相對電容率 的英文怎麼說

中文拼音 [xiāngduìdiànróng]
相對電容率 英文
relative dielectric constant
  • : 相Ⅰ名詞1 (相貌; 外貌) looks; appearance 2 (坐、立等的姿態) bearing; posture 3 [物理學] (相位...
  • : Ⅰ動詞1 (回答) answer; reply 2 (對待; 對付) treat; cope with; counter 3 (朝; 向; 面對) be tr...
  • : Ⅰ名詞1 (有電荷存在和電荷變化的現象) electricity 2 (電報) telegram; cable Ⅱ動詞1 (觸電) give...
  • : 率名詞(比值) rate; ratio; proportion
  • 相對 : 1. (面對面) opposite; face to face 2. (非絕對的) relative 3. (比較的) relatively; comparatively
  • 電容 : electric capacity; capacitance; capacity
  1. Test method for measuring relative complex permittivity and magnetic permeability of solid materials at microwave frequencies

    測量微波頻下固體材料復合和磁導的試驗方法
  2. After analyzing the switching characteristic of mosfet, the object function of optimizing curve of the output capacitance coss is confirmed according to the switching loss caused by output capacitance coss, then the optimized curve of the output capacitance coss is ascertained by applying zoutendijk to seek the optimized value with constraint ; the simulation of switching circuitry and dc - dc circuitry is tested at different frequency in pspice, then the least square method is adopted to fit simulation curves to calculate corresponding energy data

    子線路模擬軟體pspice中進行了mosfet開關路以及典型dc dc轉換線路模擬測試,針不同頻段的測試結果,採用最小二乘擬合法模擬曲線進行擬合,計算出應的能量數據,最後綜合模擬結果確定出減小器件開關損耗,提高dc0c轉換線路效的器件輸出cob優化曲線。
  3. The study has completed the design of two - phase inverter and made up of the two - phase inverter - motor system for experimental use it is a variable frequency adjustable speed system with a open - loop control of rotational speed, which consists of voltage - controlled oscillator circulating assign device inverter circuit and two - phase induction motor a accurate mathematical model is set based on the whole system, and simulator program of dynamic and steady condition is established, which is used to calculate the dynamic and steady performance by kron and symmetrical coordinate converter by simulator calculation and experimental research with specific parameter of the system, a comparison is made between predicted and experimental characteristics, experimental measurements are shown to compare closely with corresponding theoretical result it is compared with some variable frequency adjus table speed system comprising inverter and single - phase induction motor from the system efficiency torque pulsation and the effect of two - phase inverter capacitance based on the conclusion, harmonic cancellation pulse width modulation control of a two - phase inverter - fed induction - motor drive system is researched, which cancelled the low harmonic and improve the system performance

    通過機的kron變換和稱分量變換,建立了系統較精確的數學模型,編制了系統動態及穩態運行的模擬計算程序分別計算系統的動態和穩態性能。通過系統的具體參數進行了模擬運算和實驗研究,實驗和模擬結果進行比較,說明實驗和理論較為一致,並從系統效、轉矩脈動及兩逆變器的影響等方面與各種逆變器和單異步動機組成的變頻調速系統加以比較。在此基礎上,逆變器供-異步動機系統使用諧波抑制pwm控制進行了研究,由於減少了低次諧波,改善了系統性能。
  4. Tan insulating liquids - measurement of relative permittivity, dielectric dissipation factor and d. c. resistivity

    絕緣液體.相對電容率介質損耗因數
  5. Tan insulating liquids - measurement of relative permittivity, dielectric dissipation factor tan delta and d. c. resistivity

    絕緣液體.相對電容率介質損耗因數
  6. On the base of widely investigating and researching, author deems that the conventional reactive power compensation devices used by consumer had many defects with among others : lower response time, remaining residual voltage on the compensation capacitors, and so on. because of existing improper trigging time, it is impossible to realizing balance compensation for 3 - phrase unbalance loads

    本文在充分調研的基礎上,認為目前採用的傳統的無功功補償裝置存在響應速度慢、觸發時刻不合適、補償器上有殘壓、不能實行三平衡補償、網產生污染、不能消除負荷本身產生的高次諧波等弊病。
  7. The paper first reviews the research background and actuality of the filter " s design in china and other country, introduces the meaning of the project and the work of the paper, narrates the theory of the switched - capacitor network and the basic switch building blocks, analyses the related factors of the design of sc filter. such as the selection of the architecture, the trade off of the opamp " s gain, bandwidth, phase margin, slew rate and setting time, the effect of the switch " s on resistor, how to reduce the charge injection and the clock feed - through, the power consumption and the selection of the sampling frequency and so on

