高频

Other conclusion include: the trip of transient protection must be locked when the power circuit breaker of transimission line operated,because the trip is incorrect at this time;the features of transient current and its energy is different between the fault and thunder over- voltage in transimission line,and them can be identified;the ratio of high frequency component of current in serise capaciters compensation line , SVC and HVDC system is far little than fault transient current, so all of them do not affect the working of trasient current protection.

研究了在串联补偿电容的输电线路上发生故障时，串联补偿电容的MOV非线性保护电路对暂态保护的影响。串补电容MOV保护电路的非线性电流高频分量含量很小。静止补偿器、高压直流输电系统换流器的非线性特性产生的谐波分量含量极少。仿真计算表明，在与暂态保护判据中高频分量对应的频率范围内，其电流对应的功率谱估计值大大低于线路故障时故障电流的功率谱估计值，因此它们都不会对暂态电流保护的正常工作产生影响。

Results: 5 protuberances from outside organ (aorta, n=2; spleen, n=1; gallblader, n=1; left hepatic lobe, n=1) and 82 SMTs were detected by mEUS including 45 leiomyomas (esophageal, n=38; gastric. N=7), 17 benign strornal tumours. 6 malignent stromal tumours in stomach. 4 Jipomas (esophageal, n=1; gastric, n=3), 3 varices in gastric fundus. 4 etopic pacreaces in stomach 3 cysts in duodenum. 19 leiomyomas derived from muscularis mucosa, 4 lipomas and 3 cysts derived from suhmucosa were resected by endoscopic snare cauterization. 3 varices in fundus were treated by nylon ligation. 5 malignent stromal tumours were resected surgically. Of which 30 were identified by pathology except 1 malignent stromal tumour was misdiagnosed as leiomyoma by EUS.

结果：mEUS检查的87例患者中，发现消化道壁外压迫5例（其中主动脉弓2例，脾脏1例，胆囊及肝左叶各1例）；粘膜下肿瘤82例，包括平滑肌瘤45例，良性间质瘤17例，恶性间质瘤6例，脂肪瘤4例，静脉瘤3例，异位胰腺4例，囊肿3例。19例起源于粘膜肌层的平滑肌瘤行高频电切除术切除，3例静脉瘤行尼龙圈套结扎，4例脂肪瘤及3例囊肿行高频电切除。5例恶性间质瘤行手术治疗。1例平滑肌瘤，切除后病理诊断为恶性间质瘤，其余的病理诊断与超声诊断相符。

If we ask iron ore powder content of the final product particle size less than 100% of negative 80μm, its large particle proportion of mineral particles is relatively small, high frequency sieve sieve wear and tear is not serious under the premise of high-frequency vibrations can be used sieve for grading,Screen carried out under the magnetic separation of ore; sieve of coarse ore, return to re-grinding mill.

如果要求铁精矿粉最终产品粒度负80μm含量低于100%时，其大颗粒的矿粒所占比例比较少，对高频筛的筛片磨损不严重的前提下，可采用高频震动筛进行分级，筛下的中矿进行磁选；筛上的粗矿，回到磨机重磨。

The Skywave Over-the-Horizon Radar operates in high frequency band (3-30MHz) and employs the ionosphere to reflect signal to detect targets from the top down.

天波超视距雷达工作在3—30MHz的高频频段，利用电离层对高频信号的反射作用自上而下地进行目标探测。

The skywave Over-the-Horizon Radar operates in high frequency band (3-30MHz) and employs the ionosphere to reflect signal to detect targets from the top down.

天波超视距雷达(Over-the-Horizon Radar—OTHR)工作在3—30MHz的高频频段，利用电离层对高频信号的反射作用自上而下地进行目标探测。

Inevitably this is content-dependent, but you'll spot benefits on vocal articulations and plosives and pretty much any percussive sounds, plus a more rounded performance with low frequencies.

声音现代，适合一般用途，尤其适合想要增加人声、木吉他以及其他乐器高频的Air，中频很宽广，往高频渐渐收窄，使得麦克风摆位相对容易。

High frequency pulse tube refrigerator model based on physical mechanisms consider comprehensively working mechanism of pulse tube refrigerator.

基于物理机制的高频脉冲管制冷机模型全面考虑了脉冲管制冷机的工作机理，为高频脉冲管制冷机的优化计算提供了一个快速有力的工具。

If the safety support system is imperfect, disastrous loss or medical conflict will be caused. Users must be cautious in using and familiar with the safety and protection of the radio knife.

高频电刀的安全保障体系如果不完善、不可靠，将造成无法弥的损失，也会引发医疗纠纷，从而要求使用者必须严格注意和掌握高频电刀在使用中的安全与防护。

This paper presented the main functions and characteristics of Multisim8.0, and the main qualities of high frequency tunable amplifier such as voltage gain, transmission bands and selectivity were studied using simulation analysis and testing technologies of Multisim 8.0. The results are visual and precise, and prove the theory very well. This software has powerful simulation and analysis function, by which the analysis and design of high frequency circuit are not only more precise and credible, but also more closed to the real circuit running status.

本文介绍了Multisim8.0仿真软件的主要功能及特点，并结合该软件对高频单调谐放大电路的电压增益、通频带、选择性等主要质量指标进行了测试与仿真分析，结果直观、精确，很好地验证了理论，表明该软件有强大的仿真和分析功能，在实现高频电路分析和设计方面不仅高效、可靠，而且具有逼近真实电路的效果。

Based on both the strong-weak model and the strong-strong model, the instability caused by ions in equilibrium is simulated, some useful results are obtained. The results include the relation between instability growth rate and neutralization factor, the relation between instability threshold and neutralization factor, and the incoherent tune shift, the tune spread, the ion cloud distribution, the ion loss mechanism, as well as the ion accumulation limitation in the storage ring. With this understanding, we have carried out theoretical and experimental study for some ion clearing methods and their effects for the HLS ring. The minimum static clearing voltage is determined through calculating beam electric field and measuring ion current.

在上述基础上，我们对各种离子清洗的方法及清洗效果进行了理论和实验的研究：通过计算束流电场和测量清洗电极上的离子流来确定直流清洗电极所需的最小清洗电压；通过测量离子引起的频移来计算储存环的中性化系数；用模拟计算和实验测量证实了高频清洗能有效地克服储存环上离子俘获不稳定性；对由高频剔除系统形成的储存环部分束团填充模式下的离子俘获问题进行了初步研究，证实采用束团部分填充模式能在一定范围内克服离子俘获效应；并对各种离子清洗方法进行了比较。

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