極低阻抗 的英文怎麼說
中文拼音 [jídīzǔkàng]
極低阻抗
英文
negligible impedance-
Semiclassical calculation of the absorption and recurrence spectra of he atom in perpendicular electric and magnetic fields
低阻抗二極體產生的強流電子束能譜分佈的數值模擬Based on extensive investigation of construction technique history of chinese ancient buildings, the structure method, structure developing history and seismic behavior of chinese ancient timber structure buildings are analyzed in several respects of the structural system and form. through a series of experiments on constituent parts of chinese ancient timber building structure, including the tests on the corbels and brackets called dougong subjected to low cyclic reversed loadings, the tests on the wooden frame using the tenon - mortise joints as connections of column and beam subjected to low cyclic reversed loadings, the tests on vibration isolation effect of friction and slippage between column footing and their socle base, and a series of shaking table tests on a chinese ancient timber structure palace building mode under artificial earthquake at serving conditions, destroyed conditions and reinforced conditions, many valuable results of structures such as moment - curvature hysteretic loops of dougong structure and tenon - mortise joints under low cyckc reversed loadings, the static function, the seismic performance, energy dissipation, vibration reduction, energy - loss mechanism, nechanicalmode and failure mode were studied. aplenty of valuable parameters of the structure system were obtained, such as the natural period of structure, vibration modes, damping ratio, factor of vibration isolation, oscillate amplitude of ineitial accebration, velocity and displacement, magnitude of slippage, and the mechanism of structure failure and collapse etc. based on these research, the complete analysis of ancient timber structure under earthquake were carried out in which including mechanism analysis method, calculating mode, strength analysis of members and joints, strengthening methods for serving damaged ancient timber structure buildings were also taken into account
依照宋代《營造法式》建造了抬梁式殿堂木結構構件及結構模型，對中國古代木結構中的典型構造如：柱腳在礎石頂面平擱簡支、柱架榫卯連接、柱高不越間之廣、側腳、生起、斗拱等的構造機理及結構功能進行了量化分析和實驗研究： （一）通過木柱石礎靜摩擦試驗，測定了柱腳與石礎古鏡面間的摩擦系數及摩擦力隨上部結構荷載變化的規律； （二）通過單柱承載力試驗，測定了古建築中木柱的受力變形特徵、破壞模式、及模型材料的變形模量、極限承載力、極限變形等參量； （三）通過柱架低周反復荷載試驗，測定了柱架的抗側移剛度、柱架恢復力特性及滯回曲線、榫卯張角剛度及其變化規律、柱架及榫卯的極限承載力和極限變形、及榫卯減振參數； （四）通過斗?低周反復荷載試驗和受壓試驗，測定了古建築木構件與木構件間摩擦系數，斗?抗側移剛度，斗?恢復力特性及滯回曲線，斗?抗壓極限承載力及受力變形規律； （五）通過抬梁式殿堂間架模型振動臺試驗，測定了殿堂木構架結構自振周期，地震反應振形、阻尼特性及阻尼比；按結構分層特點對柱腳、柱頭和斗?層上的屋蓋的地震反應採用多點同步測量，對柱根滑移、榫卯變形、斗?的變形、復位、耗能減振參數等進行了定量分析。In acid copper sulphate solution, the nc copper has a more negative corrosion potential which is decreasing with reducing the grain size and diffusion impedance was only found in the as - prepared and as - annealed at 180 ? nc copper due to the diffusion within the pores and channels on the surface. both the tafel plots and eis study demonstrated that the nc copper exhibits a higher corrosion current and lower polarization resistance than its mc couterpart
在酸性硫酸銅溶液中，納米晶銅的腐蝕電位比微米晶銅要負，並且隨著晶粒尺寸的減小而降低。 eis研究表明，未退火的和180退火的納米樣品中發現了擴散阻抗，與表面孔洞和通道中的擴散有關。極化曲線外推法和電化學阻抗研究都表明納米晶銅的腐蝕電流比微米晶銅高，而極化電阻要低。We have designed different measurement instruments according to the methods. the instrument used to measure electrode is a high precision multi - channel system constructed with a iaadc as the core and high input impedance amplifier and low input current multiplexer
對于硫屬玻璃電極，我們設計了以高精度的adc為核心，配以高輸入阻抗低噪聲的前置放大器和低漏電流多路模擬開關的多路精密電極測量系統。The voltage of lithium - intercalation reaction, impedance and structural stability of intercalation - type cathode material were analysed and calculated. theoritical results show that the reaction voltage depends on the content of lithium and the bond energy, and that the key ways to lower the electrode impedance are to increase the electronic conductivity of the electrode and the diffusion coefficient of lithium ion in the host and to decrease the size of powder. in addition, the thermal stability of lithium - insertion structure can be improved by using crystallographic co - lattice theory and doping treatment
