dc potential 中文意思是什麼
dc potential
解釋
直流電熱,直流電位-
In a ccp system, there is a discontiguous characteristic on tuned substrate self - bias. when the impedance between substrate and ground was made increasingly inductive, a large negative dc potential developed on the substrate
在ccp （ capacitivecouplingplasma ）中調諧基片偏壓具有不連續變化現象，當基片之間為漸增的感抗時，基片上會產生漸增的負偏壓。 -
The shorter the interval between the two pulses of the current wave, the fewer strikes the varistors can endure. at the same time, the dc ljima changes fast - slowly - fast alone with the experiment continuing. microstructual disorder, such as variations in the height of the electrostatic potential at grain boundaries and electrode protrusions into the zinc oxide varistors, causes substantial temperature rise in a microscopic region around the defect and is the source for failure
雷電的多重閃擊對雷電過電壓保護器件的影響更加嚴重，本文首次採用不同間歇時間雙脈沖電流沖擊對氧化鋅電阻進行了多次試驗，試驗表明：氧化鋅電阻在雙脈沖電流沖擊下更容易出現老化破壞現象，間歇時間越短，電阻能耐受的沖擊次數越少；此外，直流u _ （ 1ma ）值隨沖擊次數的增加具有快一慢一快的下降過程。 -
At present, in an attempt to stimulate specific antitumor immunity, experimental models and clinical studies are currently evaluating the potent antigen - presenting capacity of dc combined with single or multiple tumor antigen epitopes. however, there are several problems in utilizing pulsing dc with synthetic immunodominant peptides from identified antigens. 1 ) the potential induction of tolerance ; 2 ) the need to determine the patient ' s hla haplotype, the limitation of therapy to patients whose tumors express defined specific tumor antigens in the context of the correct hla phenotype, the unavailability of peptides for all hla haplotypes ; 3 ) the lack of cd4 help cell - related epitopes for most antigens ; and 4 ) the ctl resulting from such protocols have a good in vitro capacity to kill peptide - pulsed target cells but only a modest capacity to kill tumor cells
但是，學者們發現這一療法存在著如下的缺陷：單一ctl表位抗原肽的應用其抗腫瘤作用弱於多種腫瘤抗原的聯合應用，且有誘導免疫耐受的潛在危險，有時反而會促進腫瘤的生長；事先需對患者的hla單倍型進行鑒定，以確定ctl表位與hla單倍型是否匹配，目前尚缺乏能與所有hla單倍型相匹配的ctl表位，從而限制了這一療法的應用；這一療法所產生的ctl在體外能有效殺傷經腫瘤抗原肽共孵育過的靶細胞，但對腫瘤細胞的殺傷能力較弱：這種l表位抗原肽缺乏cd4汀h細胞相關的表位，因此，不能誘導有效的th細胞免疫應答。 -
The electrical damping within the whole subsynchronous frequency range is calculated. the impacts of the unit interaction factor between hvdc and turbine generator, the dc power level, the firing delay angle and the parameter settings of hvdc controller on the have the potential danger of subsynchronous oscillation
在整個次同步頻率范圍內，計算得到了系統電氣阻尼，並詳盡地分析了同步發電機與hvdc的耦合程度、直流輸送功率水平，換流閥觸發角大小以及控制器參數等因素對系統電氣阻尼的影響。 -
Presents the conceptual design of standard dc potential dividers and its special features and expounds the principle of equal - potential screening technique and actions taken for its application in standard dc potential dividers
介紹了研製標準直流分壓箱的設計思想及其特點，闡述了等電位屏蔽技術的原理和應用於標準直流分壓箱中所採用的措施。 -
Firstly, this paper introduces the asynchronous motor model, and compares it with the dc motor ’ s. then the paper studies the principle of vector control, and proposes an improved current model of rotor flux observer. this paper also studies the three - level inverter ’ s topology, working principle, the neutral - potential unbalance mechanism and its controlling strategy. the paper especially studies the svpwm in details. the interface between the vector control and the three - level inverter is studied in details, including the generation of reference voltage vector, its judging of the sector and triangular regions, and