分析试验

The influence of aniline concentration, feeding temperature and residence time on aniline diazotization in a spiral reactor was analyzed with orthogonal test and, in particular, the influence of feeding temperature was tested.

用正交试验方法分析了苯胺浓度、进料温度和停留时间等对螺旋管式苯胺重氮化反应工艺的影响，并着重试验了进料温度因素对反应的影响。

The results revealed that the conversion was 92.4% when aniline concentration was 1 mol/L, feeding temperature was 25℃ and residence time was 11 s. With feeding temperature being the main factor, the effect of residence time decreases successively. The diazotization anomalies could be caused at aniline concentration above 1.5 mol/L. The proper feeding temperature which can lead to the highest conversion was 20~30℃.

试验结果表明，在苯胺浓度为1 mol/L，进料温度为25℃，停留时间为11 s时反应转化率达92.4%；苯胺浓度、进料温度、停留时间对反应影响程度各不相同，其中进料温度的影响最大，停留时间次之，苯胺浓度高于1.5mol/L后，对反应影响加剧，导致反应异常；从进料温度对反应的影响试验分析可得，反应转化率最高的进料温度在20~30℃之间。

Based on the Sino-US Forest Health Cooperation Program, along with review on lots of foreign and domestic literatures, the historical trends of attributes of forest and the concept of health in the modern society are discussed and the concept of forest health is redefined, combining the methods of logic discursion with demonstration analysis, qualitative analysis with quantitative analysis and the ecology with other related science from point view of macro and middle scope aspects.

本研究依托中美森林健康试验示范区建设，结合大量的国内外文献分析，从中观和宏观角度，采用逻辑推理与实证分析、定性分析与定量分析、生态学和其他学科相结合等方法，讨论了森林属性的历史演变和现代健康观，对森林健康进行了重新的定义，首次尝试建立了基于中国林情的森林健康基本理论体系，构建了森林健康的评价方法，结合文献研究对城市森林、农田防护林、马尾松林、笋用雷竹林的健康评价进行了理论验证，并通过江西信丰崇墩沟流域森林健康评价进行了案例分析。

These phenomena and results of the test thus provide the clues and verifications for a proper calculating formula of columns distortional buckling strength.

这些试验现象和试验结果为ANSYS有限元分析以及压杆畸变屈曲承载力计算提供了线索和验证。

Through analyzing the data of tests, a rheological constitutive equation as a function of disturbing load and stress as well as time is established; and the constitutive equations are proven with test data.

通过对试验结果的数值分析，建立起以应力状态和扰动载荷及时间为白变量的扰动流变本构方程，并用试验数据对其进行验证。

On the basis of experimental research, this thesis applies 2-dimensional non-linear finite element method to the analysis of transient temperature field on the section by means of relatively high precision triangular element of six joints. When the temperature field is analyzed, finite element reseaus are divided in space field and finite difference reseaus are divided in time field, and then the program is compiled. The computing results are in good agreement with the test data. It indicates that the program is stable and precise.

在试验研究的基础上，本文采用精度较高的三角形六结点单元对构件截面二维非线性瞬态温度场进行了有限元分析，即在空间域内采用有限元网格划分，在时间域内采用有限差分网格划分，据此编制了计算程序，计算结果与试验数据符合较好，程序稳定性好，精度满足要求。

Tractor drawbar and noise test play an important role in theoretical study, performance analysis, quality appraisal of tractors.

拖拉机牵引和噪声试验是对拖拉机进行理论研究、性能分析以及对新产品作定型鉴定的最主要试验项目。

Under the condition of running on the hard soil pavement with the total train mass, the riding comfort tests of the tractor-trailer combinations with the stiff and the flexible drawgear have been performed, and the dynamics longitudinal force has been studied. When the flexible drawgear was used, the theoretical results and the experimental data showed that the peak value of the dynamics longitudinal force, the peak value of the RMS of the dynamics longitudinal force, and the PSD both of the dynamics longitudinal force and of the longitudinal acceleration decreased largely.

以平稳随机路面激励状况下满载行驶作为挂接车辆的经常行驶工况，进行了挂接车辆以刚性牵引架及不同柔性牵引参数的柔性牵引装置牵引运行时的平顺性试验，柔性牵引理论分析结果与试验结果均表明，使用柔性牵引参数值接近优化值的柔性牵引装置后，动态纵向牵引力的峰值、功率谱密度峰值及均方根值均有了大幅度的降低；主车和挂车的纵向振动加速度功率谱峰值也有了很大的降低。

Methods Clock drawing test, block design test and trail making test were conducted in 27 cases of early-stage PD,14 cases of MCI and 20 cases of normal control, respectively.

对27例早期PD患者、14例MCI患者及20例健康对照老人分别进行画钟试验、木块图及连线试验检查，并对结果进行分析。

By the dynamic strain response test and its wavelet analysis of the driving axle housing models with and without prefabricated cracks respectively, the feasibility of the crack detection method which is based on the wavelet multiresolution analysis and the modern spectrum estimation is demonstrated.

通过对微型汽车驱动桥壳有、无预制裂纹模型试样在瞬态激励下的动态应变响应试验和小波分析，论证了采用小波多分辨分析和现代谱估计技术，通过对小波分解所得到的各尺度下细节信号的频谱分析，检测结构裂纹故障的可行性。

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。