing, then makes rock destructed. In the conditions of some hypotheses, the mechanical model that rock is applied by stress wave, i.e. jet wave basic equations, are set up by wave theory, and the formula of the maximum normal stress resulted by stress wave is deduced according to known boundary conditions.

描述了岩石材料在磨料射流的冲击下破坏的主要原因，分析了应力波就是岩石局部受到拉伸和剪切并最终使岩石发生破坏的根本因素，在这一假设的前提下采用波动理论建立了岩石受应力波作用的力学模型即射流波动的基本方程，在已知的边界条件下推导出了由波动引起的最大正应力的计算公式。

The gap element method is proposed in the paper for two kinds of problems, which include contact problem and gap joint problem. Elasticity contact problem falls into the category of unknown boundary value problems. It follows that the contact area and contact conditions or states can never be determined without special mathematical analysis, which is a very difficult work. The boundary conditions of the contact surfaces are deduced.

文中给出了间隙元法在空间可动部件接触问题中的应用，推导了其几何边界条件和力学边界条件，利用虚功原理推导了含间隙元弹性接触问题的有限元方程式，给出了其数值解法的迭代步骤，并指出了利用间隙单元进行分析的特点。

The optimum culture conditions of the mixed microbial MBFH were: temperature was 30 ℃, initial pH 8.0, agitation rate 120 r/min, the concentration of glucose in medium 2%, relatively inoculation 15%, and under these conditions the maximal flocculating rate to kaoline suspension about 88%.

结果表明，混合菌MBFH产絮凝剂的最佳培养条件为：温度30℃、初始pH8.0、摇床转速为120r/min、培养基含糖量2%、相对接种量15%，其对高岭土悬浊液的絮凝率可达到88%。

The mathematical models for overall breaking process of circuit breaker are developed, through which the driving mechanism and the arc chamber, the interruption performance and the opening velocity are closely connected, the breaking process under different interrupting conditions are simulated, then the arcing time difference is determined. The interrupting conditions include line charge current, breaker terminal fault current and short line fault current .

本文建立了一种把操动机构与灭弧室相联系、开断性能与运动特性相联系、一维和二维模型相结合的压气式SF6断路器开断性能的仿真方法，对不同开断条件下（包括线路充电电流开断、不同试验方式的端子短路开断、不同试验循环的近区故障）断路器的开断过程进行了分析，用仿真的方法确定了断路器在不同开断条件下能成功开断的燃弧时差，并给出了开断性能与运动特性之间的关系。

Results show that in contrast to no-slip boundary conditions, slip boundary conditions would allow the displacement of contact line along the wall and have a more precise prediction of interface distortion without neglecting the wall effects.

由模拟结果可看出，相对於不滑动边界，滑动边界设定使壁面接触线可在壁面上移动，能有效预测流体界面弯曲变化情形，且不会忽略壁面之影响。

In this paper,the SMO-type lithium ion sieve was the main research object,the manganates and lithium salts were taken as the main raw materials.Two LISs with high uptake capacity,better selectivity and stable structure were successfully prepared by hydrothermal method and coprecipitation method based on the discussion of correlation between Li+ uptake performance and the preparation conditions of LIS precursors.The effects of preparation conditions on Li+ uptake were also investigated.

本文以SMO型锂离子筛为研究对象，以锰盐和锂盐为主要原料，在采用固相法探讨离子筛前驱体制备条件与离子筛提锂性能关系的基础上，分别采用水热法、共沉淀法为主要合成方法，成功制备了具有高提锂容量、选择性好及结构稳定的两种锂离子筛材料，并研究了合成条件对材料制备及提锂性能的影响。

It is concluded that the best charcoalization conditions for Moso bamboo were above 60% moisture content and 700 ℃. Under these charcoalization conditions, the charcoal had a significantly higher Methyl Blue Number (74.4 mg/g).

在本研究设定之试验条件范围内，孟宗竹较适宜之炭化条件为竹材含水率60％以上，炭化温度700℃，取材部位则无差异，所制得之竹炭，具有较高之甲基蓝吸附值（74.04 mg/g）。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。