高频

Photodiode and photosensitive audion are a photoelectricity change semiconductor device , to have sensitiveness height , the high frequency function is good , the reliability energy is good , reliability is good , volume is small compared with photosensitive electrical resistor.

光敏二极管和光敏三极管是光电转换半导体器件，与光敏电阻器相比具有灵敏度高，高频性能好，可靠性能好，可靠性好，体积小。

The company was founded in 2000 dedicated to various brands of electronic components distribution, Main: ALTERA, Sanyo, Roma, Toshiba, Samsung, Philips, Pu-cheng, KEC, JRC, NEC, ST, OKI , Hetai, Motorola, RATO, AUK various brands of the world, such as in-line, SMD: IC, II, transistor, varactor, sound of tubes, field effect transistor, single bi-directional Thyristor and various photoemission tube to receive first-class components, widely used in car audio, car amplifier, car / home DVD, VCD, CD, MP3, Tuner tuner, LCD displays, and other fields.

本公司成立于二零零零年，致力于经销各种品牌电子元器件，主营：ALTERA ，三洋、罗姆、东芝、三星、飞利浦、普诚、KEC、JRC、NEC、ST、OKI，合泰，摩托罗拉，RATO，AUK等世界品牌的各种直插、贴片：IC、二、三极管、变容管、音响对管、场效应管、单双向可控硅及各种光电发射管、接收头等元器件，广泛应用于汽车音响、汽车功放、车载/家用DVD、VCD、CD、MP3、高频头调谐器、液晶显示器等领域。

In this engine, the double-byte inverted index is employed to build an inverted index table with every double bytes of the file name, the automatic classification of query results is used to establish a tree structure of query results based on the search topic, and the automatic error correction is adopted to construct a spelling mistake dictionary with the high-frequency search keywords in user query logs.

双字节倒排是对文件名中每两个字节建立倒排索引表，自动分类是对检索结果按主题划分为层次结构，查询自动纠错是以用户查询日志中的高频查询词为数据源构建拼写错误词典。

Fast Fourier transformation and autoregressive model estimation, are the most common methods used in the frequency domain analysis. The fluctuation in the highfrequency bands are mediated by parasympathetic control, whereas the fluctuation in the low frequency bands are mediated by both sympathetic and parasympathetic nervous systems. The origin of the fluctuation in the very low and ultra low frequency ranges are less obvious.

频域分析法一般是利用快速傅位叶转换或自动回规模型估计法，高频处的变异是由副交感神经系统调控，低频处的变异则是由副交感神经系统共同调控，至於极低频处与超低频处的变异，其原因尚待厘清。

For the tweeter,L3 acts as a shunt inductor and as an autotransformer to allow for differing levels of sensitivity.C2 is adjusted to keep the crossover frequency constant and R3 is there to prevent ringing,with R4 and C6 to adjust the frequency response at the upper end.

针对高音单体，L3的作用为一分流指示器与自耦变压器，以便区别灵敏度的等级。C2是用以调整保持分频点的衡定，而R3则用来避免铃振，并同R4与C6以调整高频端的频率响应。

Objective To evaluate the diagnostic value of high frequency ultrasonography in axillary lymph nodes metastasis of breast carcinoma.

目的 探讨高频超声在乳腺癌腋窝淋巴结转移诊断中的应用价值。

High-frequency welded TPU backstay construction for better durability and binding grip.

高频焊接聚氨酯backstay建设更好的耐用性和约束力的抓地力。

A series of problems in the latest developments of electronic bal

本文通过对一种380V高电压输入600W高频电子镇流器以及一种新型的低频方波电子镇流器的开发研究对高强度气体放电灯电子镇流器中的一系列问题展开了详细的讨论。

Its classical model of interior ballistics is established and a numerical simulation is conducted.

计算结果和实验结果很接近，表明该模型用于模拟超高射频火炮高频连发的膛内过程是可行的。

The spatiotemporal spectral line intensities of the first three atomic lines in Hydrogen Balmer series (λ=656. 28, 486. 13, 434. 05nm) of RF ion source plasma, are measured with calibrated Optical Multichannel Analyzer . Some plasma parameters, including electron temperature, hydrogen atom density and hydrogen ion density, are calculated and analyzed Using Partial Local Thermodynamic Equilibrium theory and Abel transform.

实验采用绝对定标后的光学多道分析系统测定了离子源等离子体不同时间和空间位置的氢原子巴耳末谱线系中前三条谱线（λ=656.28，486.13，434.05nm）的强度，并采用PLTE的理论和Abel变换方法，计算出了高频离子源等离子体的电子温度、氢原子浓度、氢离子浓度等参数在放电的不同阶段和径向分布情况，并进行了简要分析。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