本文從嵌入式陰極材料的嵌鋰反應的電壓、阻抗及結構穩定性的分析和理論計算著手，得到了電壓取決于基體中各種離子間的鍵能及鋰含量、降低電極阻抗的關鍵是提高電子型導電性和li ~ +在基體中的擴散系數及減小粉末粒度的理論依據及其利用晶體的共格原理和摻雜改性的方式來提高材料嵌鋰結構的熱穩定性的設計思路。Three phases electron beam flow model for low - impedance interse - current pinched electron beam diode
低阻抗強流箍縮電子束二極體的3階段電子束流模型We have made three - dimension electric conduct grid by hand and we have successfully used it as anode grid in lead - acid battery. this kind of three - dimension electric conduct grid can improve the utilization of pam by 7 - 9 % in different discharge current density and can reduce the plate electrochemical impedance to one tenth of the normal plate. also this kind of grid can improve the marginal reaction current density in a certain degree
我們通過手工製作了三維導電體板柵，並成功的應用於電池的正極作為正極的板柵，這種三維導電體板柵能夠在各種不同的放電電流密度下提高正極活性物質利用率7 9 ，能夠使電池正極板的電化學阻抗降低到普通板柵的1 10左右，使正極板的極哈爾濱j _程大學碩十學位論文限反應電流密度略有所提高，但是這種板柵的耐腐蝕性能很不理想，使得所製作電池的壽命很短。From the experiment we have found out that the carbon fibre can improve the anode performance when it was used as pam additive and meanwhile it can have some benefits to the anode life. when its content at 0. 2 - 0. 3 % in pam can achieve its best result and under this situation it can improve the utilization of pam by 5 % at different discharge current. carbon fibre and sulfate sodium is used as complex pam additive and its effect is better than that of carbon fibre which alone is used as additive
通過實驗我們發現，碳纖維作為鉛酸電池的正極活性物質添加劑能提高鉛酸電池正極的性能，並且對電池正極板的壽命有一定的好處，當碳纖維在正極活性物質中的含量為0 . 2 0 . 3能得到最理想的效果，這個時候能在各種不同的放電電流下提高正極活性物質的利用率5左右，並且能夠使極板的電化學阻抗降低。The electrochemical impedance spectroscopy of nickel electrodeposition indicates that nickel electrodeposition occurs in two steps, the medium frequency inductive loop is ascribed to the relaxation of the electrode coverage by an adsorbed intermediate such as niohads, the low frequency capacitive loop may be due to the inhibition of nickel electrodeposition by adsorbed hydrogen. the mechanism and equivalent circuit of nickel electrodeposition were proposed on the basis of the analysis of electrochemical impedance spectroscopy
不銹鋼電極上電積鎳的電化學阻抗行為表明氨絡合物體系鎳電沉積過程是二次放電過程，中頻感抗弧是由於中間吸附產物nioh _ （ ads ）的弛豫現象引起，低頻容抗弧可能是由於吸附氫原子對鎳結晶的阻滯作用引起，依據實驗結果提出了氨絡合物體系鎳電沉積的反應機理和等效電路模型。The result of macro - quality experiments show : mineral admixtures markedly slow the hydrating velocity of cement slurry, decrease and delay the hydrating max - temperature, in which steel slag is more effective ; expansive agents compensate concrete shrinkage, enhance the concrete dense degree, strengthen the interfacial layer between fiber and cement matrix and improve the physical mechanics qualities of acic ; minimal admixtures markedly improve the concrete workability property, increase the concrete later intensity & density and the capability of anti - chemical attack and anti - permeability ; hybrid fiber reinforces the toughness of obviously acic by the means of anti - cracking effect of fiber with different sizes and different properties in the corresponding construction levels
實驗結果顯示：鋼渣摻合料能顯著減緩水泥漿體水化速率，降低砂漿的水化溫升並延遲最高溫升時間；補償混凝土收縮，提高混凝土密實度，加強纖維與水泥石的界面粘結，增強混凝土力學性能，但不能明顯改善混凝土韌性。混雜纖維通過纖維的不同尺度與不同性質在相應的結構層次上產生阻裂效應，增韌鋼渣防滲抗裂混凝土；增加混凝土的破壞極限能，極大提高混凝土抗彎曲能力和韌性指數，改善混凝土脆性。We use a isolating impedance between the gas diode and the silicon avalanche diodes, to permit the gas tube to operate properly and to permit the low energy avalanche diode to perform its voltage limiting function - without being damaged
我們在氣體二極體和硅雪崩二極體之間使用一個隔離阻抗，使氣體放電管正常地運作，同時又使低能量的雪崩二極體發揮其電壓限制功能，而不遭受損害。Diode switches or voltage controlled varactors implement dual - band resonators such that they can offer low impedance at the second harmonic of each frequency band, while, in some cases, presenting high impedance at the fundamental frequency as an rf choke circuit
