查询词典 spectrum analysis

The mineral constituents of the precipitates are confirmed to be lepidocrocite, calcite, whewellite and hydromuscovite under the polarized microscope and through infrared spectrum analysis.

在偏光镜下和通过红外光谱分析确认沉淀物为纤铁矿、方解石、水草酸钙石和水白云母等。

The results showed that the addition of the rare earth alloy powder can refine and disperse oxide particles. Through energy spectrum analysis, it was found that the rare earth congregates to Ti and the interface between metal matrix and diamonds. The active La and Ce in alloy powder can reduce the oxide film on Ti particles, increase the reactivity of Ti, and promote the reaction between Ti and diamond.

通过扫描电镜，能谱分析和X射线物相分析、比较和归纳，发现加入适量的稀土-Ni合金粉，使胎体中的氧化物颗粒细小、弥散；在添加稀土合金粉的胎体中，稀土向Ti富集并向金刚石与金属基体界面偏聚。

For sample hot rolled at 850℃ with the thickness reduction of 80% after solution treatment, there were Fe-Cr-Mo phase present in it through backscattered electron image and energy spectrum analysis. The Fe-Cr-Mo phase redissolved at 900℃ showed that it is a kind of low-temperature phase.

借助背散射电子像及能谱分析发现，经固溶处理后在850℃轧制80%变形量的试样中有Fe-Cr-Mo相析出，在随后的900℃保温淬火后该析出相溶解，表明其为低温析出沉淀相。

Quantum dot; nano-SiO_2; DNA; acridine orange; organic dyes; silver ion; copper ion; spectrum analysis

论文导师常希俊，论文学位博士，论文专业分析化学论文单位兰州大学，点击次数 2，论文页数 141页File Size7980K

The study on spectrum analysis of arc sound signal has showed that a signature band of 5-10kHz of sound wave would be generated before fault s arc take place, which is strong in intensity and variable in both width and center depending on arcing electrodes, space between electrodes, and discharge volt age.

早期弧声的功率谱分析表明，故障电弧发生之前，在可听波段产生5kHz~10kHz的电弧声，其带宽和中心频率与电极形状、放电距离、放电电压等试验条件有关。

Aiming at the toughness fluctuation of the high grade thick plate pipeline steel submerged arc welding.SEM and energy spectrum analysis had been used to analyze weld microstructure, appearance of impact fracture,composition segregation,weld inclusions,welding wire purity,etc..

针对这种高钢级厚板管线钢埋弧焊接条件下出现的焊缝韧性波动，采用SEM、能谱分析等对焊缝微观组织、冲击断口形貌、成分偏析、焊缝夹杂物、焊丝纯净度等进行了分析。

The resolution is improved through optimal combination of bin attributes which are small offset, small bin, wide azimuth, large off-inline distance and high coverage. Then the "feature net" of near surface conditions was created, and the "sudden transition" of near surface variations was found to provide reliable foundation for optimum shooting parameters selection. The effective methods of spectrum analysis were generalized. It is concluded that the target is satisfying sand body interpretation, not pursuing high frequency.

通过较小炮检距、较小面元、较宽方位角、较大非纵距和较高的纵、横向覆盖次数等面元属性的优化组合，提高了该区地震资料的分辨率；建立了表层条件&特征网&，通过寻找表层变化&突变带&，可为最佳激发因素的选取提供可靠依据；总结了频谱分析的有效方法，提出要以砂体解释的需要为目标，避免陷入盲目追求高频率的误区。

The modified calcium sulphate whiskers were characterized with activation index,contact angle,SEM and IR spectrum analysis,and the results indicated that the borate surfactant SBW-181 has go...

建立了硼酸酯表面活性剂SBW-181与硫酸钙晶须的作用模型。得出的结论对硫酸钙晶须表面改性的工业化生产具有重要的指导意义，并为硫酸钙晶须的应用研究奠定了理论基础。

The dissolution mechanism of Zr-DBP crud in Na_2CO_3 solution is studied by both infrared spectrum analysis and extraction of Zr-DBP cruds by quaternary ammonium salt in Na_2CO_3 solution.

用红外光谱分析和季铵盐萃取研究了ZrDBP界面物在碳酸钠溶液中的溶解机理。

The Hilbert modulus is defined as the sum of the square of a signal and its conjugation.Hilbert modulus is used to covert the fundamental component in original phase current to direct current component,the fault characteristics frequency of bar break is transformed into the twice slip frequency.The problem is solved that fault characteristic component in the spectrum analysis of the current is easily to be blanketed by fundamental component and is hard to highlight fault characteristics.

将Hilbert模量定义为原始信号与其共轭信号的平方和，利用Hilbert模量将原相电流中的基波分量转变为直流分量，原频谱分析的转绕组断条的故障特征分量转变为频率为二倍转差频率的电流分量，决了相电流频谱分析方法中断条故障特征成分容易被基波湮没而难以突出故障特征的问题。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。