規定頻帶 的英文怎麼說
中文拼音 [guīdìngbīndài]
規定頻帶
英文
allocated frequency band-
In designing the complex weights for center frequencies of each sub - band, an optimizing method using semi - definite programming " is proposed
在設計各子帶中心頻率上的恆定束寬加權時，提出了一種半定規劃的優化方法。According to the guidline, two nd : yag lasers have been designed and set up, one is end - pumped by lower output power ld using a selfoc micro lens, and the other is end - pumped by high output power ld using a pair of lenses are designed, and the characteristics such as output power and power stabilization of both solid - state lasers are investigated. thirdly, when an empty liquid crystal cell is inserted in the cavity of the nd : yag laser pumped by high power ld, the laser can operates in single axial mode. finally, according to the relationship between the laser output power and the longnitudinal a ld - end - pumped nd : yag laser sensor for displacement measurement has been investigated theoretically and demonstrated experimently, the results indicate that when the mean radius of pumping inside the laser cavity is far less than that of the oscilating laser mode, the exponential of the output power is a gauss function of the longitudinal positon of focused spot of ld pumping beam, both the measurement range and the sensitivity are dependent on the incident pumping power, as the incident pumping power is increased, the measurement range is enlarged and the sensitivity is improve d
本文首先介紹了ld泵浦nd ： yag激光器的發展狀況、主要特性及其應用，從四能級速率方程出發，推導了ld泵浦nd ： yag激光器的閾值、輸出功率和斜效率的表達式，並簡述了激光器的工作原理、結構型式和倍頻方法；其次，以空間相關的速率方程為基礎，提出了ld端面泵浦nd ： yag激光器的設計方法，給出了一定泵浦耦合方式下，振蕩光模尺寸、最佳輸出耦合率、泵浦光模尺寸、泵浦光焦斑位置等參數的選取依據，以此為依據，設計了自聚焦透鏡耦合小功率ld泵浦nd ： yag激光器和透鏡組耦合高功率ld泵浦nd ： yag激光器，對激光器的輸出功率和功率穩定性等特性進行了實驗研究；再次，在帶尾纖輸出的高功率ld泵浦nd ： yag激光腔內插入一隻空液晶盒，觀察到了激光器以單縱模運轉；最後，根據泵浦光焦斑端面位置對激光輸出功率的影響規律，提出了ld端面泵浦nd ： yag激光位移傳感新方法，並進行了理論和實驗研究，研究結果表明：當激光晶體內泵浦光平均光斑半徑遠小於振西安理工大學碩士學位論文蕩光束腰半徑時，激光輸出功率的自然指數與泵浦光焦斑的縱向位置成高斯變化規律，測量范圍和靈敏度依賴于泵浦功率，隨著泵浦功率的增加，測量范圍擴大，靈敏度提高，當端面泵浦功率為7 . 24w （最大輸出功率為1 . 926w ）時，激光位移傳感器的測量范圍和靈敏度分別是13 . 045mm和0 . 148mw / pm 。According to ctbto, ims array comprises 9 vertical short peroid ( sp ) seismometers and a broad - band seismometer
Ctbto規定ims臺陣應配置9臺短周期垂直向地震儀加一臺寬頻帶地震儀。Verification regulation of wide band frequency stability measurement set in time domain
寬頻帶頻率穩定度時域測量裝置檢定規程Rectangular connectors for frequencies below 3 mhz ; part 2 : detail specification for a range of connectors, with assessed quality, with trapezoidal shaped metal shells and round contacts ; fixed solder contact types
頻率低於3mhz的矩形連接器.第2部分:帶質量評定的帶梯形金屬套和圓形接觸件的連接器系列的詳細規范.固定的的釬焊接型Rectangular connectors for frequencies below 3 mhz - part 2 : detail specification for a range of connectors, with assessed quality, with trapezoidal shaped metal shells and round contacts - fixed solder contact types ; amendment 1
頻率低於3mhz的矩形連接器.第2部分:帶質量評定的帶梯形金屬套和圓形接觸件的連接器系列的詳細規范.固定的釬焊接型.補充件1Harmonized system of quality assessment for electronic components - sectional specification : fixed inductors with ceramic or ferrite core wound with copper wire for rf circuits
電子元器件質量評定協調體系.分規范.射頻電路用帶陶瓷或鐵心的銅導線線繞固定電感器Dividing the evaluation of network - nle system into four subjects : video quality unit, network bandwidth unit, software function unit and system stability unit. thus, the evaluating and testing method has been developed based on further standardization and specification
嘗試將非編網路測試分為視頻質量單元、網路帶寬單元、軟體功能單元、系統穩定性單元等四個項目，並進行了規范化和細化，提出了改進的測試評估方法。Connectors with assessed quality, for use in d. c., low - frequency analogue and in digital high speed data applications - printed board connectors - detail specification for two - part connectors with shielding and a basic grid of 2, 5 mm - cable to board connectors, shielded against emc, grid 2, 5 mm, for high speed data rates, for use with printed boards
