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According to the theory of harmonic motion,the cycle of the simple pendulum is analyzed by infinitesimal and experiment respectively,the formulation and the function curve of the cycle T altered with the location of the liquid surface are obtained,the law of pendulum cycle changed with the pendulum ball's mass reduced is showed more accurately and obviously.

根据谐振动理论，分别用微积分推导和实验测定的方法，分析了一类常见的关于摆球质量减少的单摆周期问题，得到周期T随液面位置h变化的函数关系式，以及周期T随液面h变化的曲线，较精确和直观地展示了因摆球质量减少而导致周期变化的规律。

The experimental results show that a small solar furnace with reflector area of 2m~2 can offer sufficient energy to a furnace with size of 60mm×40mm in a high temperature of 1000K,and this solar furnace can be used for heat-treatment experiment furnace.

太阳表面温度高达5 76 0K ，发出的能量辐射达3 9×10 2 3kW ，其中真正到达地球表面的能量为81万亿千瓦，这相当于全世界发电总量的数十万倍[2 ] 。

By the experiment and analysis, at the same shock pressure, the spall strength will increase with the strain rate, and it will decrease with the increasing thickness of samples.

通过实验与分析可知，在相同冲击压力下，层裂强度随拉伸应变率的增长而增长，随样品厚度的增加而减小。

Comparing the unsteady flow fields obtained by CFD with the measurement results with SPIV, it can be found that the CFD results can capture the main characteristics of the flow fields observed in the experiment results, however, the precision of the CFD needs to be further improved, and to predict the detail flow structures, such as the tip leakage vortex in the compressor rotor, by CFD still has some difficulties, thus, some work should be done to improve the turbulence model for more accuracy prediction of the flow fields by CFD for the complex flow in turbomachinery.

定常计算结果和非定常计算结果都不能很好地反映出转子叶尖泄漏流，转子尾迹和泄漏流在静子通道中的演化，及其与静子的相互作用等复杂流动情况。开展叶轮机适用的湍流模型研究，对于提高叶轮机内部复杂流动数值模拟的准确性具有非常重要的价值。

Detailed work have done at four aspects as follows: the usage of SPIV in multistage turbomachinery; the study of compressor rotor tip complex flow with SPIV; the study of compressor stator tip complex flow with Rotor/Stator interaction and the detailed analysis and comparison of the unsteady flow field respectively obtained by CFD and experiment investigation.

详细本文主要以SPIV非定常实验测量和CFD非定常数值模拟为工具，研究叶轮机端壁复杂流动的一些机理性问题，围绕四个方面开展了叶轮机端壁非定常流动方面的研究工作：适用于多级叶轮机械使用的SPIV技术；压气机转子尖区复杂流动；动静叶干扰条件下压气机静子内尖区非定常流动；以及非定常数值模拟结果与非定常实验测量结果的对比。

Cuttage is a breed method in virescence seedling producing, In order to find effective cuttage measures. Gardenia jasminoides, Stephanotis floribunda, Nerium indicum, 3 rooting substrates and plant hormones NAA,IBA were tested in the cuttage experiment, meanwhile all the treatments were dealed with 2 kinds of humidity keeping measures: ones covered with plastic membrane, the others covered none.

扦插是绿化苗木生产中常用的种苗繁育方式，为了探索在生产上成活率较高的扦插措施，本试验以白蝉、非洲茉莉、夹竹桃为扦插材料，采用3种生根基质、以500mg/l NAA和IBA溶液速蘸插穗切口进行扦插生根试验；同时以覆盖塑料薄膜和不覆盖薄膜进行保湿处理对比。

Comparatively sundried flowers are more suitable to be extracted as an industrial material although the concrete yield of fresh flowers is a little more. At the same time the experiment process fully proves the selectivity of SFE-CO2. Low temperature and low pressure are suitable to extract concrete from natural flavor and fragrance;(2) The materials prepared to extract rutin are the flowers that are gotten rid of concrete by SFE-CO2. The extraction methods include the SFE-CO2 modified by alcohol, the method of hot alkali-precipitate with acid, and alkaly dissolving and acid subsiding combined with microwave or ultrasonic.

66%；产品运用GC-MS做了鉴定；虽然鲜花浸膏产率较高，但干槐花的物料状态更适合工业生产；同时实验过程充分体现了SFE-CO2的选择性，低温低压条件适合香料的SFE-CO2；(2)以超临界CO2(Supercritical CO2，简称SC-CO2)萃取过浸膏的干槐花为原料，运用夹带剂修饰的SFE-CO2、超声或微波或直接加热的碱溶酸沉法提取中药--芸香甙，相比之下，夹带剂修饰的SFE-CO2和超声辅助的碱溶酸沉法提取效果较好，芸香甙提取率分别为2。

We transforms the special linear system of strict inequalities into three kinds of minimax problems, and then solves it with the aggregate function method assisted with some corresponding method. At last the numerical experiment is done under the environment of matlab.

我们将其转化为三种形式的Minimax问题，对转化后的三种Minimax问题，用凝聚函数法分别将其目标函数光滑化，并分别用带Armijo不精确线搜索的最速下降法、带自适应参数修正的凝聚函数法以及既约梯度法来求解。

The experiment was investigated on the exit flow fields of compressor cascades with normal straight, positive leaned, positive curved, negative curved, and S type curved blades with tailboard at zero incidence.

进行了带尾板的由常规直叶片、正倾斜叶片、正弯曲叶片、反弯曲叶片、S形叶片组成的 5种矩型压气机叶栅在低速风洞上的实验研究，测量了叶栅出口流场，分析了零冲角下不同叶片弯曲形式对叶栅出口总压损失分布情况和主流速度的影响。

Analysing ustiloxins inhibiting plant cell mitosis The inhibition experiment of growth of garlic radicle showed that there were more cells in the telophase stage in the garlic radicle dealed with culture filtrate of Ustilaginodea virens than those dealed with H2O. The cell volume of the former was bigger than that of the latter. So it seemed that ustiloxins could inhibit the cell mitosis, but not in the cell elongation.

毒素对植物细胞分裂的抑制作用分析：用大蒜根尖做抑制试验，发现用稻曲病菌培养滤液处理过的大蒜根尖呈分裂末期的细胞数目明显多于相同条件浙江大学硕士学位论文下对照的数目，抑制率为69%，且细胞明显比对照的细胞大，说明毒素抑制根尖细胞的有丝分裂，但不能抑制细胞的伸长。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。