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operating-point
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     This article divides the complex-pipes network into three types and gives an exactmothed to calculate the operating-point about the centrifagal-pump in use with these types.
     本文将化工、建筑、热力等复杂管网拉串联、并联、串并联方式进行分类,并找出了泵及管路的特性曲线数学表达式,用解析法较为准确地计算出泵与这些复杂管网联接使用时的工作点.并结合工程实例对每类计算进行了适当分析.
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  相似匹配句对
     On"the Operating Medium"
     “经营媒体”论
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     On the Concurrently Operating of the Hospital
     论医院的兼业经营
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     the ezt-operating mechanism;
     操动机构的选择原则;
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     The equipments of operating- room were badly.
     治疗室环境、设备条件简陋。
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     the point bounded.
     点有界。
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  operating-point
Adding a pair of fixed current sources allows reduced operating-point current in the output stage, while the resulting "leveraging" effect increases slew rate.
      


The object in view of this article is to apply 《The coordinate points function of the equidistants airway characteristics (to express by symbol E.A. C.)》in deter-mining the E. A. C. of any individual fan, when working togather with other fans in different kind of ventilation networks: The E. A. C. of a fan when treated toge-ther with The E. A. C. of any other fan, operating in combination, will be able to obtain the operating point of that fan. Because this function establishes conjunction of operations of fans,...

The object in view of this article is to apply 《The coordinate points function of the equidistants airway characteristics (to express by symbol E.A. C.)》in deter-mining the E. A. C. of any individual fan, when working togather with other fans in different kind of ventilation networks: The E. A. C. of a fan when treated toge-ther with The E. A. C. of any other fan, operating in combination, will be able to obtain the operating point of that fan. Because this function establishes conjunction of operations of fans, so that the function can help us to solve problems related to any works in combination.For illustrating the application of this method, this article aims to solve the following problems as some concrete examples.1. When three fans are working in parallel under complex or other conditions, to establish diagroms of E. A. C. for fan.2.When two fans are working in parallel, to establish Law of《How the coor dination points of E. A. C. vary with the working condition>.3.The reasonable condition which assuxe each fan in parallel working steadily,economically and will show its true individual operating-point value.4.The mothod of regulating fans when not working steadily to a steady condition.5. The method of choosing fans for working in parallel.

本文提出了利用《等值网路特性坐标点方程》来建立处于各种情况下联合工作的诸风机中任何一个风机的等值网路特性的方法.此特性和相应的风机特性的交点,即为该风机工况点.鉴于这个方程式建立了各风机工况之间的关系,从而可以利用这个方法来研究多风机联合工作的有关问题. 本文具体地研究了: 1.三台风机处于复杂的对角式通风系统中联合工作以及其他方式联合工作时,各个风机的等值网路特性; 2.两台风机并联工作时,等值网路特性随工作条件变化而变化的规律; 3.保证风机并联工作时的单值、稳定和经济工作的条件; 4.把风机从不稳定调整到稳定工作的方法; 5.选择处于并联工作的风机的方法.

Summary Temperature changes have great effect on the performance of transistor ampli- tiers.Intensive studies have been made on the stabilization of these amplifiers against temperature changes and quite a number of articles on this subject can be found in the literature.But most of them have centered their main object on the stabilization of d.c.operating point rather than on the stabilization of output voltage which should be the final aim for which we are to strive in any amplifier.In this article question...

Summary Temperature changes have great effect on the performance of transistor ampli- tiers.Intensive studies have been made on the stabilization of these amplifiers against temperature changes and quite a number of articles on this subject can be found in the literature.But most of them have centered their main object on the stabilization of d.c.operating point rather than on the stabilization of output voltage which should be the final aim for which we are to strive in any amplifier.In this article question of stabilization against temperature changes is discussed in general,nature of variations of transistor parameters is then explained,and finally are presented various methods of stabilization of output voltage of transistor audio amplifiers.The methods consist of compensation by means of displacement of d.c.operating points,both linear and nonlinear,compensation in terms of changes of h_(21) and h_(22) with temperature and negative feedback methods.Large amount of experimental work was done in connection with these methods.Curves illustrating the results obtained are herewith presented.

温度变化对于晶体管放大器的工作情况具有巨大影响。人们在这个问题上曾作深入研究。文献中关于这问题的文章已发表很多,但大多数的注意力均放在直流工作点的稳定而不在输出电压的稳定,在任何放大器输出电压的稳定应当是我们努力完成的最后目标,本文最先一般地讨论对温度的稳定性问题,随后说明了晶体管参量变化的性质,主要提出了若干稳定晶体管声频放大器输出电压的方法,其中包含直流工作点移动法(线性与非线性),h_(11)与h_(22)的温度补偿法,和负反馈方法。各种方法均做了大量实验,并附以实验的曲线。

Summary This paper analyzes the working principle and stability of a transistor mul- tivibrator operating as a frequency divider,with both sides being synchronized by the input signal.It is found that the frequency division stability of this circuit can further be increased when the multivibrator operates in the second class of oscillating condition,and that the optimum operating point is best determined from the actual base voltage changing characteristic.Some additional mothods of synchronization are studied.Finally,the...

Summary This paper analyzes the working principle and stability of a transistor mul- tivibrator operating as a frequency divider,with both sides being synchronized by the input signal.It is found that the frequency division stability of this circuit can further be increased when the multivibrator operates in the second class of oscillating condition,and that the optimum operating point is best determined from the actual base voltage changing characteristic.Some additional mothods of synchronization are studied.Finally,the methods of circuit design are given. Experimental results coincide fairly well with theoretical analysis.

本文分析了晶体管自激多谐振荡器用作双侧同步分频电路的一般理论和分频稳定性,并考虑基极电压变化规律来确定最佳分频的工作状态和运用点,同时对同步脉冲的引入问题亦作了原理性补充,还提出了振荡于第二类状态下的自激多谐振荡器可获得高稳定性的分频,以及此类双侧同步分频电路的设计方法。实验结果与理论计算基本上是一致的。

 
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