質量衰減 的英文怎麼說

中文拼音 [zhíliángshuāijiǎn]
質量衰減 英文
mass attenuation
  • 質 : Ⅰ名詞1 （性質; 本質） nature; character; essence 2 （質量） quality 3 （物質） matter; substance;...
  • 量 : 量動1. （度量） measure 2. （估量） estimate; size up
  • 衰 : 衰動詞（衰弱） decline; wane
  • 質量 : 1 [物理學] mass 2 （產品或工作的優劣程度） quality 3 economy （離子源的）; 質量標準 quality level...
  • 衰減 : attenuation; decay; damping; reduction; rejection; weakening; deamplification; dampening; dying o...
  1. There has been many papers to discuss the in - medium quark and gluon condensates in nuclear matter which use the models with su ( 2 ) l su ( 2 ) r sym - metry. now, we make use of the chiral model su ( 3 ) l su ( 3 ) n including the baryon octet to discuss the quark condensate < qq > in strange matter, where q is an up or down quark field. on the one hand, from the experimetal data, it is found that < qq > vac = - ( 225 25mev ) 3, on the other hand, with the hellmann - feynman theorem, quark condensate can be evaluated on the hadronic level. in this paper, we will investigate the quark condensate in strange matter with the chiral symmetry su ( 3 ) l x su ( 3 ) rspontaneous breaking lagrangian to obtain the variation of the quark condensate in the strange matter when the baryon number change. it can be applied to understand the neutron stars when the neutron star are considered to be constructed by the strange matter. because nertron stars are homogeneous and at very low temperature, we will use the mean - field approximation and zero temperature throughout this paper

    鑒于已有大量文獻討論了核物質中的夸克凝聚，本文將討論在奇異物質中的夸克凝聚。而在介質中的夸克凝聚的基本公式可由hellmann - feynman理論導出，所以運用手征對稱自發破缺拉氏量以及平均場近似，我們就可以討論在奇異物質中的夸克凝聚，由所計算的結果表明： （ 1 ）奇異物質中的夸克凝聚隨奇異物質密度的增大而單調減小。 （ 2 ） -凝聚的出現對衰減率有影響。
  2. The investigation of a lot of parameters about treated sandstone, brick materials and earthen materials with fluorited polymers has been carried out, such as the formation of polymer, the penetration depth, porosity, capillary absorption and penetration coefficient, water uptake, compressive strength, drilling resistance, absorption isotherms of water vapor, water vapor diffusion, color changes as well as resistance to desegregation of water, frizzing - throwing cycles, worming - cooling cycles, and so on. in addition, the influence of salt crystallization, acid and base, and uv aging have also been assessed in order to better understand the protection effects and utilization possibility of two fluorinated polymers, mainly according to astm standard and the combination of international methods together with general technological

    分別以國家級文物保護單位的土質、砂巖和磚材文物樣品為對象，依據astm標準及國際通用文物保護研究方法與評估準則相結合，通過膠化物形成周期、滲透深度、孔隙度、毛細吸水和滲透系數、持水量、抗壓強度、抗鉆強度、吸附水蒸氣的能力、透氣性、外觀顏色等系列參數的測定，及凍融、冷熱循環、酸堿腐蝕后抗壓強度的衰減、可溶鹽對保護效果的影響、酸堿及光照對表面保護效果的影響，對兩種含氟聚合物及其與有機硅的共混物在文物加固保護和表面防護中的可行性和保護效果給予了系統研究。
  3. The decay of the external scalar - field of a black hole is studied in the third chapter, i. e., the physical mechanism of the decay of neutral scalar - field in the gravitational collapse, and the physical mechanism of the decay of charged massive scalar - field in the gravitational collapse

    第三章主要研究無質量標量場在黑洞外部的衰減，即無質量中性場在引力塌縮中隨時間衰減的物理機制和無質量荷電標量場衰減的物理機制。
  4. Delay line oscillator is composed of broadband amprifer adjustable attenuator and saw sensor device. after output signal of delay line oscillator is smoothed, it mixes with 109mhz local oscillation signal. its differential frequency signal is smoothed by low - pass filter trimmed by shaping circuit and processed by digital processing circuit

