line spectrum 中文意思是什麼
line spectrum
解釋
線光譜；線譜-
Application study on low - voltage power line carrier wave spread spectrum communication system
低壓電力線載波擴頻通信系統的應用研究 -
This instrument can meter the electric level, frequency spectrum, carry to noise ratio, a / v, cobbly ratio, voltages of the ac trunk line and the battery. furthermore it can display the above information on the lcd and store them in the eprom
該場強儀可以對有線電視系統的電平、頻譜、載噪比、 a v比、系統不平度、交流干線和電池電壓等進行測量，並通過液晶顯示，結果保存於eprom中。 -
Technique of transmitting data via power line （ pl ） ， a new technique developed in recent years ， is used to automatize the free collecting system in public service and the management of uptown service 。 this article discussed the advantage ， disadvantage and the current state of the power line carrier communication 。 the advantage ， method and current state of using spread spectrum technique in power line communication are discussed 。 then the characteristic of low voltage power network was also compendious analyzed 。 in this paper ， after introducing the principle of ssc ， design of hardware and software of the system are been discussed 。 this system has been put into use ， the result has proved its high stability and reliability
本文研究旨在提供一種利用低壓電力供電網路、低成本、高可靠地實現公共事業收費自動化和小區物業管理智能化的技術應用。討論了電力線載波通信的優、缺點及現狀，擴頻技術在電力線載波通信應用的優點、方式和現狀，並對低壓電力線網路的特性進行了簡單的分析。在闡述了擴頻通信的基本原理的基礎上，本文詳細地介紹了電力載波遠程抄表系統的具體實現，包括硬體模塊和管理軟體本系統已投入運行，具有較高的穩定性和可靠性。 -
Motion of a star across the line of sight causes no change in its spectrum.
恆星橫越視線方向的運動，在它的光譜中不會引起什麼變化。 -
By using matsubara green function theory, we have studied the magonon spectrum and calculated the magnon dispersion curve on the line in the brillouin zone for different parameters in the system
利用格林函數方法研究了磁振子聲子相互作用下的二維絕緣鐵磁體的磁振子譜，計算了布里淵區的線上的磁振子色散曲線。 -
On - line measurement and frequency spectrum analysis
在線測量頻譜分析 -
A particular spectrum line corresponds to a certain definite light wavelength.
某特定的譜線就代表一個確定光的波長。 -
Hence, the spectrum is called a line spectrum ; it is also called an atomic emission spectrum, since it is produced by emission of light from excited atoms
因此，這個光譜也被稱為線光譜，也被稱為原子發射光譜，因為它是由被激活的原子發出的光產生的。 -
Research on technique of passive sonar target recognition based on line spectrum feature extraction
基於線譜特徵提取的被動聲納目標識技術研究 -
Research on technique of passive sonar target recognition based modulation line spectrum feature extraction
基於調制線譜特徵提取的被動聲吶目標識別技術研究 -
A conception of phase dynamic coupling is defined. the foc of the mot - radiated line spectrum signals is theoretically derived
在研究中，定義了相位動態耦合的概念，推導了水下運動目標輻射線譜信號的四階累積量表徵公式。 -
Of the gas. since different gas has different set of lines, we can tell which kind of gas it is by analyzing the line spectrum
不同的氣體會產生不同的線條，就如人類的指紋，只要分析光譜上的吸收線，便可以知道光波曾經通過的氣體成分。 -
The results show that the self - adaptive filter can be used to detect line spectrum, the wavelet transform and the fourier transform can be used to detect the ship noise in modulating the anisotropic noise field
結果表明：自適應濾波對于各向異性噪聲場中的線譜檢測有良好的效果；而小波變換和短時傅里葉變換對各向異性噪聲場中的艦船噪聲調制信號檢測有良好的效果。 -
The main research contents of the physical design include : presenting the domestic and international status of space weather and expanding on the need and the importance about the space weather forecast ; sorting the disastrous space weather and discussing their effects and adapted prediction methods ; analyzing the solar disturbing resources of space weather and the precursor or concomitant phenomena of solar eruption based on the newest observational results ; probing into the radiation principle of solar short - wave ray and presenting the computing methods about solar continuum and line spectrum radiation ; extrapolating physical methods of reconstructing the temperature and the emission measure of coronal plasma ; argumenting the effective observing spectrum for space weather empirical forecast and space weather numerical forecast
物理設計的主要研究內容包括：分析目前國內國際空間天氣預報的發展現狀及開展空間天氣預報的必要性和重要性；分類討論了災害性空間天氣的種類、影響及目前國際上的預報方法：分析了空間天氣太陽擾動源及擾動源爆發的先兆現象或者伴生現象；討論了太陽短波輻射線譜和連續譜輻射強度的計算方法：推導了利用望遠鏡多波段的觀測結果反演日冕等離子體溫度、發射量等參數的物理方法：論證了開展空間天氣經驗預報和發展數值預報有效的成像譜段。 -
Experiments show that, when use msp430f149 audio sensor to identify vehicles that contain plane, tank, truck and so on by time domain features and two - level f - ratio, the recognition rate is 82. 1 % ; when use both msp430f149 audio sensor and arm9 sensor to identify vehicles, and the recognition rate is much better than the original system and msp430f149 audio sensor. line spectrum of power spectra and 3 / 2 spectrum is used as frequency features on arm9 sensor, and it is caught by narrow - band bandpass filter
實驗證明，在主頻為8mhz的msp430f149感知器上，採用基於時域特徵和二階f比的識別演算法，能夠實時地完成對飛機、坦克、卡車等交通工具的識別;將msp430f149感知器與基於arm9的高端感知器配合使用，且高端感知器採用功率譜線譜或3 / 2維譜線譜作為頻域識別特徵，能夠實時的對各類交通工具做更高性能的識別。 -
A new method of line - spectrum extraction of ship radiated - noise based on part imitate was proposed in this paper
摘要提出了一種基於分段擬合的提取艦船噪聲信號功率譜中線譜特徵的方法。 -
A new method to extract line - spectrum series based on energy criterion and sub - band synthesis is presented in this paper, and verification is further investigated with simulated and measured data
本文提出了一種基於能量判據和子頻帶綜合的線譜序列提取方法，並利用實測數據進行了比較分析。 -
Application of optimized line - spectrum feature to underwater target recognition
優化的線譜特徵在水下目標識別中的應用 -
The method using the part imitate extract the continuous spectrum of the signal spectrum, than extract line - spectrum from the relatively flat line - spectrum by subtract it from the former spectrum
該方法利用分段擬合方法擬合出信號功率譜的連續部分，從原始功率譜中減去連續譜得到拉平的線譜分佈，然後進行線譜特徵提取。 -
The distribution of line - spectrum and its harmonics extracted from the spectral envelope of different target ' s radiated noise exhibits strong differences, which may provide important clue for the detection and classification of targets
摘要不同類型目標輻射噪聲包絡譜中的線譜及其諧波分佈存在較大差異，是進行目標檢測和分類識別的重要線索。
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