medium-high frequency 中文意思是什麼

medium-high frequency 解釋
中高頻
  • medium : n （pl dia ）1 媒介物；傳導體；媒質，基質，介質，介體；中間物；環境、生活情形。2 手段，方法；媒介...
  • high : adj 1 高的〈指物，形容人的身高用 tall〉；高處的；高地的。2 高級的，高等的，高位的，重要的。3 高尚...
  • frequency : n. 1. 屢次，頻仍，頻繁。2. （脈搏等的）次數，出現率；頻度；【物理學】頻率，周率。
  1. High frequency of bud induction was found on ms medium supplemented with 6 - ba the optimum medium for adventitious bud induction was ms + l. 0mg / 1 naa + 0. 5mg / l 6 - ba, and ms + 1. 5mg / l naa + 0. 5mg / l iaa for bud rooting

    門）誘導毛狀根體細胞胚再生植株。通過正交實驗篩選出了毛狀根體細胞胚誘導的最佳培養基為： ms 05mg lnaa 0 sing kt 30gil蔗糖。
  2. 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。
  3. Our company dominating products cover : 1. high - frequency heating equipment ; 2. high - frequency medium heating equipment ; 3. whole - solid high and moderate frequency power ; 4. quenching machine tool and moderate frequency power

    本公司主要產品為： 1 、高頻感應加熱設備、 2 、高頻介質加熱設備、 3 、全固態高中頻電源、 4 、淬火機床及中頻電源。
  4. High frequency of shoot differentiation was obtained from the protocalli on differentiated medium. the regenerated plants still preserved resistance to methionine and ethionine

    原生質體再生的植株仍然保持對甲硫氨酸的抗性，同時對乙硫氨酸表現交叉抗性。
  5. Located in shangxi town of yiwu city, is a pvc blowing toys handbags factory with a large scale founded in 1985, it enjoys 16 - year s history, the factory covers an area of 11000 sq. m including huangshan development zone, owns 130 sets of large, medium small high - frequency heat - combining machines which form the firstclass printing production line in the same line. moreover, there are more than 200 skilled workers and a group of technicians with many years experience of production and ad - ministration served in factory. our factory has set up a good market image and established excellent brand reputation in passed years

    始建於1985年，至今已有16年的歷史。本廠佔地面積約11000平方米含黃山開發區。有大中小高頻熱合機130臺，在同行是一流印花生產線， 200多名熟練生產工人和一批具有多年生產製造管理經驗的專業人士，多年來我廠樹立了良好的市場形象，並建立了良好的品牌信譽。
  6. Abstract : igct is a kind of new ideal medium - voltage and high power semiconductor switching device. it has the advantages of high voltage, high current, low conducting loss, high switching frequency and easy sevies connection. therefore it is suitable for medium - voltage inverters with wide application prospects in the mine

    文摘: igct是一種新的理想的中壓大功率半導體開關器件，它具有高電壓、大電流、低導通損耗、高開關頻率、易於串聯優點，因此適用於中壓變頻，在煤礦具有廣泛的應用前景。
  7. The results showed that high concentration of 2, 4 - d was required for callus induction from mature seeds of tall fescue, and combination of 8mg / l 2, 4 - d with 2mg / l aba gave best induction effects. by slicing sterilized seeds longitudinally or cutting embryos, callus induction frequency was profoundly increased over intact seeds from one and half to eight times. adoption of ms basal medium and supplementation of 0. 5g / l casamino acids and 0. 5g / l glutamine in medium were found to help to facilitate callus induction