    延遲線振蕩器由寬帶放大器、可調衰減器和聲表面波質量傳感器件構成。延遲線振蕩器輸出信號經濾波后與109mhz的本機晶體振蕩器輸出信號相混頻，通過低通濾波取其差頻，並經整形後由數字信號處理電路處理。
  5. A new method for measuring the vibration of shadow mask without touch by detecting the light density with reflection type optical fiber sensor is presented. the measurement system based on the new method is designed to make the vibration measurement easier working, faster calculating, and get more precise results. it is an important measurement and analysis tool to improve the performance of shadow mask and display quality of cpt

    本文提出了基於單光纖光強度反射法的非接觸式微振動測量系統的原理，並設計製造了該測試系統，探索出了簡單方便可靠的測量方法，能夠準確客觀地反映蔭罩振動的各項參數（各振動模的振動頻率、振幅、衰減時間） ，實現了測試裝置的簡便化和測試過程的自動化，為cpt張緊式蔭罩系統的性能改進與顯示質量的提高提供了有效的測試分析手段。
  6. The results show that : nano - nickel powder is not useful for mh electrode during the high rate discharge phase as a conductor or additive ; superfine nickel powder is applicable for the conductor of the negative because of the good performance especially the cyclic stability at 1c rate by using 5 % ( mass percentage ) nickel powder ; the utilization of alloy, specific mass and volume capacity are increased with the decreased particle size of nickel powder in negative, however, the capacity fading rate at 1c discharge rate is also increased, so the capacity and the cyclic stability should be taken into account to make a choice of the particle size

    結果表明： mh電極中加入納米鎳粉對負極的大電流放電性能不利。 mh電極中加入超細鎳粉后電極綜合性能好，尤其是1c循環穩定性，其最佳添加量為5wt 。減小鎳粉粒度提高了電極合金利用率、質量比容量、體積比容量，但增大了負極1c容量衰減率，因此鎳粉粒度的選擇應綜合考慮mh電極容量和循環穩定性。
  7. And the impact of processing conditions on the electrochemical performance of the porous sn - cu alloys was investigated. results showed that it was good to add more verdigris and to make the annealing time longer for improving the performance. however, the problem of capacity fading can not be solved completely by this method

    並對制備合金材料過程中所添加物質的種類和比例、燒結時間等工藝參數對合金的性能的影響進行了分析，發現添加堿式碳酸銅，並且增大添加比例以及延長燒結時間對電極材料的循環壽命有利，但是不能根本解決容量衰減的問題。
  8. 3 in renal failure stage, it can decrease hemolialysis times obviously. if you persist in treatment, it can enhance renal function restoration ability gradually and make you need no more dialysis therapy, prolong life, improve quality of life and make you reach recovery completely

    腎衰期，可明顯減少血透析次數，只要堅持治療，逐漸提高腎功能恢復力，乃至毋需透析治療，延長生命，提高生命質量，最終可達到完全康復之效果。
  9. In the mean time, i test the separator ’ s performance, including the rate of hole 、 the performance of absorbing electrolyte and the conductance eletrochemical steady range 、 machine intensity test, and then make bettery to test its cycle performance. the test result show that, the spreading separator get better performance, when dbp ’ s percentum reach 50 %, and dry temperature reach 90, after ultraviolet radiation disposal. the test show that, the separator has high conductance reach 6. 1 10 - 3s / cm ( 25 ), and the machine intensity can reach 3. 92 mpa, this separator can meet the need of making bettery, the bettery capability will go down after 30 cycle. and the bettery show worse performance under high temperature, under 70, the bettery will get fire. making the intensified seprator, i find that when dbp % : pvdf % = 40 % : 60 %, dbp % + pvdf % : sio2 % = 70 % : 30 %, the separator get