    本文首先回顧了濾波器設計的國內外研究背景和現狀,介紹了本課題提出的意義以及本文的主要工作,論述了開關網路原理和基本開關模塊,分析了開關濾波器設計的關因素:路結構的選擇,運算放大器設計中高增益、寬帶寬、位裕度、轉換斜和建立時間等的折中考慮,開關的打開路的影響,開關路中怎樣減少荷注入和時鐘饋通,以及整個路的功耗問題和采樣頻的選擇等。
  8. This paper presents a type of electric power bidding mechanisms based on sealed - hid auction theory, and models generation company ' s equilibrium bidding with order statistic principle, in which the cases that the same and different generation capacity among generation companys is considered, then analyzes the relation between the market clear price and bidding mechanism to explore the optimal bidding mechanism from the view of market efficiency

    摘要基於暗標拍賣理論,提出了一類力競價機制,然後運用次序統計量方法,分別同與不同的發商組成的力競價市場,構建發商的均衡報價模型;在模型求解基礎上,分析競價機制市場清除價的影響,以從市場效的角度探求最優力競價機制。
  9. The existence and quantity of air leak affects the boiler ' s thermal efficiency greatly. so on - line monitoring and diagnosing for the boiler ' s air leak is an important item of energy - saving potential diagnosis in power station, there is n ' t an effective method to solve this problem and few researches are made on this task at the present time

    漏風的存在和漏風量的大小站鍋爐熱效的影響十分明顯,在線確定鍋爐系統各區域的漏風狀況是火力發機組節能潛力診斷的一項重要內,但此目前國內外尚無有效的方法,關的研究亦十分少見。
  10. With fast development of our country " s gas industry and air ' s increasingly serious contamination in city, using gas instead of coal and supplying energy in high efficiency and cleanliness has become necessary way in city. there are different problems in the current heating ( air conditioning ) systems. in the cogeneration system, heat and power affect each other, heating - pump heating ( aie conditioning ) system can not satisfy the peak load very well, the cost of gas fuel in boilor heating sestem is so high. the high generating efficiency of the diesel - engine two - sourse heating ( air conditioning ) systems is limited in range of 100kw - 1000kw, the heating scope is so limited. combined cycle of two sourse heating ( air conditioning ) system is most suitable selection to buesness community with big scope my paper aim at this syetem ' s primary question when it is applied in our country - - - - bringing project into execution and technology economy feasibility and off - design performence, combined with a certain demonstrating project in beijing buesness community, going along with calculating and analyzing, drawing out some efficient datas and conclusions, based on this, bringing out primary alements affecting combined cycle of two sourse heating ( air conditioning ) system " economics

    聯產系統熱互牽連,熱泵供暖(空調)系統不易很好地滿足尖峰負荷,鍋爐供暖系統供熱中天然氣燃料構成的成本過高,內燃機雙源供暖(空調)系統的高發僅限於100kw - 1000kw負荷范圍,供熱面積有限。于大面積的商業園區、居民小區,燃燒天然氣的燃氣-蒸汽聯合循環雙源供暖(空調)系統是最佳選擇之一。本論文針該系統在我國應用時的主要問題- - -方案的技術實施與技術經濟可行性,結合北京某一商業園區示範工程,進行了系統的計算與分析,得到了有效的數據與結論,在此基礎上,提出影響聯合循環雙源供暖(空調)系統經濟性的主要因素,並進行敏感性分析,得出有益的結論;最後通過各種供暖方案的比較分析回答了某些人該系統的疑慮和不解,並指出系統的優化方向。
  11. Because of the clamping capacitor and the interleaved structure, it has some good features compared with other flyback converters, such as : the topology is simple and can be realized easily ; the voltage spike of the power switch is availably restrained and without leakage - inductance energy loss ; the ripple of the input and output current is reduced, correspondingly, the volume and weight of the output and input filter is also significantly reduced

    由於箝位的加入,于其他類型的反激式變換器路,該拓撲具有一些獨特的優點:路結構簡單且易於實現;無需另加輔助開關管,實現了開關管的有源箝位,抑制了開關管的壓尖峰;提高了輸入、輸出流的脈動頻,減小了輸入及輸出濾波器體積。
  12. The clamping diodes conduct only once in a switching period, and the resonant inductance current is smaller in zero state, leading to a higher efficiency and reduced duty cycle loss. the operation principle of the improved converter and the comparison with the original converter are analyzed in this paper. the effect of the blocking capacitor in series with the transformer or resonant inductance is discussed, and a best scheme is determined

    本文將諧振感和變壓器交換位置,使變壓器與滯后橋臂連,這樣箝位二極體在一個開關周期中只導通一次,同時零狀態時諧振流較小,有利於提高變換效和減小占空比丟失,本文分析改進后變換器的工作原理,並與改進前的變換器進行比,討論隔直在不同位置變換器工作的影響,確定一種最佳工程方案。
  13. The system can generate sweep frequency signal with frequency range from 100khz to 150mhz and power range from - 40dbm to + 18dbm, and measure the gain and phase of the crystal. according to the gain and phase information and the iec - 444 standard, crystal parameters can be calculated, such as nominal frequency, series resistance, shunt capacitance, motion capacitance, motion inductance, q factor and so on

