实验法

This article discussed the voltage observed value which is showed by the digital milli-voltage table with the corresponding time relations in the "flat stable state method measuring the thermal conductivity coefficient of bad conductor" experiment,using the Excel program to find asymptotic lines,in order to resolve heat radiation rate with the derivative method.

本文讨论了在"用平板稳态法测量不良导体的导热系数"实验中，对实验过程中数字毫伏表显示电动势测量值与相应的时间的关系，利用Excel程序求渐近线，再求其导数以求散热速率的方法。

Many influential factors of this method were analyzed. The experimental results indicated: the mole ratio of urea, sodium hypochiorite and sodium hydroxide was controlled within the range of (1.10~1.12):1:(2.30~2.42), the temperature of low temperature reaction must be controlled under 20℃, the high temperature should intensify fast to backset current temperature while reacting and the time for raising temperature only within 5min, and the yield of hydrazine hydrate can be reach about 75.1%.

实验分析了尿素法生产水合肼的各种影响因素，实验表明，尿素、次氯酸钠与氢氧化钠的摩尔比为(1.10~1.12)：1：(2.30~2.42)，低温反应温度控制在20℃以下，高温反应阶段快速升温至回流后反应5min左右时，水合肼收率可达75.1%左右。

This paper will analyze the mechanical performance of the wheel and design a test-bed to test the performance of the lunar rover's wheel. Firstly, the mechanical characters of the soil are separated to press-sinkage character and shear character based on Bekker's theory, and common press-sinkage and shear models are introduced and the theory of Lankine passive earth pressure is also introduced. These basic theories are helpful to construct model.

根据Bekker半经验法的基本思想，将土壤的力学特性分解为水平方向的剪切特性和竖直方向的承压特性，阐述了地面力学中常见的土壤的承压、剪切等力学模型，并引入了朗肯被动土压力理论，为建立车轮在松软土壤中前进和转向的力学模型奠定了基础，同时进行了实验土壤的剪切实验，测量了土壤的内聚力和内摩擦角等参数。

Methods The inter-leukin2activity was observed by MTT colormietric assay,the interleukin2receptor expression of lymphocyte mem-brane was examined by immunofluoresence technique and lymphocyte blastogenesis in peripheral blood was measured by morphologic observation.

通过体外实验，运用MTT比色法、免疫荧光技术、淋巴细胞转化试验等实验方法，检测白细胞介素2活性、淋巴细胞膜白细胞介素2受体含量及外周血淋巴细胞转化功能。

The heat loss coefficient is experimentally measured by using a calorimetric technique.

建立了利用量热法测热损系数的实验台，对一些蜂窝结构进行实验测定。

The phase of optical wave can be recovered by the intensity transport equation under the paraxial approximation For the optical system with diffraction limit, it is difficult to get the boundary radical slope of phase and sample in the circular domain boundary when using the intensity transport equation to recover the phase, consequently, we reviewed an algorithm mentioned in the reference ［4］, namely, the equation, computation domain and boundary condition are changed, then the phase is reconstructed by the multigrid method and corrected at last Moreover, the experiment system is set to testify the algorithm, and the recovered phase from the intensity data detected by CCD is compared with the result from phase retrieval algorithm, it is found that the phase reconstruction error can reach 017 λ in the case of non-uniform intensity distribution, as a result, the method is suitable for the phase recovery with low wavefront sensing accuracy.

在傍轴近似条件下，可以利用光强传播方程对畸变波前进行相位恢复。对于衍射受限的光学系统，很难获得相位的边界径向斜率值作为边界条件，此外，要获得精确的圆域边界采样值也并非易事。为了克服上述困难，进一步研究了相位恢复改进方法，即改变了方程的表示形式、计算区域和边界条件，并用多重网格法进行求解获得重构相位，最后再将其修正。为了验证算法的精确性，搭建了实验系统对算法进行实验验证，将由CCD探测的光强分布进行计算得到的相位分布与相位恢复算法的结果进行比较，证明在光强分布非均匀的情况下，该方法恢复的相位均方根误差能够达到017 λ，可以适用于波前传感精度要求不是很高的相位恢复。标签自适应光学相位恢复相位修正光强传播方程 adaptive optics phase retrieval phase correction intensity transport equation

The experiment,which uses the method of falling ball to measure viscosity coefficient of liquids,is one of the common physics experiments.

用落球法测定液体的粘滞系数实验是普通物理实验之一。

We suggest that instead of the general α0.5-V curve the α0-V curve be used to determine the fiber parameters, where α0, and α0.5 are respectively the angles corresponding to the first minimum and the main lobe half power point of the radiation pattern.

此外，还研究了平面检测器探测球面波束以及用"两点法"测量角宽等问题。实验中，建立了两套测量系统，在O.63μm与1.32μm波长处，测量了单模光纤参数，给出了实验结果，并与其它方法的测量结果作了比对。

The diameter of cupper and powder which receives ball milling for 50 h, 80 h, 100 h, and 120 h is about 300 nm, 140 nm, 70 nm, 30 nm respectively in ball form; paraffin can evenly cover copper particles. nanometer composite ; metal ; polymer ; high energy ball milling

本文采用高能球磨法研制纳米金属粒子/有机物复合材料功能，着重分析讨论该复合材料的微观形貌特征以及制备工艺对微观形貌特征的影响，为该类无定形功能复合材料的研制作些初步的探索。1 实验材料与方法实验

Moreover the cyclic redundancy check algorithm is used for the data protection.

最后，给出了高强度聚焦超声手术治疗时所需的控制参数，和数据调用的实现方法，以及用于数据保护的循环冗余校验算法；随后介绍了16阵元相控阵换能器的声场实验装置和实验结果，并与理论仿真结果进行比较分析，验证了前文提出的超声声场计算综合方法的正确性和可行性。

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。