    但用其制備的電池循環30周期后容量發生衰減，並且電池高溫性能差， 70下電池燃燒;強化聚合物膜的最佳制備配比條件為: dbp : pvdf為40mass % : 60mass % ， dbp含量與pvdf含量之和與納米sio2含量比值為70mass % : 30mass % ;強化電解質隔膜的室溫離子電導率也可達4 10 - 3s / cm左右，完全能滿足聚合物鋰離子電池的使用需要;機械強度遠遠大於流延法制得的隔膜，達到108 . 84mpa 。
  10. The mathematic models of sampling and reconstruction are analysed respectively, and an important conclusion is got, that oversampling can decrease high frequence distortion of d / a output signal and the difficulty of designing lowpass filter. as a result the signal quality is improved

    分析了采樣和重構的數學模型，得出了一個重要結論:過采樣可以減少d / a輸出信號的高頻端衰減失真，可以降低低通濾波器的設計難度，從而提高波形質量。
  11. Mass attenuation coefficient

    質量衰減系數
  12. The effect of variation in surge shaft section size upon the reflection of water hammer pressure and the speed of quality fluctuation attenuation

    調壓井斷面尺寸變化對水錘壓力反射及質量波動衰減速度的影響
  13. For the other hand, la2o3 additives can improve the activation process and discharge capacity obviously for zinc electrode. the appropriate content of la2o3 additives in zinc electrode can increase the electrochemical properties of the zinc electrode. zn / ni battery with the zinc electrode containing calcium additive showed better discharge capacity and charge - discharge cycling life

    以鋅酸鈣為活性物質的鋅電極能得到更高的鋅利用率，且以鋅酸鈣為活性物質的鋅鎳電池的循環壽命明顯優于以氧化鋅為活性物質的鋅鎳電池；兩層隔膜的鋅鎳電池的放電容量高於一層隔膜的鋅鎳電池，容量衰減速度也明顯小於後者。
  14. Meanwhile we find that decay constant fn and the tt mass mv monotonously decrease as nuclear matter density increases

    我們同時發現介子的衰變常數f _和質量m _隨著核物質密度_ n的增加而單調遞減。
  15. To ensuring the transmitting quality, the influences of atmospheric attenuation and turbulence to laser transmission is analyzed in the paper

    為了保證無線光通信的質量，本論文還深入分析了大氣衰減效應和大氣湍流效應對激光傳輸的影響。
  16. This paper mainly discusses the design principles and chief techniques of a digital accessing system for power - line communication net ( plcn ). the technology of low bit rate speech compression high - speed modem based on plcn adaptive equalization to the channel anti - jamming and anti - fading are applied in this system. so speech tele - control data and tele - protection signals can be transmitted high quality in the band - limited channel

    該系統綜合應用了低比特率語音信號壓縮編碼技術、基於電力通信網的高速調制解調技術、信號傳輸的通道自適應均衡技術和抗干擾、抗衰減技術，可在帶限通道中高質量的傳輸語音、遠動數據和遠方保護等信號，具有較高的整體性能。
  17. Adsorption fouling can not be created easily and the permeate flux decreases limitedly

    在蛋白質膜分離過程中，膜表面不易產生吸附污染，膜通量衰減程度較小。
  18. Especially, the algorithm obtains the phantom ' s mass attenuation coefficient and spectrum of the ct system at the same time

    特別地，該演算法在給出系統的x射線能譜估計的同時，還給出了構成模體的物質關于不同能量的光子的質量衰減系數的估計。
  19. In order to eliminate the beam - hardening artifacts, most current correction algorithms have to assume that the x - ray beam spectra are known and the mass attenuation coefficients of the detected object related to different energy are given

    目前的多數射束硬化校正演算法需假設已知ct系統的x射線能譜，並已知構成被測物體的物質關于不同能量的光子的質量衰減系數。
  20. Firstly, an estimation algorithm for spectrum of the ct system is presented in the paper by using a standard cylinder or wedge phantom, where the mass attenuation coefficient of the contained material of the phantom is not necessarily to be known

    本文首先給出了由標準均勻圓柱狀模體或楔狀模體估計ct系統的x射線能譜的演算法，該演算法不必已知構成模體的物質關于不同能量的光子的質量衰減系數。
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