查询词典 spectrum

4 We show that the Dirac operator in an external field has the same essential spectrum as the free Dirac operator provided the potential vanishes at infinity.

在4.3.4节，我们证明了狄拉克算子在外场中有着对应着无穷远处时零势能极限的自由狄拉克算子的相同的本质谱。

The essential difference is that the spectrum analyzer, being designed for laboratory use, is designed to cover an extremely wide frequency range with widely adjustable tuning range, bandwidth, etc. It uses one or more sweeping local oscillators Fig.

区别在于频谱分析仪被设计成是实验室使用，设计成是带有很大可调范围和带宽等并覆盖非常大频率范围的仪器。

Photoshop CS4 Essential Training teaches a broad spectrum of core skills that are common to many creative fields: working with layers and selections; adjusting, manipulating, and retouching photos; painting; adding text; automating; preparing files for output; and more.

基本训练的Photoshop CS4的教导所共有的许多创造性的领域的核心技术广泛：与层和选择工作，调整，操纵和修饰照片，绘画，添加文本，自动化，准备输出文件，等等。

Looks from the system communication effect, this system has a higher antijamming, the anti-signal weakens ability, the system can achieve a farther transmitting range, simultaneously because the communications system essential part SC1128 (Spread Spectrum / solution expand chip) is specially designed according to the domestic low power line characteristic, the performance price is high, these are all advantageous to the system's promotion.

从系统的通信效果来看，本系统有较高的抗干扰，抗信号衰减的能力，系统可达到较远的传输距离，同时由于通信系统的关键部件SC1128是根据国内低压电力线特性而专门设计的，性价比高，这些都有利于系统在做进一步的完善后在国内自动抄表行业内的推广。

Nutra-Life Nutrimon's Children's Chewable Multivitamin: Is a pleasant-tasting chewable multivitamin and mineral supplement tablet for children over 2 years of age to provide a broad spectrum of the essential micronutrients growing kids need for good health.

3岁以上孩子：每天1颗，或根据健康专家建议服用。3岁以下儿童，请家长帮助减去鱼尾将精华液滴入宝宝的食物或者饮料中一起服用。最新鲜货源。存放于30度以下干燥通风处。（店主自译，欢迎指正，谢绝抄袭

In accordance with the actual project, this paper fully considers the comprehensive factors of speaker recognition system on the basis of explaining speaker recognition's principle, such as recognition rate, recognition speed, system stability etc. LPCC is used as the feature parameter. LPCC can reflect the esthesia feature of human in pronunciation and has offered a group of succinct speech signal model parameters which signify the range of frequency spectrum of the speech signal more accurately and the operation amount is not comparatively big. Combined vector quantization technology, the speech searched system has been developed.

本文依拖实际项目，在阐述说话人识别原理的基础上，充分考虑说话人识别系统的识别率、识别速度、稳定性等综合因素，采用能够反映人对语音的感知特性的线性预测倒谱系数LPCC 作为特征参数，LPCC 的重要性还在于，它提供了一组简洁的语音信号模型参数，这一组参数较精确地表征了语音信号的频谱幅度，而分析它们所需的运算量相对来讲却不大；同时结合矢量量化技术，成功开发出语音检索系统。

There are some important communications spectrum estimation theory, and has the foundation to have derived.

详细说明：里面的东西是通信中重要的谱估计理论，有基础，有推导。

With an angle-tuned etalon in amplifier, gain narrowing is alleviated and the spectrum is broadened.

五、论述了压缩器的结构及其原理，推导出了各阶色散量的计算公式，并计算了整个系统的色散补偿情况，给出了色散匹配与增益介质长度的关系。

The acetic ether extract has obvious antibacterial effect, also has broad-spectrum antibacterial activity.

了哥王乙酸乙酯提取物抑菌效果显著，具有广谱抗菌作用。

In Europe, ETSI (European Telecommunications Standards Institute) requires that two additional protocols be used in conjunction with 802.11a in order to protect incumbent applications and systems running over previously allocated shared spectrum.

在欧洲，ETSI要求两个额外的协议与802.11a一起使用，这是为了保护已经使用这一频段的其他应用和系统。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"