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ac systems
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  交流系统
     The simulation results show that the new controller can not only improve the performance of DC systems, but also enhance the voltage stability of AC systems.
     仿真结果表明 ,所设计的新型控制器能够改善直流系统的性能 ,并提高交流系统的电压稳定性
短句来源
     The software design and its application in network controlled AC systems are introduced.
     介绍了软件设计及其在网络化控制交流系统中的应用。
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     Influence of Active Power of MIDC Systems on Loss of Inverter-side AC Systems
     MIDC系统有功功率分配方式对受端交流系统网损的影响
短句来源
     In order to improve the accuracy of the traditional simulation model of HVDC(High-Voltage Direct Current Transmission) system,a novel hybrid-model simulation algorithm is proposed to analyze the transient stability of AC/DC system,in which the dynamic phasor theory and the traditional electro-mechanical transient models are respectively applied to the modeling of HVDC and AC systems.
     为了解决高压直流输电(HVDC)系统传统仿真模型的精度问题,提出了一种新的混合模型仿真算法来进行交直流系统的暂态稳定分析,分析中对HVDC采用动态相量模型,对交流系统采用传统机电暂态模型.
短句来源
     The application of HVDC has changed the structure of origin systems, so the challenges about applicability of origin controllers emerge, and the focus fixes on how to cooperate HVDC controllers and origin controllers in ac systems.
     HVDC的投入使用改变了原有的系统结构,在对原有各控制装置的适用性提出挑战的同时,也让人们关注现有HVDC控制如何与交流系统控制装置一起协调工作。
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  空调系统
     Design of Cooling/Heating Floor AC Systems in Residential Buildings
     住宅用冷暖地板空调系统设计
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     Application of Multimodal Intelligent Control Strategy in AC Systems
     多模态智能控制策略在空调系统中的运用
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     Application of Accumulative Electric Hot Water Boilers as Heat Resource in Medium/Small Scale AC Systems
     水蓄热电锅炉作为系统热源在中小型空调系统中的应用
短句来源
     Applies the theory of VE to the technical and economical analysis of HV&AC systems of business office buildings,calculates the VE coefficients of different schemes and gets the best one ,which can save about 30 percent of investment.
     运用价值工程原理,对商办楼的暧通空调系统进行了技术经济分析,计算出不同方案下系统的价值系数,得出了最优方案,可节约投资30%左右.
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     The Program for Calculating Hourly Cooling Loads of AC Systems
     空调系统逐时冷负荷计算程序
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  “ac systems”译为未确定词的双语例句
     Development of Station Type Polymeric Metal Oxide Surge Arrester for 500kV AC Systems
     交流500kV系统用电站型复合外套金属氧化物避雷器的研制
短句来源
     This paper introduces the basic functions of SA4828 and the design of software and hardware for application in speed controlling of the AC systems.
     本文介绍了SA4828的控制原理及在交流调速应用中的硬软件设计方法。
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     Based on this model and the models of AC systems and DC transmission line, the whole system equations are obtained and solved by the Newton-Raphan method.
     以此模型为基础,根据换流站的接线方式并利用直流输电网络的模型,组成整个直流输电系统的数学模型和相应的方程式,然后用牛顿—拉夫逊法求解。
短句来源
     Presents the microbe pollution in CC&AC systems, and summarizes the application of UV-GI technique in CC&AC systems.
     本文介绍洁净空调(CC&AC)系统微生物污染的发生及危害,论述国內外紫外辐照消毒(UVGI Ultraviolet Germicidal Irradiation)技术在CC&AC系统中的研究及应用情况;
短句来源
     Application of Modal Series Method in HVDC/AC Systems
     模态级数法在交/直流电力系统中的应用
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  ac systems
We present a two-layer interface model for calculating the interfacial tension and adsorption of a solid A-liquid B-solute C system from the phase diagram and the thermodynamic mixing data of liquid alloys of the three AB, BC and AC systems.
      
Space-phasor model of 3-phase AC systems with current-source power converters part II: calculation of the network interactions a
      
The presented method for the calculation of 3-phase AC systems with DC link indirect converters is based on the perception that the stationary operation of converter systems can be treated as a periodic sequence of similarly transient processes.
      
Space-phasor model of 3-phase AC systems with current-source power converters.
      
Using a technique where EPG recordings can be switched back and forth between DC and AC systems, we demonstrated that the AC EPG pseudotransition waveform (Pt) was equivalent to the DC pd, and thus was correlated with intracellular punctures.
      
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The productivity can be raised and the machining condition can be improved effec-tively in NC turning when the torque-constraining AC system reported in this paperis used.This article introduces the principle of operation,analyzes the dynamicalcharacteristics of the system(with non-linear loop),and presents the main factorsaffecting the stability of the system and the suitable values of the parameters.Thecutting tests have been made in the cutting efficiency and the stability of the system....