the working mechanism after it sent into three - level inverter. when synthesizing the reference voltage vector, select the vector which only includes p and o states as the starting vector, thus eliminate the vector shift problem when sector changes. this paper fully takes advantages of the powerful functions of matlab / simulink to set up the simulation model. this construction is very explicit. the simulation results verify the inverter voltage output is correct, the rotor flux is steady, the asynchronous motor ’ s dynamic and steady state performances and speed modulation are excellent
本文首先介紹了異步電機的數學模型，在此基礎上將異步電機的數學模型與直流電機的數學模型進行了比較;然後介紹了矢量控制的基本原理，採用了一種改進的轉子磁鏈電流型觀測模型;對三電平逆變器的電路拓撲、工作原理、中點電位不平衡的機理及控制方法進行了介紹，詳細分析了空間矢量脈寬調制策略。本文對異步電機的矢量控制與三電平逆變器之間的介面進行了詳細的研究，包括:參考電壓矢量的形成、所落扇區與具體小三角形區域的判斷、送入逆變器之後的工作機理。在參考電壓矢量的合成時，選擇只包含p 、 o狀態的空間電壓矢量作為起始矢量，解決了扇區切換時的矢量突變問題。 -
In this paper, reversibly nonlinear transport in both dc response and ac response and relatively electrical conduction mechanism of polymer / conducting filler composites were reviewed, and the potential applications of polymer / conducting filler composites is outlooked
文中闡述聚合物導電填料復合材料在直流電、交流電作用下的可逆非線性導電行為，以及其相關導電機理，並展望非線性導電特性的應用前景。 -
When the motorcycle is braking or slowing down, the kinetic and / or potential energy is fed back to the battery, so the running distance can be extended and the energy efficiency is improved. an asynchronous motor is employed in this new system which can overcome the traditional dc drive system bugs and to reduce the cost and maintenance. in addition, the switches of dc / dc converter switch under zero current and zero voltage conditions, which can also reduce the switch losses, electro magnetic interference ( emi ) and prolong its life
該系統在功能上實現了車輛剎車減速或下坡制動時能量的回饋，達到節能、提高能量使用效率和增加車輛行駛距離的目的；採用交流異步電機，克服了傳統直流驅動系統的諸多缺陷，降低了成本，減少了維護；採用zczvs技術，降低了電磁干擾和損耗，提高了效率；另外，在逆變主電路中採用ipm模塊，簡化了系統結構，節約了空間，提高了整個系統的可靠性和經濟性。 -
However, when the inductance was increased beyond a certain critical value, the dc substrate potential changed discontinuously to a small, sometimes positive, value
但當電感增加超過一關鍵值后，基片電位不連續地減小，有時變為正值。 -
The morphology, chemical compositions, crystal structures and some properties of these obtained nanowires were systemically characterized. < wp = 6 > because of their novel properties and unique structures, one - dimensional nanostructrue semiconductor materials have generated a tremendous amount of interests in fundamental and potential promising applications in electronic and photoelectronic devices. we fabricated cdse, te and cdte nanowires by direct current ( dc ) electrodeposition in porous anodic aluminum oxide ( aao ) templates
本論文採用電化學模板合成法制備出了幾種新型的納米線，並對它們的形貌、組成、晶體結構及其他一些性質進行了表徵；發展了一種用紫外可見光分光光度法分析電沉積在導電玻璃上的ni - fe合金鍍層的方法；用模板脈沖電沉積法制備了fe20ni80 / ag多層納米線，並對它的形貌進行了初步表徵。 -
Preliminary studies have been shown that diamond - like carbon ( dlc ) had a great potential as a durable, wear and corrosion - resistant coating for biomedical implants. surprisingly, carbon nitride ( cnx ) has not received much attention recently in the biomedical field, despite its performance comparable to or greater than that of dlc in this study, cnx and dlc coatings were prepared using the standard dc magnetron sputtering at room temperature
本文採用磁控濺射（ magnetronsputtering ）技術嘗試在單晶si樣品表面沉積制備碳氮薄膜，研究了薄膜的結構特徵、性能與制備工藝參數之間的規律，並考察細胞在碳氮薄膜上的吸附特性隨制備工藝參數的變化機理，並與類金剛石膜在凝血時間、細胞吸附特性等方面做了對比。
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