    該系統能產生頻范圍達100khz 150mhz ,功范圍為? 40dbm + 18dbm的掃頻信號,並能晶振的增益和位差進行測量,其測量結果按照iec - 444晶振測量標準進行實時處理和計算,從而得到晶振的串聯諧振頻、並聯諧振頻、等效阻、靜態、動態、動態感和品質因數等主要參數。
  14. Following atm and 1000m ethernet network, wlan is a hit point in the communication research field now, and is thought highly as the future of communication network

    該方案克服了磁波頻資源的約束,能高速傳遞大量信息,且成本低、安全性高,適合寬帶傳輸的要求。
  15. Nano - sacle coo is apt to dissolve in the electrode homogeneously, and better conductive net of coooh come into being, thus contribute a lot to the procedure of the activation. the electrode with nano - scale coo and cnts shows higher discharge voltage and higher discharge capacity. nano - scale additives can improve the specific capacity of the electrode, the volume specific capacity and the mass specific capacity of the electrode with nano - scale coo are 784mah / cm3 and 224mah / g, respectively

    結果表明:添加劑為納米coo的極的活化性能最好,納米coo于普通coo能更加均勻的分佈在鎳極內,也更易溶解、反應生成coooh導網路,從而加快了鎳極的活化進程;添迦納米coo和添加cnts的極片具有較高的放位和較大的放量,納米添加劑能有效提高鎳正極活性物質的放和利用;納米添加劑可以有效地提高鎳正極片的量密度,其中添迦納米coo的極片體積量密度達到784mah cm ~ 3 ,質量量密度達到224mah g ;添加cnts的極片體積量密度達到778mah cm ~ 3 ,質量量密度達到223mah g 。
  16. We design inversion control circuit with cmos figure pll cd4046 act as core and microprocessor 80c196kc act as assistant controller. adopting a control method that combine fuzzy controller and pll control, improve induction heating power succeed in startup. adopting electric current voltage pair closed loop feedback design, with trough route capacitance voltage and trough route electric current act as pair closed loop feedback signal, guarantee induction heating power output accuracy

    系統主路的元器件參數進行了詳細的計算;設計了以cmos數字鎖環cd4046為核心、以80c196kc作為輔助控制器的逆變控制路;採用了模糊邏輯與鎖結合的控制技術,提高了源的啟動成功;採用流、壓雙閉環反饋方案,採用槽路壓和槽路流作為反饋信號,從而保證了源功的輸出精度。
  17. The simulated results show that we can improve the sensitivity by setting the optical bias at / 2, reducing the gap of electrode, increasing the overlap integral factor, reducing the insert lose, adopting suitable segmentation number, increasing the electrode length, increasing the optical power, reducing the wavelength and the relative intensity noise and reducing the receive bandwidth ; obtain the wider bandwidth utilizing reducing the electrode length and the capacitance of modulator, segmentation the electrode ; increase the dynamic range using lowering noise, increasing the optical power at the detector and lower optical bias

    通過計算得知,使傳感器位偏置為/ 2 ,減小極間距,提高光重疊因子,減小器件插入損耗,採用合適的分段數,增加極長度,增大光功,降低激光的波長,減小強度噪聲,減小接收帶寬,提高靈敏度的效果是非常明顯的。而減小天線長度,降低調制器極分段,都可以獲取較大的帶寬。降低系統噪聲;增加到達探測器的光功,採用較低的光學偏置,都可以增大線性動態范圍。
  18. Waveguide type dielectric resonators - general information and test conditions - measurement method of complex relative permittivity for dielectric resonator materials at microwave frequency

    波導型介質諧振器.通用信息和試驗條件.微波頻段的介質諧振器材料的復合相對電容率測量方法
  19. Waveguide type dielectric resonators - part 1 - 3 : general information and test conditions - measurement method of complex relative permittivity for dielectric resonator materials at microwave frequency

    波導型介質諧振器.第1 - 3部分:通用信息和試驗條件.微波頻段的介質諧振器材料的復合相對電容率測量方法
  20. During the accelerated thermal aging and ultraviolet radiation aging of pmma which is used as the core materials of fiber in pof, it was found that the relative permittivity of pmma decreased significantly to approximately equal to its square refractive index

    摘要實驗中觀察到用作塑料光纖纖芯材料的純有機玻璃(聚甲基丙烯酸甲酯)在加速熱老化和紫外老化過程中其相對電容率急劇下降至大約等於其折射的平方,即有機玻璃由極性聚合物變為非極性聚合物( 「全去偶極子極化」現象) 。
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