    研究表明，高羊茅成熟種子愈傷組織誘導需要較高濃度的2 ， 4 - d ，以8mg l2 ， 4 - d與2mg laba配合能獲得最佳的誘導效果；種子滅菌后縱切或切胚，可使出愈率成倍提高；採用ms基本培養基和在培養基中添加0 . 5g l的水解酪蛋白與谷氨酰胺也有助於提高出愈率；低劑量（ 10gy ）射線輻照處理對成熟種子愈傷組織尤其是胚性愈傷組織形成有一定的刺激效應。
  8. Pre - differentiation and proper partial desiccation of calli before transferred to regeneration medium was found to apparently improve the frequency and quality of plant differentiation. with our optimized culture condition and treatment style, induction frequency of pei ' ai64s and 9311 can be reached 62. 45 % and 85. 30 % respectively and after 3 months of subculture calli can remain high - quality embryogenic state, when high - quality embryogenic calli after two times of subculture were used as acceptor, callus differentiation frequency can arrive at 85. 5 % and 87. 7 % respectively

    採用我們優化后的培養條件與處理方式，培矮64s和9311愈傷組織的誘導頻率分別可達到62 . 45和85 . 30 ；繼代培養時間達三個月左右仍能保持較好的胚性生長狀態；對于繼代兩次胚性生長狀態良好的愈傷組織分化頻率分別可達到85 . 5和87 . 7 。
  9. Control of melting high strength casting iron by medium frequency induction furnace

    中頻電爐熔煉高強度鑄鐵的爐前控制
  10. Short wave is used for wireless communication which the wavelength is from 10m - 100m. in fact, the high frequency part of medium wave usually belongs to short - wave band. so many short wave communication equipments ’ band was extended to 1. 5 - 20mhz

    實際上，許多人也把中波的高頻段（ 1 . 5 - 3mhz ）歸到短波波段去，所以現有的許多短波通信設備，其波段往往擴展到1 . 5 - 20mhz 。
  11. Replacement of high power high frequency and medium frequency radio transmitters

    更換高功率高頻及中頻無線電通話器
  12. This thesis discusses maslov ' s method, wavelet transform and their applications to asymptotic evaluation of wave equations in high frequency fields. the method of solving wave equations in caustic domain by symplectic geometrical theory, and the method of simplifying two - dimension wave equations in slowly varying nonhomogeneous medium by wavelet - transform theory are proposed. the caustics phenomena of electromagnetic wave propagation in concave reflector, the singularities of caustics, and the method of computing wave fields in and far away from the caustics in concave reflector are also discussed

    本論文探討了maslov方法在波動方程高頻近似中的應用及焦散區的具體求解方法；討論了用小波變換化簡二維非均勻緩變介質條件下的波動方程；本文還討論了凹面反射的焦散現象、凹面反射焦散區的奇性種類，討論了二、三維凹面反射波動場非焦散區、焦散區的計算方法。
  13. The important parts of this work consist of : 1. the high frequency asymptotic evaluation of wave equations in nonhomogeneous medium by maslov ' s method is systematically studied, and formulations of the high frequency asymptotic evaluation in nonhomogeneous medium which varying only in one direction are constructed

    本論文的工作作為國家自然科學基金地震波傳播與成像項目（ no . 40174032 ）的一部分，得到如下結果： （一）論文分析了利用maslov方法求解非均勻介質中波動方程高頻近似解的基本原理和求解過程，構造了介質系數只在一個方向變化時波動方程高頻近似解的通用計算公式。
  14. The general statistical results of the study indicated that chinese high school students in general employed a variety of learning strategies to study english at a medium frequency level. compensation strategy, metacognitive strategy and cognitive strategy received relatively higher level of usage, while memory, affective and social strategy were reported to be used less frequently. to find out whether there is any difference in strategy use among high, middle and low proficiency students, anova was employed to analyze the variance of learning strategies among groups of different proficiency

    在比較高中低分組策略運用和高考成績之間的關系時，我們發現高考成績高分、中分和低分組的學生在使用認知、補救、元認知、社會策略時有顯著差異，英語成績高的學生在使用這些策略的頻率上顯著高於低成績組的學生，而在記憶策略和情感策略的運用頻率雖無顯著差異，但也是高分組高於低分組。
  15. Recent studies have shown that the quantum coherent population trapping, electromagnetically induced transparency, index enhancement without absorption, etc. these new effects have great potential for the control of the coherence properties of a medium, the production of high frequency lasers, the information storage and high precision measurements