The productivity can be raised and the machining condition can be improved effec-tively in NC turning when the torque-constraining AC system reported in this paperis used.This article introduces the principle of operation,analyzes the dynamicalcharacteristics of the system(with non-linear loop),and presents the main factorsaffecting the stability of the system and the suitable values of the parameters.Thecutting tests have been made in the cutting efficiency and the stability of the system.

在数控车削过程中,采用本文所试验的约束扭矩适应控制系统,可有效地提高生产效率并改善加工条件。文中介绍了系统的控制原理,分析了系统(具有非线性环节)的动态特性,提出影响该系统稳定性的主要因素及合适的参数值。对切削效率及系统的稳定性进行了切削试验。

This report points out that chloride ion is a poison for iron catalyst of ammonia synthesis promoted by alkali metal. Results of the experiment on adding KC1 to the system Fe-AC (active carbon)-K showed a very marked decrease in catalytic activity (Fig. la), while the addition of KC1 to the system, Ru-AC-K, activity decreases much less (Fig. lb), indicating that chloride ion is a poison for iron catalyst but has little effect on ruthenum catalyst for ammonia synthesis.Gas chromotographic...

This report points out that chloride ion is a poison for iron catalyst of ammonia synthesis promoted by alkali metal. Results of the experiment on adding KC1 to the system Fe-AC (active carbon)-K showed a very marked decrease in catalytic activity (Fig. la), while the addition of KC1 to the system, Ru-AC-K, activity decreases much less (Fig. lb), indicating that chloride ion is a poison for iron catalyst but has little effect on ruthenum catalyst for ammonia synthesis.Gas chromotographic study on Fe3(C3O4) S-AC and Fe3(C3O4) 3-KCl-AC systems showed that in hydrogen atmosphere the decomposition of the iron salt took place at different temperatures. In the system that contained KC1, the decomposition products CO and CO3 appeared at a higher temperature (Fig. 2a, 2b). In hydrogen atmosphere, the reduction of FeO from pure Fe3(C3O4)3 crystals was almost completed at 300-420℃, but FeO of the Fe3(C3O4)3-AC system was reduced only slightly even at 500℃. Under the same condition, FeO from the Fe3(C3O4) 3-AC-KCl system was reduced much more as indicated by the amount of water evolved (Fig. 2c). It was therfore postulated that the presence of KC1 lowered the degree of dispersion of FeO and made it more easily reduced to form large particles of a-iron of low or no catalytic activity.X-ray diffraction study of the catalysts by the powder method revealed that the product of the decomposition of Fe3(C3O4) 3-KCl-AC gave the characteristic spectrum of a-iron(Fig. 3) while that of Fe3 (C3O4) 3-AC gave no spectrum. It was also found, by comparing the Mossbauer spectra of the two systems, that in the catalyst from Fe2(C2O4)3-KCl-AC system the spectral lines of the fine particulate a-iron in paramagnetic region which corresponded to high catalytic activity disappeared.In conclusion, it is considered probable that the poisonous effect of chloride ion is due to the agglomeration of the superfine particles of a-iron which are the active centers of the catalyst for ammonia synthesis and ruthenum catalyst is much less sensitive to this agglomeration effect.

本文指出,氯离子是碱金属助催的合成氨催化剂Fe-AC(活性炭)-K(金属钾)体系的毒物。通过对含氯催化刑的活性测试,配合气相色谱、穆斯堡尔谱以及X-射线衍射图的研究,所得实验結果指出,KCl使催化剂中毒的机制是氯离子引起了高分散的小颗粒α-Fe的聚结,本文还讨论了氯离子对Fe体系和Ru体系催化剂的不同影响,归之于Fe系合成氨催化剂的结构敏感性。

Static Var Generator(SVG) with force-commutated inverters is a new type system of reactive power resources. It causes leading (or lagging) current to be drawn from the AC system using thyristor circuits rather than capacitors and reactors. It has been studied only for a few years. The principle of the SVG is discussed and proved by the test results on a physical simulator of the North-China Institute of Electric Power. It is intended to build an industrial prototype as the next step of research.

可控硅无功电源是一种新型的静止无功功率电源,它和电容器不同,不是靠储能元件,而是靠可控硅的强制换相能力,强迫电流越前(或滞后)于电压,从而产生(或吸收)无功功率。可控硅无功电源的研究工作在国外也刚刚起步。本文探讨了这种无功电源的工作原理,在此基础上进行了单相可控硅无功电源的物理模拟实验,验证了原理分析的正确性,为进一步研究正式装置做了准备工作。

 
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