极高频

The aim of the paper is to improve the reliability of HF generator, which is the key to decide the life of HF electrodeless light. At first, I collect and analyze the relative dates, and statistics fault models.

首先进行了与可靠性相关的数据收集与分析，对故障模式进行统计；然后从电路结构、环境应力及容差三个方面进行可靠性分析，从而为关键的可靠性设计提供了依据；接下来的可靠性设计，从电路设计、热设计、降额使用、筛选四个方面逐一解决了可靠性分析阶段发现的问题；最后，我将改良的发生器批量生产，并从中重新收集了可靠性数据进行计算，事实证明改良后高频无极灯的平均寿命已达到6万小时。

The length of bulb high-frequency connecting line cannot be randomly cut short or extended; otherwise it may affect normal operation of the electrodeless lamp.

灯泡高频连接线长度不可随意剪短或延长，否则会影响无极灯的正常使用。

Besides, the diode connected inductive peaking circuit which is attached to the output of a multiplexer can enhance the performance at high frequency.

除此之外，在三态反相器的输出端接上一个二极体式的电感性增益电路，可以提升讯号在高频的表现。

Deep facial lifting treatment top program: With high fragrance and high effective heat energy, the temperature reaches 60 -70 ℃, constantly promote the regeneration and reconstruction of collagen in deep skin, generate plenty of ossein with the function of instantly firming skin and removing wrinkles.

深层拉皮治疗一极程式：利用高频高效热能，温度加热到 60-7 0 ℃，不断刺激皮肤深层胶原重生、重组、产生大量新增骨胶原，令肌肤即刻猁收紧，祛皱的效果。

The mega crystal of Fluorphlogopite Mica produced by the company is the only domestic product, which is good at heat-resistant, anticorrosive with low loss of high frequency medium, high body resistivity, good photopenetrativity, transparence, divestivity, elasticity, unaging, infragility, etc, and mainly applied in the environment of high frequency medium, high temperature vacuum, strong acid and alkali substituting for polyquadrifluorethene, crude mica and quartz glass and other materials.

所研制的氟晶云母大晶体在国内属唯一产品，该产品是一种集耐高温、抗腐蚀、高频介质损耗低、体电阻率高、光波透过率极佳等优点于一身的新材料，并具有透明、可分剥和富有弹性、不老化、不易碎等特性。

Based on the model,the relationship between the main pulse frequency of supply power and the balanceable inter-electrode gap is discussed.

给出了脉冲电化学加工极间平衡间隙的数学模型，并据此讨论了高频群脉冲电化学加工中，电源主脉冲频率与平衡加工间隙的关系。

The permo-carboniferous coal measures in North China Basin were formed under the condition of epicontinental sea which was characterized by the extreme gentle slope and high frequency of sae-level changes, the contemporaneous margin portion of which was probably very far or had been destroyed during the proccess of plate subduction and continental collision. The lowstand systems tract, therefore, has not be discovered up to now.

华北晚古生代内陆表海古地貌上表现出的极缓的基底和海平面的高频变化，具有特殊性，其同期的边缘海部分可能距离很远或在板块消减及大陆碰撞过程中被破坏掉，因而至今未发现低位体系域存在的证据。

High frequency ultrasound provide important evidenence for the clinic diagnosis of ossificans myositis. High frequency ultrasound has a wide utilization in clinical field.

高频超声在骨化性肌炎诊断中有重要作用，可为临床提供极有价值的诊断依据，具有广阔的临床应用景。

High frequency ultrasound provide important evidenence for the clinic diagnosis of ossificans myositis. High frequency ultrasound has a wide utilization in clinical field.

高频超声在骨化性肌炎诊断中有重要作用，可为临床提供极有价值的诊断依据，具有广阔的临床应用前景。

Sustained AF could be induced easily in all dogs during vagal nerve stimulation in vivo both before and after isolation of all PVs with encircling lesions created by a bipolar radiofrequency ablation clamp device. PV elimination had no effect on atrial effective refractory period or its responses to cholinergic stimulation. Autonomic ganglia were identified by bradycardic and/or tachycardic responses to high-frequency subthreshold local stimulation. Ablation of the autonomic ganglia overlying all PV ostia suppressed the effective refractory period-abbreviating and AF-promoting effects of cervical vagal stimulation, whereas ablation of only left- or right-sided PV ostial ganglia failed to suppress AF.

无论是在双极环状消融所有PV之前或之后，在体刺激颈迷走神经节过程中持续性房颤在所有犬均能轻易被诱导出，PV切除对心房肌的有效不应期或对胆碱的反应均没有影响，通过对高频的域下刺激发生快速或慢速反应来鉴定自主神经节，消融叠加于PV口部的自主神经节能抑制有效不应期的缩短、和刺激颈迷走神经诱发的房颤促进作用，而仅消融左或右侧PV口部的自主神经节却不能抑制房颤。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。