查询词典 frequency

The most efficient and most common circuit for radio-frequency selection and amplification used in radio receivers is the superheterodyne.

最高效率和多数最共同的电路为radio-frequency 选择和放大作用被使用在无线电接收机是超外差收音机。

As an important component, VHF(Very High Frequency Radiotelephony) subsystem utilizes the speech communication to ensure the VTS system has its basic function.

作为VTS系统的一个重要组成部分的VHF(Very High Frequency Radiotelephony)通信子系统通过语音通信来保证VTS系统具备其基本的功能。

An ideal helix plasma antenna operating in the Ultra High Frequency band is studied in the paper.

提出了一种工作在超高频(Ultra High Frequency， UHF)的理想等离子体螺旋天线。

In gas insulated switchgear the partial discharge causes ultra high frequency electromagnetic wave signals within the switchgear body.

气体绝缘组合电器(gas insulated switchgear，GIS)中的局部放电在腔体中产生超高频(ultra high frequency，UHF)电磁波信号。

The technology of Radio Frequency Identification has been recognized as one of the top 10 technologies in the 21st Century. This Paper is taking as from a Electro-Optical company's point of view, considering how RFID systems would, under most economical and effective conditions, establishes a partial miniature RFID systems within an enterprise yet still keeps the vertical upwards or downwards expansion mechanism.

中文摘要无线射频辨识系统（Radio Frequency IDentification，简称RFID）技术被公认为21世纪十大重要技术，本论文以一个光电公司的角度思考RFID系统如何在最经济与确保有效的状况下，在企业内建置一套局部小型的RFID系统，并保有可垂直向上与向下扩充的弹性机制。

The subglottal pressure was measured directly by cricothyroid membrane puncture; meanwhile, fundamental frequency, vocal intensity, phonation time and air flow rate were recorded simultaneously. The glottal resistance, the subglottal power, and the glottal efficiency of the phonation could be calculated from the data obtained above.

测试方法是以环状甲状膜穿刺法测量声门下压力，并且同时记录音声的基本频率（funda-mental frequency）、强度、发声时间及气流速度，另外由这些数值可求出声门阻力及声门效率。

For orthogonal frequency division multiplexing systems in high-mobility environment, channel variations within one OFDM symbol will introduce intercarrier interference, thus lowering the system performance.

对於应用於高移动通讯环境之正交分频多工(Orthogonal Frequency Division Multiplexing， OFDM)系统，每一个OFDM符元期间的通道时变导致载波间干扰(Inter-carrier Interference， ICI)发生，使得系统效能降低。

The mutagenicity of seed powder and seed oil of transgenic CryIA cotton to mammals and fish was evaluated in this study. The raw cotton seed powder or seed oil was mixed into mice and fish's diet. Cyclophosphamide and NaF were used as positive controls respectively. Regular cotton seed powder and seed oil were used as negative controls. The micronucleus frequency in mice bone marrow polychromatic erythrocytes and in eripheral erythrocytes of Zebrafish were assayed in this study. The sperm malformation rate in mice was also investigated.

摘 要：分别以环磷酰胺和氟化钠作为阳性诱变剂，以普通棉的棉籽粉及棉籽油作为对照物，同时设阴性对照组，以成年封闭群昆明种雄性小鼠和斑马鱼为实验材料，将棉籽粉或棉籽油掺入饲料中饲喂小鼠或斑马鱼，检测小鼠骨髓嗜多染红细胞（Polychromatic erythrocytes， PCE）微核率（Micronucleus frequency， MN‰）和精子畸变率，以及斑马鱼外周血红细胞微核率。

The mutagenicity of seed powder and seed oil of transgenic CryIA cotton to mammals and fish was evaluated in this study. The raw cotton seed powder or seed oil was mixed into mice and fish's diet. Cyclophosphamide and NaF were used as positive controls respectively. Regular cotton seed powder and seed oil were used as negative controls. The micronucleus frequency in mice bone marrow polychromatic erythrocytes and in eripheral erythrocytes of Zebrafishwere assayed in this study. The sperm malformation rate in mice was also investigated.

分别以环磷酰胺和氟化钠作为阳性诱变剂，以普通棉的棉籽粉及棉籽油作为对照物，同时设阴性对照组，以成年封闭群昆明种雄性小鼠和斑马鱼为实验材料，将棉籽粉或棉籽油掺入饲料中饲喂小鼠或斑马鱼，检测小鼠骨髓嗜多染红细胞（Polychromatic erythrocytes， PCE）微核率（Micronucleus frequency，MN‰）和精子畸变率，以及斑马鱼外周血红细胞微核率。

The radio frequency performance curves of relay were obtained through simulation, and analysis of the equivalent circuit and the main factors which influence the insertion loss, voltage stand wave ratio and isolation of relay were discussed.

对其进行仿真分析得到继电器射频(radio frequency，RF)性能曲线，并讨论了影响继电器插入损耗、电压驻波比及隔离度的主要因素。

This is not an ordinary box, which is used as a background picture of the dialog box, very pretty.

详细说明：这可不是一个一般的对话框，它是用图片作为背景的对话框，非常好看。

Conceal me what I am,and be my aid for such disguise as haply shall become the form of my intent.

遮掩我的身份，帮助我，我的面具将成为我的目的。