查询词典 radio-frequency spectrum

In view of that spectrum quantitative analysis of component concentration,and qualitative analysis of component recognition can not be carried out using the same model simultaneously during infrared spectrum analysis of the mixed gas,a method of mixed gas component infrared spectrum recognition based on SVM regression model is proposed.

针对混合气体红外光谱分析中无法采用同一模型同时进行混合气体组分浓度的定量分析和组分种类的定性分析的问题，本文提出了基于SVM回归模型的混合气体组分种类光谱识别方法。

Damage checking. To prove the load spectrum testing and research is correct, our load spectrum and AAR wagon load spectrum which 90.7 tons of high-sided wagon linear is transformed to 70 tons, the accumulated fatigue damage amount were compared under the same mileage.

损伤检验。为了证明本次载荷谱测试与研究的正确性，将实测和统计推断后的载荷谱，与AAR标准90.7吨高边敞车线性转化到70吨的载荷谱，在相同里程下疲劳累积损伤量，进行了比较。

In chapter 5, the frame of underwater target fusion recognition system is presented, the feature extracting module of LOFAR spectrum feature, envelop spectrum feature, third-cumulant diagonal slide spectrum feature, waveshape feature, are implemented in turn. The GBB based data fusion system is prsented in the last part of this chapter.

论文的第五章首先给出了基于多神经网络多特征的水下目标融合识别系统框架；然后描述了系统中LOFAR谱特征模块、包络谱特征模块、三阶统计量对角切片谱特征模块、波形结构特征提取模块的实现过程；最后首次构造了基于通用黑板的融合识别系统。

The paper mainly researched the peak to average technology of the MC-CDMA system and realized the baseband design. It proposed the optimal condition of the spectrum code in the MC-CDMA system, and considered the peak value factor of spectrum code, the correlation characteristic, and the spectrum correlation characteristic.

论文主要研究MC-CDMA系统的峰平比技术及实现了基带信号处理，提出了在MC-CDMA系统中采用扩谱码的优选条件，即同时考虑扩谱码的峰值因子、相关特性、和谱相关特性。

The theoretical results show that,compared to the source spectrum,the normalized spectrum in some points of the diffracted field is blueshifted,and in the other points of the diffracted field the normalized spectrum is redshifted.

理论研究结果表明：部分相干光谱经单缝衍射后，在衍射光场的某些点，光谱相对于光源的光谱往短波方向移动，即为蓝移；而在衍射光场的另一些点，光谱呈现红移。

The spectroscopic analysis carried on Ni-based alloy visible spectrum with grating spectroscope and prism spectroscope and color spectrum had been taken, characteristic of visible spectrum was studied in Ni-based alloy.

摘要使用光栅看谱镜和棱镜看谱镜对镍基合金可见光谱进行看谱分析，摄制彩色图谱，研究基体元素镍和各成分元素的可见光谱特征。

On this condition, some useful features have been found in the space domain. Wavelet spectrum estimation method has been used to extract the features in the space domain because the wire rope signal is a kind of none-stable signal. In order to discuss the physical meaning of this method, this dissertation proposes the relationship between Fourier spectrum and wavelet spectrum.

为进一步进行特征提取的需要，根据钢丝信号属于非平稳信号的事实，对信号给出了小波谱估计，以及Fourier谱和小波谱之间的关系和有效的小波谱计算方法，并在对实际钢丝信号小波尺度谱分析的基础上，给出一种信号的小波谱量化的方法，提取了信号的小波谱特征。

It is included the energy spectrum and angular distribution of hot electrons generated by ultrashort laser-solid interaction, the effect to electron behavior of electrical conductivity of target material, the hot electron activities and plasma characteristics in various plasma scale length, the rule of electron movement related to the high harmonic generation in gas, the excelled calculation about the condition of high harmonic generation, the study of electron spectrum and ion spectrum generated by Coulomb explosion in laser cluster interaction.

其中包括超短脉冲激光与固体靶作用中超热电子的能谱和角度分布，靶材料的电导率对电子行为的影响以及在不同的密度标长条件下超热电子和与电子相关的等离子体特征；超短脉冲激光与气体靶相互作用中与高次谐波相关的电子的具体运动规律和产生短波长高次谐波的优化条件；超短脉冲激光与团簇原子相互作用中通过对电子的隧道电离而引起的库仑爆炸等。

While calculating Sr spectrum by BSCR method we find: calculating the spectrum of Sr we can obtain pretty good results in low resonance energy if we use optimized β value of Ca directly, but it is not possible to obtain the ideal results in the part of high resonance energy spectrum.

我们使用BSCR方法计算Sr光谱时发现：将Ca的各open channel所对应的β值直接用在Sr的光谱计算时，在低能阶部分可得到相当错的成果，但是在高能阶时，则无法得到想的光谱。

By the use of standard substance, a standard spectrum library was established for 10 drugs, metformin, ephedrine, pseudoephedrine, caffeine, phenformin, fenfluramine, indapamide, phenolphthalein, fluoxetine and sibutramine. The identification for illegally added drugs was performed by comparing the accordance of retention time and the three-grade mass spectrum with the standard spectrum library.

利用标准物质建立10种药物（二甲双胍、麻黄碱、伪麻黄碱、咖啡因、苯乙双胍、芬氟拉明、吲达帕胺、酚酞、氟西汀、西布曲明）标准谱库，通过与标准谱库保留时间和三级质谱图的比较对非法添加的药物进行定性鉴别。

The use of the web to spread fears that flicking the switch on the LHC could create a Black Hole that could swallow up the Earth particularly concerned him, he said.

他说，使用互联网散布恐慌说启动LHC会生成一个可能吞噬地球的黑洞的做法让他感到忧虑。

Not a single word have I written down.

我一个字也没有写下来。