查询词典 hf

Some research was dealed with in multirate signal process and digitizes the channel from IF, 455 KHz, to base band in HF system.

本文以HSP50415和AD6620为核心，以TI公司的TMS320VC5509和TMS320VC33作为控制单元，设计了一种通用中频数字化处理平台并完成了调试，在该平台上实现了单音信号(如1.2KHz)到455KHz的中频，再由455KHz中频到基带的过程。

The equilibrium geometries of squaraines substituted by heteropentacyclic, benzo fuzed heteropentacyclic, heterohexacyclic, benzo fuzed heterohexacyclic, heptacyclic, benzo fuzed heteroheptacyclic and zwitterionic squaraines were obtained with ab initio calculation at HF/6-31G* level and the electronic spectra were examined using CIS/6-31G* method.

用从头算6-31G~*方法优化了多种五元杂环、苯并五元杂环、六元杂环、苯并六元杂环、七元环和苯并七元杂环取代的方酸分子以及方酸两性离子分子的几何结构；用CIS／6-31G~*方法计算了其电子光谱；通过TDHF／6-31G~*方法计算其线性极化率、一阶和二阶超极化率来研究分子结构和非线性光学性质之间的关系，同时用两态模型解释了部分分子的一阶超极化率。

Inocula containing an average of 1 PFU per well infected 90% of cells with HF monolayers.

结果建立了高灵敏度的检测病毒颗粒的方法。

For example, MI behaved most sensitive to heart state when spontaneous respiration inhibited with respiration machine; FD could manifest heart healthy level, which reduced sharply sooner after acute injury but remained almost steady afterwards; the parameters of Poincare dissert-dot plot and HRV could accurately distinguish the state change before and after ligaturing; the HF-ECG excelled in not only revealing injury degree but also locating injury position.

例如，交互信息对自主呼吸被接呼吸机抑制后的状态敏感，分维具有表征心脏健康状况潜力的特性，在急性损伤后明显减少，但不随损伤的时间延续而变化；心率变异性参数和散点图可以灵敏地区分出急性损伤前和损伤后的状态；而高频心电在表征心脏损伤和定位方面独具特色。

The sample was liquated with a mixed flux of unhydrous sodium carbonat and bonic acid,soaked out with hydrochloric acid(1+5),and then the sample solution was measured by inductively coupled plasma atomic emission in system of nebulizer and torch resistant to hydrofluoric acid.

试料经无水碳酸钠和硼酸的混合熔剂熔融，HCl(1+5)浸取，在电感耦合等离子体原子发射光谱仪上，用耐HF腐蚀的雾化器和矩管系统测量。

In frequency domain analysis, HF refects the tension variation of vagus; LF reflects the tension variation of sympathetic nerve.

频阈分析是近年来受到重视的分析方法之一，即对心率变异的速度和幅度进行心率功率谱的分析，亦称心率能谱分析。

They were randomly scarified at 3, 6 and 9 weeks after injection of CCl4 respectively. Their liver tissues were analyzed for histopathological changes. Gene expression of p38MAPK was measured by reverse transcription-PCR and immunohistochemistry was used to detect the protein expression and localization.

取其肝脏观察HF形成过程中不同时间段各组大鼠肝组织病理变化，用RT-PCR技术检测p38MAPK mRNA在造模过程中肝组织中的表达变化，免疫组化方法检测p38MAPK在造模过程中肝组织中蛋白表达量的变化，及其在肝组织中的表达分布情况。

Tarting with Milwaukee, SHF is working towards establishing centers nationwide that combine Music and Arts in a technologically advanced, mainstream and culturally relevant manner.

HF是起始于密尔沃基的一家慈善机构，该机构希望以技术进步为依托，主流音乐为手段，文化影响为策略建立起全国性的容音乐和其他艺术形式于一体的活动中心。

These drivers are biamped with a 250-watt LF amplifier and a 120-watt HF amplifier, which provides, according to JBL, a-flat +1 dB/-1.5 dB response from 50 Hz to 20 kHz, with a low frequency extension all the way down to 36 Hz.

这些驱动程序biamped与250瓦低频放大器和1 120高频放大器，提供瓦，据JBL，一坪从50赫兹1 dB/-1.5分贝至20千赫的反应，具有低频扩展名的所有一路至36赫兹。

In accordance with the recommendations of WARC-MOB 87, IMO is developing a GMDSS Master Plan of coast station and coast earth station provided by Governments and coordinating schedules of broadcasts of MSI to avoid mutual interference in the NAVTEX, INMARSAT Safety NET and HF MSI systems.

根据 WARC-MOB 87的建议，国际海事组织正在建设一个由政府提供的海岸电台和海岸地球站的GMDSS总图和海上安全信息广播协调时间表，以避免NAVTEX、INMARSAT安全网业务和高频海上安全信息系统的相互干扰。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。