利用二極體開關或電壓控制變容器實施雙頻共振器以提供在雙頻操作中每一個頻段之二階諧波的低阻抗，同時在一些實施例里也提供主頻段的高阻抗、兼具有射頻阻塞電路作用。The properties of product : extremely high wear - resisting performance, an extremely low cofficion ; fine person who lubricate by oneself, it si unnecessary the note oil, use the difficult card to die under the abominable condition ; antistatic, it is fire - retardant to resist, ageing - resistant, able to bear the corrosion of chemistry ( sour alkali and organic solvent ) ; can bear and assault, shake repeatedly ; mechanical performance is excellent, light, install it conveniently
產品性能：極高的耐磨性能，極低的摩擦系數，優良的自潤滑性，不用注油，在惡劣條件下使用不易卡死；具有抗靜電，抗阻燃，耐老化，耐化學（酸、堿和有機溶劑）的腐蝕；能承受反復沖擊、震動；機械性能優異，重量輕，安裝方便。The electrochemical impedance spectroscopy of anodic reaction shows that the formation of black nickel was mainly controlled by electrochemical reaction at low anodic potential, and is mainly controlled by electrochemical reaction and diffusion at high anodic potental. with the increasing of anodic potential., the formation of black nickel is still controlled by electrochemical re
陽極反應的電化學阻抗譜表明，氧化電位較低時ni （ oh ） :氧化生成黑鎳的過程主要受電化學反應所控制，電位較高時，黑鎳形成過程主要受電化學反應及擴散混合控制，電位進一步增加，析氮反應占據主導優勢，陽極氧化過程仍主要受電化學反應及擴散混合控制。Parallel rlc. 2 complex poles. presents high impedance ( r ) at resonance which is at 1 / ( 2 * pi * sqrt ( l * c ) ). impedance decreases away from resonance
並聯電阻電感電容。可獲得兩個復雜的極點。在諧振點獲得高阻抗，然後離諧振點越遠阻抗越低。The piezoelectric quartz crystal impedance analysis is a new method to study the quartz crystal resonance. it has been well established as a powerful tool capable of responding in situ to an electrode mass change down to the nanogram level and the change of the solution viscosity and density, and it is also expected to find wider applications in chemistry, life science, surface science, food science, environment monitoring and so on
壓電石英晶體阻抗分析法是研究石英晶體諧振的新技術，可獲取多維壓電信息，從而現場動態監測電極表面低至納克級的質量及溶液粘密度等響應，可廣泛應用於化學、生命科學、表面科學、食品科學、環境檢測等領域。While testing ofeis at different depth of dischargeand charge - discharge at different charge - discharge rate reveale that, these material indicate lower conductivity at highcharge - discharge rate, resulting in bad electrochemical perforemence. melting - cooling and inorganic sol - gel were adopted, which facility - simpleand operating - easy, to prepare v _ 2o _ 5 xeroxes as positive material of li - ion battery. the comparision of structual and electrochemical performance between thesecathode materials were investigated for the first time. their electrochemicalbehaviorswerestudiedbygalvanostaticcharge - discharge, cyclicvoltammetry ( cv ), and electrochemical impedance spectroscopy ( eis ) techniques. the results indicte the sample that prepared by melting - cooling revealed moreexcellent performance at low charge - discharge rate, which achieved a high initialdischarge specific capacity of approximate 320 mah ? g - 1
通過各種充放電測試，循環伏安（ cv ）曲線以及電化學阻抗譜（ eis ）等測試手段對材料的電化學性能進行表徵，結果發現，在低倍率放電下，熔融淬冷法合成的材料具有更好的電化學性能， 0 . 1c恆流放電至1 . 8v時首次放電容量達320mah ? g - 1 ，並且發現， v _ 2o _ 5作為正極材料組裝成的鋰離子二次電池，除首次循環具有較大的不可逆容量外，其餘循環可逆且容量保持能力較好， 20次循環后，容量只衰減了6 . 40 % 。How to improve the accuracy of flux observer is very important in high - performance motor system, especially at low - speed or zero - speed situation. high - frequency signal injection is believed the efficient method to solve these difficuilties
高頻信號注入來實現極低速甚至零速情況下磁鏈位置的觀測是目前該領域的熱點研究內容，本文採用的是d - q軸阻抗差異法。Excitotoxicity, associated with stroke and neurodegeneration, is triggered primarily by massive ca2 + influx arising from overactivation of glutamate receptor channels of the n - methyl - d - aspartate ( nmda ) subtype. although approaches to treatment of these disorders with antagonists of nmda receptor ( nr ) have been testified to be effective in animal models, successful therapy in humans was limited by the severe side effects of complete nr blockade for their space window and time window
已有的nr受體拮抗劑或阻斷劑均為人工合成的小分子藥物，能彌散通過血腦屏障（空間窗過大） ，作用選擇性低，病變腦區及非病變腦區都會受到影響，而且由於神經元可逆性損害的「時間窗」極短，人們難以適時使用有效的神經保護藥物，這些均導致已有的藥物難以進入臨床。分享友人