The phase-shifted controlled voltage mode converters with HFL are deeply investigated.

But the voltage mode HFL inverters often have performance and application in high power application.

但是在大功率场合，一般采用的还是电压源高频交流环节。

Objective To evaluate the diagnostic role of high frequency ultrasonography ( HFU) and CDFI for breast carcinoma of the old female.

目的：探讨老年乳腺癌的高频超声图像和彩色多普勒表现。

Results: Most of the small breast cancers appeared as median type on HFU while few ones looked like typical malignant characteristics.

结果：小乳腺癌的二维声像图特点大多属于中间型，少数表现为典型恶性特征；

Methods: HFU and CDFI finding were compared with pathology study in 80 cases with breast hyperplasia.

方法：对80例乳腺增生症患者的高频声像图及彩色血流表现作详细观察记录，与病理学组织类型进行对比研究。

Objective To investigate the applicability and clinical value of high frequency ultrasound ( HFU) in the abdominal check.

目的探讨高频超声在腹部检查中的适用性和临床价值。

Methods HFU and CDFI findings were compared in 42 cases with confirmed breast masses.

方法42个乳腺肿块经手术及病理证实，对术前高频声像图特征与CDFI表现进行分析与比较。

20-MHz HFU could show diffuse or nodular foci on skin and prominently increase the diagnostic accuracy of these lesions.

20MHz超高频超声可显示皮肤弥漫性或结节性病灶，明显提高病变诊断的准确性。

Methods images of HFU and CD of54 cases of such patient who underwent operation were analyzed retrospectively.

方法对54例经手术证实的视网膜脱离的高频超声和彩色多普勒血流成像进行回顾性分析。

A meshing engagement theory for Hypoid and its application in HFT

准双曲面齿轮啮合原理及其在刀倾半展成加工中的应用

The results are as follows: Exogenous hormones enhance HFT gene expression.

结果表明外源激素促进了该基因的表达。

They should know who is using HFT and to what standards they are held.

他们理应知道是谁在使用高频交易，以及有何标准。

HFT may not carry risks to the financial system but no one knows for sure.

高频交易或许不会给金融体系带来风险，但对此没人敢打保票。

Objective To clone and analyze the whole sequence of L1 gene and its deduced L1 protein of HFV 11, for the purpose of detection and prophylactic and therapeutic vaccine against papillomavirus infections.

目的克隆和分析HPV11的晚期表达基因序列L1及其编码的氨基酸序列，为HPV感染的检测和基因工程疫苗研制提供基础。

It was concluded that HFV inspiring oxygen could more effectively and quickly improve the patients'hypoxia, which can be adopted as a normal therapy for acute intracerebral injury.

HFV比常规吸氧能更有效、更迅速地改善病人缺氧状况，可作为脑外伤常规氧疗方法。

Human foamy virus ( HFV), the first identified human retrovirus, was isolated in 1971 from a patient with a nasopharyngeal carcinoma.

人泡沫病毒（human foamy virus，HFV）于1971年被分离发现，是最早发现的人逆转录病毒。

The above results suggested that E-HFV could be spreaded among animals by aerosol and EHFV could exist in an aerosol form.

结果表明EHFV在动物间可经气溶胶传播。

This type of gene repression mediated by miR-491 may offer a good advantage for HFV to establish viral latency.

miR-491介导的这种抑制作用有可能会为病毒建立潜伏感染提供有利条件。

Construction of HFV Vector-Mediated GAD Gene and Its Application

介导GAD基因的人泡沫病毒载体的构建及其应用

The assay of specific CTL function of recombinant adenovirus expressing HFV S gene fragment

表达新疆出血热病毒S基因片段的重组腺病毒特异性CTL功能测定

Temperatures Automatic Control System of HFW Welded Pipe Seam

高频焊管焊缝的温度自动控制系统