hf 中文意思是什麼

hf 解釋
Hf ＝ 【化學】 hafnium.
  1. The ionosphere is a complex medium, which is aeolotropy, asymmetry, dispersive and changes randomly with time. in order to improve the communication quality of the shortwave that depends on the ionosphere, we should have aknowledge of the current condition of the ionosphere in real time. the backscatter sounding of high frequency can diagnose the real - time channel characters for shortwave communication or hf radar, which is great assistant to shortwave communication and hf radar

    電離層是隨機時變，各向異性，非均勻、色散的復雜介質。為了保證依賴于電離層進行的短波通信質量，必須了解電離層的實時狀態信息。高頻返回散射探測可以實時監測與短波通信或高頻天波雷達相關的天波傳播通道的狀態，對短波通信和天波雷達工作起了重要的輔助作用。
  2. Reactions in liquid hf are known that illustrate also amphoteric behavior, solvolysis, or complex formation.

    已知在液態HF中，也能說明兩性行為溶劑分解或絡合物形成作用的反應。
  3. Chemical company, inc. : specialty chemical manufacturer in kentucky, whose main products focus on food contact disinfection, and include chloramine, trichloromelamine, hf - pyridine, and specialty iodides

    衢州中園化工有限公司是生產氯化鈣系列產品，電石系列、乙炔氣、醫藥中間體（二溴丁二酸）的企業。
  4. S chemical company, inc. : specialty chemical manufacturer in kentucky, whose main products focus on food contact disinfection, and include chloramine, trichloromelamine, hf - pyridine, and specialty iodides

    衢州中園化工有限公司是生產氯化鈣系列產品，電石系列、乙炔氣、醫藥中間體（二溴丁二酸）的企業。
  5. Verification regulation of cj - 2 type hf dielectrometer

    Cj - 2型高頻介質損耗測量儀檢定規程
  6. Major products and services of the company cover satellite communication equipment, mobile communication products, hf communication system, ctv sets, personal digital entertainment products, electronics manufacturing, instruments and meters, production equipment, software services and system integration

    公司主要產品和服務包括：衛星通信設備移動通信設備短波通信設備彩電個人數碼娛樂產品電子製造儀器儀表大生產裝備軟體服務系統集成等。
  7. The vlf / hf by using ar presents trend of increasing, this is tallied with clinic. analyzing 5 minute hrv ( decubitus ) for 4 myocardial ifchemia sickness by using ar and fft

    現代譜估計所得的vlf / hf比值隨年齡（ 20歲）增加基本呈現增加的趨勢，與臨床認識吻合。
  8. In addition, the hf in the downcomer of ctst plate is 110 ~ 150mm lower than that of fl valve plate. it was showed that making a comparison of two plates, the downcomer of ctst tray can cope with more operation loads with the same size downcomers

    這說明相同大小的降液管， ctst塔板上的降液管可處理的操作負荷比浮閥塔板的要大；即若在相同的操作負荷下，在設計降液管時， ctst塔板的降液管尺寸可比浮閥塔板的小。
  9. Hf - current in monopolar electrosurgery flows from an active electrode ( i. e. the instrument ) through the patient ' s body to a neutral electrode, patient plate, applied o his / her body

    在單極高頻外科手術中，高頻電流從活動電極（例如儀器本身）流經病人身體到達中性電極（附著在病人身體的病人板）
  10. Fluoride treatment included both excised leaves cultured in nutrient solutions and leaves from plants fumigated with hf.

    氟化物處理既包括培養在營養溶液中的切離葉片和HF熏氣的植株上來的葉片。
  11. The photoemission spectra of si 2p, hf 4f core levels, a

    22ev的fermi能級變化也被觀察到了。
  12. Since hf forms only a two-dimensional polymer it is less viscous than water.

    由於HF只形成二維聚合體，所以它的粘性比水的小。
  13. Hf hanguan processing, steel wholesale and retail

    高頻焊管加工，鋼材批發兼零售。
  14. Research on access token management for hf channel

    短波通道接入令牌管理策略的研究
  15. China nonferrous metals industry association ti - zr - hf branch

    中國鈦鋯鉿協會
  16. Hf acid detecting paint to ensure valve integrity

    用於保證閥門完整性的氫氟酸檢測漆。
  17. Finally the structures were released in a 49 % hf etch

    最後在49 hf中腐蝕形成這些結構。
  18. Determination of isothermal sections of the ni - ta - hf ternary system

    三元系等溫截面的研究
  19. The frequency shift keying modulation is widely used in hf digital communication

    移頻鍵控是短波數字通信中常用的一種調制方式。
  20. Establishment of real - time vessel tracking system for all large vessels - using automatic identification system ( ais ) coupled with inmarsat - c / or hf capability on vessels ( or other technology as appropriate such as meteor burst signal technology ) - and continuous tracking of all such vessels by us coast guard

    利用跟蹤系統對所有大型船隻進行跟蹤，美國海岸警衛隊使用自動鑒別系統及其他相應的技術對所有的船隻進行跟蹤。
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