实验研究

Besides, the author reaches a conclusion that the tone sandhis of the so-called Narrow Type does not exist on the basis of phonetic experimental analyses.

同时，对以往方言学的&窄用式&这一概念作语音学的实验考察分析，得出此概念不存在的结论。论文共分三章：第一章：上海方言声调的实验研究。

Methods Acute oral toxicity test, subchronic inhalation toxicity test and mutagenicity test were conducted to observe the effects of petroleum asphalt in experimental animals.

方法通过石油沥青急性经口毒性、亚慢性吸入毒性及遗传毒性的实验研究，观察在该实验条件下，石油沥青对受试动物的影响。

It is found that the two kinds of squeezing can be obtained at some conditions.and the interaction between atoms in BEC changes the period of fluctuation of light field and the amplitude of fluctuation of quadrature component.

由于BEC的独特物理性质及存在的广泛应用前景，BEC已成为一个十分活跃的理论和实验研究领域，实验上相继实现了原子激光，分子BEC等一系列重大进展[4~6]。

Revised and improved in this work are, the apparatus used to measure the critical parameters, vapor pressure, saturated liquid and vapor density; the Burnett apparatus used to measure the PVT properties; the apparatus used to measure the surface tension and the sealed capillary viscometer.

研制了新的临界参数与饱和蒸气压测量装置、 Burnett 法测量 PVT 性质装置等；改造了现有的表面张力与粘度测量等实验装置；对二甲醚的热物理性质进行了详细的实验研究。

Experimental research on a two-pole prototype motor shows that both oscillation and asynchronous operation may occur.

在实验研究中，发现二极实验电机有振荡及异步运行现象。

To overcome the drawbacks in the weight and cost of the antenna with the corrugated soft surface, a new patch antenna with patch rings is designed. Its weight is about 1/4 less than the antenna with the corrugated soft surface and it is inexpensive. Good experimental results are obtained. The radiation pattern of the antenna is more rotationally symmetric, and a more reduction on the sidelobe levels of the antenna is achieved as compared to the antenna with the corrugated soft surface. In conclusion, in the present thesis both theoretical and experimental research works have been carried out intensively on patch antennas based on photonic-bandgap structures.

为了克服皱褶软表面天线份量重，加工费用贵等缺点，我们对空气介质的皱褶圆环结构软表面天线进行了改进，将周期分布的皱褶圆环平面化，并保持结构的软表面特性，设计出了一种新的平面圆环结构的软表面天线并进行了实验研究，加工的平面圆环结构天线比皱褶圆环结构天线重量减轻了约1/4，加工费用大大降低，所取得的实验结果显示，该平面圆环结构软表面天线的方向图的轴对称性得到了改善，在俯仰角从0°～-90°的范围内天线H面的波束与E面重合，与皱褶圆环结构相比，天线的旁瓣和背瓣受到了更大的抑制，E面方向图上+120°方向的旁瓣被明显削弱。

Through the test on physical properties of snow and ice, the free-area ratio, the snow-melting velocity and the snow-melting time, the melting behavior of snow and ice under different weather conditions are obtained and compared with simulated results.

在此基础上，提出了一种有利于系统节能的折中加热方案。3道路融雪实验研究建立了一个小型道路融雪实验系统，采用基于径向热流的直接加热法获得了水泥混凝土路面的导热系数，并初步分析了含水率对路面传热过程的影响。

The relevant experiments illustrates A.C. power is more suitable for deicing or snow-melting than D.C. Silica fume can improve the dispersion of carbon fibers and then reduce the electrical resistivity of carbon fiber cementious composites. At a certain volume content, when the ratio of cement, sand and stone is l:l:2, the properties of the CFRC is the best on the whole.

大量实验研究发现：采用交流电是碳纤维导电混凝土用于融雪化冰时的最佳电源选择；采用硅灰能较好地提高碳纤维在基体中的分散性，有效降低碳纤维水泥基复合材料的电阻率；并在现有的级配比实验中发现了具有最好综合性能的配比，即在相同的纤维体积含量的情况下，导电混凝土的具有最好综合性能的配比是水泥、砂子、石子的重量比为1：1：2。

The experiment and the research indicate that:(1) Through the Hot-Continuous-Rolling production technics under small reduction ratio of 4.04 and 5.08, the rectangular continuous-casting billet of 235×265mm can be used to produce big size steel stick of Φ140mm and Φ 125mm whose macrostructure and mechanical properties meet the standards, this technics is viable;(2) This rolling technics can make the deformation penetrate to the center of the billet by low temperture and low velocity and big roller diameter and large reduction quantity at every pass and optimum design and arrangement of rollers, which is the key of Hot-Continuous-Rolling technics under small reduction ratio;(3) The sending technics used in Xining Special Steel Co.,Ltd can not use waste-heat of billet adequately, but the sensitive temperature section of A1N or sulphides or inclusions separating out is avoided, creating a favorablecondition for insuring good surface quality of final rolled steel;(4) The Hot-Continuous-Rolling technics under small reduction ratio has a close relationship with the billet quality control and the hot sending process control and the cooling control after rolling.

通过实验研究表明：(1) 235×265mm矩形连铸坯分别采用4.04和5.08的小压缩比热连轧生产工艺，所生产的Φ140mm和Φ125mm的大规格棒材，其低倍组织和机械性能均符合标准要求，该工艺是可行的；(2)本实验所采取的低温低速、大辊径大道次压下量轧制工艺加上轧辊孔型的优化设计与配置，可以使加工变形渗透到铸坯的中心，这一点是实现小压缩比热连轧生产工艺的关键；(3)西宁特钢在红送过程中虽然铸坯余热未能得到充分的利用，但是有效地避开了A1N、硫化物的析出及夹杂物偏析的敏感温度区，为保证最终轧材良好的表面质量创造了有利的条件；(4)小压缩比热连轧生产与铸坯质量控制，热送过程控制以及轧后冷却控制密不可分。

Five different mixing chamber geometries are tested experimentally with the stoichiometric gasoline-compressed air at frequency of 6 Hz and the effect of screw-pitch and inner diameter ratio on the performances of PDE is investigated.

实验针对爆震频率为6Hz、当量比为1的汽油和压缩空气混合气，实验研究了脉冲爆震发动机模型混合室内5种不同扰流螺纹螺距内径比对其性能的影响。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。