    最近的研究表明，原子相干產生很多新的效應，如相干布居捕獲、無反轉激光、折射率增強、電磁誘導透明、電磁誘導吸收等。這些新效應對光學介質相干性質的控制、高頻激光的產生、光信息存儲和高度測量等方面具有巨大的應用前景。
  16. Recent studies have shown that the quantum coherence and interference have led to a lot of new effects such as coherent population trapping, electromagnetically induced transparency, index enhancement without absorption, etc. these new effects have great potential for the control of the coherence properties of a medium, the production of high frequency lasers, the information storage and high precision measurements

    最近的研究表明，原子相干產生許多新效應，如相干布居捕獲、無反轉激光、電磁誘導透明、折射率增強等。這些新效應對光學介質相干性質的控制、高頻激光的產生、光信息存儲和高度測量等方面具有巨大的應用前景。
  17. Bap performed more important function than kt in differentiation of tall fescue embryogenic calli, but better results could be achieved with combination of 2mg / l bap and 0. 5mg / l kt. at this cytokinin level, 0. 5mg / l naa was recommended to obtain the highest callus regeneration frequency. plant regeneration could be evidently boosted when embryogenic calli were pre - differentiated on high - osmoticum medium with 60g / l sucrose, and / or when the pre - differentiated compact calli were differentiated on differentiation medium solidified with l0g / l agar

    高羊茅胚性愈傷組織分化時， bap的作用要比kt大，但2mg lbap與0 . 5mg lkt配合可獲得更佳的效果；在該細胞分裂素水平下，生長素naa用0 . 5mg l ，愈傷組織再生率最高；胚性愈傷組織先在含60g l蔗糖的分化培養基上高滲預分化，以及經高滲預分化后的緻密愈傷組織在瓊脂濃度為10g l的分化培養基上分化，能明顯促進愈傷組織的植株再生；在分化培養基中添加脯氨酸導致愈傷組織再生率下降，但同時有減少白化苗再生的趨勢。
  18. However, to the essential of communication technology, those techniques are all change in transmission medium or channel. recently, because of the development of dsp, ifft / fft, 46 / 128 / 256qam using in high - speed modem, and gradual introduction of new coding technique, soft decision technique, channel self - adapting, guard interval, ofdm ( orthogonal frequency division multiplexing ) arouse more and more attention. as a technology of high - speed transmission, ofdm can resist isi effectively

    近年來，隨著dsp晶元技術的發展，傅立葉變換反變換、高速modem採用的64 128 256qam技術、柵格編碼技術、軟判決技術、通道自適應技術、插入保護時段、減少均衡計算量等成熟技術的逐步引入，正交頻分復用ofdm （ orthogonalfrequencydivisionmultiplexing ）作為一種可以有效對抗信號波形間干擾的高速傳輸技術，引起了廣泛關注。
  19. The gauss - ray tracing have the dynamic and geometric character. it can compose the record by calculating the high frequency wave in transverse anisotropic medium, avoiding getting the accurate ray path. it is a very steady and effective method with little calculation time and a good precision

    高斯射線束正演包括地震波運動學特徵和動力學特徵，能有效的計算橫向上不均勻介質中高頻體波的合成紀錄，避開了精確求取兩點射線路徑，大大減少了計算的時間，同時又具有較高的精度，是一個很穩健有效的方法。
  20. In this paper, the starting issue for thyristor - based high - power medium - frequency series - parallel resonant current source inverters, with particular reference to induction heating applications, is studied and discussed in - depth

    在廣泛閱讀國內外大量文獻和深入研究感應加熱逆變電源的現狀和發展趨勢的基礎上，本文對大功率串並聯逆變晶閘管中頻電源的啟動問題進行了深入的研究與探討。
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