經過質量評定的直流低頻模擬及數字高速數據系統用連接器.印製電路板連接器.帶屏蔽和2 . 5mm基柵的兩件式連接器詳細規范.同印製板一起使用的高速數據傳輸率emc屏蔽防護和2 . 5mm柵格的電路板連接器電纜Specification for modems for connection to public switched telephone networks and speech band private circuits run by certain public telecommunications operators
由某些特定公共電信話務員經管的與公共轉換電話網路和語言頻帶私人電路連接的數據機規范Realnetworks has formulated a specification for audio and video compression, known as realmedia. it is a multimedia application standard for the cross - platform clientserver structure, which prevails over the internet. it uses audiovideo streams and synchronous playback technologies to provide the best quality multimedia on a full broadband basis, and stereophony and continuous video at the transmission rate of 28. 8 kbps over the internet
Realnetworks公司所制定的音頻視頻壓縮規范稱為realmedia ，是目前在internet上相當流行的跨平臺的、客戶服務器結構的多媒體應用標準，它採用音頻視頻流和同步回放技術來實現在intranet上全帶寬地提供最優質的多媒體，同時也能夠在internet上以28Connectors for use in d. c., low - frequency analogue and digital high - speed data applications - rectangular connectors with assessed quality - detail specification for a range of shielded connectors with trapezoidal - shaped shells and non - removable ribbon contacts on a 1, 27 mm double row
直流低頻模擬及數字高速數據應用系統用連接器.有質量評定的矩形連接器.帶有1 . 27mm雙排不可拆卸矩形接觸件及梯形外殼的屏蔽系列連接器詳細規范Connectors for use in d. c., low frequency analogue and digital high speed data applications - part 3 - 100 : rectangular connectors with assessed quality - detail specification for a range of shielded connectors with trapezoidal - shaped shells and non - removable ribbon contacts on a 1, 27 mm double row
直流低頻模擬及高速數據數字系統用的已經過質量評定的連接器.第3 - 100部分:矩形連接器.帶有1 . 27mm雙低不可拆卸矩形觸點及梯形外殼的屏蔽連接器作用范圍的詳細規范Connectors for use in d. c., low frequencey analogue and digital high speed data applications - part 3 - 100 : rectangular connectors with assessed quality - detail specification for a range of shielded connectors with trapezoidal - shaped shells and non - removable ribbon contacts on a 1, 27 mm double row
直流低頻模擬設備和數字高速數據應用設備用連接器.第3 - 100部分:經質量評估的矩形連接器.連接在1 . 27 mm雙列帶上的帶不等邊四邊形外殼和固定帶狀觸點屏蔽連接器范圍的詳細規范Connectors with assessed quality for use in d. c., low - frequency analogue and in digital high speed data applications. part 4 : printed board connectors. section 102 : detail specification for two - part single - pole connectors, for multiple uses on plug - in units, with pre - centring, coding and early mating features, having a metric grid in accordance with iec 60917
經質量評估的直流低頻模擬和數字高速數據設備用連接器.第4部分:印刷電路板連接器.第102節:帶前定心編碼和預配合部件的符合iec 60917的公制柵格多用途插件用雙部分單極連接器的祥細規范Connectors with assessed quality, for use in d. c., low - frequency analogue and in digital high speed data applications - printed board connectors - detail specification for two - part single - pole connectors, for multiple uses on plug - in units, with pre - centring, coding and early mating features, having a metric grid in accordance with iec 60917
直流低頻率模擬及高速數字數據系統用已經過過質量評定的連接器.第4部分:印製電路板聯接器.第102節:帶前定心編碼和預配合部件的米制多用途插件用雙部分單極聯接器的詳細規范Connectors with assessed quality for use in d. c., low - frequency analogue and in digital high speed data applications - part 4 : printed board connectors - section 102 : detail specification for two - part single - pole connectors, for multiple uses on plug - in units, with pre - centring, coding and early mating features, having a metric grid in accordance with iec 60917
直流低頻率模擬及高速數據數字系統用已進行過質量評定的連接器.第4部分:印製電路板聯接器.第102節:帶前定心，編碼和預配合部件的米制多用途插件用雙部分單極聯接器的祥細規格Connectors with assessed quality, for use in d. c. low - frequency analogue and in digital high - speed data applications. part 3 : rectangular connectors. section 101 : detail specification for a range of shielded connectors with trapezoidal shaped shells and non - removable rectangular contacts on a 1, 27 mm x 2, 54 mm centre - line
經質量評估的直流低頻模擬和數字高速數據設備用連接器.第3部分:矩形連接器.第101節:連接在1 . 27 mm x 2 . 54 mm中心線上的帶不等邊四邊形外殼或固定矩形觸點屏蔽連接器范圍的詳細規范This is the first occasion that w - ofdm - based fixed wireless access system is put to large - scale commercial use in china
這是基於w ofdm （寬帶正交頻分多路復用）技術的固定無線接入系統在中國首次大規模的商業應用。分享友人